OpenBLAS/kernel/mips64/daxpy_loongson3a_simd.S

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Copyright (c) 2011-2014, The OpenBLAS Project
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/*********************************************************************/
/* 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    */
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/* 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 PREFETCH_DISTANCE 2016

#define N	$4

#define X	$8
#define INCX	$9

#define Y	$10
#define INCY	$11

#define I	$2
#define TEMP	$3

#define YY	$5

#define ALPHA	$f15

#define a1	$f0
#define a2	$f1
#define a3	$f2
#define a4	$f3
#define a5	$f4
#define a6	$f5
#define a7	$f6
#define a8	$f7

#define a9	$f8
#define a10	$f9
#define a11	$f10
#define a12	$f11
#define a13	$f12
#define a14	$f13
#define a15	$f14
#define a16	$f17

#define t1	$f18
#define t2	$f19
#define t3	$f20
#define t4	$f21

#define b1	$f22
#define b2	$f23
#define b3	$f24
#define b4	$f25

#define b5	$f26
#define b6	$f27
#define b7	$f28
#define b8	$f29


#define A1	 0
#define A2	 1
#define A3	 2
#define A4	 3
#define A5	 4
#define A6	 5
#define A7	 6
#define A8	 7

#define A9	 8
#define A10	 9
#define A11	 10
#define A12	 11
#define A13	 12
#define A14	 13
#define A15	 14
#define A16	 17

#define T1	 18
#define T2	 19
#define T3	 20
#define T4	 21

#define B1	 22
#define B2	 23
#define B3	 24
#define B4	 25

#define B5	 26
#define B6	 27
#define B7	 28
#define B8	 29

#define X_BASE 8
#define Y_BASE 10

#define gsLQC1_(base,fq,ft,offset) .word (0x32<<26|base<<21|ft<<16|0x1<<15|offset<<6|0x1<<5|fq)
#define gsLQC1(base,fq,ft,offset) gsLQC1_((base), (fq), (ft), (offset))

#define gsSQC1_(base,fq,ft,offset) .word (0x3A<<26|base<<21|ft<<16|0x1<<15|offset<<6|0x1<<5|fq)
#define gsSQC1(base,fq,ft,offset) gsSQC1_((base), (fq), (ft), (offset))

	PROLOGUE

#ifndef __64BIT__
	daddiu	$sp, $sp, -40
	sdc1	$f20, 0($sp)
	sdc1	$f22, 8($sp)
	sdc1	$f24, 16($sp)
	sdc1	$f26, 24($sp)
	sdc1	$f28, 32($sp)
#else
	daddiu	$sp, $sp, -48
	sdc1	$f24, 0($sp)
	sdc1	$f25, 8($sp)
	sdc1	$f26, 16($sp)
	sdc1	$f27, 24($sp)
	sdc1	$f28, 32($sp)
	sdc1	$f29, 40($sp)
#endif



	li	TEMP, SIZE

	blez	N, .L999
	dsll	INCX, INCX, BASE_SHIFT

	bne	INCX, TEMP, .L20
	dsll	INCY, INCY, BASE_SHIFT

	bne	INCY, TEMP, .L20

	//Dose  the address of Y algin 16 bytes?
	andi	TEMP,  Y, 8
	beq	TEMP, $0, .L10
	//Y unalgin. Compute this unalgined element.
	LD	a1,  0 * SIZE(X)
	LD	b1,  0 * SIZE(Y)

	daddiu	X, X, SIZE
	daddiu	Y, Y, SIZE

	MADD	t1, b1, ALPHA, a1
	daddiu	N, N, -1

	ST	t1, -1 * SIZE(Y)
	blez	N, .L999
	.align 5

.L10:

	dsra	I, N, 4

	blez	I, .L15
	daddiu	I, I, -1

	//Y algin. We need test X address
	//Dose  the address of X algin 16 bytes?
	andi	TEMP,  X, 8
	bne	TEMP, $0, .L30  ///
	.align 5

