diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-03-16 20:28:07 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1997-03-16 20:28:07 +0000 |
commit | 0d8733c4fc3695c7987548d10c344445f3eb552d (patch) | |
tree | 4a2fe41c465963794a6f9d4d1717494972336e14 /sysdeps/libm-i387/e_pow.S | |
parent | 1ed4222e5724ce863a95c15eb530dfab7ef0451c (diff) | |
download | glibc-0d8733c4fc3695c7987548d10c344445f3eb552d.tar.gz |
Update.
1997-03-16 18:43 Ulrich Drepper <drepper@cygnus.com>
* manual/filesys.texi: Add documentation for scandir and alphasort.
* math/math.c (fpclassify): Correct stupid typos.
* math/libm-test.c: New file. libm test suite by Andreas Jaeger.
* nss/nss_files/files-hosts.c: Add gethostbyname2 imlementation.
* posix/Makefile (routines): Add bsd-getpgrp.
* posix/bsd-getpgrp.c: New file.
* posix/unistd.h [__FAVOR_BSD]: Define macro getpgrp which maps
calls to __bsd_getpgrp.
* sysdeps/generic/getpgrp.c: De-ANSI-declfy.
* sysdeps/i386/huge_val.h: New file. ix87 specific infinity values.
* sysdeps/m68k/huge_val.h: New file. m68k specific infinity values.
* sysdeps/generic/huge_val.h: Remove definition of long double
definition. Make it the same as the double definition.
* sysdeps/libm-i387/e_acos.S: Fix bug in FPU stack handling.
* sysdeps/libm-i387/e_acosf.S: Likewise.
* sysdeps/libm-i387/e_acosl.S: Likewise.
* sysdeps/libm-i387/e_asin.S: Likewise.
* sysdeps/libm-i387/e_asinf.S: Likewise.
* sysdeps/libm-i387/e_asinl.S: Likewise.
* sysdeps/libm-i387/e_exp.S: Likewise.
* sysdeps/libm-i387/e_expf.S: Likewise.
* sysdeps/libm-i387/e_expl.S: Likewise.
* sysdeps/libm-i387/e_scalbn.S: Likewise.
* sysdeps/libm-i387/e_scalbnf.S: Likewise.
* sysdeps/libm-i387/e_scalbnl.S: Likewise.
* sysdeps/libm-i387/e_log.S: Optimize branch code.
* sysdeps/libm-i387/e_logf.S: Likewise.
* sysdeps/libm-i387/e_logl.S: Likewise.
* sysdeps/libm-i387/e_log10.S: Likewise.
* sysdeps/libm-i387/e_log10f.S: Likewise.
* sysdeps/libm-i387/e_log10l.S: Likewise.
* sysdeps/libm-i387/e_pow.S: Major rewrite to handle special cases.
* sysdeps/libm-i387/e_powf.S: Likewise.
* sysdeps/libm-i387/e_powl.S: Likewise.
* sysdeps/libm-i387/e_expm1.S: Change return value for -inf
argument to -1.0.
* sysdeps/libm-i387/e_expm1f.S: Likewise.
* sysdeps/libm-i387/e_expm1l.S: Likewise.
* sysdeps/libm-i387/e_isinfl.c: Return -1 for -inf.
* sysdeps/libm-i387/e_logbl.S: Correct return value. Discard first
stack element after fxtract.
* sysdeps/libm-ieee754/e_atan2l.c: New file. `long double'
implementation for atan2 function.
* sysdeps/libm-ieee754/k_standard.c: Return NAN for libm not in
_SVID_ mode when acos, asin, atan2, log, log10 is called with
argument out of range.
Add new error case for pow(+0,neg).
* sysdeps/libm-ieee754/s_fpclassifyf.c: Correct recognition of
NaN and +-inf.
* sysdeps/libm-ieee754/s_fpclassifyl.c: Mask out explicit leading
digit in stupid 80 bit formats.
* sysdeps/libm-ieee754/s_isinf.c: Rewrite to return -1 for -inf.
* sysdeps/libm-ieee754/s_isinff.c: Likewise.
* sysdeps/libm-ieee754/s_isinfl.c: Likewise.
* sysdeps/libm-ieee754/s_scalbnl.c (huge, tiny): Adapt values for
long double type.
* sysdeps/libm-ieee754/w_atan2.c: Do not raise exception expect when
in SVID mode.
* sysdeps/libm-ieee754/w_atan2f.c: Likewise.
* sysdeps/libm-ieee754/w_atan2l.c: Likewise.
