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Add isinf optimized for 64-bit.

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Ulrich Drepper 2009-08-26 00:51:45 -07:00
parent 15e7f0a44d
commit 2df4be8c35
2 changed files with 32 additions and 0 deletions
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ChangeLog
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2009-08-26 Ulrich Drepper <drepper@redhat.com>
* sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c: New file.
* sysdeps/ieee754/dbl-64/wordsize-64/s_isnan.c: New file.
2009-08-25 Ulrich Drepper <drepper@redhat.com>

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sysdeps/ieee754/dbl-64/wordsize-64/s_isinf.c Normal file
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/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Changed to return -1 for -Inf by Ulrich Drepper <drepper@cygnus.com>.
* Public domain.
*/
/*
* isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
int
__isinf (double x)
{
int64_t ix;
EXTRACT_WORDS64(ix,x);
int64_t t = ix & UINT64_C(0x7fffffffffffffff);
t ^= UINT64_C(0x7ff0000000000000);
t |= -t;
return ~(t >> 63) & (ix >> 62);
}
hidden_def (__isinf)
weak_alias (__isinf, isinf)
#ifdef NO_LONG_DOUBLE
strong_alias (__isinf, __isinfl)
weak_alias (__isinf, isinfl)
#endif