OpenBLAS/kernel/riscv64/scal_vector.c

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#include "common.h"
#if !defined(DOUBLE)
#define VSETVL(n) vsetvl_e32m8(n)
#define VSETVL_MAX vsetvlmax_e32m1()
#define FLOAT_V_T vfloat32m8_t
#define VLEV_FLOAT vle32_v_f32m8
#define VLSEV_FLOAT vlse32_v_f32m8
#define VSEV_FLOAT vse32_v_f32m8
#define VSSEV_FLOAT vsse32_v_f32m8
#define VFMULVF_FLOAT vfmul_vf_f32m8
#define VFMVVF_FLOAT vfmv_v_f_f32m8
#else
#define VSETVL(n) vsetvl_e64m8(n)
#define VSETVL_MAX vsetvlmax_e64m1()
#define FLOAT_V_T vfloat64m8_t
#define VLEV_FLOAT vle64_v_f64m8
#define VLSEV_FLOAT vlse64_v_f64m8
#define VSEV_FLOAT vse64_v_f64m8
#define VSSEV_FLOAT vsse64_v_f64m8
#define VFMULVF_FLOAT vfmul_vf_f64m8
#define VFMVVF_FLOAT vfmv_v_f_f64m8
#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;

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

        FLOAT_V_T v0, v1;
        unsigned int gvl = 0;
        if(inc_x == 1){
                if(da == 0.0){
                        memset(&x[0], 0, n * sizeof(FLOAT));
                }else{
                        gvl = VSETVL(n);
                        if(gvl <= n / 2){
                                for(i = 0, j = 0; i < n/(2*gvl); i++, j+=2*gvl){
                                        v0 = VLEV_FLOAT(&x[j], gvl);
                                        v0 = VFMULVF_FLOAT(v0, da,gvl);
                                        VSEV_FLOAT(&x[j], v0, gvl);

                                        v1 = VLEV_FLOAT(&x[j+gvl], gvl);
                                        v1 = VFMULVF_FLOAT(v1, da, gvl);
                                        VSEV_FLOAT(&x[j+gvl], v1, gvl);
                                }
                        }
                        //tail
                        for(; j <n; ){
                                gvl = VSETVL(n-j);
                                v0 = VLEV_FLOAT(&x[j], gvl);
                                v0 = VFMULVF_FLOAT(v0, da, gvl);
                                VSEV_FLOAT(&x[j], v0, gvl);
                                j += gvl;
                        }
                }
        }else{
                if(da == 0.0){
                        gvl = VSETVL(n);
						BLASLONG stride_x = inc_x * sizeof(FLOAT);
						BLASLONG ix = 0;
                        if(gvl <= n / 2){
							    long int inc_xv = gvl * inc_x;
                                v0 = VFMVVF_FLOAT(0, gvl);
                                for(i = 0, j = 0; i < n/(2*gvl); i++, j+=2*gvl){
									VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);
									VSSEV_FLOAT(&x[ix + inc_xv], stride_x, v0, gvl);
									ix += inc_xv * 2;
                                }
                        }
                        //tail
                        for(; j <n; ){
                                gvl = VSETVL(n-j);
                                v0 = VFMVVF_FLOAT(0, gvl);
								VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);
                                j += gvl;
								ix += inc_x * gvl;
                        }
                }else{
                        gvl = VSETVL(n);
                        BLASLONG stride_x = inc_x * sizeof(FLOAT);
                        BLASLONG ix = 0;
                        if(gvl < n / 2){
                                BLASLONG inc_xv = gvl * inc_x;
                                for(i = 0, j = 0; i < n/(2*gvl); i++, j+=2*gvl){
                                        v0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                                        v0 = VFMULVF_FLOAT(v0, da,gvl);
                                        VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);

                                        v1 = VLSEV_FLOAT(&x[ix+inc_xv], stride_x, gvl);
                                        v1 = VFMULVF_FLOAT(v1, da, gvl);
                                        VSSEV_FLOAT(&x[ix+inc_xv], stride_x, v1, gvl);
                                        ix += inc_xv * 2;
                                }
                        }
                        //tail
                        for(; j <n; ){
                                gvl = VSETVL(n-j);
                                v0 = VLSEV_FLOAT(&x[ix], stride_x, gvl);
                                v0 = VFMULVF_FLOAT(v0, da, gvl);
                                VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);
                                j += gvl;
                                ix += inc_x * gvl;
                        }
                }
        }
	return 0;
}