* sysdeps/libm-ieee754/w_pow.c: Distinguish error cases for x is +0
or -0.
* sysdeps/posix/isfdtype.c: Add cast to prevent warning.
* sysdeps/stub/fcntlbits.h: Update copyright.
* sysdeps/unix/bsd/fcntlbits.h: Likewise.
* sysdeps/unix/bsd/bsd4.4/fcntlbits.h: Likewise.
* sysdeps/unix/bsd/sun/sunos4/fcntlbits.h: Likewise.
* sysdeps/unix/bsd/ultrix4/fcntlbits.h: Likewise.
* sysdeps/unix/common/fcntlbits.h: Likewise.
* sysdeps/unix/sysv/fcntlbits.h: Likewise. Define O_FSYNC as alias
of O_SYNC. Add BSD compatibility macros FAPPEND, FFSYNC, FNONBLOCK,
and FNDELAY.
* sysdeps/unix/sysv/irix4/fcntlbits.h: Likewise.
* sysdeps/unix/readdir_r.c: Don't copy whole `struct dirent' record,
only reclen bytes.
* sysdeps/unix/sysv/linux/fcntlbits.h [__USE_GNU]: Add O_READ, O_WRITE
and O_NORW.
* sysdeps/unix/sysv/linux/alpha/fcntlbits.h: Likewise.
* sysdeps/unix/sysv/linux/init-first.h: Add copyright.
* sysdeps/unix/sysv/linux/fxstat.c: New file. Rewrite kernel-level
struct stat to user-level form.
* sysdeps/unix/sysv/linux/lxstat: New file.
* sysdeps/unix/sysv/linux/xstat: New file.
* sysdeps/unix/sysv/linux/kernel_stat.h: Define struct stat used in
kernel.
* sysdeps/unix/sysv/linux/statbuf.h (struct stat): Change definition
to use prescribed types for elements.
(_STAT_VER): Change to value 3.
* sysdeps/unix/sysv/linux/alph/statbuf.h: Likewise.
* sysdeps/unix/sysv/linux/Dist: Add kernel_stat.h.
* sysdeps/unix/sysv/linux/alpha/Dist: Likewise.
* time/Makefile: Correct dependencies for test-tz.
1997-03-16 14:59 Philip Blundell <phil@london.uk.eu.org>
* resolv/netdb.h: Add prototypes for gai_strerror and getnameinfo
(needed for IPv6 basic sockets API).
1997-03-16 15:02 a sun <asun@zoology.washington.edu>
* sysdeps/unix/sysv/linux/net/if_ppp.h: Don't use incompatible
kernel header.
* sysdeps/unix/sysv/linux/net/ppp_defs.h: Likewise.
1997-03-14 17:15 Ulrich Drepper <drepper@cygnus.com>
* db/hash/hash_bigkey.c (__big_delete): Don't call __free_ovflpage
without testing for last_bfp to be NULL.
Reported by fabsoft@fabserver1.zarm.uni-bremen.de.
1997-03-13 11:42 Jim Meyering <meyering@asic.sc.ti.com>
* time/mktime.c (TIME_T_MIN): Work around a bug in Cray C 5.0.3.0.
1997-03-14 04:00 Kurt Garloff <garloff@kg1.ping.de>
* sysdeps/unix/sysv/linux/fcntlbits.h (O_FSYNC): Make alias for O_SYNC.
(FASYNC): Move to __USE_BSD section. Create new macro O_ASYNC.
1997-03-14 02:50 Ulrich Drepper <drepper@cygnus.com>
* nis/nss_nis/nis-hosts.c (_nss_nis_gethostbyname2_r): New
functions. Compare result for correct address type.
(_nss_nis_gethostbyname_r): Use _nss_nis_gethostbyname2_r.
Reported by Mirko Streckenbach <mirko@marian.hil.de>.
1997-02-17 01:40 Zlatko Calusic <zcalusic@srce.hr>
* time/strptime.c (recursive): Return rp to caller.
(strptime_internal): First check for long names, then abbreviated
(month & weekday).
1997-03-10 19:44 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* Makeconfig: Remove useless definitions of ASFLAGS-%.
* config.make.in (ASFLAGS-.so): Remove.
* configure.in: Don't substitute ASFLAGS_SO.
* sysdeps/sparc/configure.in: Remove file.
* sysdeps/sparc/Makefile (ASFLAGS-.so): Define.
1997-03-11 17:00 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* time/strptime.c (strptime_internal) [case 'Y']: Always subtract
1900 from year, regardless of century.
