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Implement LSR(1) and reindent LSL(1)

This commit is contained in:
Jeffrey Pfau 2013-04-12 22:24:35 -07:00
parent 9ca65038ed
commit 36670b3fa2
1 changed files with 17 additions and 8 deletions
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25
src/isa-thumb.c
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@ -90,15 +90,24 @@ void ThumbStep(struct ARMCore* cpu) {
COUNT_5(DEFINE_IMMEDIATE_5_INSTRUCTION_EX_THUMB, NAME ## _, BODY)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(LSL1, \
if (!immediate) { \
cpu->gprs[rd] = cpu->gprs[rm]; \
} else { \
cpu->cpsr.c = cpu->gprs[rm] & (1 << (32 - immediate)); \
cpu->gprs[rd] = cpu->gprs[rm] << immediate; \
} \
THUMB_NEUTRAL_S( , , cpu->gprs[rd]);)
if (!immediate) { \
cpu->gprs[rd] = cpu->gprs[rm]; \
} else { \
cpu->cpsr.c = cpu->gprs[rm] & (1 << (32 - immediate)); \
cpu->gprs[rd] = cpu->gprs[rm] << immediate; \
} \
THUMB_NEUTRAL_S( , , cpu->gprs[rd]);)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(LSR1,
if (!immediate) { \
cpu->cpsr.c = ARM_SIGN(cpu->gprs[rm]); \
cpu->gprs[rd] = 0; \
} else { \
cpu->cpsr.c = cpu->gprs[rm] & (1 << (immediate - 1)); \
cpu->gprs[rd] = ((uint32_t) cpu->gprs[rm]) >> immediate; \
} \
THUMB_NEUTRAL_S( , , cpu->gprs[rd]);)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(LSR1, ARM_STUB)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(ASR1, ARM_STUB)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(LDR1, cpu->gprs[rd] = cpu->memory->load32(cpu->memory, cpu->gprs[rm] + immediate * 4))