mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-22 21:10:07 +00:00
234 lines
4.5 KiB
ArmAsm
234 lines
4.5 KiB
ArmAsm
/* strrchr (str, ch) -- Return pointer to last occurrence of CH in STR.
|
|
Copyright (C) 2013 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
#include <sysdep.h>
|
|
|
|
# ifndef ALIGN
|
|
# define ALIGN(n) .p2align n
|
|
# endif
|
|
|
|
|
|
.text
|
|
ENTRY (strrchr)
|
|
movd %esi, %xmm1
|
|
movq %rdi, %rax
|
|
andl $4095, %eax
|
|
punpcklbw %xmm1, %xmm1
|
|
cmpq $4032, %rax
|
|
punpcklwd %xmm1, %xmm1
|
|
pshufd $0, %xmm1, %xmm1
|
|
ja L(cross_page)
|
|
movdqu (%rdi), %xmm0
|
|
pxor %xmm2, %xmm2
|
|
movdqa %xmm0, %xmm3
|
|
pcmpeqb %xmm1, %xmm0
|
|
pcmpeqb %xmm2, %xmm3
|
|
pmovmskb %xmm0, %ecx
|
|
pmovmskb %xmm3, %edx
|
|
testq %rdx, %rdx
|
|
je L(next_48_bytes)
|
|
leaq -1(%rdx), %rax
|
|
xorq %rdx, %rax
|
|
andq %rcx, %rax
|
|
je L(exit)
|
|
bsrq %rax, %rax
|
|
addq %rdi, %rax
|
|
ret
|
|
|
|
ALIGN(4)
|
|
L(next_48_bytes):
|
|
movdqu 16(%rdi), %xmm4
|
|
movdqa %xmm4, %xmm5
|
|
movdqu 32(%rdi), %xmm3
|
|
pcmpeqb %xmm1, %xmm4
|
|
pcmpeqb %xmm2, %xmm5
|
|
movdqu 48(%rdi), %xmm0
|
|
pmovmskb %xmm5, %edx
|
|
movdqa %xmm3, %xmm5
|
|
pcmpeqb %xmm1, %xmm3
|
|
pcmpeqb %xmm2, %xmm5
|
|
pcmpeqb %xmm0, %xmm2
|
|
salq $16, %rdx
|
|
pmovmskb %xmm3, %r8d
|
|
pmovmskb %xmm5, %eax
|
|
pmovmskb %xmm2, %esi
|
|
salq $32, %r8
|
|
salq $32, %rax
|
|
pcmpeqb %xmm1, %xmm0
|
|
orq %rdx, %rax
|
|
movq %rsi, %rdx
|
|
pmovmskb %xmm4, %esi
|
|
salq $48, %rdx
|
|
salq $16, %rsi
|
|
orq %r8, %rsi
|
|
orq %rcx, %rsi
|
|
pmovmskb %xmm0, %ecx
|
|
salq $48, %rcx
|
|
orq %rcx, %rsi
|
|
orq %rdx, %rax
|
|
je L(loop_header2)
|
|
leaq -1(%rax), %rcx
|
|
xorq %rax, %rcx
|
|
andq %rcx, %rsi
|
|
je L(exit)
|
|
bsrq %rsi, %rsi
|
|
leaq (%rdi,%rsi), %rax
|
|
ret
|
|
|
|
ALIGN(4)
|
|
L(loop_header2):
|
|
testq %rsi, %rsi
|
|
movq %rdi, %rcx
|
|
je L(no_c_found)
|
|
L(loop_header):
|
|
addq $64, %rdi
|
|
pxor %xmm7, %xmm7
|
|
andq $-64, %rdi
|
|
jmp L(loop_entry)
|
|
|
|
ALIGN(4)
|
|
L(loop64):
|
|
testq %rdx, %rdx
|
|
cmovne %rdx, %rsi
|
|
cmovne %rdi, %rcx
|
|
addq $64, %rdi
|
|
L(loop_entry):
|
|
movdqa 32(%rdi), %xmm3
|
|
pxor %xmm6, %xmm6
|
|
movdqa 48(%rdi), %xmm2
|
|
movdqa %xmm3, %xmm0
|
|
movdqa 16(%rdi), %xmm4
|
|
pminub %xmm2, %xmm0
|
|
movdqa (%rdi), %xmm5
|
|
pminub %xmm4, %xmm0
|
|
pminub %xmm5, %xmm0
|
|
pcmpeqb %xmm7, %xmm0
|
|
