| /* Optimized strcasecmp implementation for PowerPC32. |
| Copyright (C) 2011-2014 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> |
| #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 |
| |
| ENTRY (__STRCMP) |
| |
| #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 /* Byte tolower(rCHAR1) */ |
| #define rLWR2 r12 /* Byte tolower(rCHAR2) */ |
| #define rTMP r0 |
| #define rGOT r9 /* Address of the Global Offset Table */ |
| #define rLOC r11 /* Default locale address */ |
| |
| cmpw cr7, r3, r4 |
| #ifndef USE_IN_EXTENDED_LOCALE_MODEL |
| # ifdef SHARED |
| mflr rTMP |
| bcl 20,31,.L1 |
| .L1: mflr rGOT |
| addis rGOT, rGOT, _GLOBAL_OFFSET_TABLE_-.L1@ha |
| addi rGOT, rGOT, _GLOBAL_OFFSET_TABLE_-.L1@l |
| lwz rLOC, __libc_tsd_LOCALE@got@tprel(rGOT) |
| add rLOC, rLOC, __libc_tsd_LOCALE@tls |
| lwz rLOC, 0(rLOC) |
| mtlr rTMP |
| # else |
| lis rTMP,_GLOBAL_OFFSET_TABLE_@ha |
| la rLOC,_GLOBAL_OFFSET_TABLE_@l(rTMP) |
| lwz rLOC, __libc_tsd_LOCALE@got@tprel(rGOT) |
| add rLOC, rLOC, __libc_tsd_LOCALE@tls |
| lwz rLOC, 0(rLOC) |
| # endif /* SHARED */ |
| #else |
| mr rLOC, rLOCARG |
| #endif |
| mr rSTR1, rRTN |
| lwz rLOC, LOCALE_CTYPE_TOLOWER(rLOC) |
| 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. */ |
| |
| L(loop): |
| lbz rCHAR1, 0(rSTR1) /* Load char from s1 */ |
| lbz rCHAR2, 0(rSTR2) /* Load char from s2 */ |
| 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) */ |
| cmpwi cr7, rCHAR1, 0 /* *s1 == '\0' ? */ |
| subf. r3, rLWR2, rLWR1 |
| bnelr |
| beqlr cr7 |
| lbz rCHAR1, 1(rSTR1) |
| lbz rCHAR2, 1(rSTR2) |
| sldi rADDR1, rCHAR1, 2 |
| sldi rADDR2, rCHAR2, 2 |
| lwzx rLWR1, rLOC, rADDR1 |
| lwzx rLWR2, rLOC, rADDR2 |
| cmpwi cr7, rCHAR1, 0 |
| subf. r3, rLWR2, rLWR1 |
| bnelr |
| beqlr cr7 |
| lbz rCHAR1, 2(rSTR1) |
| lbz rCHAR2, 2(rSTR2) |
| sldi rADDR1, rCHAR1, 2 |
| sldi rADDR2, rCHAR2, 2 |
| lwzx rLWR1, rLOC, rADDR1 |
| lwzx rLWR2, rLOC, rADDR2 |
| cmpwi cr7, rCHAR1, 0 |
| subf. r3, rLWR2, rLWR1 |
| bnelr |
| beqlr cr7 |
| lbz rCHAR1, 3(rSTR1) |
| lbz rCHAR2, 3(rSTR2) |
| /* 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 |
| cmpwi cr7, rCHAR1, 0 |
| subf. r3, rLWR2, rLWR1 |
| bnelr |
| bne cr7,L(loop) |
| blr |
| END (__STRCMP) |
| |
| weak_alias (__STRCMP, STRCMP) |
| libc_hidden_builtin_def (__STRCMP) |
