dnl  Core 2 mpn_add_err1_n, mpn_sub_err1_n

dnl  Contributed by David Harvey.

dnl  Copyright 2011 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	 ?

C AMD K10	 ?

C Intel P4	 ?

C Intel core2	 4.14

C Intel corei	 ?

C Intel atom	 ?

C VIA nano	 ?

C INPUT PARAMETERS

define(`rp',	`%rdi')

define(`up',	`%rsi')

define(`vp',	`%rdx')

define(`ep',	`%rcx')

define(`yp',	`%r8')

define(`n',	`%r9')

define(`cy_param',	`8(%rsp)')

define(`el',	`%rbx')

define(`eh',	`%rbp')

define(`t0',	`%r10')

define(`t1',	`%r11')

define(`t2',	`%r12')

define(`t3',	`%r13')

define(`w0',	`%r14')

define(`w1',	`%r15')

ifdef(`OPERATION_add_err1_n', `

	define(ADCSBB,	      adc)

	define(func,	      mpn_add_err1_n)')

ifdef(`OPERATION_sub_err1_n', `

	define(ADCSBB,	      sbb)

	define(func,	      mpn_sub_err1_n)')

MULFUNC_PROLOGUE(mpn_add_err1_n mpn_sub_err1_n)

ASM_START()

	TEXT

	ALIGN(16)

PROLOGUE(func)

	mov	cy_param, %rax

	push	%rbx

	push	%rbp

	push	%r12

	push	%r13

	push	%r14

	push	%r15

	lea	(up,n,8), up

	lea	(vp,n,8), vp

	lea	(rp,n,8), rp

	mov	R32(n), R32(%r10)

	and	$3, R32(%r10)

	jz	L(0mod4)

	cmp	$2, R32(%r10)

	jc	L(1mod4)

	jz	L(2mod4)

L(3mod4):

	xor	R32(el), R32(el)

	xor	R32(eh), R32(eh)

	xor	R32(t0), R32(t0)

	xor	R32(t1), R32(t1)

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

	neg	n

	shr	$1, %al		   C restore carry

	mov	(up,n,8), w0

	mov	8(up,n,8), w1

	ADCSBB	(vp,n,8), w0

	mov	w0, (rp,n,8)

	cmovc	16(yp), el

	ADCSBB	8(vp,n,8), w1

	mov	w1, 8(rp,n,8)

	cmovc	8(yp), t0

	mov	16(up,n,8), w0

	ADCSBB	16(vp,n,8), w0

	mov	w0, 16(rp,n,8)

	cmovc	(yp), t1

	setc	%al		   C save carry

	add	t0, el

	adc	$0, eh

	add	t1, el

	adc	$0, eh

	add	$3, n

	jnz	L(loop)

	jmp	L(end)

	ALIGN(16)

L(0mod4):

	xor	R32(el), R32(el)

	xor	R32(eh), R32(eh)

	lea	(yp,n,8), yp

	neg	n

	jmp	L(loop)

	ALIGN(16)

L(1mod4):

	xor	R32(el), R32(el)

	xor	R32(eh), R32(eh)

	lea	-8(yp,n,8), yp

	neg	n

	shr	$1, %al		   C restore carry

	mov	(up,n,8), w0

	ADCSBB	(vp,n,8), w0

	mov	w0, (rp,n,8)

	cmovc	(yp), el

	setc	%al		   C save carry

	add	$1, n

	jnz	L(loop)

	jmp	L(end)

	ALIGN(16)

L(2mod4):

	xor	R32(el), R32(el)

	xor	R32(eh), R32(eh)

	xor	R32(t0), R32(t0)

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

	neg	n

	shr	$1, %al		   C restore carry

	mov	(up,n,8), w0

	mov	8(up,n,8), w1

	ADCSBB	(vp,n,8), w0

	mov	w0, (rp,n,8)

	cmovc	8(yp), el

	ADCSBB	8(vp,n,8), w1

	mov	w1, 8(rp,n,8)

	cmovc	(yp), t0

	setc	%al		   C save carry

	add	t0, el

	adc	$0, eh

	add	$2, n

	jnz	L(loop)

	jmp	L(end)

	ALIGN(32)

L(loop):

	mov	(up,n,8), w0

	shr	$1, %al		   C restore carry

	mov	-8(yp), t0

	mov	$0, R32(t3)

	ADCSBB	(vp,n,8), w0

	cmovnc	t3, t0

	mov	w0, (rp,n,8)

	mov	8(up,n,8), w1

	mov	16(up,n,8), w0

	ADCSBB	8(vp,n,8), w1

	mov	-16(yp), t1

	cmovnc	t3, t1

	mov	-24(yp), t2

	mov	w1, 8(rp,n,8)

	ADCSBB	16(vp,n,8), w0

	cmovnc	t3, t2

	mov	24(up,n,8), w1

	ADCSBB	24(vp,n,8), w1

	cmovc	-32(yp), t3

	setc	%al		   C save carry

	add	t0, el

	adc	$0, eh

	add	t1, el

	adc	$0, eh

	add	t2, el

	adc	$0, eh

	lea	-32(yp), yp

	mov	w0, 16(rp,n,8)

	add	t3, el

	adc	$0, eh

	add	$4, n

	mov	w1, -8(rp,n,8)

	jnz	L(loop)

L(end):

	mov	el, (ep)

	mov	eh, 8(ep)

	pop	%r15

	pop	%r14

	pop	%r13

	pop	%r12

	pop	%rbp

	pop	%rbx

	ret

EPILOGUE()

CF_PROT