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1997-04-01 00:37 Ulrich Drepper <drepper@cygnus.com> * math/Makefile: Prevent inlining for test-{float,double,longdouble}. * math/libm-test.c (initialize): Make strings unique and force values to memory. * posix/regex.c: Debug debugging code. * sysdeps/i386/asm-syntax.h: Define `L' macro to emit correct syntax for local label. * sysdeps/i386/add_n.S: Use correct local label syntax for the binary format. * sysdeps/i386/addmul_1.S: Likewise. * sysdeps/i386/lshift.S: Likewise. * sysdeps/i386/memchr.S: Likewise. * sysdeps/i386/memset.S: Likewise. * sysdeps/i386/mul_1.S: Likewise. * sysdeps/i386/rshift.S: Likewise. * sysdeps/i386/stpcpy.S: Likewise. * sysdeps/i386/stpncpy.S: Likewise. * sysdeps/i386/strchr.S: Likewise. * sysdeps/i386/strcspn.S: Likewise. * sysdeps/i386/strlen.S: Likewise. * sysdeps/i386/strpbrk.S: Likewise. * sysdeps/i386/strrchr.S: Likewise. * sysdeps/i386/strspn.S: Likewise. * sysdeps/i386/strtok.S: Likewise. * sysdeps/i386/sub_n.S: Likewise. * sysdeps/i386/submul_1.S: Likewise. * sysdeps/i386/i486/strcat.S: Likewise. * sysdeps/i386/i486/strlen.S: Likewise. * sysdeps/i386/i586/add_n.S: Likewise. * sysdeps/i386/i586/addmul_1.S: Likewise. * sysdeps/i386/i586/lshift.S: Likewise. * sysdeps/i386/i586/memset.S: Likewise. * sysdeps/i386/i586/mul_1.S: Likewise. * sysdeps/i386/i586/rshift.S: Likewise. * sysdeps/i386/i586/strchr.S: Likewise. * sysdeps/i386/i586/strlen.S: Likewise. * sysdeps/i386/i586/sub_n.S: Likewise. * sysdeps/i386/i586/submul_1.S: Likewise. * sysdeps/stub/s_log2l.c: Correct function name. * time/africa: Updated from ADO tzdata1997e. * time/aantarctica: Likewise. * time/asia: Likewise. * time/australia: Likewise. * time/europe: Likewise. * time/northamerica: Likewise. * time/southamerica: Likewise. * time/private.h: Updated from ADO tzcode1997d. * time/scheck.c: Likewise. 1997-03-31 12:42 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/powerpc/Dist: Add kernel_*.h files. 1997-03-23 01:41 Geoff Keating <geoffk@ozemail.com.au> * sysdeps/powerpc/strlen.s: Rewrote for more speed. * string/tst-strlen.c: Also test various string alignments. 1997-03-19 06:11 Geoff Keating <geoffk@ozemail.com.au> * sysdeps/unix/sysv/linux/powerpc/statbuf.h: Removed. * sysdeps/unix/sysv/linux/powerpc/kernel_stat.h: Added. * sysdeps/powerpc/dl-machine.h (ELF_PREFERRED_ADDRESS): Assume program base address is 0x01800000 if we can't otherwise tell what it is. (elf_machine_rela): Replace `assertion failed' with real error messages. * sysdeps/powerpc/dl-machine.h: More comments, more GNU indenting. Put in extra parentheses to make explicit the relative precedence of + and >>. * sysdeps/powerpc/bsd-setjmp.S: Add `__setjmp' symbol so the tests pass. * sysdeps/powerpc/clone.S: Rewrite. Probably still doesn't work. * sysdeps/unix/sysv/linux/powerpc/sys/sysdep.h: Use .section "text" instead of .text. 1997-03-31 02:28 Ulrich Drepper <drepper@cygnus.com> * misc/tst-tsearch.c: Don't write to stderr, write to stdout instead. * inet/inet_ntoa.c (inet_ntoa): Complete rewrite. Now uses thread-specific memory in multi-threaded programs. * sysdeps/stub/s_exp2.c: New file. Stub version for exp2 function. * sysdeps/stub/s_exp2f.c: New file. * sysdeps/stub/s_exp2l.c: New file. Reported by a sun <asun@zoology.washington.edu>. * sysdeps/unix/sysv/linux/netatalk/atalk.h: Rename to... * sysdeps/unix/sysv/linux/netatalk/at.h: ...this. Suggested by a sun <asun@zoology.washington.edu>. 1997-03-30 14:53 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/netinet/ip_icmp.h: Add former contents of <netinet/icmp.h>. Patch by a sun <asun@zoology.washington.edu>. * sysdeps/powerpc/strlen.S: Added.
