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558 lines
9.0 KiB
ArmAsm
558 lines
9.0 KiB
ArmAsm
/* strrchr with SSE2 without bsf and bsr
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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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#if defined SHARED && !defined NOT_IN_libc
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# include <sysdep.h>
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# include "asm-syntax.h"
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.text
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ENTRY (__strrchr_sse2_no_bsf)
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movd %rsi, %xmm1
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pxor %xmm2, %xmm2
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mov %rdi, %rcx
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punpcklbw %xmm1, %xmm1
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punpcklbw %xmm1, %xmm1
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/* ECX has OFFSET. */
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and $63, %rcx
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cmp $48, %rcx
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pshufd $0, %xmm1, %xmm1
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ja L(crosscache)
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/* unaligned string. */
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movdqu (%rdi), %xmm0
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pcmpeqb %xmm0, %xmm2
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pcmpeqb %xmm1, %xmm0
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/* Find where NULL is. */
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pmovmskb %xmm2, %rcx
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/* Check if there is a match. */
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pmovmskb %xmm0, %rax
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add $16, %rdi
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test %rax, %rax
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jnz L(unaligned_match1)
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test %rcx, %rcx
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jnz L(return_null)
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and $-16, %rdi
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xor %r8, %r8
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jmp L(loop)
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.p2align 4
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L(unaligned_match1):
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test %rcx, %rcx
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jnz L(prolog_find_zero_1)
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mov %rax, %r8
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mov %rdi, %rsi
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and $-16, %rdi
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jmp L(loop)
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.p2align 4
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L(crosscache):
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/* Hancle unaligned string. */
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and $15, %rcx
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and $-16, %rdi
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pxor %xmm3, %xmm3
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movdqa (%rdi), %xmm0
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pcmpeqb %xmm0, %xmm3
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pcmpeqb %xmm1, %xmm0
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/* Find where NULL is. */
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pmovmskb %xmm3, %rdx
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/* Check if there is a match. */
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pmovmskb %xmm0, %rax
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/* Remove the leading bytes. */
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shr %cl, %rdx
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shr %cl, %rax
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add $16, %rdi
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test %rax, %rax
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jnz L(unaligned_match)
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test %rdx, %rdx
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jnz L(return_null)
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xor %r8, %r8
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jmp L(loop)
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.p2align 4
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L(unaligned_match):
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test %rdx, %rdx
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jnz L(prolog_find_zero)
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mov %rax, %r8
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lea (%rdi, %rcx), %rsi
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/* Loop start on aligned string. */
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.p2align 4
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L(loop):
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movdqa (%rdi), %xmm0
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pcmpeqb %xmm0, %xmm2
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add $16, %rdi
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm2, %rcx
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pmovmskb %xmm0, %rax
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or %rax, %rcx
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jnz L(matches)
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movdqa (%rdi), %xmm0
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pcmpeqb %xmm0, %xmm2
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add $16, %rdi
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm2, %rcx
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pmovmskb %xmm0, %rax
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or %rax, %rcx
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jnz L(matches)
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movdqa (%rdi), %xmm0
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pcmpeqb %xmm0, %xmm2
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add $16, %rdi
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm2, %rcx
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pmovmskb %xmm0, %rax
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or %rax, %rcx
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jnz L(matches)
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movdqa (%rdi), %xmm0
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pcmpeqb %xmm0, %xmm2
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add $16, %rdi
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pcmpeqb %xmm1, %xmm0
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pmovmskb %xmm2, %rcx
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pmovmskb %xmm0, %rax
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or %rax, %rcx
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jz L(loop)
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L(matches):
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test %rax, %rax
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jnz L(match)
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L(return_value):
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test %r8, %r8
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jz L(return_null)
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mov %r8, %rax
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mov %rsi, %rdi
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jmp L(match_exit)
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.p2align 4
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L(match):
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pmovmskb %xmm2, %rcx
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test %rcx, %rcx
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jnz L(find_zero)
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mov %rax, %r8
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mov %rdi, %rsi
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jmp L(loop)
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.p2align 4
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L(find_zero):
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test %cl, %cl
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jz L(find_zero_high)
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mov %cl, %dl
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and $15, %dl
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jz L(find_zero_8)
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test $0x01, %cl
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jnz L(FindZeroExit1)
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test $0x02, %cl
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jnz L(FindZeroExit2)
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test $0x04, %cl
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jnz L(FindZeroExit3)
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and $1 << 4 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(find_zero_8):
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test $0x10, %cl
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jnz L(FindZeroExit5)
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test $0x20, %cl
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jnz L(FindZeroExit6)
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test $0x40, %cl
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jnz L(FindZeroExit7)
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and $1 << 8 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(find_zero_high):
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mov %ch, %dh
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and $15, %dh
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jz L(find_zero_high_8)
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test $0x01, %ch
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jnz L(FindZeroExit9)
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test $0x02, %ch
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jnz L(FindZeroExit10)
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test $0x04, %ch
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jnz L(FindZeroExit11)
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and $1 << 12 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(find_zero_high_8):
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test $0x10, %ch
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jnz L(FindZeroExit13)
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test $0x20, %ch
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jnz L(FindZeroExit14)
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test $0x40, %ch
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jnz L(FindZeroExit15)
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and $1 << 16 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit1):
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and $1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit2):
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and $1 << 2 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit3):
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and $1 << 3 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit5):
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and $1 << 5 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit6):
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and $1 << 6 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit7):
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and $1 << 7 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit9):
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and $1 << 9 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit10):
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and $1 << 10 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit11):
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and $1 << 11 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit13):
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and $1 << 13 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit14):
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and $1 << 14 - 1, %rax
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jz L(return_value)
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jmp L(match_exit)
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.p2align 4
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L(FindZeroExit15):
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and $1 << 15 - 1, %rax
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jz L(return_value)
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.p2align 4
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L(match_exit):
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test %ah, %ah
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jnz L(match_exit_high)
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mov %al, %dl
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and $15 << 4, %dl
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jnz L(match_exit_8)
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test $0x08, %al
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jnz L(Exit4)
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test $0x04, %al
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jnz L(Exit3)
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test $0x02, %al
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jnz L(Exit2)
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lea -16(%rdi), %rax
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ret
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.p2align 4
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L(match_exit_8):
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test $0x80, %al
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jnz L(Exit8)
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test $0x40, %al
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jnz L(Exit7)
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test $0x20, %al
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jnz L(Exit6)
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lea -12(%rdi), %rax
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ret
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.p2align 4
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L(match_exit_high):
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mov %ah, %dh
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and $15 << 4, %dh
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jnz L(match_exit_high_8)
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test $0x08, %ah
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jnz L(Exit12)
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test $0x04, %ah
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jnz L(Exit11)
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test $0x02, %ah
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jnz L(Exit10)
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lea -8(%rdi), %rax
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ret
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.p2align 4
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L(match_exit_high_8):
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test $0x80, %ah
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jnz L(Exit16)
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test $0x40, %ah
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jnz L(Exit15)
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test $0x20, %ah
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jnz L(Exit14)
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lea -4(%rdi), %rax
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ret
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.p2align 4
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L(Exit2):
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lea -15(%rdi), %rax
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ret
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.p2align 4
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L(Exit3):
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lea -14(%rdi), %rax
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ret
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.p2align 4
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L(Exit4):
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lea -13(%rdi), %rax
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ret
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.p2align 4
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L(Exit6):
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lea -11(%rdi), %rax
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ret
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.p2align 4
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L(Exit7):
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lea -10(%rdi), %rax
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ret
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.p2align 4
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L(Exit8):
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lea -9(%rdi), %rax
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ret
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.p2align 4
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L(Exit10):
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lea -7(%rdi), %rax
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ret
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.p2align 4
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L(Exit11):
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lea -6(%rdi), %rax
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ret
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.p2align 4
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L(Exit12):
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lea -5(%rdi), %rax
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ret
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.p2align 4
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L(Exit14):
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lea -3(%rdi), %rax
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ret
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.p2align 4
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L(Exit15):
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lea -2(%rdi), %rax
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ret
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.p2align 4
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L(Exit16):
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lea -1(%rdi), %rax
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ret
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/* Return NULL. */
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.p2align 4
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L(return_null):
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xor %rax, %rax
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ret
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.p2align 4
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L(prolog_find_zero):
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add %rcx, %rdi
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mov %rdx, %rcx
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L(prolog_find_zero_1):
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test %cl, %cl
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jz L(prolog_find_zero_high)
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mov %cl, %dl
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and $15, %dl
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jz L(prolog_find_zero_8)
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test $0x01, %cl
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jnz L(PrologFindZeroExit1)
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test $0x02, %cl
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jnz L(PrologFindZeroExit2)
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test $0x04, %cl
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jnz L(PrologFindZeroExit3)
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and $1 << 4 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(prolog_find_zero_8):
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test $0x10, %cl
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jnz L(PrologFindZeroExit5)
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test $0x20, %cl
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jnz L(PrologFindZeroExit6)
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test $0x40, %cl
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jnz L(PrologFindZeroExit7)
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and $1 << 8 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(prolog_find_zero_high):
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mov %ch, %dh
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and $15, %dh
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jz L(prolog_find_zero_high_8)
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test $0x01, %ch
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jnz L(PrologFindZeroExit9)
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test $0x02, %ch
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jnz L(PrologFindZeroExit10)
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test $0x04, %ch
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jnz L(PrologFindZeroExit11)
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and $1 << 12 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(prolog_find_zero_high_8):
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test $0x10, %ch
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jnz L(PrologFindZeroExit13)
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test $0x20, %ch
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jnz L(PrologFindZeroExit14)
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test $0x40, %ch
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jnz L(PrologFindZeroExit15)
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and $1 << 16 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit1):
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and $1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit2):
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and $1 << 2 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit3):
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and $1 << 3 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit5):
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and $1 << 5 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit6):
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and $1 << 6 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit7):
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and $1 << 7 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit9):
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and $1 << 9 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit10):
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and $1 << 10 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit11):
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and $1 << 11 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit13):
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and $1 << 13 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit14):
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and $1 << 14 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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.p2align 4
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L(PrologFindZeroExit15):
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and $1 << 15 - 1, %rax
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jnz L(match_exit)
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xor %rax, %rax
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ret
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END (__strrchr_sse2_no_bsf)
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#endif
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