Alc/fpu_modes.h

   1 #ifndef FPU_MODES_H
   2 #define FPU_MODES_H
   3
   4 #ifdef HAVE_FENV_H
   5 #include <fenv.h>
   6 #endif
   7
   8
   9 typedef struct FPUCtl {
  10 #if defined(__GNUC__) && defined(HAVE_SSE)
  11     unsigned int sse_state;
  12 #elif defined(HAVE___CONTROL87_2)
  13     unsigned int state;
  14     unsigned int sse_state;
  15 #elif defined(HAVE__CONTROLFP)
  16     unsigned int state;
  17 #endif
  18 } FPUCtl;
  19 void SetMixerFPUMode(FPUCtl *ctl);
  20 void RestoreFPUMode(const FPUCtl *ctl);
  21
  22 #ifdef __GNUC__
  23 /* Use an alternate macro set with GCC to avoid accidental continue or break
  24  * statements within the mixer mode.
  25  */
  26 #define START_MIXER_MODE() __extension__({ FPUCtl _oldMode; SetMixerFPUMode(&_oldMode)
  27 #define END_MIXER_MODE() RestoreFPUMode(&_oldMode); })
  28 #else
  29 #define START_MIXER_MODE() do { FPUCtl _oldMode; SetMixerFPUMode(&_oldMode)
  30 #define END_MIXER_MODE() RestoreFPUMode(&_oldMode); } while(0)
  31 #endif
  32 #define LEAVE_MIXER_MODE() RestoreFPUMode(&_oldMode)
  33
  34 #endif /* FPU_MODES_H */