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https://sourceware.org/git/glibc.git
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375 lines
6.9 KiB
ArmAsm
375 lines
6.9 KiB
ArmAsm
/* strstr with unaligned loads
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Copyright (C) 2009-2016 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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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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ENTRY(__strstr_sse2_unaligned)
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movzbl (%rsi), %eax
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testb %al, %al
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je L(empty)
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movzbl 1(%rsi), %edx
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testb %dl, %dl
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je L(strchr)
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movd %eax, %xmm1
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movd %edx, %xmm2
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movq %rdi, %rax
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andl $4095, %eax
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punpcklbw %xmm1, %xmm1
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cmpq $4031, %rax
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punpcklbw %xmm2, %xmm2
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punpcklwd %xmm1, %xmm1
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punpcklwd %xmm2, %xmm2
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pshufd $0, %xmm1, %xmm1
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pshufd $0, %xmm2, %xmm2
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ja L(cross_page)
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movdqu (%rdi), %xmm3
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pxor %xmm5, %xmm5
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movdqu 1(%rdi), %xmm4
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movdqa %xmm3, %xmm6
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pcmpeqb %xmm1, %xmm3
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pcmpeqb %xmm2, %xmm4
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movdqu 16(%rdi), %xmm0
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pcmpeqb %xmm5, %xmm6
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pminub %xmm4, %xmm3
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movdqa %xmm3, %xmm4
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movdqu 17(%rdi), %xmm3
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pcmpeqb %xmm0, %xmm5
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pcmpeqb %xmm2, %xmm3
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por %xmm6, %xmm4
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pcmpeqb %xmm1, %xmm0
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pminub %xmm3, %xmm0
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por %xmm5, %xmm0
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pmovmskb %xmm4, %r8d
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pmovmskb %xmm0, %eax
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salq $16, %rax
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orq %rax, %r8
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je L(next_32_bytes)
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L(next_pair_index):
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bsf %r8, %rax
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addq %rdi, %rax
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cmpb $0, (%rax)
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je L(zero1)
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movzbl 2(%rsi), %edx
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testb %dl, %dl
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je L(found1)
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cmpb 2(%rax), %dl
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jne L(next_pair)
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xorl %edx, %edx
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jmp L(pair_loop_start)
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.p2align 4
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L(strchr):
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movzbl %al, %esi
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jmp __strchr_sse2
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.p2align 4
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L(pair_loop):
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addq $1, %rdx
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cmpb 2(%rax,%rdx), %cl
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jne L(next_pair)
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L(pair_loop_start):
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movzbl 3(%rsi,%rdx), %ecx
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testb %cl, %cl
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jne L(pair_loop)
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L(found1):
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ret
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L(zero1):
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xorl %eax, %eax
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ret
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.p2align 4
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L(next_pair):
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leaq -1(%r8), %rax
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andq %rax, %r8
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jne L(next_pair_index)
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.p2align 4
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L(next_32_bytes):
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movdqu 32(%rdi), %xmm3
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pxor %xmm5, %xmm5
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movdqu 33(%rdi), %xmm4
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movdqa %xmm3, %xmm6
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pcmpeqb %xmm1, %xmm3
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pcmpeqb %xmm2, %xmm4
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movdqu 48(%rdi), %xmm0
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pcmpeqb %xmm5, %xmm6
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pminub %xmm4, %xmm3
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movdqa %xmm3, %xmm4
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movdqu 49(%rdi), %xmm3
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pcmpeqb %xmm0, %xmm5
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pcmpeqb %xmm2, %xmm3
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por %xmm6, %xmm4
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pcmpeqb %xmm1, %xmm0
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pminub %xmm3, %xmm0
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por %xmm5, %xmm0
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pmovmskb %xmm4, %eax
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salq $32, %rax
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pmovmskb %xmm0, %r8d
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salq $48, %r8
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orq %rax, %r8
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je L(loop_header)
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L(next_pair2_index):
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bsfq %r8, %rax
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addq %rdi, %rax
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cmpb $0, (%rax)
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je L(zero2)
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movzbl 2(%rsi), %edx
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testb %dl, %dl
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je L(found2)
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cmpb 2(%rax), %dl
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jne L(next_pair2)
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xorl %edx, %edx
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jmp L(pair_loop2_start)
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.p2align 4
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L(pair_loop2):
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addq $1, %rdx
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cmpb 2(%rax,%rdx), %cl
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jne L(next_pair2)
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L(pair_loop2_start):
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movzbl 3(%rsi,%rdx), %ecx
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testb %cl, %cl
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jne L(pair_loop2)
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L(found2):
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ret
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L(zero2):
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xorl %eax, %eax
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ret
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L(empty):
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mov %rdi, %rax
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ret
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.p2align 4
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L(next_pair2):
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leaq -1(%r8), %rax
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andq %rax, %r8
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jne L(next_pair2_index)
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L(loop_header):
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movq $-512, %r11
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movq %rdi, %r9
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pxor %xmm7, %xmm7
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andq $-64, %rdi
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.p2align 4
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L(loop):
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movdqa 64(%rdi), %xmm3
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movdqu 63(%rdi), %xmm6
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movdqa %xmm3, %xmm0
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pxor %xmm2, %xmm3
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pxor %xmm1, %xmm6
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movdqa 80(%rdi), %xmm10
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por %xmm3, %xmm6
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pminub %xmm10, %xmm0
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movdqu 79(%rdi), %xmm3
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pxor %xmm2, %xmm10
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pxor %xmm1, %xmm3
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movdqa 96(%rdi), %xmm9
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por %xmm10, %xmm3
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pminub %xmm9, %xmm0
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pxor %xmm2, %xmm9
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movdqa 112(%rdi), %xmm8
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addq $64, %rdi
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pminub %xmm6, %xmm3
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movdqu 31(%rdi), %xmm4
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pminub %xmm8, %xmm0
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pxor %xmm2, %xmm8
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pxor %xmm1, %xmm4
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por %xmm9, %xmm4
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pminub %xmm4, %xmm3
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movdqu 47(%rdi), %xmm5
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pxor %xmm1, %xmm5
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por %xmm8, %xmm5
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pminub %xmm5, %xmm3
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pminub %xmm3, %xmm0
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pcmpeqb %xmm7, %xmm0
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pmovmskb %xmm0, %eax
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testl %eax, %eax
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je L(loop)
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pminub (%rdi), %xmm6
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pminub 32(%rdi),%xmm4
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pminub 48(%rdi),%xmm5
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pcmpeqb %xmm7, %xmm6
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pcmpeqb %xmm7, %xmm5
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pmovmskb %xmm6, %edx
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movdqa 16(%rdi), %xmm8
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pcmpeqb %xmm7, %xmm4
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movdqu 15(%rdi), %xmm0
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pmovmskb %xmm5, %r8d
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movdqa %xmm8, %xmm3
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pmovmskb %xmm4, %ecx
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pcmpeqb %xmm1,%xmm0
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pcmpeqb %xmm2,%xmm3
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salq $32, %rcx
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pcmpeqb %xmm7,%xmm8
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salq $48, %r8
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pminub %xmm0,%xmm3
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orq %rcx, %rdx
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por %xmm3,%xmm8
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orq %rdx, %r8
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pmovmskb %xmm8, %eax
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salq $16, %rax
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orq %rax, %r8
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je L(loop)
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L(next_pair_index3):
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bsfq %r8, %rcx
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addq %rdi, %rcx
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cmpb $0, (%rcx)
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je L(zero)
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xorl %eax, %eax
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movzbl 2(%rsi), %edx
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testb %dl, %dl
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je L(success3)
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cmpb 1(%rcx), %dl
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jne L(next_pair3)
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jmp L(pair_loop_start3)
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.p2align 4
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L(pair_loop3):
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addq $1, %rax
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cmpb 1(%rcx,%rax), %dl
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jne L(next_pair3)
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L(pair_loop_start3):
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movzbl 3(%rsi,%rax), %edx
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testb %dl, %dl
