;  AMD64 mpn_lshift -- mpn left shift
;  Version 1.0.3.
;
;  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:
;
;  AMD64 mpn_lshift -- mpn left shift
;
;  Calling interface:
;
; mp_limb_t mpn_lshift(
;     mp_ptr rcx,       rcx
;     mp_srcptr rdx,    rdx
;     mp_size_t size,    r8
;     unsigned shift     r9
; )
;
;  This is an SEH leaf function (no unwind support needed)

%include "..\yasm_mac.inc"

    BITS 64
    
    LEAF_PROC mpn_lshift
    mov     r8d, r8d
    mov     r9d, r9d
	mov     eax, 64
	sub     rax, r9
	movq    mm0, r9
	sub     r8, 4
	movq    mm1, rax
	movq    mm5, [rdx+r8*8+24]
	movq    mm3, mm5
	psrlq   mm5, mm1
	movq    rax, mm5
	psllq   mm3, mm0
	jbe     .2

	alignb  16, nop
.1: movq    mm2, [rdx+r8*8+16]
	movq    mm4, mm2
	psrlq   mm2, mm1
	por     mm3, mm2
	movq    [rcx+r8*8+24], mm3
	psllq   mm4, mm0
	movq    mm5, [rdx+r8*8+8]
	movq    mm3, mm5
	psrlq   mm5, mm1
	por     mm4, mm5
	movq    [rcx+r8*8+16], mm4
	psllq   mm3, mm0
	movq    mm2, [rdx+r8*8]
	movq    mm4, mm2
	psrlq   mm2, mm1
	por     mm3, mm2
	movq    [rcx+r8*8+8], mm3
	psllq   mm4, mm0
	movq    mm5, [rdx+r8*8-8]
	movq    mm3, mm5
	psrlq   mm5, mm1
	por     mm4, mm5
	movq    [rcx+r8*8], mm4
	psllq   mm3, mm0
	sub     r8, 4
	ja      .1

; r8 is 0,-1,-2,-3 here , so we have 3+r8 limbs to do

.2:	cmp     r8, -1
	jl      .3
	movq    mm2, [rdx+r8*8+16]
	movq    mm4, mm2
	psrlq   mm2, mm1
	por     mm3, mm2
	movq    [rcx+r8*8+24], mm3
	psllq   mm4, mm0
	movq    mm5, [rdx+r8*8+8]
	movq    mm3, mm5
	psrlq   mm5, mm1
	por     mm4, mm5
	movq    [rcx+r8*8+16], mm4
	psllq   mm3, mm0
	sub     r8, 2

.3: test    r8, 1
	jnz     .4
	movq    mm2, [rdx+r8*8+16]
	movq    mm4, mm2
	psrlq   mm2, mm1
	por     mm3, mm2
	movq    [rcx+r8*8+24], mm3
	psllq   mm4, mm0
	movq    [rcx+r8*8+16], mm4
	emms
	ret

.4: movq    [rcx+r8*8+24], mm3
	emms
	ret

    end