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Diffstat (limited to 'sysdeps/s390/multiarch/wcpncpy-vx.S')
| -rw-r--r-- | sysdeps/s390/multiarch/wcpncpy-vx.S | 222 |
1 files changed, 0 insertions, 222 deletions
diff --git a/sysdeps/s390/multiarch/wcpncpy-vx.S b/sysdeps/s390/multiarch/wcpncpy-vx.S deleted file mode 100644 index 6a1b587f0e..0000000000 --- a/sysdeps/s390/multiarch/wcpncpy-vx.S +++ /dev/null @@ -1,222 +0,0 @@ -/* Vector optimized 32/64 bit S/390 version of wcpncpy. - 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 - -/* wchar_t * wcpncpy (wchar_t *dest, const wchar_t *src, size_t n) - Copies at most n characters of string src to dest - returning a pointer to its end or dest+n - if src is smaller than n. - - Register usage: - -%r0 = return value - -%r1 = zero byte index - -%r2 = curr dst pointer - -%r3 = curr src pointer - -%r4 = n - -%r5 = current_len - -%r6 = loaded bytes - -%r7 = border, tmp -*/ -ENTRY(__wcpncpy_vx) - .machine "z13" - .machinemode "zarch_nohighgprs" - -# if !defined __s390x__ - llgfr %r4,%r4 -# endif /* !defined __s390x__ */ - - clgfi %r4,0 - ber %r14 /* Nothing to do, if n == 0. */ - - vlbb %v16,0(%r3),6 /* Load s until next 4k-byte boundary. */ - - tmll %r3,3 /* Test if s is 4-byte aligned? */ - jne .Lfallback /* And use common-code variant if not. */ - - vlvgp %v31,%r6,%r7 /* Save registers. */ - lghi %r5,0 /* current_len = 0. */ - - lcbb %r6,0(%r3),6 /* Get bytes to 4k-byte boundary or 16. */ - llgfr %r6,%r6 /* Convert 32bit to 64bit. */ - - /* Check range of maxlen 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. */ - - la %r0,0(%r4,%r2) /* Save destination pointer + n for return. */ - - clgrjle %r4,%r6,.Lremaining_v16 /* If n <= loaded-bytes - -> process remaining. */ - - /* n > loaded-byte-count */ - vfenezf %v17,%v16,%v16 /* Find element not equal with zero search. */ - vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */ - aghi %r1,3 /* Also copy remaining bytes of zero. */ - clrjl %r1,%r6,.Lfound_v16_store /* Found zero within loaded bytes, - copy and return. */ - - /* Align s to 16 byte. */ - risbgn %r7,%r3,60,128+63,0 /* %r3 = bits 60-63 of %r2 'and' 15. */ - lghi %r5,15 /* current_len = 15. */ - slr %r5,%r7 /* Compute highest index to 16byte boundary. */ - - /* Zero not found and n > loaded-byte-count. */ - vstl %v16,%r5,0(%r2) /* Copy loaded characters - no zero. */ - ahi %r5,1 /* Start loop at next character. */ - - /* Now we are 16byte aligned, so we can load a full vreg - without page fault. */ - lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */ - aghi %r1,64 - clgrjl %r1,%r4,.Lloop64 - - vl %v16,0(%r5,%r3) /* Load s. */ - clgijl %r4,17,.Lremaining_v16 /* If n <=16, - process remaining bytes. */ -.Llt64: - lgr %r7,%r4 - slgfi %r7,16 /* border_len = n - 16. */ - - clgrjhe %r5,%r7,.Lremaining_v16 /* If current_len >= border - then process remaining bytes. */ - vfenezfs %v17,%v16,%v16 /* Find element not equal with zero search. */ - je .Lfound_v16 /* Jump away if zero was found. */ - vl %v18,16(%r5,%r3) /* Load next part of s. */ - vst %v16,0(%r5,%r2) /* Store previous part without zero to dst. */ - aghi %r5,16 - - clgrjhe %r5,%r7,.Lremaining_v18 - vfenezfs %v17,%v18,%v18 - je .Lfound_v18 - vl %v16,16(%r5,%r3) - vst %v18,0(%r5,%r2) - aghi %r5,16 - - clgrjhe %r5,%r7,.Lremaining_v16 - vfenezfs %v17,%v16,%v16 - je .Lfound_v16 - vl %v18,16(%r5,%r3) - vst %v16,0(%r5,%r2) - aghi %r5,16 - -.Lremaining_v18: - vlr %v16,%v18 -.Lremaining_v16: - /* v16 contains the remaining bytes [1...16]. - Store remaining bytes and append string-termination. */ - vfenezf %v17,%v16,%v16 /* Find element not equal with zero search. */ - slgrk %r7,%r4,%r5 /* Remaining bytes = maxlen - current_len */ - aghi %r7,-1 /* vstl needs highest index. */ - la %r2,0(%r5,%r2) /* vstl has no index register. */ - vlgvb %r1,%v17,7 /* Load zero index or 16 if not found. */ - aghi %r1,3 /* Also copy remaining bytes of zero. */ - /* Zero in remaining bytes? -> jump away (zero-index <= max-index). */ - clrjle %r1,%r7,.Lfound_v16_store - vstl %v16,%r7,0(%r2) /* Store remaining bytes without null - termination! */ -.Lend: - /* Restore saved registers. */ - vlgvg %r6,%v31,0 - vlgvg %r7,%v31,1 - lgr %r2,%r0 /* Load saved dest-ptr. */ - br %r14 - -.Lfound_v16_32: - aghi %r5,32 - j .Lfound_v16 -.Lfound_v18_48: - aghi %r5,32 -.Lfound_v18_16: - aghi %r5,16 -.Lfound_v18: - vlr %v16,%v18 -.Lfound_v16: - /* v16 contains a zero. Store remaining bytes to zero. current_len - has not reached border, thus checking for n is not needed! */ - vlgvb %r1,%v17,7 /* Load byte index of zero. */ - la %r2,0(%r5,%r2) /* vstl has no support for index-register. */ - aghi %r1,3 /* Also copy remaining bytes of zero. */ -.Lfound_v16_store: - vstl %v16,%r1,0(%r2) /* Copy characters including zero. */ - /* Fill remaining bytes with zero - remaining byte count always > 0. */ - algr %r5,%r1 /* Remaining bytes (=%r4) = ... */ - slgr %r4,%r5 /* = n - (currlen + zero_index + 1) */ - la %r2,0(%r1,%r2) /* Pointer to zero. start filling beyond. */ - lay %r0,-3(%r2) /* Save return-pointer to found zero. */ - clgije %r4,1,.Lend /* Skip zero-filling, if found-zero is last - possible character. - (1 is substracted from r4 below!). */ - aghi %r4,-2 /* mvc with exrl needs count - 1. - (additional -1, see remaining bytes above) */ - srlg %r6,%r4,8 /* Split into 256 byte blocks. */ - ltgr %r6,%r6 - je .Lzero_lt256 -.Lzero_loop256: - mvc 1(256,%r2),0(%r2) /* Fill 256 zeros at once. */ - la %r2,256(%r2) - brctg %r6,.Lzero_loop256 /* Loop until all blocks are processed. */ -.Lzero_lt256: - exrl %r4,.Lmvc_lt256 - j .Lend -.Lmvc_lt256: - mvc 1(1,%r2),0(%r2) - - /* Find zero in 16byte aligned loop. */ -.Lloop64: - vl %v16,0(%r5,%r3) - vfenezfs %v17,%v16,%v16 /* Find element not equal with zero search. */ - je .Lfound_v16 /* Jump away if zero was found. */ - vl %v18,16(%r5,%r3) /* Load next part of s. */ - vst %v16,0(%r5,%r2) /* Store previous part without zero to dst. */ - vfenezfs %v17,%v18,%v18 - je .Lfound_v18_16 - vl %v16,32(%r5,%r3) - vst %v18,16(%r5,%r2) - vfenezfs %v17,%v16,%v16 - je .Lfound_v16_32 - vl %v18,48(%r5,%r3) - vst %v16,32(%r5,%r2) - vfenezfs %v17,%v18,%v18 - je .Lfound_v18_48 - vst %v18,48(%r5,%r2) - - aghi %r5,64 - lgr %r1,%r5 /* If %r5 + 64 < maxlen? -> loop64. */ - aghi %r1,64 - clgrjl %r1,%r4,.Lloop64 - - vl %v16,0(%r5,%r3) /* Load s. */ - j .Llt64 - -.Lfallback: - jg __wcpncpy_c -END(__wcpncpy_vx) -#endif /* HAVE_S390_VX_ASM_SUPPORT && IS_IN (libc) */ |