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Implement LSL(1)

This commit is contained in:
Jeffrey Pfau 2013-04-12 20:00:14 -07:00
parent 71c68fe79f
commit 21ee7946f1
1 changed files with 11 additions and 1 deletions
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12
src/isa-thumb.c
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@ -76,12 +76,22 @@ void ThumbStep(struct ARMCore* cpu) {
#define DEFINE_IMMEDIATE_5_INSTRUCTION_EX_THUMB(NAME, IMMEDIATE, BODY) \
DEFINE_INSTRUCTION_THUMB(NAME, \
int immediate = IMMEDIATE; \
int rd = opcode & 0x0007; \
int rm = (opcode >> 3) & 0x0007; \
BODY;)
#define DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(NAME, BODY) \
COUNT_5(DEFINE_IMMEDIATE_5_INSTRUCTION_EX_THUMB, NAME ## _, BODY)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(LSL1, ARM_STUB)
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]);)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(LSR1, ARM_STUB)
DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(ASR1, ARM_STUB)