diff options
author | Ulrich Drepper <drepper@redhat.com> | 1997-09-11 12:09:10 +0000 |
---|---|---|
committer | Ulrich Drepper <drepper@redhat.com> | 1997-09-11 12:09:10 +0000 |
commit | 9a0a462ceb4ab96c909b182f3052de2ef13fbe3a (patch) | |
tree | 59456497b6acefe69aab04fc28c38ea38852ccc7 /sysdeps/powerpc/strcmp.s | |
parent | 26b4d7667169f8db26fd8194b3c498ec58e50f90 (diff) | |
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Update.
1997-09-11 04:36 Ulrich Drepper <drepper@cygnus.com>
* db2/db_int.h: Define __set_errno if not yet available.
* db2/btree/bt_rec.c: Use __set_errno to set errno value.
* db2/clib/getlong.c: Likewise.
* db2/db185/db185.c: Likewise.
* db2/db185/db185_int.h: Likewise.
* db2/dbm/dbm.c: Likewise.
* db2/lock/lock_deadlock.c: Likewise.
* db2/log/log_archive.c: Likewise.
* elf/dl-profile.c: Implement mcount function.
* gmon/gmon.c: Use __profil not profil because of namespace pollution.
* gmon/mcount.c: Remove BSD kernel code.
Use compare&swap instruction if possible to change state variable.
Optimize frompc folding.
* gmon/sys/gmon.h (struct gmonparam): Change state field to long int.
* sysdeps/i386/i486/atomicity.h: New file.
* sysdeps/stub/atomicity.h: New file.
* sysdeps/mach/hurd/profil.c: Define function as __profil and make
profil weak alias.
* sysdeps/posix/profil.c: Likewise.
* string/bits/string2.h: New file.
* include/bits/string2.h: New file.
* string/Makefile (routines): Add mempcpy.
(tests): Add inl-tester.
Remove _D__NO_STRING_INLINES from CFLAGS-* variables.
* sysdeps/generic/mempcpy.c: New file.
* sysdeps/generic/memccpy.c: Undef function name to enable definition
as macro.
* sysdeps/generic/memchr.c: Likewise.
* sysdeps/generic/memcmp.c: Likewise.
* sysdeps/generic/memmem.c: Likewise.
* sysdeps/generic/memmove.c: Likewise.
* sysdeps/generic/strcat.c: Likewise.
* sysdeps/generic/strchr.c: Likewise.
* sysdeps/generic/strcmp.c: Likewise.
* sysdeps/generic/strcpy.c: Likewise.
* sysdeps/generic/strcspn.c: Likewise.
* sysdeps/generic/strlen.c: Likewise.
* sysdeps/generic/strncat.c: Likewise.
* sysdeps/generic/strncmp.c: Likewise.
* sysdeps/generic/strncpy.c: Likewise.
* sysdeps/generic/strpbrk.c: Likewise.
* sysdeps/generic/strrchr.c: Likewise.
* sysdeps/generic/strsep.c: Likewise.
* sysdeps/generic/strspn.c: Likewise.
* sysdeps/generic/strstr.c: Likewise.
* sysdeps/generic/strtok.c: Likewise.
* sysdeps/generic/strtok_r.c: Likewise.
* sysdeps/i386/memset.c: Likewise.
* sysdeps/i386/bits/string.h: Correct a few types and constraints.
* sysdeps/i386/i486/bits/string.h: Heavy rewrites and optimizations.
* string/stratcliff.c: Undefine __USE_STRING_INLINES.
* string/tst-strlen.c: Likewise.
* string/string.h: Add prototype for mempcpy. Include bits/string2.h
header always if optimizing.
* intl/dcgettext.c: Don't unconditionally define stpcpy, only if not
yet defined.
* intl/l10nflist.c: Likewise.
* string/tester.c: Add copyright and make little cleanups.
* inet/test_ifindex.c: Change type of ni variable to unsigned int.
* locale/programs/ld-ctype.c (struct locale_ctype_t): Change type
of fields map_collection_max and map_collection_act to size_t.
* nss/libnss_files.map: Group entries.
* posix/unistd.h: Add prototype for __setpgid and __profil.
* sysdeps/generic/crypt.h: Declare __crypt_r.
