dnl PowerPC-32 mpn_sqr_diagonal.
dnl Copyright 2001, 2002 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 by
dnl the Free Software Foundation; either version 2.1 of the License, or (at your
dnl 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; see the file COPYING.LIB. If not, write to
dnl the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
dnl MA 02111-1307, USA.
dnl INPUT PARAMETERS
dnl res_ptr r3
dnl s1_ptr r4
dnl size r5
dnl This runs at 4 cycles/limb on the PPC604. That's saturating the multiply
dnl unit.
include(`../config.m4')
ASM_START()
PROLOGUE(mpn_sqr_diagonal)
lwz r6,0(r4)
mtctr r5
addi r3,r3,-4
bdz L(end1)
lwzu r7,4(r4)
mullw r9,r6,r6
mulhwu r11,r6,r6
bdz L(end2)
lwzu r6,4(r4)
mullw r8,r7,r7
mulhwu r10,r7,r7
bdz L(ende)
L(oop): lwzu r7,4(r4)
stw r9,4(r3)
mullw r9,r6,r6
stwu r11,8(r3)
mulhwu r11,r6,r6
bdz L(endo)
lwzu r6,4(r4)
stw r8,4(r3)
mullw r8,r7,r7
stwu r10,8(r3)
mulhwu r10,r7,r7
bdnz L(oop)
L(ende):
stw r9,4(r3)
mullw r9,r6,r6
stw r11,8(r3)
mulhwu r11,r6,r6
stw r8,12(r3)
stw r10,16(r3)
stw r9,20(r3)
stw r11,24(r3)
blr
L(endo):
stw r8,4(r3)
mullw r8,r7,r7
stw r10,8(r3)
mulhwu r10,r7,r7
stw r9,12(r3)
stw r11,16(r3)
stw r8,20(r3)
stw r10,24(r3)
blr
L(end2):
mullw r8,r7,r7
stw r9,4(r3)
mulhwu r10,r7,r7
stw r11,8(r3)
stw r8,12(r3)
stw r10,16(r3)
blr
L(end1):
mullw r9,r6,r6
mulhwu r11,r6,r6
stw r9,4(r3)
stw r11,8(r3)
blr
EPILOGUE(mpn_sqr_diagonal)