.L11:
	//X & Y algin
	gsLQC1(X_BASE,A2,A1,0)
	gsLQC1(X_BASE,A4,A3,1)
	gsLQC1(X_BASE,A6,A5,2)
	gsLQC1(X_BASE,A8,A7,3)

	gsLQC1(X_BASE,A10,A9,4)
	gsLQC1(X_BASE,A12,A11,5)
	gsLQC1(X_BASE,A14,A13,6)
	gsLQC1(X_BASE,A16,A15,7)

	gsLQC1(Y_BASE,B2,B1,0)
	gsLQC1(Y_BASE,B4,B3,1)
	gsLQC1(Y_BASE,B6,B5,2)
	gsLQC1(Y_BASE,B8,B7,3)

	blez	I, .L13
	NOP
	.align 5

.L12:

	MADD	t1, b1, ALPHA, a1
	MADD	t2, b2, ALPHA, a2
	gsSQC1(Y_BASE, T2, T1, 0)
	gsLQC1(Y_BASE,B2,B1,4)

	MADD	t3, b3, ALPHA, a3
	MADD	t4, b4, ALPHA, a4
	gsSQC1(Y_BASE, T4, T3, 1)
	gsLQC1(Y_BASE,B4,B3,5)

	PREFETCHD(PREFETCH_DISTANCE*SIZE(Y))
	PREFETCHD((PREFETCH_DISTANCE+4)*SIZE(Y))

	MADD	t1, b5, ALPHA, a5
	MADD	t2, b6, ALPHA, a6
	gsSQC1(Y_BASE, T2, T1, 2)
	gsLQC1(Y_BASE,B6,B5,6)

	MADD	t3, b7, ALPHA, a7
	MADD	t4, b8, ALPHA, a8
	gsSQC1(Y_BASE, T4, T3, 3)
	gsLQC1(Y_BASE,B8,B7, 7)

	PREFETCHD((PREFETCH_DISTANCE+8)*SIZE(Y))
	PREFETCHD((PREFETCH_DISTANCE+12)*SIZE(Y))

	MADD	t1, b1, ALPHA, a9
	MADD	t2, b2, ALPHA, a10
	gsSQC1(Y_BASE, T2, T1, 4)
	gsLQC1(Y_BASE,B2,B1,8)

	MADD	t3, b3, ALPHA, a11
	MADD	t4, b4, ALPHA, a12
	gsSQC1(Y_BASE, T4, T3, 5)
	gsLQC1(Y_BASE,B4,B3,9)

	PREFETCHD(PREFETCH_DISTANCE*SIZE(X))
	PREFETCHD((PREFETCH_DISTANCE+4)*SIZE(X))

	MADD	t1, b5, ALPHA, a13
	MADD	t2, b6, ALPHA, a14
	gsSQC1(Y_BASE, T2, T1, 6)
	gsLQC1(Y_BASE,B6,B5,10)

	MADD	t3, b7, ALPHA, a15
	MADD	t4, b8, ALPHA, a16
	gsSQC1(Y_BASE, T4, T3, 7)
	gsLQC1(Y_BASE,B8,B7,11)

	PREFETCHD((PREFETCH_DISTANCE+8)*SIZE(X))
	PREFETCHD((PREFETCH_DISTANCE+12)*SIZE(X))

	gsLQC1(X_BASE,A2,A1,8)
	gsLQC1(X_BASE,A4,A3,9)
	gsLQC1(X_BASE,A6,A5,10)
	gsLQC1(X_BASE,A8,A7,11)

	gsLQC1(X_BASE,A10,A9,12)
	gsLQC1(X_BASE,A12,A11,13)
	gsLQC1(X_BASE,A14,A13,14)
	gsLQC1(X_BASE,A16,A15,15)


	daddiu	I, I, -1
	daddiu	Y, Y, 16 * SIZE

	daddiu	X, X, 16 * SIZE
	bgtz	I, .L12

	.align 5

.L13:

	MADD	t1, b1, ALPHA, a1
	MADD	t2, b2, ALPHA, a2
	gsSQC1(Y_BASE, T2, T1, 0)
	gsLQC1(Y_BASE,B2,B1,4)

	MADD	t3, b3, ALPHA, a3
	MADD	t4, b4, ALPHA, a4
	gsSQC1(Y_BASE, T4, T3, 1)
	gsLQC1(Y_BASE,B4,B3,5)


	MADD	t1, b5, ALPHA, a5
	MADD	t2, b6, ALPHA, a6
	gsSQC1(Y_BASE, T2, T1, 2)
	gsLQC1(Y_BASE,B6,B5,6)

	MADD	t3, b7, ALPHA, a7
	MADD	t4, b8, ALPHA, a8
	gsSQC1(Y_BASE, T4, T3, 3)
	gsLQC1(Y_BASE,B8,B7,7)


	MADD	t1, b1, ALPHA, a9
	MADD	t2, b2, ALPHA, a10
	gsSQC1(Y_BASE, T2, T1, 4)


	MADD	t3, b3, ALPHA, a11
	MADD	t4, b4, ALPHA, a12
	gsSQC1(Y_BASE, T4, T3, 5)


	MADD	t1, b5, ALPHA, a13
	MADD	t2, b6, ALPHA, a14
	gsSQC1(Y_BASE, T2, T1, 6)


	MADD	t3, b7, ALPHA, a15
	MADD	t4, b8, ALPHA, a16
	gsSQC1(Y_BASE, T4, T3, 7)


	daddiu	X, X, 16 * SIZE
	daddiu	Y, Y, 16 * SIZE
	.align 5

.L15:
	andi	I,  N, 15

	blez	I, .L999
	NOP
	.align	5

.L16:
	LD	a1,  0 * SIZE(X)
	LD	b1,  0 * SIZE(Y)

	daddiu	X, X, SIZE
	daddiu	Y, Y, SIZE

	MADD	t1, b1, ALPHA, a1
	daddiu	I, I, -1

	bgtz	I, .L16
	ST	t1, -1 * SIZE(Y)


#ifndef __64BIT__
	ldc1	$f20, 0($sp)
	ldc1	$f22, 8($sp)
	ldc1	$f24, 16($sp)
	ldc1	$f26, 24($sp)
	ldc1	$f28, 32($sp)
	daddiu	$sp, $sp, 40
#else
	ldc1	$f24, 0($sp)
	ldc1	$f25, 8($sp)
	ldc1	$f26, 16($sp)
	ldc1	$f27, 24($sp)
	ldc1	$f28, 32($sp)
	ldc1	$f29, 40($sp)
	daddiu	$sp, $sp, 48
#endif

	j	$31
	NOP
	.align 5

.L30:
	//Y align, X unalign, INCX==INCY==1
	//unloop 16

	LD	a1,  0 * SIZE(X)
	daddiu	X, X, SIZE
	gsLQC1(X_BASE,A3,A2,0)
	gsLQC1(X_BASE,A5,A4,1)
	gsLQC1(X_BASE,A7,A6,2)
	gsLQC1(X_BASE,A9,A8,3)

	gsLQC1(X_BASE,A11,A10,4)
	gsLQC1(X_BASE,A13,A12,5)
	gsLQC1(X_BASE,A15,A14,6)
	LD	a16,  14 * SIZE(X)


	gsLQC1(Y_BASE,B2,B1,0)
	gsLQC1(Y_BASE,B4,B3,1)
	gsLQC1(Y_BASE,B6,B5,2)
	gsLQC1(Y_BASE,B8,B7,3)

	blez	I, .L32
	NOP
	.align 5

.L31:
	MADD	t1, b1, ALPHA, a1
	MADD	t2, b2, ALPHA, a2
	gsSQC1(Y_BASE, T2, T1, 0)
	gsLQC1(Y_BASE,B2,B1,4)

	MADD	t3, b3, ALPHA, a3
	MADD	t4, b4, ALPHA, a4
	gsSQC1(Y_BASE, T4, T3, 1)
	gsLQC1(Y_BASE,B4,B3,5)

	PREFETCHD(PREFETCH_DISTANCE*SIZE(Y))
	PREFETCHD((PREFETCH_DISTANCE+4)*SIZE(Y))

	MADD	t1, b5, ALPHA, a5
	MADD	t2, b6, ALPHA, a6
	gsSQC1(Y_BASE, T2, T1, 2)
	gsLQC1(Y_BASE,B6,B5,6)

	MADD	t3, b7, ALPHA, a7
	MADD	t4, b8, ALPHA, a8
	gsSQC1(Y_BASE, T4, T3, 3)
	gsLQC1(Y_BASE,B8,B7,7)

	PREFETCHD((PREFETCH_DISTANCE+8)*SIZE(Y))
	PREFETCHD((PREFETCH_DISTANCE+12)*SIZE(Y))

	MADD	t1, b1, ALPHA, a9
	MADD	t2, b2, ALPHA, a10
	gsSQC1(Y_BASE, T2, T1, 4)
	gsLQC1(Y_BASE,B2,B1,8)

	MADD	t3, b3, ALPHA, a11
	MADD	t4, b4, ALPHA, a12
	gsSQC1(Y_BASE, T4, T3, 5)
	gsLQC1(Y_BASE,B4,B3,9)

	PREFETCHD(PREFETCH_DISTANCE*SIZE(X))
	PREFETCHD((PREFETCH_DISTANCE+4)*SIZE(X))

	MADD	t1, b5, ALPHA, a13
	MADD	t2, b6, ALPHA, a14
	gsSQC1(Y_BASE, T2, T1, 6)
	gsLQC1(Y_BASE,B6,B5,10)

	MADD	t3, b7, ALPHA, a15
	MADD	t4, b8, ALPHA, a16
	gsSQC1(Y_BASE, T4, T3, 7)
	gsLQC1(Y_BASE,B8,B7,11)

	PREFETCHD((PREFETCH_DISTANCE+8)*SIZE(X))
	PREFETCHD((PREFETCH_DISTANCE+12)*SIZE(X))

	LD	a1,  15 * SIZE(X)
	gsLQC1(X_BASE,A3,A2,8)
	gsLQC1(X_BASE,A5,A4,9)
	gsLQC1(X_BASE,A7,A6,10)
	gsLQC1(X_BASE,A9,A8,11)

	gsLQC1(X_BASE,A11,A10,12)
	gsLQC1(X_BASE,A13,A12,13)
	gsLQC1(X_BASE,A15,A14,14)
	LD	a16,  30 * SIZE(X)

	daddiu	I, I, -1
	daddiu	Y, Y, 16 * SIZE

	daddiu	X, X, 16 * SIZE
	bgtz	I, .L31

	.align 5
//Loop end:
.L32:

	MADD	t1, b1, ALPHA, a1
	MADD	t2, b2, ALPHA, a2
	gsSQC1(Y_BASE, T2, T1, 0)
	gsLQC1(Y_BASE,B2,B1,4)

	MADD	t3, b3, ALPHA, a3
	MADD	t4, b4, ALPHA, a4
	gsSQC1(Y_BASE, T4, T3, 1)
	gsLQC1(Y_BASE,B4,B3,5)


	MADD	t1, b5, ALPHA, a5
	MADD	t2, b6, ALPHA, a6
	gsSQC1(Y_BASE, T2, T1, 2)
	gsLQC1(Y_BASE,B6,B5,6)

	MADD	t3, b7, ALPHA, a7
	MADD	t4, b8, ALPHA, a8
	gsSQC1(Y_BASE, T4, T3, 3)
	gsLQC1(Y_BASE,B8,B7,7)


	MADD	t1, b1, ALPHA, a9
	MADD	t2, b2, ALPHA, a10
	gsSQC1(Y_BASE, T2, T1, 4)


	MADD	t3, b3, ALPHA, a11
	MADD	t4, b4, ALPHA, a12
	gsSQC1(Y_BASE, T4, T3, 5)


	MADD	t1, b5, ALPHA, a13
	MADD	t2, b6, ALPHA, a14
	gsSQC1(Y_BASE, T2, T1, 6)


	MADD	t3, b7, ALPHA, a15
	MADD	t4, b8, ALPHA, a16
	gsSQC1(Y_BASE, T4, T3, 7)


	daddiu	X, X, 15 * SIZE
	daddiu	Y, Y, 16 * SIZE

	//jump back to the remain process.
	b	.L15
	.align 5

//INCX!=1 or INCY != 1
.L20:
	beq	INCY, $0, .L27
	dsra	I, N, 3
	move	YY, Y

	blez	I, .L25
	daddiu	I, I, -1

	LD	a1,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b1,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a2,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b2,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a3,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b3,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a4,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b4,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a5,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b5,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a6,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b6,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a7,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b7,  0 * SIZE(Y)
	daddu	Y, Y, INCY
	LD	a8,  0 * SIZE(X)
	daddu	X, X, INCX
	LD	b8,  0 * SIZE(Y)
	daddu	Y, Y, INCY

	blez	I, .L23
	NOP
	.align 5

.L22:
	MADD	t1, b1, ALPHA, a1
	LD	a1,  0 * SIZE(X)
	LD	b1,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	MADD	t2, b2, ALPHA, a2
	LD	a2,  0 * SIZE(X)
	LD	b2,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	MADD	t3, b3, ALPHA, a3
	LD	a3,  0 * SIZE(X)
	LD	b3,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	MADD	t4, b4, ALPHA, a4
	LD	a4,  0 * SIZE(X)
	LD	b4,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	ST	t1,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t1, b5, ALPHA, a5

	LD	a5,  0 * SIZE(X)
	LD	b5,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	ST	t2,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t2, b6, ALPHA, a6

	LD	a6,  0 * SIZE(X)
	LD	b6,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	ST	t3,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t3, b7, ALPHA, a7

	LD	a7,  0 * SIZE(X)
	LD	b7,  0 * SIZE(Y)
	daddu	X, X, INCX
	daddu	Y, Y, INCY

	ST	t4,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t4, b8, ALPHA, a8

	LD	a8,  0 * SIZE(X)
	daddu	X, X, INCX

	LD	b8,  0 * SIZE(Y)
	daddu	Y, Y, INCY

	ST	t1,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	ST	t2,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	ST	t3,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	ST	t4,  0 * SIZE(YY)
	daddiu	I, I, -1

	bgtz	I, .L22
	daddu	YY, YY, INCY
	.align 5

.L23:
	MADD	t1, b1, ALPHA, a1
	MADD	t2, b2, ALPHA, a2
	MADD	t3, b3, ALPHA, a3
	MADD	t4, b4, ALPHA, a4

	ST	t1,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t1, b5, ALPHA, a5

	ST	t2,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t2, b6, ALPHA, a6

	ST	t3,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t3, b7, ALPHA, a7

	ST	t4,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	MADD	t4, b8, ALPHA, a8

	ST	t1,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	ST	t2,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	ST	t3,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	ST	t4,  0 * SIZE(YY)
	daddu	YY, YY, INCY
	.align 5

.L25:
	andi	I,  N, 7

	blez	I, .L999
	NOP
	.align	5

.L26:
	LD	a1,  0 * SIZE(X)
	LD	b1,  0 * SIZE(Y)

	MADD	t1, b1, ALPHA, a1
	daddu	X, X, INCX

	ST	t1,  0 * SIZE(Y)
	daddiu	I, I, -1

	bgtz	I, .L26
	daddu	Y, Y, INCY
	.align 5

.L999:

#ifndef __64BIT__
	ldc1	$f20, 0($sp)
	ldc1	$f22, 8($sp)
	ldc1	$f24, 16($sp)
	ldc1	$f26, 24($sp)
	ldc1	$f28, 32($sp)
	daddiu	$sp, $sp, 40
#else
	ldc1	$f24, 0($sp)
	ldc1	$f25, 8($sp)
	ldc1	$f26, 16($sp)
	ldc1	$f27, 24($sp)
	ldc1	$f28, 32($sp)
	ldc1	$f29, 40($sp)
	daddiu	$sp, $sp, 48
#endif

	j	$31
	NOP
	.align  3
.L27:
	LD	b1,  0 * SIZE(Y)

.L28:
	daddiu	N, N, -1
	LD	a1,  0 * SIZE(X)
	daddu	X, X, INCX
	bgtz	N, .L28
	MADD	b1, b1, ALPHA, a1

	j	.L999
	ST	b1,  0 * SIZE(Y)
	
	EPILOGUE