* sysdeps/i386/bits/select.h: Fix fatal bugs, use correct casts now.
* sysdeps/i386/fpu/bits/mathinline.h (isgreater, isgreaterequal,
isless, islessequal, islessgreater, isunordered): Optimize a bit.
* sysdeps/stub/ftruncate.c: Include missing header for prototype.
* sysdeps/stub/getdents.c: Likewise.
* sysdeps/stub/reboot.c: Likewise.
* sysdeps/stub/swapon.c: Likewise.
* sysdeps/stub/syscall.c: Likewise.
* sysdeps/stub/ualarm.c: Likewise.
* sysdeps/stub/usleep.c: Likewise.
* sysdeps/unix/sysv/linux/if_index.c: Don't compile or use opensock
if SIOGIFINDEX and SIOGIFNAME are not defined.
* sysdeps/unix/sysv/linux/net/if.h: Add IFF_PORTSEL and IFF_AUTOMEDIA
according to recent kernel changes.
1997-09-10 21:32 Klaus Espenlaub <kespenla@student.informatik.uni-ulm.de>
* Makeconfig: Use $(have-initfini) instead of $(elf) to figure out
the installed name of the startup code.
(common-generated): Add version.mk.
* Makefile (distclean-1): Add glibcbug.
* Makerules: Replace -lgcc by $(gnulib).
* catgets/Makefile (generated): Add xmalloc.o.
* csu/Makefile (generated): Replace align.h and end.h by defs.h to
match the generated file.
* manual/Makefile (mostlyclean): Add stub-manual and stamp.o.
(realclean): Changed to remove chapters-incl[12].
* po/Makefile (realclean): New rule to remove the generated .mo files.
* time/Makefile: Only include zonefile dependencies if $(no_deps) is
not true to avoid make clean failure when directory time doesn't exist
yet.
(generated): Add tzselect.
* stdio/fgets.c (fgets): Add casts to reduce gcc warning noise.
* stdio/internals.c (flushbuf): Likewise.
* stdio/linewrap.c (lwupdate): Likewise.
* stdio/memstream.c (enlarge_buffer): Likewise.
* stdio-common/vfscanf.c (_IO_vfscanf): Likewise.
* time/tzset.c (compute_change): Likewise.
* misc/init-misc.c (__init_misc): Only declare static if HAVE_GNU_LD
is defined.
* sysdeps/posix/pipestream.c (FUNC): Change to generate ANSI C style
functions.
* sysdeps/stub/init-posix.c: Likewise.
* sysdeps/stub/profil.c: Likewise.
* munch-tmpl.c (__libc_init): Convert to ANSI C style declaration to
reduce gcc warning noise.
* stdio/glue.c (_filbuf, _flsbuf): Likewise.
* stdio/obstream.c (grow, seek, input, init_obstream): Likewise.
* stdio/vasprintf.c (enlarge_buffer): Likewise.
* sysdeps/generic/sysd-stdio.c (__stdio_read, __stdio_write,
__stdio_seek, __stdio_close, __stdio_fileno, __stdio_open,
__stdio_reopen): Likewise.
* sysdeps/posix/defs.c (_cleanup): Likewise.
* time/offtime.c (__offtime): Add cast.
* posix/getopt.c: Don't use text_set_element if not defined.
* configure.in: Provide a check for underscores before user labels
that works even when the compiler used for building doesn't work
(like when there is no C library). Use the old way if the compiler
works.
1997-09-10 05:08 David S. Miller <davem@caip.rutgers.edu>
* sysdeps/unix/sysv/linux/sparc/bits/ioctls.h: The TC* ioctls use
'T' not 't' on SparcLinux.
* sysdeps/unix/sysv/linux/sparc/bits/termios.h: tcflag_t is 32 bits.
* sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S: Add aliases for
_longjmp and siglongjmp.
1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* libio/stdio.h: Add format attributes to the extra printf and
scanf like functions.
* stdio/stdio.h: Likewise.
1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* nis/nss_nisplus/nisplus-network.c (_nss_nisplus_getnetbyaddr_r):
Print tablename_val, not tablename_len.
* nis/nss_nisplus/nisplus-ethers.c (_nss_nisplus_getntohost_r):
Use sprintf instead of sprintf, the string always fits.
