Mercurial > repos > blastem
view jagcpu.h @ 2069:8e51c0c3f2e3 segacd
Initial attempt at implementing the Sega CD graphics hardware
author | Michael Pavone <pavone@retrodev.com> |
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date | Sun, 30 Jan 2022 19:55:33 -0800 |
parents | c48d5191ddc9 |
children |
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#ifndef JAGCPU_H_ #define JAGCPU_H_ enum { JAG_ADD, JAG_ADDC, JAG_ADDQ, JAG_ADDQT, JAG_SUB, JAG_SUBC, JAG_SUBQ, JAG_SUBQT, JAG_NEG, JAG_AND, JAG_OR, JAG_XOR, JAG_NOT, JAG_BTST, JAG_BSET, JAG_BCLR, JAG_MULT, JAG_IMULT, JAG_IMULTN, JAG_RESMAC, JAG_IMACN, JAG_DIV, JAG_ABS, JAG_SH, JAG_SHLQ, JAG_SHRQ, JAG_SHA, JAG_SHARQ, JAG_ROR, JAG_RORQ, JAG_CMP, JAG_CMPQ, GPU_SAT8, DSP_SUBQMOD = GPU_SAT8, GPU_SAT16, DSP_SAT16S = GPU_SAT16, JAG_MOVE, JAG_MOVEQ, JAG_MOVETA, JAG_MOVEFA, JAG_MOVEI, JAG_LOADB, JAG_LOADW, JAG_LOAD, GPU_LOADP, DSP_SAT32S = GPU_LOADP, JAG_LOAD_R14_REL, JAG_LOAD_R15_REL, JAG_STOREB, JAG_STOREW, JAG_STORE, GPU_STOREP, DSP_MIRROR = GPU_STOREP, JAG_STORE_R14_REL, JAG_STORE_R15_REL, JAG_MOVE_PC, JAG_JUMP, JAG_JR, JAG_MMULT, JAG_MTOI, JAG_NORMI, JAG_NOP, JAG_LOAD_R14_INDEXED, JAG_LOAD_R15_INDEXED, JAG_STORE_R14_INDEXED, JAG_STORE_R15_INDEXED, GPU_SAT24, GPU_PACK, DSP_ADDQMOD = GPU_PACK, GPU_UNPACK //virtual opcode, UNPACK is PACK with a reg1 field set to 1 }; #define JAGCPU_NOREG -1 typedef struct { cpu_options gen; int8_t regs[32]; int8_t result; int8_t resultreg; int8_t bankptr; uint8_t is_gpu; } jag_cpu_options; typedef struct { uint32_t read_high; } jag_gpu; typedef struct { uint8_t mac_high; uint8_t modulo; } jag_dsp; typedef struct { uint32_t cycles; uint32_t regs[64]; uint32_t *main; uint32_t *alt; uint32_t pc; uint32_t result; uint32_t flags; uint32_t flags_pending; uint32_t remainder; union { jag_gpu gpu; jag_dsp dsp; }; int8_t writeback; int8_t resultreg; uint8_t is_gpu; } jag_cpu; uint16_t jag_opcode(uint16_t inst, uint8_t is_gpu); char * jag_cc(uint16_t inst); uint16_t jag_reg2(uint16_t inst); uint32_t jag_jr_dest(uint16_t inst, uint32_t address); int jag_cpu_disasm(uint16_t **stream, uint32_t address, char *dst, uint8_t is_gpu, uint8_t labels); #endif