pmovmskb %xmm0, %eax
|
|
movdqa %xmm5, %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm0, %r9d
|
|
movdqa %xmm4, %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm0, %edx
|
|
movdqa %xmm3, %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
salq $16, %rdx
|
|
pmovmskb %xmm0, %r10d
|
|
movdqa %xmm2, %xmm0
|
|
pcmpeqb %xmm1, %xmm0
|
|
salq $32, %r10
|
|
orq %r10, %rdx
|
|
pmovmskb %xmm0, %r8d
|
|
orq %r9, %rdx
|
|
salq $48, %r8
|
|
orq %r8, %rdx
|
|
testl %eax, %eax
|
|
je L(loop64)
|
|
pcmpeqb %xmm6, %xmm4
|
|
pcmpeqb %xmm6, %xmm3
|
|
pcmpeqb %xmm6, %xmm5
|
|
pmovmskb %xmm4, %eax
|
|
pmovmskb %xmm3, %r10d
|
|
pcmpeqb %xmm6, %xmm2
|
|
pmovmskb %xmm5, %r9d
|
|
salq $32, %r10
|
|
salq $16, %rax
|
|
pmovmskb %xmm2, %r8d
|
|
orq %r10, %rax
|
|
orq %r9, %rax
|
|
salq $48, %r8
|
|
orq %r8, %rax
|
|
leaq -1(%rax), %r8
|
|
xorq %rax, %r8
|
|
andq %r8, %rdx
|
|
cmovne %rdi, %rcx
|
|
cmovne %rdx, %rsi
|
|
bsrq %rsi, %rsi
|
|
leaq (%rcx,%rsi), %rax
|
|
ret
|
|
|
|
ALIGN(4)
|
|
L(no_c_found):
|
|
movl $1, %esi
|
|
xorl %ecx, %ecx
|
|
jmp L(loop_header)
|
|
|
|
ALIGN(4)
|
|
L(exit):
|
|
xorl %eax, %eax
|
|
ret
|
|
|
|
ALIGN(4)
|
|
L(cross_page):
|
|
movq %rdi, %rax
|
|
pxor %xmm0, %xmm0
|
|
andq $-64, %rax
|
|
movdqu (%rax), %xmm5
|
|
movdqa %xmm5, %xmm6
|
|
movdqu 16(%rax), %xmm4
|
|
pcmpeqb %xmm1, %xmm5
|
|
pcmpeqb %xmm0, %xmm6
|
|
movdqu 32(%rax), %xmm3
|
|
pmovmskb %xmm6, %esi
|
|
movdqa %xmm4, %xmm6
|
|
movdqu 48(%rax), %xmm2
|
|
pcmpeqb %xmm1, %xmm4
|
|
pcmpeqb %xmm0, %xmm6
|
|
pmovmskb %xmm6, %edx
|
|
movdqa %xmm3, %xmm6
|
|
pcmpeqb %xmm1, %xmm3
|
|
pcmpeqb %xmm0, %xmm6
|
|
pcmpeqb %xmm2, %xmm0
|
|
salq $16, %rdx
|
|
pmovmskb %xmm3, %r9d
|
|
pmovmskb %xmm6, %r8d
|
|
pmovmskb %xmm0, %ecx
|
|
salq $32, %r9
|
|
salq $32, %r8
|
|
pcmpeqb %xmm1, %xmm2
|
|
orq %r8, %rdx
|
|
salq $48, %rcx
|
|
pmovmskb %xmm5, %r8d
|
|
orq %rsi, %rdx
|
|
pmovmskb %xmm4, %esi
|
|
orq %rcx, %rdx
|
|
pmovmskb %xmm2, %ecx
|
|
salq $16, %rsi
|
|
salq $48, %rcx
|
|
orq %r9, %rsi
|
|
orq %r8, %rsi
|
|
orq %rcx, %rsi
|
|
movl %edi, %ecx
|
|
subl %eax, %ecx
|
|
shrq %cl, %rdx
|
|
shrq %cl, %rsi
|
|
testq %rdx, %rdx
|
|
je L(loop_header2)
|
|
leaq -1(%rdx), %rax
|
|
xorq %rdx, %rax
|
|
andq %rax, %rsi
|
|
je L(exit)
|
|
bsrq %rsi, %rax
|
|
addq %rdi, %rax
|
|
ret
|
|
END (strrchr)
|
|
|
|
weak_alias (strrchr, rindex)
|
|
libc_hidden_builtin_def (strrchr)
|