* nis/nss_nisplus/nisplus-hosts.c (_nss_nisplus_gethostbyaddr_r):
Likewise.
* nis/nss_nisplus/nisplus-network.c (_nss_nisplus_getnetbyaddr_r):
Likewise.
* nis/nss_nisplus/nisplus-proto.c
(_nss_nisplus_getprotobynumber_r): Likewise.
* nis/nss_nisplus/nisplus-rpc.c (_nss_nisplus_getrpcbynumber_r):
Likewise.
* nis/nss_nisplus/nisplus-service.c
(_nss_nisplus_getservbynumber_r): Likewise.
* nis/nss_nisplus/nisplus-alias.c (_nss_create_tablename): Use
__stpcpy, __stpncpy and __strdup instead of public names.
* nis/nss_nisplus/nisplus-ethers.c (_nss_create_tablename):
Likewise.
* nis/nss_nisplus/nisplus-grp.c (_nss_create_tablename): Likewise.
* nis/nss_nisplus/nisplus-hosts.c (_nss_create_tablename):
Likewise.
* nis/nss_nisplus/nisplus-netgrp.c (_nss_nisplus_parse_netgroup):
Likewise.
* nis/nss_nisplus/nisplus-network.c (_nss_nisplus_parse_netent):
Likewise.
(_nss_create_tablename): Likewise.
* nis/nss_nisplus/nisplus-proto.c (_nss_nisplus_parse_protoent):
Likewise.
(_nss_create_tablename): Likewise.
* nis/nss_nisplus/nisplus-pwd.c (_nss_create_tablename):
Likewise.
* nis/nss_nisplus/nisplus-rpc.c (_nss_nisplus_parse_rpcent):
Likewise.
(_nss_create_tablename): Likewise.
* nis/nss_nisplus/nisplus-service.c (_nss_nisplus_parse_servent):
Likewise.
(_nss_create_tablename): Likewise.
* nis/nss_nisplus/nisplus-spwd.c (_nss_create_tablename):
Likewise.
* libc.map: Export __stpcpy and __strdup.
1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* math/Makefile (CFLAGS-test-float.c, CFLAGS-test-double.c,
CFLAGS-test-ldouble.c): Pass -ffloat-store to avoid excessive
precision.
1997-09-09 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de>
* include/rpc/auth_des.h: New file.
1997-09-09 Paul Eggert <eggert@twinsun.com>
* time/mktime.c (__mktime_internal): Declare sec_requested even if
!LEAP_SECONDS_POSSIBLE, since it's needed at the end when checking
for time_t overflow.
1997-09-09 22:11 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/posix/getcwd.c: Correct test for too small buffer.
Reported by Erik Troan <ewt@redhat.com>.
* elf/dl-close.c: Include <bits/libc-lock.h>, not <libc-lock.h>.
* elf/dl-open.c: Likewise.
1997-09-07 17:09 Richard Henderson <rth@cygnus.com>
* sysdeps/alpha/Makefile: Kill setjmp_aux.
* sysdeps/alpha/bits/setjmp.h: Rewrite in terms of an array.
* sysdeps/alpha/__longjmp.c: Remove.
* sysdeps/alpha/setjmp_aux.c: Remove.
* sysdeps/alpha/__longjmp.S: New file.
* sysdeps/alpha/bsd-_setjmp.S: Stub out.
* sysdeps/alpha/bsd-setjmp.S: Likewise.
* sysdeps/alpha/setjmp.S: Do the work; don't call __setjmp_aux.
Move _setjmp and setjmp from bsd-*.S.
1997-09-06 20:20 Ulrich Drepper <drepper@cygnus.com>
* include/rpc/auth.h: New file.
* include/rpc/auth_unix.h: New file.
1997-09-06 Paul Eggert <eggert@twinsun.com>
Fix gmtime so that it reports leap seconds when TZ
indicates that leap seconds are desired.
* time/gmtime.c (<stddef.h>): Remove unnecessary include.
(gmtime): Put after gmtime_r, to help the compiler inline.
(__tz_convert): New decl.
(gmtime_r): Use __tz_convert instead of __offtime,
so that leap seconds are handled correctly.
