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Implement CMP(1)

This commit is contained in:
Jeffrey Pfau 2013-04-12 22:44:51 -07:00
parent 3a097dca96
commit be8849d7fe
1 changed files with 7 additions and 1 deletions
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8
src/isa-thumb.c
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@ -22,6 +22,12 @@ void ThumbStep(struct ARMCore* cpu) {
cpu->cpsr.c = ARM_CARRY_FROM(M, N, D); \
cpu->cpsr.v = ARM_V_ADDITION(M, N, D);
#define THUMB_SUBTRACTION_S(M, N, D) \
cpu->cpsr.n = ARM_SIGN(D); \
cpu->cpsr.z = !(D); \
cpu->cpsr.c = ARM_BORROW_FROM(M, N, D); \
cpu->cpsr.v = ARM_V_SUBTRACTION(M, N, D);
#define THUMB_NEUTRAL_S(M, N, D) \
cpu->cpsr.n = ARM_SIGN(D); \
cpu->cpsr.z = !(D);
@ -162,7 +168,7 @@ DEFINE_DATA_FORM_2_INSTRUCTION_THUMB(SUB, ARM_STUB)
DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(ADD2, THUMB_ADDITION(cpu->gprs[rd], cpu->gprs[rd], immediate))
DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(CMP1, ARM_STUB)
DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(CMP1, int aluOut = cpu->gprs[rd] - immediate; THUMB_SUBTRACTION_S(cpu->gprs[rd], immediate, aluOut))
DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(MOV1, cpu->gprs[rd] = immediate; THUMB_NEUTRAL_S(, , cpu->gprs[rd]))
DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(SUB2, ARM_STUB)