diff options
Diffstat (limited to 'sysdeps/s390/s390-32/strncpy.S')
| -rw-r--r-- | sysdeps/s390/s390-32/strncpy.S | 79 |
1 files changed, 0 insertions, 79 deletions
diff --git a/sysdeps/s390/s390-32/strncpy.S b/sysdeps/s390/s390-32/strncpy.S deleted file mode 100644 index c642bce90d..0000000000 --- a/sysdeps/s390/s390-32/strncpy.S +++ /dev/null @@ -1,79 +0,0 @@ -/* strncpy - copy at most n characters from a string from source to - destination. For IBM S390 - This file is part of the GNU C Library. - Copyright (C) 2000-2017 Free Software Foundation, Inc. - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). - - 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/>. */ - -/* - * R2 = address of destination (dst) - * R3 = address of source (src) - * R4 = max of bytes to copy - */ - -#include "sysdep.h" -#include "asm-syntax.h" - -ENTRY(strncpy) - .text - st %r2,24(%r15) # save dst pointer - slr %r2,%r3 # %r3 points to src, %r2+%r3 to dst - lhi %r1,3 - nr %r1,%r4 # last 2 bits of # bytes - srl %r4,2 - ltr %r4,%r4 # less than 4 bytes to copy ? - jz .L1 - bras %r5,.L0 # enter loop & load address of a 0 - .long 0 -.L0: icm %r0,8,0(%r3) # first byte - jz .L3 - icm %r0,4,1(%r3) # second byte - jz .L4 - icm %r0,2,2(%r3) # third byte - jz .L5 - icm %r0,1,3(%r3) # fourth byte - jz .L6 - st %r0,0(%r2,%r3) # store all four to dest. - la %r3,4(%r3) - brct %r4,.L0 -.L1: ltr %r1,%r1 - jz .Lexit -.L2: icm %r0,1,0(%r3) - stc %r0,0(%r2,%r3) - la %r3,1(%r3) - jz .L7 - brct %r1,.L2 - j .Lexit -.L3: icm %r0,4,0(%r5) -.L4: icm %r0,2,0(%r5) -.L5: icm %r0,1,0(%r5) -.L6: st %r0,0(%r2,%r3) - la %r3,4(%r3) - ahi %r4,-1 - j .L8 -.L7: ahi %r1,-1 -.L8: sll %r4,2 - alr %r4,%r1 - alr %r2,%r3 # start of dst area to be zeroed - lr %r3,%r4 - slr %r4,%r4 - slr %r5,%r5 -.L9: mvcle %r2,%r4,0 # pad dst with zeroes - jo .L9 -.Lexit: l %r2,24(%r15) # return dst pointer - br %r14 -END(strncpy) -libc_hidden_builtin_def (strncpy) |