* time/localtime.c (<errno.h>, <libc-lock.h>): Remove includes that
are now unnecessary.
(__tzset_internal, __tz_compute, __tzfile_compute, __use_tzfile,
__tzset_lock): Remove extern decls that are now unnecessary.
(localtime_internal): Moved to __tz_convert in tzset.c.
so that localtime and gmtime can both use it easily.
(localtime): Put after localtime_r, to help the compiler inline.
(localtime_r): Use __tz_convert instead of localtime_internal.
* time/strftime.c (__tz_compute): Remove unused (and now incorrect)
decl.
* time/tzfile.c (__tzfile_compute): New arg USE_LOCALTIME.
* time/tzset.c (<errno.h>): Include.
(_tmbuf): New decl.
(__tzfile_compute): New function.
(tz_compute): Renamed from __tz_compute. No longer extern.
Remove redundant call to tzset_internal.
(tzset_internal): Renamed from __tzset_internal. No longer extern.
(tzset_lock): Renamed from __tzset_lock. No longer extern.
(__tz_convert): New function, containing functionality of old
localtime_internal function, plus locking and optional UTC.
1997-09-06 Paul Eggert <eggert@twinsun.com>
* time/tzfile.c (__tzfile_read): Don't read a file if TZ is the empty
string, just use UTC without leap seconds. This is for compatibility
with the Olson code.
1997-09-06 Paul Eggert <eggert@twinsun.com>
* time/tzset.c (__tzname_max): Lock tz data structures before
invoking tzset_internal.
* time/tzfile.c: Define compute_tzname_max statically.
1997-09-07 10:57 Thorsten Kukuk <kukuk@vt.uni-paderborn.de>
* nis/nis_call.c: Remove not longer necessary HAVE_SECURE_RPC ifdefs.
* nis/nis_intern.h: Likewise.
* nis/nss_nis/nis-publickey.c: Likewise.
* nis/nss_nisplus/nisplus-publickey.c: Likewise.
* nis/ypclnt.c: Likewise.
* sunrpc/auth_des.c: Don't dereference NULL pointer,
initialize ad->ad_timediff.
* sunrpc/auth_none.c: Don't define our own prototypes, use the one
from the header files.
* sunrpc/auth_unix.c: Likewise.
* sunrpc/clnt_raw.c: Likewise.
* sunrpc/clnt_tcp.c: Likewise.
* sunrpc/rpc_cmsg.c: Likewise.
* sunrpc/key_call.c: Fix signal handling.
* sunrpc/openchild.c: Don't use /bin/sh to start /usr/etc/keyenvoy,
or we will get a deadlock with NIS+.
* sunrpc/rpc/auth.h: Add prototype for xdr_opaque_auth, don't define
HAVE_SECURE_RPC.
1997-09-07 15:51 Ulrich Drepper <drepper@cygnus.com>
* sysdeps/i386/bits/select.h [__GNUC__] (__FD_ZERO, __FD_SET, __FD_CLR,
__FD_ISSET): Use correct casts to address array correctly.
Reported by urbanw@cs.umu.se.
1997-09-07 05:07 Ulrich Drepper <drepper@cygnus.com>
* elf/dl-close.c: Include <bits/libc-lock.h>, not <libc-lock.h>.
* elf/dl-open.c: Likewise.
* sysdeps/i386/memset.c: Undefine memset in case the header with the
optimized functions is included.
Patches by NIIBE Yutaka <gniibe@mri.co.jp>.
* sysdeps/i386/bits/string.h [__PIC__] (strcspn, strspn, strpbrk,
strsep): Use register for second parameter.
* sysdeps/i386/i486/bits/string.h: Likewise.
Reported by NIIBE Yutaka <gniibe@mri.co.jp>.
1997-09-03 09:48 Geoff Keating <geoffk@ozemail.com.au>
* math/libm-test.c: Change various tolerances to match what the
tested routines can actually provide.
* math/Makefile: Add new tests.
* math/atest-sincos.c: New file.
* math/atest-exp.c: New file.
* csu/Makefile: Give initfini.s and initfiniS.s their own
CFLAGS-* macros so they can be overridden.
