diff options
Diffstat (limited to 'sysdeps/s390/multiarch/wcsncmp-vx.S')
| -rw-r--r-- | sysdeps/s390/multiarch/wcsncmp-vx.S | 177 |
1 files changed, 0 insertions, 177 deletions
diff --git a/sysdeps/s390/multiarch/wcsncmp-vx.S b/sysdeps/s390/multiarch/wcsncmp-vx.S deleted file mode 100644 index e44c53a1a9..0000000000 --- a/sysdeps/s390/multiarch/wcsncmp-vx.S +++ /dev/null @@ -1,177 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of wcsncmp. - 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 - -/* int wcsncmp (const wchar_t *s1, const wchar_t *s2, size_t n) - Compare at most n characters of two strings. - - Register usage: - -r0=tmp - -r1=tmp - -r2=s1 - -r3=s2 - -r4=n - -r5=current_len - -v16=part of s1 - -v17=part of s2 - -v18=index of unequal -*/ -ENTRY(__wcsncmp_vx) - .machine "z13" - .machinemode "zarch_nohighgprs" - -# if !defined __s390x__ - llgfr %r4,%r4 -# endif /* !defined __s390x__ */ - - clgije %r4,0,.Lend_equal /* Nothing to do if n == 0. */ - - /* Check range of n and convert to byte-count. */ -# ifdef __s390x__ - tmhh %r4,49152 /* Test bit 0 or 1 of maxlen. */ - lghi %r1,-4 /* Max byte-count is 18446744073709551612. */ -# else - tmlh %r4,49152 /* Test bit 0 or 1 of maxlen. */ - llilf %r1,4294967292 /* Max byte-count is 4294967292. */ -# endif /* !__s390x__ */ - sllg %r4,%r4,2 /* Convert character-count to byte-count. */ - locgrne %r4,%r1 /* Use max byte-count, if bit 0/1 was one. */ - - /* Check first character without vector load. */ - lghi %r5,4 /* current_len = 4 bytes. */ - /* Check s1/2[0]. */ - lt %r0,0(%r2) - l %r1,0(%r3) - je .Lend_cmp_one_char - crjne %r0,%r1,.Lend_cmp_one_char - -.Lloop: - vlbb %v17,0(%r5,%r3),6 /* Load s2 to block boundary. */ - vlbb %v16,0(%r5,%r2),6 /* Load s1 to block boundary. */ - lcbb %r0,0(%r5,%r2),6 /* Get loaded byte count of s1. */ - jo .Llt16_1 /* Jump away if vector not fully loaded. */ - lcbb %r1,0(%r5,%r3),6 /* Get loaded byte count of s2. */ - jo .Llt16_2 /* Jump away if vector not fully loaded. */ - aghi %r5,16 /* Both vectors are fully loaded. */ - vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */ - clgrjhe %r5,%r4,.Llastcmp /* If current_len >= n ->last compare. */ - jno .Lfound - - vlbb %v17,0(%r5,%r3),6 - vlbb %v16,0(%r5,%r2),6 - lcbb %r0,0(%r5,%r2),6 - jo .Llt16_1 - lcbb %r1,0(%r5,%r3),6 - jo .Llt16_2 - aghi %r5,16 - vfenezfs %v18,%v16,%v17 - clgrjhe %r5,%r4,.Llastcmp - jno .Lfound - - vlbb %v17,0(%r5,%r3),6 - vlbb %v16,0(%r5,%r2),6 - lcbb %r0,0(%r5,%r2),6 - jo .Llt16_1 - lcbb %r1,0(%r5,%r3),6 - jo .Llt16_2 - aghi %r5,16 - vfenezfs %v18,%v16,%v17 - clgrjhe %r5,%r4,.Llastcmp - jno .Lfound - - vlbb %v17,0(%r5,%r3),6 - vlbb %v16,0(%r5,%r2),6 - lcbb %r0,0(%r5,%r2),6 - jo .Llt16_1 - lcbb %r1,0(%r5,%r3),6 - jo .Llt16_2 - aghi %r5,16 - vfenezfs %v18,%v16,%v17 - clgrjhe %r5,%r4,.Llastcmp - jno .Lfound - - j .Lloop - -.Llt16_1: - lcbb %r1,0(%r5,%r3),6 /* Get loaded byte count of s2. */ -.Llt16_2: - clr %r0,%r1 /* Compare logical. */ - locrh %r0,%r1 /* Compute minimum of bytes loaded. */ - nill %r0,65532 /* Align bytes loaded to full characters. */ - jz .Lcmp_one_char /* Jump away if no full char is available. */ -.Llt_cmp: - algfr %r5,%r0 /* Add smallest loaded bytes to current_len. */ - vfenezfs %v18,%v16,%v17 /* Compare not equal with zero search. */ - clgrj %r5,%r4,10,.Llastcmp /* If current_len >= n -> last compare */ - vlgvb %r1,%v18,7 /* Get not equal index or 16 if all equal. */ - clrjl %r1,%r0,.Lfound /* Jump away if miscompare is within - loaded bytes; (index < loaded-bytes) */ - j .Lloop - -.Lcmp_one_char: - /* At least one of both strings is not 4-byte aligned - and there is no full character before next block-boundary. - Compare one character to get over the boundary and - proceed with normal loop! */ - vlef %v16,0(%r5,%r2),0 /* Load one character. */ - lghi %r0,4 /* Loaded byte count is 4. */ - vlef %v17,0(%r5,%r3),0 - j .Llt_cmp /* Proceed with comparision. */ - -.Llastcmp: - /* Use comparision result only if located within first n characters. - %r0: loaded byte count in vreg; - %r5: current_len; - %r4: n; - (current_len - n): [0...16[ - First ignored match index: loaded bytes - (current_len-n): ]0...16] - */ - slgr %r5,%r4 /* %r5 = current_len - n. */ - slr %r0,%r5 /* %r0 = first ignored match index. */ - vlgvb %r4,%v18,7 /* Get not equal index or 16 if all equal. */ - clrjl %r4,%r0,.Lfound2 /* Jump away if miscompare is within - loaded bytes and below n bytes. */ -.Lend_equal: - lghi %r2,0 - br %r14 - -.Lfound: - /* Difference or end of string. */ - /* vfenezf found an unequal element or zero. - This instruction compares unsigned words, but wchar_t is signed. - Thus we have to compare the found element again. */ - vlgvb %r4,%v18,7 /* Extract not equal byte-index. */ -.Lfound2: - srl %r4,2 /* And convert it to character-index. */ - vlgvf %r0,%v16,0(%r4) /* Load character-values. */ - vlgvf %r1,%v17,0(%r4) -.Lend_cmp_one_char: - cr %r0,%r1 - je .Lend_equal - lghi %r2,1 - lghi %r1,-1 - locgrl %r2,%r1 - br %r14 -END(__wcsncmp_vx) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ |