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its contributors may be used to endorse or promote products
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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*****************************************************************************/

#include "common.h"
#include <stdio.h>

#ifdef RISCV64_ZVL256B
#       define LMUL m2
#       if defined(DOUBLE)
#               define ELEN 64
#               define MLEN 32
#       else
#               define ELEN 32
#               define MLEN 16
#       endif
#else
#       define LMUL m8
#       if defined(DOUBLE)
#               define ELEN 64
#               define MLEN 8
#       else
#               define ELEN 32
#               define MLEN 4
#       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_RVV(vsetvl),    _e,     ELEN,   LMUL,   _)
#define FLOAT_V_T       JOIN(vfloat,            ELEN,   LMUL,   _t,     _)
#define VLEV_FLOAT      JOIN(RISCV_RVV(vle),       ELEN,   _v_f,   ELEN,   LMUL)
#define VLSEV_FLOAT     JOIN(RISCV_RVV(vlse),      ELEN,   _v_f,   ELEN,   LMUL)
#define VSEV_FLOAT      JOIN(RISCV_RVV(vse),       ELEN,   _v_f,   ELEN,   LMUL)
#define VSSEV_FLOAT     JOIN(RISCV_RVV(vsse),      ELEN,   _v_f,   ELEN,   LMUL)

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT dummy3, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{
	BLASLONG i = 0, j = 0;
	BLASLONG ix = 0,iy = 0;
        BLASLONG stride_x, stride_y;
        FLOAT_V_T vx0, vx1, vy0, vy1;

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

        unsigned int gvl = VSETVL((inc_x != 0 && inc_y != 0) ? n : 1);
        if( inc_x == 0 && inc_y == 0 ) { n = n & 1; }

        if(inc_x == 1 && inc_y == 1){
                if(gvl <= n/2){
                        for(i=0,j=0; i<n/(2*gvl); i++){
                                vx0 = VLEV_FLOAT(&x[j], gvl);
                                vy0 = VLEV_FLOAT(&y[j], gvl);
                                VSEV_FLOAT(&x[j], vy0, gvl);
                                VSEV_FLOAT(&y[j], vx0, gvl);

                                vx1 = VLEV_FLOAT(&x[j+gvl], gvl);
                                vy1 = VLEV_FLOAT(&y[j+gvl], gvl);
                                VSEV_FLOAT(&x[j+gvl], vy1, gvl);
                                VSEV_FLOAT(&y[j+gvl], vx1, gvl);
                                j+=gvl * 2;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        vx0 = VLEV_FLOAT(&x[j], gvl);
                        vy0 = VLEV_FLOAT(&y[j], gvl);
                        VSEV_FLOAT(&x[j], vy0, gvl);
                        VSEV_FLOAT(&y[j], vx0, gvl);
                        j+=gvl;
                }
        }else if (inc_y == 1){
                stride_x = inc_x * sizeof(FLOAT);
                if(gvl <= n/2){
                        BLASLONG inc_xv = inc_x * gvl;
                        for(i=0,j=0; i<n/(2*gvl); i++){
                                vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                                vy0 = VLEV_FLOAT(&y[j], gvl);
                                VSSEV_FLOAT(&x[ix], stride_x, vy0, gvl);
                                VSEV_FLOAT(&y[j], vx0, gvl);

                                vx1 = VLSEV_FLOAT(&x[ix+inc_xv], stride_x, gvl);
                                vy1 = VLEV_FLOAT(&y[j+gvl], gvl);
                                VSSEV_FLOAT(&x[ix+inc_xv], stride_x, vy1, gvl);
                                VSEV_FLOAT(&y[j+gvl], vx1, gvl);
                                j += gvl * 2;
                                ix += inc_xv * 2;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                        vy0 = VLEV_FLOAT(&y[j], gvl);
                        VSSEV_FLOAT(&x[ix], stride_x, vy0, gvl);
                        VSEV_FLOAT(&y[j], vx0, gvl);
                        j += gvl;
                        ix += inc_x * gvl;
                }
        }else if(inc_x == 1){
                stride_y = inc_y * sizeof(FLOAT);
                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[iy], stride_y, gvl);
                                VSEV_FLOAT(&x[j], vy0, gvl);
                                VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);

                                vx1 = VLEV_FLOAT(&x[j+gvl], gvl);
                                vy1 = VLSEV_FLOAT(&y[iy+inc_yv], stride_y, gvl);
                                VSEV_FLOAT(&x[j+gvl], vy1, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv], stride_y, vx1, gvl);
                                j += gvl * 2;
                                iy += inc_yv * 2;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        vx0 = VLEV_FLOAT(&x[j], gvl);
                        vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                        VSEV_FLOAT(&x[j], vy0, gvl);
                        VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);
                        j += gvl;
                        iy += inc_y * gvl;
                }
        }else{
                stride_x = inc_x * sizeof(FLOAT);
                stride_y = inc_y * sizeof(FLOAT);
                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[ix], stride_x, gvl);
                                vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                                VSSEV_FLOAT(&x[ix], stride_x, vy0, gvl);
                                VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);

                                vx1 = VLSEV_FLOAT(&x[ix+inc_xv], stride_x, gvl);
                                vy1 = VLSEV_FLOAT(&y[iy+inc_yv], stride_y, gvl);
                                VSSEV_FLOAT(&x[ix+inc_xv], stride_x, vy1, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv], stride_y, vx1, gvl);
                                j += gvl * 2;
                                ix += inc_xv * 2;
                                iy += inc_yv * 2;
                        }
                }
                for(;j<n;){
                        gvl = VSETVL(n-j);
                        vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                        vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                        VSSEV_FLOAT(&x[ix], stride_x, vy0, gvl);
                        VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);
                        j += gvl;
                        ix += inc_x * gvl;
                        iy += inc_y * gvl;
                }
        }
	return(0);
}


