diff options
Diffstat (limited to 'sysdeps/s390/s390-64/multiarch/memcmp.S')
-rw-r--r-- | sysdeps/s390/s390-64/multiarch/memcmp.S | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/sysdeps/s390/s390-64/multiarch/memcmp.S b/sysdeps/s390/s390-64/multiarch/memcmp.S new file mode 100644 index 0000000000..f40a3c198e --- /dev/null +++ b/sysdeps/s390/s390-64/multiarch/memcmp.S @@ -0,0 +1,101 @@ +/* CPU specific memcmp implementations. 64 bit S/390 version. + Copyright (C) 2012 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 first memory area + %r3 = address of second memory area + %r4 = number of bytes to compare. */ + + .text + +#ifndef NOT_IN_libc + +ENTRY(memcmp_z196) + .machine "z196" + ltgr %r4,%r4 + je .L_Z196_4 + aghi %r4,-1 + srlg %r1,%r4,8 + ltgr %r1,%r1 + jne .L_Z196_2 +.L_Z196_3: + exrl %r4,.L_Z196_14 +.L_Z196_4: + ipm %r2 + sllg %r2,%r2,34 + srag %r2,%r2,62 + br %r14 +.L_Z196_17: + la %r3,256(%r3) + la %r2,256(%r2) + aghi %r1,-1 + je .L_Z196_3 +.L_Z196_2: + pfd 1,512(%r3) + pfd 1,512(%r2) + clc 0(256,%r3),0(%r2) + je .L_Z196_17 + ipm %r2 + sllg %r2,%r2,34 + srag %r2,%r2,62 + br %r14 +.L_Z196_14: + clc 0(1,%r3),0(%r2) +END(memcmp_z196) + +ENTRY(memcmp_z10) + .machine "z10" + ltgr %r4,%r4 + je .L_Z10_4 + aghi %r4,-1 + srlg %r1,%r4,8 + cgijlh %r1,0,.L_Z10_12 +.L_Z10_3: + exrl %r4,.L_Z10_15 +.L_Z10_4: + ipm %r2 + sllg %r2,%r2,34 + srag %r2,%r2,62 + br %r14 +.L_Z10_12: + pfd 1,512(%r3) + pfd 1,512(%r2) + clc 0(256,%r3),0(%r2) + jne .L_Z10_4 + la %r3,256(%r3) + la %r2,256(%r2) + brctg %r1,.L_Z10_12 + j .L_Z10_3 +.L_Z10_15: + clc 0(1,%r3),0(%r2) +END(memcmp_z10) + +#endif + +#include "../memcmp.S" + +#ifdef NOT_IN_libc +.globl memcmp +.set memcmp,memcmp_z900 +.weak bcmp +.set bcmp,memcmp_z900 +#endif |