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Move mips fenv implementation details into fenv.c.

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Change-Id: I2415e4808e40c2981d016c01969ba14ea22bf82e
This commit is contained in:
Elliott Hughes 2014-06-09 14:33:39 -07:00
parent 8c054c51c3
commit 89d61243f2
2 changed files with 17 additions and 18 deletions
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7
libm/include/mips/machine/fenv.h
View file

@ -87,19 +87,12 @@ typedef __uint32_t fexcept_t;
#define FE_ALL_EXCEPT (FE_DIVBYZERO | FE_INEXACT | \
FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW)
#define _FCSR_CAUSE_SHIFT 10
#define _ENABLE_SHIFT 5
#define _FCSR_ENABLE_MASK (FE_ALL_EXCEPT << _ENABLE_SHIFT)
/* Rounding modes */
#define FE_TONEAREST 0x0000
#define FE_TOWARDZERO 0x0001
#define FE_UPWARD 0x0002
#define FE_DOWNWARD 0x0003
#define _FCSR_RMODE_SHIFT 0
#define _FCSR_RMASK 0x3
__END_DECLS
#endif /* !_MIPS_FENV_H_ */

28
libm/mips/fenv.c
View file

@ -28,6 +28,12 @@
#include <fenv.h>
#define FCSR_CAUSE_SHIFT 10
#define FCSR_ENABLE_SHIFT 5
#define FCSR_ENABLE_MASK (FE_ALL_EXCEPT << FCSR_ENABLE_SHIFT)
#define FCSR_RMASK 0x3
/*
* Hopefully the system ID byte is immutable, so it's valid to use
* this as a default environment.
@ -55,7 +61,7 @@ int feclearexcept(int __excepts) {
fexcept_t __fcsr;
fegetenv(&__fcsr);
__excepts &= FE_ALL_EXCEPT;
__fcsr &= ~(__excepts | (__excepts << _FCSR_CAUSE_SHIFT));
__fcsr &= ~(__excepts | (__excepts << FCSR_CAUSE_SHIFT));
fesetenv(&__fcsr);
return 0;
}
@ -84,7 +90,7 @@ int feraiseexcept(int __excepts) {
/* Ensure that flags are all legal */
__excepts &= FE_ALL_EXCEPT;
/* Cause bit needs to be set as well for generating the exception*/
__fcsr |= __excepts | (__excepts << _FCSR_CAUSE_SHIFT);
__fcsr |= __excepts | (__excepts << FCSR_CAUSE_SHIFT);
fesetenv(&__fcsr);
return 0;
}
@ -98,14 +104,14 @@ int fetestexcept(int __excepts) {
int fegetround(void) {
fenv_t _fcsr;
fegetenv(&_fcsr);
return (_fcsr & _FCSR_RMASK);
return (_fcsr & FCSR_RMASK);
}
int fesetround(int __round) {
fenv_t _fcsr;
fegetenv(&_fcsr);
_fcsr &= ~_FCSR_RMASK;
_fcsr |= (__round & _FCSR_RMASK ) ;
_fcsr &= ~FCSR_RMASK;
_fcsr |= (__round & FCSR_RMASK);
fesetenv(&_fcsr);
return 0;
}
@ -114,7 +120,7 @@ int feholdexcept(fenv_t* __envp) {
fenv_t __env;
fegetenv(&__env);
*__envp = __env;
__env &= ~(FE_ALL_EXCEPT | _FCSR_ENABLE_MASK);
__env &= ~(FE_ALL_EXCEPT | FCSR_ENABLE_MASK);
fesetenv(&__env);
return 0;
}
@ -130,21 +136,21 @@ int feupdateenv(const fenv_t* __envp) {
int feenableexcept(int __mask) {
fenv_t __old_fcsr, __new_fcsr;
fegetenv(&__old_fcsr);
__new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT;
__new_fcsr = __old_fcsr | (__mask & FE_ALL_EXCEPT) << FCSR_ENABLE_SHIFT;
fesetenv(&__new_fcsr);
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
return ((__old_fcsr >> FCSR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
}
int fedisableexcept(int __mask) {
fenv_t __old_fcsr, __new_fcsr;
fegetenv(&__old_fcsr);
__new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << _ENABLE_SHIFT);
__new_fcsr = __old_fcsr & ~((__mask & FE_ALL_EXCEPT) << FCSR_ENABLE_SHIFT);
fesetenv(&__new_fcsr);
return ((__old_fcsr >> _ENABLE_SHIFT) & FE_ALL_EXCEPT);
return ((__old_fcsr >> FCSR_ENABLE_SHIFT) & FE_ALL_EXCEPT);
}
int fegetexcept(void) {
fenv_t __fcsr;
fegetenv(&__fcsr);
return ((__fcsr & _FCSR_ENABLE_MASK) >> _ENABLE_SHIFT);
return ((__fcsr & FCSR_ENABLE_MASK) >> FCSR_ENABLE_SHIFT);
}