| /* memcmp - compare two memory blocks. 64 bit S/390 version. |
| Copyright (C) 2012-2014 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 |
| #ifdef USE_MULTIARCH |
| ENTRY(memcmp_z900) |
| #else |
| ENTRY(memcmp) |
| #endif |
| .machine "z900" |
| ltgr %r4,%r4 |
| je .L_Z900_4 |
| aghi %r4,-1 |
| srlg %r1,%r4,8 |
| ltgr %r1,%r1 |
| jne .L_Z900_12 |
| .L_Z900_3: |
| larl %r1,.L_Z900_15 |
| ex %r4,0(%r1) |
| .L_Z900_4: |
| ipm %r2 |
| sllg %r2,%r2,34 |
| srag %r2,%r2,62 |
| br %r14 |
| .L_Z900_12: |
| clc 0(256,%r3),0(%r2) |
| jne .L_Z900_4 |
| la %r3,256(%r3) |
| la %r2,256(%r2) |
| brctg %r1,.L_Z900_12 |
| j .L_Z900_3 |
| .L_Z900_15: |
| clc 0(1,%r3),0(%r2) |
| #ifdef USE_MULTIARCH |
| END(memcmp_z900) |
| #else |
| END(memcmp) |
| libc_hidden_builtin_def (memcmp) |
| weak_alias (memcmp, bcmp) |
| #endif |
