diff options
Diffstat (limited to 'Alc/fpu_modes.h')
| -rw-r--r-- | Alc/fpu_modes.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Alc/fpu_modes.h b/Alc/fpu_modes.h new file mode 100644 index 00000000..eb305967 --- /dev/null +++ b/Alc/fpu_modes.h @@ -0,0 +1,34 @@ +#ifndef FPU_MODES_H +#define FPU_MODES_H + +#ifdef HAVE_FENV_H +#include <fenv.h> +#endif + + +typedef struct FPUCtl { +#if defined(__GNUC__) && defined(HAVE_SSE) + unsigned int sse_state; +#elif defined(HAVE___CONTROL87_2) + unsigned int state; + unsigned int sse_state; +#elif defined(HAVE__CONTROLFP) + unsigned int state; +#endif +} FPUCtl; +void SetMixerFPUMode(FPUCtl *ctl); +void RestoreFPUMode(const FPUCtl *ctl); + +#ifdef __GNUC__ +/* Use an alternate macro set with GCC to avoid accidental continue or break + * statements within the mixer mode. + */ +#define START_MIXER_MODE() __extension__({ FPUCtl _oldMode; SetMixerFPUMode(&_oldMode) +#define END_MIXER_MODE() RestoreFPUMode(&_oldMode); }) +#else +#define START_MIXER_MODE() do { FPUCtl _oldMode; SetMixerFPUMode(&_oldMode) +#define END_MIXER_MODE() RestoreFPUMode(&_oldMode); } while(0) +#endif +#define LEAVE_MIXER_MODE() RestoreFPUMode(&_oldMode) + +#endif /* FPU_MODES_H */ |