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dnl PowerPC-64 mpn_copyi.
dnl Copyright 2004, 2005, 2013 Free Software Foundation, Inc.
dnl This file is part of the GNU MP Library.
dnl
dnl The GNU MP Library is free software; you can redistribute it and/or modify
dnl it under the terms of either:
dnl
dnl * the GNU Lesser General Public License as published by the Free
dnl Software Foundation; either version 3 of the License, or (at your
dnl option) any later version.
dnl
dnl or
dnl
dnl * the GNU General Public License as published by the Free Software
dnl Foundation; either version 2 of the License, or (at your option) any
dnl later version.
dnl
dnl or both in parallel, as here.
dnl
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 General Public License
dnl for more details.
dnl
dnl You should have received copies of the GNU General Public License and the
dnl GNU Lesser General Public License along with the GNU MP Library. If not,
dnl see https://www.gnu.org/licenses/.
include(`../config.m4')
C cycles/limb
C POWER3/PPC630 ?
C POWER4/PPC970 ?
C POWER5 ?
C POWER6 1.25
C POWER7 1.09
C INPUT PARAMETERS
define(`rp', `r3')
define(`up', `r4')
define(`n', `r5')
C TODO
C * Try rolling the two loop leading std to the end, allowing the code to
C handle also n = 2.
C * Consider using 4 pointers, schedule ptr update early wrt use.
ASM_START()
PROLOGUE(mpn_copyi)
ifdef(`HAVE_ABI_mode32',
` rldicl n, n, 0,32')
cmpdi cr0, n, 4
blt L(sml)
addi r10, n, 4
srdi r10, r10, 3
mtctr r10
andi. r0, n, 1
rlwinm r11, n, 0,30,30
rlwinm r12, n, 0,29,29
cmpdi cr6, r11, 0
cmpdi cr7, r12, 0
beq cr0, L(xx0)
L(xx1): ld r6, 0(up)
addi up, up, 8
std r6, 0(rp)
addi rp, rp, 8
L(xx0): bne cr6, L(x10)
L(x00): ld r6, 0(up)
ld r7, 8(up)
bne cr7, L(100)
L(000): addi rp, rp, -32
b L(lo0)
L(100): addi up, up, -32
b L(lo4)
L(x10): ld r8, 0(up)
ld r9, 8(up)
bne cr7, L(110)
L(010): addi up, up, 16
addi rp, rp, -16
b L(lo2)
L(110): addi up, up, -16
addi rp, rp, -48
b L(lo6)
L(sml): cmpdi cr0, n, 0
beqlr- cr0
mtctr n
L(t): ld r6, 0(up)
addi up, up, 8
std r6, 0(rp)
addi rp, rp, 8
bdnz L(t)
blr
ALIGN(32)
L(top): std r6, 0(rp)
std r7, 8(rp)
L(lo2): ld r6, 0(up)
ld r7, 8(up)
std r8, 16(rp)
std r9, 24(rp)
L(lo0): ld r8, 16(up)
ld r9, 24(up)
std r6, 32(rp)
std r7, 40(rp)
L(lo6): ld r6, 32(up)
ld r7, 40(up)
std r8, 48(rp)
std r9, 56(rp)
addi rp, rp, 64
L(lo4): ld r8, 48(up)
ld r9, 56(up)
addi up, up, 64
bdnz L(top)
L(end): std r6, 0(rp)
std r7, 8(rp)
std r8, 16(rp)
std r9, 24(rp)
blr
EPILOGUE()
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