OpenBLAS/kernel/riscv64/zswap_vector.c

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#include "common.h"
#include <stdio.h>
#if !defined(DOUBLE)
#define VSETVL(n) vsetvl_e32m8(n)
#define VSETVL_MAX vsetvlmax_e32m1()
#define FLOAT_V_T vfloat32m8_t
#define VLEV_FLOAT vle_v_f32m8
#define VLSEV_FLOAT vlse_v_f32m8
#define VSEV_FLOAT vse_v_f32m8
#define VSSEV_FLOAT vsse_v_f32m8
#else
#define VSETVL(n) vsetvl_e64m8(n)
#define VSETVL_MAX vsetvlmax_e64m1()
#define FLOAT_V_T vfloat64m8_t
#define VLEV_FLOAT vle_v_f64m8
#define VLSEV_FLOAT vlse_v_f64m8
#define VSEV_FLOAT vse_v_f64m8
#define VSSEV_FLOAT vsse_v_f64m8
#endif

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT dummy3, FLOAT dummy4, 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;
        unsigned int gvl = 0;

	if (n < 0)  return(0);
        if(inc_x == 1 && inc_y == 1){
                gvl = VSETVL(n);
                BLASLONG n2 = n * 2;
                if(gvl <= n2/2){
                        for(i=0,j=0; i<n2/(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<n2;){
                        gvl = VSETVL(n2-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{
                gvl = VSETVL(n);
                stride_x = inc_x * 2 * sizeof(FLOAT);
                stride_y = inc_y * 2 * sizeof(FLOAT);
                BLASLONG inc_xv = inc_x * gvl * 2;
                BLASLONG inc_yv = inc_y * gvl * 2;
                for(i=0,j=0; i<n/gvl; i++){
                        vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                        vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                        vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                        vy1 = VLSEV_FLOAT(&y[iy+1], stride_y, gvl);
                        VSSEV_FLOAT(&x[ix], stride_x, vy0, gvl);
                        VSSEV_FLOAT(&x[ix+1], stride_x, vy1, gvl);
                        VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);
                        VSSEV_FLOAT(&y[iy+1], stride_y, vx1, gvl);

                        j += gvl;
                        ix += inc_xv;
                        iy += inc_yv;
                }
                if(j < n){
                        gvl = VSETVL(n-j);
                        vx0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                        vx1 = VLSEV_FLOAT(&x[ix+1], stride_x, gvl);
                        vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                        vy1 = VLSEV_FLOAT(&y[iy+1], stride_y, gvl);
                        VSSEV_FLOAT(&x[ix], stride_x, vy0, gvl);
                        VSSEV_FLOAT(&x[ix+1], stride_x, vy1, gvl);
                        VSSEV_FLOAT(&y[iy], stride_y, vx0, gvl);
                        VSSEV_FLOAT(&y[iy+1], stride_y, vx1, gvl);
                }
        }
	return(0);
}