mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-30 00:31:08 +00:00
348 lines
5.6 KiB
ArmAsm
348 lines
5.6 KiB
ArmAsm
/* strchr SSE2 without bsf
|
|
Copyright (C) 2011-2023 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
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#if IS_IN (libc)
|
|
|
|
# include <sysdep.h>
|
|
|
|
# define CFI_PUSH(REG) \
|
|
cfi_adjust_cfa_offset (4); \
|
|
cfi_rel_offset (REG, 0)
|
|
|
|
# define CFI_POP(REG) \
|
|
cfi_adjust_cfa_offset (-4); \
|
|
cfi_restore (REG)
|
|
|
|
# define PUSH(REG) pushl REG; CFI_PUSH (REG)
|
|
# define POP(REG) popl REG; CFI_POP (REG)
|
|
|
|
# define PARMS 8
|
|
# define ENTRANCE PUSH(%edi)
|
|
# define RETURN POP(%edi); ret; CFI_PUSH(%edi);
|
|
|
|
# define STR1 PARMS
|
|
# define STR2 STR1+4
|
|
|
|
atom_text_section
|
|
ENTRY (__strchr_sse2)
|
|
|
|
ENTRANCE
|
|
mov STR1(%esp), %ecx
|
|
movd STR2(%esp), %xmm1
|
|
|
|
pxor %xmm2, %xmm2
|
|
mov %ecx, %edi
|
|
punpcklbw %xmm1, %xmm1
|
|
punpcklbw %xmm1, %xmm1
|
|
/* ECX has OFFSET. */
|
|
and $15, %ecx
|
|
pshufd $0, %xmm1, %xmm1
|
|
je L(loop)
|
|
|
|
/* Handle unaligned string. */
|
|
and $-16, %edi
|
|
movdqa (%edi), %xmm0
|
|
pcmpeqb %xmm0, %xmm2
|
|
pcmpeqb %xmm1, %xmm0
|
|
/* Find where NULL is. */
|
|
pmovmskb %xmm2, %edx
|
|
/* Check if there is a match. */
|
|
pmovmskb %xmm0, %eax
|
|
/* Remove the leading bytes. */
|
|
sarl %cl, %edx
|
|
sarl %cl, %eax
|
|
test %eax, %eax
|
|
jz L(unaligned_no_match)
|
|
/* Check which byte is a match. */
|
|
/* Is there a NULL? */
|
|
add %ecx, %edi
|
|
test %edx, %edx
|
|
jz L(match_case1)
|
|
jmp L(match_case2)
|
|
|
|
.p2align 4
|
|
L(unaligned_no_match):
|
|
test %edx, %edx
|
|
jne L(return_null)
|
|
|
|
pxor %xmm2, %xmm2
|
|
add $16, %edi
|
|
|
|
.p2align 4
|
|
/* Loop start on aligned string. */
|
|
L(loop):
|
|
movdqa (%edi), %xmm0
|
|
pcmpeqb %xmm0, %xmm2
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm2, %edx
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches)
|
|
test %edx, %edx
|
|
jnz L(return_null)
|
|
add $16, %edi
|
|
|
|
movdqa (%edi), %xmm0
|
|
pcmpeqb %xmm0, %xmm2
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm2, %edx
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches)
|
|
test %edx, %edx
|
|
jnz L(return_null)
|
|
add $16, %edi
|
|
|
|
movdqa (%edi), %xmm0
|
|
pcmpeqb %xmm0, %xmm2
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm2, %edx
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches)
|
|
test %edx, %edx
|
|
jnz L(return_null)
|
|
add $16, %edi
|
|
|
|
movdqa (%edi), %xmm0
|
|
pcmpeqb %xmm0, %xmm2
|
|
pcmpeqb %xmm1, %xmm0
|
|
pmovmskb %xmm2, %edx
|
|
pmovmskb %xmm0, %eax
|
|
test %eax, %eax
|
|
jnz L(matches)
|
|
test %edx, %edx
|
|
jnz L(return_null)
|
|
add $16, %edi
|
|
jmp L(loop)
|
|
|
|
L(matches):
|
|
/* There is a match. First find where NULL is. */
|
|
test %edx, %edx
|
|
jz L(match_case1)
|
|
|
|
.p2align 4
|
|
L(match_case2):
|
|
test %al, %al
|
|
jz L(match_higth_case2)
|
|
|
|
mov %al, %cl
|
|
and $15, %cl
|
|
jnz L(match_case2_4)
|
|
|
|
mov %dl, %ch
|
|
and $15, %ch
|
|
jnz L(return_null)
|
|
|
|
test $0x10, %al
|
|
jnz L(Exit5)
|
|
test $0x10, %dl
|
|
jnz L(return_null)
|
|
test $0x20, %al
|
|
jnz L(Exit6)
|
|
test $0x20, %dl
|
|
jnz L(return_null)
|
|
test $0x40, %al
|
|
jnz L(Exit7)
|
|
test $0x40, %dl
|
|
jnz L(return_null)
|
|
lea 7(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(match_case2_4):
|
|
test $0x01, %al
|
|
jnz L(Exit1)
|
|
test $0x01, %dl
|
|
jnz L(return_null)
|
|
test $0x02, %al
|
|
jnz L(Exit2)
|
|
test $0x02, %dl
|
|
jnz L(return_null)
|
|
test $0x04, %al
|
|
jnz L(Exit3)
|
|
test $0x04, %dl
|
|
jnz L(return_null)
|
|
lea 3(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(match_higth_case2):
|
|
test %dl, %dl
|
|
jnz L(return_null)
|
|
|
|
mov %ah, %cl
|
|
and $15, %cl
|
|
jnz L(match_case2_12)
|
|
|
|
mov %dh, %ch
|
|
and $15, %ch
|
|
jnz L(return_null)
|
|
|
|
test $0x10, %ah
|
|
jnz L(Exit13)
|
|
test $0x10, %dh
|
|
jnz L(return_null)
|
|
test $0x20, %ah
|
|
jnz L(Exit14)
|
|
test $0x20, %dh
|
|
jnz L(return_null)
|
|
test $0x40, %ah
|
|
jnz L(Exit15)
|
|
test $0x40, %dh
|
|
jnz L(return_null)
|
|
lea 15(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(match_case2_12):
|
|
test $0x01, %ah
|
|
jnz L(Exit9)
|
|
test $0x01, %dh
|
|
jnz L(return_null)
|
|
test $0x02, %ah
|
|
jnz L(Exit10)
|
|
test $0x02, %dh
|
|
jnz L(return_null)
|
|
test $0x04, %ah
|
|
jnz L(Exit11)
|
|
test $0x04, %dh
|
|
jnz L(return_null)
|
|
lea 11(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(match_case1):
|
|
test %al, %al
|
|
jz L(match_higth_case1)
|
|
|
|
test $0x01, %al
|
|
jnz L(Exit1)
|
|
test $0x02, %al
|
|
jnz L(Exit2)
|
|
test $0x04, %al
|
|
jnz L(Exit3)
|
|
test $0x08, %al
|
|
jnz L(Exit4)
|
|
test $0x10, %al
|
|
jnz L(Exit5)
|
|
test $0x20, %al
|
|
jnz L(Exit6)
|
|
test $0x40, %al
|
|
jnz L(Exit7)
|
|
lea 7(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(match_higth_case1):
|
|
test $0x01, %ah
|
|
jnz L(Exit9)
|
|
test $0x02, %ah
|
|
jnz L(Exit10)
|
|
test $0x04, %ah
|
|
jnz L(Exit11)
|
|
test $0x08, %ah
|
|
jnz L(Exit12)
|
|
test $0x10, %ah
|
|
jnz L(Exit13)
|
|
test $0x20, %ah
|
|
jnz L(Exit14)
|
|
test $0x40, %ah
|
|
jnz L(Exit15)
|
|
lea 15(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit1):
|
|
lea (%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit2):
|
|
lea 1(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit3):
|
|
lea 2(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit4):
|
|
lea 3(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit5):
|
|
lea 4(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit6):
|
|
lea 5(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit7):
|
|
lea 6(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit9):
|
|
lea 8(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit10):
|
|
lea 9(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit11):
|
|
lea 10(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit12):
|
|
lea 11(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit13):
|
|
lea 12(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit14):
|
|
lea 13(%edi), %eax
|
|
RETURN
|
|
|
|
.p2align 4
|
|
L(Exit15):
|
|
lea 14(%edi), %eax
|
|
RETURN
|
|
|
|
/* Return NULL. */
|
|
.p2align 4
|
|
L(return_null):
|
|
xor %eax, %eax
|
|
RETURN
|
|
|
|
END (__strchr_sse2)
|
|
#endif
|