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dnl PowerPC-64 mpn_copyd
dnl Copyright 2004, 2005 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU Lesser General Public License as published
dnl by the Free Software Foundation; either version 3 of the License, or (at
dnl your option) any later version.
dnl The GNU MP Library is distributed in the hope that it will be useful, but
dnl WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
dnl or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
dnl License for more details.
dnl You should have received a copy of the GNU Lesser General Public License
dnl along with the GNU MP Library. If not, see http://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C POWER3/PPC630 1
C POWER4/PPC970 1
C POWER5 ?
C POWER6 ?
C POWER7 1.4
C INPUT PARAMETERS
C rp r3
C up r4
C n r5
ASM_START()
PROLOGUE(mpn_copyd)
rldic. r0, r5, 3, 59 C r0 = (r5 & 3) << 3; cr0 = (n == 4t)?
cmpldi cr6, r0, 16 C cr6 = (n cmp 4t + 2)?
ifdef(`HAVE_ABI_mode32',
` rldic r6, r5, 3, 32', C byte count corresponding to n
` rldicr r6, r5, 3, 60') C byte count corresponding to n
addi r5, r5, 4 C compute...
ifdef(`HAVE_ABI_mode32',
` rldicl r5, r5, 62,34', C ...branch count
` rldicl r5, r5, 62, 2') C ...branch count
mtctr r5
add r4, r4, r6
add r3, r3, r6
sub r4, r4, r0 C offset up
sub r3, r3, r0 C offset rp
beq cr0, L(L00)
blt cr6, L(L01)
beq cr6, L(L10)
b L(L11)
ALIGN(16)
L(oop): ld r6, 24(r4)
std r6, 24(r3)
L(L11): ld r6, 16(r4)
std r6, 16(r3)
L(L10): ld r6, 8(r4)
std r6, 8(r3)
L(L01): ld r6, 0(r4)
std r6, 0(r3)
L(L00): addi r4, r4, -32
addi r3, r3, -32
bdnz L(oop)
blr
EPILOGUE()
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