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* sysdeps/alpha/fpu/s_cacoshf.c: Likewise. * sysdeps/alpha/fpu/s_casinf.c: Likewise. * sysdeps/alpha/fpu/s_casinhf.c: Likewise. * sysdeps/alpha/fpu/s_catanf.c: Likewise. * sysdeps/alpha/fpu/s_catanhf.c: Likewise. * sysdeps/alpha/fpu/s_ccosf.c: Likewise. * sysdeps/alpha/fpu/s_ccoshf.c: Likewise. * sysdeps/alpha/fpu/s_cexpf.c: Likewise. * sysdeps/alpha/fpu/s_clog10f.c: Likewise. * sysdeps/alpha/fpu/s_clogf.c: Likewise. * sysdeps/alpha/fpu/s_cpowf.c: Likewise. * sysdeps/alpha/fpu/s_cprojf.c: Likewise. * sysdeps/alpha/fpu/s_csinf.c: Likewise. * sysdeps/alpha/fpu/s_csinhf.c: Likewise. * sysdeps/alpha/fpu/s_csqrtf.c: Likewise. * sysdeps/alpha/fpu/s_ctanf.c: Likewise. * sysdeps/alpha/fpu/s_ctanhf.c: Likewise. * sysdeps/alpha/libc-tls.c: Likewise. * sysdeps/gnu/glob64.c: Likewise. * sysdeps/gnu/updwtmp.c: Likewise. * sysdeps/gnu/utmp_file.c: Likewise. * sysdeps/i386/bzero.c: Likewise. * sysdeps/i386/ffs.c: Likewise. * sysdeps/i386/i686/ffs.c: Likewise. * sysdeps/i386/memset.c: Likewise. * sysdeps/ia64/fpu/printf_fphex.c: Likewise. * sysdeps/ia64/libc-tls.c: Likewise. * sysdeps/ieee754/ldbl-128/printf_fphex.c: Likewise. * sysdeps/m68k/ffs.c: Likewise. * sysdeps/mach/hurd/getdents.c: Likewise. * sysdeps/mach/hurd/init-posix.c: Likewise. * sysdeps/mach/msync.c: Likewise. * sysdeps/mips/libc-tls.c: Likewise. * sysdeps/posix/profil.c: Likewise. * sysdeps/posix/shm_open.c: Likewise. * sysdeps/posix/shm_unlink.c: Likewise. * sysdeps/posix/sprofil.c: Likewise. * sysdeps/powerpc/ffs.c: Likewise. * sysdeps/rs6000/ffs.c: Likewise. * sysdeps/s390/libc-tls.c: Likewise. * sysdeps/unix/sysv/linux/aio_sigqueue.c: Likewise. * sysdeps/unix/sysv/linux/alpha/glob.c: Likewise. * sysdeps/unix/sysv/linux/alpha/wordexp.c: Likewise. * sysdeps/unix/sysv/linux/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/gai_sigqueue.c: Likewise. * sysdeps/unix/sysv/linux/i386/getmsg.c: Likewise. * sysdeps/unix/sysv/linux/i386/getresgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/getresuid.c: Likewise. * sysdeps/unix/sysv/linux/i386/lchown.c: Likewise. * sysdeps/unix/sysv/linux/i386/putmsg.c: Likewise. * sysdeps/unix/sysv/linux/i386/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/i386/setresgid.c: Likewise. * sysdeps/unix/sysv/linux/i386/setresuid.c: Likewise. * sysdeps/unix/sysv/linux/ia64/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/mips/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/mips/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/mips/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/mq_close.c: Likewise. * sysdeps/unix/sysv/linux/mq_getattr.c: Likewise. * sysdeps/unix/sysv/linux/mq_notify.c: Likewise. * sysdeps/unix/sysv/linux/mq_open.c: Likewise. * sysdeps/unix/sysv/linux/mq_receive.c: Likewise. * sysdeps/unix/sysv/linux/mq_send.c: Likewise. * sysdeps/unix/sysv/linux/mq_unlink.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/ftruncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/s390/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/sched_getaffinity.c: Likewise. * sysdeps/unix/sysv/linux/sched_setaffinity.c: Likewise. * sysdeps/unix/sysv/linux/sigqueue.c: Likewise. * sysdeps/unix/sysv/linux/sigstack.c: Likewise. * sysdeps/unix/sysv/linux/sigtimedwait.c: Likewise. * sysdeps/unix/sysv/linux/sigwaitinfo.c: Likewise. * sysdeps/unix/sysv/linux/sparc/readelflib.c: Likewise. * sysdeps/unix/sysv/linux/truncate64.c: Likewise. * sysdeps/unix/sysv/linux/vfork.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/readelflib.c: Likewise.
84 lines
2.4 KiB
C
84 lines
2.4 KiB
C
/* bzero -- set a block of memory to zero. For Intel 80x86, x>=3.
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This file is part of the GNU C Library.
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Copyright (C) 1991,92,93,97,98,99, 05 Free Software Foundation, Inc.
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Contributed by Torbjorn Granlund (tege@sics.se).
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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 <string.h>
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#include <memcopy.h>
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#undef bzero
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#undef __bzero
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#ifdef __GNUC__
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void
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__bzero (dstpp, len)
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void *dstpp;
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size_t len;
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{
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/* N.B.: This code is almost verbatim from memset.c. */
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int d0;
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unsigned long int dstp = (unsigned long int) dstpp;
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/* This explicit register allocation
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improves code very much indeed. */
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register op_t x asm ("ax");
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x = 0;
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/* Clear the direction flag, so filling will move forward. */
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asm volatile ("cld");
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/* This threshold value is optimal. */
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if (len >= 12)
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{
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/* Adjust LEN for the bytes handled in the first loop. */
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len -= (-dstp) % OPSIZ;
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/* There are at least some bytes to set.
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No need to test for LEN == 0 in this alignment loop. */
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/* Fill bytes until DSTP is aligned on a longword boundary. */
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asm volatile ("rep\n"
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"stosb" /* %0, %2, %3 */ :
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"=D" (dstp), "=c" (d0) :
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"0" (dstp), "1" ((-dstp) % OPSIZ), "a" (x) :
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"memory");
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/* Fill longwords. */
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asm volatile ("rep\n"
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"stosl" /* %0, %2, %3 */ :
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"=D" (dstp), "=c" (d0) :
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"0" (dstp), "1" (len / OPSIZ), "a" (x) :
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"memory");
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len %= OPSIZ;
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}
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/* Write the last few bytes. */
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asm volatile ("rep\n"
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"stosb" /* %0, %2, %3 */ :
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"=D" (dstp), "=c" (d0) :
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"0" (dstp), "c" (len), "a" (x) :
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"memory");
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}
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weak_alias (__bzero, bzero)
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#else
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#include <string/bzero.c>
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#endif
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