OpenBLAS/kernel/riscv64/scal_vector.c

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#include "common.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)
#define VFMVVF_FLOAT    JOIN(RISCV_RVV(vfmv),      _v_f_f, ELEN,   LMUL,   _)
#define VFMULVF_FLOAT   JOIN(RISCV_RVV(vfmul),     _vf_f,  ELEN,   LMUL,   _)

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){
                        BLASLONG stride_x = inc_x * sizeof(FLOAT);
                        BLASLONG ix = 0;
                        gvl = VSETVL(n);
                        v0 = VFMVVF_FLOAT(0, gvl);

                        for(i = 0; i < n/(gvl*2); ++i ){
                                VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);
                                ix += inc_x * gvl;
                                VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);
                                ix += inc_x * gvl;
                        }

                        i *= gvl*2;
                        while( i < n ){
                                gvl = VSETVL(n-i);
                                v0 = VFMVVF_FLOAT(0, gvl);
                                VSSEV_FLOAT(&x[ix], stride_x, v0, gvl);
                                i += 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;
}