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[thirdparty/glibc.git] / sysdeps / s390 / s390-32 / multiarch / memcpy.S

/* CPU specific memcpy implementations.  32 bit S/390 version.
   Copyright (C) 2012-2015 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 = target operands address
     %r3 = source operands address
     %r4 = number of bytes to copy.  */

       .text

#if defined SHARED && IS_IN (libc)

ENTRY(memcpy_z196)
	.machine "z196"
	.machinemode "zarch_nohighgprs"
        llgfr   %r4,%r4
        ltgr    %r4,%r4
        je      .L_Z196_4
        aghi    %r4,-1
        lr      %r1,%r2
        srlg    %r5,%r4,8
        ltgr    %r5,%r5
        jne     .L_Z196_5
.L_Z196_3:
        exrl    %r4,.L_Z196_14
.L_Z196_4:
        br      %r14
.L_Z196_5:
        cgfi    %r5,262144      # Switch to mvcle for copies >64MB
        jh      memcpy_mvcle
.L_Z196_2:
        pfd     1,768(%r3)
        pfd     2,768(%r1)
        mvc     0(256,%r1),0(%r3)
        aghi    %r5,-1
        la      %r1,256(%r1)
        la      %r3,256(%r3)
        jne     .L_Z196_2
        j       .L_Z196_3
.L_Z196_14:
        mvc     0(1,%r1),0(%r3)
END(memcpy_z196)

ENTRY(memcpy_z10)
	.machine "z10"
	.machinemode "zarch_nohighgprs"
        llgfr   %r4,%r4
        cgije   %r4,0,.L_Z10_4
        aghi    %r4,-1
        lr      %r1,%r2
        srlg    %r5,%r4,8
        cgijlh  %r5,0,.L_Z10_13
.L_Z10_3:
        exrl    %r4,.L_Z10_15
.L_Z10_4:
        br      %r14
.L_Z10_13:
        cgfi    %r5,65535	# Switch to mvcle for copies >16MB
        jh      memcpy_mvcle
.L_Z10_12:
        pfd     1,768(%r3)
        pfd     2,768(%r1)
        mvc     0(256,%r1),0(%r3)
        la      %r1,256(%r1)
        la      %r3,256(%r3)
        brctg   %r5,.L_Z10_12
        j       .L_Z10_3
.L_Z10_15:
        mvc     0(1,%r1),0(%r3)
END(memcpy_z10)

#endif

#include "../memcpy.S"

#if !defined SHARED || !IS_IN (libc)
.globl   memcpy
.set     memcpy,memcpy_g5
#endif