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Diffstat (limited to 'sysdeps/s390/multiarch/memccpy-vx.S')
-rw-r--r-- | sysdeps/s390/multiarch/memccpy-vx.S | 156 |
1 files changed, 0 insertions, 156 deletions
diff --git a/sysdeps/s390/multiarch/memccpy-vx.S b/sysdeps/s390/multiarch/memccpy-vx.S deleted file mode 100644 index f60aecef77..0000000000 --- a/sysdeps/s390/multiarch/memccpy-vx.S +++ /dev/null @@ -1,156 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of memccpy. - 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 - -/* void *memccpy (void * dest, const void *src, int c, size_t n) - Copies no more than n bytes from src to dest, - stopping when the character c is found - and returns pointer next to c in dest or null if c not found. - - Register usage: - -r0=tmp - -r1=tmp - -r2=dest - -r3=src - -r4=c - -r5=n - -r6=current_len - -v16=part of s - -v17=index of found c - -v18=c replicated - -v19=part #2 of s - -v31=save area for r6 -*/ -ENTRY(__memccpy_vx) - .machine "z13" - .machinemode "zarch_nohighgprs" - -# if !defined __s390x__ - llgfr %r5,%r5 -# endif /* !defined __s390x__ */ - - vlvgp %v31,%r6,%r7 /* Save registers. */ - clgije %r5,0,.Lnf_end /* If len == 0 then exit. */ - - vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */ - lcbb %r0,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */ - llgfr %r0,%r0 /* Convert 32bit to 64bit. */ - - vlvgb %v18,%r4,0 /* Generate vector which elements are all c. - if c > 255, c will be truncated. */ - vrepb %v18,%v18,0 - lghi %r6,0 /* current_len = 0. */ - - clgrjle %r5,%r0,.Lremaining_v16 /* If maxlen <= loaded-bytes - -> Process remaining. */ - - vfeebs %v17,%v16,%v18 /* Find c. */ - vlgvb %r1,%v17,7 /* Load byte index of c. */ - clgrjl %r1,%r0,.Lfound_v16 /* Found c is within loaded bytes. */ - - /* Align s to 16 byte. */ - risbgn %r1,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ - lghi %r6,15 /* current_len = 15. */ - slr %r6,%r1 /* Compute highest index to 16byte boundary. */ - - vstl %v16,%r6,0(%r2) /* Store prcessed bytes */ - ahi %r6,1 - -.Lpreloop1: - /* Now we are 16byte aligned, so we can load - a full vreg without page fault. */ - vl %v16,0(%r6,%r3) /* Load s. */ - clgijl %r5,17,.Lremaining_v16 /* If n <= 16, - process remaining bytes. */ - lgr %r7,%r5 - slgfi %r7,16 /* border_len = n - 16. */ - j .Lloop1 - -.Lloop2: - vl %v16,16(%r6,%r3) - vst %v19,0(%r6,%r2) - aghi %r6,16 - -.Lloop1: - clgrjhe %r6,%r7,.Lremaining_v16 /* If current_len >= border - then process remaining bytes. */ - vfeebs %v17,%v16,%v18 /* Find c. */ - jl .Lfound_v16 /* Jump away if c was found. */ - vl %v19,16(%r6,%r3) /* Load next s part. */ - vst %v16,0(%r6,%r2) /* Store previous part without c. */ - aghi %r6,16 - - clgrjhe %r6,%r7,.Lremaining_v19 - vfeebs %v17,%v19,%v18 - jl .Lfound_v19 - vl %v16,16(%r6,%r3) - vst %v19,0(%r6,%r2) - aghi %r6,16 - - clgrjhe %r6,%r7,.Lremaining_v16 - vfeebs %v17,%v16,%v18 - jl .Lfound_v16 - vl %v19,16(%r6,%r3) - vst %v16,0(%r6,%r2) - aghi %r6,16 - - clgrjhe %r6,%r7,.Lremaining_v19 - vfeebs %v17,%v19,%v18 - jo .Lloop2 - -.Lfound_v19: - vlr %v16,%v19 -.Lfound_v16: - /* v16 contains c. Store remaining bytes to c. currlen hasnĀ“t - reached border, thus checking for maxlen is not needed! */ - vlgvb %r1,%v17,7 /* Load byte index of c. */ - la %r2,0(%r6,%r2) /* vstl has no support for index-register. */ -.Lfound_v16_store: - vstl %v16,%r1,0(%r2) /* Copy bytes including c. */ - la %r2,1(%r1,%r2) /* Return pointer next to c in dest. */ - vlgvg %r6,%v31,0 - vlgvg %r7,%v31,1 - br %r14 - -.Lremaining_v19: - vlr %v16,%v19 -.Lremaining_v16: - /* v16 contains the remaining bytes [1...16]. - Check and store remaining bytes. */ - vfeebs %v17,%v16,%v18 - slgrk %r7,%r5,%r6 /* Remaining bytes = maxlen - current_len. */ - aghi %r7,-1 /* vstl needs highest index. */ - la %r2,0(%r6,%r2) /* vstl has no index register. */ - vlgvb %r1,%v17,7 /* Load index of c or 16 if not found. */ - /* c in remaining bytes? -> Jump away (c-index <= max-index) */ - clrjle %r1,%r7,.Lfound_v16_store - vstl %v16,%r7,0(%r2) /* Store remaining bytes. */ - -.Lnf_end: - vlgvg %r6,%v31,0 - vlgvg %r7,%v31,1 - lghi %r2,0 /* Return null. */ - br %r14 -END(__memccpy_vx) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ |