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https://sourceware.org/git/glibc.git
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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
867 lines
13 KiB
ArmAsm
867 lines
13 KiB
ArmAsm
/* strcat with SSSE3
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Copyright (C) 2011-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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, see
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<https://www.gnu.org/licenses/>. */
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#if IS_IN (libc)
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# include <sysdep.h>
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# ifndef STRCAT
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# define STRCAT __strcat_ssse3
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# endif
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# define USE_AS_STRCAT
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.text
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ENTRY (STRCAT)
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# ifdef USE_AS_STRNCAT
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mov %rdx, %r8
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# endif
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/* Inline corresponding strlen file, temporary until new strcpy
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implementation gets merged. */
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xor %eax, %eax
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cmpb $0, (%rdi)
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jz L(exit_tail0)
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cmpb $0, 1(%rdi)
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jz L(exit_tail1)
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cmpb $0, 2(%rdi)
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jz L(exit_tail2)
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cmpb $0, 3(%rdi)
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jz L(exit_tail3)
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cmpb $0, 4(%rdi)
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jz L(exit_tail4)
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cmpb $0, 5(%rdi)
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jz L(exit_tail5)
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cmpb $0, 6(%rdi)
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jz L(exit_tail6)
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cmpb $0, 7(%rdi)
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jz L(exit_tail7)
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cmpb $0, 8(%rdi)
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jz L(exit_tail8)
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cmpb $0, 9(%rdi)
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jz L(exit_tail9)
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cmpb $0, 10(%rdi)
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jz L(exit_tail10)
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cmpb $0, 11(%rdi)
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jz L(exit_tail11)
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cmpb $0, 12(%rdi)
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jz L(exit_tail12)
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cmpb $0, 13(%rdi)
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jz L(exit_tail13)
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cmpb $0, 14(%rdi)
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jz L(exit_tail14)
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cmpb $0, 15(%rdi)
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jz L(exit_tail15)
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pxor %xmm0, %xmm0
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lea 16(%rdi), %rcx
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lea 16(%rdi), %rax
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and $-16, %rax
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pcmpeqb (%rax), %xmm0
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pmovmskb %xmm0, %edx
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pxor %xmm1, %xmm1
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm1
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pmovmskb %xmm1, %edx
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pxor %xmm2, %xmm2
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm2
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pmovmskb %xmm2, %edx
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pxor %xmm3, %xmm3
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm0
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pmovmskb %xmm0, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm1
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pmovmskb %xmm1, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm2
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pmovmskb %xmm2, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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pcmpeqb (%rax), %xmm3
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pmovmskb %xmm3, %edx
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test %edx, %edx
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lea 16(%rax), %rax
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jnz L(exit)
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and $-0x40, %rax
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.p2align 4
