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b8682397ab
Bug 15384 notes that in __finite, two different constants are used that could be the same constant (the result only depends on the exponent of the floating-point representation), and that using the same constant is better for architectures where constants need loading from a constant pool. This patch implements that change. Tested for x86_64, mips64 and powerpc. [BZ #15384] * sysdeps/ieee754/dbl-64/s_finite.c (FINITE): Use same constant as bit-mask as in subtraction. * sysdeps/ieee754/dbl-64/wordsize-64/s_finite.c (__finite): Likewise. * sysdeps/ieee754/flt-32/s_finitef.c (FINITEF): Likewise. * sysdeps/ieee754/ldbl-128/s_finitel.c (__finitel): Likewise. * sysdeps/ieee754/ldbl-128ibm/s_finitel.c (__finitel): Likewise.
50 lines
1.2 KiB
C
50 lines
1.2 KiB
C
/* s_finitel.c -- long double version of s_finite.c.
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* Conversion to IEEE quad long double by Jakub Jelinek, jj@ultra.linux.cz.
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*/
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/*
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* ====================================================
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* Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved.
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*
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* Developed at SunPro, a Sun Microsystems, Inc. business.
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* Permission to use, copy, modify, and distribute this
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* software is freely granted, provided that this notice
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* is preserved.
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* ====================================================
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*/
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#if defined(LIBM_SCCS) && !defined(lint)
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static char rcsid[] = "$NetBSD: $";
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#endif
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/*
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* finitel(x) returns 1 is x is finite, 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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#include <math_ldbl_opt.h>
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int
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___finitel (long double x)
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{
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uint64_t hx;
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double xhi;
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xhi = ldbl_high (x);
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EXTRACT_WORDS64 (hx, xhi);
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hx &= 0x7ff0000000000000LL;
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hx -= 0x7ff0000000000000LL;
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return hx >> 63;
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}
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hidden_ver (___finitel, __finitel)
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weak_alias (___finitel, ____finitel)
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#if IS_IN (libm)
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long_double_symbol (libm, ____finitel, finitel);
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long_double_symbol (libm, ___finitel, __finitel);
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#else
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long_double_symbol (libc, ____finitel, finitel);
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long_double_symbol (libc, ___finitel, __finitel);
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#endif
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