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37ba7d6663
2002-08-02 Ulrich Drepper <drepper@redhat.com> * configure.in (HAVE_BROKEN_ALIAS_ATTRIBUTE): Add check for broken alias attribute handling. * config.h.in (HAVE_BROKEN_ALIAS_ATTRIBUTE): Add. * assert/assert.c (__assert_fail): Fix typo in comment. * include/rpc/rpc.h: Declare __libc_tsd_RPC_VARS if USE_TLS && HAVE___THREAD. * sunrpc/rpc_thread.c: Don't define __libc_tsd_RPC_VARS as static if USE_TLS && HAVE___THREAD. * sunrpc/Versions [libc] (GLIBC_PRIVATE): Export __libc_tsd_RPC_VARS. 2002-08-02 Jakub Jelinek <jakub@redhat.com> * assert/assert.c (__assert_fail): Remove undef. Replace INTDEF with libc_hidden_def. * assert/__assert.c (__assert): Remove INTUSE. * elf/dl-minimal.c (__assert_fail): Replace INTDEF with libc_hidden_weak. * include/libc-symbols.h (hidden_proto, hidden_def, hidden_weak, hidden_ver, libc_hidden_proto, libc_hidden_def, libc_hidden_weak, libc_hidden_ver, rtld_hidden_proto, rtld_hidden_def, rtld_hidden_weak, rltd_hidden_ver, libm_hidden_proto, libm_hidden_def, libm_hidden_weak, libm_hiden_ver): Define. * include/assert.h (__assert_fail_internal): Remove. (__assert_fail): Add prototype. Add hidden_proto. * include/libc-internal.h (__libc_freeres, __profile_frequency): Add libc_hidden_proto. * include/wchar.h (__mbrtowc_internal, __mbrlen_internal): Remove. (__mbrtowc, __mbrlen): Use libc_hidden_proto. Remove macros. * include/string.h (__mempcpy, __stpncpy, __rawmemchr, __strcasecmp): Add libc_hidden_proto. * include/fcntl.h (__open64, __libc_open, __libc_fcntl, __open, __fcntl): Add libc_hidden_proto. Remove macros. (__open_internal, __fcntl_internal): Remove. * libio/iofdopen.c (_IO_fcntl): Remove INTUSE from __fcntl. * malloc/set-freeres.c (__libc_freeres): Add libc_hidden_def. * nss/nsswitch.h (__nss_database_lookup, __nss_next): Add libc_hiden_proto. * nss/nsswitch.c (__nss_database_lookup, __nss_next): Add libc_hidden_def. * sysdeps/generic/mempcpy.c (__mempcpy): Remove undef. Add libc_hidden_def. * sysdeps/generic/open64.c (__open64): Add libc_hidden_def. * sysdeps/generic/open.c (__open): Remove undef. Add libc_hidden_def. Remove INTDEF. * sysdeps/generic/fcntl.c (__fcntl): Remove undef. Add libc_hidden_def. * sysdeps/mach/hurd/fcntl.c (__fcntl): Likewise. * sysdeps/i386/i586/mempcpy.S (__mempcpy): Add libc_hidden_def. * sysdeps/i386/i686/mempcpy.S (__mempcpy): Likewise. * sysdeps/mach/hurd/fcntl.c (__libc_fcntl, __fcntl): Remove undef. (__fcntl): Remove INTDEF2. Add libc_hidden_weak. (__libc_fcntl): Add libc_hidden_def. * sysdeps/mach/hurd/open.c (__libc_open, __open): Remove undef. (__open): Remove INTDEF2. Add libc_hidden_weak. (__libc_open): Add libc_hidden_def. * sysdeps/posix/open64.c (__open64): Add libc_hidden_weak. * sysdeps/standalone/open.c (__open): Add libc_hidden_def. * sysdeps/unix/sysv/aix/fcntl.c (__libc_fcntl, __fcntl): Remove undef. Add libc_hidden_def. * sysdeps/unix/sysv/aix/open.c (__libc_open, __open): Remove undef. Add libc_hidden_def. * sysdeps/unix/sysv/linux/i386/fcntl.c (__libc_fcntl, __fcntl): Remove undef. (__fcntl): Remove INTDEF2. Add libc_hidden_weak. (__libc_fcntl): Add libc_hidden_def. * sysdeps/unix/sysv/linux/syscalls.list (__fcntl_internal, __getpgid_internal, __chown_internal): Remove. (__GI___fcntl, __GI___libc_fcntl, __GI___getpgid, __GI___pipe, __GI___sched_setscheduler, __GI___select, __GI___setpgid, __GI___chown): Add. * sysdeps/unix/syscalls.list (__close_internal, __dup2_internal, __getpid_internal, __open_internal, __write_internal): Remove. (__GI___fcntl, __GI___libc_fcntl, __GI___open, __GI___libc_open, __GI___chown, __GI___close, __GI___dup2, __GI___getpid, __GI___libc_open, __GI___open, __GI___read, __GI___libc_read, __GI___select, __GI___statfs, __GI___write, __GI___libc_write): Add. * wcsmbs/mbrlen.c (__mbrlen): Remove undef. Replace INTDEF with libc_hidden_def. * wcsmbs/mbrtowc.c (__mbrtowc): Likewise. * catgets/catgetsinfo.h (__open_catalog): Add libc_hidden_proto. * catgets/open_catalog.c (__open_catalog): Add libc_hidden_def. * elf/dl-profile.c (__profile_frequency): Add libc_hidden_proto. * include/rpc/rpc.h (__rpc_thread_svc_fdset, __rpc_thread_createerr): Add libc_hidden_proto. * include/sys/poll.h (__poll): Add libc_hidden_proto. * include/sys/select.h (__select): Likewise. * include/sys/socket.h (__send): Likewise. * include/sys/statfs.h (__statfs): Likewise. * include/unistd.h (__pwrite64, __libc_read, __pipe, __chown, __dup2, __getpid, __getpgid, __setpgid, __close, __read, __write, __getpagesize, __sbrk): Likewise. (__chown_internal, __dup2_internal, __getpid_internal, __getpgid_internal, __close_internal, __write_internal, __getpagesize_internal): Remove. (__close, __dup2, __getpagesize, __getpgid, __getpid, __libc_write): Remove macros. * include/printf.h (__printf_fp): Add libc_hidden_proto. * include/sched.h (__sched_setscheduler): Likewise. * include/resolv.h (__res_ninit, __res_randomid): Likewise. * include/stdlib.h (__secure_getenv): Likewise. * include/signal.h (__sigaction, __sigsuspend): Likewise. * inet/getaliasent_r.c (NSS_attribute_hidden): Remove. * inet/getaliasname_r.c (NSS_attribute_hidden): Remove. * inet/getnetbyad_r.c (NSS_attribute_hidden): Remove. * inet/getnetbynm_r.c (NSS_attribute_hidden): Remove. * inet/getnetent_r.c (NSS_attribute_hidden): Remove. * inet/getproto_r.c (NSS_attribute_hidden): Remove. * inet/getprtent_r.c (NSS_attribute_hidden): Remove. * inet/getprtname_r.c (NSS_attribute_hidden): Remove. * inet/getrpcbyname_r.c (NSS_attribute_hidden): Remove. * inet/getrpcbynumber_r.c (NSS_attribute_hidden): Remove. * inet/getrpcent_r.c (NSS_attribute_hidden): Remove. * inet/getservent_r.c (NSS_attribute_hidden): Remove. * inet/getsrvbynm_r.c (NSS_attribute_hidden): Remove. * inet/getsrvbypt_r.c (NSS_attribute_hidden): Remove. * inet/gethstbyad_r.c (DB_LOOKUP_FCT): Remove INTUSE. * inet/gethstbynm2_r.c (DB_LOOKUP_FCT): Likewise. * inet/gethstbynm_r.c (DB_LOOKUP_FCT): Likewise. * inet/gethstent_r.c (DB_LOOKUP_FCT): Likewise. * libio/genops.c (__overflow): Add libc_hidden_def. * libio/iovdprintf.c: Remove libio.h include. * libio/libioP.h (libc_hidden_proto, libc_hidden_def, libc_hidden_weak): Define to nothing if not defined. (__overflow, __woverflow): Add libc_hidden_proto. * libio/wgenops.c (__woverflow): Add libc_hidden_def. * nss/getXXent_r.c (NSS_attribute_hidden): Remove. (DB_LOOKUP_FCT): Add libc_hidden_proto. * nss/getXXbyYY_r.c (NSS_attribute_hidden): Remove. (DB_LOOKUP_FCT): Add libc_hidden_proto. * nss/XXX-lookup.c (DB_LOOKUP_FCT): Add libc_hidden_proto and libc_hidden_def. * nss/hosts-lookup.c (__nss_hosts_lookup): Remove INTDEF. * posix/bsd-getpgrp.c (__getpgid_internal): Remove. (__getpgid): Add libc_hidden_proto. (__bsd_getpgrp): Remove INTUSE. * resolv/res_init.c (__res_ninit, __res_randomid): Add libc_hidden_def. * shadow/getspent_r.c (NSS_attribute_hidden): Remove. * shadow/getspnam_r.c (NSS_attribute_hidden): Remove. * stdio-common/printf_fp.c (__printf_fp): Add libc_hidden_def. * stdlib/strfmon.c (__printf_fp): Add libc_hidden_proto. * stdlib/secure-getenv.c (__secure_getenv): Add libc_hidden_def. * sunrpc/rpc_thread.c (__rpc_thread_svc_fdset, __rpc_thread_createerr): Add libc_hidden_def. * sysdeps/alpha/alphaev67/rawmemchr.S (__rawmemchr): Add libc_hidden_def. * sysdeps/alpha/alphaev67/stpncpy.S (__stpncpy): Likewise. * sysdeps/alpha/rawmemchr.S (__rawmemchr): Likewise. * sysdeps/alpha/stpncpy.S (__stpncpy): Likewise. * sysdeps/generic/chown.c (__chown): Likewise. * sysdeps/generic/close.c (__close): Likewise. * sysdeps/generic/dup2.c (__dup2): Likewise. * sysdeps/generic/pipe.c (__pipe): Likewise. * sysdeps/generic/prof-freq.c (__profile_frequency): Likewise. * sysdeps/generic/pwrite64.c (__pwrite64): Likewise. * sysdeps/generic/rawmemchr.c (__rawmemchr): Likewise. * sysdeps/generic/read.c (__libc_read): Likewise. (__read): Add libc_hidden_weak. * sysdeps/generic/sbrk.c (__sbrk): Add libc_hidden_def. * sysdeps/generic/sched_sets.c (__sched_setscheduler): Likewise. * sysdeps/generic/select.c (__select): Likewise. * sysdeps/generic/send.c (__send): Likewise. * sysdeps/generic/setpgid.c (__setpgid): Likewise. * sysdeps/generic/sigaction.c (__sigaction): Likewise. * sysdeps/generic/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/generic/statfs.c (__statfs): Likewise. * sysdeps/generic/stpncpy.c (__stpncpy): Likewise. * sysdeps/generic/strcasecmp.c (__strcasecmp): Likewise. * sysdeps/generic/getpagesize.c (__getpagesize): Likewise. Remove undef and INTDEF. * sysdeps/generic/getpgid.c (__getpgid): Likewise. * sysdeps/generic/getpid.c (__getpid): Likewise. * sysdeps/generic/write.c (__libc_write): Likewise. (__write): Add libc_hidden_weak. Remove undef and INTDEF. * sysdeps/i386/rawmemchr.S (__rawmemchr): Add libc_hidden_def. * sysdeps/i386/stpncpy.S (__stpncpy): Likewise. * sysdeps/m68k/rawmemchr.S (__rawmemchr): Likewise. * sysdeps/mach/hurd/chown.c (__chown): Likewise. Remove INTDEF. * sysdeps/mach/hurd/close.c (__close): Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/mach/hurd/dup2.c (__dup2): Likewise. * sysdeps/mach/hurd/getpgid.c (__getpgid): Likewise. * sysdeps/mach/hurd/getpid.c (__getpid): Likewise. * sysdeps/mach/getpagesize.c (__getpagesize): Likewise. * sysdeps/mach/hurd/write.c (__libc_write): Likewise. (__write): Add libc_hidden_weak. Remove undef and INTDEF. * sysdeps/mach/hurd/pipe.c: Include unistd.h. (__pipe): Add libc_hidden_def. * sysdeps/mach/hurd/dl-sysdep.c (__libc_read, __libc_write): Add libc_hidden_weak. * sysdeps/mach/hurd/poll.c (__poll): Add libc_hidden_def. * sysdeps/mach/hurd/profil.c (__profile_frequency): Likewise. * sysdeps/mach/hurd/read.c (__libc_read): Likewise. (__read): Add libc_hidden_weak. * sysdeps/mach/hurd/pwrite64.c (__pwrite64): Likewise. (__libc_pwrite64): Add libc_hidden_def. * sysdeps/mach/hurd/sbrk.c (__sbrk): Likewise. * sysdeps/mach/hurd/select.c (__select): Likewise. * sysdeps/mach/hurd/send.c (__send): Likewise. * sysdeps/mach/hurd/setpgid.c (__setpgid): Likewise. * sysdeps/mach/hurd/sigaction.c (__sigaction): Likewise. * sysdeps/mach/hurd/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/mach/hurd/statfs.c (__statfs): Likewise. * sysdeps/posix/dup2.c: Likewise. Remove undef and INTDEF. * sysdeps/posix/getpagesize.c (__getpagesize): Likewise. * sysdeps/posix/pwrite64.c (__libc_pwrite64): Add libc_hidden_def. (__pwrite64): Add