From bc9f6000f6752153e5e1902259d5f491a88a1ae5 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Sun, 23 Mar 1997 01:54:07 +0000 Subject: Update. 1997-03-23 02:11 Ulrich Drepper * time/sys/time.h: Make values ITIMER_* also available as macros. * elf/dl-support.c (_dl_sysdep_read_whole_file): Don't call __fstat but instead __fxstat directly to avoid dependency on libc.a when inline failed. * sysdeps/generic/dl-sysdep.c (_dl_sysdep_read_whole_file): Likewise. * math/Makefile (libm-routines): Add s_remquo. * sysdeps/libm-i387/s_remquo.S: New file. * sysdeps/libm-i387/s_remquof.S: New file. * sysdeps/libm-i387/s_remquol.S: New file. * sysdeps/libm-ieee754/s_remquo.c: New file. * sysdeps/libm-ieee754/s_remquof.c: New file. * sysdeps/libm-ieee754/s_remquol.c: New file. * math/libm-test.c (remquo_test): New function. * sysdeps/libm-ieee754/s_rintl.c: Handle implicit leading one correctly. 1997-03-22 14:06 Ulrich Drepper * math/Makefile (libm-calls): Add s_nan. * sysdeps/libm-ieee754/s_nan.c: New file. Implement `nan' function. * sysdeps/libm-ieee754/s_nanf.c: New file. Implement `nanf' function. * sysdeps/libm-ieee754/s_nanl.c: New file. Implement `nanl' function. * math/libm-test.c (basic_tests): Add tests for `nan' function. * math/libm-test.c (copysign_test): New function. (main): Call copysign_test. 1997-03-22 06:28 Ulrich Drepper * sysdeps/libm-ieee754/s_nextafter.c: Return y if x == y. * sysdeps/libm-ieee754/s_nextafterf.c: Likewise. * sysdeps/libm-ieee754/s_nextafterl.c: Likewise. * sysdeps/libm-i387/s_nextafterl.c: Likewise. * math/libm-test.c (fdim_test, fmin_test, fmax_test, nextafter_test): New functions. Test these functions. (main): Call above new functions. 1997-03-22 04:53 Ulrich Drepper * Net release 2.0.2. 1997-03-22 04:37 Ulrich Drepper * sysdeps/unix/sysv/linux/termbits.h (OXTABS): Define as alias for XTABS. * sysdeps/unix/sysv/linux/alpha/termbits.h (OXTABS): Likewise. * termios/sys/ttydefaults.h: Partly revert patch by Andreas Schwab of Sun Dec 15 16:33:44 1996. Proposed by Thomas Bushnell . 1997-03-21 13:41 Roland McGrath * sysdeps/sparc/dl-machine.h (elf_machine_rel): Rewritten as for i386. Check here for non-SHN_UNDEF STB_LOCAL symbols don't do any lookup or consult their values. (elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p, ELF_MACHINE_RELOC_NOPLT): New macros. * elf/rtld.c (dl_main): Pass ELF_MACHINE_RELOC_NOPLT to _dl_lookup_symbol in place of DL_LOOKUP_NOPLT. * sysdeps/i386/dl-machine.h (ELF_MACHINE_RELOC_NOPLT): New macro. * sysdeps/i386/dl-machine.h (elf_machine_rel): Rewritten to do the symbol lookup before checking reloc type except for R_386_RELATIVE. (elf_machine_lookup_noexec_p, elf_machine_lookup_noplt_p): New macros. * elf/dl-reloc.c (RESOLVE): Remove STB_LOCAL check; let it be per-machine since it supposedly can't happen on i386. * elf/dl-lookup.c (do_lookup): Change arg FLAGS to RELOC_TYPE. Use elf_machine_lookup_{noexec,noplt}_p macros on it. Remove gratuitous indirection from REF arg; change callers. (_dl_lookup_symbol, _dl_lookup_versioned_symbol): Change arg name. (_dl_lookup_symbol_skip, _dl_lookup_versioned_symbol_skip): Remove FLAGS arg altogether. * elf/dlsym.c: Remove argument of FLAGS parameter. * elf/dlvsym.c: Likewise. * elf/link.h: Update decls. * Makefile (distribute): Add BUGS. --- sysdeps/libm-ieee754/s_remquol.c | 106 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 sysdeps/libm-ieee754/s_remquol.c (limited to 'sysdeps/libm-ieee754/s_remquol.c') diff --git a/sysdeps/libm-ieee754/s_remquol.c b/sysdeps/libm-ieee754/s_remquol.c new file mode 100644 index 0000000000..9515b218c6 --- /dev/null +++ b/sysdeps/libm-ieee754/s_remquol.c @@ -0,0 +1,106 @@ +/* Compute remainder and a congruent to the quotient. + Copyright (C) 1997 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Ulrich Drepper , 1997. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#include + +#include "math_private.h" + + +static const double zero = 0.0; + + +long double +__remquol (long double x, long double y, int *quo) +{ + int32_t ex,ep,hx,hp; + u_int32_t sx,lx,lp; + int cquo; + + GET_LDOUBLE_WORDS (ex, hx, lx, x); + GET_LDOUBLE_WORDS (ep, hp, lp, p); + sx = ex & 0x8000; + qs = (sx ^ (ep & 0x8000)) >> 15; + ep &= 0x7fff; + ex &= 0x7fff; + + /* Purge off exception values. */ + if ((ep | hp | lp) == 0) + return (x * p) / (x * p); /* p = 0 */ + if ((ex == 0x7fff) /* x not finite */ + || ((ep == 0x7fff) /* p is NaN */ + && ((hp | lp) != 0))) + return (x * p) / (x * p); + + if (ep <= 0x7ffb) + { + x = __ieee754_fmodl (x, 8 * p); /* now x < 8p */ + + if (fabsl (x) >= 4 * fabsl (p)) + cquo += 4; + } + + if (((ex - ep) | (hx - hp) | (lx - lp)) == 0) + { + *quo = qs ? -1 : 1; + return zero * x; + } + + x = fabsl (x); + p = fabsl (p); + cquo = 0; + + if (x >= 2 * p) + { + x -= 4 * p; + cquo += 2; + } + if (x >= p) + { + x -= 2 * p; + ++cquo; + } + + if (ep < 0x0002) + { + if (x + x > p) + { + x -= p; + if (x + x >= p) + x -= p; + } + } + else + { + long double p_half = 0.5 * p; + if(x > p_half) + { + x -= p; + if (x >= p_half) + x -= p; + } + } + + *quo = qs ? -cquo : cquo; + + GET_LDOUBLE_EXP (ex, x); + SET_LDOUBLE_EXP (x, ex ^ sx); + return x; +} +weak_alias (__remquol, remquol) -- cgit 1.4.1