2011-10-23 18:56:04 +00:00
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/* strlen SSE2 without bsf
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Copyright (C) 2010, 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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2012-02-09 23:18:22 +00:00
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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2011-10-23 18:56:04 +00:00
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/* only for strlen case we don't use optimized version for STATIC build just for SHARED */
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#if (defined SHARED || defined USE_AS_STRCAT || defined USE_AS_STRNLEN) && !defined NOT_IN_libc
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# ifndef USE_AS_STRCAT
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# include <sysdep.h>
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# define RETURN ret
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# ifndef STRLEN
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# define STRLEN __strlen_sse2_no_bsf
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# endif
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atom_text_section
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ENTRY (STRLEN)
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# endif
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xor %eax, %eax
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# ifdef USE_AS_STRNLEN
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2011-10-23 18:57:28 +00:00
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mov %rsi, %r8
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2011-10-23 18:56:04 +00:00
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sub $4, %rsi
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jbe L(len_less4_prolog)
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# endif
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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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# ifdef USE_AS_STRNLEN
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sub $4, %rsi
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jbe L(len_less8_prolog)
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# endif
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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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# ifdef USE_AS_STRNLEN
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sub $4, %rsi
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jbe L(len_less12_prolog)
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# endif
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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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# ifdef USE_AS_STRNLEN
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sub $4, %rsi
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jbe L(len_less16_prolog)
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# endif
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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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# ifdef USE_AS_STRNLEN
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and $15, %rdi
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add %rdi, %rsi
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sub $64, %rsi
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jbe L(len_less64)
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# endif
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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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# ifdef USE_AS_STRNLEN
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sub $64, %rsi
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jbe L(len_less64)
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# endif
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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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# ifdef USE_AS_STRNLEN
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sub $64, %rsi
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jbe L(len_less64)
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# endif
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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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# ifdef USE_AS_STRNLEN
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sub $64, %rsi
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jbe L(len_less64)
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# endif
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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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# ifdef USE_AS_STRNLEN
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mov %rax, %rdx
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and $63, %rdx
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add %rdx, %rsi
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# endif
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and $-0x40, %rax
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.p2align 4
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L(aligned_64):
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# ifdef USE_AS_STRNLEN
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sub $64, %rsi
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jbe L(len_less64)
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# endif
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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(aligned_64_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(aligned_64_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(aligned_64_exit)
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L(aligned_64_exit_16):
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lea -48(%rax), %rax
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L(aligned_64_exit):
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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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RETURN
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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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RETURN
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# ifdef USE_AS_STRNLEN
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.p2align 4
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L(len_less64):
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pxor %xmm0, %xmm0
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add $64, %rsi
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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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lea 16(%rax), %rax
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test %edx, %edx
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jnz L(strnlen_exit)
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sub $16, %rsi
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jbe L(return_start_len)
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pcmpeqb (%rax), %xmm1
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pmovmskb %xmm1, %edx
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lea 16(%rax), %rax
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test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
