dnl  AMD64 SSE mpn_sec_tabselect.

dnl  Contributed to the GNU project by Torbjörn Granlund.

dnl  Copyright 2011-2013 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     cycles/limb     cycles/limb

C	      ali,evn n	     unal,evn n	      other cases

C AMD K8,K9	 1.65		1.65		 1.8

C AMD K10	 0.78		0.78		 0.85

C AMD bd1	 0.80		0.91		 1.25

C AMD bobcat	 2.15		2.15		 2.37

C Intel P4	 2.5		2.5		 2.95

C Intel core2	 1.17		1.25		 1.25

C Intel NHM	 0.87		0.90		 0.90

C Intel SBR	 0.63		0.79		 0.77

C Intel atom	 4.3		 4.3		 4.3	slower than plain code

C VIA nano	 1.4		 5.1		 3.14	too alignment dependent

C NOTES

C  * We only honour the least significant 32 bits of the `which' and `nents'

C    arguments to allow efficient code using just SSE2.  We would need to

C    either use the SSE4_1 pcmpeqq, or find some other SSE2 sequence.

C  * We use movd for copying between xmm and plain registers, since old gas

C    rejects movq.  But gas assembles movd as movq when given a 64-bit greg.

define(`rp',     `%rdi')

define(`tp',     `%rsi')

define(`n',      `%rdx')

define(`nents',  `%rcx')

define(`which',  `%r8')

define(`i',      `%r10')

define(`j',      `%r9')

C rax  rbx  rcx  rdx  rdi  rsi  rbp   r8   r9  r10  r11  r12  r13  r14  r15

C          nents  n   rp   tab       which j    i   temp  *    *    *    *

ABI_SUPPORT(DOS64)

ABI_SUPPORT(STD64)

ASM_START()

	TEXT

	ALIGN(16)

PROLOGUE(mpn_sec_tabselect)

	FUNC_ENTRY(4)

IFDOS(`	mov	56(%rsp), %r8d	')

	movd	which, %xmm8

	pshufd	$0, %xmm8, %xmm8	C 4 `which' copies

	mov	$1, R32(%rax)

	movd	%rax, %xmm9

	pshufd	$0, %xmm9, %xmm9	C 4 copies of 1

	mov	n, j

	add	$-8, j

	js	L(outer_end)

L(outer_top):

	mov	nents, i

	mov	tp, %r11

	pxor	%xmm13, %xmm13

	pxor	%xmm4, %xmm4

	pxor	%xmm5, %xmm5

	pxor	%xmm6, %xmm6

	pxor	%xmm7, %xmm7

	ALIGN(16)

L(top):	movdqa	%xmm8, %xmm0

	pcmpeqd	%xmm13, %xmm0

	paddd	%xmm9, %xmm13

	movdqu	0(tp), %xmm2

	movdqu	16(tp), %xmm3

	pand	%xmm0, %xmm2

	pand	%xmm0, %xmm3

	por	%xmm2, %xmm4

	por	%xmm3, %xmm5

	movdqu	32(tp), %xmm2

	movdqu	48(tp), %xmm3

	pand	%xmm0, %xmm2

	pand	%xmm0, %xmm3

	por	%xmm2, %xmm6

	por	%xmm3, %xmm7

	lea	(tp,n,8), tp

	add	$-1, i

	jne	L(top)

	movdqu	%xmm4, 0(rp)

	movdqu	%xmm5, 16(rp)

	movdqu	%xmm6, 32(rp)

	movdqu	%xmm7, 48(rp)

	lea	64(%r11), tp

	lea	64(rp), rp

	add	$-8, j

	jns	L(outer_top)

L(outer_end):

	test	$4, R8(n)

	je	L(b0xx)

L(b1xx):mov	nents, i

	mov	tp, %r11

	pxor	%xmm13, %xmm13

	pxor	%xmm4, %xmm4

	pxor	%xmm5, %xmm5

	ALIGN(16)

L(tp4):	movdqa	%xmm8, %xmm0

	pcmpeqd	%xmm13, %xmm0

	paddd	%xmm9, %xmm13

	movdqu	0(tp), %xmm2

	movdqu	16(tp), %xmm3

	pand	%xmm0, %xmm2

	pand	%xmm0, %xmm3

	por	%xmm2, %xmm4

	por	%xmm3, %xmm5

	lea	(tp,n,8), tp

	add	$-1, i

	jne	L(tp4)

	movdqu	%xmm4, 0(rp)

	movdqu	%xmm5, 16(rp)

	lea	32(%r11), tp

	lea	32(rp), rp

L(b0xx):test	$2, R8(n)

	je	L(b00x)

L(b01x):mov	nents, i

	mov	tp, %r11

	pxor	%xmm13, %xmm13

	pxor	%xmm4, %xmm4

	ALIGN(16)

L(tp2):	movdqa	%xmm8, %xmm0

	pcmpeqd	%xmm13, %xmm0

	paddd	%xmm9, %xmm13

	movdqu	0(tp), %xmm2

	pand	%xmm0, %xmm2

	por	%xmm2, %xmm4

	lea	(tp,n,8), tp

	add	$-1, i

	jne	L(tp2)

	movdqu	%xmm4, 0(rp)

	lea	16(%r11), tp

	lea	16(rp), rp

L(b00x):test	$1, R8(n)

	je	L(b000)

L(b001):mov	nents, i

	mov	tp, %r11

	pxor	%xmm13, %xmm13

	pxor	%xmm4, %xmm4

	ALIGN(16)

L(tp1):	movdqa	%xmm8, %xmm0

	pcmpeqd	%xmm13, %xmm0

	paddd	%xmm9, %xmm13

	movq	0(tp), %xmm2

	pand	%xmm0, %xmm2

	por	%xmm2, %xmm4

	lea	(tp,n,8), tp

	add	$-1, i

	jne	L(tp1)

	movq	%xmm4, 0(rp)

L(b000):FUNC_EXIT()

	ret

EPILOGUE()

CF_PROT