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https://sourceware.org/git/glibc.git
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707 lines
11 KiB
ArmAsm
707 lines
11 KiB
ArmAsm
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/* Optimized memchr with sse2 without bsf
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Copyright (C) 2011 Free Software Foundation, Inc.
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Contributed by Intel Corporation.
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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, 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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#ifndef NOT_IN_libc
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# include <sysdep.h>
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# define CFI_PUSH(REG) \
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cfi_adjust_cfa_offset (4); \
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cfi_rel_offset (REG, 0)
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# define CFI_POP(REG) \
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cfi_adjust_cfa_offset (-4); \
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cfi_restore (REG)
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# define PUSH(REG) pushl REG; CFI_PUSH (REG)
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# define POP(REG) popl REG; CFI_POP (REG)
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# ifndef USE_AS_RAWMEMCHR
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# define ENTRANCE PUSH(%edi);
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# define PARMS 8
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# define RETURN POP(%edi); ret; CFI_PUSH(%edi);
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# else
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# define ENTRANCE
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# define PARMS 4
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# endif
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# define STR1 PARMS
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# define STR2 STR1+4
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# ifndef USE_AS_RAWMEMCHR
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# define LEN STR2+4
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# endif
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# ifndef MEMCHR
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# define MEMCHR __memchr_sse2
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# endif
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atom_text_section
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ENTRY (MEMCHR)
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ENTRANCE
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mov STR1(%esp), %ecx
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movd STR2(%esp), %xmm1
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# ifndef USE_AS_RAWMEMCHR
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mov LEN(%esp), %edx
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test %edx, %edx
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jz L(return_null)
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# endif
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punpcklbw %xmm1, %xmm1
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# ifndef USE_AS_RAWMEMCHR
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mov %ecx, %edi
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# else
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mov %ecx, %edx
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# endif
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punpcklbw %xmm1, %xmm1
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and $63, %ecx
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pshufd $0, %xmm1, %xmm1
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cmp $48, %ecx
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ja L(crosscache)
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# ifndef USE_AS_RAWMEMCHR
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movdqu (%edi), %xmm0
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# else
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movdqu (%edx), %xmm0
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# endif
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm0, %eax
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test %eax, %eax
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# ifndef USE_AS_RAWMEMCHR
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jnz L(match_case2_prolog)
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sub $16, %edx
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jbe L(return_null)
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lea 16(%edi), %edi
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and $15, %ecx
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and $-16, %edi
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add %ecx, %edx
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# else
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jnz L(match_case1_prolog)
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lea 16(%edx), %edx
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and $-16, %edx
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# endif
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jmp L(loop_prolog)
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.p2align 4
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L(crosscache):
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and $15, %ecx
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# ifndef USE_AS_RAWMEMCHR
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and $-16, %edi
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movdqa (%edi), %xmm0
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# else
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and $-16, %edx
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movdqa (%edx), %xmm0
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# endif
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm0, %eax
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sar %cl, %eax
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test %eax, %eax
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# ifndef USE_AS_RAWMEMCHR
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jnz L(match_case2_prolog1)
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lea -16(%edx), %edx
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add %ecx, %edx
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jle L(return_null)
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lea 16(%edi), %edi
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# else
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jnz L(match_case1_prolog1)
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lea 16(%edx), %edx
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# endif
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.p2align 4
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L(loop_prolog):
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# ifndef USE_AS_RAWMEMCHR
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sub $64, %edx
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jbe L(exit_loop)
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movdqa (%edi), %xmm0
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# else
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movdqa (%edx), %xmm0
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# endif
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pcmpeqb %xmm1, %xmm0
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xor %ecx, %ecx
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pmovmskb %xmm0, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 16(%edi), %xmm2
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# else
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movdqa 16(%edx), %xmm2
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# endif
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pcmpeqb %xmm1, %xmm2
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lea 16(%ecx), %ecx
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pmovmskb %xmm2, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 32(%edi), %xmm3
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# else
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movdqa 32(%edx), %xmm3
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# endif
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pcmpeqb %xmm1, %xmm3
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lea 16(%ecx), %ecx
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pmovmskb %xmm3, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 48(%edi), %xmm4
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# else
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movdqa 48(%edx), %xmm4
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# endif
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pcmpeqb %xmm1, %xmm4
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lea 16(%ecx), %ecx
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pmovmskb %xmm4, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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lea 64(%edi), %edi
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sub $64, %edx
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jbe L(exit_loop)
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movdqa (%edi), %xmm0
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# else
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lea 64(%edx), %edx
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movdqa (%edx), %xmm0
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# endif
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pcmpeqb %xmm1, %xmm0
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xor %ecx, %ecx
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pmovmskb %xmm0, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 16(%edi), %xmm2
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# else
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movdqa 16(%edx), %xmm2
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# endif
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pcmpeqb %xmm1, %xmm2
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lea 16(%ecx), %ecx
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pmovmskb %xmm2, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 32(%edi), %xmm3
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# else
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movdqa 32(%edx), %xmm3
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# endif
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pcmpeqb %xmm1, %xmm3
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lea 16(%ecx), %ecx
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pmovmskb %xmm3, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 48(%edi), %xmm4
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# else
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movdqa 48(%edx), %xmm4
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# endif
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pcmpeqb %xmm1, %xmm4
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lea 16(%ecx), %ecx
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pmovmskb %xmm4, %eax
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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lea 64(%edi), %edi
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mov %edi, %ecx
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and $-64, %edi
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and $63, %ecx
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add %ecx, %edx
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# else
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lea 64(%edx), %edx
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and $-64, %edx
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# endif
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.p2align 4
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L(align64_loop):
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# ifndef USE_AS_RAWMEMCHR
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sub $64, %edx
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jbe L(exit_loop)
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movdqa (%edi), %xmm0
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movdqa 16(%edi), %xmm2
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movdqa 32(%edi), %xmm3
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movdqa 48(%edi), %xmm4
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# else
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movdqa (%edx), %xmm0
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movdqa 16(%edx), %xmm2
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movdqa 32(%edx), %xmm3
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movdqa 48(%edx), %xmm4
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# endif
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pcmpeqb %xmm1, %xmm0
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pcmpeqb %xmm1, %xmm2
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pcmpeqb %xmm1, %xmm3
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pcmpeqb %xmm1, %xmm4
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pmaxub %xmm0, %xmm3
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pmaxub %xmm2, %xmm4
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pmaxub %xmm3, %xmm4
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# ifndef USE_AS_RAWMEMCHR
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add $64, %edi
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# else
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add $64, %edx
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# endif
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pmovmskb %xmm4, %eax
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test %eax, %eax
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jz L(align64_loop)
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# ifndef USE_AS_RAWMEMCHR
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sub $64, %edi
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# else
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sub $64, %edx
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# endif
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pmovmskb %xmm0, %eax
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xor %ecx, %ecx
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test %eax, %eax
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jnz L(match_case1)
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pmovmskb %xmm2, %eax
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lea 16(%ecx), %ecx
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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movdqa 32(%edi), %xmm3
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# else
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movdqa 32(%edx), %xmm3
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# endif
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pcmpeqb %xmm1, %xmm3
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pmovmskb %xmm3, %eax
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lea 16(%ecx), %ecx
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test %eax, %eax
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jnz L(match_case1)
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# ifndef USE_AS_RAWMEMCHR
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pcmpeqb 48(%edi), %xmm1
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# else
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pcmpeqb 48(%edx), %xmm1
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# endif
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pmovmskb %xmm1, %eax
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lea 16(%ecx), %ecx
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.p2align 4
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L(match_case1):
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# ifndef USE_AS_RAWMEMCHR
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add %ecx, %edi
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# else
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L(match_case1_prolog1):
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add %ecx, %edx
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L(match_case1_prolog):
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# endif
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test %al, %al
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jz L(match_case1_high)
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mov %al, %cl
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and $15, %cl
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jz L(match_case1_8)
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test $0x01, %al
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jnz L(ExitCase1_1)
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test $0x02, %al
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jnz L(ExitCase1_2)
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test $0x04, %al
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jnz L(ExitCase1_3)
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# ifndef USE_AS_RAWMEMCHR
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lea 3(%edi), %eax
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RETURN
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# else
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lea 3(%edx), %eax
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ret
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# endif
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.p2align 4
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L(match_case1_8):
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test $0x10, %al
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jnz L(ExitCase1_5)
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test $0x20, %al
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jnz L(ExitCase1_6)
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test $0x40, %al
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jnz L(ExitCase1_7)
