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67 lines
1.7 KiB
ArmAsm
67 lines
1.7 KiB
ArmAsm
/* memcmp - compare two memory blocks. 32 bit S/390 version.
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Copyright (C) 2012-2016 Free Software Foundation, Inc.
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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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#include "sysdep.h"
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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_default)
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#else
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ENTRY(memcmp)
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#endif
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.machine "g5"
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basr %r5,0
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.L_G5_16:
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ltr %r4,%r4
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je .L_G5_4
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ahi %r4,-1
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lr %r1,%r4
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srl %r1,8
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ltr %r1,%r1
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jne .L_G5_12
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ex %r4,.L_G5_17-.L_G5_16(%r5)
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.L_G5_4:
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ipm %r2
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sll %r2,2
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sra %r2,30
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br %r14
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.L_G5_12:
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clc 0(256,%r3),0(%r2)
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jne .L_G5_4
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la %r3,256(%r3)
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la %r2,256(%r2)
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brct %r1,.L_G5_12
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ex %r4,.L_G5_17-.L_G5_16(%r5)
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j .L_G5_4
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.L_G5_17:
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clc 0(1,%r3),0(%r2)
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#ifdef USE_MULTIARCH
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END(__memcmp_default)
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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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