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L(aligned_64):
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pcmpeqb (%rax), %xmm0
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pcmpeqb 16(%rax), %xmm1
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pcmpeqb 32(%rax), %xmm2
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pcmpeqb 48(%rax), %xmm3
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pmovmskb %xmm0, %edx
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pmovmskb %xmm1, %r11d
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pmovmskb %xmm2, %r10d
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pmovmskb %xmm3, %r9d
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or %edx, %r9d
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or %r11d, %r9d
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or %r10d, %r9d
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lea 64(%rax), %rax
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jz L(aligned_64)
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test %edx, %edx
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jnz L(aligned_64_exit_16)
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test %r11d, %r11d
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jnz L(aligned_64_exit_32)
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test %r10d, %r10d
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jnz L(aligned_64_exit_48)
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L(aligned_64_exit_64):
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pmovmskb %xmm3, %edx
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jmp L(exit)
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L(aligned_64_exit_48):
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lea -16(%rax), %rax
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mov %r10d, %edx
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jmp L(exit)
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L(aligned_64_exit_32):
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lea -32(%rax), %rax
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mov %r11d, %edx
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jmp L(exit)
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L(aligned_64_exit_16):
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lea -48(%rax), %rax
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L(exit):
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sub %rcx, %rax
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test %dl, %dl
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jz L(exit_high)
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test $0x01, %dl
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jnz L(exit_tail0)
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test $0x02, %dl
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jnz L(exit_tail1)
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test $0x04, %dl
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jnz L(exit_tail2)
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test $0x08, %dl
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jnz L(exit_tail3)
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test $0x10, %dl
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jnz L(exit_tail4)
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test $0x20, %dl
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jnz L(exit_tail5)
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test $0x40, %dl
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jnz L(exit_tail6)
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add $7, %eax
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L(exit_tail0):
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_high):
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add $8, %eax
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test $0x01, %dh
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jnz L(exit_tail0)
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test $0x02, %dh
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jnz L(exit_tail1)
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test $0x04, %dh
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jnz L(exit_tail2)
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test $0x08, %dh
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jnz L(exit_tail3)
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test $0x10, %dh
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jnz L(exit_tail4)
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test $0x20, %dh
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jnz L(exit_tail5)
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test $0x40, %dh
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jnz L(exit_tail6)
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add $7, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail1):
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add $1, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail2):
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add $2, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail3):
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add $3, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail4):
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add $4, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail5):
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add $5, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail6):
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add $6, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail7):
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add $7, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail8):
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add $8, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail9):
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add $9, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail10):
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add $10, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail11):
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add $11, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail12):
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add $12, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail13):
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add $13, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail14):
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add $14, %eax
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jmp L(StartStrcpyPart)
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.p2align 4
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L(exit_tail15):
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add $15, %eax
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.p2align 4
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L(StartStrcpyPart):
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mov %rsi, %rcx
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lea (%rdi, %rax), %rdx
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# ifdef USE_AS_STRNCAT
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test %r8, %r8
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jz L(StrncatExit0)
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cmp $8, %r8
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jbe L(StrncatExit8Bytes)
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# endif
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cmpb $0, (%rcx)
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jz L(Exit1)
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cmpb $0, 1(%rcx)
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jz L(Exit2)
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cmpb $0, 2(%rcx)
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jz L(Exit3)
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cmpb $0, 3(%rcx)
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jz L(Exit4)
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cmpb $0, 4(%rcx)
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jz L(Exit5)
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cmpb $0, 5(%rcx)
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jz L(Exit6)
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cmpb $0, 6(%rcx)
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jz L(Exit7)
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cmpb $0, 7(%rcx)
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jz L(Exit8)
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cmpb $0, 8(%rcx)
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jz L(Exit9)
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# ifdef USE_AS_STRNCAT
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cmp $16, %r8
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jb L(StrncatExit15Bytes)
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# endif
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cmpb $0, 9(%rcx)
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jz L(Exit10)
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cmpb $0, 10(%rcx)
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jz L(Exit11)
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cmpb $0, 11(%rcx)
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jz L(Exit12)
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cmpb $0, 12(%rcx)
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jz L(Exit13)
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cmpb $0, 13(%rcx)
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jz L(Exit14)
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cmpb $0, 14(%rcx)
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jz L(Exit15)
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cmpb $0, 15(%rcx)
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jz L(Exit16)
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# ifdef USE_AS_STRNCAT
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cmp $16, %r8
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je L(StrncatExit16)
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# define USE_AS_STRNCPY
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# endif
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# include "strcpy-ssse3.S"
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.p2align 4
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L(CopyFrom1To16Bytes):
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add %rsi, %rdx
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add %rsi, %rcx
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test %al, %al
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jz L(ExitHigh)
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test $0x01, %al
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jnz L(Exit1)
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test $0x02, %al
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jnz L(Exit2)
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test $0x04, %al
