OpenBLAS/kernel/mips/cdot_msa.c

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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 float, x,y float */
/* cdotc -  CONJ */
/* cdotu - !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;
    FLOAT x0, x1, x2, x3, x4, x5, x6, x7;
    FLOAT y0, y1, y2, y3, y4, y5, y6, y7;
    v4f32 vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7;
    v4f32 vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7;
	v4f32 vx0r, vx0i, vx1r, vx1i, vx2r, vx2i, vx3r, vx3i;
	v4f32 vy0r, vy0i, vy1r, vy1i, vy2r, vy2i, vy3r, vy3i;
    v4f32 dot0 = {0, 0, 0, 0};
    v4f32 dot1 = {0, 0, 0, 0};
    openblas_complex_float result;

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

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

    if ( n < 1 ) return(result);

    if ((1 == inc_x) && (1 == inc_y))
    {
        for (i = (n >> 4); i--;)
        {
			LD_SP8_INC(x, 4, vx0, vx1, vx2, vx3, vx4, vx5, vx6, vx7);
			LD_SP8_INC(y, 4, vy0, vy1, vy2, vy3, vy4, vy5, vy6, vy7);

			PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
			PCKEVOD_W2_SP(vx3, vx2, vx1r, vx1i);
			PCKEVOD_W2_SP(vx5, vx4, vx2r, vx2i);
			PCKEVOD_W2_SP(vx7, vx6, vx3r, vx3i);

			PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);
			PCKEVOD_W2_SP(vy3, vy2, vy1r, vy1i);
			PCKEVOD_W2_SP(vy5, vy4, vy2r, vy2i);
			PCKEVOD_W2_SP(vy7, vy6, vy3r, vy3i);

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

        if (n & 15)
        {
            if ((n & 8) && (n & 4))
            {
				LD_SP4_INC(x, 4, vx0, vx1, vx2, vx3);
				LD_SP4_INC(y, 4, vy0, vy1, vy2, vy3);
				LD_SP2_INC(x, 4, vx4, vx5);
				LD_SP2_INC(y, 4, vy4, vy5);

				PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
				PCKEVOD_W2_SP(vx3, vx2, vx1r, vx1i);
				PCKEVOD_W2_SP(vx5, vx4, vx2r, vx2i);

				PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);
				PCKEVOD_W2_SP(vy3, vy2, vy1r, vy1i);
				PCKEVOD_W2_SP(vy5, vy4, vy2r, vy2i);

			#if !defined(CONJ)
				DOT12_KERNEL(-, +);
			#else
				DOT12_KERNEL(+, -);
			#endif
            }
            else if (n & 8)
            {
				LD_SP4_INC(x, 4, vx0, vx1, vx2, vx3);
				LD_SP4_INC(y, 4, vy0, vy1, vy2, vy3);

				PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
				PCKEVOD_W2_SP(vx3, vx2, vx1r, vx1i);

				PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);
				PCKEVOD_W2_SP(vy3, vy2, vy1r, vy1i);

			#if !defined(CONJ)
				DOT8_KERNEL(-, +);
			#else
				DOT8_KERNEL(+, -);
			#endif
            }
			else if (n & 4)
            {
				LD_SP2_INC(x, 4, vx0, vx1);
				LD_SP2_INC(y, 4, vy0, vy1);
				PCKEVOD_W2_SP(vx1, vx0, vx0r, vx0i);
				PCKEVOD_W2_SP(vy1, vy0, vy0r, vy0i);

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

			if ((n & 2) && (n & 1))
			{
                LD_GP6_INC(x, 1, x0, x1, x2, x3, x4, x5);
                LD_GP6_INC(y, 1, y0, y1, y2, y3, y4, y5);

				dot[0] += ( x0 * y0 OP3 x1 * y1 );
				dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );

				dot[0] += ( x2 * y2 OP3 x3 * y3 );
				dot[1] OP2 ( x3 * y2 OP4 x2 * y3 );

				dot[0] += ( x4 * y4 OP3 x5 * y5 );
				dot[1] OP2 ( x5 * y4 OP4 x4 * y5 );
			}
			else if (n & 2)
			{
                LD_GP4_INC(x, 1, x0, x1, x2, x3);
                LD_GP4_INC(y, 1, y0, y1, y2, y3);

