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authorRoland McGrath <roland@gnu.org>1996-05-30 16:12:42 +0000
committerRoland McGrath <roland@gnu.org>1996-05-30 16:12:42 +0000
commit76060ec0b8b5d6f0a860a94f100dc6e48041bac3 (patch)
treeb4ff1b5370a30a16705239598cb8e98f4b80b9ca /sysdeps/libm-ieee754/s_nextafterl.c
parentc3352e623384fe221743a6d2212c17d9619041ef (diff)
downloadglibc-76060ec0b8b5d6f0a860a94f100dc6e48041bac3.tar.gz
Thu May 30 11:24:05 1996 Roland McGrath <roland@delasyd.gnu.ai.mit.edu>cvs/libc-960602cvs/libc-960601cvs/libc-960531
* po/header.pot: Replace with exact boilerplate pinard dictates. * sysdeps/i386/strtok.S (Lillegal_argument): Remove this code to set errno and the check that jumped to it. * sysdeps/mach/hurd/Makefile (errnos.d): Use $(sed-remove-objpfx). Thu May 30 03:21:57 1996 Ulrich Drepper <drepper@cygnus.com> * FAQ: Document need of gperf program for developers. * elf/elf.h: Fix typos in comments. * libio/stdio.h [!__STRICT_ANSI__ || _POSIX_SOURCE]: Add prototypes for `ctermid' and `cuserid'. * locale/programs/locale.c: Switch to user selected locale before printing variables. * math/Makefile [$(long-double-fcts)==yes]: Define long-m-routines and long-c-routines. Only if the `long double' data type is available we need to compile the functions. (libm-routines): Add $(long-m-routines). (routines): Remove isinfl, isnanl. Use new file s_isinfl and s_isnanl instead if `long double' is available. * math/math.h: Include <mathcalls.h> again to define `long double' functions. * math/math_private.h: Define data types, prototypes and access macros for `long double'. * stdlib/stdlib.h: Add prototypes for `strtoll' and `strtoull'. [GCC2 && OPTIMIZE]: Define strto{,u}ll as inline function which calls __strto{,u}q_internal. * stdlib/strfmon.c: Replace PTR by `void *'. * stdlib/strtoq.c: Define strtoll as weak alias. * stdlib/strtouq.c: Define strtoull as weak alias. * string/tester.c: Correct `strsep' test. * sysdeps/generic/strsep.c: Make compatible with BSD version. Trailing characters of skip set are not skipped. In this case empty tokens are returned. * sysdeps/i386/isinfl.c, sysdeps/i386/isnanl.c, sysdeps/ieee754/isinf.c, sysdeps/ieee754/isinfl.c, sysdeps/ieee754/isnan.c, sysdeps/ieee754/isnanl.c: Removed. We now use the versions part of libm. * sysdeps/i386/strsep.S: Removed. Generic C version is of similar speed. * sysdeps/i386/strtok.S: Remove support for `strsep'. * sysdeps/libm-i387/e_acosl.S, sysdeps/libm-i387/s_ceill.S, sysdeps/libm-i387/s_copysignl.S, sysdeps/libm-i387/s_finitel.S, sysdeps/libm-i387/s_floorl.S, sysdeps/libm-i387/s_isinfl.c, sysdeps/libm-i387/s_isnanl.c, sysdeps/libm-i387/s_nextafterl.c, sysdeps/libm-i387/s_rintl.S, sysdeps/libm-i387/s_significandl.S: New i387 specific math functions implementing `long double' versions. * sysdeps/libm-ieee754/s_ceill.c, sysdeps/libm-ieee754/s_copysignl.c, sysdeps/libm-ieee754/s_fabsl.c, sysdeps/libm-ieee754/s_finitel.c, sysdeps/libm-ieee754/s_floorl.c, sysdeps/libm-ieee754/s_isinfl.c, sysdeps/libm-ieee754/s_isnanl.c, sysdeps/libm-ieee754/s_nextafterl.c, sysdeps/libm-ieee754/s_rintl.c, sysdeps/libm-ieee754/s_scalbnl.c, sysdeps/libm-ieee754/s_significandl.c: New generic `long double' versions of libm functions. * sysdeps/libm-i387/e_exp.S: Add a few comments to explain the Intel FPU nonsense. * sysdeps/libm-i387/s_ceil.S, sysdeps/libm-i387/s_ceilf.S, sysdeps/libm-i387/s_floor.S, sysdeps/libm-i387/s_floorf.S: Correct handling of local variables. The old version created a stack frame but stored the values outside. * sysdeps/libm-ieee754/s_isinf.c, sysdeps/libm-ieee754/s_isnan.c [!NO_LONG_DOUBLE]: Define alias with `long double' versions name. * login/pututline_r.c: Include sys/stat.h. Fix typos. according to currently used locale for category LC_CTYPE by inet_nsap_ntoa. Now in <arpa/inet.h>. _IO_dup2 to contain complete parameter list.
