gpu_neon: try to make the compiler save some callee-save regs

[pcsx_rearmed.git] / plugins / gpu_neon / psx_gpu_if.c

diff --git a/plugins/gpu_neon/psx_gpu_if.c b/plugins/gpu_neon/psx_gpu_if.c
index bb8bea0..353b603 100644 (file)
--- a/plugins/gpu_neon/psx_gpu_if.c
+++ b/plugins/gpu_neon/psx_gpu_if.c
@@ -31,11 +31,20 @@ int do_cmd_list(uint32_t *list, int count, int *last_cmd)
 {
   int ret;
 
+#if defined(__arm__) && defined(NEON_BUILD) && !defined(SIMD_BUILD)
+  // the asm doesn't bother to save callee-save vector regs, so do it here
+  __asm__ __volatile__("":::"q4","q5","q6","q7");
+#endif
+
   if (gpu.state.enhancement_active)
     ret = gpu_parse_enhanced(&egpu, list, count * 4, (u32 *)last_cmd);
   else
     ret = gpu_parse(&egpu, list, count * 4, (u32 *)last_cmd);
 
+#if defined(__arm__) && defined(NEON_BUILD) && !defined(SIMD_BUILD)
+  __asm__ __volatile__("":::"q4","q5","q6","q7");
+#endif
+
   ex_regs[1] &= ~0x1ff;
   ex_regs[1] |= egpu.texture_settings & 0x1ff;
   return ret;