| 1 | /* s_fabsl.c -- long double version of s_fabs.c. |
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| 2 | */ |
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| 3 | |
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| 4 | /* |
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| 5 | * ==================================================== |
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| 6 | * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. |
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| 7 | * |
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| 8 | * Developed at SunPro, a Sun Microsystems, Inc. business. |
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| 9 | * Permission to use, copy, modify, and distribute this |
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| 10 | * software is freely granted, provided that this notice |
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| 11 | * is preserved. |
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| 12 | * ==================================================== |
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| 13 | */ |
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| 14 | |
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| 15 | #if defined(LIBM_SCCS) && !defined(lint) |
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| 16 | static char rcsid[] = "$NetBSD: $" ; |
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| 17 | #endif |
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| 18 | |
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| 19 | |
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| 20 | /* |
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| 21 | * fabsl(x) returns the absolute value of x. |
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| 22 | */ |
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| 23 | |
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| 24 | #include <math.h> |
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| 25 | #include <math_private.h> |
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| 26 | #include <math_ldbl_opt.h> |
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| 27 | #include <math-use-builtins.h> |
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| 28 | |
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| 29 | long double __fabsl(long double x) |
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| 30 | { |
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| 31 | #if USE_FABSL_BUILTIN |
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| 32 | return __builtin_fabsl (x); |
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| 33 | #else |
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| 34 | uint64_t hx, lx; |
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| 35 | double xhi, xlo; |
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| 36 | |
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| 37 | ldbl_unpack (x, &xhi, &xlo); |
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| 38 | EXTRACT_WORDS64 (hx, xhi); |
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| 39 | EXTRACT_WORDS64 (lx, xlo); |
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| 40 | lx = lx ^ ( hx & 0x8000000000000000LL ); |
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| 41 | hx = hx & 0x7fffffffffffffffLL; |
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| 42 | INSERT_WORDS64 (xhi, hx); |
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| 43 | INSERT_WORDS64 (xlo, lx); |
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| 44 | x = ldbl_pack (xhi, xlo); |
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| 45 | return x; |
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| 46 | #endif |
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| 47 | } |
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| 48 | long_double_symbol (libm, __fabsl, fabsl); |
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| 49 | |
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