/* Set a block of memory to some byte value.  31/64 bit S/390 version.

   Copyright (C) 2012-2018 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 memory area

     %r3 = byte to fill memory with

     %r4 = number of bytes to fill.  */

       .text

#if IS_IN (libc)

ENTRY(__memset_z196)

	.machine "z196"

	.machinemode "zarch_nohighgprs"

# if !defined __s390x__

	llgfr	%r4,%r4

# endif /* !defined __s390x__  */

	ltgr    %r4,%r4

	je      .L_Z196_4

	stc     %r3,0(%r2)

	lgr     %r1,%r2

	cghi    %r4,1

	je      .L_Z196_4

	aghi    %r4,-2

	srlg    %r5,%r4,8

	ltgr    %r5,%r5

	jne     .L_Z196_1

.L_Z196_3:

	exrl    %r4,.L_Z196_17

.L_Z196_4:

	br      %r14

.L_Z196_1:

	cgfi	%r5,1048576

	jh	__memset_mvcle	   # Switch to mvcle for >256MB

.L_Z196_2:

	pfd     2,1024(%r1)

	mvc     1(256,%r1),0(%r1)

	aghi    %r5,-1

	la      %r1,256(%r1)

	jne     .L_Z196_2

	j       .L_Z196_3

.L_Z196_17:

	mvc     1(1,%r1),0(%r1)

END(__memset_z196)

ENTRY(__memset_z10)

	.machine "z10"

	.machinemode "zarch_nohighgprs"

# if !defined __s390x__

	llgfr	%r4,%r4

# endif /* !defined __s390x__  */

	cgije   %r4,0,.L_Z10_4

	stc     %r3,0(%r2)

	lgr     %r1,%r2

	cgije   %r4,1,.L_Z10_4

	aghi    %r4,-2

	srlg    %r5,%r4,8

	cgijlh  %r5,0,.L_Z10_15

.L_Z10_3:

	exrl    %r4,.L_Z10_18

.L_Z10_4:

	br      %r14

.L_Z10_15:

	cgfi	%r5,163840          # Switch to mvcle for >40MB

	jh	__memset_mvcle

.L_Z10_14:

	pfd     2,1024(%r1)

	mvc     1(256,%r1),0(%r1)

	la      %r1,256(%r1)

	brctg   %r5,.L_Z10_14

	j       .L_Z10_3

.L_Z10_18:

	mvc     1(1,%r1),0(%r1)

END(__memset_z10)

ENTRY(__memset_mvcle)

	aghi	%r4,2               # take back the change done by the caller

	lgr	%r0,%r2		    # save source address

	lgr	%r1,%r3		    # move pad byte to R1

	lgr	%r3,%r4             # move length to r3

	sgr	%r4,%r4		    # no source for MVCLE, only a pad byte

	sgr	%r5,%r5

.L0:	mvcle	%r2,%r4,0(%r1)	    # thats it, MVCLE is your friend

	jo	.L0

	lgr	%r2,%r0		    # return value is source address

.L1:

	br	%r14

END(__memset_mvcle)

#endif /* IS_IN (libc) */

#include "../memset.S"

#if !IS_IN (libc)

.globl   memset

.set     memset,__memset_default

#elif defined SHARED && IS_IN (libc)

.globl   __GI_memset

.set     __GI_memset,__memset_default

#endif