gpulib: avoid unaligned read

we still support arm9 and such

diff --git a/plugins/gpulib/gpu.c b/plugins/gpulib/gpu.c
index 3318549..83ec764 100644 (file)
--- a/plugins/gpulib/gpu.c
+++ b/plugins/gpulib/gpu.c
@@ -505,9 +505,10 @@ static noinline void start_vram_transfer(struct psx_gpu *gpu, uint32_t pos_word,
 
   renderer_flush_queues();
   if (is_read) {
+    const uint16_t *mem = VRAM_MEM_XY(gpu->vram, gpu->dma.x, gpu->dma.y);
     gpu->status |= PSX_GPU_STATUS_IMG;
     // XXX: wrong for width 1
-    gpu->gp0 = LE32TOH(*(uint32_t *) VRAM_MEM_XY(gpu->vram, gpu->dma.x, gpu->dma.y));
+    gpu->gp0 = LE16TOH(mem[0]) | ((uint32_t)LE16TOH(mem[1]) << 16);
     gpu->state.last_vram_read_frame = *gpu->state.frame_count;
   }