libc_hidden_weak. * sysdeps/posix/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/sparc/sparc64/rawmemchr.S (__rawmemchr): Likewise. * sysdeps/sparc/sparc64/stpncpy.S (__stpncpy): Likewise. * sysdeps/standalone/close.c (__close): Likewise. * sysdeps/standalone/write.c (__libc_write): Likewise. (__write): Add libc_hidden_weak. * sysdeps/standalone/read.c (__read): Likewise. (__libc_read): Add libc_hidden_def. * sysdeps/unix/grantpt.c (grantpt): Remove INTUSE. * sysdeps/unix/bsd/m68k/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/bsd/osf/alpha/pipe.S (__pipe): Likewise. * sysdeps/unix/bsd/vax/pipe.S (__pipe): Likewise. * sysdeps/unix/bsd/syscalls.list (__GI___getpagesize): Likewise. * sysdeps/unix/bsd/poll.c (__poll): Likewise. * sysdeps/unix/bsd/sigaction.c (__sigaction): Likewise. * sysdeps/unix/bsd/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/common/syscalls.list (__GI___getpgid, __GI___setpgid, __GI___sigaction): Add. * sysdeps/unix/i386/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/inet/syscalls.list (__GI___send): Add. * sysdeps/unix/mips/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sparc/pipe.S (__pipe): Likewise. * sysdeps/unix/sysv/irix4/syscalls.list (__GI___getpgid, __GI___setpgid): Add. * sysdeps/unix/sysv/aix/chown.c (__chown): Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/unix/sysv/aix/getpgid.c (__getpgid): Likewise. * sysdeps/unix/sysv/aix/write.c (__write, __libc_write): Likewise. * sysdeps/unix/sysv/aix/close.c (__close): Add libc_hidden_def. * sysdeps/unix/sysv/aix/getpid.c (__getpid): Likewise. * sysdeps/unix/sysv/aix/pipe.c (__pipe): Likewise. * sysdeps/unix/sysv/aix/read.c (__read, __libc_read): Likewise. * sysdeps/unix/sysv/aix/poll.c (__poll): Likewise. * sysdeps/unix/sysv/aix/sbrk.c (__sbrk): Likewise. * sysdeps/unix/sysv/aix/sigaction.c (__sigaction): Likewise. * sysdeps/unix/sysv/aix/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/sysv/aix/statfs.c (__statfs): Likewise. * sysdeps/unix/sysv/aix/select.c (__select): Likewise. * sysdeps/unix/sysv/aix/setpgid.c (__setpgid): Likewise. * sysdeps/unix/sysv/linux/alpha/pipe.S (__pipe): Likewise. * sysdeps/unix/sysv/linux/alpha/syscalls.list (__GI___pwrite64, __GI___statfs, __GI___send): Add. * sysdeps/unix/sysv/linux/alpha/select.S (__select): Add libc_hidden_ver resp. libc_hidden_def. * sysdeps/unix/sysv/linux/alpha/sigsuspend.S (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/linux/ia64/getpagesize.c (__getpagesize): Likewise. Remove undef and INTDEF. * sysdeps/unix/sysv/linux/ia64/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sysv/linux/ia64/syscalls.list (__GI___pwrite64, __GI___statfs, __GI___send): Add. * sysdeps/unix/sysv/linux/ia64/sigaction.c (__sigaction): Add libc_hidden_def. * sysdeps/unix/sysv/linux/ia64/sigsuspend.c (__sigsuspend): Likewise. * sysdeps/unix/sysv/linux/sh/pipe.S (__pipe): Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/chown.c (__chown): Add libc_hidden_ver resp. libc_hidden_def. * sysdeps/unix/sysv/linux/s390/s390-64/syscalls.list (__GI___pwrite64, __GI___send): Add. * sysdeps/unix/sysv/linux/s390/s390-64/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/s390/s390-64/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/linux/hppa/syscalls.list (__GI___send): Add. * sysdeps/unix/sysv/linux/arm/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/i386/chown.c (__chown): Add libc_hidden_ver resp. libc_hidden_def. * sysdeps/unix/sysv/linux/i386/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/m68k/chown.c (__chown): Likewise. Remove INTDEF. * sysdeps/unix/sysv/linux/m68k/getpagesize.c (__getpagesize): Likewise. Remove undef. * sysdeps/unix/sysv/linux/mips/pwrite64.c (__pwrite64): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/mips/syscalls.list (__GI___send): Add. * sysdeps/unix/sysv/linux/mips/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/powerpc/chown.c (__chown): Add libc_hidden_def. * sysdeps/unix/sysv/linux/powerpc/pwrite64.c (__pwrite64): Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/getpagesize.c (__getpagesize): Likewise. Remove undef and INTDEF. * sysdeps/unix/sysv/linux/sparc/sparc32/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sysv/linux/sparc/sparc32/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/sparc/sparc64/pipe.S (__pipe): Add libc_hidden_def. * sysdeps/unix/sysv/linux/sparc/sparc64/syscalls.list (__GI___pwrite64, __GI___statfs, __GI___select, __GI___send): Add. * sysdeps/unix/sysv/linux/sparc/sparc64/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/sparc/sparc64/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/linux/x86_64/syscalls.list (__GI___pwrite64, __GI___statfs): Add. * sysdeps/unix/sysv/linux/x86_64/send.c (__send): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/x86_64/sigaction.c (__sigaction): Likewise. * sysdeps/unix/sysv/linux/getpagesize.c: Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/unix/sysv/linux/poll.c (__poll): Add libc_hidden_def. * sysdeps/unix/sysv/linux/pwrite64.c (__pwrite64): Add libc_hidden_def. * sysdeps/unix/sysv/linux/send.S (__send): Likewise. * sysdeps/unix/sysv/linux/sigaction.c (__sigaction): Add libc_hidden_weak. * sysdeps/unix/sysv/linux/sigsuspend.c (__sigsuspend): Add libc_hidden_def. * sysdeps/unix/sysv/sco3.2.4/__setpgid.c (__setpgid): Likewise. * sysdeps/unix/sysv/sco3.2.4/sigaction.S (__sigaction): Likewise. * sysdeps/unix/sysv/sysv4/solaris2/syscalls.list (__GI___sigaction): Add. * sysdeps/unix/sysv/sysv4/__getpgid.c (__getpgid): Add libc_hidden_def. Remove undef and INTDEF. * sysdeps/unix/sysv/sysv4/getpgid.c (__getpgid): Likewise. * sysdeps/unix/sysv/sysv4/__setpgid.c (__setpgid): Add libc_hidden_def. * sysdeps/unix/sysv/sysv4/setpgid.c (__setpgid): Likewise. * sysdeps/unix/sysv/sysv4/sigaction.c (__sigaction): Likewise. * sysdeps/unix/sysv/sigaction.c (__sigaction): Likewise. * sysdeps/unix/getpagesize.c (__getpagesize): Add libc_hidden_def. Remove undef and INTDEF. * configure.in (HAVE_BROKEN_VISIBILITY_ATTRIBUTE): Add check for broken visibility attribute handling. * config.h.in (HAVE_BROKEN_VISIBILITY_ATTRIBUTE): Add. 2002-08-02 Ulrich Drepper <drepper@redhat.com>
181 lines
5.0 KiB
ArmAsm
181 lines
5.0 KiB
ArmAsm
/* rawmemchr (str, ch) -- Return pointer to first occurrence of CH in STR.
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For Motorola 68000.
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Copyright (C) 1999, 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Andreas Schwab <schwab@gnu.org>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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TEXT
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ENTRY(__rawmemchr)
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/* Save the callee-saved registers we use. */
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movel R(d2),MEM_PREDEC(sp)
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movel R(d3),MEM_PREDEC(sp)
