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authorUlrich Drepper <drepper@redhat.com>1997-03-16 20:28:07 +0000
committerUlrich Drepper <drepper@redhat.com>1997-03-16 20:28:07 +0000
commit0d8733c4fc3695c7987548d10c344445f3eb552d (patch)
tree4a2fe41c465963794a6f9d4d1717494972336e14 /sysdeps/libm-i387/e_pow.S
parent1ed4222e5724ce863a95c15eb530dfab7ef0451c (diff)
downloadglibc-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.S219
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)