From 28bedeb547764381c3deaee52cf747f7c6c2647d Mon Sep 17 00:00:00 2001 From: Oliver Tappe Date: Wed, 4 Aug 2010 15:46:33 +0000 Subject: [PATCH] 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 --- .../posix/glibc/arch/generic/s_modfl.c | 86 +++++++++++++++++++ .../libroot/posix/glibc/arch/x86/Jamfile | 2 +- 2 files changed, 87 insertions(+), 1 deletion(-) create mode 100644 src/system/libroot/posix/glibc/arch/generic/s_modfl.c diff --git a/src/system/libroot/posix/glibc/arch/generic/s_modfl.c b/src/system/libroot/posix/glibc/arch/generic/s_modfl.c new file mode 100644 index 0000000000..1b6b3dc682 --- /dev/null +++ b/src/system/libroot/posix/glibc/arch/generic/s_modfl.c @@ -0,0 +1,86 @@ +/* s_modfl.c -- long double version of s_modf.c. + * Conversion to long double by Ulrich Drepper, + * Cygnus Support, drepper@cygnus.com. + */ + +/* + * ==================================================== + * Copyright (C) 1993 by Sun Microsystems, Inc. All rights reserved. + * + * Developed at SunPro, a Sun Microsystems, Inc. business. + * Permission to use, copy, modify, and distribute this + * software is freely granted, provided that this notice + * is preserved. + * ==================================================== + */ + +#if defined(LIBM_SCCS) && !defined(lint) +static char rcsid[] = "$NetBSD: $"; +#endif + +/* + * modfl(long double x, long double *iptr) + * return fraction part of x, and return x's integral part in *iptr. + * Method: + * Bit twiddling. + * + * Exception: + * No exception. + */ + +#include "math.h" +#include "math_private.h" + +#ifdef __STDC__ +static const long double one = 1.0; +#else +static long double one = 1.0; +#endif + +#ifdef __STDC__ + long double __modfl(long double x, long double *iptr) +#else + long double __modfl(x, iptr) + long double x,*iptr; +#endif +{ + int32_t i0, i1, j0; + u_int32_t i, se; + GET_LDOUBLE_WORDS(se,i0,i1,x); + j0 = (se & 0x7fff) - 0x3fff; /* exponent of x */ + if (j0 < 32) { /* integer part in high x */ + if (j0 < 0) { /* |x|<1 */ + SET_LDOUBLE_WORDS(*iptr,se&0x8000,0,0); /* *iptr = +-0 */ + return x; + } else { + i = (0x7fffffff) >> j0; + if (((i0 & i) | i1) == 0) { /* x is integral */ + *iptr = x; + SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */ + return x; + } else { + SET_LDOUBLE_WORDS(*iptr,se,i0&(~i),0); + return x - *iptr; + } + } + } else if (j0 > 63) { /* no fraction part */ + *iptr = x * one; + /* We must handle NaNs separately. */ + if (j0 == 0x4000 && ((i0 & 0x7fffffff) | i1)) + return x * one; + SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */ + return x; + } else { /* fraction part in low x */ + i = ((u_int32_t) (0x7fffffff)) >> (j0 - 32); + if ((i1 & i) == 0) { /* x is integral */ + *iptr = x; + SET_LDOUBLE_WORDS(x,se&0x8000,0,0); /* return +-0 */ + return x; + } else { + SET_LDOUBLE_WORDS(*iptr,se,i0,i1&(~i)); + return x - *iptr; + } + } +} +weak_alias (__modfl, modfl) + diff --git a/src/system/libroot/posix/glibc/arch/x86/Jamfile b/src/system/libroot/posix/glibc/arch/x86/Jamfile index e3e3958006..0630d602ea 100644 --- a/src/system/libroot/posix/glibc/arch/x86/Jamfile +++ b/src/system/libroot/posix/glibc/arch/x86/Jamfile @@ -61,7 +61,7 @@ local genericSources = s_llround.c s_llroundf.c s_llroundl.c s_lround.c s_lroundf.c s_lroundl.c s_matherr.c - s_modf.c s_modff.c # s_modfl.c + s_modf.c s_modff.c s_modfl.c s_nan.c s_nanf.c s_nanl.c s_nextafter.c s_nextafterf.c s_nexttowardl.c