Page MenuHomeFreeBSD
Differential D34797 Diff 104915 sys/x86/include/x86_ieeefp.h

Changeset View

Standalone View

View Options

sys/x86/include/x86_ieeefp.h

Show First 20 Lines • Show All 102 Lines • ▼ Show 20 Lines
#define FP_PRC_OFF 8 /* precision control offset */ #define FP_PRC_OFF 8 /* precision control offset */
#define FP_RND_OFF 10 /* rounding control offset */ #define FP_RND_OFF 10 /* rounding control offset */
/* /*
* FPU status word bit-field offsets (shift counts). * FPU status word bit-field offsets (shift counts).
*/ */
#define FP_STKY_OFF 0 /* sticky flags offset */ #define FP_STKY_OFF 0 /* sticky flags offset */
#ifdef __GNUCLIKE_ASM
#define __fldcw(addr) __asm __volatile("fldcw %0" : : "m" (*(addr))) #define __fldcw(addr) __asm __volatile("fldcw %0" : : "m" (*(addr)))
#define __fldenv(addr) __asm __volatile("fldenv %0" : : "m" (*(addr))) #define __fldenv(addr) __asm __volatile("fldenv %0" : : "m" (*(addr)))
#define __fnclex() __asm __volatile("fnclex") #define __fnclex() __asm __volatile("fnclex")
#define __fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr))) #define __fnstcw(addr) __asm __volatile("fnstcw %0" : "=m" (*(addr)))
#define __fnstenv(addr) __asm __volatile("fnstenv %0" : "=m" (*(addr))) #define __fnstenv(addr) __asm __volatile("fnstenv %0" : "=m" (*(addr)))
#define __fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr))) #define __fnstsw(addr) __asm __volatile("fnstsw %0" : "=m" (*(addr)))
#define __ldmxcsr(addr) __asm __volatile("ldmxcsr %0" : : "m" (*(addr))) #define __ldmxcsr(addr) __asm __volatile("ldmxcsr %0" : : "m" (*(addr)))
#define __stmxcsr(addr) __asm __volatile("stmxcsr %0" : "=m" (*(addr))) #define __stmxcsr(addr) __asm __volatile("stmxcsr %0" : "=m" (*(addr)))
Show All 20 Lines if (((_sw & ~_cw) & FP_STKY_FLD) != 0) {
__fnstenv(&_env); __fnstenv(&_env);
_env._cw = _newcw; _env._cw = _newcw;
__fldenv(&_env); __fldenv(&_env);
return; return;
} }
} }
__fldcw(&_newcw); __fldcw(&_newcw);
} }
#endif /* __GNUCLIKE_ASM */
#endif/* _X86_X86_IEEEFP_H_ */ #endif/* _X86_X86_IEEEFP_H_ */