Applied a patch by MrSunshine that adds modfl() - thanks!
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37904 a95241bf-73f2-0310-859d-f6bbb57e9c96
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/* s_modfl.c -- long double version of s_modf.c.
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* Conversion to long double by Ulrich Drepper,
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* Cygnus Support, drepper@cygnus.com.
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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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* modfl(long double x, long double *iptr)
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* return fraction part of x, and return x's integral part in *iptr.
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* Method:
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* Bit twiddling.
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*
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* Exception:
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* No exception.
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*/
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#include "math.h"
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#include "math_private.h"
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#ifdef __STDC__
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static const long double one = 1.0;
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#else
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static long double one = 1.0;
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#endif
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#ifdef __STDC__
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long double __modfl(long double x, long double *iptr)
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#else
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long double __modfl(x, iptr)
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long double x,*iptr;
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#endif
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{
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int32_t i0, i1, j0;
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u_int32_t i, se;
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GET_LDOUBLE_WORDS(se,i0,i1,x);
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j0 = (se & 0x7fff) - 0x3fff; /* exponent of x */
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if (j0 < 32) { /* integer part in high x */
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if (j0 < 0) { /* |x|<1 */
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SET_LDOUBLE_WORDS(*iptr,se&0x8000,0,0); /* *iptr = +-0 */
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return x;
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} else {
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i = (0x7fffffff) >> j0;
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if (((i0 & i) | i1) == 0) { /* x is integral */
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*iptr = x;
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SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */
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return x;
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} else {
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SET_LDOUBLE_WORDS(*iptr,se,i0&(~i),0);
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return x - *iptr;
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}
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}
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} else if (j0 > 63) { /* no fraction part */
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*iptr = x * one;
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/* We must handle NaNs separately. */
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if (j0 == 0x4000 && ((i0 & 0x7fffffff) | i1))
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return x * one;
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SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */
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return x;
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} else { /* fraction part in low x */
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i = ((u_int32_t) (0x7fffffff)) >> (j0 - 32);
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if ((i1 & i) == 0) { /* x is integral */
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*iptr = x;
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SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */
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return x;
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} else {
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SET_LDOUBLE_WORDS(*iptr,se,i0,i1&(~i));
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return x - *iptr;
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}
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}
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}
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weak_alias (__modfl, modfl)
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@ -61,7 +61,7 @@ local genericSources =
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s_llround.c s_llroundf.c s_llroundl.c
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s_lround.c s_lroundf.c s_lroundl.c
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s_matherr.c
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s_modf.c s_modff.c # s_modfl.c
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s_modf.c s_modff.c s_modfl.c
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s_nan.c s_nanf.c s_nanl.c
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s_nextafter.c s_nextafterf.c
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s_nexttowardl.c
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