mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-14 23:30:06 +00:00
854e91bf6b
issignalingf is a very small function used in some areas where better performance (and smaller code) might be helpful. Create inline implementation for issignalingf. Reviewed-by: Joseph Myers <joseph@codesourcery.com>
169 lines
4.5 KiB
C
169 lines
4.5 KiB
C
#ifndef _MATH_H
|
|
|
|
#ifdef _ISOMAC
|
|
# undef NO_LONG_DOUBLE
|
|
#endif
|
|
|
|
#include <math/math.h>
|
|
|
|
#ifndef _ISOMAC
|
|
/* Now define the internal interfaces. */
|
|
extern int __signgam;
|
|
|
|
# if IS_IN (libc) || IS_IN (libm)
|
|
hidden_proto (__finite)
|
|
hidden_proto (__isinf)
|
|
hidden_proto (__isnan)
|
|
hidden_proto (__finitef)
|
|
hidden_proto (__isinff)
|
|
hidden_proto (__isnanf)
|
|
|
|
# ifndef __NO_LONG_DOUBLE_MATH
|
|
hidden_proto (__finitel)
|
|
hidden_proto (__isinfl)
|
|
hidden_proto (__isnanl)
|
|
# endif
|
|
|
|
# if __HAVE_DISTINCT_FLOAT128
|
|
hidden_proto (__finitef128)
|
|
hidden_proto (__isinff128)
|
|
hidden_proto (__isnanf128)
|
|
hidden_proto (__signbitf128)
|
|
# endif
|
|
# endif
|
|
|
|
libm_hidden_proto (__fpclassify)
|
|
libm_hidden_proto (__fpclassifyf)
|
|
libm_hidden_proto (__issignaling)
|
|
libm_hidden_proto (__issignalingf)
|
|
libm_hidden_proto (__exp)
|
|
libm_hidden_proto (__expf)
|
|
libm_hidden_proto (__roundeven)
|
|
|
|
# ifndef __NO_LONG_DOUBLE_MATH
|
|
libm_hidden_proto (__fpclassifyl)
|
|
libm_hidden_proto (__issignalingl)
|
|
libm_hidden_proto (__expl)
|
|
libm_hidden_proto (__expm1l)
|
|
# endif
|
|
|
|
# if __HAVE_DISTINCT_FLOAT128
|
|
libm_hidden_proto (__fpclassifyf128)
|
|
libm_hidden_proto (__issignalingf128)
|
|
libm_hidden_proto (__expf128)
|
|
libm_hidden_proto (__expm1f128)
|
|
# endif
|
|
|
|
#include <stdint.h>
|
|
#include <nan-high-order-bit.h>
|
|
|
|
/* A union which permits us to convert between a float and a 32 bit
|
|
int. */
|
|
|
|
typedef union
|
|
{
|
|
float value;
|
|
uint32_t word;
|
|
} ieee_float_shape_type;
|
|
|
|
/* Get a 32 bit int from a float. */
|
|
#ifndef GET_FLOAT_WORD
|
|
# define GET_FLOAT_WORD(i,d) \
|
|
do { \
|
|
ieee_float_shape_type gf_u; \
|
|
gf_u.value = (d); \
|
|
(i) = gf_u.word; \
|
|
} while (0)
|
|
#endif
|
|
|
|
/* Set a float from a 32 bit int. */
|
|
#ifndef SET_FLOAT_WORD
|
|
# define SET_FLOAT_WORD(d,i) \
|
|
do { \
|
|
ieee_float_shape_type sf_u; \
|
|
sf_u.word = (i); \
|
|
(d) = sf_u.value; \
|
|
} while (0)
|
|
#endif
|
|
|
|
extern inline int
|
|
__issignalingf (float x)
|
|
{
|
|
uint32_t xi;
|
|
GET_FLOAT_WORD (xi, x);
|
|
#if HIGH_ORDER_BIT_IS_SET_FOR_SNAN
|
|
/* We only have to care about the high-order bit of x's significand, because
|
|
