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dnl PowerPC-32 mpn_mul_1 -- Multiply a limb vector with a limb and store the
dnl result in a second limb vector.
dnl Copyright 1995, 1997, 2000, 2002, 2003, 2005 Free Software Foundation,
dnl 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 603e: ?
C 604e: 4.0
C 75x (G3): 4.5-11
C 7400,7410 (G4): 4.5-11
C 744x,745x (G4+): 6.0
C power4/ppc970: 6.0
C power5: 5.63
C INPUT PARAMETERS
C rp r3
C up r4
C n r5
C vl r6
ASM_START()
PROLOGUE(mpn_mul_1)
mtctr r5
addi r3,r3,-4 C adjust res_ptr, it's offset before it's used
li r12,0 C clear upper product reg
addic r0,r0,0 C clear cy
C Start software pipeline
lwz r8,0(r4)
bdz L(end3)
lwzu r9,4(r4)
mullw r11,r8,r6
mulhwu r0,r8,r6
bdz L(end1)
C Software pipelined main loop
L(loop):
lwz r8,4(r4)
mullw r10,r9,r6
adde r5,r11,r12
mulhwu r12,r9,r6
stw r5,4(r3)
bdz L(end2)
lwzu r9,8(r4)
mullw r11,r8,r6
adde r7,r10,r0
mulhwu r0,r8,r6
stwu r7,8(r3)
bdnz L(loop)
C Finish software pipeline
L(end1):
mullw r10,r9,r6
adde r5,r11,r12
mulhwu r12,r9,r6
stw r5,4(r3)
adde r7,r10,r0
stwu r7,8(r3)
addze r3,r12
blr
L(end2):
mullw r11,r8,r6
adde r7,r10,r0
mulhwu r0,r8,r6
stwu r7,8(r3)
adde r5,r11,r12
stw r5,4(r3)
addze r3,r0
blr
L(end3):
mullw r11,r8,r6
stw r11,4(r3)
mulhwu r3,r8,r6
blr
EPILOGUE(mpn_mul_1)
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