* sysdeps/powerpc/Makefile [subdir=csu]: Override flags for
initfiniS.s to use -fpic instead of -fPIC, because the sed script
breaks otherwise.
* sysdeps/powerpc/Makefile [build-shared]: Use -fpic not -fPIC for
efficiency.
* sysdeps/powerpc/dl-machine.h (ELF_MACHINE_RUNTIME_TRAMPOLINE):
Don't use register 0, to let _mcount be in a shared object.
* sysdeps/powerpc/dl-machine.h: Use full sentences in comments.
Generally clean up. Suppress some code we don't need when relocating
ld.so.
* sysdeps/powerpc/test-arith.c: Change loop indices to size_t when
appropriate to suppress gcc warning.
* resolv/res_send.c: Suppress warning.
* sunrpc/xdr_sizeof.c: Suppress warning.
* FAQ: Add ppc-linux.
* manual/maint.texi: Add ppc-linux. Explain that gcc can't build it
yet.
* sysdeps/unix/sysv/linux/powerpc/profil-counter.h: Correct for
current kernels.
1997-08-15 07:45 Geoff Keating <geoffk@ozemail.com.au>
* stdlib/fmtmsg.c: Use two parameters for __libc_once_define.
* sysdeps/i386/machine-gmon.h: Correct typo.
* sysdeps/unix/sysv/linux/powerpc/bits/mman.h: Change to match
kernel.
* sysdeps/generic/dl-sysdep.c: Add hook for bizzare PPC argument hack.
* sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Rewrite to use
sysdeps/linux/dl-sysdep.c.
* sysdeps/powerpc/Makefile [subdir=gmon]: Compile ppc-mcount.
* sysdeps/powerpc/machine-gmon.h: Use ppc-mcount.
* sysdeps/powerpc/ppc-mcount: New file.
The following are mostly changes to allow profiling:
* sysdeps/powerpc/add_n.S: Added.
* sysdeps/powerpc/add_n.s: Removed.
* sysdeps/powerpc/addmul_1.S: Added.
* sysdeps/powerpc/addmul_1.s: Removed.
* sysdeps/powerpc/bsd-_setjmp.S: Use JUMPTARGET macro.
* sysdeps/powerpc/bsd-setjmp.S: Use JUMPTARGET macro.
* sysdeps/powerpc/lshift.S: Added.
* sysdeps/powerpc/lshift.s: Removed.
* sysdeps/powerpc/memset.S: Added.
* sysdeps/powerpc/memset.s: Removed.
* sysdeps/powerpc/mul_1.S: Added.
* sysdeps/powerpc/mul_1.s: Removed.
* sysdeps/powerpc/rshift.S: Added.
* sysdeps/powerpc/rshift.s: Removed.
* sysdeps/powerpc/s_copysign.S: Use ENTRY, END, weak_alias macros.
* sysdeps/powerpc/s_fabs.S: Use ENTRY, END, weak_alias macros.
* sysdeps/powerpc/setjmp.S: Use JUMPTARGET macro.
* sysdeps/powerpc/strchr.S: Added.
* sysdeps/powerpc/strchr.s: Removed.
* sysdeps/powerpc/strcmp.S: Added.
* sysdeps/powerpc/strcmp.s: Removed.
* sysdeps/powerpc/strlen.S: Added.
* sysdeps/powerpc/strlen.s: Removed.
* sysdeps/powerpc/sub_n.S: Added.
* sysdeps/powerpc/sub_n.s: Removed.
* sysdeps/powerpc/submul_1.S: Added.
* sysdeps/powerpc/submul_1.s: Removed.
* sysdeps/unix/sysv/linux/powerpc/_exit.S: Removed.
* sysdeps/unix/sysv/linux/powerpc/brk.S: Added.
* sysdeps/unix/sysv/linux/powerpc/brk.c: Removed.
* sysdeps/unix/sysv/linux/powerpc/clone.S: Use new macros. Fix
various bugs. Document that it isn't tested.
* sysdeps/unix/sysv/linux/powerpc/sigreturn.S: Make look like
sysdeps/unix/_exit.S.
* sysdeps/unix/sysv/linux/powerpc/socket.S: Use new macros.
* sysdeps/unix/sysv/linux/powerpc/syscall.S: Use new macros.
