repos/simple16: src/asm.c annotate

annotate src/asm.c @ 46:51672bd41cdd

Rework data segment setup to allow a stack segment and to add space for push and pop instructions

author	Michael Pavone <pavone@retrodev.com>
date	Tue, 30 Aug 2016 20:50:54 -0700
parents	718aaedc4582
children	f9846719aa26

rev	line source
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	1 #include <stdint.h>
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	2 #include <string.h>
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	3 #include <stdio.h>
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	4 #include <stddef.h>
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	5 #include <stdlib.h>
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	6 #include <ctype.h>
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	7 #include "cpu.h"
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	8
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	9 typedef enum {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	10 IMMED4,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	11 IMMED8,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	12 IMMEDHI,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	13 BCCDST,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	14 DCB,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	15 DCW,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	16 DCL
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	17 } reftype;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	18
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	19 typedef struct {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	20 uint16_t address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	21 reftype type;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	22 } reference;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	23
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	24
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	25 typedef struct {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	26 char *name;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	27 reference *references;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	28 size_t num_references;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	29 size_t reference_storage;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	30 uint16_t address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	31 uint8_t valid;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	32 } label;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	33
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	34 typedef struct {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	35 label *labels;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	36 size_t num_labels;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	37 size_t label_storage;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	38 } label_meta;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	39
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	40 typedef struct {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	41 int immed_min;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	42 int immed_max;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	43 uint16_t base;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	44 uint8_t first_shift;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	45 uint8_t second_shift;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	46 uint8_t expected_args;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	47 } inst_info;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	48
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	49 label add_label(label_meta labels, char *name, uint16_t address, uint8_t valid)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	50 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	51 if (labels->num_labels == labels->label_storage) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	52 labels->label_storage *= 2;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	53 labels->labels = realloc(labels->labels, sizeof(label) * labels->label_storage);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	54 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	55 labels->labels[labels->num_labels].name = strdup(name);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	56 labels->labels[labels->num_labels].references = NULL;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	57 labels->labels[labels->num_labels].address = address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	58 labels->labels[labels->num_labels].valid = valid;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	59 labels->num_labels++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	60 return labels->labels + labels->num_labels - 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	61 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	62
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	63 label find_label(label_meta meta, char *name)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	64 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	65 for (size_t i = 0; i < meta->num_labels; i++)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	66 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	67 if (!strcmp(name, meta->labels[i].name)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	68 return meta->labels + i;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	69 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	70 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	71 return NULL;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	72 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	73
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	74 uint16_t find_string_arr(char ** list, char *str, uint16_t num_entries)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	75 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	76 for (uint16_t i = 0; i < num_entries; i++)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	77 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	78 if (!strcmp(list[i], str)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	79 return i;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	80 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	81 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	82 return num_entries;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	83 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	84
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	85 inst_info find_mnemonic(char *mnemonic)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	86 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	87 uint16_t index = find_string_arr(mnemonics, mnemonic, SINGLE_SOURCE);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	88 inst_info ret;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	89 if (index < SINGLE_SOURCE) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	90 ret.base = index;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	91 ret.first_shift = 4;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	92 if (index == LDIM \|\| index == LDIMH) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	93 ret.second_shift = 12;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	94 ret.expected_args = 2;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	95 ret.immed_min = -128;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	96 ret.immed_max = 256;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	97 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	98 ret.second_shift = 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	99 ret.expected_args = 3;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	100 ret.immed_min = ret.immed_max = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	101 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	102 return ret;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	103 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	104 index = find_string_arr(mnemonics_single_src, mnemonic, SINGLE_REG);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	105 if (index < SINGLE_REG) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	106 ret.base = index << 4 \| SINGLE_SOURCE;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	107 ret.first_shift = 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	108 ret.second_shift = 12;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	109 ret.expected_args = 2;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	110 if (index >= INI) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	111 if (index >= ADDI) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	112 ret.immed_min = -8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	113 ret.immed_max = 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	114 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	115 ret.immed_min = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	116 ret.immed_max = 15;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	117 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	118 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	119 ret.immed_min = ret.immed_max = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	120 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	121 return ret;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	122 }
