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Log division by zero

This commit is contained in:
Jeffrey Pfau 2014-10-23 01:45:32 -07:00
parent 768316a8d3
commit 61915939b5
1 changed files with 5 additions and 3 deletions
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8
src/gba/gba-bios.c
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@ -99,13 +99,15 @@ static void _MidiKey2Freq(struct GBA* gba) {
cpu->gprs[0] = key / powf(2, (180.f - cpu->gprs[1] - cpu->gprs[2] / 256.f) / 12.f); cpu->gprs[0] = key / powf(2, (180.f - cpu->gprs[1] - cpu->gprs[2] / 256.f) / 12.f);
} }
static void _Div(struct ARMCore* cpu, int32_t num, int32_t denom) { static void _Div(struct GBA* gba, int32_t num, int32_t denom) {
struct ARMCore* cpu = gba->cpu;
if (denom != 0) { if (denom != 0) {
div_t result = div(num, denom); div_t result = div(num, denom);
cpu->gprs[0] = result.quot; cpu->gprs[0] = result.quot;
cpu->gprs[1] = result.rem; cpu->gprs[1] = result.rem;
cpu->gprs[3] = abs(result.quot); cpu->gprs[3] = abs(result.quot);
} else { } else {
GBALog(gba, GBA_LOG_GAME_ERROR, "Attempting to divide %i by zero!", num);
// If abs(num) > 1, this should hang, but that would be painful to // If abs(num) > 1, this should hang, but that would be painful to
// emulate in HLE, and no game will get into a state where it hangs... // emulate in HLE, and no game will get into a state where it hangs...
cpu->gprs[0] = (num < 0) ? -1 : 1; cpu->gprs[0] = (num < 0) ? -1 : 1;
@ -138,10 +140,10 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
ARMRaiseSWI(cpu); ARMRaiseSWI(cpu);
break; break;
case 0x6: case 0x6:
_Div(cpu, cpu->gprs[0], cpu->gprs[1]); _Div(gba, cpu->gprs[0], cpu->gprs[1]);
break; break;
case 0x7: case 0x7:
_Div(cpu, cpu->gprs[1], cpu->gprs[0]); _Div(gba, cpu->gprs[1], cpu->gprs[0]);
break; break;
case 0x8: case 0x8:
cpu->gprs[0] = sqrt(cpu->gprs[0]); cpu->gprs[0] = sqrt(cpu->gprs[0]);