* sysdeps/unix/sysv/linux/powerpc/sysdep.h: Define some new macros
to make assembler (possibly) more portable, allow profiling, etc.
Diffstat (limited to 'sysdeps/powerpc/strcmp.s')
-rw-r--r-- | sysdeps/powerpc/strcmp.s | 273 |
1 files changed, 0 insertions, 273 deletions
diff --git a/sysdeps/powerpc/strcmp.s b/sysdeps/powerpc/strcmp.s deleted file mode 100644 index f901b82ab1..0000000000 --- a/sysdeps/powerpc/strcmp.s +++ /dev/null @@ -1,273 +0,0 @@ - # Optimized strcmp implementation for PowerPC. - # Copyright (C) 1997 Free Software Foundation, Inc. - # This file is part of the GNU C Library. - # - # 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. - - # See strlen.s for comments on how the end-of-string testing works. - - .section ".text" - .align 3 - .globl strcmp - .type strcmp,@function -strcmp: - # int [r3] strcmp (const char *p1 [r3], const char *p2 [r4]) - - # General register assignments: - # r0: temporary - # r3: pointer to previous word in s1 - # r4: pointer to previous word in s2 - # r5: current first word in s1 - # r6: current first word in s2 (after re-alignment) - # r7: 0xfefefeff - # r8: 0x7f7f7f7f - # r9: ~(word in s1 | 0x7f7f7f7f) - - # Register assignments in the prologue: - # r10: low 2 bits of p2-p1 - # r11: mask to orc with r5/r6 - - subf. %r10,%r4,%r3 - beq- equal - andi. %r10,%r10,3 - cmpi %cr1,%r10,2 - beq- %cr1,align2 - lis %r7,0xfeff - lis %r8,0x7f7f - addi %r8,%r8,0x7f7f - addi %r7,%r7,0xfffffeff - bgt- %cr1,align3 -strcmp3: - rlwinm %r0,%r3,3,27,28 - li %r11,-1 - srw %r11,%r11,%r0 - clrrwi %r3,%r3,2 - clrrwi %r4,%r4,2 - lwz %r5,0(%r3) - lwz %r6,0(%r4) - bne- align1 - - # The loop, case when both strings are aligned the same. - # on entry, cr1.eq must be 1. - # r10: second word in s1 - # r11: second word in s2 OR mask to orc with first two words. -align0: - andi. %r0,%r3,4 - orc %r5,%r5,%r11 - orc %r6,%r6,%r11 - beq+ a0start - add %r0,%r7,%r5 - nor %r9,%r8,%r5 - and. %r0,%r0,%r9 - cmplw %cr1,%r5,%r6 - subi %r3,%r3,4 - bne- endstringeq - subi %r4,%r4,4 - bne- %cr1,difference - -loopalign0: - lwzu %r5,8(%r3) - bne- %cr1,difference2 - lwzu %r6,8(%r4) -a0start: - add %r0,%r7,%r5 - nor %r9,%r8,%r5 - and. %r0,%r0,%r9 - cmplw %cr1,%r5,%r6 - lwz %r10,4(%r3) - bne- endstringeq - add %r0,%r7,%r10 - bne- %cr1,difference - nor %r9,%r8,%r10 - lwz %r11,4(%r4) - and. %r0,%r0,%r9 - cmplw %cr1,%r10,%r11 - beq+ loopalign0 - - mr %r5,%r10 - mr %r6,%r11 - - # fall through to... - -endstringeq: - # (like 'endstring', but an equality code is in cr1) - beq %cr1,equal -endstring: - # OK. We've hit the end of the string. We need to be careful that - # we don't compare two strings as different because of gunk beyond - # the end of the strings. We do it like this... - and %r0,%r8,%r5 - add %r0,%r0,%r8 - xor. %r10,%r5,%r6 - andc %r9,%r9,%r0 - cntlzw %r10,%r10 - cntlzw %r9,%r9 - addi %r9,%r9,7 - cmpw %cr1,%r9,%r10 - blt %cr1,equal - sub %r3,%r5,%r6 - bgelr+ - mr %r3,%r6 - blr -equal: li %r3,0 - blr - - # The