OpenBLAS/kernel/riscv64/zdot_vector.c

/***************************************************************************
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#include "common.h"
#if !defined(DOUBLE)
#define VSETVL(n) vsetvl_e32m4(n)
#define VSETVL_MAX vsetvlmax_e32m1()
#define FLOAT_V_T vfloat32m4_t
#define FLOAT_V_T_M1 vfloat32m1_t
#define VFMVFS_FLOAT vfmv_f_s_f32m1_f32
#define VLEV_FLOAT vle32_v_f32m4
#define VLSEV_FLOAT vlse32_v_f32m4
#define VFREDSUM_FLOAT vfredusum_vs_f32m4_f32m1
#define VFMACCVV_FLOAT vfmacc_vv_f32m4
#define VFMVVF_FLOAT vfmv_v_f_f32m4
#define VFMVVF_FLOAT_M1 vfmv_v_f_f32m1
#define VFDOTVV_FLOAT vfdot_vv_f32m4
#define VFMULVV_FLOAT vfmul_vv_f32m4
#define VFMSACVV_FLOAT vfmsac_vv_f32m4
#define VFNMSACVV_FLOAT vfnmsac_vv_f32m4
#else
#define VSETVL(n) vsetvl_e64m4(n)
#define VSETVL_MAX vsetvlmax_e64m1()
#define FLOAT_V_T vfloat64m4_t
#define FLOAT_V_T_M1 vfloat64m1_t
#define VFMVFS_FLOAT vfmv_f_s_f64m1_f64
#define VLEV_FLOAT vle64_v_f64m4
#define VLSEV_FLOAT vlse64_v_f64m4
#define VFREDSUM_FLOAT vfredusum_vs_f64m4_f64m1
#define VFMACCVV_FLOAT vfmacc_vv_f64m4
#define VFMVVF_FLOAT vfmv_v_f_f64m4
#define VFMVVF_FLOAT_M1 vfmv_v_f_f64m1
#define VFDOTVV_FLOAT vfdot_vv_f64m4
#define VFMULVV_FLOAT vfmul_vv_f64m4
#define VFMSACVV_FLOAT vfmsac_vv_f64m4
#define VFNMSACVV_FLOAT vfnmsac_vv_f64m4
#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_M1 v_res, v_z0;
        gvl = VSETVL_MAX;
        v_res = VFMVVF_FLOAT_M1(0, gvl);
        v_z0 = VFMVVF_FLOAT_M1(0, gvl);

        FLOAT_V_T vr0, vr1, vx0, vx1, vy0, vy1;
        gvl = VSETVL(n);
        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;
        }
        v_res = VFREDSUM_FLOAT(v_res, vr0, v_z0, gvl);
        dot[0] += VFMVFS_FLOAT(v_res);
        v_res = VFREDSUM_FLOAT(v_res, vr1, v_z0, gvl);
        dot[1] += VFMVFS_FLOAT(v_res);
        //tail
        if(j < n){
                gvl = VSETVL(n-j);
                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
                v_res = VFREDSUM_FLOAT(v_res, vr0, v_z0, gvl);
                dot[0] += VFMVFS_FLOAT(v_res);
                v_res = VFREDSUM_FLOAT(v_res, vr1, v_z0, gvl);
                dot[1] += VFMVFS_FLOAT(v_res);
        }
        CREAL(result) = dot[0];
        CIMAG(result) = dot[1];
        return(result);
}