fenv.c File Reference

#include "cdefs-compat.h"
#include "types-compat.h"
#include "math_private.h"
#include "i387/bsd_npx.h"
#include <openlibm_fenv.h>

Include dependency graph for fenv.c:

Macros
#define	__fenv_static
#define	getfl(x)   __asm __volatile("pushfl\n\tpopl %0" : "=mr" (*(x)))
#define	setfl(x)   __asm __volatile("pushl %0\n\tpopfl" : : "g" (x))
#define	cpuid_dx(x)

Functions
int	__test_sse (void)
OLM_DLLEXPORT int	feclearexcept (int __excepts)
OLM_DLLEXPORT int	fegetexceptflag (fexcept_t *__flagp, int __excepts)
OLM_DLLEXPORT int	fesetexceptflag (const fexcept_t *flagp, int excepts)
OLM_DLLEXPORT int	feraiseexcept (int excepts)
OLM_DLLEXPORT int	fetestexcept (int __excepts)
OLM_DLLEXPORT int	fegetround (void)
OLM_DLLEXPORT int	fesetround (int __round)
int	fegetenv (fenv_t *envp)
int	feholdexcept (fenv_t *envp)
OLM_DLLEXPORT int	fesetenv (const fenv_t *__envp)
OLM_DLLEXPORT int	feupdateenv (const fenv_t *envp)
int	feenableexcept (int mask)
int	fedisableexcept (int mask)

Variables
const fenv_t	__fe_dfl_env
enum __sse_support	__has_sse

Macro Definition Documentation

__fenv_static

#define __fenv_static

cpuid_dx

#define cpuid_dx

(

x

)

Value:

__asm __volatile("pushl %%ebx\n\tmovl $1, %%eax\n\t"  \
                     "cpuid\n\tpopl %%ebx"            \
                    : "=d" (*(x)) : : "eax", "ecx")

getfl

#define getfl

(

x

)

__asm __volatile("pushfl\n\tpopl %0" : "=mr" (*(x)))

setfl

#define setfl

(

x

)

__asm __volatile("pushl %0\n\tpopfl" : : "g" (x))

Function Documentation

__test_sse()

int __test_sse

(

void

)

References __has_sse, __SSE_NO, __SSE_YES, cpuid_dx, getfl, and setfl.

feclearexcept()

OLM_DLLEXPORT int feclearexcept ( int  __excepts )

inline

fedisableexcept()

int fedisableexcept ( int  mask )

inline

References __fldcw, __fnstcw, __HAS_SSE, __ldmxcsr, __stmxcsr, _SSE_EMASK_SHIFT, and FE_ALL_EXCEPT.

feenableexcept()

int feenableexcept ( int  mask )

inline

References __fldcw, __fnstcw, __HAS_SSE, __ldmxcsr, __stmxcsr, _SSE_EMASK_SHIFT, and FE_ALL_EXCEPT.

fegetenv()

int fegetenv ( fenv_t *  envp )

inline

References fenv_t::__control, __fldcw, __fnstenv, __HAS_SSE, __set_mxcsr, and __stmxcsr.

fegetexceptflag()

OLM_DLLEXPORT int fegetexceptflag ( fexcept_t *  __flagp, int  __excepts  )

inline

fegetround()

OLM_DLLEXPORT int fegetround ( void  )

inline

feholdexcept()

int feholdexcept ( fenv_t *  envp )

inline

References __fnclex, __fnstenv, __HAS_SSE, __ldmxcsr, __set_mxcsr, __stmxcsr, _SSE_EMASK_SHIFT, and FE_ALL_EXCEPT.

feraiseexcept()

OLM_DLLEXPORT int feraiseexcept ( int  excepts )

inline

References __fwait, and fesetexceptflag().

fesetenv()

OLM_DLLEXPORT int fesetenv ( const fenv_t *  __envp )

inline

fesetexceptflag()

OLM_DLLEXPORT int fesetexceptflag ( const fexcept_t *  flagp, int  excepts  )

inline

References __fldenv, __fnstenv, __HAS_SSE, __ldmxcsr, fenv_t::__status, and __stmxcsr.

fesetround()

OLM_DLLEXPORT int fesetround ( int  __round )

inline

fetestexcept()

OLM_DLLEXPORT int fetestexcept ( int  __excepts )

inline

feupdateenv()

OLM_DLLEXPORT int feupdateenv ( const fenv_t *  envp )

inline

References __fnstsw, __HAS_SSE, __stmxcsr, FE_ALL_EXCEPT, feraiseexcept(), and fesetenv().

Variable Documentation

__fe_dfl_env

const fenv_t __fe_dfl_env

Initial value:

= {
    __INITIAL_NPXCW__,
    0x0000,
    0x0000,
    0x1f80,
    0xffffffff,
    { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
      0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff }
}

__has_sse

enum __sse_support __has_sse

Initial value:

=



    __SSE_UNK

Referenced by __test_sse().