mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-27 12:15:39 +03:00
128 lines
3.7 KiB
ArmAsm
128 lines
3.7 KiB
ArmAsm
/* Optimized strcasecmp implementation for PowerPC64.
|
|
Copyright (C) 2011-2025 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/>. */
|
|
|
|
#include <sysdep.h>
|
|
#include <locale-defines.h>
|
|
|
|
/* int [r3] strcasecmp (const char *s1 [r3], const char *s2 [r4] )
|
|
|
|
or if defined USE_IN_EXTENDED_LOCALE_MODEL:
|
|
|
|
int [r3] strcasecmp_l (const char *s1 [r3], const char *s2 [r4],
|
|
locale_t loc [r5]) */
|
|
|
|
#ifndef STRCMP
|
|
# define __STRCMP __strcasecmp
|
|
# define STRCMP strcasecmp
|
|
#endif
|
|
|
|
#ifndef USE_IN_EXTENDED_LOCALE_MODEL
|
|
ENTRY (__STRCMP)
|
|
CALL_MCOUNT 2
|
|
#else
|
|
ENTRY_TOCLESS (__STRCMP)
|
|
CALL_MCOUNT 3
|
|
#endif
|
|
|
|
#define rRTN r3 /* Return value */
|
|
#define rSTR1 r5 /* 1st string */
|
|
#define rSTR2 r4 /* 2nd string */
|
|
#define rLOCARG r5 /* 3rd argument: locale_t */
|
|
#define rCHAR1 r6 /* Byte read from 1st string */
|
|
#define rCHAR2 r7 /* Byte read from 2nd string */
|
|
#define rADDR1 r8 /* Address of tolower(rCHAR1) */
|
|
#define rADDR2 r12 /* Address of tolower(rCHAR2) */
|
|
#define rLWR1 r8 /* Word tolower(rCHAR1) */
|
|
#define rLWR2 r12 /* Word tolower(rCHAR2) */
|
|
#define rTMP r9
|
|
#define rLOC r11 /* Default locale address */
|
|
|
|
cmpd cr7, r3, r4
|
|
#ifndef USE_IN_EXTENDED_LOCALE_MODEL
|
|
ld rTMP, __libc_tsd_LOCALE@got@tprel(r2)
|
|
add rLOC, rTMP, __libc_tsd_LOCALE@tls
|
|
ld rLOC, 0(rLOC)
|
|
#else
|
|
mr rLOC, rLOCARG
|
|
#endif
|
|
ld rLOC, LOCALE_CTYPE_TOLOWER(rLOC)
|
|
mr rSTR1, rRTN
|
|
li rRTN, 0
|
|
beqlr cr7
|
|
|
|
|
|
/* Unrolling loop for POWER: loads are done with 'lbz' plus
|
|
offset and string descriptors are only updated in the end
|
|
of loop unrolling. */
|
|
|
|
lbz rCHAR1, 0(rSTR1) /* Load char from s1 */
|
|
lbz rCHAR2, 0(rSTR2) /* Load char from s2 */
|
|
L(loop):
|
|
cmpdi rCHAR1, 0 /* *s1 == '\0' ? */
|
|
sldi rADDR1, rCHAR1, 2 /* Calculate address for tolower(*s1) */
|
|
sldi rADDR2, rCHAR2, 2 /* Calculate address for tolower(*s2) */
|
|
lwzx rLWR1, rLOC, rADDR1 /* Load tolower(*s1) */
|
|
lwzx rLWR2, rLOC, rADDR2 /* Load tolower(*s2) */
|
|
cmpw cr1, rLWR1, rLWR2 /* r = tolower(*s1) == tolower(*s2) ? */
|
|
crorc 4*cr1+eq,eq,4*cr1+eq /* (*s1 != '\0') || (r == 1) */
|
|
beq cr1, L(done)
|
|
lbz rCHAR1, 1(rSTR1)
|
|
lbz rCHAR2, 1(rSTR2)
|
|
cmpdi rCHAR1, 0
|
|
sldi rADDR1, rCHAR1, 2
|
|
sldi rADDR2, rCHAR2, 2
|
|
lwzx rLWR1, rLOC, rADDR1
|
|
lwzx rLWR2, rLOC, rADDR2
|
|
cmpw cr1, rLWR1, rLWR2
|
|
crorc 4*cr1+eq,eq,4*cr1+eq
|
|
beq cr1, L(done)
|
|
lbz rCHAR1, 2(rSTR1)
|
|
lbz rCHAR2, 2(rSTR2)
|
|
cmpdi rCHAR1, 0
|
|
sldi rADDR1, rCHAR1, 2
|
|
sldi rADDR2, rCHAR2, 2
|
|
lwzx rLWR1, rLOC, rADDR1
|
|
lwzx rLWR2, rLOC, rADDR2
|
|
cmpw cr1, rLWR1, rLWR2
|
|
crorc 4*cr1+eq,eq,4*cr1+eq
|
|
beq cr1, L(done)
|
|
lbz rCHAR1, 3(rSTR1)
|
|
lbz rCHAR2, 3(rSTR2)
|
|
cmpdi rCHAR1, 0
|
|
/* Increment both string descriptors */
|
|
addi rSTR1, rSTR1, 4
|
|
addi rSTR2, rSTR2, 4
|
|
sldi rADDR1, rCHAR1, 2
|
|
sldi rADDR2, rCHAR2, 2
|
|
lwzx rLWR1, rLOC, rADDR1
|
|
lwzx rLWR2, rLOC, rADDR2
|
|
cmpw cr1, rLWR1, rLWR2
|
|
crorc 4*cr1+eq,eq,4*cr1+eq
|
|
beq cr1,L(done)
|
|
lbz rCHAR1, 0(rSTR1) /* Load char from s1 */
|
|
lbz rCHAR2, 0(rSTR2) /* Load char from s2 */
|
|
b L(loop)
|
|
L(done):
|
|
subf r0, rLWR2, rLWR1
|
|
extsw rRTN, r0
|
|
blr
|
|
END (__STRCMP)
|
|
|
|
weak_alias (__STRCMP, STRCMP)
|
|
libc_hidden_builtin_def (__STRCMP)
|