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Diffstat (limited to 'sysdeps/s390/multiarch/strrchr-vx.S')
| -rw-r--r-- | sysdeps/s390/multiarch/strrchr-vx.S | 180 |
1 files changed, 0 insertions, 180 deletions
diff --git a/sysdeps/s390/multiarch/strrchr-vx.S b/sysdeps/s390/multiarch/strrchr-vx.S deleted file mode 100644 index 89a8f5f14c..0000000000 --- a/sysdeps/s390/multiarch/strrchr-vx.S +++ /dev/null @@ -1,180 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of strrchr. - 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 - -/* char *strrchr (const char *s, int c) - Locate the last character c in string. - - Register usage: - -r0=loaded bytes in first part of s. - -r1=pointer to last occurence of c or NULL if not found. - -r2=s - -r3=c - -r4=tmp - -r5=current_len - -v16=part of s - -v17=index of found element - -v18=replicated c - -v19=part of s with last occurence of c. - -v20=permute pattern -*/ -ENTRY(__strrchr_vx) - .machine "z13" - .machinemode "zarch_nohighgprs" - - 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. */ - - vlvgb %v18,%r3,0 /* Generate vector which elements are all c. - if c > 255, c will be truncated. */ - vrepb %v18,%v18,0 - - lghi %r1,-1 /* Currently no c found. */ - lghi %r5,0 /* current_len = 0. */ - - vfeezbs %v17,%v16,%v18 /* Find element equal or zero. */ - vlgvb %r4,%v17,7 /* Load byte index of c/zero or 16. */ - clrjl %r4,%r0,.Lfound_first_part /* Found c/zero in loaded bytes. */ -.Lalign: - /* 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. */ - -.Lloop: - vl %v16,0(%r5,%r2) /* Load s. */ - vfeezbs %v17,%v16,%v18 /* Find element equal with zero search. */ - jno .Lfound /* Found c/zero (cc=0|1|2). */ - vl %v16,16(%r5,%r2) - vfeezbs %v17,%v16,%v18 - jno .Lfound16 - vl %v16,32(%r5,%r2) - vfeezbs %v17,%v16,%v18 - jno .Lfound32 - vl %v16,48(%r5,%r2) - vfeezbs %v17,%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. */ - /* Save this part of s to check for further matches after reaching - the end of the complete string. */ - vlr %v19,%v16 - lgr %r1,%r5 - - jh .Lzero /* Found a zero after the found c. */ - aghi %r5,16 /* Start search of next part of s. */ - j .Lloop - -.Lfound_first_part: - /* This code is only executed if the found c/zero is whithin loaded - bytes. If no c/zero was found (cc==3) the found index = 16, thus - this code is not called. - Resulting condition code of vector find element equal: - cc==0: no c, found zero - cc==1: c found, no zero - cc==2: c found, found zero after c - cc==3: no c, no zero (this case can be ignored). */ - je .Lzero /* Found zero, but no c before that zero. */ - - locgrne %r1,%r5 /* Mark c as found in first part of s. */ - vlr %v19,%v16 - - jl .Lalign /* No zero (e.g. if vr was fully loaded) - -> Align and loop afterwards. */ - - /* Found a zero in vr. If vr was not fully loaded due to block - boundary, the remaining bytes are filled with zero and we can't - rely on zero indication of condition code here! */ - - vfenezb %v17,%v16,%v16 /* Find zero. */ - vlgvb %r4,%v17,7 /* Load byte index of zero or 16. */ - clrjl %r4,%r0,.Lzero /* Zero within loaded bytes -> end. */ - j .Lalign /* Align and loop afterwards. */ - -.Lend_searched_zero: - vlgvb %r4,%v17,7 /* Load byte index of zero. */ - algr %r5,%r4 - la %r2,0(%r5,%r2) /* Return pointer to zero. */ - br %r14 - -.Lzero: - /* Reached end of string. Check if one c was found before. */ - clije %r3,0,.Lend_searched_zero /* Found zero and c is zero. */ - - cgfi %r1,-1 /* No c found -> return NULL. */ - locghie %r2,0 - ber %r14 - - larl %r3,.Lpermute_mask /* Load permute mask. */ - vl %v20,0(%r3) - - /* c was found and is part of v19. */ - vfenezb %v17,%v19,%v19 /* Find zero. */ - vlgvb %r4,%v17,7 /* Load byte index of zero or 16. */ - - clgfi %r5,0 /* Loaded byte count in v19 is 16, ... */ - lochine %r0,16 /* ... if v19 is not the first part of s. */ - ahi %r0,-1 /* Convert byte count to highest index. */ - - clr %r0,%r4 - locrl %r4,%r0 /* r4 = min (zero-index, highest-index). */ - - /* Right-shift of v19 to mask bytes after zero. */ - clije %r4,15,.Lzero_permute /* No shift is needed if highest index - in vr is 15. */ - lhi %r0,15 - slr %r0,%r4 /* Compute byte count for vector shift right. */ - sll %r0,3 /* Convert to bit count. */ - vlvgb %v17,%r0,7 - vsrlb %v19,%v19,%v17 /* Vector shift right by byte by number of bytes - specified in bits 1-4 of byte 7 in v17. */ - - /* Reverse bytes in v19. */ -.Lzero_permute: - vperm %v19,%v19,%v19,%v20 /* Permute v19 to reversed order. */ - - /* Find c in reversed v19. */ - vfeeb %v19,%v19,%v18 /* Find c. */ - la %r2,0(%r1,%r2) - vlgvb %r3,%v19,7 /* Load byte index of c. */ - - /* Compute index in real s and return. */ - slgr %r4,%r3 - la %r2,0(%r4,%r2) /* Return pointer to zero. */ - br %r14 -.Lpermute_mask: - .byte 0x0F,0x0E,0x0D,0x0C,0x0B,0x0A,0x09,0x08 - .byte 0x07,0x06,0x05,0x04,0x03,0x02,0x01,0x00 -END(__strrchr_vx) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ |