OpenBLAS/kernel/riscv64/zcopy_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 VLSEV_FLOAT vlsev_float32xm4
#define VSSEV_FLOAT vssev_float32xm4
#else
#define RVV_EFLOAT RVV_E64
#define RVV_M RVV_M4
#define FLOAT_V_T float64xm4_t
#define VLSEV_FLOAT vlsev_float64xm4
#define VSSEV_FLOAT vssev_float64xm4
#endif


int CNAME(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y)
{
	BLASLONG i = 0, j = 0;
	BLASLONG ix = 0,iy = 0;
	if(n < 0) return(0);

        unsigned int gvl = 0;
        if(inc_x == 1 && inc_y == 1){
                memcpy(&y[0], &x[0], n * 2 * sizeof(FLOAT));
        }else{
                FLOAT_V_T vx0, vx1, vx2, vx3;
                gvl = vsetvli(n, RVV_EFLOAT, RVV_M);
                BLASLONG stride_x = inc_x * 2 * sizeof(FLOAT);
                BLASLONG stride_y = inc_y * 2 * sizeof(FLOAT);
                if(gvl <= n/2){
                        BLASLONG inc_xv = inc_x * gvl * 2;
                        BLASLONG inc_yv = inc_y * gvl * 2;
                        for(i=0,j=0; i < n/(2*gvl); i++){
                                vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                                vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                                VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);
                                VSSEV_FLOAT(&y[iy+1], stride_y, vx1, gvl);

                                vx2 = VLSEV_FLOAT(&x[ix+inc_xv], stride_x, gvl);
                                vx3 = VLSEV_FLOAT(&x[ix+1+inc_xv], stride_x, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv], stride_y, vx2, gvl);
                                VSSEV_FLOAT(&y[iy+1+inc_yv], stride_y, vx3, gvl);

                                j += gvl * 2;
                                ix += inc_xv * 2;
                                iy += inc_yv * 2;
                        }
                }
                for(;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);
                        VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);
                        VSSEV_FLOAT(&y[iy+1], stride_y, vx1, gvl);

                        j += gvl;
                        ix += inc_x * 2 * gvl;
                        iy += inc_y * 2 * gvl;
                }
        }
	return(0);
}