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Improved cycle counting for branches

This commit is contained in:
Jeffrey Pfau 2013-05-11 14:45:31 -07:00
parent f6592b17b8
commit 013e322c0b
2 changed files with 3 additions and 4 deletions
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6
src/arm/isa-inlines.h
View File

@ -68,14 +68,12 @@
#define ARM_WRITE_PC \
cpu->gprs[ARM_PC] = (cpu->gprs[ARM_PC] & -WORD_SIZE_ARM) + WORD_SIZE_ARM; \
cpu->memory->setActiveRegion(cpu->memory, cpu->gprs[ARM_PC]); \
cpu->memory->loadU16(cpu->memory, cpu->gprs[ARM_PC], &cpu->cycles); \
cpu->cycles += 2 + cpu->memory->activePrefetchCycles32;
cpu->cycles += 1 + cpu->memory->activePrefetchCycles32;
#define THUMB_WRITE_PC \
cpu->gprs[ARM_PC] = (cpu->gprs[ARM_PC] & -WORD_SIZE_THUMB) + WORD_SIZE_THUMB; \
cpu->memory->setActiveRegion(cpu->memory, cpu->gprs[ARM_PC]); \
cpu->memory->load32(cpu->memory, cpu->gprs[ARM_PC], &cpu->cycles); \
cpu->cycles += 2 + cpu->memory->activePrefetchCycles16;
cpu->cycles += 1 + cpu->memory->activePrefetchCycles16;
static inline int _ARMModeHasSPSR(enum PrivilegeMode mode) {
return mode != MODE_SYSTEM && mode != MODE_USER;

1
src/gba/gba-memory.c
View File

@ -109,6 +109,7 @@ static void GBASetActiveRegion(struct ARMMemory* memory, uint32_t address) {
memory->activeMask = 0;
break;
}
gbaMemory->p->cpu.cycles += 1 + (gbaMemory->p->cpu.executionMode == MODE_ARM ? gbaMemory->waitstates32[address >> BASE_OFFSET] : gbaMemory->waitstates16[address >> BASE_OFFSET]);
}
int32_t GBALoad32(struct ARMMemory* memory, uint32_t address, int* cycleCounter) {