OpenBLAS/kernel/riscv64/dot_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 VLEV_FLOAT vle_v_f32m4
#define VLSEV_FLOAT vlse_v_f32m4
#define VFREDSUM_FLOAT vfredsum_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
#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 VLEV_FLOAT vle_v_f64m4
#define VLSEV_FLOAT vlse_v_f64m4
#define VFREDSUM_FLOAT vfredsum_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
#endif

#if defined(DSDOT)
double CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
#else
FLOAT CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
#endif
{
	BLASLONG i=0, j=0;
	double dot = 0.0 ;

	if ( n < 0 )  return(dot);

        FLOAT_V_T vr, vx, vy;
        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);

        if(inc_x == 1 && inc_y == 1){
                gvl = VSETVL(n);
                vr = VFMVVF_FLOAT(0, gvl);
                for(i=0,j=0; i<n/gvl; i++){
                        vx = VLEV_FLOAT(&x[j], gvl);
                        vy = VLEV_FLOAT(&y[j], gvl);
                        vr = VFMACCVV_FLOAT(vr, vx, vy, gvl);
                        j += gvl;
                }
                if(j > 0){
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
                //tail
                if(j < n){
                        gvl = VSETVL(n-j);
                        vx = VLEV_FLOAT(&x[j], gvl);
                        vy = VLEV_FLOAT(&y[j], gvl);
                        FLOAT_V_T vz = VFMVVF_FLOAT(0, gvl);
                        //vr = VFDOTVV_FLOAT(vx, vy, gvl);
                        vr = VFMACCVV_FLOAT(vz, vx, vy, gvl);
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
        }else if(inc_y == 1){
                gvl = VSETVL(n);
                vr = VFMVVF_FLOAT(0, gvl);
                unsigned int stride_x = inc_x * sizeof(FLOAT);
                for(i=0,j=0; i<n/gvl; i++){
                        vx = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
                        vy = VLEV_FLOAT(&y[j], gvl);
                        vr = VFMACCVV_FLOAT(vr, vx, vy, gvl);
                        j += gvl;
                }
                if(j > 0){
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
                //tail
                if(j < n){
                        gvl = VSETVL(n-j);
                        vx = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
                        vy = VLEV_FLOAT(&y[j], gvl);
                        FLOAT_V_T vz = VFMVVF_FLOAT(0, gvl);
                        //vr = VFDOTVV_FLOAT(vx, vy, gvl);
                        vr = VFMACCVV_FLOAT(vz, vx, vy, gvl);
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
        }else if(inc_x == 1){
                gvl = VSETVL(n);
                vr = VFMVVF_FLOAT(0, gvl);
                unsigned int stride_y = inc_y * sizeof(FLOAT);
                for(i=0,j=0; i<n/gvl; i++){
                        vx = VLEV_FLOAT(&x[j], gvl);
                        vy = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
                        vr = VFMACCVV_FLOAT(vr, vx, vy, gvl);
                        j += gvl;
                }
                if(j > 0){
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
                //tail
                if(j < n){
                        gvl = VSETVL(n-j);
                        vx = VLEV_FLOAT(&x[j], gvl);
                        vy = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
                        FLOAT_V_T vz = VFMVVF_FLOAT(0, gvl);
                        //vr = VFDOTVV_FLOAT(vx, vy, gvl);
                        vr = VFMACCVV_FLOAT(vz, vx, vy, gvl);
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
        }else{
                gvl = VSETVL(n);
                vr = VFMVVF_FLOAT(0, gvl);
                unsigned int stride_x = inc_x * sizeof(FLOAT);
                unsigned int stride_y = inc_y * sizeof(FLOAT);
                for(i=0,j=0; i<n/gvl; i++){
                        vx = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
                        vy = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
                        vr = VFMACCVV_FLOAT(vr, vx, vy, gvl);
                        j += gvl;
                }
                if(j > 0){
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
                //tail
                if(j < n){
                        gvl = VSETVL(n-j);
                        vx = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
                        vy = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
                        FLOAT_V_T vz = VFMVVF_FLOAT(0, gvl);
                        //vr = VFDOTVV_FLOAT(vx, vy, gvl);
                        vr = VFMACCVV_FLOAT(vz, vx, vy, gvl);
                        v_res = VFREDSUM_FLOAT(v_res, vr, v_z0, gvl);
                        dot += v_res[0];
                }
        }
	return(dot);
}