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 #ifdef HAVE_FENV_H
  11     fenv_t flt_env;
  12 #ifdef _WIN32
  13     int round_mode;
  14 #endif
  15 #else
  16     int state;
  17 #endif
  18 #ifdef HAVE_SSE
  19     int sse_state;
  20 #endif
  21 } FPUCtl;
  22 void SetMixerFPUMode(FPUCtl *ctl);
  23 void RestoreFPUMode(const FPUCtl *ctl);
  24
  25 #ifdef __GNUC__
  26 /* Use an alternate macro set with GCC to avoid accidental continue or break
  27  * statements within the mixer mode.
  28  */
  29 #define START_MIXER_MODE() __extension__({ FPUCtl _oldMode; SetMixerFPUMode(&_oldMode)
  30 #define END_MIXER_MODE() RestoreFPUMode(&_oldMode); })
  31 #else
  32 #define START_MIXER_MODE() do { FPUCtl _oldMode; SetMixerFPUMode(&_oldMode)
  33 #define END_MIXER_MODE() RestoreFPUMode(&_oldMode); } while(0)
  34 #endif
  35 #define LEAVE_MIXER_MODE() RestoreFPUMode(&_oldMode)
  36
  37 #endif /* FPU_MODES_H */