dnl  AMD64 mpn_add_n, mpn_sub_n optimised for bobcat.

dnl  Copyright 2003-2005, 2007, 2008, 2010-2013 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

C AMD K10

C AMD bd1

C AMD bobcat	 2.28

C Intel P4

C Intel core2

C Intel NHM

C Intel SBR

C Intel IBR

C Intel atom

C VIA nano

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 INPUT PARAMETERS

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

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

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

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

define(`cy',	`%r8')	C rsp+40    (mpn_add_nc and mpn_sub_nc)

ifdef(`OPERATION_add_n', `

	define(ADCSBB,	      adc)

	define(func,	      mpn_add_n)

	define(func_nc,	      mpn_add_nc)')

ifdef(`OPERATION_sub_n', `

	define(ADCSBB,	      sbb)

	define(func,	      mpn_sub_n)

	define(func_nc,	      mpn_sub_nc)')

MULFUNC_PROLOGUE(mpn_add_n mpn_add_nc mpn_sub_n mpn_sub_nc)

ABI_SUPPORT(DOS64)

ABI_SUPPORT(STD64)

ASM_START()

	TEXT

	ALIGN(16)

PROLOGUE(func)

	FUNC_ENTRY(4)

	xor	%r8, %r8

L(ent):	test	$1, R8(n)

	jnz	L(bx1)

L(bx0):	test	$2, R8(n)

	jnz	L(b10)

L(b00):	shr	$2, n

	neg	%r8

	mov	$3, R32(%rax)

	mov	(up), %r10

	mov	8(up), %r11

	jmp	L(lo0)

L(b10):	shr	$2, n

	neg	%r8

	mov	$1, R32(%rax)

	mov	(up), %r8

	mov	8(up), %r9

	jrcxz	L(cj2)

	jmp	L(top)

L(bx1):	test	$2, R8(n)

	jnz	L(b11)

L(b01):	shr	$2, n

	neg	%r8

	mov	$0, R32(%rax)

	mov	(up), %r9

	jrcxz	L(cj1)

	mov	8(up), %r10

	jmp	L(lo1)

	ALIGN(8)

L(b11):	inc	n

	shr	$2, n

	neg	%r8

	mov	$2, R32(%rax)

	mov	(up), %r11

	jmp	L(lo3)

	ALIGN(4)

L(top):	mov	8(up,%rax,8), %r10

	ADCSBB	-8(vp,%rax,8), %r8

	mov	%r8, -8(rp,%rax,8)

L(lo1):	mov	16(up,%rax,8), %r11

	ADCSBB	(vp,%rax,8), %r9

	lea	4(%rax), %rax

	mov	%r9, -32(rp,%rax,8)

L(lo0):	ADCSBB	-24(vp,%rax,8), %r10

	mov	%r10, -24(rp,%rax,8)

L(lo3):	ADCSBB	-16(vp,%rax,8), %r11

	dec	n

	mov	-8(up,%rax,8), %r8

	mov	%r11, -16(rp,%rax,8)

L(lo2):	mov	(up,%rax,8), %r9

	jnz	L(top)

L(cj2):	ADCSBB	-8(vp,%rax,8), %r8

	mov	%r8, -8(rp,%rax,8)

L(cj1):	ADCSBB	(vp,%rax,8), %r9

	mov	%r9, (rp,%rax,8)

	mov	$0, R32(%rax)

	adc	$0, R32(%rax)

	FUNC_EXIT()

	ret

EPILOGUE()

	ALIGN(16)

PROLOGUE(func_nc)

	FUNC_ENTRY(4)

IFDOS(`	mov	56(%rsp), %r8	')

	jmp	L(ent)

EPILOGUE()

CF_PROT