/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
/* All rights reserved.                                              */
/*                                                                   */
/* Redistribution and use in source and binary forms, with or        */
/* without modification, are permitted provided that the following   */
/* conditions are met:                                               */
/*                                                                   */
/*   1. Redistributions of source code must retain the above         */
/*      copyright notice, this list of conditions and the following  */
/*      disclaimer.                                                  */
/*                                                                   */
/*   2. Redistributions in binary form must reproduce the above      */
/*      copyright notice, this list of conditions and the following  */
/*      disclaimer in the documentation and/or other materials       */
/*      provided with the distribution.                              */
/*                                                                   */
/*    THIS  SOFTWARE IS PROVIDED  BY THE  UNIVERSITY OF  TEXAS AT    */
/*    AUSTIN  ``AS IS''  AND ANY  EXPRESS OR  IMPLIED WARRANTIES,    */
/*    INCLUDING, BUT  NOT LIMITED  TO, THE IMPLIED  WARRANTIES OF    */
/*    MERCHANTABILITY  AND FITNESS FOR  A PARTICULAR  PURPOSE ARE    */
/*    DISCLAIMED.  IN  NO EVENT SHALL THE UNIVERSITY  OF TEXAS AT    */
/*    AUSTIN OR CONTRIBUTORS BE  LIABLE FOR ANY DIRECT, INDIRECT,    */
/*    INCIDENTAL,  SPECIAL, EXEMPLARY,  OR  CONSEQUENTIAL DAMAGES    */
/*    (INCLUDING, BUT  NOT LIMITED TO,  PROCUREMENT OF SUBSTITUTE    */
/*    GOODS  OR  SERVICES; LOSS  OF  USE,  DATA,  OR PROFITS;  OR    */
/*    BUSINESS INTERRUPTION) HOWEVER CAUSED  AND ON ANY THEORY OF    */
/*    LIABILITY, WHETHER  IN CONTRACT, STRICT  LIABILITY, OR TORT    */
/*    (INCLUDING NEGLIGENCE OR OTHERWISE)  ARISING IN ANY WAY OUT    */
/*    OF  THE  USE OF  THIS  SOFTWARE,  EVEN  IF ADVISED  OF  THE    */
/*    POSSIBILITY OF SUCH DAMAGE.                                    */
/*                                                                   */
/* The views and conclusions contained in the software and           */
/* documentation are those of the authors and should not be          */
/* interpreted as representing official policies, either expressed   */
/* or implied, of The University of Texas at Austin.                 */
/*********************************************************************/

#define ASSEMBLER
#include "common.h"

#define N	$4
#define	X	$5
#define INCX	$6
	
#define I	$2
#define TEMP	$3

#define a1	$f6
#define a2	$f7
#define a3	$f8
#define a4	$f9
#define a5	$f10
#define a6	$f11
#define a7	$f12
#define a8	$f13

#define s1	$f0
#define s2	$f1

#define t1	$f2
#define t2	$f3
#define t3	$f4
#define t4	$f5


	PROLOGUE
	
#ifdef F_INTERFACE
	LDINT	N,     0(N)
	LDINT	INCX,  0(INCX)
#endif

	dmtc1	$0,  s1
	li	TEMP, 2 * SIZE

	blez	N, .L999
	mov.d	s2, s1

	blez	INCX, .L999
	dsll	INCX, INCX, ZBASE_SHIFT

	dsra	I, N, 2

	blez	I, .L25
	NOP

	LD	a1,  0 * SIZE(X)
	LD	a2,  1 * SIZE(X)
	daddu	X, X, INCX

	LD	a3,  0 * SIZE(X)
	LD	a4,  1 * SIZE(X)
	daddu	X, X, INCX

	LD	a5,  0 * SIZE(X)
	LD	a6,  1 * SIZE(X)

	daddu	X, X, INCX
	cvt.d.s	t1, a1

	LD	a7,  0 * SIZE(X)
	cvt.d.s	t2, a2

	LD	a8,  1 * SIZE(X)
	cvt.d.s	t3, a3

	daddiu	I, I, -1
	cvt.d.s	t4, a4

	blez	I, .L24
	daddu	X, X, INCX
	.align 3

.L23:
	madd.d	s1, s1, t1, t1
	LD	a1,  0 * SIZE(X)

	cvt.d.s	t1, a5
	NOP
	
	madd.d	s2, s2, t2, t2
	LD	a2,  1 * SIZE(X)

	cvt.d.s	t2, a6
	daddu	X, X, INCX

	madd.d	s1, s1, t3, t3
	LD	a3,  0 * SIZE(X)

	cvt.d.s	t3, a7
	NOP

	madd.d	s2, s2, t4, t4
	LD	a4,  1 * SIZE(X)

	cvt.d.s	t4, a8
	daddu	X, X, INCX

	madd.d	s1, s1, t1, t1
	LD	a5,  0 * SIZE(X)

	cvt.d.s	t1, a1
	daddiu	I, I, -1

	madd.d	s2, s2, t2, t2
	LD	a6,  1 * SIZE(X)

	cvt.d.s	t2, a2
	daddu	X, X, INCX

	madd.d	s1, s1, t3, t3
	LD	a7,  0 * SIZE(X)

	cvt.d.s	t3, a3
	LD	a8,  1 * SIZE(X)

	madd.d	s2, s2, t4, t4
	daddu	X, X, INCX

	bgtz	I, .L23
	cvt.d.s	t4, a4
	.align 3

.L24:
	madd.d	s1, s1, t1, t1
	cvt.d.s	t1, a5

	madd.d	s2, s2, t2, t2
	cvt.d.s	t2, a6

	madd.d	s1, s1, t3, t3
	cvt.d.s	t3, a7

	madd.d	s2, s2, t4, t4
	cvt.d.s	t4, a8

	madd.d	s1, s1, t1, t1
	madd.d	s2, s2, t2, t2
	madd.d	s1, s1, t3, t3
	madd.d	s2, s2, t4, t4
	.align 3

.L25:
	andi	I,  N, 3

	blez	I, .L999
	NOP
	.align	3

.L26:
	LD	a1,  0 * SIZE(X)
	LD	a2,  1 * SIZE(X)
	daddiu	I, I, -1

	cvt.d.s	t1, a1
	cvt.d.s	t2, a2
	
	madd.d	s1, s1, t1, t1
	daddu	X, X, INCX

	bgtz	I, .L26
	madd.d	s2, s2, t2, t2
	.align 3

.L999:
	add.d	s1, s1, s2

	sqrt.d	s1, s1

	j	$31
	cvt.s.d	s1, s1
	
	EPILOGUE