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/* Get string pointer and character. */
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movel MEM_DISP(sp,12),R(a0)
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moveb MEM_DISP(sp,19),R(d0)
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/* Distribute the character to all bytes of a longword. */
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movel R(d0),R(d1)
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lsll #8,R(d1)
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moveb R(d0),R(d1)
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movel R(d1),R(d0)
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swap R(d0)
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movew R(d1),R(d0)
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/* First search for the character one byte at a time until the
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pointer is aligned to a longword boundary. */
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movel R(a0),R(d1)
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andw #3,R(d1)
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beq L(L1)
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cmpb MEM(a0),R(d0)
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beq L(L9)
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addql #1,R(a0)
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movel R(a0),R(d1)
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andw #3,R(d1)
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beq L(L1)
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cmpb MEM(a0),R(d0)
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beq L(L9)
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addql #1,R(a0)
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movel R(a0),R(d1)
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andw #3,R(d1)
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beq L(L1)
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cmpb MEM(a0),R(d0)
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beq L(L9)
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addql #1,R(a0)
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L(L1:)
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/* Load the magic bits. Unlike the generic implementation we can
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use the carry bit as the fourth hole. */
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movel #0xfefefeff,R(d3)
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/* We exit the loop if adding MAGIC_BITS to LONGWORD fails to
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change any of the hole bits of LONGWORD.
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1) Is this safe? Will it catch all the zero bytes?
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Suppose there is a byte with all zeros. Any carry bits
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propagating from its left will fall into the hole at its
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least significant bit and stop. Since there will be no
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carry from its most significant bit, the LSB of the
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byte to the left will be unchanged, and the zero will be
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detected.
