OpenBLAS/kernel/riscv64/copy_vector.c

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

#ifdef RISCV64_ZVL256B
#       define LMUL m2
#       if defined(DOUBLE)
#               define ELEN 64
#       else
#               define ELEN 32
#       endif
#else
#       define LMUL m8
#       if defined(DOUBLE)
#               define ELEN 64
#       else
#               define ELEN 32
#       endif
#endif

#define _
#define JOIN2_X(x, y) x ## y
#define JOIN2(x, y) JOIN2_X(x, y)
#define JOIN(v, w, x, y, z) JOIN2( JOIN2( JOIN2( JOIN2( v, w ), x), y), z)

#define VSETVL          JOIN(__riscv_vsetvl,    _e,     ELEN,   LMUL,   _)
#define FLOAT_V_T       JOIN(vfloat,            ELEN,   LMUL,   _t,     _)
#define VLEV_FLOAT      JOIN(__riscv_vle,       ELEN,   _v_f,   ELEN,   LMUL)
#define VLSEV_FLOAT     JOIN(__riscv_vlse,      ELEN,   _v_f,   ELEN,   LMUL)
#define VSEV_FLOAT      JOIN(__riscv_vse,       ELEN,   _v_f,   ELEN,   LMUL)
#define VSSEV_FLOAT     JOIN(__riscv_vsse,      ELEN,   _v_f,   ELEN,   LMUL)

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);

        BLASLONG stride_x, stride_y;
        FLOAT_V_T v0, v1, v2, v3;
        unsigned int gvl = 0;

        if(inc_x == 1 && inc_y == 1){
                memcpy(&y[0], &x[0], n*sizeof(FLOAT));
        }else if (inc_y == 1){
                gvl = VSETVL(n);
                stride_x = inc_x * sizeof(FLOAT);
                if(gvl <= n/4){
                        BLASLONG inc_xv = inc_x * gvl;
                        BLASLONG gvl3 = gvl * 3;
                        BLASLONG inc_xv3 = inc_xv * 3;
                        for(i=0,j=0; i<n/(4*gvl); i++){
                                v0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                                VSEV_FLOAT(&y[j], v0, gvl);
                                v1 = VLSEV_FLOAT(&x[ix+inc_xv], stride_x, gvl);
                                VSEV_FLOAT(&y[j+gvl], v1, gvl);

                                v2 = VLSEV_FLOAT(&x[ix+inc_xv*2], stride_x, gvl);
                                VSEV_FLOAT(&y[j+gvl*2], v2, gvl);
                                v3 = VLSEV_FLOAT(&x[ix+inc_xv3], stride_x, gvl);
                                VSEV_FLOAT(&y[j+gvl3], v3, gvl);
                                j += gvl * 4;
                                ix += inc_xv * 4;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        v0 = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
                        VSEV_FLOAT(&y[j], v0, gvl);
                        j += gvl;
                }
        }else if(inc_x == 1){
                gvl = VSETVL(n);
                stride_y = inc_y * sizeof(FLOAT);
                if(gvl <= n/4){
                        BLASLONG inc_yv = inc_y * gvl;
                        BLASLONG inc_yv3 = inc_yv * 3;
                        BLASLONG gvl3 = gvl * 3;
                        for(i=0,j=0; i<n/(4*gvl); i++){
                                v0 = VLEV_FLOAT(&x[j], gvl);
                                VSSEV_FLOAT(&y[iy], stride_y, v0, gvl);
                                v1 = VLEV_FLOAT(&x[j+gvl], gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv], stride_y, v1, gvl);

                                v2 = VLEV_FLOAT(&x[j+gvl*2], gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv*2], stride_y, v2, gvl);
                                v3 = VLEV_FLOAT(&x[j+gvl3], gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv3], stride_y, v3, gvl);
                                j += gvl * 4;
                                iy += inc_yv * 4;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        v0 = VLEV_FLOAT(&x[j], gvl);
                        VSSEV_FLOAT(&y[j*inc_y], stride_y, v0, gvl);
                        j += gvl;
                }

        }else{
                gvl = VSETVL(n);
                stride_x = inc_x * sizeof(FLOAT);
                stride_y = inc_y * sizeof(FLOAT);
                if(gvl <= n/4){
                        BLASLONG inc_xv = inc_x * gvl;
                        BLASLONG inc_yv = inc_y * gvl;
                        BLASLONG inc_xv3 = inc_xv * 3;
                        BLASLONG inc_yv3 = inc_yv * 3;
                        for(i=0,j=0; i<n/(4*gvl); i++){
                                v0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                                VSSEV_FLOAT(&y[iy], stride_y, v0, gvl);
                                v1 = VLSEV_FLOAT(&x[ix+inc_xv], stride_x, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv], stride_y, v1, gvl);

                                v2 = VLSEV_FLOAT(&x[ix+inc_xv*2], stride_x, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv*2], stride_y, v2, gvl);
                                v3 = VLSEV_FLOAT(&x[ix+inc_xv3], stride_x, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv3], stride_y, v3, gvl);

                                j += gvl * 4;
                                ix += inc_xv * 4;
                                iy += inc_yv * 4;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        v0 = VLSEV_FLOAT(&x[j*inc_x], stride_x, gvl);
                        VSSEV_FLOAT(&y[j*inc_y], stride_y, v0, gvl);
                        j += gvl;
                }
        }
	return(0);
}