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Fri Aug 30 01:26:44 1996 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/i386/Dist: Add close.S. * sysdeps/unix/sysv/linux/m68k/Dist: Likewise. * sysdeps/unix/sysv/linux/alpha/Dist: Likewise. * version.c: Add comment about where to report bugs to. * catgets/gencat.c (usage): Likewise. * db/makedb.c (usage): Likewise. * locale/programs/locale.c (usage): Likewise. * locale/programs/localedef.c (usage): Likewise. * manual/socket.texi: A little bit better wording. Thu Aug 29 18:03:06 1996 Ulrich Drepper <drepper@cygnus.com> * Makerules: Make sure directory exists before generating stamp file. (BUILD_CFLAGS): Always refer to using $(..). * manual/Makefile: Make sure directory exists before generating stamp file. (make-target-directory): Add macro definition. * sysdeps/generic/Makefile: Make sure directory exists before generating stamp file. * Makefile (distribute): Add autolock.sh. Reported by Fila Kolodny. Tue Aug 27 10:06:22 1996 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> When compiling in separate directory put objects into subdirectories matching the source layout. * Makeconfig (objpfx) [ifdef objdir]: Append $(subdir). When looking for configparms try in $(common-objpfx). Use $(common-objpfx)SUBDIR to find objects from other subdirectory builds. * Makerules: Add $(objpfx) to vpath list. (make-dummy-dep): Use $(common-objpfx) to avoid creating dummy.d more than once. All uses in dependency lists changed. (+make-deps): Make target directory. (sed-remove-objpfx): Substitute $(common-objpfx). (do-ar, build-extra-lib, $(common-objpfx)stub-$(subdir)): Use $(objpfx) instead of $(objdir) for cd command. (O%-lib): Always find libc relative to $(..). (subdir-stamps): Collect stamp files from subdirs. (common-mostlyclean): Remove stub file in $(common-objpfx). * MakeTAGS ($P/siglist.pot): Find siglist.c in stdio-common. * Rules (dep-dummy-lib): Use $(common-objpfx) to avoid creating to more than once. ($(objpfx)dummy.c, $(objpfx)empty.c): Change target name to use $(common-objfpx). All uses in dependency lists changed. (generated): Prepend $(..) to names. * bare/Makefile ($(objpfx)lib$(config-vendor).a): Remove $(objpfx) from $@. * nss/Makefile ($(objpfx)libnss_dns.so, $(objpfx)libnss_db.so): Use $(common-objpfx) instead of $(..) in dependencies. * sysdeps/mach/Makefile (mach-objpfx): Unconditionally use $(common-objpfx) instead of $(..) and (objpfx). * sysdeps/mach/hurd/Makefile (hurd-objpfx): Likewise. (rpath-link): Likewise. (rpcuserlibs): Likewise. * sysdeps/unix/Makefile [$(subdir) = stdio-common]: Check for errlist.c in $(objpfx), not $(common-objpfx). ($(common-objpfx)s-proto.d): Special rule not covered by pattern rule. * sysdeps/unix/make-syscalls.sh: Make syscall rules depending on s-proto.d in $(common-objpfx), not $(objpfx). Thu Aug 29 17:45:49 1996 Ulrich Drepper <drepper@cygnus.com> * nss/nsswitch.c (nss_dlerror_run): Free returned error string. Thu Aug 29 15:53:33 1996 Ulrich Drepper <drepper@cygnus.com> * sysdeps/libm-ieee754/e_acoshl.c: New file. `long double' implementation. * sysdeps/libm-ieee754/e_atanhl.c: Likewise. * sysdeps/libm-ieee754/e_remainderl.c: Likewise. * sysdeps/libm-ieee754/e_scalbl.c: Likewise. * sysdeps/libm-ieee754/s_asinhl.c: Likewise. * sysdeps/libm-ieee754/s_cosl.c: Likewise. * sysdeps/libm-ieee754/s_sinl.c: Likewise. * sysdeps/libm-ieee754/s_tanhl.c: Likewise. * sysdeps/libm-ieee754/s_tanl.c: Likewise. * stdio-common/printf_fp.c (__printf_fp): Use default value '.' if
88 lines
2.2 KiB
C
88 lines
2.2 KiB
C
/* s_cosl.c -- long double version of s_cos.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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/* cosl(x)
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* Return cosine function of x.
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*
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* kernel function:
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* __kernel_sinl ... sine function on [-pi/4,pi/4]
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* __kernel_cosl ... cosine function on [-pi/4,pi/4]
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* __ieee754_rem_pio2l ... argument reduction routine
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*
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* Method.
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* Let S,C and T denote the sin, cos and tan respectively on
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* [-PI/4, +PI/4]. Reduce the argument x to y1+y2 = x-k*pi/2
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* in [-pi/4 , +pi/4], and let n = k mod 4.
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* We have
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*
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* n sin(x) cos(x) tan(x)
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* ----------------------------------------------------------
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* 0 S C T
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* 1 C -S -1/T
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* 2 -S -C T
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* 3 -C S -1/T
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* ----------------------------------------------------------
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*
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* Special cases:
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* Let trig be any of sin, cos, or tan.
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* trig(+-INF) is NaN, with signals;
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* trig(NaN) is that NaN;
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*
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* Accuracy:
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* TRIG(x) returns trig(x) nearly rounded
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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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long double __cosl(long double x)
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#else
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long double __cosl(x)
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long double x;
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#endif
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{
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long double y[2],z=0.0;
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int32_t n, se;
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/* High word of x. */
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GET_LDOUBLE_EXP(se,x);
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/* |x| ~< pi/4 */
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se &= 0x7fff;
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if(ix <= 0x3ffe) return __kernel_cosl(x,z);
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/* cos(Inf or NaN) is NaN */
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else if (se==0x7fff) return x-x;
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/* argument reduction needed */
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else {
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n = __ieee754_rem_pio2l(x,y);
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switch(n&3) {
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case 0: return __kernel_cosl(y[0],y[1]);
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case 1: return -__kernel_sinl(y[0],y[1],1);
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case 2: return -__kernel_cosl(y[0],y[1]);
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default:
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return __kernel_sinl(y[0],y[1],1);
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}
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}
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}
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weak_alias (__cosl, cosl)
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