OpenBLAS/kernel/riscv64/axpy_vector.c

/***************************************************************************
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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n) vsetvl_e32m4(n)
#define FLOAT_V_T vfloat32m4_t
#define VLEV_FLOAT vle_v_f32m4
#define VLSEV_FLOAT vlse_v_f32m4
#define VSEV_FLOAT vse_v_f32m4
#define VSSEV_FLOAT vsse_v_f32m4
#define VFMACCVF_FLOAT vfmacc_vf_f32m4
#else
#define VSETVL(n) vsetvl_e64m4(n)
#define FLOAT_V_T vfloat64m4_t
#define VLEV_FLOAT vle_v_f64m4
#define VLSEV_FLOAT vlse_v_f64m4
#define VSEV_FLOAT vse_v_f64m4
#define VSSEV_FLOAT vsse_v_f64m4
#define VFMACCVF_FLOAT vfmacc_vf_f64m4
#endif

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{
	BLASLONG i=0, j=0, jx=0, jy=0;
	unsigned int gvl = 0;
	FLOAT_V_T vx0, vx1;
	FLOAT_V_T vy0, vy1;
	BLASLONG stride_x, stride_y;

	if (n < 0)  return(0);
	if (da == 0.0) return(0);

	if (inc_x == 1 && inc_y == 1) {

		gvl = VSETVL(n);

		if (gvl <= n/2) {
			for (i = 0, j=0; i < n/(2*gvl); i++, j+=2*gvl) {
				vx0 = VLEV_FLOAT(&x[j], gvl);
				vy0 = VLEV_FLOAT(&y[j], gvl);
				vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
				VSEV_FLOAT(&y[j], vy0, gvl);

				vx1 = VLEV_FLOAT(&x[j+gvl], gvl);
				vy1 = VLEV_FLOAT(&y[j+gvl], gvl);
				vy1 = VFMACCVF_FLOAT(vy1, da, vx1, gvl);
				VSEV_FLOAT(&y[j+gvl], vy1, gvl);
			}
		}
		//tail
		for (; j < n; ) {
			gvl = VSETVL(n - j);
			vx0 = VLEV_FLOAT(&x[j], gvl);
			vy0 = VLEV_FLOAT(&y[j], gvl);
			vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
			VSEV_FLOAT(&y[j], vy0, gvl);

			j += gvl;
		}
	}else if (inc_y == 1) {
		stride_x = inc_x * sizeof(FLOAT);
                gvl = VSETVL(n);
                if(gvl <= n/2){
                        BLASLONG inc_xv = inc_x * gvl;
                        for(i=0,j=0; i<n/(2*gvl); i++){
			        vx0 = VLSEV_FLOAT(&x[jx], stride_x, gvl);
                                vy0 = VLEV_FLOAT(&y[j], gvl);
                                vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
                                VSEV_FLOAT(&y[j], vy0, gvl);

			        vx1 = VLSEV_FLOAT(&x[jx+inc_xv], stride_x, gvl);
                                vy1 = VLEV_FLOAT(&y[j+gvl], gvl);
                                vy1 = VFMACCVF_FLOAT(vy1, da, vx1, gvl);
                                VSEV_FLOAT(&y[j+gvl], vy1, gvl);

                                j += gvl * 2;
                                jx += inc_xv * 2;
                        }
                }
		for (; j<n; ) {
			gvl = VSETVL(n - j);
			vx0 = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
			vy0 = VLEV_FLOAT(&y[j], gvl);
			vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
			VSEV_FLOAT(&y[j], vy0, gvl);
			j += gvl;
		}
        }else if(inc_x == 1){
		stride_y = inc_y * sizeof(FLOAT);
                gvl = VSETVL(n);
                if(gvl <= n/2){
                        BLASLONG inc_yv = inc_y * gvl;
                        for(i=0,j=0; i<n/(2*gvl); i++){
			        vx0 = VLEV_FLOAT(&x[j], gvl);
                                vy0 = VLSEV_FLOAT(&y[jy], stride_y, gvl);
                                vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
                                VSSEV_FLOAT(&y[jy], stride_y, vy0, gvl);

			        vx1 = VLEV_FLOAT(&x[j+gvl], gvl);
                                vy1 = VLSEV_FLOAT(&y[jy+inc_yv], stride_y, gvl);
                                vy1 = VFMACCVF_FLOAT(vy1, da, vx1, gvl);
                                VSSEV_FLOAT(&y[jy+inc_yv], stride_y, vy1, gvl);

                                j += gvl * 2;
                                jy += inc_yv * 2;
                        }
                }
		for (; j<n; ) {
			gvl = VSETVL(n - j);
			vx0 = VLEV_FLOAT(&x[j], gvl);
			vy0 = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
			vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
			VSSEV_FLOAT(&y[j*inc_y], stride_y, vy0, gvl);
			j += gvl;
		}
	}else{
		stride_x = inc_x * sizeof(FLOAT);
		stride_y = inc_y * sizeof(FLOAT);
                gvl = VSETVL(n);
                if(gvl <= n/2){
                        BLASLONG inc_xv = inc_x * gvl;
                        BLASLONG inc_yv = inc_y * gvl;
                        for(i=0,j=0; i<n/(2*gvl); i++){
			        vx0 = VLSEV_FLOAT(&x[jx], stride_x, gvl);
                                vy0 = VLSEV_FLOAT(&y[jy], stride_y, gvl);
                                vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
                                VSSEV_FLOAT(&y[jy], stride_y, vy0, gvl);

			        vx1 = VLSEV_FLOAT(&x[jx+inc_xv], stride_x, gvl);
                                vy1 = VLSEV_FLOAT(&y[jy+inc_yv], stride_y, gvl);
                                vy1 = VFMACCVF_FLOAT(vy1, da, vx1, gvl);
                                VSSEV_FLOAT(&y[jy+inc_yv], stride_y, vy1, gvl);

                                j += gvl * 2;
                                jx += inc_xv * 2;
                                jy += inc_yv * 2;
                        }
                }
		for (; j<n; ) {
			gvl = VSETVL(n - j);
			vx0 = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
			vy0 = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
			vy0 = VFMACCVF_FLOAT(vy0, da, vx0, gvl);
			VSSEV_FLOAT(&y[j*inc_y], stride_y, vy0, gvl);
			j += gvl;
		}
	}
	return(0);
}