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GBA BIOS: Fix ArcTan sign in HLE BIOS

This commit is contained in:
Vicki Pfau 2017-04-20 17:53:01 -07:00
parent 997ba3572b
commit c9d411a762
2 changed files with 3 additions and 2 deletions
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1
CHANGES
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@ -38,6 +38,7 @@ Bugfixes:
- GB: Fix flickering when screen is strobed quickly
- FFmpeg: Fix overflow and general issues with audio encoding
- Qt: Fix crash when changing audio settings after a game is closed
- GBA BIOS: Fix ArcTan sign in HLE BIOS
Misc:
- SDL: Remove scancode key input
- GBA Video: Clean up unused timers

4
src/gba/bios.c
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@ -271,7 +271,7 @@ static void _Div(struct GBA* gba, int32_t num, int32_t denom) {
}
}
static int16_t _ArcTan(int16_t i) {
static int16_t _ArcTan(int32_t i) {
int32_t a = -((i * i) >> 14);
int32_t b = ((0xA9 * a) >> 14) + 0x390;
b = ((b * a) >> 14) + 0x91C;
@ -356,7 +356,7 @@ void GBASwi16(struct ARMCore* cpu, int immediate) {
cpu->gprs[0] = sqrt((uint32_t) cpu->gprs[0]);
break;
case 0x9:
cpu->gprs[0] = (uint16_t) _ArcTan(cpu->gprs[0]);
cpu->gprs[0] = _ArcTan(cpu->gprs[0]);
break;
case 0xA:
cpu->gprs[0] = (uint16_t) _ArcTan2(cpu->gprs[0], cpu->gprs[1]);