OpenBLAS/kernel/riscv64/zdot_vector.c

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#include "common.h"
#if !defined(DOUBLE)
#define RVV_EFLOAT RVV_E32
#define RVV_M RVV_M4
#define FLOAT_V_T float32xm4_t
#define VLEV_FLOAT vlev_float32xm4
#define VLSEV_FLOAT vlsev_float32xm4
#define VFREDSUM_FLOAT vfredsumvs_float32xm4
#define VFMACCVV_FLOAT vfmaccvv_float32xm4
#define VFMVVF_FLOAT vfmvvf_float32xm4
#define VFDOTVV_FLOAT vfdotvv_float32xm4
#define VFMULVV_FLOAT vfmulvv_float32xm4
#define VFMSACVV_FLOAT vfmsacvv_float32xm4
#define VFNMSACVV_FLOAT vfnmsacvv_float32xm4
#else
#define RVV_EFLOAT RVV_E64
#define RVV_M RVV_M4
#define FLOAT_V_T float64xm4_t
#define VLEV_FLOAT vlev_float64xm4
#define VLSEV_FLOAT vlsev_float64xm4
#define VFREDSUM_FLOAT vfredsumvs_float64xm4
#define VFMACCVV_FLOAT vfmaccvv_float64xm4
#define VFMVVF_FLOAT vfmvvf_float64xm4
#define VFDOTVV_FLOAT vfdotvv_float64xm4
#define VFMULVV_FLOAT vfmulvv_float64xm4
#define VFMSACVV_FLOAT vfmsacvv_float64xm4
#define VFNMSACVV_FLOAT vfnmsacvv_float64xm4
#endif

OPENBLAS_COMPLEX_FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
{
        BLASLONG i=0, j=0;
        BLASLONG ix=0,iy=0;
        FLOAT dot[2];
        OPENBLAS_COMPLEX_FLOAT result;

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

        CREAL(result) = 0.0;
        CIMAG(result) = 0.0;

        if ( n < 1 )  return(result);

        unsigned int gvl = 0;

        FLOAT_V_T vr0, vr1, vx0, vx1, vy0, vy1;
        gvl = vsetvli(n, RVV_EFLOAT, RVV_M);
        vr0 = VFMVVF_FLOAT(0, gvl);
        vr1 = VFMVVF_FLOAT(0, gvl);
        BLASLONG stride_x = inc_x * 2 * sizeof(FLOAT);
        BLASLONG stride_y = inc_y * 2 * sizeof(FLOAT);
        BLASLONG inc_xv = inc_x * 2 * gvl;
        BLASLONG inc_yv = inc_y * 2 * gvl;

        for(i=0,j=0; i<n/gvl; i++){
                vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                vy1 = VLSEV_FLOAT(&y[iy+1], stride_y, gvl);

                vr0 = VFMACCVV_FLOAT(vr0, vx0, vy0, gvl);
                vr1 = VFMACCVV_FLOAT(vr1, vx0, vy1, gvl);
#if !defined(CONJ)
                vr0 = VFNMSACVV_FLOAT(vr0, vx1, vy1, gvl);
                vr1 = VFMACCVV_FLOAT(vr1, vx1, vy0, gvl);
#else
                vr0 = VFMACCVV_FLOAT(vr0, vx1, vy1, gvl);
                vr1 = VFNMSACVV_FLOAT(vr1, vx1, vy0, gvl);
#endif
                j += gvl;
                ix += inc_xv;
                iy += inc_yv;
        }
        vx0 = VFMVVF_FLOAT(0, gvl);
        vr0 = VFREDSUM_FLOAT(vr0, vx0, gvl);
        dot[0] += vr0[0];
        vr1 = VFREDSUM_FLOAT(vr1, vx0, gvl);
        dot[1] += vr1[0];
        //tail
        if(j < n){
                gvl = vsetvli(n-j, RVV_EFLOAT, RVV_M);
                vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                vy1 = VLSEV_FLOAT(&y[iy+1], stride_y, gvl);

#if !defined(CONJ)
                vr0 = VFMULVV_FLOAT(vx1, vy1, gvl);
                vr0 = VFMSACVV_FLOAT(vr0, vx0, vy0, gvl);
                vr1 = VFMULVV_FLOAT(vx0, vy1, gvl);
                vr1 = VFMACCVV_FLOAT(vr1, vx1, vy0, gvl);
#else
                vr0 = VFMULVV_FLOAT(vx0, vy0, gvl);
                vr0 = VFMACCVV_FLOAT(vr0, vx1, vy1, gvl);
                vr1 = VFMULVV_FLOAT(vx1, vy0, gvl);
                vr1 = VFMSACVV_FLOAT(vr1, vx0, vy1, gvl);
#endif
                vx0 = VFMVVF_FLOAT(0, gvl);
                vr0 = VFREDSUM_FLOAT(vr0, vx0, gvl);
                dot[0] += vr0[0];
                vr1 = VFREDSUM_FLOAT(vr1, vx0, gvl);
                dot[1] += vr1[0];
        }
        CREAL(result) = dot[0];
        CIMAG(result) = dot[1];
        return(result);
}