mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-13 23:00:22 +00:00
104 lines
2.9 KiB
ArmAsm
104 lines
2.9 KiB
ArmAsm
/* Vector optimized 32/64 bit S/390 version of wcschr.
|
|
Copyright (C) 2015-2016 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
|
|
|
|
/* wchar_t *wcschr (const wchar_t *s, wchar_t c)
|
|
Locate character in string.
|
|
|
|
Register usage:
|
|
-r1=tmp
|
|
-r2=s
|
|
-r3=c
|
|
-r4=tmp
|
|
-r5=current_len
|
|
-v16=part of s
|
|
-v17=index of unequal
|
|
-v18=replicated c
|
|
*/
|
|
ENTRY(__wcschr_vx)
|
|
.machine "z13"
|
|
.machinemode "zarch_nohighgprs"
|
|
|
|
vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */
|
|
lcbb %r1,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */
|
|
|
|
tmll %r2,3 /* Test if s is 4-byte aligned? */
|
|
jne .Lfallback /* And use common-code variant if not. */
|
|
|
|
lghi %r5,0 /* current_len = 0. */
|
|
|
|
vlvgf %v18,%r3,0 /* Generate vector which elements are all c. */
|
|
vrepf %v18,%v18,0
|
|
|
|
vfeezfs %v16,%v16,%v18 /* Find element equal with zero search. */
|
|
vlgvb %r4,%v16,7 /* Load byte index of character or zero. */
|
|
clrjl %r4,%r1,.Lfound /* Return if c/zero is in loaded bytes. */
|
|
|
|
/* Align s to 16 byte. */
|
|
risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */
|
|
lghi %r5,16 /* current_len = 16. */
|
|
slr %r5,%r4 /* Compute bytes to 16bytes boundary. */
|
|
|
|
/* Find c/zero in 16byte aligned loop */
|
|
.Lloop:
|
|
vl %v16,0(%r5,%r2) /* Load s. */
|
|
vfeezfs %v16,%v16,%v18 /* Find element equal with zero search. */
|
|
jno .Lfound /* Found c/zero (cc=0|1|2). */
|
|
vl %v16,16(%r5,%r2)
|
|
vfeezfs %v16,%v16,%v18
|
|
jno .Lfound16
|
|
vl %v16,32(%r5,%r2)
|
|
vfeezfs %v16,%v16,%v18
|
|
jno .Lfound32
|
|
vl %v16,48(%r5,%r2)
|
|
vfeezfs %v16,%v16,%v18
|
|
jno .Lfound48
|
|
|
|
aghi %r5,64
|
|
j .Lloop /* No character and no zero -> loop. */
|
|
|
|
.Lfound48:
|
|
la %r5,16(%r5) /* Use la since aghi would clobber cc. */
|
|
.Lfound32:
|
|
la %r5,16(%r5)
|
|
.Lfound16:
|
|
la %r5,16(%r5)
|
|
.Lfound:
|
|
je .Lzero /* Found zero, but no c before that zero. */
|
|
|
|
.Lcharacter:
|
|
vlgvb %r4,%v16,7 /* Load byte index of character. */
|
|
algr %r5,%r4
|
|
la %r2,0(%r5,%r2) /* Return pointer to character. */
|
|
br %r14
|
|
|
|
.Lzero:
|
|
clije %r3,0,.Lcharacter /* Found zero and c is zero. */
|
|
lghi %r2,0 /* Return null if character not found. */
|
|
br %r14
|
|
.Lfallback:
|
|
jg __wcschr_c
|
|
END(__wcschr_vx)
|
|
#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */
|