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123 lines
3.0 KiB
ArmAsm
123 lines
3.0 KiB
ArmAsm
/* CPU specific memcpy implementations. 64 bit S/390 version.
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Copyright (C) 2012-2017 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 = target operands address
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%r3 = source operands address
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%r4 = number of bytes to copy. */
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.text
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#if defined SHARED && IS_IN (libc)
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ENTRY(____mempcpy_z196)
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.machine "z196"
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lgr %r1,%r2 # Use as dest
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la %r2,0(%r4,%r2) # Return dest + n
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j .L_Z196_start
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END(____mempcpy_z196)
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ENTRY(__memcpy_z196)
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.machine "z196"
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lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
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.L_Z196_start:
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ltgr %r4,%r4
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je .L_Z196_4
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aghi %r4,-1
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srlg %r5,%r4,8
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ltgr %r5,%r5
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jne .L_Z196_5
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.L_Z196_3:
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exrl %r4,.L_Z196_14
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.L_Z196_4:
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br %r14
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.L_Z196_5:
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cgfi %r5,262144 # Switch to mvcle for copies >64MB
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jh __memcpy_mvcle
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.L_Z196_2:
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pfd 1,768(%r3)
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pfd 2,768(%r1)
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mvc 0(256,%r1),0(%r3)
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aghi %r5,-1
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la %r1,256(%r1)
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la %r3,256(%r3)
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jne .L_Z196_2
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j .L_Z196_3
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.L_Z196_14:
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mvc 0(1,%r1),0(%r3)
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END(__memcpy_z196)
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ENTRY(____mempcpy_z10)
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.machine "z10"
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lgr %r1,%r2 # Use as dest
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la %r2,0(%r4,%r2) # Return dest + n
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j .L_Z10_start
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END(____mempcpy_z10)
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ENTRY(__memcpy_z10)
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.machine "z10"
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lgr %r1,%r2 # r1: Use as dest ; r2: Return dest
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.L_Z10_start:
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cgije %r4,0,.L_Z10_4
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aghi %r4,-1
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srlg %r5,%r4,8
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cgijlh %r5,0,.L_Z10_13
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.L_Z10_3:
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exrl %r4,.L_Z10_15
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.L_Z10_4:
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br %r14
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.L_Z10_13:
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cgfi %r5,65535 # Switch to mvcle for copies >16MB
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jh __memcpy_mvcle
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.L_Z10_12:
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pfd 1,768(%r3)
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pfd 2,768(%r1)
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mvc 0(256,%r1),0(%r3)
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la %r1,256(%r1)
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la %r3,256(%r3)
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brctg %r5,.L_Z10_12
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j .L_Z10_3
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.L_Z10_15:
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mvc 0(1,%r1),0(%r3)
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END(__memcpy_z10)
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# define __mempcpy ____mempcpy_default
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#endif /* SHARED && IS_IN (libc) */
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#define memcpy __memcpy_default
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#include "../memcpy.S"
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#undef memcpy
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#if defined SHARED && IS_IN (libc)
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.globl __GI_memcpy
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.set __GI_memcpy,__memcpy_default
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.globl __GI_mempcpy
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.set __GI_mempcpy,____mempcpy_default
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.globl __GI___mempcpy
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.set __GI___mempcpy,____mempcpy_default
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#else
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.globl memcpy
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.set memcpy,__memcpy_default
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.weak mempcpy
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.set mempcpy,__mempcpy
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#endif
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