having it set (sNaN) already makes the significand different from that
|
|
used to designate infinity. */
|
|
return (xi & 0x7fc00000) == 0x7fc00000;
|
|
#else
|
|
/* To keep the following comparison simple, toggle the quiet/signaling bit,
|
|
so that it is set for sNaNs. This is inverse to IEEE 754-2008 (as well as
|
|
common practice for IEEE 754-1985). */
|
|
xi ^= 0x00400000;
|
|
/* We have to compare for greater (instead of greater or equal), because x's
|
|
significand being all-zero designates infinity not NaN. */
|
|
return (xi & 0x7fffffff) > 0x7fc00000;
|
|
#endif
|
|
}
|
|
|
|
# if __HAVE_DISTINCT_FLOAT128
|
|
|
|
/* __builtin_isinf_sign is broken in GCC < 7 for float128. */
|
|
# if ! __GNUC_PREREQ (7, 0)
|
|
# include <ieee754_float128.h>
|
|
extern inline int
|
|
__isinff128 (_Float128 x)
|
|
{
|
|
int64_t hx, lx;
|
|
GET_FLOAT128_WORDS64 (hx, lx, x);
|
|
lx |= (hx & 0x7fffffffffffffffLL) ^ 0x7fff000000000000LL;
|
|
lx |= -lx;
|
|
return ~(lx >> 63) & (hx >> 62);
|
|
}
|
|
# endif
|
|
|
|
extern inline _Float128
|
|
fabsf128 (_Float128 x)
|
|
{
|
|
return __builtin_fabsf128 (x);
|
|
}
|
|
# endif
|
|
|
|
# if !(defined __FINITE_MATH_ONLY__ && __FINITE_MATH_ONLY__ > 0)
|
|
# ifndef NO_MATH_REDIRECT
|
|
/* Declare some functions for use within GLIBC. Compilers typically
|
|
inline those functions as a single instruction. Use an asm to
|
|
avoid use of PLTs if it doesn't. */
|
|
# define MATH_REDIRECT(FUNC, PREFIX, ARGS) \
|
|
float (FUNC ## f) (ARGS (float)) asm (PREFIX #FUNC "f"); \
|
|
double (FUNC) (ARGS (double)) asm (PREFIX #FUNC ); \
|
|
MATH_REDIRECT_LDBL (FUNC, PREFIX, ARGS) \
|
|
MATH_REDIRECT_F128 (FUNC, PREFIX, ARGS)
|
|
# ifdef __NO_LONG_DOUBLE_MATH
|
|
# define MATH_REDIRECT_LDBL(FUNC, PREFIX, ARGS)
|
|
# else
|
|
# define MATH_REDIRECT_LDBL(FUNC, PREFIX, ARGS) \
|
|
long double (FUNC ## l) (ARGS (long double)) asm (PREFIX #FUNC "l");
|
|
# endif
|
|
# if __HAVE_DISTINCT_FLOAT128
|
|
# define MATH_REDIRECT_F128(FUNC, PREFIX, ARGS) \
|
|
_Float128 (FUNC ## f128) (ARGS (_Float128)) asm (PREFIX #FUNC "f128");
|
|
# else
|
|
# define MATH_REDIRECT_F128(FUNC, PREFIX, ARGS)
|
|
# endif
|
|
# define MATH_REDIRECT_UNARY_ARGS(TYPE) TYPE
|
|
# define MATH_REDIRECT_BINARY_ARGS(TYPE) TYPE, TYPE
|
|
MATH_REDIRECT (sqrt, "__ieee754_", MATH_REDIRECT_UNARY_ARGS)
|
|
MATH_REDIRECT (ceil, "__", MATH_REDIRECT_UNARY_ARGS)
|
|
MATH_REDIRECT (floor, "__", MATH_REDIRECT_UNARY_ARGS)
|
|
MATH_REDIRECT (rint, "__", MATH_REDIRECT_UNARY_ARGS)
|
|
MATH_REDIRECT (trunc, "__", MATH_REDIRECT_UNARY_ARGS)
|
|
MATH_REDIRECT (round, "__", MATH_REDIRECT_UNARY_ARGS)
|
|
MATH_REDIRECT (copysign, "__", MATH_REDIRECT_BINARY_ARGS)
|
|
# endif
|
|
# endif
|
|
|
|
#endif
|
|
#endif
|