loop, case when s2 is aligned 1 char behind s1. - # r10: current word in s2 (before re-alignment) - -align1: - cmpwi %cr1,%r0,0 - orc %r5,%r5,%r11 - bne %cr1,align1_123 - # When s1 is aligned to a word boundary, the startup processing is special. - slwi. %r6,%r6,24 - bne+ a1entry_0 - nor %r9,%r8,%r5 - b endstring - -align1_123: - # Otherwise (s1 not aligned to a word boundary): - mr %r10,%r6 - add %r0,%r7,%r5 - nor %r9,%r8,%r5 - and. %r0,%r0,%r9 - srwi %r6,%r6,8 - orc %r6,%r6,%r11 - cmplw %cr1,%r5,%r6 - bne- endstringeq - bne- %cr1,difference - -loopalign1: - slwi. %r6,%r10,24 - bne- %cr1,a1difference - lwzu %r5,4(%r3) - beq- endstring1 -a1entry_0: - lwzu %r10,4(%r4) -a1entry_123: - add %r0,%r7,%r5 - nor %r9,%r8,%r5 - and. %r0,%r0,%r9 - rlwimi %r6,%r10,24,8,31 - cmplw %cr1,%r5,%r6 - beq+ loopalign1 - b endstringeq - -endstring1: - srwi %r3,%r5,24 - blr - -a1difference: - lbz %r6,-1(%r4) - slwi %r6,%r6,24 - rlwimi %r6,%r10,24,8,31 - - # fall through to... - -difference: - # The idea here is that we could just return '%r5 - %r6', except - # that the result might overflow. Overflow can only happen when %r5 - # and %r6 have different signs (thus the xor), in which case we want to - # return negative iff %r6 has its high bit set so %r5 < %r6. - # A branch-free implementation of this is - # xor %r0,%r5,%r6 - # rlwinm %r0,%r0,1,31,31 - # rlwnm %r5,%r5,%r0,1,31 - # rlwnm %r6,%r6,%r0,1,31 - # sub %r3,%r5,%r6 - # blr - # but this is usually more expensive. - xor. %r0,%r5,%r6 - sub %r3,%r5,%r6 - bgelr+ - mr %r3,%r6 - blr - -difference2: - # As for 'difference', but use registers r10 and r11 instead of r5 and r6. - xor. %r0,%r10,%r11 - sub %r3,%r10,%r11 - bgelr+ - mr %r3,%r11 - blr - - # For the case when s2 is aligned 3 chars behind s1, we switch - # s1 and s2... - # r10: used by 'align2' (see below) - # r11: used by 'align2' (see below) - # r12: saved link register - # cr0.eq: must be left as 1. - -align3: mflr %r12 - mr %r0,%r3 - mr %r3,%r4 - mr %r4,%r0 - bl strcmp3 - mtlr %r12 - neg %r3,%r3 - blr - - # The loop, case when s2 and s1's alignments differ by 2 - # This is the ugly case... - # FIXME: on a 601, the loop takes 7 cycles instead of the 6 you'd expect, - # because there are too many branches. This loop should probably be - # coded like the align1 case. - -a2even: lhz %r5,0(%r3) - lhz %r6,0(%r4) - b a2entry - -align2: - andi. %r0,%r3,1 - beq+ a2even - subi %r3,%r3,1 - subi %r4,%r4,1 - lbz %r5,1(%r3) - lbz %r6,1(%r4) - cmpwi %cr0,%r5,0 - cmpw %cr1,%r5,%r6 - beq- align2end2 - lhzu %r5,2(%r3) - beq+ %cr1,a2entry1 - lbz %r5,-1(%r3) - sub %r3,%r5,%r6 - blr - -loopalign2: - cmpw %cr1,%r5,%r6 - beq- align2end2 - lhzu %r5,2(%r3) - bne- %cr1,align2different -a2entry1: - lhzu %r6,2(%r4) -a2entry: - cmpwi %cr5,%r5,0x00ff - andi. %r0,%r5,0x00ff - bgt+ %cr5,loopalign2 - -align2end: - andi. %r3,%r6,0xff00 - neg %r3,%r3 - blr - -align2different: - lhzu %r5,-2(%r3) -align2end2: - sub %r3,%r5,%r6 - blr - -0: - .size strcmp,0b-strcmp |