f83af095b6
* 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.
35 lines
708 B
C
35 lines
708 B
C
/*
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* Written by J.T. Conklin <jtc@netbsd.org>.
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* Changed to return -1 for -Inf by Ulrich Drepper <drepper@cygnus.com>.
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* Public domain.
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: s_isinf.c,v 1.3 1995/05/11 23:20:14 jtc Exp $";
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#endif
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/*
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* isinf(x) returns 1 is x is inf, -1 if x is -inf, else 0;
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* no branching!
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*/
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#include "math.h"
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#include "math_private.h"
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int
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__isinf (double x)
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{
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int32_t hx,lx;
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EXTRACT_WORDS(hx,lx,x);
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lx |= (hx & 0x7fffffff) ^ 0x7ff00000;
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lx |= -lx;
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return ~(lx >> 31) & (hx >> 30);
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}
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INTDEF(__isinf)
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weak_alias (__isinf, isinf)
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#ifdef NO_LONG_DOUBLE
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strong_alias (__isinf, __isinfl)
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INTDEF(__isinfl)
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weak_alias (__isinf, isinfl)
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#endif
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