From: notaz Date: Sat, 29 Jun 2024 22:48:22 +0000 (+0300) Subject: gpu_neon: fix sign extension X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1fea3be9aa7061f82f0c7d1ba3ae693027444263;p=pcsx_rearmed.git gpu_neon: fix sign extension unclear why it's added differently from sprites, might need to revisit libretro/pcsx_rearmed#833 --- diff --git a/plugins/gpu_neon/psx_gpu/psx_gpu_parse.c b/plugins/gpu_neon/psx_gpu/psx_gpu_parse.c index d81b7078..53f33e4c 100644 --- a/plugins/gpu_neon/psx_gpu/psx_gpu_parse.c +++ b/plugins/gpu_neon/psx_gpu/psx_gpu_parse.c @@ -200,21 +200,14 @@ static void do_fill(psx_gpu_struct *psx_gpu, u32 x, u32 y, } } -#define sign_extend_12bit(value) \ - (((s32)((value) << 20)) >> 20) \ - #define sign_extend_11bit(value) \ (((s32)((value) << 21)) >> 21) \ -#define sign_extend_10bit(value) \ - (((s32)((value) << 22)) >> 22) \ - - #define get_vertex_data_xy(vertex_number, offset16) \ vertexes[vertex_number].x = \ - sign_extend_12bit(list_s16[offset16]) + psx_gpu->offset_x; \ + sign_extend_11bit(list_s16[offset16]) + psx_gpu->offset_x; \ vertexes[vertex_number].y = \ - sign_extend_12bit(list_s16[(offset16) + 1]) + psx_gpu->offset_y; \ + sign_extend_11bit(list_s16[(offset16) + 1]) + psx_gpu->offset_y; \ #define get_vertex_data_uv(vertex_number, offset16) \ vertexes[vertex_number].u = list_s16[offset16] & 0xFF; \ @@ -1746,10 +1739,8 @@ u32 gpu_parse_enhanced(psx_gpu_struct *psx_gpu, u32 *list, u32 size, case 0xE5: { - s32 offset_x = list[0] << 21; - s32 offset_y = list[0] << 10; - psx_gpu->offset_x = offset_x >> 21; - psx_gpu->offset_y = offset_y >> 21; + psx_gpu->offset_x = sign_extend_11bit(list[0]); + psx_gpu->offset_y = sign_extend_11bit(list[0] >> 11); SET_Ex(5, list[0]); break;