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2) Is this worthwhile? Will it ignore everything except
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zero bytes? Suppose every byte of LONGWORD has a bit set
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somewhere. There will be a carry into bit 8. If bit 8
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is set, this will carry into bit 16. If bit 8 is clear,
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one of bits 9-15 must be set, so there will be a carry
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into bit 16. Similarly, there will be a carry into bit
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24. If one of bits 24-31 is set, there will be a carry
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into bit 32 (=carry flag), so all of the hole bits will
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be changed.
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3) But wait! Aren't we looking for C, not zero?
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Good point. So what we do is XOR LONGWORD with a longword,
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each of whose bytes is C. This turns each byte that is C
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into a zero. */
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L(L2:)
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/* Get the longword in question. */
|
|
movel MEM_POSTINC(a0),R(d1)
|
|
/* XOR with the byte we search for. */
|
|
eorl R(d0),R(d1)
|
|
|
|
/* Add the magic value. We get carry bits reported for each byte
|
|
which is not C. */
|
|
movel R(d3),R(d2)
|
|
addl R(d1),R(d2)
|
|
|
|
/* Check the fourth carry bit before it is clobbered by the next
|
|
XOR. If it is not set we have a hit. */
|
|
bcc L(L8)
|
|
|
|
/* We are only interested in carry bits that change due to the
|
|
previous add, so remove original bits. */
|
|
eorl R(d1),R(d2)
|
|
|
|
/* Now test for the other three overflow bits.
|
|
Set all non-carry bits. */
|
|
orl R(d3),R(d2)
|
|
/* Add 1 to get zero if all carry bits were set. */
|
|
addql #1,R(d2)
|
|
|
|
/* If we don't get zero then at least one byte of the word equals
|
|
C. */
|
|
bne L(L8)
|
|
|
|
/* Get the longword in question. */
|
|
movel MEM_POSTINC(a0),R(d1)
|
|
/* XOR with the byte we search for. */
|
|
eorl R(d0),R(d1)
|
|
|
|
/* Add the magic value. We get carry bits reported for each byte
|
|
which is not C. */
|
|
movel R(d3),R(d2)
|
|
addl R(d1),R(d2)
|
|
|
|
/* Check the fourth carry bit before it is clobbered by the next
|
|
XOR. If it is not set we have a hit. */
|
|
bcc L(L8)
|
|
|
|
/* We are only interested in carry bits that change due to the
|
|
previous add, so remove original bits */
|
|
eorl R(d1),R(d2)
|
|
|
|
/* Now test for the other three overflow bits.
|
|
Set all non-carry bits. */
|
|
orl R(d3),R(d2)
|
|
/* Add 1 to get zero if all carry bits were set. */
|
|
addql #1,R(d2)
|
|
|
|
/* If we don't get zero then at least one byte of the word equals
|
|
C. */
|
|
beq L(L2)
|
|
|
|
L(L8:)
|
|
/* We have a hit. Check to see which byte it was. First
|
|
compensate for the autoincrement in the loop. */
|
|
subql #4,R(a0)
|
|
|
|
cmpb MEM(a0),R(d0)
|
|
beq L(L9)
|
|
addql #1,R(a0)
|
|
|
|
cmpb MEM(a0),R(d0)
|
|
beq L(L9)
|
|
addql #1,R(a0)
|
|
|
|
cmpb MEM(a0),R(d0)
|
|
beq L(L9)
|
|
addql #1,R(a0)
|
|
|
|
/* Otherwise the fourth byte must equal C. */
|
|
L(L9:)
|
|
movel R(a0),R(d0)
|
|
movel MEM_POSTINC(sp),R(d3)
|
|
movel MEM_POSTINC(sp),R(d2)
|
|
rts
|
|
END(__rawmemchr)
|
|
|
|
libc_hidden_def (__rawmemchr)
|
|
weak_alias (__rawmemchr, rawmemchr)
|