2012-07-12 11:04:55 +00:00
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/* memcmp - compare two memory blocks. 64 bit S/390 version.
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2014-01-01 11:03:15 +00:00
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Copyright (C) 2012-2014 Free Software Foundation, Inc.
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2012-07-12 11:04:55 +00:00
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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2012-12-08 07:33:24 +00:00
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#include <sysdep.h>
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2012-07-12 11:04:55 +00:00
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#include "asm-syntax.h"
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/* INPUT PARAMETERS
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%r2 = address of first memory area
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%r3 = address of second memory area
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%r4 = number of bytes to compare. */
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.text
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#ifdef USE_MULTIARCH
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ENTRY(memcmp_z900)
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#else
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ENTRY(memcmp)
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#endif
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.machine "z900"
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ltgr %r4,%r4
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je .L_Z900_4
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aghi %r4,-1
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srlg %r1,%r4,8
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ltgr %r1,%r1
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jne .L_Z900_12
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.L_Z900_3:
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larl %r1,.L_Z900_15
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ex %r4,0(%r1)
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.L_Z900_4:
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ipm %r2
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sllg %r2,%r2,34
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srag %r2,%r2,62
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br %r14
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.L_Z900_12:
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clc 0(256,%r3),0(%r2)
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jne .L_Z900_4
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la %r3,256(%r3)
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la %r2,256(%r2)
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brctg %r1,.L_Z900_12
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j .L_Z900_3
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.L_Z900_15:
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clc 0(1,%r3),0(%r2)
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#ifdef USE_MULTIARCH
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END(memcmp_z900)
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#else
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END(memcmp)
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libc_hidden_builtin_def (memcmp)
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weak_alias (memcmp, bcmp)
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#endif
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