46 51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	123 index = find_string_arr(mnemonics_single_reg, mnemonic, SETVBR+1);
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	124 if (index > SETVBR) {
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	125 ret.base = 0xFFFF;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	126 return ret;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	127 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	128 ret.base = index << 8 \| SINGLE_REG << 4 \| SINGLE_SOURCE;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	129 ret.immed_min = ret.immed_max = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	130 ret.first_shift = 12;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	131 ret.second_shift = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	132 ret.expected_args = 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	133 return ret;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	134 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	135
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	136 void add_reference(label *label, uint16_t address, reftype type)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	137 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	138 if (!label->references) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	139 label->reference_storage = 4;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	140 label->references = malloc(sizeof(reference) * label->reference_storage);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	141 label->num_references = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	142 } else if (label->num_references == label->reference_storage) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	143 label->reference_storage *= 2;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	144 label->references = realloc(label->references, sizeof(reference) * label->reference_storage);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	145 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	146
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	147 label->references[label->num_references].address = address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	148 label->references[label->num_references].type = type;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	149 label->num_references++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	150 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	151
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	152 char * get_arg(char **pos)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	153 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	154 char linebuf = pos;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	155 while (linebuf && isspace(linebuf) && *linebuf != ';')
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	156 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	157 linebuf++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	158 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	159 char * start = linebuf;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	160 char * end = start;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	161 while (linebuf && linebuf != ';' && *linebuf != ',')
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	162 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	163 if (!isspace(*linebuf)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	164 end = linebuf+1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	165 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	166 linebuf++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	167 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	168 if (start == end) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	169 return NULL;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	170 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	171 if (*end) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	172 if (*linebuf == ',') {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	173 linebuf++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	174 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	175 linebuf = end;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	176 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	177 *end = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	178 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	179 *pos = linebuf;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	180 return start;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	181 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	182
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	183 void free_labels (label_meta *meta)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	184 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	185 for (size_t i = 0; i < meta->num_labels; i++)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	186 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	187 free(meta->labels[i].name);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	188 if(meta->labels[i].references) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	189 free(meta->labels[i].references);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	190 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	191 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	192 free(meta->labels);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	193 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	194
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	195 int handle_dc(char size, char linebuf, uint8_t outbuf, uint16_t pc, label_meta meta)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	196 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	197 char *arg;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	198 long value;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	199 char *start = linebuf;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	200 char *orig = strdup(linebuf);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	201 int in_string = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	202 while ((arg = in_string ? linebuf : get_arg(&linebuf)))
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	203 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	204 //TODO: actual error checking
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	205 if (arg[0] == '$' \|\| (arg[0] == '0' && arg[1] == 'x')) {
10 9f575f77a157 Fix parsing of hex literals in assembler Michael Pavone <pavone@retrodev.com> parents: 6 diff changeset	206 value = strtol(arg[0] == '$' ? arg+1 : arg+2, NULL, 16);
12 d4112095b93f Allow negative decimal literals Michael Pavone <pavone@retrodev.com> parents: 10 diff changeset	207 } else if (arg[0] >= '0' && arg[0] <= '9' \|\| arg[0] == '-') {
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	208 value = strtol(arg, NULL, 10);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	209 } else if (arg[0] == '"') {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	210 if (arg[1] == '"') {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	211 //emtpy string or end of string
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	212 in_string = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	213 continue;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	214 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	215 if (arg[1] == '\\' && arg[2]) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	216 switch(arg[2])
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	217 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	218 case 'n':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	219 value = '\n';
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	220 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	221 case 't':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	222 value = '\t';
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	223 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	224 case 'r':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	225 value = '\r';
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	226 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	227 case '"':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	228 case '\\':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	229 value = arg[2];
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	230 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	231 default:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	232 fprintf(stderr, "WARNING: Unrecognized escape char %c\n", arg[2]);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	233 value = arg[2];
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	234 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	235 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	236 arg++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	237 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	238 value = arg[1];
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	239 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	240 in_string = 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	241 arg[1] = '"';
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	242 linebuf = arg+1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	243 int len = strlen(linebuf);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	244 //undo termination done by get_arg
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	245 linebuf[len] = orig[len + linebuf-start];
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	246 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	247 label *l = find_label(meta, arg);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	248 if (!l) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	249 l = add_label(meta, arg, 0, 0);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	250 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	251 if (l->valid) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	252 value = l->address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	253 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	254 value = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	255 add_reference(l, *pc, size == 'b' ? DCB : size == 'w' ? DCW : DCL);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	256 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	257 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	258 switch (size)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	259 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	260 case 'b':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	261 if (value < -128 \|\| value > 255) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	262 fprintf(stderr, "WARNING: %s is too large to fit in a byte\n", arg);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	263 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	264 if (pc >= 48 1024) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	265 fputs("ERROR: Hit end of ROM space\n", stderr);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	266 free(orig);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	267 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	268 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	269 outbuf[(*pc)++] = value;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	270 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	271 case 'w':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	272 if (value < -32768 \|\| value > 65535) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	273 fprintf(stderr, "WARNING: %s is too large to fit in a word\n", arg);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	274 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	275 if (pc >= 48 1024 - 1) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	276 fputs("ERROR: Hit end of ROM space\n", stderr);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	277 free(orig);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	278 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	279 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	280 outbuf[(*pc)++] = value >> 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	281 outbuf[(*pc)++] = value;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	282 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	283 case 'l':
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	284 if (pc >= 48 1024 - 3) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	285 fputs("ERROR: Hit end of ROM space\n", stderr);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	286 free(orig);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	287 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	288 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	289 outbuf[(*pc)++] = value >> 24;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	290 outbuf[(*pc)++] = value >> 16;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	291 outbuf[(*pc)++] = value >> 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	292 outbuf[(*pc)++] = value;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	293 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	294 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	295 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	296 free(orig);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	297 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	298 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	299
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	300 int process_arg(uint16_t inst, char arg, int arg_shift, int immed_min, int immed_max, label_meta *meta, uint16_t pc)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	301 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	302 long value;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	303 if (arg[0] == 'r' && arg[1] >= '0' && arg[1] <= '9' && (arg[2] == 0 \|\| arg[3] == 0)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	304 //posible register
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	305 value = strtol(arg+1, NULL, 10);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	306 if (value >= 0 && value < 16) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	307 *inst \|= value << arg_shift;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	308 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	309 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	310 }
46 51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	311 if (!strcmp(arg, "db")) {
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	312 *inst \|= REG_DB << arg_shift;
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	313 return 1;
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	314 }
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	315 if (!strcmp(arg, "sp")) {
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	316 *inst \|= REG_SP << arg_shift;
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	317 return 1;
51672bd41cdd Rework data segment setup to allow a stack segment and to add space for push and pop instructions Michael Pavone <pavone@retrodev.com> parents: 44 diff changeset	318 }
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	319 if (!strcmp(arg, "pc")) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	320 *inst \|= REG_PC << arg_shift;
25 fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file Michael Pavone <pavone@retrodev.com> parents: 12 diff changeset	321 return 1;
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	322 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	323 if (!strcmp(arg, "sr")) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	324 *inst \|= REG_SR << arg_shift;
25 fb14515266f4 Implemented timer and timer interrupts. Added get/setvbr instructions. Fixed assembler bug. Moved mnemonics into a separate source file Michael Pavone <pavone@retrodev.com> parents: 12 diff changeset	325 return 1;
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	326 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	327 if (immed_min == immed_max) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	328 fprintf(stderr, "ERROR: Non-register argument %s where a register is required\n", arg);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	329 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	330 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	331
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	332 //TODO: actual error checking
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	333 if (arg[0] == '$' \|\| (arg[0] == '0' && arg[1] == 'x')) {
10 9f575f77a157 Fix parsing of hex literals in assembler Michael Pavone <pavone@retrodev.com> parents: 6 diff changeset	334 value = strtol(arg[0] == '$' ? arg+1 : arg+2, NULL, 16);
12 d4112095b93f Allow negative decimal literals Michael Pavone <pavone@retrodev.com> parents: 10 diff changeset	335 } else if (arg[0] >= '0' && arg[0] <= '9' \|\| arg[0] == '-') {
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	336 value = strtol(arg, NULL, 10);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	337 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	338 label *l = find_label(meta, arg);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	339 if (!l) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	340 l = add_label(meta, arg, 0, 0);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	341 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	342 if (l->valid) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	343 value = l->address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	344 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	345 value = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	346 add_reference(l, pc, (inst & 0xF) == LDIMH ? IMMEDHI : (inst & 0xF) == LDIM ? IMMED8 : IMMED4);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	347 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	348 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	349 if (value > immed_max \|\| value < immed_min) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	350 fprintf(stderr, "WARNING: %s is too big to fit in an %s\n", arg, (*inst & 0xF) <= LDIMH ? "byte" : "nibble");
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	351 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	352 if (immed_max == 8) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	353 if (value == 8) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	354 value = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	355 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	356 value &= 0xF;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	357 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	358 value &= 0xFF;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	359 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	360 *inst \|= value << arg_shift;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	361 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	362 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	363
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	364 char * condition_names[] = {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	365 "ra", "rn", "eq", "ne", "mi", "pl", "cs", "cc", "gr", "le"
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	366 };
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	367
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	368 int handle_bcc(char cc, char args, uint8_t outbuf, uint16_t pc, label_meta meta)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	369 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	370 uint16_t intcc = find_string_arr(condition_names, cc, COND_LEQ+1);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	371 if (intcc > COND_LEQ) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	372 fprintf(stderr, "ERROR: Invalid condition code %s\n", cc);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	373 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	374 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	375 char *dest = get_arg(&args);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	376 if (!dest) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	377 fprintf(stderr, "ERROR: Missing argument to b%s\n", cc);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	378 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	379 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	380 char *extra = get_arg(&args);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	381 if (extra) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	382 fprintf(stderr, "ERROR: Extra argument %s to b%s\n", extra, cc);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	383 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	384 label *l = find_label(meta, dest);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	385 if (!l) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	386 l = add_label(meta, dest, 0, 0);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	387 add_reference(l, pc, BCCDST);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	388 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	389 uint16_t dest_addr = l->valid ? l->address : pc + 4;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	390 if (dest_addr & 1) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	391 fprintf(stderr, "ERROR: Label %s refers to odd address %X which is illegal for b%s\n", dest, dest_addr, cc);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	392 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	393 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	394 int32_t diff = dest_addr - (pc + 4);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	395 if (diff < -512 \|\| diff > 510) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	396 fprintf(stderr, "ERROR: Label %s is out of range for b%s\n", dest, cc);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	397 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	398 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	399 diff &= 0x1FE;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	400 uint16_t inst = BCC \| diff << 3 \| intcc << 12;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	401 outbuf[pc] = inst >> 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	402 outbuf[pc+1] = inst;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	403 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	404 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	405
29 5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	406 uint8_t handle_incbin(char cur, uint8_t outbuf, uint16_t *pc)
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	407 {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	408 char * end = strchr(cur, ';');
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	409 if (end) {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	410 *end = 0;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	411 } else {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	412 end = cur + strlen(cur);
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	413 }
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	414 while (end - cur > 1 && isspace(*(end-1)))
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	415 {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	416 end--;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	417 }
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	418 *end = 0;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	419 FILE *incfile = fopen(cur, "rb");
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	420 if (!incfile) {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	421 fprintf(stderr, "Failed to open inclued file %s for reading\n", cur);
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	422 return 0;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	423 }
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	424 size_t read = fread(outbuf + pc, 1, 481024-*pc, incfile);
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	425 fclose(incfile);
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	426 *pc += read;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	427 return 1;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	428 }
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	429
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	430 uint8_t assemble_file(FILE input, FILE output)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	431 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	432 //fixed size buffers are lame, but so are lines longer than 4K characters
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	433 //this is good enough for the really simple first version
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	434 char linebuf[4096];
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	435 //maximum program size is 48KB
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	436 uint8_t outbuf[48*1024];
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	437 uint16_t pc = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	438
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	439 size_t num_labels = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	440 size_t label_storage = 1024;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	441 label_meta labels = {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	442 .labels = malloc(sizeof(label) * 1024),
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	443 .label_storage = 1024,
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	444 .num_labels = 0
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	445 };
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	446 int line = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	447
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	448 while (fgets(linebuf, sizeof(linebuf), input) && pc < sizeof(outbuf)/sizeof(uint16_t))
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	449 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	450 line++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	451 char *lname = NULL;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	452 char *cur = linebuf;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	453 if (!isspace(*cur)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	454 lname = cur;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	455 while(cur && cur != ':' && !isspace(*cur))
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	456 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	457 cur++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	458 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	459 if (*cur) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	460 *cur = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	461 cur++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	462 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	463 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	464 while (cur && isspace(cur))
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	465 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	466 cur++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	467 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	468 if (!cur \|\| cur == ';') {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	469 if (lname) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	470 label *l = find_label(&labels, lname);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	471 if (l) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	472 l->address = pc;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	473 l->valid = 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	474 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	475 add_label(&labels, lname, pc, 1);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	476 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	477 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	478 continue;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	479 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	480 char *mnemonic = cur;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	481 while (cur && !isspace(cur) && *cur != ';')
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	482 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	483 cur++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	484 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	485 if (!cur \|\| cur == ';') {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	486 *cur = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	487 fprintf(stderr, "Missing arguments to instruction %s on line %d\n", mnemonic, line);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	488 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	489 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	490 *cur = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	491 cur++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	492 if (!strncmp(mnemonic, "dc.", 3) && (mnemonic[3] == 'b' \|\| mnemonic[3] == 'w' \|\| mnemonic[3] == 'l')) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	493 if (mnemonic[3] != 'b' && pc & 1) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	494 outbuf[pc] = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	495 pc++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	496 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	497 if (lname) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	498 label *l = find_label(&labels, lname);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	499 if (l) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	500 l->address = pc;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	501 l->valid = 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	502 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	503 add_label(&labels, lname, pc, 1);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	504 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	505 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	506 if (!handle_dc(mnemonic[3], cur, outbuf, &pc, &labels)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	507 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	508 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	509 continue;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	510 }
29 5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	511 if (!strcmp(mnemonic, "incbin")) {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	512 if (!handle_incbin(cur, outbuf, &pc)) {
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	513 goto error;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	514 }
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	515 continue;
5a8b5f9fc50a Added incbin directive to assembler Michael Pavone <pavone@retrodev.com> parents: 25 diff changeset	516 }
6 74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	517 //automatically align to word boundary
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	518 if (pc & 1) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	519 outbuf[pc] = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	520 pc++;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	521 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	522 if (lname) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	523 label *l = find_label(&labels, lname);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	524 if (l) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	525 l->address = pc;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	526 l->valid = 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	527 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	528 add_label(&labels, lname, pc, 1);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	529 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	530 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	531 if (mnemonic[0] == 'b' && strlen(mnemonic) == 3) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	532 if (!handle_bcc(mnemonic + 1, cur, outbuf, pc, &labels)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	533 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	534 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	535 pc+=2;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	536 continue;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	537 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	538 char *firstarg = get_arg(&cur);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	539
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	540 if (!firstarg) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	541 fprintf(stderr, "Missing arguments to instruction %s on line %d\n", mnemonic, line);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	542 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	543 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	544 char *secondarg = get_arg(&cur);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	545 char *thirdarg;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	546 int num_args;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	547 if (secondarg) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	548 thirdarg = get_arg(&cur);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	549 num_args = thirdarg ? 3 : 2;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	550 } else {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	551 thirdarg = NULL;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	552 num_args = 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	553 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	554
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	555 inst_info inf = find_mnemonic(mnemonic);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	556 if (inf.base == 0xFFFF) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	557 fprintf(stderr, "Invalid mnemonic %s on line %d\n", mnemonic, line);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	558 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	559 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	560 if (inf.expected_args != num_args) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	561 fprintf(stderr, "Instruction %s expects %d args, but %d were given on line %d\n", mnemonic, inf.expected_args, num_args, line);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	562 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	563 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	564
