mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 01:00:07 +00:00
132 lines
3.7 KiB
ArmAsm
132 lines
3.7 KiB
ArmAsm
/* Vector optimized 32/64 bit S/390 version of wcscmp.
|
|
Copyright (C) 2015-2017 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/>. */
|
|
|
|
#if defined HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc)
|
|
|
|
# include "sysdep.h"
|
|
# include "asm-syntax.h"
|
|
|
|
.text
|
|
|
|
/* int wcscmp (const wchar_t *s1, const wchar_t *s2)
|
|
Compare two strings
|
|
|
|
Register usage:
|
|
-r1=loaded byte count s1
|
|
-r2=s1
|
|
-r3=s2
|
|
-r4=loaded byte coutn s2, tmp
|
|
-r5=current_len
|
|
-v16=part of s1
|
|
-v17=part of s2
|
|
-v18=index of unequal
|
|
*/
|
|
ENTRY(__wcscmp_vx)
|
|
.machine "z13"
|
|
.machinemode "zarch_nohighgprs"
|
|
|
|
lghi %r5,0 /* current_len = 0. */
|
|
|
|
.Lloop:
|
|
vlbb %v16,0(%r5,%r2),6 /* Load s1 to block boundary. */
|
|
vlbb %v17,0(%r5,%r3),6 /* Load s2 to block boundary. */
|
|
lcbb %r1,0(%r5,%r2),6 /* Get loaded byte count of s1. */
|
|
jo .Llt16_1 /* Jump away if vr is not fully loaded. */
|
|
lcbb %r4,0(%r5,%r3),6
|
|
jo .Llt16_2 /* Jump away if vr is not fully loaded. */
|
|
/* Both vrs are fully loaded. */
|
|
aghi %r5,16
|
|
vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */
|
|
jno .Lfound
|
|
|
|
vlbb %v16,0(%r5,%r2),6
|
|
vlbb %v17,0(%r5,%r3),6
|
|
lcbb %r1,0(%r5,%r2),6
|
|
jo .Llt16_1
|
|
lcbb %r4,0(%r5,%r3),6
|
|
jo .Llt16_2
|
|
aghi %r5,16
|
|
vfenezfs %v18,%v16,%v17
|
|
jno .Lfound
|
|
|
|
vlbb %v16,0(%r5,%r2),6
|
|
vlbb %v17,0(%r5,%r3),6
|
|
lcbb %r1,0(%r5,%r2),6
|
|
jo .Llt16_1
|
|
lcbb %r4,0(%r5,%r3),6
|
|
jo .Llt16_2
|
|
aghi %r5,16
|
|
vfenezfs %v18,%v16,%v17
|
|
jno .Lfound
|
|
|
|
vlbb %v16,0(%r5,%r2),6
|
|
vlbb %v17,0(%r5,%r3),6
|
|
lcbb %r1,0(%r5,%r2),6
|
|
jo .Llt16_1
|
|
lcbb %r4,0(%r5,%r3),6
|
|
jo .Llt16_2
|
|
aghi %r5,16
|
|
vfenezfs %v18,%v16,%v17
|
|
jno .Lfound
|
|
j .Lloop
|
|
|
|
.Lcmp_one_char:
|
|
/* At least one of both strings is not 4-byte aligned
|
|
and there is no full character before next block-boundary.
|
|
Compare one character to get over the boundary and
|
|
proceed with normal loop! */
|
|
vlef %v16,0(%r5,%r2),0 /* Load one character. */
|
|
vlef %v17,0(%r5,%r3),0
|
|
lghi %r1,4 /* Loaded byte count is 4. */
|
|
j .Llt_cmp /* Proceed with comparision. */
|
|
|
|
.Llt16_1:
|
|
lcbb %r4,0(%r5,%r3),6 /* Get loaded byte count of s2. */
|
|
.Llt16_2:
|
|
clr %r1,%r4
|
|
locrh %r1,%r4 /* Get minimum of bytes loaded in s1/2. */
|
|
nill %r1,65532 /* Align bytes loaded to full characters. */
|
|
jz .Lcmp_one_char /* Jump away if no full char is available. */
|
|
.Llt_cmp:
|
|
algfr %r5,%r1 /* Add smallest loaded bytes to current_len. */
|
|
vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */
|
|
vlgvb %r4,%v18,7 /* Get not equal index or 16 if all equal. */
|
|
clrjl %r4,%r1,.Lfound /* Jump away if miscompare is within loaded
|
|
bytes. */
|
|
j .Lloop
|
|
|
|
.Lfound:
|
|
/* vfenezf found an unequal element or zero.
|
|
This instruction compares unsigned words, but wchar_t is signed.
|
|
Thus we have to compare the found element again. */
|
|
vlgvb %r4,%v18,7 /* Extract not equal byte-index, */
|
|
srl %r4,2 /* Convert it to character-index. */
|
|
vlgvf %r3,%v16,0(%r4) /* Load character-values. */
|
|
vlgvf %r4,%v17,0(%r4)
|
|
cr %r3,%r4
|
|
je .Lend_equal
|
|
lghi %r2,1
|
|
lghi %r1,-1
|
|
locgrl %r2,%r1
|
|
br %r14
|
|
.Lend_equal:
|
|
lghi %r2,0
|
|
br %r14
|
|
END(__wcscmp_vx)
|
|
#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
|