dnl  AMD64 mpn_addmul_2 optimised for Intel Sandy Bridge.

dnl  Contributed to the GNU project by Torbjörn Granlund.

dnl  Copyright 2003-2005, 2007, 2008, 2011-2013 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	best

C AMD K8,K9

C AMD K10

C AMD bull

C AMD pile

C AMD bobcat

C AMD jaguar

C Intel P4

C Intel core

C Intel NHM

C Intel SBR	 2.93		this

C Intel IBR	 2.66		this

C Intel HWL	 2.5		 2.15

C Intel BWL

C Intel atom

C VIA nano

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

C suite written by David Harvey and Torbjorn Granlund.

C When playing with pointers, set this to $2 to fall back to conservative

C indexing in wind-down code.

define(`I',`$1')

define(`rp',      `%rdi')   C rcx

define(`up',      `%rsi')   C rdx

define(`n_param', `%rdx')   C r8

define(`vp',      `%rcx')   C r9

define(`n',	  `%rcx')

define(`v0',      `%rbx')

define(`v1',      `%rbp')

define(`w0',      `%r8')

define(`w1',      `%r9')

define(`w2',      `%r10')

define(`w3',      `%r11')

define(`X0',      `%r12')

define(`X1',      `%r13')

ABI_SUPPORT(DOS64)

ABI_SUPPORT(STD64)

ASM_START()

	TEXT

	ALIGN(32)

PROLOGUE(mpn_addmul_2)

	FUNC_ENTRY(4)

	push	%rbx

	push	%rbp

	push	%r12

	push	%r13

	mov	(vp), v0

	mov	8(vp), v1

	mov	(up), %rax

	mov	n_param, n

	neg	n

	lea	(up,n_param,8), up

	lea	8(rp,n_param,8), rp

	mul	v0

	test	$1, R8(n)

	jnz	L(bx1)

L(bx0):	mov	-8(rp,n,8), X0

	mov	%rdx, w1

	add	%rax, X0

	adc	$0, w1

	mov	(up,n,8), %rax

	xor	w0, w0

	xor	w3, w3

	test	$2, R8(n)

	jnz	L(b10)

L(b00):	nop				C this nop make loop go faster on SBR!

	mul	v1

	mov	(rp,n,8), X1

	jmp	L(lo0)

L(b10):	lea	-2(n), n

	jmp	L(lo2)

L(bx1):	mov	-8(rp,n,8), X1

	mov	%rdx, w3

	add	%rax, X1

	adc	$0, w3

	mov	(up,n,8), %rax

	xor	w1, w1

	xor	w2, w2

	test	$2, R8(n)

	jz	L(b11)

L(b01):	mov	(rp,n,8), X0

	inc	n

	jmp	L(lo1)

L(b11):	dec	n

	jmp	L(lo3)

	ALIGN(32)

L(top):

L(lo1):	mul	v1

	mov	%rdx, w0		C 1

	add	%rax, X0		C 0

	adc	$0, w0			C 1

	add	w1, X1			C 3

	adc	$0, w3			C 0

	add	w2, X0			C 0

	adc	$0, w0			C 1

	mov	(up,n,8), %rax

	mul	v0

	add	%rax, X0		C 0

	mov	%rdx, w1		C 1

	adc	$0, w1			C 1

	mov	(up,n,8), %rax

	mul	v1

	mov	X1, -16(rp,n,8)		C 3

	mov	(rp,n,8), X1		C 1

	add	w3, X0			C 0

	adc	$0, w1			C 1

L(lo0):	mov	%rdx, w2		C 2

	mov	X0, -8(rp,n,8)		C 0

	add	%rax, X1		C 1

	adc	$0, w2			C 2

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

	add	w0, X1			C 1

	adc	$0, w2			C 2

	mul	v0

	add	%rax, X1		C 1

	mov	%rdx, w3		C 2

	adc	$0, w3			C 2

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

L(lo3):	mul	v1

	add	w1, X1			C 1

	mov	8(rp,n,8), X0		C 2

	adc	$0, w3			C 2

	mov	%rdx, w0		C 3

	add	%rax, X0		C 2

	adc	$0, w0			C 3

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

	mul	v0

	add	w2, X0			C 2

	mov	X1, (rp,n,8)		C 1

	mov	%rdx, w1		C 3

	adc	$0, w0			C 3

	add	%rax, X0		C 2

	adc	$0, w1			C 3

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

	add	w3, X0			C 2

	adc	$0, w1			C 3

L(lo2):	mul	v1

	mov	16(rp,n,8), X1		C 3

	add	%rax, X1		C 3

	mov	%rdx, w2		C 4

	adc	$0, w2			C 4

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

	mov	X0, 8(rp,n,8)		C 2

	mul	v0

	add	w0, X1			C 3

	mov	%rdx, w3		C 4

	adc	$0, w2			C 4

	add	%rax, X1		C 3

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

	mov	24(rp,n,8), X0		C 0	useless but harmless final read

	adc	$0, w3			C 4

	add	$4, n

	jnc	L(top)

L(end):	mul	v1

	add	w1, X1

	adc	$0, w3

	add	w2, %rax

	adc	$0, %rdx

	mov	X1, I(-16(rp),-16(rp,n,8))

	add	w3, %rax

	adc	$0, %rdx

	mov	%rax, I(-8(rp),-8(rp,n,8))

	mov	%rdx, %rax

	pop	%r13

	pop	%r12

	pop	%rbp

	pop	%rbx

	FUNC_EXIT()

	ret

EPILOGUE()

CF_PROT