				dot[0] += ( x0 * y0 OP3 x1 * y1 );
				dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );

				dot[0] += ( x2 * y2 OP3 x3 * y3 );
				dot[1] OP2 ( x3 * y2 OP4 x2 * y3 );
			}
			else if (n & 1)
			{
                LD_GP2_INC(x, 1, x0, x1);
                LD_GP2_INC(y, 1, y0, y1);

				dot[0] += ( x0 * y0 OP3 x1 * y1 );
				dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );
			}
        }

		dot[0] += (dot0[0] + dot0[1] + dot0[2] + dot0[3]);
		dot[1] += (dot1[0] + dot1[1] + dot1[2] + dot1[3]);
	}
	else
	{
		inc_x2 = 2 * inc_x;
		inc_y2 = 2 * inc_y;

		for (i = (n >> 2); i--;)
		{
			x0 = *x;
			x1 = *(x + 1);
			x += inc_x2;
			x2 = *x;
			x3 = *(x + 1);
			x += inc_x2;
			x4 = *x;
			x5 = *(x + 1);
			x += inc_x2;
			x6 = *x;
			x7 = *(x + 1);
			x += inc_x2;

			y0 = *y;
			y1 = *(y + 1);
			y += inc_y2;
			y2 = *y;
			y3 = *(y + 1);
			y += inc_y2;
			y4 = *y;
			y5 = *(y + 1);
			y += inc_y2;
			y6 = *y;
			y7 = *(y + 1);
			y += inc_y2;

			dot[0] += ( x0 * y0 OP3 x1 * y1 );
			dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );

			dot[0] += ( x2 * y2 OP3 x3 * y3 );
			dot[1] OP2 ( x3 * y2 OP4 x2 * y3 );

			dot[0] += ( x4 * y4 OP3 x5 * y5 );
			dot[1] OP2 ( x5 * y4 OP4 x4 * y5 );

			dot[0] += ( x6 * y6 OP3 x7 * y7 );
			dot[1] OP2 ( x7 * y6 OP4 x6 * y7 );
		}

		if ((n & 2) && (n & 1))
		{
			x0 = *x;
			x1 = *(x + 1);
			x += inc_x2;
			x2 = *x;
			x3 = *(x + 1);
			x += inc_x2;
			x4 = *x;
			x5 = *(x + 1);
			x += inc_x2;

			y0 = *y;
			y1 = *(y + 1);
			y += inc_y2;
			y2 = *y;
			y3 = *(y + 1);
			y += inc_y2;
			y4 = *y;
			y5 = *(y + 1);
			y += inc_y2;

			dot[0] += ( x0 * y0 OP3 x1 * y1 );
			dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );

			dot[0] += ( x2 * y2 OP3 x3 * y3 );
			dot[1] OP2 ( x3 * y2 OP4 x2 * y3 );

			dot[0] += ( x4 * y4 OP3 x5 * y5 );
			dot[1] OP2 ( x5 * y4 OP4 x4 * y5 );
		}
		else if (n & 2)
		{
			x0 = *x;
			x1 = *(x + 1);
			x += inc_x2;
			x2 = *x;
			x3 = *(x + 1);
			x += inc_x2;

			y0 = *y;
			y1 = *(y + 1);
			y += inc_y2;
			y2 = *y;
			y3 = *(y + 1);
			y += inc_y2;

			dot[0] += ( x0 * y0 OP3 x1 * y1 );
			dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );

			dot[0] += ( x2 * y2 OP3 x3 * y3 );
			dot[1] OP2 ( x3 * y2 OP4 x2 * y3 );
		}
		else if (n & 1)
		{
			x0 = *x;
			x1 = *(x + 1);
			x += inc_x2;

			y0 = *y;
			y1 = *(y + 1);
			y += inc_y2;

			dot[0] += ( x0 * y0 OP3 x1 * y1 );
			dot[1] OP2 ( x1 * y0 OP4 x0 * y1 );
		}
	}

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

    return(result);
}