gcc/gmp/mpn/powerpc32/mul_1.asm

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)