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jne L(pair_loop3)
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L(success3):
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lea -1(%rcx), %rax
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ret
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.p2align 4
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L(next_pair3):
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addq %rax, %r11
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movq %rdi, %rax
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subq %r9, %rax
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cmpq %r11, %rax
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jl L(switch_strstr)
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leaq -1(%r8), %rax
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andq %rax, %r8
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jne L(next_pair_index3)
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jmp L(loop)
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.p2align 4
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L(switch_strstr):
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movq %rdi, %rdi
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jmp __strstr_sse2
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.p2align 4
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L(cross_page):
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movq %rdi, %rax
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pxor %xmm0, %xmm0
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andq $-64, %rax
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movdqa (%rax), %xmm3
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movdqu -1(%rax), %xmm4
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movdqa %xmm3, %xmm8
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movdqa 16(%rax), %xmm5
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pcmpeqb %xmm1, %xmm4
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pcmpeqb %xmm0, %xmm8
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pcmpeqb %xmm2, %xmm3
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movdqa %xmm5, %xmm7
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pminub %xmm4, %xmm3
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movdqu 15(%rax), %xmm4
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pcmpeqb %xmm0, %xmm7
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por %xmm3, %xmm8
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movdqa %xmm5, %xmm3
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movdqa 32(%rax), %xmm5
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pcmpeqb %xmm1, %xmm4
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pcmpeqb %xmm2, %xmm3
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movdqa %xmm5, %xmm6
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pmovmskb %xmm8, %ecx
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pminub %xmm4, %xmm3
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movdqu 31(%rax), %xmm4
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por %xmm3, %xmm7
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movdqa %xmm5, %xmm3
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pcmpeqb %xmm0, %xmm6
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movdqa 48(%rax), %xmm5
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pcmpeqb %xmm1, %xmm4
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pmovmskb %xmm7, %r8d
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pcmpeqb %xmm2, %xmm3
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pcmpeqb %xmm5, %xmm0
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pminub %xmm4, %xmm3
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movdqu 47(%rax), %xmm4
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por %xmm3, %xmm6
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movdqa %xmm5, %xmm3
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salq $16, %r8
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pcmpeqb %xmm1, %xmm4
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pcmpeqb %xmm2, %xmm3
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pmovmskb %xmm6, %r10d
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pminub %xmm4, %xmm3
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por %xmm3, %xmm0
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salq $32, %r10
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orq %r10, %r8
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orq %rcx, %r8
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movl %edi, %ecx
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pmovmskb %xmm0, %edx
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subl %eax, %ecx
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salq $48, %rdx
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orq %rdx, %r8
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shrq %cl, %r8
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je L(loop_header)
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L(next_pair_index4):
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bsfq %r8, %rax
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addq %rdi, %rax
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cmpb $0, (%rax)
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je L(zero)
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cmpq %rax,%rdi
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je L(next_pair4)
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movzbl 2(%rsi), %edx
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testb %dl, %dl
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je L(found3)
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cmpb 1(%rax), %dl
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jne L(next_pair4)
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xorl %edx, %edx
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jmp L(pair_loop_start4)
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.p2align 4
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L(pair_loop4):
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addq $1, %rdx
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cmpb 1(%rax,%rdx), %cl
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jne L(next_pair4)
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L(pair_loop_start4):
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movzbl 3(%rsi,%rdx), %ecx
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testb %cl, %cl
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jne L(pair_loop4)
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L(found3):
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subq $1, %rax
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ret
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.p2align 4
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L(next_pair4):
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leaq -1(%r8), %rax
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andq %rax, %r8
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jne L(next_pair_index4)
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jmp L(loop_header)
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.p2align 4
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L(found):
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rep
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ret
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.p2align 4
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L(zero):
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xorl %eax, %eax
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ret
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END(__strstr_sse2_unaligned)
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