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Merge "Clean up the ARM fenv.h, moving implementation details into fenv.c."

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Elliott Hughes 2014-06-09 21:16:14 +00:00 committed by Gerrit Code Review
commit 8c054c51c3
2 changed files with 14 additions and 18 deletions
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27
libm/arm/fenv.c
View File

@ -28,10 +28,11 @@
#include <fenv.h>
/*
* Hopefully the system ID byte is immutable, so it's valid to use
* this as a default environment.
*/
#define FPSCR_ENABLE_SHIFT 8
#define FPSCR_ENABLE_MASK (FE_ALL_EXCEPT << FPSCR_ENABLE_SHIFT)
#define FPSCR_RMODE_SHIFT 22
const fenv_t __fe_dfl_env = 0;
int fegetenv(fenv_t* __envp) {
@ -86,14 +87,14 @@ int fetestexcept(int __excepts) {
int fegetround(void) {
fenv_t _fpscr;
fegetenv(&_fpscr);
return ((_fpscr >> _FPSCR_RMODE_SHIFT) & 0x3);
return ((_fpscr >> FPSCR_RMODE_SHIFT) & 0x3);
}
int fesetround(int __round) {
fenv_t _fpscr;
fegetenv(&_fpscr);
_fpscr &= ~(0x3 << _FPSCR_RMODE_SHIFT);
_fpscr |= (__round << _FPSCR_RMODE_SHIFT);
_fpscr &= ~(0x3 << FPSCR_RMODE_SHIFT);
_fpscr |= (__round << FPSCR_RMODE_SHIFT);
fesetenv(&_fpscr);
return 0;
}
@ -102,7 +103,7 @@ int feholdexcept(fenv_t* __envp) {
fenv_t __env;
fegetenv(&__env);
*__envp = __env;
__env &= ~(FE_ALL_EXCEPT | _FPSCR_ENABLE_MASK);
__env &= ~(FE_ALL_EXCEPT | FPSCR_ENABLE_MASK);
fesetenv(&__env);
return 0;
}
@ -118,21 +119,21 @@ int feupdateenv(const fenv_t* __envp) {
int feenableexcept(int __mask) {
fenv_t __old_fpscr, __new_fpscr;
fegetenv(&__old_fpscr);
__new_fpscr = __old_fpscr | (__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT;
__new_fpscr = __old_fpscr | (__mask & FE_ALL_EXCEPT) << FPSCR_ENABLE_SHIFT;
fesetenv(&__new_fpscr);
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
return ((__old_fpscr >> FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
}
int fedisableexcept(int __mask) {
fenv_t __old_fpscr, __new_fpscr;
fegetenv(&__old_fpscr);
__new_fpscr = __old_fpscr & ~((__mask & FE_ALL_EXCEPT) << _FPSCR_ENABLE_SHIFT);
__new_fpscr = __old_fpscr & ~((__mask & FE_ALL_EXCEPT) << FPSCR_ENABLE_SHIFT);
fesetenv(&__new_fpscr);
return ((__old_fpscr >> _FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
return ((__old_fpscr >> FPSCR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
}
int fegetexcept(void) {
fenv_t __fpscr;
fegetenv(&__fpscr);
return ((__fpscr & _FPSCR_ENABLE_MASK) >> _FPSCR_ENABLE_SHIFT);
return ((__fpscr & FPSCR_ENABLE_MASK) >> FPSCR_ENABLE_SHIFT);
}

5
libm/include/arm/machine/fenv.h
View File

@ -52,17 +52,12 @@ typedef __uint32_t fexcept_t;
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | \
FE_OVERFLOW | FE_UNDERFLOW)
#define _FPSCR_ENABLE_SHIFT 8
#define _FPSCR_ENABLE_MASK (FE_ALL_EXCEPT << _FPSCR_ENABLE_SHIFT)
/* Rounding modes. */
#define FE_TONEAREST 0x0
#define FE_UPWARD 0x1
#define FE_DOWNWARD 0x2
#define FE_TOWARDZERO 0x3
#define _FPSCR_RMODE_SHIFT 22
__END_DECLS
#endif /* !_ARM_FENV_H_ */