;  Core2 mpn_lshift -- mpn left shift
;  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:
;
;  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     r10, rcx
    mov     ecx, r9d
	cmp     r8d, 2
	ja      threeormore
	jz      two

one:mov     rdx, [rdx]
	mov     rax, rdx
	shl     rdx, cl
	neg     rcx
	shr     rax, cl
	mov     [r10], rdx
	ret

two:mov     r8, [rdx]
	mov     r9, [rdx+8]
	mov     r11, r8
	mov     rax, r9
	shl     r8, cl
	shl     r9, cl
	neg     rcx
	shr     r11, cl
	shr     rax, cl
	or      r9, r11
	mov     [r10], r8
	mov     [r10+8], r9
	ret
	
threeormore:
    mov     r8d, r8d    
	mov     eax, 64
	sub     rax, rcx
	movq    xmm0, rcx
	movq    xmm1, rax
	lea     r9, [rdx+r8*8-16]
	mov     r11, r9
	and     r9, -16
	movdqa  xmm3, [r9]
	movdqa  xmm5, xmm3
	psrlq   xmm3, xmm1
	pshufd  xmm3, xmm3, 0x4e
	movq    rax, xmm3
	cmp     r11, r9
	je      .1
	movq    xmm2, [rdx+r8*8-8]
	movq    xmm4, xmm2
	psrlq   xmm2, xmm1
	movq    rax, xmm2
	psllq   xmm4, xmm0
	por     xmm4, xmm3
	movq    [r10+r8*8-8], xmm4
	dec     r8
.1: sub     r8, 5
	jle     .3
	
	alignb  16, nop
.2: movdqa  xmm2, [rdx+r8*8+8]
	movdqa  xmm4, xmm2
	psllq   xmm5, xmm0
	psrlq   xmm2, xmm1
	movhlps xmm3, xmm2
	por     xmm5, xmm3
	movq    [r10+r8*8+24], xmm5
	pshufd  xmm2, xmm2, 0x4e
	movhpd  [r10+r8*8+32], xmm5
	movdqa  xmm3, [rdx+r8*8-8]
	movdqa  xmm5, xmm3
	psrlq   xmm3, xmm1
	movhlps xmm2, xmm3
	psllq   xmm4, xmm0
	pshufd  xmm3, xmm3, 0x4e
	por     xmm4, xmm2
	movq    [r10+r8*8+8], xmm4
	movhpd  [r10+r8*8+16], xmm4
	sub     r8, 4
	jg      .2
.3:	cmp     r8, -1
	je      .42
	jg      .43
	jp      .41

.40:pxor    xmm2, xmm2
	psllq   xmm5, xmm0
	movhlps xmm3, xmm2
	por     xmm5, xmm3
	movq    [r10+r8*8+24], xmm5
	movhpd  [r10+r8*8+32], xmm5
	ret
	
	alignb  16, nop
.43:movdqa  xmm2, [rdx+r8*8+8]
	movdqa  xmm4, xmm2
	psllq   xmm5, xmm0
	psrlq   xmm2, xmm1
	movhlps xmm3, xmm2
	por     xmm5, xmm3
	movq    [r10+r8*8+24], xmm5
	pshufd  xmm2, xmm2, 0x4e
	movhpd  [r10+r8*8+32], xmm5
	movq    xmm3, [rdx+r8*8]
	pshufd  xmm3, xmm3, 0x4e
	movdqa  xmm5, xmm3
	psrlq   xmm3, xmm1
	movhlps xmm2, xmm3
	psllq   xmm4, xmm0
	por     xmm4, xmm2
	movq    [r10+r8*8+8], xmm4
	movhpd  [r10+r8*8+16], xmm4
	psllq   xmm5, xmm0
	movhpd  [r10+r8*8], xmm5
	ret
	
	alignb  16, nop
.42:movdqa  xmm2, [rdx+r8*8+8]
	movdqa  xmm4, xmm2
	psllq   xmm5, xmm0
	psrlq   xmm2, xmm1
	movhlps xmm3, xmm2
	por     xmm5, xmm3
	movq    [r10+r8*8+24], xmm5
	pshufd  xmm2, xmm2, 0x4e
	movhpd  [r10+r8*8+32], xmm5
	pxor    xmm3, xmm3
	movhlps xmm2, xmm3
	psllq   xmm4, xmm0
	por     xmm4, xmm2
	movq    [r10+r8*8+8], xmm4
	movhpd  [r10+r8*8+16], xmm4
	ret
	
	alignb  16, nop
.41:movq    xmm2, [rdx+r8*8+16]
	pshufd  xmm2, xmm2, 0x4e
	movdqa  xmm4, xmm2
	psllq   xmm5, xmm0
	psrlq   xmm2, xmm1
	movhlps xmm3, xmm2
	por     xmm5, xmm3
	movq    [r10+r8*8+24], xmm5
	movhpd  [r10+r8*8+32], xmm5
	psllq   xmm4, xmm0
	movhpd  [r10+r8*8+16], xmm4
	ret
	
	end