glibc/sysdeps/i386/fpu/s_isinfl.c
Ulrich Drepper f83af095b6 Update.
* include/math.h: Declare __isinf_internal, __isinfl_internal,
	__isnan_internal, and __isnanl_internal.
	* stdio-common/printf_fp.c: Use INTUSE for calls to __isinf, __isinfl,
	__isnan, and __isnanl.
	* stdio-common/printf_size.c: Likewise.
	* sysdeps/generic/printf_fphex.c: Likewise.
	* sysdeps/i386/fpu/s_isinfl.c: Also define _internal alias.
	* sysdeps/i386/fpu/s_isnanl.c: Likewise.
	* sysdeps/ia64/fpu/s_isinf.S: Likewise.
	* sysdeps/ia64/fpu/s_isnan.S: Likewise.
	* sysdeps/ieee754/dbl-64/s_isinf.c: Likewise.
	* sysdeps/ieee754/dbl-64/s_isnan.c: Likewise.
	* sysdeps/ieee754/flt-32/s_isinff.c: Likewise.
	* sysdeps/ieee754/flt-32/s_isnanf.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_isinfl.c: Likewise.
	* sysdeps/ieee754/ldbl-128/s_isnanl.c: Likewise.
	* sysdeps/ieee754/ldbl-96/s_isinfl.c: Likewise.
	* sysdeps/m68k/s_isinfl.c: Likewise.
	* sysdeps/m68k/fpu/s_isinf.c: Likewise.
	* sysdeps/powerpc/fpu/s_isnan.c: Likewise.
2002-04-14 17:55:43 +00:00

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C

/*
* Written by J.T. Conklin <jtc@netbsd.org>.
* Change for long double by Ulrich Drepper <drepper@cygnus.com>.
* Intel i387 specific version.
* Public domain.
*/
#if defined(LIBM_SCCS) && !defined(lint)
static char rcsid[] = "$NetBSD: $";
#endif
/*
* isinfl(x) returns 1 if x is inf, -1 if x is -inf, else 0;
* no branching!
*/
#include "math.h"
#include "math_private.h"
#ifdef __STDC__
int __isinfl(long double x)
#else
int __isinfl(x)
long double x;
#endif
{
int32_t se,hx,lx;
GET_LDOUBLE_WORDS(se,hx,lx,x);
/* This additional ^ 0x80000000 is necessary because in Intel's
internal representation of the implicit one is explicit. */
lx |= (hx ^ 0x80000000) | ((se & 0x7fff) ^ 0x7fff);
lx |= -lx;
se &= 0x8000;
return ~(lx >> 31) & (1 - (se >> 14));
}
INTDEF(__isinfl)
weak_alias (__isinfl, isinfl)