ShuriZma
/
mgba
mirror of https://github.com/mgba-emu/mgba.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

GBA BIOS: Fix some regressions regarding signed 16-bit loads (fixes #196)

This commit is contained in:
Jeffrey Pfau 2015-02-21 10:58:24 -08:00
parent e742fe25d0
commit 01f7036401
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
src/gba/bios.c
View File

@ -129,8 +129,8 @@ static void _ObjAffineSet(struct GBA* gba) {
while (i--) {
// [ sx 0 ] [ cos(theta) -sin(theta) ] [ A B ]
// [ 0 sy ] * [ sin(theta) cos(theta) ] = [ C D ]
sx = cpu->memory.load16(cpu, offset, 0) / 256.f;
sy = cpu->memory.load16(cpu, offset + 2, 0) / 256.f;
sx = (int16_t) cpu->memory.load16(cpu, offset, 0) / 256.f;
sy = (int16_t) cpu->memory.load16(cpu, offset + 2, 0) / 256.f;
theta = (cpu->memory.load16(cpu, offset + 4, 0) >> 8) / 128.f * M_PI;
offset += 8;
// Rotation
@ -335,7 +335,7 @@ static void _unLz77(struct GBA* gba, int width) {
while (bytes-- && remaining) {
--remaining;
if (width == 2) {
byte = cpu->memory.load16(cpu, disp & ~1, 0);
byte = (int16_t) cpu->memory.load16(cpu, disp & ~1, 0);
if (dest & 1) {
byte >>= (disp & 1) * 8;
halfword |= byte << 8;