mirror of https://github.com/mgba-emu/mgba.git
67 lines
2.0 KiB
C
67 lines
2.0 KiB
C
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#include "isa-thumb.h"
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static const ThumbInstruction _thumbTable[0x400];
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// Instruction definitions
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#define APPLY(F, ...) F(__VA_ARGS__)
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#define DUMMY(...) __VA_ARGS__
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#define COUNT_1(EMITTER, PREFIX, ...) \
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EMITTER(PREFIX ## 0, __VA_ARGS__) \
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EMITTER(PREFIX ## 1, __VA_ARGS__)
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#define COUNT_2(EMITTER, PREFIX, ...) \
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COUNT_1(EMITTER, PREFIX, __VA_ARGS__) \
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EMITTER(PREFIX ## 2, __VA_ARGS__) \
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EMITTER(PREFIX ## 3, __VA_ARGS__)
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#define COUNT_3(EMITTER, PREFIX, ...) \
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COUNT_2(EMITTER, PREFIX, __VA_ARGS__) \
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EMITTER(PREFIX ## 4, __VA_ARGS__) \
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EMITTER(PREFIX ## 5, __VA_ARGS__) \
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EMITTER(PREFIX ## 6, __VA_ARGS__) \
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EMITTER(PREFIX ## 7, __VA_ARGS__)
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#define COUNT_4(EMITTER, PREFIX, ...) \
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COUNT_3(EMITTER, PREFIX, __VA_ARGS__) \
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EMITTER(PREFIX ## 8, __VA_ARGS__) \
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EMITTER(PREFIX ## 9, __VA_ARGS__) \
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EMITTER(PREFIX ## A, __VA_ARGS__) \
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EMITTER(PREFIX ## B, __VA_ARGS__) \
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EMITTER(PREFIX ## C, __VA_ARGS__) \
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EMITTER(PREFIX ## D, __VA_ARGS__) \
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EMITTER(PREFIX ## E, __VA_ARGS__) \
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EMITTER(PREFIX ## F, __VA_ARGS__)
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#define COUNT_5(EMITTER, PREFIX, ...) \
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COUNT_4(EMITTER, PREFIX ## 0, __VA_ARGS__) \
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COUNT_4(EMITTER, PREFIX ## 1, __VA_ARGS__)
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#define THUMB_WRITE_PC \
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cpu->gprs[ARM_PC] = (cpu->gprs[ARM_PC] & -WORD_SIZE_THUMB) + WORD_SIZE_THUMB
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#define DEFINE_INSTRUCTION_THUMB(NAME, BODY) \
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static void _ThumbInstruction ## NAME (struct ARMCore* cpu, uint16_t opcode) { \
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BODY; \
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}
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#define DEFINE_SHIFT_INSTRUCTION_THUMB(NAME, BODY) \
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COUNT_5(DEFINE_INSTRUCTION_THUMB, NAME ## _, BODY)
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DEFINE_SHIFT_INSTRUCTION_THUMB(LSL, )
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DEFINE_SHIFT_INSTRUCTION_THUMB(LSR, )
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DEFINE_SHIFT_INSTRUCTION_THUMB(ASR, )
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#define DECLARE_INSTRUCTION_THUMB(EMITTER, NAME) \
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EMITTER ## NAME
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#define DECLARE_THUMB_EMITTER_BLOCK(EMITTER) \
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APPLY(COUNT_5, DUMMY, DECLARE_INSTRUCTION_THUMB(EMITTER, LSL_)) \
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APPLY(COUNT_5, DUMMY, DECLARE_INSTRUCTION_THUMB(EMITTER, LSR_)) \
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APPLY(COUNT_5, DUMMY, DECLARE_INSTRUCTION_THUMB(EMITTER, ASR_)) \
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static const ThumbInstruction _thumbTable[0x400] = {
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DECLARE_THUMB_EMITTER_BLOCK(_ThumbInstruction)
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};
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