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Copyright (c) 2016, The OpenBLAS Project
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its contributors may be used to endorse or promote products
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*******************************************************************************/

#include "common.h"
#include "macros_msa.h"

#if !defined(CONJ)
	#define OP2		+=
	#define OP3		-
	#define OP4		+
#else
	#define OP2		-=
	#define OP3		+
	#define OP4		-
#endif

#define DOT16_KERNEL(OPR0, OPR1)  \
	dot0 += (vx0r * vy0r);		  \
	dot0 OPR0## = (vx0i * vy0i);  \
	dot1 OPR1## = (vx0i * vy0r);  \
	dot1 += (vx0r * vy0i); 	      \
								  \
	dot0 += (vx1r * vy1r);        \
	dot0 OPR0## = (vx1i * vy1i);  \
	dot1 OPR1## = (vx1i * vy1r);  \
	dot1 += (vx1r * vy1i); 	      \
								  \
	dot0 += (vx2r * vy2r);        \
	dot0 OPR0## = (vx2i * vy2i);  \
	dot1 OPR1## = (vx2i * vy2r);  \
	dot1 += (vx2r * vy2i); 	      \
								  \
	dot0 += (vx3r * vy3r);        \
	dot0 OPR0## = (vx3i * vy3i);  \
	dot1 OPR1## = (vx3i * vy3r);  \
	dot1 += (vx3r * vy3i);

#define DOT12_KERNEL(OPR0, OPR1)  \
	dot0 += (vx0r * vy0r);		  \
	dot0 OPR0## = (vx0i * vy0i);  \
	dot1 OPR1## = (vx0i * vy0r);  \
	dot1 += (vx0r * vy0i); 	      \
								  \
	dot0 += (vx1r * vy1r);        \
	dot0 OPR0## = (vx1i * vy1i);  \
	dot1 OPR1## = (vx1i * vy1r);  \
	dot1 += (vx1r * vy1i);		  \
								  \
	dot0 += (vx2r * vy2r);        \
	dot0 OPR0## = (vx2i * vy2i);  \
	dot1 OPR1## = (vx2i * vy2r);  \
	dot1 += (vx2r * vy2i);

#define DOT8_KERNEL(OPR0, OPR1)   \
	dot0 += (vx0r * vy0r);		  \
	dot0 OPR0## = (vx0i * vy0i);  \
	dot1 OPR1## = (vx0i * vy0r);  \
	dot1 += (vx0r * vy0i); 	      \
								  \
	dot0 += (vx1r * vy1r);        \
	dot0 OPR0## = (vx1i * vy1i);  \
	dot1 OPR1## = (vx1i * vy1r);  \
	dot1 += (vx1r * vy1i);

#define DOT4_KERNEL(OPR0, OPR1)   \
	dot0 += (vx0r * vy0r);		  \
	dot0 OPR0## = (vx0i * vy0i);  \
	dot1 OPR1## = (vx0i * vy0r);  \
	dot1 += (vx0r * vy0i);

/* return double, x,y double */
/* zdotc -  CONJ */
/* zdotu - !CONJ */
#ifndef _MSC_VER
#include <complex.h>
FLOAT _Complex CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
#else
OPENBLAS_COMPLEX_FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
#endif
{
    BLASLONG i = 0;
    FLOAT dot[2];
    BLASLONG inc_x2;
    BLASLONG inc_y2;
    v2f64 vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7;
    v2f64 vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7;
	v2f64 vx0r, vx0i, vx1r, vx1i, vx2r, vx2i, vx3r, vx3i;
	v2f64 vy0r, vy0i, vy1r, vy1i, vy2r, vy2i, vy3r, vy3i;
    v2f64 dot0 = {0, 0};
    v2f64 dot1 = {0, 0};
    v2f64 zero = {0, 0};
    openblas_complex_double result;

    dot[0] = 0.0;
    dot[1] = 0.0;

