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Diffstat (limited to 'sysdeps/s390/multiarch/memchr-vx.S')
| -rw-r--r-- | sysdeps/s390/multiarch/memchr-vx.S | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/sysdeps/s390/multiarch/memchr-vx.S b/sysdeps/s390/multiarch/memchr-vx.S deleted file mode 100644 index 77d31e0036..0000000000 --- a/sysdeps/s390/multiarch/memchr-vx.S +++ /dev/null @@ -1,159 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of memchr. - Copyright (C) 2015-2018 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 - -/* void *memchr (const void *s, int c, size_t n) - Scans memory for character c - and returns pointer to first c. - - Register usage: - -r0=tmp - -r1=tmp - -r2=s - -r3=c - -r4=n - -r5=current_len - -v16=part of s - -v17=index of found c - -v18=c replicated -*/ -ENTRY(__memchr_vx) - - .machine "z13" - .machinemode "zarch_nohighgprs" - -# if !defined __s390x__ - llgfr %r4,%r4 -# endif /* !defined __s390x__ */ - - clgije %r4,0,.Lnf_end /* If len == 0 then exit. */ - - vlbb %v16,0(%r2),6 /* Load s until next 4k-byte boundary. */ - lcbb %r0,0(%r2),6 /* Get bytes to 4k-byte boundary or 16. */ - llgfr %r0,%r0 /* Convert 32bit to 64bit. */ - - vlvgb %v18,%r3,0 /* Generate vector which elements are all c. - if c > 255, c will be truncated. */ - vrepb %v18,%v18,0 - lghi %r5,16 /* current_len = 16. */ - - clgrjhe %r0,%r4,.Llastcmp /* If (bytes to boundary) >= n, - jump to lastcmp. */ - - vfeebs %v17,%v16,%v18 /* Find c. */ - vlgvb %r1,%v17,7 /* Load byte index of c. */ - clgrjl %r1,%r0,.Lfound2 /* Found c is within loaded bytes. */ - - /* Align s to 16 byte. */ - risbgn %r1,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ - slr %r5,%r1 /* Compute bytes to 16bytes boundary. */ - - lgr %r0,%r5 /* If %r5 + 64 < n? -> loop64. */ - aghi %r0,64 - clgrjl %r0,%r4,.Lloop64 -.Llt64: - vl %v16,0(%r5,%r2) - aghi %r5,16 - clgrjhe %r5,%r4,.Llastcmp /* Do last compare if curr-len >= n. */ - vfeebs %v17,%v16,%v18 /* Find c. */ - jl .Lfound /* Jump away if c was found. */ - - vl %v16,0(%r5,%r2) - aghi %r5,16 - clgrjhe %r5,%r4,.Llastcmp - vfeebs %v17,%v16,%v18 - jl .Lfound - - vl %v16,0(%r5,%r2) - aghi %r5,16 - clgrjhe %r5,%r4,.Llastcmp - vfeebs %v17,%v16,%v18 - jl .Lfound - - vl %v16,0(%r5,%r2) - aghi %r5,16 - -.Llastcmp: - /* Use comparision result only if located within first n characters. - %r5: current_len; - %r4: n; - (current_len - n): [0...16[ - first ignored match index: vr-width - (current_len - n) ]0...16] - */ - vfeebs %v17,%v16,%v18 /* Find c. */ - slgrk %r4,%r5,%r4 /* %r5 = current_len - n. */ - lghi %r0,16 /* Register width = 16. */ - vlgvb %r1,%v17,7 /* Extract found index or 16 if all equal. */ - slr %r0,%r4 /* %r0 = first ignored match index. */ - clrjl %r1,%r0,.Lfound2 /* Go away if miscompare is below n bytes. */ - /* c not found within n-bytes. */ -.Lnf_end: - lghi %r2,0 /* Return null. */ - br %r14 - -.Lfound48: - aghi %r5,16 -.Lfound32: - aghi %r5,16 -.Lfound16: - aghi %r5,16 -.Lfound0: - aghi %r5,16 -.Lfound: - vlgvb %r1,%v17,7 /* Load byte index of c. */ -.Lfound2: - slgfi %r5,16 /* current_len -=16 */ - algr %r5,%r1 /* Zero byte index is added to current len. */ - la %r2,0(%r5,%r2) /* Return pointer to c. */ - br %r14 - - -.Lloop64: - vl %v16,0(%r5,%r2) - vfeebs %v17,%v16,%v18 /* Find c. */ - jl .Lfound0 /* Jump away if c was found. */ - vl %v16,16(%r5,%r2) - vfeebs %v17,%v16,%v18 - jl .Lfound16 - vl %v16,32(%r5,%r2) - vfeebs %v17,%v16,%v18 - jl .Lfound32 - vl %v16,48(%r5,%r2) - vfeebs %v17,%v16,%v18 - jl .Lfound48 - - aghi %r5,64 - lgr %r0,%r5 /* If %r5 + 64 < n? -> loop64. */ - aghi %r0,64 - clgrjl %r0,%r4,.Lloop64 - - j .Llt64 -END(__memchr_vx) - -# define memchr __memchr_c -# undef libc_hidden_builtin_def -# define libc_hidden_builtin_def(name) strong_alias(__memchr_c, __GI_memchr) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ - -#include <memchr.S> |