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jnz L(Exit3)
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test $0x08, %al
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jnz L(Exit4)
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test $0x10, %al
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jnz L(Exit5)
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test $0x20, %al
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|
jnz L(Exit6)
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test $0x40, %al
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|
jnz L(Exit7)
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movlpd (%rcx), %xmm0
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movlpd %xmm0, (%rdx)
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mov %rdi, %rax
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ret
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|
.p2align 4
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L(ExitHigh):
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test $0x01, %ah
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|
jnz L(Exit9)
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|
test $0x02, %ah
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|
jnz L(Exit10)
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|
test $0x04, %ah
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|
jnz L(Exit11)
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|
test $0x08, %ah
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|
jnz L(Exit12)
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|
test $0x10, %ah
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|
jnz L(Exit13)
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|
test $0x20, %ah
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|
jnz L(Exit14)
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|
test $0x40, %ah
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|
jnz L(Exit15)
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|
movlpd (%rcx), %xmm0
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movlpd 8(%rcx), %xmm1
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movlpd %xmm0, (%rdx)
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|
movlpd %xmm1, 8(%rdx)
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|
mov %rdi, %rax
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|
ret
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|
|
|
.p2align 4
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|
L(StrncatExit1):
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|
xor %ah, %ah
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|
movb %ah, 1(%rdx)
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|
L(Exit1):
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|
movb (%rcx), %al
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|
movb %al, (%rdx)
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|
mov %rdi, %rax
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|
ret
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|
|
|
.p2align 4
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|
L(StrncatExit2):
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|
xor %ah, %ah
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|
movb %ah, 2(%rdx)
|
|
L(Exit2):
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|
movw (%rcx), %ax
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|
movw %ax, (%rdx)
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|
mov %rdi, %rax
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|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit3):
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|
xor %ah, %ah
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|
movb %ah, 3(%rdx)
|
|
L(Exit3):
|
|
movw (%rcx), %ax
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|
movw %ax, (%rdx)
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|
movb 2(%rcx), %al
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|
movb %al, 2(%rdx)
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|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit4):
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|
xor %ah, %ah
|
|
movb %ah, 4(%rdx)
|
|
L(Exit4):
|
|
mov (%rcx), %eax
|
|
mov %eax, (%rdx)
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|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit5):
|
|
xor %ah, %ah
|
|
movb %ah, 5(%rdx)
|
|
L(Exit5):
|
|
mov (%rcx), %eax
|
|
mov %eax, (%rdx)
|
|
movb 4(%rcx), %al
|
|
movb %al, 4(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit6):
|
|
xor %ah, %ah
|
|
movb %ah, 6(%rdx)
|
|
L(Exit6):
|
|
mov (%rcx), %eax
|
|
mov %eax, (%rdx)
|
|
movw 4(%rcx), %ax
|
|
movw %ax, 4(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit7):
|
|
xor %ah, %ah
|
|
movb %ah, 7(%rdx)
|
|
L(Exit7):
|
|
mov (%rcx), %eax
|
|
mov %eax, (%rdx)
|
|
mov 3(%rcx), %eax
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|
mov %eax, 3(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit8):
|
|
xor %ah, %ah
|
|
movb %ah, 8(%rdx)
|
|
L(Exit8):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit9):
|
|
xor %ah, %ah
|
|
movb %ah, 9(%rdx)
|
|
L(Exit9):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movb 8(%rcx), %al
|
|
movb %al, 8(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit10):
|
|
xor %ah, %ah
|
|
movb %ah, 10(%rdx)
|
|
L(Exit10):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movw 8(%rcx), %ax
|
|
movw %ax, 8(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit11):
|
|
xor %ah, %ah