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# ifndef USE_AS_RAWMEMCHR
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lea 7(%edi), %eax
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RETURN
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# else
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lea 7(%edx), %eax
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ret
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# endif
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.p2align 4
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L(match_case1_high):
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mov %ah, %ch
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and $15, %ch
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jz L(match_case1_high_8)
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test $0x01, %ah
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jnz L(ExitCase1_9)
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test $0x02, %ah
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jnz L(ExitCase1_10)
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test $0x04, %ah
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jnz L(ExitCase1_11)
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# ifndef USE_AS_RAWMEMCHR
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lea 11(%edi), %eax
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RETURN
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# else
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lea 11(%edx), %eax
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ret
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# endif
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.p2align 4
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L(match_case1_high_8):
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test $0x10, %ah
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jnz L(ExitCase1_13)
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test $0x20, %ah
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jnz L(ExitCase1_14)
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test $0x40, %ah
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jnz L(ExitCase1_15)
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# ifndef USE_AS_RAWMEMCHR
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lea 15(%edi), %eax
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RETURN
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# else
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lea 15(%edx), %eax
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ret
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# endif
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# ifndef USE_AS_RAWMEMCHR
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.p2align 4
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L(exit_loop):
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add $64, %edx
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||
|
|
movdqa (%edi), %xmm0
|
||
|
|
pcmpeqb %xmm1, %xmm0
|
||
|
|
xor %ecx, %ecx
|
||
|
|
pmovmskb %xmm0, %eax
|
||
|
|
test %eax, %eax
|
||
|
|
jnz L(match_case2)
|
||
|
|
cmp $16, %edx
|
||
|
|
jbe L(return_null)
|
||
|
|
|
||
|
|
movdqa 16(%edi), %xmm2
|
||
|
|
pcmpeqb %xmm1, %xmm2
|
||
|
|
lea 16(%ecx), %ecx
|
||
|
|
pmovmskb %xmm2, %eax
|
||
|
|
test %eax, %eax
|
||
|
|
jnz L(match_case2)
|
||
|
|
cmp $32, %edx
|
||
|
|
jbe L(return_null)
|
||
|
|
|
||
|
|
movdqa 32(%edi), %xmm3
|
||
|
|
pcmpeqb %xmm1, %xmm3
|
||
|
|
lea 16(%ecx), %ecx
|
||
|
|
pmovmskb %xmm3, %eax
|
||
|
|
test %eax, %eax
|
||
|
|
jnz L(match_case2)
|
||
|
|
cmp $48, %edx
|
||
|
|
jbe L(return_null)
|
||
|
|
|
||
|
|
pcmpeqb 48(%edi), %xmm1
|
||
|
|
lea 16(%ecx), %ecx
|
||
|
|
pmovmskb %xmm1, %eax
|
||
|
|
test %eax, %eax
|
||
|
|
jnz L(match_case2)
|
||
|
|
|
||
|
|
xor %eax, %eax
|
||
|
|
RETURN
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_1):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
mov %edi, %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
mov %edx, %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_2):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 1(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 1(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_3):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 2(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 2(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_5):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 4(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 4(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_6):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 5(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 5(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_7):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 6(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 6(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_9):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 8(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 8(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_10):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 9(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 9(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_11):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 10(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 10(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_13):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 12(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 12(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_14):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 13(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 13(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase1_15):
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
lea 14(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
lea 14(%edx), %eax
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
.p2align 4
|
||
|
|
L(match_case2):
|
||
|
|
sub %ecx, %edx
|
||
|
|
L(match_case2_prolog1):
|
||
|
|
add %ecx, %edi
|
||
|
|
L(match_case2_prolog):
|
||
|
|
test %al, %al
|
||
|
|
jz L(match_case2_high)
|
||
|
|
mov %al, %cl
|
||
|
|
and $15, %cl
|
||
|
|
jz L(match_case2_8)
|
||
|
|
test $0x01, %al
|
||
|
|
jnz L(ExitCase2_1)
|
||
|
|
test $0x02, %al
|
||
|
|
jnz L(ExitCase2_2)
|
||
|
|
test $0x04, %al
|
||
|
|
jnz L(ExitCase2_3)
|
||
|
|
sub $4, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 3(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(match_case2_8):
|
||
|
|
test $0x10, %al
|
||
|
|
jnz L(ExitCase2_5)
|
||
|
|
test $0x20, %al
|
||
|
|
jnz L(ExitCase2_6)
|
||
|
|
test $0x40, %al
|
||
|
|
jnz L(ExitCase2_7)
|
||
|
|
sub $8, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 7(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(match_case2_high):
|
||
|
|
mov %ah, %ch
|
||
|
|
and $15, %ch
|
||
|
|
jz L(match_case2_high_8)
|
||
|
|
test $0x01, %ah
|
||
|
|
jnz L(ExitCase2_9)
|
||
|
|
test $0x02, %ah
|
||
|
|
jnz L(ExitCase2_10)
|
||
|
|
test $0x04, %ah
|
||
|
|
jnz L(ExitCase2_11)
|
||
|
|
sub $12, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 11(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(match_case2_high_8):
|
||
|
|
test $0x10, %ah
|
||
|
|
jnz L(ExitCase2_13)
|
||
|
|
test $0x20, %ah
|
||
|
|
jnz L(ExitCase2_14)
|
||
|
|
test $0x40, %ah
|
||
|
|
jnz L(ExitCase2_15)
|
||
|
|
sub $16, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 15(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_1):
|
||
|
|
mov %edi, %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_2):
|
||
|
|
sub $2, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 1(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_3):
|
||
|
|
sub $3, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 2(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_5):
|
||
|
|
sub $5, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 4(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_6):
|
||
|
|
sub $6, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 5(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_7):
|
||
|
|
sub $7, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 6(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_9):
|
||
|
|
sub $9, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 8(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_10):
|
||
|
|
sub $10, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 9(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_11):
|
||
|
|
sub $11, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 10(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_13):
|
||
|
|
sub $13, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 12(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_14):
|
||
|
|
sub $14, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 13(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(ExitCase2_15):
|
||
|
|
sub $15, %edx
|
||
|
|
jb L(return_null)
|
||
|
|
lea 14(%edi), %eax
|
||
|
|
RETURN
|
||
|
|
# endif
|
||
|
|
|
||
|
|
.p2align 4
|
||
|
|
L(return_null):
|
||
|
|
xor %eax, %eax
|
||
|
|
# ifndef USE_AS_RAWMEMCHR
|
||
|
|
RETURN
|
||
|
|
# else
|
||
|
|
ret
|
||
|
|
# endif
|
||
|
|
|
||
|
|
END (MEMCHR)
|
||
|
|
#endif
|