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	565 uint16_t inst = inf.base;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	566 if (!process_arg(&inst, firstarg, inf.first_shift, inf.immed_min, inf.immed_max, &labels, pc)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	567 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	568 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	569 if (secondarg) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	570 if (!process_arg(&inst, secondarg, inf.second_shift, 0, 0, &labels, pc)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	571 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	572 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	573 if (thirdarg) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	574 if (!process_arg(&inst, thirdarg, inf.second_shift+4, 0, 0, &labels, pc)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	575 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	576 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	577 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	578 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	579 outbuf[pc++] = inst >> 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	580 outbuf[pc++] = inst;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	581 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	582 for (int i = 0; i < labels.num_labels; i++)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	583 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	584 if (labels.labels[i].references) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	585 if (!labels.labels[i].valid) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	586 fprintf(stderr, "ERROR: label %s is used but not defined\n", labels.labels[i].name);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	587 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	588 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	589 uint16_t address = labels.labels[i].address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	590 for(reference *ref = labels.labels[i].references;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	591 ref < labels.labels[i].references + labels.labels[i].num_references;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	592 ref++
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	593 )
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	594 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	595 //TODO: Warn when addresses don't fit
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	596 switch(ref->type)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	597 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	598 case IMMED4:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	599 if (address == 8) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	600 address = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	601 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	602 outbuf[ref->address] \|= address & 0xF;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	603 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	604 case IMMED8:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	605 outbuf[ref->address] \|= (address & 0xF0) >> 4;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	606 outbuf[ref->address+1] \|= (address & 0xF) << 4;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	607 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	608 case IMMEDHI:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	609 outbuf[ref->address] \|= (address & 0xF000) >> 12;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	610 outbuf[ref->address+1] \|= (address & 0xF00) >> 4;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	611 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	612 case BCCDST: {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	613 if (address & 1) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	614 fprintf(stderr, "ERROR: Label %s refers to odd address %X which is illegal for bcc\n", labels.labels[i].name, address);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	615 goto error;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	616 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	617 int diff = address - (ref->address + 4);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	618 if (diff < -512 \|\| diff > 510) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	619 fprintf(stderr, "ERROR: Label %s has address %X which is out of range of bcc at %X\n", labels.labels[i].name, address, ref->address);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	620 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	621 outbuf[ref->address] \|= (diff & 0x1E0) >> 5;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	622 outbuf[ref->address+1] \|= (diff & 0x01E) << 3;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	623 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	624 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	625 case DCB:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	626 outbuf[ref->address] = address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	627 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	628 case DCW:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	629 outbuf[ref->address] = address >> 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	630 outbuf[ref->address+1] = address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	631 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	632 case DCL:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	633 outbuf[ref->address] = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	634 outbuf[ref->address+1] = 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	635 outbuf[ref->address+2] = address >> 8;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	636 outbuf[ref->address+3] = address;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	637 break;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	638 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	639 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	640 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	641 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	642 if (pc == fwrite(outbuf, 1, pc, output)) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	643 free_labels(&labels);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	644 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	645 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	646 fputs("Error writing to output file\n", stderr);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	647 error:
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	648 free_labels(&labels);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	649 return 0;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	650 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	651
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	652
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	653 int main(int argc, char ** argv)
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	654 {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	655 if (argc < 3) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	656 fputs("Usage: asm INFILE OUTFILE\n", stderr);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	657 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	658 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	659 FILE *infile = strcmp("-", argv[1]) ? fopen(argv[1], "r") : stdin;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	660 if (!infile) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	661 fprintf(stderr, "Failed to open %s for reading\n", argv[1]);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	662 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	663 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	664 FILE *outfile = strcmp("-", argv[2]) ? fopen(argv[2], "w") : stdout;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	665 if (!outfile) {
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	666 fprintf(stderr, "Failed to open %s for writing\n", argv[2]);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	667 return 1;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	668 }
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	669 int ret = assemble_file(infile, outfile);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	670 fclose(infile);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	671 fclose(outfile);
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	672 return ret;
74a6d629b78f Added assembler. Removed hand-assembled version of hello world example Michael Pavone <pavone@retrodev.com> parents: diff changeset	673 }

Mercurial > repos > simple16

annotate src/asm.c @ 46:51672bd41cdd