145 lines
4.7 KiB
ArmAsm
145 lines
4.7 KiB
ArmAsm
/* copy no more then N bytes from SRC to DEST, returning the address of
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the terminating '\0' in DEST.
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For Intel 80x86, x>=3.
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Copyright (C) 1994, 1995, 1996, 1997 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@gnu.ai.mit.edu>
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Some bug fixes by Alan Modra <Alan@SPRI.Levels.UniSA.Edu.Au>
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- original wrote n+1 chars in some cases.
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- stpncpy() ought to behave like strncpy() ie. not null-terminate
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if limited by n. glibc-1.09 stpncpy() does this.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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/*
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INPUT PARAMETERS:
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dest (sp + 4)
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src (sp + 8)
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maxlen (sp + 12)
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*/
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.text
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ENTRY (__stpncpy)
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pushl %esi
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movl 8(%esp), %eax /* load destination pointer */
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movl 12(%esp), %esi /* load source pointer */
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movl 16(%esp), %ecx /* load maximal length */
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subl %eax, %esi /* magic: reduce number of loop variants
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to one using addressing mode */
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jmp L(1) /* jump to loop "head" */
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ALIGN(4)
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/* Four times unfolded loop with two loop counters. We get the
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the third value (the source address) by using the index+base
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addressing mode. */
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L(2): movb (%eax,%esi), %dl /* load current char */
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movb %dl, (%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(7) /* yes, then exit */
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movb 1(%eax,%esi), %dl /* load current char */
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movb %dl, 1(%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(6) /* yes, then exit */
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movb 2(%eax,%esi), %dl /* load current char */
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movb %dl, 2(%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(5) /* yes, then exit */
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movb 3(%eax,%esi), %dl /* load current char */
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movb %dl, 3(%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(4) /* yes, then exit */
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addl $4, %eax /* increment loop counter for full round */
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L(1): subl $4, %ecx /* still more than 4 bytes allowed? */
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jae L(2) /* yes, then go to start of loop */
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/* The maximal remaining 15 bytes are not processed in a loop. */
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addl $4, %ecx /* correct above subtraction */
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jz L(9) /* maximal allowed char reached => go to end */
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movb (%eax,%esi), %dl /* load current char */
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movb %dl, (%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(3) /* yes, then exit */
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incl %eax /* increment pointer */
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decl %ecx /* decrement length counter */
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jz L(9) /* no more allowed => exit */
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movb (%eax,%esi), %dl /* load current char */
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movb %dl, (%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(3) /* yes, then exit */
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incl %eax /* increment pointer */
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decl %ecx /* decrement length counter */
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jz L(9) /* no more allowed => exit */
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movb (%eax,%esi), %dl /* load current char */
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movb %dl, (%eax) /* and store it */
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testb %dl, %dl /* was it NUL? */
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jz L(3) /* yes, then exit */
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incl %eax /* increment pointer */
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jmp L(9) /* we don't have to test for counter underflow
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because we know we had a most 3 bytes
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remaining => exit */
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/* When coming from the main loop we have to adjust the pointer. */
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L(4): decl %ecx /* decrement counter */
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incl %eax /* increment pointer */
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L(5): decl %ecx /* increment pointer */
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incl %eax /* increment pointer */
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L(6): decl %ecx /* increment pointer */
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incl %eax /* increment pointer */
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L(7):
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addl $3, %ecx /* correct pre-decrementation of counter
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at the beginning of the loop; but why 3
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and not 4? Very simple, we have to count
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the NUL char we already wrote. */
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jz L(9) /* counter is also 0 => exit */
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/* We now have to fill the rest of the buffer with NUL. This
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is done in a tricky way. Please note that the addressing mode
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used below is not the same we used above. Here we use the
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%ecx register. */
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L(8):
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movb $0, (%ecx,%eax) /* store NUL char */
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L(3): decl %ecx /* all bytes written? */
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jnz L(8) /* no, then again */
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L(9): popl %esi /* restore saved register content */
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ret
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END (__stpncpy)
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weak_alias (__stpncpy, stpncpy)
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