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Implement ADD(3), refactor other ADDs

This commit is contained in:
Jeffrey Pfau 2013-04-12 22:34:44 -07:00
parent 36670b3fa2
commit 3a097dca96
1 changed files with 13 additions and 10 deletions
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23
src/isa-thumb.c
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@ -20,12 +20,18 @@ void ThumbStep(struct ARMCore* cpu) {
cpu->cpsr.n = ARM_SIGN(D); \
cpu->cpsr.z = !(D); \
cpu->cpsr.c = ARM_CARRY_FROM(M, N, D); \
cpu->cpsr.v = ARM_V_ADDITION(M, N, D); \
cpu->cpsr.v = ARM_V_ADDITION(M, N, D);
#define THUMB_NEUTRAL_S(M, N, D) \
cpu->cpsr.n = ARM_SIGN(D); \
cpu->cpsr.z = !(D);
#define THUMB_ADDITION(D, M, N) \
int n = N; \
int m = M; \
D = M + N; \
THUMB_ADDITION_S(m, n, D)
#define APPLY(F, ...) F(__VA_ARGS__)
#define COUNT_1(EMITTER, PREFIX, ...) \
@ -120,12 +126,14 @@ DEFINE_IMMEDIATE_5_INSTRUCTION_THUMB(STRH1, cpu->memory->store16(cpu->memory, cp
#define DEFINE_DATA_FORM_1_INSTRUCTION_EX_THUMB(NAME, RM, BODY) \
DEFINE_INSTRUCTION_THUMB(NAME, \
int rm = RM; \
int rd = opcode & 0x0007; \
int rn = (opcode >> 3) & 0x0007; \
BODY;)
#define DEFINE_DATA_FORM_1_INSTRUCTION_THUMB(NAME, BODY) \
COUNT_3(DEFINE_DATA_FORM_1_INSTRUCTION_EX_THUMB, NAME ## 3_R, BODY)
DEFINE_DATA_FORM_1_INSTRUCTION_THUMB(ADD, ARM_STUB)
DEFINE_DATA_FORM_1_INSTRUCTION_THUMB(ADD, THUMB_ADDITION(cpu->gprs[rd], cpu->gprs[rn], cpu->gprs[rm]))
DEFINE_DATA_FORM_1_INSTRUCTION_THUMB(SUB, ARM_STUB)
#define DEFINE_DATA_FORM_2_INSTRUCTION_EX_THUMB(NAME, IMMEDIATE, BODY) \
@ -138,10 +146,7 @@ DEFINE_DATA_FORM_1_INSTRUCTION_THUMB(SUB, ARM_STUB)
#define DEFINE_DATA_FORM_2_INSTRUCTION_THUMB(NAME, BODY) \
COUNT_3(DEFINE_DATA_FORM_2_INSTRUCTION_EX_THUMB, NAME ## 1_, BODY)
DEFINE_DATA_FORM_2_INSTRUCTION_THUMB(ADD, \
int n = cpu->gprs[rn]; \
cpu->gprs[rd] = n + immediate; \
THUMB_ADDITION_S(n, immediate, cpu->gprs[rd]))
DEFINE_DATA_FORM_2_INSTRUCTION_THUMB(ADD, THUMB_ADDITION(cpu->gprs[rd], cpu->gprs[rn], immediate))
DEFINE_DATA_FORM_2_INSTRUCTION_THUMB(SUB, ARM_STUB)
@ -154,10 +159,8 @@ DEFINE_DATA_FORM_2_INSTRUCTION_THUMB(SUB, ARM_STUB)
#define DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(NAME, BODY) \
COUNT_3(DEFINE_DATA_FORM_3_INSTRUCTION_EX_THUMB, NAME ## _R, BODY)
DEFINE_DATA_FORM_3_INSTRUCTION_THUMB(ADD2, \
int d = cpu->gprs[rd]; \
cpu->gprs[rd] = d + immediate; \
THUMB_ADDITION_S(d, immediate, cpu->gprs[rd]))
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(MOV1, cpu->gprs[rd] = immediate; THUMB_NEUTRAL_S(, , cpu->gprs[rd]))