;  AMD64 mpn_com_n
;  Version 1.0.4
;
;  Copyright 2008 Jason Moxham

;  Windows Conversion CopyRight 2008 Brian Gladman

;  This file is part of the MPIR Library.
;  The MPIR Library is free software; you can redistribute it and/or modify
;  it under the terms of the GNU Lesser General Public License as published
;  by the Free Software Foundation; either version 2.1 of the License, or (at
;  your option) any later version.
;  The MPIR Library is distributed in the hope that it will be useful, but
;  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
;  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
;  License for more details.
;  You should have received a copy of the GNU Lesser General Public License
;  along with the MPIR Library; see the file COPYING.LIB.  If not, write
;  to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
;  Boston, MA 02110-1301, USA.

;  Calling interface:
;
;  r9[r9] = r8[r9] + 2 * r8[r9]
;
;  void __gmpn_com_n(
;     mp_ptr rp,          rcx
;     mp_srcptr xp,       rdx
;     mp_size_t  n,        r8
;  )
;
;  This is an SEH leaf function (no unwind support needed)

   bits 64
   section .text

   global   __gmpn_com_n

%ifdef DLL
   export   __gmpn_com_n
%endif

__gmpn_com_n:
    mov     r8d, r8d
	sub     r8, 4
	jc      .2

	align   8
.1: mov     rax, [rdx+r8*8+24]
	mov     r9, [rdx+r8*8+16]
	not     rax
	not     r9
	mov     [rcx+r8*8+24], rax
	mov     [rcx+r8*8+16], r9
	mov     rax, [rdx+r8*8+8]
	mov     r9, [rdx+r8*8]
	not     rax
	not     r9
	mov     [rcx+r8*8+8], rax
	mov     [rcx+r8*8], r9
	sub     r8, 4
	jae     .1

.2: add     r8, 4
	jz      .3

; Could still have potential cache-bank conflicts in this tail part

	mov     rax, [rdx+r8*8-8]
	not     rax
	mov     [rcx+r8*8-8], rax
	dec     r8
	jz      .3
	mov     rax, [rdx+r8*8-8]
	not     rax
	mov     [rcx+r8*8-8], rax
	dec     r8
	jz      .3
	mov     rax, [rdx+r8*8-8]
	not     rax
	mov     [rcx+r8*8-8], rax

.3: ret

    end