49 lines
1.1 KiB
C
49 lines
1.1 KiB
C
/* s_fabsl.c -- long double version of s_fabs.c.
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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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* fabsl(x) returns the absolute value of x.
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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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#include <math-use-builtins.h>
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long double __fabsl(long double x)
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{
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#if USE_FABSL_BUILTIN
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return __builtin_fabsl (x);
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#else
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uint64_t hx, lx;
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double xhi, xlo;
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ldbl_unpack (x, &xhi, &xlo);
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EXTRACT_WORDS64 (hx, xhi);
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EXTRACT_WORDS64 (lx, xlo);
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lx = lx ^ ( hx & 0x8000000000000000LL );
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hx = hx & 0x7fffffffffffffffLL;
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INSERT_WORDS64 (xhi, hx);
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INSERT_WORDS64 (xlo, lx);
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x = ldbl_pack (xhi, xlo);
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return x;
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#endif
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}
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long_double_symbol (libm, __fabsl, fabsl);
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