    __real__(result) = 0.0;
    __imag__(result) = 0.0;

    if ( n < 1 ) return(result);

    inc_x2 = 2 * inc_x;
    inc_y2 = 2 * inc_y;

	for (i = (n >> 3); i--;)
	{
		LD_DP8_INC(x, inc_x2, vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7);
		LD_DP8_INC(y, inc_y2, vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7);

		PCKEVOD_D2_DP(vx1, vx0, vx0r, vx0i);
		PCKEVOD_D2_DP(vx3, vx2, vx1r, vx1i);
		PCKEVOD_D2_DP(vx5, vx4, vx2r, vx2i);
		PCKEVOD_D2_DP(vx7, vx6, vx3r, vx3i);

		PCKEVOD_D2_DP(vy1, vy0, vy0r, vy0i);
		PCKEVOD_D2_DP(vy3, vy2, vy1r, vy1i);
		PCKEVOD_D2_DP(vy5, vy4, vy2r, vy2i);
		PCKEVOD_D2_DP(vy7, vy6, vy3r, vy3i);

	#if !defined(CONJ)
		DOT16_KERNEL(-, +);
	#else
		DOT16_KERNEL(+, -);
	#endif
	}

	if (n & 7)
	{
		if ((n & 4) && (n & 2))
		{
			LD_DP4_INC(x, inc_x2, vx0, vx1, vx2, vx3);
			LD_DP4_INC(y, inc_y2, vy0, vy1, vy2, vy3);
			LD_DP2_INC(x, inc_x2, vx4, vx5);
			LD_DP2_INC(y, inc_y2, vy4, vy5);

			PCKEVOD_D2_DP(vx1, vx0, vx0r, vx0i);
			PCKEVOD_D2_DP(vx3, vx2, vx1r, vx1i);
			PCKEVOD_D2_DP(vx5, vx4, vx2r, vx2i);

			PCKEVOD_D2_DP(vy1, vy0, vy0r, vy0i);
			PCKEVOD_D2_DP(vy3, vy2, vy1r, vy1i);
			PCKEVOD_D2_DP(vy5, vy4, vy2r, vy2i);

		#if !defined(CONJ)
			DOT12_KERNEL(-, +);
		#else
			DOT12_KERNEL(+, -);
		#endif
		}
		else if (n & 4)
		{
			LD_DP4_INC(x, inc_x2, vx0, vx1, vx2, vx3);
			LD_DP4_INC(y, inc_y2, vy0, vy1, vy2, vy3);

			PCKEVOD_D2_DP(vx1, vx0, vx0r, vx0i);
			PCKEVOD_D2_DP(vx3, vx2, vx1r, vx1i);

			PCKEVOD_D2_DP(vy1, vy0, vy0r, vy0i);
			PCKEVOD_D2_DP(vy3, vy2, vy1r, vy1i);

		#if !defined(CONJ)
			DOT8_KERNEL(-, +);
		#else
			DOT8_KERNEL(+, -);
		#endif
		}
		else if (n & 2)
		{
			LD_DP2_INC(x, inc_x2, vx0, vx1);
			LD_DP2_INC(y, inc_y2, vy0, vy1);
			PCKEVOD_D2_DP(vx1, vx0, vx0r, vx0i);
			PCKEVOD_D2_DP(vy1, vy0, vy0r, vy0i);

		#if !defined(CONJ)
			DOT4_KERNEL(-, +);
		#else
			DOT4_KERNEL(+, -);
		#endif
		}

		if (n & 1)
		{
			vx0 = LD_DP(x);
			vy0 = LD_DP(y);
			PCKEVOD_D2_DP(zero, vx0, vx0r, vx0i);
			PCKEVOD_D2_DP(zero, vy0, vy0r, vy0i);

		#if !defined(CONJ)
			DOT4_KERNEL(-, +);
		#else
			DOT4_KERNEL(+, -);
		#endif
		}
	}

	dot[0] += (dot0[0] + dot0[1]);
	dot[1] += (dot1[0] + dot1[1]);

    __real__(result) = dot[0];
    __imag__(result) = dot[1];

    return(result);
}