dnl  AMD64 mpn_mul_2 -- Multiply an n-limb vector with a 2-limb vector and

dnl  store the result in a third limb vector.

dnl  Copyright 2008, 2011, 2012 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 AMD K8,K9	 2.275

C AMD K10	 2.275

C Intel P4	13.5

C Intel core2	 4.0

C Intel corei	 3.8

C Intel atom	 ?

C VIA nano	 ?

C This code is the result of running a code generation and optimization tool

C suite written by David Harvey and Torbjorn Granlund.

C TODO

C  * Work on feed-in and wind-down code.

C  * Convert "mov $0" to "xor".

C  * Adjust initial lea to save some bytes.

C  * Perhaps adjust n from n_param&3 value?

C  * Replace with 2.25 c/l sequence.

C INPUT PARAMETERS

define(`rp',	 `%rdi')

define(`up',	 `%rsi')

define(`n_param',`%rdx')

define(`vp',	 `%rcx')

define(`v0', `%r8')

define(`v1', `%r9')

define(`w0', `%rbx')

define(`w1', `%rcx')

define(`w2', `%rbp')

define(`w3', `%r10')

define(`n',  `%r11')

ABI_SUPPORT(DOS64)

ABI_SUPPORT(STD64)

ASM_START()

	TEXT

	ALIGN(16)

PROLOGUE(mpn_mul_2)

	FUNC_ENTRY(4)

	push	%rbx

	push	%rbp

	mov	(vp), v0

	mov	8(vp), v1

	mov	(up), %rax

	mov	n_param, n

	neg	n

	lea	-8(up,n_param,8), up

	lea	-8(rp,n_param,8), rp

	and	$3, R32(n_param)

	jz	L(m2p0)

	cmp	$2, R32(n_param)

	jc	L(m2p1)

	jz	L(m2p2)

L(m2p3):

	mul	v0

	xor	R32(w3), R32(w3)

	mov	%rax, w1

	mov	%rdx, w2

	mov	8(up,n,8), %rax

	add	$-1, n

	mul	v1

	add	%rax, w2

	jmp	L(m23)

L(m2p0):

	mul	v0

	xor	R32(w2), R32(w2)

	mov	%rax, w0

	mov	%rdx, w1

	jmp	L(m20)

L(m2p1):

	mul	v0

	xor	R32(w3), R32(w3)

	xor	R32(w0), R32(w0)

	xor	R32(w1), R32(w1)

	add	$1, n

	jmp	L(m2top)

L(m2p2):

	mul	v0

	xor	R32(w0), R32(w0)

	xor	R32(w1), R32(w1)

	mov	%rax, w2

	mov	%rdx, w3

	mov	8(up,n,8), %rax

	add	$-2, n

	jmp	L(m22)

	ALIGN(32)

L(m2top):

	add	%rax, w3

	adc	%rdx, w0

	mov	0(up,n,8), %rax

	adc	$0, R32(w1)

	mov	$0, R32(w2)

	mul	v1

	add	%rax, w0

	mov	w3, 0(rp,n,8)

	adc	%rdx, w1

	mov	8(up,n,8), %rax

	mul	v0

	add	%rax, w0

	adc	%rdx, w1

	adc	$0, R32(w2)

L(m20):	mov	8(up,n,8), %rax

	mul	v1

	add	%rax, w1

	adc	%rdx, w2

	mov	16(up,n,8), %rax

	mov	$0, R32(w3)

	mul	v0

	add	%rax, w1

	mov	16(up,n,8), %rax

	adc	%rdx, w2

	adc	$0, R32(w3)

	mul	v1

	add	%rax, w2

	mov	w0, 8(rp,n,8)

L(m23):	adc	%rdx, w3

	mov	24(up,n,8), %rax

	mul	v0

	mov	$0, R32(w0)

	add	%rax, w2

	adc	%rdx, w3

	mov	w1, 16(rp,n,8)

	mov	24(up,n,8), %rax

	mov	$0, R32(w1)

	adc	$0, R32(w0)

L(m22):	mul	v1

	add	%rax, w3

	mov	w2, 24(rp,n,8)

	adc	%rdx, w0

	mov	32(up,n,8), %rax

	mul	v0

	add	$4, n

	js	L(m2top)

	add	%rax, w3

	adc	%rdx, w0

	adc	$0, R32(w1)

	mov	(up), %rax

	mul	v1

	mov	w3, (rp)

	add	%rax, w0

	adc	%rdx, w1

	mov	w0, 8(rp)

	mov	w1, %rax

	pop	%rbp

	pop	%rbx

	FUNC_EXIT()

	ret

EPILOGUE()

CF_PROT