|
|
movb %ah, 11(%rdx)
|
|
L(Exit11):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
mov 7(%rcx), %eax
|
|
mov %eax, 7(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit12):
|
|
xor %ah, %ah
|
|
movb %ah, 12(%rdx)
|
|
L(Exit12):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
mov 8(%rcx), %eax
|
|
mov %eax, 8(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit13):
|
|
xor %ah, %ah
|
|
movb %ah, 13(%rdx)
|
|
L(Exit13):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd 5(%rcx), %xmm1
|
|
movlpd %xmm1, 5(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit14):
|
|
xor %ah, %ah
|
|
movb %ah, 14(%rdx)
|
|
L(Exit14):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd 6(%rcx), %xmm1
|
|
movlpd %xmm1, 6(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit15):
|
|
xor %ah, %ah
|
|
movb %ah, 15(%rdx)
|
|
L(Exit15):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd 7(%rcx), %xmm1
|
|
movlpd %xmm1, 7(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit16):
|
|
xor %ah, %ah
|
|
movb %ah, 16(%rdx)
|
|
L(Exit16):
|
|
movlpd (%rcx), %xmm0
|
|
movlpd 8(%rcx), %xmm1
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd %xmm1, 8(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
# ifdef USE_AS_STRNCPY
|
|
|
|
.p2align 4
|
|
L(CopyFrom1To16BytesCase2):
|
|
add $16, %r8
|
|
add %rsi, %rcx
|
|
lea (%rsi, %rdx), %rsi
|
|
lea -9(%r8), %rdx
|
|
and $1<<7, %dh
|
|
or %al, %dh
|
|
test %dh, %dh
|
|
lea (%rsi), %rdx
|
|
jz L(ExitHighCase2)
|
|
|
|
test $0x01, %al
|
|
jnz L(Exit1)
|
|
cmp $1, %r8
|
|
je L(StrncatExit1)
|
|
test $0x02, %al
|
|
jnz L(Exit2)
|
|
cmp $2, %r8
|
|
je L(StrncatExit2)
|
|
test $0x04, %al
|
|
jnz L(Exit3)
|
|
cmp $3, %r8
|
|
je L(StrncatExit3)
|
|
test $0x08, %al
|
|
jnz L(Exit4)
|
|
cmp $4, %r8
|
|
je L(StrncatExit4)
|
|
test $0x10, %al
|
|
jnz L(Exit5)
|
|
cmp $5, %r8
|
|
je L(StrncatExit5)
|
|
test $0x20, %al
|
|
jnz L(Exit6)
|
|
cmp $6, %r8
|
|
je L(StrncatExit6)
|
|
test $0x40, %al
|
|
jnz L(Exit7)
|
|
cmp $7, %r8
|
|
je L(StrncatExit7)
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
lea 7(%rdx), %rax
|
|
cmpb $1, (%rax)
|
|
sbb $-1, %rax
|
|
xor %cl, %cl
|
|
movb %cl, (%rax)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(ExitHighCase2):
|
|
test $0x01, %ah
|
|
jnz L(Exit9)
|
|
cmp $9, %r8
|
|
je L(StrncatExit9)
|
|
test $0x02, %ah
|
|
jnz L(Exit10)
|
|
cmp $10, %r8
|
|
je L(StrncatExit10)
|
|
test $0x04, %ah
|
|
jnz L(Exit11)
|
|
cmp $11, %r8
|
|
je L(StrncatExit11)
|
|
test $0x8, %ah
|
|
jnz L(Exit12)
|
|
cmp $12, %r8
|
|
je L(StrncatExit12)
|
|
test $0x10, %ah
|
|
jnz L(Exit13)
|
|
cmp $13, %r8
|
|
je L(StrncatExit13)
|
|
test $0x20, %ah
|
|
jnz L(Exit14)
|
|
cmp $14, %r8
|
|
je L(StrncatExit14)
|
|
test $0x40, %ah
|
|
jnz L(Exit15)
|
|
cmp $15, %r8
|
|
je L(StrncatExit15)
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd 8(%rcx), %xmm1
|
|
movlpd %xmm1, 8(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
L(CopyFrom1To16BytesCase2OrCase3):
|
|
test %rax, %rax
|
|
jnz L(CopyFrom1To16BytesCase2)
|
|
|
|
.p2align 4
|
|
L(CopyFrom1To16BytesCase3):
|
|
add $16, %r8
|
|
add %rsi, %rdx
|
|
add %rsi, %rcx
|
|
|
|
cmp $8, %r8
|
|
ja L(ExitHighCase3)
|
|
cmp $1, %r8
|
|
je L(StrncatExit1)
|
|
cmp $2, %r8
|
|
je L(StrncatExit2)
|
|
cmp $3, %r8
|
|
je L(StrncatExit3)
|
|
cmp $4, %r8
|
|
je L(StrncatExit4)
|
|
cmp $5, %r8
|
|
je L(StrncatExit5)
|
|
cmp $6, %r8
|
|
je L(StrncatExit6)
|
|
cmp $7, %r8
|
|
je L(StrncatExit7)
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
xor %ah, %ah
|
|
movb %ah, 8(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(ExitHighCase3):
|
|
cmp $9, %r8
|
|
je L(StrncatExit9)
|
|
cmp $10, %r8
|
|
je L(StrncatExit10)
|
|
cmp $11, %r8
|
|
je L(StrncatExit11)
|
|
cmp $12, %r8
|
|
je L(StrncatExit12)
|
|
cmp $13, %r8
|
|
je L(StrncatExit13)
|
|
cmp $14, %r8
|
|
je L(StrncatExit14)
|
|
cmp $15, %r8
|
|
je L(StrncatExit15)
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd 8(%rcx), %xmm1
|
|
movlpd %xmm1, 8(%rdx)
|
|
xor %ah, %ah
|
|
movb %ah, 16(%rdx)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit0):
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit15Bytes):
|
|
cmp $9, %r8
|
|
je L(StrncatExit9)
|
|
cmpb $0, 9(%rcx)
|
|
jz L(Exit10)
|
|
cmp $10, %r8
|
|
je L(StrncatExit10)
|
|
cmpb $0, 10(%rcx)
|
|
jz L(Exit11)
|
|
cmp $11, %r8
|
|
je L(StrncatExit11)
|
|
cmpb $0, 11(%rcx)
|
|
jz L(Exit12)
|
|
cmp $12, %r8
|
|
je L(StrncatExit12)
|
|
cmpb $0, 12(%rcx)
|
|
jz L(Exit13)
|
|
cmp $13, %r8
|
|
je L(StrncatExit13)
|
|
cmpb $0, 13(%rcx)
|
|
jz L(Exit14)
|
|
cmp $14, %r8
|
|
je L(StrncatExit14)
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
movlpd 7(%rcx), %xmm1
|
|
movlpd %xmm1, 7(%rdx)
|
|
lea 14(%rdx), %rax
|
|
cmpb $1, (%rax)
|
|
sbb $-1, %rax
|
|
xor %cl, %cl
|
|
movb %cl, (%rax)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
.p2align 4
|
|
L(StrncatExit8Bytes):
|
|
cmpb $0, (%rcx)
|
|
jz L(Exit1)
|
|
cmp $1, %r8
|
|
je L(StrncatExit1)
|
|
cmpb $0, 1(%rcx)
|
|
jz L(Exit2)
|
|
cmp $2, %r8
|
|
je L(StrncatExit2)
|
|
cmpb $0, 2(%rcx)
|
|
jz L(Exit3)
|
|
cmp $3, %r8
|
|
je L(StrncatExit3)
|
|
cmpb $0, 3(%rcx)
|
|
jz L(Exit4)
|
|
cmp $4, %r8
|
|
je L(StrncatExit4)
|
|
cmpb $0, 4(%rcx)
|
|
jz L(Exit5)
|
|
cmp $5, %r8
|
|
je L(StrncatExit5)
|
|
cmpb $0, 5(%rcx)
|
|
jz L(Exit6)
|
|
cmp $6, %r8
|
|
je L(StrncatExit6)
|
|
cmpb $0, 6(%rcx)
|
|
jz L(Exit7)
|
|
cmp $7, %r8
|
|
je L(StrncatExit7)
|
|
movlpd (%rcx), %xmm0
|
|
movlpd %xmm0, (%rdx)
|
|
lea 7(%rdx), %rax
|
|
cmpb $1, (%rax)
|
|
sbb $-1, %rax
|
|
xor %cl, %cl
|
|
movb %cl, (%rax)
|
|
mov %rdi, %rax
|
|
ret
|
|
|
|
# endif
|
|
END (STRCAT)
|
|
#endif
|