1997-03-12 05:43 Ulrich Drepper <drepper@cygnus.com>
* stdlib/strtod.c (_tens_in_limb) [BITS_PER_MP_LIMB > 32]: Make
all numbers unsigned to make buggy gccs happy.
Patch by Bryan W. Headley <bheadley@interaccess.com>.
* sysdeps/unix/sysv/linux/netinet/ip.h: Add backward-compatibility
definitions. Patch by a sun <asun@zoology.washington.edu>.
Pretty print header.
* Makerules (build-shlib): Also create symlink if library is versioned.
based on a patch by H.J. Lu <hjl@gnu.ai.mit.edu>.
Remove special rule to libc.so symlink.
1997-03-11 20:16 Andreas Jaeger <aj@arthur.pfalz.de>
* manual/math.texi (Domain and Range Errors): Change descriptions
according to recent changes for ISO C 9X.
1997-03-11 22:39 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/libm-ieee754/k_standard.c (__kernel_standard): Correct
return values for acos, asin, and atan2.
Reported by Andreas Jaeger <aj@arthur.pfalz.de>.
1997-03-10 18:16 Thorsten Kukuk <kukuk@vt.uni-paderborn.de>
* ypclnt.c (__yp_bind): Fix possible buffer overflow.
1997-03-10 18:06 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* dirent/alphasort.c (alphasort): Interpret arguments as pointers
to pointers to directory entries so that alphasort really can be
used as argument for scandir.
1997-03-09 23:33 Andreas Jaeger <aj@arthur.pfalz.de>
* string/strdup.c: Declare memcpy if !(_LIBC || STDC_HEADERS)
instead of strcpy.
1997-03-10 03:34 Ulrich Drepper <drepper@cygnus.com>
* catgets/catgets.c (catopen): Always add NLSPATH to search path for
catalogs, not only if the envvar NLSPATH is not available.
Reported by Andries.Brouwer@cwi.nl.
1997-03-10 02:46 Ulrich Drepper <drepper@cygnus.com>
* Makeconfig (localtime-file): Don't define using installation
directory.
(inst_localtime-file): New variable.
* time/Makefile (installed-localtime-file): Use inst_localtime-file.
Reported by Edward Seidl <seidl@janed.com>.
1997-03-10 02:31 H.J. Lu <hjl@gnu.ai.mit.edu>
* time/Makefile: Add source files to dependencies for test data.
1997-03-09 22:53 Thorsten Kukuk <kukuk@weber.uni-paderborn.de>
* nis/nss_nis/nis-ethers.c: Don't ignore return value of yp_all.
* nis/nss_nis/nis-proto.c: Likewise.
* nis/nss_nis/nis-rpc.c: Likewise.
* nis/nss_nis/nis-service.c: Likewise.
1997-03-08 14:37 Miguel de Icaza <miguel@nuclecu.unam.mx>
* sysdeps/sparc/dl-machine.h (elf_machine_rela): Upgrade to
versioning; Added missing R_SPARC_WDISP30 handling.
(RTLD_START): Implement it.
* sysdeps/unix/sysv/linux/sparc/brk.c: Fix.
* sysdeps/unix/sysv/linux/sparc/start.c: Startup code for
Linux/SPARC.
1997-03-02 18:06 Miguel de Icaza <miguel@nuclecu.unam.mx>
* sysdeps/sparc/dl-machine.h (RTLD_START): Make arg as expected by
the dynamic linker instead of having a new conditional define.
Thanks to Richard Henderson for pointing this out.
* elf/rtld.c: Remove usage of ELF_ADJUST_ARG.
1997-03-20 20:44 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>
* sysdeps/mach/hurd/euidaccess.c: Define as __euidaccess and make
euidaccess weak alias.
1997-03-07 10:30 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>
* stdio-common/printf_fphex.c (MIN): New macro.
* sysdeps/generic/netinet/in.h: Include <sys/types.h>.
* sysdeps/generic/sys/mman.h (msync): Mention third arg.
* sysdeps/generic/netinet/in.h: Add definitions for IPv6 basic
API. (See change by Philip Blundell on Feb 16, 1997.)
1997-03-05 10:40 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>
* hurd/hurd.h (vpprintf): Include <stdarg.h>. New declaration.
* hurd/set-host.c (_hurd_set_host_config): Cast second arg to
__file_name_split.
* mach/mach_error.c (mach_error_string_int): Give full prototype.
* mach/errstring.c (mach_error_string_int): Likewise.
