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/* CPU specific memcmp implementations. 32 bit S/390 version.
Copyright (C) 2012-2013 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"
.machinemode "zarch_nohighgprs"
ltr %r4,%r4
je .L_Z196_4
ahi %r4,-1
srlk %r1,%r4,8
ltr %r1,%r1
jne .L_Z196_2
.L_Z196_3:
exrl %r4,.L_Z196_14
.L_Z196_4:
ipm %r2
sll %r2,2
sra %r2,30
br %r14
.L_Z196_17:
la %r3,256(%r3)
la %r2,256(%r2)
ahi %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
sll %r2,2
sra %r2,30
br %r14
.L_Z196_14:
clc 0(1,%r3),0(%r2)
END(memcmp_z196)
ENTRY(memcmp_z10)
.machine "z10"
.machinemode "zarch_nohighgprs"
ltr %r4,%r4
je .L_Z10_4
ahi %r4,-1
lr %r1,%r4
srl %r1,8
cijlh %r1,0,.L_Z10_12
.L_Z10_3:
exrl %r4,.L_Z10_15
.L_Z10_4:
ipm %r2
sll %r2,2
sra %r2,30
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)
brct %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_g5
.weak bcmp
.set bcmp,memcmp_g5
#endif
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