dnl  AMD64 mpn_addmul_1 and mpn_submul_1.

dnl  Copyright 2003-2005, 2007, 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	 2.5

C AMD K10	 2.5

C AMD bd1	 5.0

C AMD bobcat	 6.17

C Intel P4	14.9

C Intel core2	 5.09

C Intel NHM	 4.9

C Intel SBR	 4.0

C Intel atom	21.3

C VIA nano	 5.0

C The loop of this code is the result of running a code generation and

C optimization tool suite written by David Harvey and Torbjorn Granlund.

C TODO

C  * The loop is great, but the prologue and epilogue code was quickly written.

C    Tune it!

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

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

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

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

define(`n',       `%r11')

ifdef(`OPERATION_addmul_1',`

      define(`ADDSUB',        `add')

      define(`func',  `mpn_addmul_1')

')

ifdef(`OPERATION_submul_1',`

      define(`ADDSUB',        `sub')

      define(`func',  `mpn_submul_1')

')

ABI_SUPPORT(DOS64)

ABI_SUPPORT(STD64)

MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)

IFDOS(`	define(`up', ``%rsi'')	') dnl

IFDOS(`	define(`rp', ``%rcx'')	') dnl

IFDOS(`	define(`vl', ``%r9'')	') dnl

IFDOS(`	define(`r9', ``rdi'')	') dnl

IFDOS(`	define(`n',  ``%r8'')	') dnl

IFDOS(`	define(`r8', ``r11'')	') dnl

ASM_START()

	TEXT

	ALIGN(16)

PROLOGUE(func)

IFDOS(``push	%rsi		'')

IFDOS(``push	%rdi		'')

IFDOS(``mov	%rdx, %rsi	'')

	mov	(up), %rax		C read first u limb early

	push	%rbx

IFSTD(`	mov	n_param, %rbx   ')	C move away n from rdx, mul uses it

IFDOS(`	mov	n, %rbx         ')

	mul	vl

IFSTD(`	mov	%rbx, n         ')

	and	$3, R32(%rbx)

	jz	L(b0)

	cmp	$2, R32(%rbx)

	jz	L(b2)

	jg	L(b3)

L(b1):	dec	n

	jne	L(gt1)

	ADDSUB	%rax, (rp)

	jmp	L(ret)

L(gt1):	lea	8(up,n,8), up

	lea	-8(rp,n,8), rp

	neg	n

	xor	%r10, %r10

	xor	R32(%rbx), R32(%rbx)

	mov	%rax, %r9

	mov	(up,n,8), %rax

	mov	%rdx, %r8

	jmp	L(L1)

L(b0):	lea	(up,n,8), up

	lea	-16(rp,n,8), rp

	neg	n

	xor	%r10, %r10

	mov	%rax, %r8

	mov	%rdx, %rbx

	jmp	 L(L0)

L(b3):	lea	-8(up,n,8), up

	lea	-24(rp,n,8), rp

	neg	n

	mov	%rax, %rbx

	mov	%rdx, %r10

	jmp	L(L3)

L(b2):	lea	-16(up,n,8), up

	lea	-32(rp,n,8), rp

	neg	n

	xor	%r8, %r8

	xor	R32(%rbx), R32(%rbx)

	mov	%rax, %r10

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

	mov	%rdx, %r9

	jmp	L(L2)

	ALIGN(16)

L(top):	ADDSUB	%r10, (rp,n,8)

	adc	%rax, %r9

	mov	(up,n,8), %rax

	adc	%rdx, %r8

	mov	$0, R32(%r10)

L(L1):	mul	vl

	ADDSUB	%r9, 8(rp,n,8)

	adc	%rax, %r8

	adc	%rdx, %rbx

L(L0):	mov	8(up,n,8), %rax

	mul	vl

	ADDSUB	%r8, 16(rp,n,8)

	adc	%rax, %rbx

	adc	%rdx, %r10

L(L3):	mov	16(up,n,8), %rax

	mul	vl

	ADDSUB	%rbx, 24(rp,n,8)

	mov	$0, R32(%r8)		C zero

	mov	%r8, %rbx		C zero

	adc	%rax, %r10

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

	mov	%r8, %r9		C zero

	adc	%rdx, %r9

L(L2):	mul	vl

	add	$4, n

	js	 L(top)

	ADDSUB	%r10, (rp,n,8)

	adc	%rax, %r9

	adc	%r8, %rdx

	ADDSUB	%r9, 8(rp,n,8)

L(ret):	adc	$0, %rdx

	mov	%rdx, %rax

	pop	%rbx

IFDOS(``pop	%rdi		'')

IFDOS(``pop	%rsi		'')

	ret

EPILOGUE()

CF_PROT