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Floating point support functions

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This commit is contained in:
Erik van der Kouwe
2009-12-24 20:22:41 +00:00
parent 5e9a8f05ff
commit 6dc5d42798
33 changed files with 970 additions and 8 deletions
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include/fenv.h
+21
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@@ -0,0 +1,21 @@
#ifndef _FENV_H
#define _FENV_H
#include <stdint.h>
#define FE_TONEAREST 1
#define FE_DOWNWARD 2
#define FE_UPWARD 3
#define FE_TOWARDZERO 4
typedef struct
{
u16_t cw;
u16_t sw;
} fenv_t;
int feholdexcept(fenv_t *envp);
int fegetround(void);
int fesetround(int round);
#endif
include/math.h
+27 -3
View File
@@ -7,11 +7,13 @@
#include <ansi.h>
#endif
#define HUGE_VAL (__huge_val()) /* may be infinity */
#define INFINITY (__infinity())
#define NAN (__qnan())
#define HUGE_VAL INFINITY
/* Function Prototypes. */
_PROTOTYPE( double __huge_val, (void) );
_PROTOTYPE( int __IsNan, (double _x) );
_PROTOTYPE( double __infinity, (void) );
_PROTOTYPE( double __qnan, (void) );
_PROTOTYPE( double acos, (double _x) );
_PROTOTYPE( double asin, (double _x) );
@@ -40,6 +42,28 @@ _PROTOTYPE( double hypot, (double _x, double _y) );
#ifdef _POSIX_SOURCE /* STD-C? */
#include <mathconst.h>
#define FP_INFINITE 1
#define FP_NAN 2
#define FP_NORMAL 3
#define FP_SUBNORMAL 4
#define FP_ZERO 5
_PROTOTYPE( int fpclassify, (double x) );
_PROTOTYPE( int isfinite, (double x) );
_PROTOTYPE( int isinf, (double x) );
_PROTOTYPE( int isnan, (double x) );
_PROTOTYPE( int isnormal, (double x) );
_PROTOTYPE( int signbit, (double x) );
_PROTOTYPE( int isgreater, (double x, double y) );
_PROTOTYPE( int isgreaterequal, (double x, double y) );
_PROTOTYPE( int isless, (double x, double y) );
_PROTOTYPE( int islessequal, (double x, double y) );
_PROTOTYPE( int islessgreater, (double x, double y) );
_PROTOTYPE( int isunordered, (double x, double y) );
_PROTOTYPE( double nearbyint, (double x) );
_PROTOTYPE( double remainder, (double x, double y) );
_PROTOTYPE( double trunc, (double x) );
#endif
#endif /* _MATH_H */