* mach/error_compat.c (__mach_error_map_compat): Likewise.
* hurd/vpprintf.c (pwrite, vpprintf): Likewise.
* stdio/vasprintf.c (vasprintf): Likewise.
* mach/mach/mach_traps.h: Include <mach/kern_return.h>.
* mach/spin-solid.c: Include <mach/mach_traps.h>.
* mach/spin-solid.c (__spin_lock_solid): Provide arg to
swtch_pri.
* mach/mach_init.c: Include <mach/mig_support.h>.
* mach/mach_error.h (mach_error_string, mach_error,
mach_error_type): Always provide prototypes.
* mach/mach/error.h (mach_error_fn_t): Comment out declaration; it
appears to be entirely unused dead code.
* stdio/stdio.h (freopen): Fix spelling error.
1997-03-02 13:38 Miles Bader <miles@gnu.ai.mit.edu>
* string/argz.h (__need_error_t): New macro, before including <errno.h>
[!__const] (__const): New macro.
[!__error_t_defined] (error_t): New typedef.
* sysdeps/generic/socketbits.h: Add PF_FILE as synonym for PF_LOCAL
* sysdeps/unix/sysv/linux/socketbits.h: Likewise.
Diffstat (limited to 'sysdeps/libm-i387/e_pow.S')
-rw-r--r-- | sysdeps/libm-i387/e_pow.S | 219 |
1 files changed, 210 insertions, 9 deletions
diff --git a/sysdeps/libm-i387/e_pow.S b/sysdeps/libm-i387/e_pow.S index f6c7562d9c..efe184168b 100644 --- a/sysdeps/libm-i387/e_pow.S +++ b/sysdeps/libm-i387/e_pow.S @@ -1,5 +1,5 @@ /* ix87 specific implementation of pow function. - Copyright (C) 1996 Free Software Foundation, Inc. + Copyright (C) 1996, 1997 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. @@ -27,31 +27,77 @@ #endif .align ALIGNARG(4) + ASM_TYPE_DIRECTIVE(infinity,@object) +inf_zero: +infinity: + .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x7f + ASM_SIZE_DIRECTIVE(infinity) + ASM_TYPE_DIRECTIVE(zero,@object) +zero: .double 0.0 + ASM_SIZE_DIRECTIVE(zero) + ASM_TYPE_DIRECTIVE(minf_mzero,@object) +minf_mzero: +minfinity: + .byte 0, 0, 0, 0, 0, 0, 0xf0, 0xff +mzero: + .byte 0, 0, 0, 0, 0, 0, 0, 0x80 + ASM_SIZE_DIRECTIVE(minf_mzero) ASM_TYPE_DIRECTIVE(one,@object) one: .double 1.0 ASM_SIZE_DIRECTIVE(one) ASM_TYPE_DIRECTIVE(limit,@object) limit: .double 0.29 ASM_SIZE_DIRECTIVE(limit) + ASM_TYPE_DIRECTIVE(nan,@object) +nan: .byte 0, 0, 0, 0, 0, 0, 0xff, 0x7f + ASM_SIZE_DIRECTIVE(nan) #ifdef PIC #define MO(op) op##@GOTOFF(%ecx) +#define MOX(op,x,f) op##@GOTOFF(%ecx,x,f) #else #define MO(op) op +#define MOX(op,x,f) op(,x,f) #endif .text ENTRY(__ieee754_pow) - fldl 4(%esp) // x - fldl 12(%esp) // y : x + fldl 12(%esp) // y + fxam + fnstsw + movb %ah, %dl + andb $0x45, %ah + cmpb $0x40, %ah // is y == 0 ? + je 11f + + cmpb $0x05, %ah // is y == �inf ? + je 12f + + cmpb $0x01, %ah // is y == NaN ? + je 30f #ifdef PIC call 1f 1: popl %ecx addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ecx #endif + + fldl 4(%esp) // x : y + subl $8,%esp + fxam + fnstsw + movb %ah, %dh + andb $0x45, %ah + cmpb $0x40, %ah + je 20f // x is �0 + + cmpb $0x05, %ah + je 15f // x is �inf + + fxch // y : x + /* First see whether `y' is a natural number. In this case we can use a more precise algorithm. */ fld %st // y : y : x @@ -63,13 +109,11 @@ ENTRY(__ieee754_pow) jne 2f /* OK, we have an integer value for y. */ - ftst // y : x - fstp %st(0) // x - fnstsw - sahf popl %eax popl %edx - jnc 4f // y >= 0, jump + orl $0, %edx + fstp %st(0) // x + jns 4f // y >= 0, jump fdivrl MO(one) // 1/x (now referred to as x) negl %eax adcl $0, %edx @@ -87,7 +131,7 @@ ENTRY(__ieee754_pow) orl %edx, %ecx jnz 6b fstp %st(0) // ST*x - ret +30: ret .align ALIGNARG(4) 2: /* y is a real number. */ @@ -117,4 +161,161 @@ ENTRY(__ieee754_pow) addl $8, %esp fstp %st(1) // 2^fract(y*log2(x))*2^int(y*log2(x)) ret + + + // pow(x,�0) = 1 + .align ALIGNARG(4) +11: fstp %st(0) // pop y + fldl MO(one) + ret + + // y == �inf + .align ALIGNARG(4) +12: fstp %st(0) // pop y + fldl 4(%esp) // x + fabs + fcompl MO(one) // < 1, == 1, or > 1 + fnstsw + andb $0x45, %ah + cmpb $0x45, %ah + je 13f // jump if x is NaN + + cmpb $0x40, %ah + je 14f // jump if |x| == 1 + + shlb $1, %ah + xorb %ah, %dl + andl $2, %edx + fldl MOX(inf_zero, %edx, 4) + ret + + .align ALIGNARG(4) +14: fldl MO(nan) + faddl MO(zero) // raise invalid exception + ret + + .align ALIGNARG(4) +13: fldl 4(%esp) // load x == NaN + ret + + .align ALIGNARG(4) + // x is �inf +15: fstp %st(0) // y + testb $2, %dh + jz 16f // jump if x == +inf + + // We must find out whether y is an odd integer. + fld %st // y : y + fistpll (%esp) // y + fildll (%esp) // int(y) : y + fucompp // <empty> + fnstsw + sahf + jne 17f + + // OK, the value is an integer, but is the number of bits small + // enough so that all are coming from the mantissa? + popl %eax + popl %edx + andb $1, %al + jz 18f // jump if not odd + movl %edx, %eax + orl %edx, %edx + jns 155f + negl %eax +155: cmpl $0x00200000, %eax + ja 18f // does not fit in mantissa bits + // It's an odd integer. + shrl $31, %edx + fldl MOX(minf_mzero, %edx, 8) + ret + + .align ALIGNARG(4) +16: fcompl MO(zero) + addl $8, %esp + fnstsw + shrl $5, %eax + andl $8, %eax + fldl MOX(inf_zero, %eax, 1) + ret + + .align ALIGNARG(4) +17: shll $30, %edx // sign bit for y in right position + addl $8, %esp +18: shrl $31, %edx + fldl MOX(inf_zero, %edx, 8) + ret + + .align ALIGNARG(4) + // x is �0 +20: fstp %st(0) // y + testb $2, %dl + jz 21f // y > 0 + + // x is �0 and y is < 0. We must find out whether y is an odd integer. + testb $2, %dh + jz 25f + + fld %st // y : y + fistpll (%esp) // y + fildll (%esp) // int(y) : y + fucompp // <empty> + fnstsw + sahf + jne 26f + + // OK, the value is an integer, but is the number of bits small + // enough so that all are coming from the mantissa? + popl %eax + popl %edx + andb $1, %al + jz 27f // jump if not odd + cmpl $0xffe00000, %edx + jbe 27f // does not fit in mantissa bits + // It's an odd integer. + // Raise divide-by-zero exception and get minus infinity value. + fldl MO(one) + fdivl MO(zero) + fchs + ret + +25: fstp %st(0) +26: popl %eax + popl %edx +27: // Raise divide-by-zero exception and get infinity value. + fldl MO(one) + fdivl MO(zero) + ret + + .align ALIGNARG(4) + // x is �0 and y is > 0. We must find out whether y is an odd integer. +21: testb $2, %dh + jz 22f + + fld %st // y : y + fistpll (%esp) // y + fildll (%esp) // int(y) : y + fucompp // <empty> + fnstsw + sahf + jne 23f + + // OK, the value is an integer, but is the number of bits small + // enough so that all are coming from the mantissa? + popl %eax + popl %edx + andb $1, %al + jz 24f // jump if not odd + cmpl $0xffe00000, %edx + jbe 24f // does not fit in mantissa bits + // It's an odd integer. + fldl MO(mzero) + ret + +22: fstp %st(0) +23: popl %eax + popl %edx +24: fldl MO(zero) + ret + END(__ieee754_pow) |