diff options
Diffstat (limited to 'sysdeps/s390/s390-64/multiarch/memset-s390x.S')
| -rw-r--r-- | sysdeps/s390/s390-64/multiarch/memset-s390x.S | 109 |
1 files changed, 109 insertions, 0 deletions
diff --git a/sysdeps/s390/s390-64/multiarch/memset-s390x.S b/sysdeps/s390/s390-64/multiarch/memset-s390x.S new file mode 100644 index 0000000000..241c128cda --- /dev/null +++ b/sysdeps/s390/s390-64/multiarch/memset-s390x.S @@ -0,0 +1,109 @@ +/* Set a block of memory to some byte value. 64 bit S/390 version. + Copyright (C) 2012-2015 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/>. */ + + +#include "sysdep.h" +#include "asm-syntax.h" + +/* INPUT PARAMETERS + %r2 = address of memory area + %r3 = byte to fill memory with + %r4 = number of bytes to fill. */ + + .text + +#if IS_IN (libc) + +ENTRY(__memset_z196) + .machine "z196" + ltgr %r4,%r4 + je .L_Z196_4 + stc %r3,0(%r2) + lgr %r1,%r2 + cghi %r4,1 + je .L_Z196_4 + aghi %r4,-2 + srlg %r5,%r4,8 + ltgr %r5,%r5 + jne .L_Z196_1 +.L_Z196_3: + exrl %r4,.L_Z196_17 +.L_Z196_4: + br %r14 +.L_Z196_1: + cgfi %r5,1048576 + jh __memset_mvcle # Switch to mvcle for >256MB +.L_Z196_2: + pfd 2,1024(%r1) + mvc 1(256,%r1),0(%r1) + aghi %r5,-1 + la %r1,256(%r1) + jne .L_Z196_2 + j .L_Z196_3 +.L_Z196_17: + mvc 1(1,%r1),0(%r1) +END(__memset_z196) + +ENTRY(__memset_z10) + .machine "z10" + cgije %r4,0,.L_Z10_4 + stc %r3,0(%r2) + lgr %r1,%r2 + cgije %r4,1,.L_Z10_4 + aghi %r4,-2 + srlg %r5,%r4,8 + cgijlh %r5,0,.L_Z10_15 +.L_Z10_3: + exrl %r4,.L_Z10_18 +.L_Z10_4: + br %r14 +.L_Z10_15: + cgfi %r5,163840 # Switch to mvcle for >40MB + jh __memset_mvcle +.L_Z10_14: + pfd 2,1024(%r1) + mvc 1(256,%r1),0(%r1) + la %r1,256(%r1) + brctg %r5,.L_Z10_14 + j .L_Z10_3 +.L_Z10_18: + mvc 1(1,%r1),0(%r1) +END(__memset_z10) + +ENTRY(__memset_mvcle) + aghi %r4,2 # take back the change done by the caller + lgr %r0,%r2 # save source address + lgr %r1,%r3 # move pad byte to R1 + lgr %r3,%r4 # move length to r3 + sgr %r4,%r4 # no source for MVCLE, only a pad byte + sgr %r5,%r5 +.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend + jo .L0 + lgr %r2,%r0 # return value is source address +.L1: + br %r14 +END(__memset_mvcle) + +#endif /* IS_IN (libc) */ + +#include "../memset.S" + +#if !IS_IN (libc) +.globl memset +.set memset,__memset_default +#endif |