Diffstat (limited to 'sysdeps/libm-ieee754/s_nextafterl.c')
-rw-r--r--sysdeps/libm-ieee754/s_nextafterl.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/sysdeps/libm-ieee754/s_nextafterl.c b/sysdeps/libm-ieee754/s_nextafterl.c
new file mode 100644
index 0000000000..0327261f33
--- /dev/null
+++ b/sysdeps/libm-ieee754/s_nextafterl.c
@@ -0,0 +1,99 @@
+/* s_nextafterl.c -- long double version of s_nextafter.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
+
+/* IEEE functions
+ * nextafterl(x,y)
+ * return the next machine floating-point number of x in the
+ * direction toward y.
+ * Special cases:
+ */
+
+#include "math.h"
+#include "math_private.h"
+
+#ifdef __STDC__
+ long double __nextafterl(long double x, long double y)
+#else
+ long double __nextafterl(x,y)
+ long double x,y;
+#endif
+{
+ int32_t hx,hy,ix,iy;
+ u_int32_t lx,ly,esx,esy;
+
+ GET_LDOUBLE_WORDS(esx,hx,lx,x);
+ GET_LDOUBLE_WORDS(esy,hy,ly,y);
+ ix = esx&0x7fff; /* |x| */
+ iy = esy&0x7fff; /* |y| */
+
+ if(((ix==0x7fff)&&((hx|lx)|-(hx|lx))!=0) || /* x is nan */
+ ((iy==0x7fff)&&((hy|ly)|-(hy|ly))!=0)) /* y is nan */
+ return x+y;
+ if(x==y) return x; /* x=y, return x */
+ if((ix|hx|lx)==0) { /* x == 0 */
+ SET_LDOUBLE_WORDS(x,esx&0x8000,0,1);/* return +-minsubnormal */
+ y = x*x;
+ if(y==x) return y; else return x; /* raise underflow flag */
+ }
+ if(esx<0x8000) { /* x > 0 */
+ if(ix>iy||((ix==iy) && (hx>hy||((hx==hy)&&(lx>ly))))) {
+ /* x > y, x -= ulp */
+ if(lx==0) {
+ if (hx==0) esx -= 1;
+ hx -= 1;
+ }
+ lx -= 1;
+ } else { /* x < y, x += ulp */
+ lx += 1;
+ if(lx==0) {
+ hx += 1;
+ if (hx==0)
+ esx += 1;
+ }
+ }
+ } else { /* x < 0 */
+ if(esy>=0||(ix>iy||((ix==iy)&&(hx>hy||((hx==hy)&&(lx>ly)))))){
+ /* x < y, x -= ulp */
+ if(lx==0) {
+ if (hx==0) esx -= 1;
+ hx -= 1;
+ }
+ lx -= 1;
+ } else { /* x > y, x += ulp */
+ lx += 1;
+ if(lx==0) {
+ hx += 1;
+ if (hx==0) esx += 1;
+ }
+ }
+ }
+ esy = esx&0x7fff;
+ if(esy==0x7fff) return x+x; /* overflow */
+ if(esy==0) { /* underflow */
+ y = x*x;
+ if(y!=x) { /* raise underflow flag */
+ SET_LDOUBLE_WORDS(y,esx,hx,lx);
+ return y;
+ }
+ }
+ SET_LDOUBLE_WORDS(x,esx,hx,lx);
+ return x;
+}
+weak_alias (__nextafterl, nextafterl)