sub $16, %rsi
|
|
|
|
|
jbe L(return_start_len)
|
|
|
|
|
|
|
|
|
|
pcmpeqb (%rax), %xmm0
|
|
|
|
|
pmovmskb %xmm0, %edx
|
|
|
|
|
lea 16(%rax), %rax
|
|
|
|
|
test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
sub $16, %rsi
|
|
|
|
|
jbe L(return_start_len)
|
|
|
|
|
|
|
|
|
|
pcmpeqb (%rax), %xmm1
|
|
|
|
|
pmovmskb %xmm1, %edx
|
|
|
|
|
lea 16(%rax), %rax
|
|
|
|
|
test %edx, %edx
|
|
|
|
|
jnz L(strnlen_exit)
|
|
|
|
|
|
|
|
|
|
mov %r8, %rax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit):
|
|
|
|
|
sub %rcx, %rax
|
|
|
|
|
|
|
|
|
|
test %dl, %dl
|
|
|
|
|
jz L(strnlen_exit_high)
|
|
|
|
|
mov %dl, %cl
|
|
|
|
|
and $15, %cl
|
|
|
|
|
jz L(strnlen_exit_8)
|
|
|
|
|
test $0x01, %dl
|
|
|
|
|
jnz L(exit_tail0)
|
|
|
|
|
test $0x02, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail1)
|
|
|
|
|
test $0x04, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail2)
|
|
|
|
|
sub $4, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 3(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_8):
|
|
|
|
|
test $0x10, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail4)
|
|
|
|
|
test $0x20, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail5)
|
|
|
|
|
test $0x40, %dl
|
|
|
|
|
jnz L(strnlen_exit_tail6)
|
|
|
|
|
sub $8, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 7(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_high):
|
|
|
|
|
mov %dh, %ch
|
|
|
|
|
and $15, %ch
|
|
|
|
|
jz L(strnlen_exit_high_8)
|
|
|
|
|
test $0x01, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail8)
|
|
|
|
|
test $0x02, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail9)
|
|
|
|
|
test $0x04, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail10)
|
|
|
|
|
sub $12, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 11(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_high_8):
|
|
|
|
|
test $0x10, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail12)
|
|
|
|
|
test $0x20, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail13)
|
|
|
|
|
test $0x40, %dh
|
|
|
|
|
jnz L(strnlen_exit_tail14)
|
|
|
|
|
sub $16, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 15(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail1):
|
|
|
|
|
sub $2, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 1(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail2):
|
|
|
|
|
sub $3, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 2(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail4):
|
|
|
|
|
sub $5, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 4(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail5):
|
|
|
|
|
sub $6, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 5(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail6):
|
|
|
|
|
sub $7, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 6(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail8):
|
|
|
|
|
sub $9, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 8(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail9):
|
|
|
|
|
sub $10, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 9(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail10):
|
|
|
|
|
sub $11, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 10(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail12):
|
|
|
|
|
sub $13, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 12(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail13):
|
|
|
|
|
sub $14, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 13(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(strnlen_exit_tail14):
|
|
|
|
|
sub $15, %rsi
|
|
|
|
|
jb L(return_start_len)
|
|
|
|
|
lea 14(%eax), %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(return_start_len):
|
|
|
|
|
mov %r8, %rax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
/* for prolog only */
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less4_prolog):
|
|
|
|
|
add $4, %rsi
|
|
|
|
|
jz L(exit_tail0)
|
|
|
|
|
|
|
|
|
|
cmpb $0, (%rdi)
|
|
|
|
|
jz L(exit_tail0)
|
|
|
|
|
cmp $1, %esi
|
|
|
|
|
je L(exit_tail1)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 1(%rdi)
|
|
|
|
|
jz L(exit_tail1)
|
|
|
|
|
cmp $2, %esi
|
|
|
|
|
je L(exit_tail2)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 2(%rdi)
|
|
|
|
|
jz L(exit_tail2)
|
|
|
|
|
cmp $3, %esi
|
|
|
|
|
je L(exit_tail3)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 3(%rdi)
|
|
|
|
|
jz L(exit_tail3)
|
|
|
|
|
mov $4, %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less8_prolog):
|
|
|
|
|
add $4, %rsi
|
|
|
|
|
|
|
|
|
|
cmpb $0, 4(%rdi)
|
|
|
|
|
jz L(exit_tail4)
|
|
|
|
|
cmp $1, %esi
|
|
|
|
|
je L(exit_tail5)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 5(%rdi)
|
|
|
|
|
jz L(exit_tail5)
|
|
|
|
|
cmp $2, %esi
|
|
|
|
|
je L(exit_tail6)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 6(%rdi)
|
|
|
|
|
jz L(exit_tail6)
|
|
|
|
|
cmp $3, %esi
|
|
|
|
|
je L(exit_tail7)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 7(%rdi)
|
|
|
|
|
jz L(exit_tail7)
|
|
|
|
|
mov $8, %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less12_prolog):
|
|
|
|
|
add $4, %rsi
|
|
|
|
|
|
|
|
|
|
cmpb $0, 8(%rdi)
|
|
|
|
|
jz L(exit_tail8)
|
|
|
|
|
cmp $1, %esi
|
|
|
|
|
je L(exit_tail9)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 9(%rdi)
|
|
|
|
|
jz L(exit_tail9)
|
|
|
|
|
cmp $2, %esi
|
|
|
|
|
je L(exit_tail10)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 10(%rdi)
|
|
|
|
|
jz L(exit_tail10)
|
|
|
|
|
cmp $3, %esi
|
|
|
|
|
je L(exit_tail11)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 11(%rdi)
|
|
|
|
|
jz L(exit_tail11)
|
|
|
|
|
mov $12, %eax
|
|
|
|
|
ret
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(len_less16_prolog):
|
|
|
|
|
add $4, %rsi
|
|
|
|
|
|
|
|
|
|
cmpb $0, 12(%rdi)
|
|
|
|
|
jz L(exit_tail12)
|
|
|
|
|
cmp $1, %esi
|
|
|
|
|
je L(exit_tail13)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 13(%rdi)
|
|
|
|
|
jz L(exit_tail13)
|
|
|
|
|
cmp $2, %esi
|
|
|
|
|
je L(exit_tail14)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 14(%rdi)
|
|
|
|
|
jz L(exit_tail14)
|
|
|
|
|
cmp $3, %esi
|
|
|
|
|
je L(exit_tail15)
|
|
|
|
|
|
|
|
|
|
cmpb $0, 15(%rdi)
|
|
|
|
|
jz L(exit_tail15)
|
|
|
|
|
mov $16, %eax
|
|
|
|
|
ret
|
|
|
|
|
# endif
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail1):
|
|
|
|
|
add $1, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail2):
|
|
|
|
|
add $2, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail3):
|
|
|
|
|
add $3, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail4):
|
|
|
|
|
add $4, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail5):
|
|
|
|
|
add $5, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail6):
|
|
|
|
|
add $6, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail7):
|
|
|
|
|
add $7, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail8):
|
|
|
|
|
add $8, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail9):
|
|
|
|
|
add $9, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail10):
|
|
|
|
|
add $10, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail11):
|
|
|
|
|
add $11, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail12):
|
|
|
|
|
add $12, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail13):
|
|
|
|
|
add $13, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail14):
|
|
|
|
|
add $14, %eax
|
|
|
|
|
RETURN
|
|
|
|
|
|
|
|
|
|
.p2align 4
|
|
|
|
|
L(exit_tail15):
|
|
|
|
|
add $15, %eax
|
|
|
|
|
# ifndef USE_AS_STRCAT
|
|
|
|
|
RETURN
|
|
|
|
|
END (STRLEN)
|
|
|
|
|
# endif
|
|
|
|
|
#endif
|
