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annotate backend.c @ 572:0f32f52fc98e

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Make some small changes in trans so that it is more likely to produce the same output as mustrans when given misbehaving programs. Add lea to testcases.txt. Improve the output of comparetest.py so that known issues can easily be separated from new ones.
author Michael Pavone <pavone@retrodev.com>
date Mon, 03 Mar 2014 21:08:43 -0800
parents dc9f178085a0
children a18e3923481e
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1 /*
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2 Copyright 2013 Michael Pavone
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3 This file is part of BlastEm.
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4 BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text.
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5 */
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6 #include "backend.h"
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7 #include <stdlib.h>
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8
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9 deferred_addr * defer_address(deferred_addr * old_head, uint32_t address, uint8_t *dest)
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10 {
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11 deferred_addr * new_head = malloc(sizeof(deferred_addr));
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12 new_head->next = old_head;
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13 new_head->address = address & 0xFFFFFF;
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14 new_head->dest = dest;
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15 return new_head;
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16 }
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17
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18 void remove_deferred_until(deferred_addr **head_ptr, deferred_addr * remove_to)
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19 {
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20 for(deferred_addr *cur = *head_ptr; cur && cur != remove_to; cur = *head_ptr)
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21 {
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22 *head_ptr = cur->next;
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23 free(cur);
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24 }
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25 }
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26
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27 void process_deferred(deferred_addr ** head_ptr, void * context, native_addr_func get_native)
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28 {
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29 deferred_addr * cur = *head_ptr;
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30 deferred_addr **last_next = head_ptr;
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31 while(cur)
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32 {
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33 code_ptr native = get_native(context, cur->address);//get_native_address(opts->native_code_map, cur->address);
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34 if (native) {
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35 int32_t disp = native - (cur->dest + 4);
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36 code_ptr out = cur->dest;
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37 *(out++) = disp;
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38 disp >>= 8;
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39 *(out++) = disp;
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40 disp >>= 8;
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41 *(out++) = disp;
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42 disp >>= 8;
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43 *out = disp;
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44 *last_next = cur->next;
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45 free(cur);
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46 cur = *last_next;
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47 } else {
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48 last_next = &(cur->next);
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49 cur = cur->next;
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50 }
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51 }
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52 }
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