2012-07-12 11:04:55 +00:00
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/* Set a block of memory to some byte value. 32 bit S/390 version.
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2013-01-02 19:01:50 +00:00
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Copyright (C) 2012-2013 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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#include "sysdep.h"
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#include "asm-syntax.h"
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/* INPUT PARAMETERS
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%r2 = address of memory area
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%r3 = byte to fill memory with
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%r4 = number of bytes to fill. */
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.text
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#ifndef NOT_IN_libc
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ENTRY(memset_z196)
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.machine "z196"
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2012-09-06 08:28:52 +00:00
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.machinemode "zarch_nohighgprs"
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2012-07-12 11:04:55 +00:00
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llgfr %r4,%r4
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ltgr %r4,%r4
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je .L_Z196_4
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stc %r3,0(%r2)
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lr %r1,%r2
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cghi %r4,1
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je .L_Z196_4
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aghi %r4,-2
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srlg %r5,%r4,8
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ltgr %r5,%r5
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jne .L_Z196_1
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.L_Z196_3:
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exrl %r4,.L_Z196_17
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.L_Z196_4:
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br %r14
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.L_Z196_1:
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cgfi %r5,1048576
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jh memset_mvcle # Switch to mvcle for >256MB
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.L_Z196_2:
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pfd 2,1024(%r1)
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mvc 1(256,%r1),0(%r1)
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aghi %r5,-1
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la %r1,256(%r1)
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jne .L_Z196_2
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j .L_Z196_3
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.L_Z196_17:
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mvc 1(1,%r1),0(%r1)
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END(memset_z196)
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ENTRY(memset_z10)
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.machine "z10"
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2012-09-06 08:28:52 +00:00
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.machinemode "zarch_nohighgprs"
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2012-07-12 11:04:55 +00:00
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llgfr %r4,%r4
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cgije %r4,0,.L_Z10_4
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stc %r3,0(%r2)
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lr %r1,%r2
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cgije %r4,1,.L_Z10_4
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aghi %r4,-2
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srlg %r5,%r4,8
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cgijlh %r5,0,.L_Z10_15
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.L_Z10_3:
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exrl %r4,.L_Z10_18
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.L_Z10_4:
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br %r14
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.L_Z10_15:
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cgfi %r5,163840 # Switch to mvcle for >40MB
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jh memset_mvcle
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.L_Z10_14:
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pfd 2,1024(%r1)
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mvc 1(256,%r1),0(%r1)
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la %r1,256(%r1)
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brctg %r5,.L_Z10_14
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j .L_Z10_3
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.L_Z10_18:
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mvc 1(1,%r1),0(%r1)
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END(memset_z10)
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ENTRY(memset_mvcle)
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ahi %r4,2 # take back the change done by the caller
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lr %r0,%r2 # save source address
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lr %r1,%r3 # move pad byte to R1
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lr %r3,%r4
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sr %r4,%r4 # no source for MVCLE, only a pad byte
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sr %r5,%r5
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.L0: mvcle %r2,%r4,0(%r1) # thats it, MVCLE is your friend
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jo .L0
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lr %r2,%r0 # return value is source address
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.L1:
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br %r14
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END(memset_mvcle)
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#endif
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#include "../memset.S"
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#ifdef NOT_IN_libc
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.globl memset
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.set memset,memset_g5
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#endif
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