dnl  AMD64 mpn_addmul_1 and mpn_submul_1 optimised for Intel Haswell.

dnl  Contributed to the GNU project by Torbjörn Granlund.

dnl  Copyright 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

C AMD K8,K9	n/a

C AMD K10	n/a

C AMD bull	n/a

C AMD pile	n/a

C AMD steam	 ?

C AMD bobcat	n/a

C AMD jaguar	 ?

C Intel P4	n/a

C Intel core	n/a

C Intel NHM	n/a

C Intel SBR	n/a

C Intel IBR	n/a

C Intel HWL	 2.32

C Intel BWL	 ?

C Intel atom	n/a

C VIA nano	n/a

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

C optimisation tool suite written by David Harvey and Torbjörn Granlund.

C TODO

C  * Handle small n separately, for lower overhead.

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

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

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

define(`v0_param',`%rcx')   C r9

define(`n',       `%rbp')

define(`v0',      `%rdx')

ifdef(`OPERATION_addmul_1',`

  define(`ADDSUB',        `add')

  define(`ADCSBB',        `adc')

  define(`func',  `mpn_addmul_1')

')

ifdef(`OPERATION_submul_1',`

  define(`ADDSUB',        `sub')

  define(`ADCSBB',        `sbb')

  define(`func',  `mpn_submul_1')

')

ABI_SUPPORT(DOS64)

ABI_SUPPORT(STD64)

MULFUNC_PROLOGUE(mpn_addmul_1 mpn_submul_1)

ASM_START()

	TEXT

	ALIGN(16)

PROLOGUE(func)

	FUNC_ENTRY(4)

	push	%rbx

	push	%rbp

	push	%r12

	push	%r13

	mov	n_param, n

	mov	v0_param, v0

	test	$1, R8(n)

	jnz	L(bx1)

L(bx0):	shr	$2, n

	jc	L(b10)

L(b00):	mulx(	(up), %r13, %r12)

	mulx(	8,(up), %rbx, %rax)

	add	%r12, %rbx

	adc	$0, %rax

	mov	(rp), %r12

	mov	8(rp), %rcx

	mulx(	16,(up), %r9, %r8)

	lea	-16(rp), rp

	lea	16(up), up

	ADDSUB	%r13, %r12

	jmp	L(lo0)

L(bx1):	shr	$2, n

	jc	L(b11)

L(b01):	mulx(	(up), %r11, %r10)

	jnz	L(gt1)

L(n1):	ADDSUB	%r11, (rp)

	mov	$0, R32(%rax)

	adc	%r10, %rax

	jmp	L(ret)

L(gt1):	mulx(	8,(up), %r13, %r12)

	mulx(	16,(up), %rbx, %rax)

	lea	24(up), up

	add	%r10, %r13

	adc	%r12, %rbx

	adc	$0, %rax

	mov	(rp), %r10

	mov	8(rp), %r12

	mov	16(rp), %rcx

	lea	-8(rp), rp

	ADDSUB	%r11, %r10

	jmp	L(lo1)

L(b11):	mulx(	(up), %rbx, %rax)

	mov	(rp), %rcx

	mulx(	8,(up), %r9, %r8)

	lea	8(up), up

	lea	-24(rp), rp

	inc	n			C adjust n

	ADDSUB	%rbx, %rcx

	jmp	L(lo3)

L(b10):	mulx(	(up), %r9, %r8)

	mulx(	8,(up), %r11, %r10)

	lea	-32(rp), rp

	mov	$0, R32(%rax)

	clc				C clear cf

	jz	L(end)			C depends on old shift

	ALIGN(16)

L(top):	adc	%rax, %r9

	lea	32(rp), rp

	adc	%r8, %r11

	mulx(	16,(up), %r13, %r12)

	mov	(rp), %r8

	mulx(	24,(up), %rbx, %rax)

	lea	32(up), up

	adc	%r10, %r13

	adc	%r12, %rbx

	adc	$0, %rax

	mov	8(rp), %r10

	mov	16(rp), %r12

	ADDSUB	%r9, %r8

	mov	24(rp), %rcx

	mov	%r8, (rp)

	ADCSBB	%r11, %r10

L(lo1):	mulx(	(up), %r9, %r8)

	mov	%r10, 8(rp)

	ADCSBB	%r13, %r12

L(lo0):	mov	%r12, 16(rp)

	ADCSBB	%rbx, %rcx

L(lo3):	mulx(	8,(up), %r11, %r10)

	mov	%rcx, 24(rp)

	dec	n

	jnz	L(top)

L(end):	adc	%rax, %r9

	adc	%r8, %r11

	mov	32(rp), %r8

	mov	%r10, %rax

	adc	$0, %rax

	mov	40(rp), %r10

	ADDSUB	%r9, %r8

	mov	%r8, 32(rp)

	ADCSBB	%r11, %r10

	mov	%r10, 40(rp)

	adc	$0, %rax

L(ret):	pop	%r13

	pop	%r12

	pop	%rbp

	pop	%rbx

	FUNC_EXIT()

	ret

EPILOGUE()

CF_PROT