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Diffstat (limited to 'sysdeps/s390/multiarch/strspn-vx.S')
| -rw-r--r-- | sysdeps/s390/multiarch/strspn-vx.S | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/sysdeps/s390/multiarch/strspn-vx.S b/sysdeps/s390/multiarch/strspn-vx.S deleted file mode 100644 index 6aa823e63b..0000000000 --- a/sysdeps/s390/multiarch/strspn-vx.S +++ /dev/null @@ -1,256 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of strspn. - 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 - -/* size_t strspn (const char *s, const char * accept) - The strspn() function calculates the length of the initial segment - of s which consists entirely of characters in accept. - - This method checks the length of accept string. If it fits entirely - in one vector register, a fast algorithm is used, which does not need - to check multiple parts of accept-string. Otherwise a slower full - check of accept-string is used. - - register overview: - r3: pointer to start of accept-string - r2: pointer to start of search-string - r4: loaded byte count of vl search-string - r0: found byte index - r1: current return len of s - v16: search-string - v17: accept-string - v18: temp-vreg - - ONLY FOR SLOW: - v19: first accept-string - v20: zero for preparing acc-vector - v21: global mask; 1 indicates a match between - search-string-vreg and any accept-character - v22: current mask; 1 indicates a match between - search-string-vreg and any accept-character in current acc-vreg - v30, v31: for re-/storing registers r6, r8, r9 - r5: current len of accept-string - r6: zero-index in search-string or 16 if no zero - or min(zero-index, loaded byte count) - r8: >0, if former accept-string-part contains a zero, - otherwise =0; - r9: loaded byte count of vlbb accept-string -*/ -ENTRY(__strspn_vx) - .machine "z13" - .machinemode "zarch_nohighgprs" - - /* - Check if accept-string fits in one vreg: - ---------------------------------------- - */ - vlbb %v17,0(%r3),6 /* Load accept. */ - lcbb %r4,0(%r3),6 - jo .Lcheck_onbb /* Special case if accept lays - on block-boundary. */ -.Lcheck_notonbb: - vistrbs %v17,%v17 /* Fill with zeros after first zero. */ - je .Lfast /* Zero found -> accept fits in one vreg. */ - j .Lslow /* No zero -> accept exceeds one vreg. */ - -.Lcheck_onbb: - /* Accept lays on block-boundary. */ - vfenezb %v18,%v17,%v17 /* Search zero in loaded accept bytes. */ - vlgvb %r0,%v18,7 /* Get index of zero or 16 if not found. */ - clrjl %r0,%r4,.Lcheck_notonbb /* Zero index < loaded bytes count -> - Accept fits in one vreg; - Fill with zeros and proceed - with FAST. */ - vl %v17,0(%r3) /* Load accept, which exceeds loaded bytes. */ - j .Lcheck_notonbb /* Check if accept fits in one vreg. */ - - - /* - Search s for accept in one vreg - ------------------------------- - */ -.Lfast: - /* Complete accept-string is in v17 and remaining bytes are zero. */ - - 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. */ - - vfaezbs %v16,%v16,%v17,8 /* Find first element in v16 - unequal to any in v17 - or first zero element. */ - vlgvb %r0,%v16,7 /* Load byte index of found element. */ - /* If found index is within loaded bytes (%r0 < %r1), - return with found element index (=equal count). */ - clr %r0,%r1 - locgrl %r2,%r0 - blr %r14 - - /* Align s to 16 byte. */ - risbgn %r4,%r2,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ - lghi %r1,16 /* current_len = 16. */ - slr %r1,%r4 /* Compute bytes to 16bytes boundary. */ - -.Lfast_loop: - vl %v16,0(%r1,%r2) /* Load search-string. */ - vfaezbs %v16,%v16,%v17,8 /* Find first element in v16 - unequal to any in v17 - or first zero element. */ - jno .Lfast_loop_found - vl %v16,16(%r1,%r2) - vfaezbs %v16,%v16,%v17,8 - jno .Lfast_loop_found16 - vl %v16,32(%r1,%r2) - vfaezbs %v16,%v16,%v17,8 - jno .Lfast_loop_found32 - vl %v16,48(%r1,%r2) - vfaezbs %v16,%v16,%v17,8 - jno .Lfast_loop_found48 - - aghi %r1,64 - j .Lfast_loop /* Loop if no element was unequal to accept - and not zero. */ - - /* Found unequal or zero element. */ -.Lfast_loop_found48: - aghi %r1,16 -.Lfast_loop_found32: - aghi %r1,16 -.Lfast_loop_found16: - aghi %r1,16 -.Lfast_loop_found: - vlgvb %r0,%v16,7 /* Load byte index of found element. */ - algrk %r2,%r1,%r0 /* And add it to current len. */ - br %r14 - - - /* - Search s for accept in multiple vregs - ------------------------------------- - */ -.Lslow: - /* Save registers. */ - vlvgg %v30,%r6,0 - vlvgp %v31,%r8,%r9 - lghi %r1,0 /* current_len = 0. */ - - /* Accept in v17 without zero. */ - vlr %v19,%v17 /* Save first acc-part for a fast reload. */ - vzero %v20 /* Zero for preparing acc-vector. */ - - /* Align s to 16 byte. */ - risbg %r0,%r2,60,128+63,0 /* Test if s is aligned and - %r0 = bits 60-63 'and' 15 */ - je .Lslow_loop_str /* If s is aligned, loop aligned */ - lghi %r4,15 - slr %r4,%r0 /* Compute highest index to load (15-x). */ - vll %v16,%r4,0(%r2) /* Load up to 16byte boundary (vll needs - highest index, left bytes are 0). */ - ahi %r4,1 /* Work with loaded byte count. */ - vzero %v21 /* Zero out global mask. */ - lghi %r5,0 /* Set current len of accept-string to zero. */ - vfenezb %v18,%v16,%v16 /* Find zero in current string-part. */ - lghi %r8,0 /* There is no zero in first accept-part. */ - vlgvb %r6,%v18,7 /* Load byte index of zero or 16 - if there is no zero. */ - clr %r4,%r6 /* cc==1 if loaded byte count < zero-index. */ - locrl %r6,%r4 /* Load on cc==1. */ - j .Lslow_loop_acc - - /* Process s in 16byte aligned loop. */ -.Lslow_next_str: - vlr %v17,%v19 /* Load first part of accept (no zero). */ - algfr %r1,%r4 /* Add loaded byte count to current len. */ -.Lslow_loop_str: - vl %v16,0(%r1,%r2) /* Load search-string. */ - lghi %r4,16 /* Loaded byte count is 16. */ - vzero %v21 /* Zero out global mask. */ - lghi %r5,0 /* Set current len of accept-string to zero. */ - vfenezb %v18,%v16,%v16 /* Find zero in current string-part. */ - lghi %r8,0 /* There is no zero in first accept-part. */ - vlgvb %r6,%v18,7 /* Load byte index of zero or 16 if no zero. */ - -.Lslow_loop_acc: - vfaeb %v22,%v16,%v17,4 /* Create matching-mask (1 in mask -> - character matches any accepted character in - this accept-string-part) IN=0, RT=1. */ - vo %v21,%v21,%v22 /* global-mask = global- | matching-mask. */ - vfenezb %v18,%v21,%v21 /* Find first zero in global-mask. */ - vlgvb %r0,%v18,7 /* Get first found zero-index - (= first mismatch). */ - clrjl %r0,%r6,.Lslow_next_acc /* Mismatch-index < min(lbc,zero-index) - -> Process this string-part - with next acc-part. */ - clrjhe %r0,%r4,.Lslow_next_str /* Found-index >= loaded byte count - -> All loaded bytes are matching - any accept-character - and are not zero. */ - /* All bytes are matching any characters in accept-string - and search-string is fully processed (found-index == zero-index) */ -.Lslow_add_lbc_end: - algrk %r2,%r1,%r0 /* Add matching characters to current_len. */ - /* Restore registers. */ - vlgvg %r6,%v30,0 - vlgvg %r8,%v31,0 - vlgvg %r9,%v31,1 - br %r14 - - - -.Lslow_next_acc: - clijh %r8,0,.Lslow_add_lbc_end /* There was a zero in last acc-part - -> Add found index to current len - and end. */ - vlbb %v17,16(%r5,%r3),6 /* Load next accept part. */ - aghi %r5,16 /* Add current_len of accept-string. */ - lcbb %r9,0(%r5,%r3),6 /* Get loaded byte count of accept-string. */ - jo .Lslow_next_acc_onbb /* Jump away if accept-string is - on block-boundary. */ -.Lslow_next_acc_notonbb: - vistrbs %v17,%v17 /* Fill with zeros after first zero. */ - jo .Lslow_loop_acc /* No zero found -> no preparation needed. */ - -.Lslow_next_acc_prepare_zero: - /* Zero in accept-part: fill zeros with first-accept-character. */ - vlgvb %r8,%v17,0 /* Load first element of acc-part. */ - clije %r8,0,.Lslow_add_lbc_end /* End if zero is first character - in this part of accept-string. */ - /* r8>0 -> zero found in this acc-part. */ - vrepb %v18,%v17,0 /* Replicate first char accross all chars. */ - vceqb %v22,%v20,%v17 /* Create a mask (v22) of null chars - by comparing with 0 (v20). */ - vsel %v17,%v18,%v17,%v22 /* Replace null chars with first char. */ - j .Lslow_loop_acc /* Accept part is prepared -> process. */ - -.Lslow_next_acc_onbb: - vfenezb %v18,%v17,%v17 /* Find zero in loaded bytes of accept part. */ - vlgvb %r8,%v18,7 /* Load byte index of zero. */ - clrjl %r8,%r9,.Lslow_next_acc_notonbb /* Found a zero in loaded bytes - -> Prepare vr. */ - vl %v17,0(%r5,%r3) /* Load over boundary ... */ - lghi %r8,0 /* r8=0 -> no zero in this part of acc, - Check for zero is in jump-target. */ - j .Lslow_next_acc_notonbb /* ... and search for zero in - fully loaded vreg again. */ -END(__strspn_vx) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ |