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Artifact 5ee05a70ce78bafee26392d2b1c98e448bae9708:


dnl  Intel Pentium-4 mpn_mul_1 -- Multiply a limb vector with a limb and store
dnl  the result in a second limb vector.

dnl  Copyright 2001, 2002 Free Software Foundation, Inc.
dnl 
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
dnl  modify it under the terms of the GNU Lesser General Public License as
dnl  published by the Free Software Foundation; either version 2.1 of the
dnl  License, or (at your option) any later version.
dnl 
dnl  The GNU MP Library is distributed in the hope that it will be useful,
dnl  but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
dnl  Lesser General Public License for more details.
dnl 
dnl  You should have received a copy of the GNU Lesser General Public
dnl  License along with the GNU MP Library; see the file COPYING.LIB.  If
dnl  not, write to the Free Software Foundation, Inc., 59 Temple Place -
dnl  Suite 330, Boston, MA 02111-1307, USA.

include(`../config.m4')


C P4: 4 cycles/limb


C mp_limb_t mpn_mul_1 (mp_ptr dst, mp_srcptr src, mp_size_t size,
C                      mp_limb_t multiplier);
C mp_limb_t mpn_mul_1c (mp_ptr dst, mp_srcptr src, mp_size_t size,
C                       mp_limb_t multiplier, mp_limb_t carry);
C
C Only the carry limb propagation is on the dependent chain, hence 4 c/l.

defframe(PARAM_CARRY,     20)
defframe(PARAM_MULTIPLIER,16)
defframe(PARAM_SIZE,      12)
defframe(PARAM_SRC,       8)
defframe(PARAM_DST,       4)

	TEXT
	ALIGN(16)
PROLOGUE(mpn_mul_1c)
deflit(`FRAME',0)
	movd	PARAM_CARRY, %mm0
	jmp	L(start_1c)
EPILOGUE()

PROLOGUE(mpn_mul_1)
deflit(`FRAME',0)
	pxor	%mm0, %mm0
L(start_1c):
	movl	PARAM_SRC, %eax
	movd	PARAM_MULTIPLIER, %mm7
	movl	PARAM_DST, %edx
	movl	PARAM_SIZE, %ecx

L(top):
	C eax	src, incrementing
	C ebx
	C ecx	counter, size iterations
	C edx	dst, incrementing
	C
	C mm0	carry limb
	C mm7	multiplier

	movd	(%eax), %mm1
	addl	$4, %eax
	pmuludq	%mm7, %mm1

	paddq	%mm1, %mm0
	movd	%mm0, (%edx)
	addl	$4, %edx

	psrlq	$32, %mm0

	subl	$1, %ecx
	jnz	L(top)


	movd	%mm0, %eax
	emms
	ret

EPILOGUE()