OpenBLAS/kernel/riscv64/gemv_n_vector.c

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#include "common.h"
#if !defined(DOUBLE)
#define VSETVL(n) __riscv_vsetvl_e32m4(n)
#define FLOAT_V_T vfloat32m4_t
#define VLEV_FLOAT __riscv_vle32_v_f32m4
#define VLSEV_FLOAT __riscv_vlse32_v_f32m4
#define VSEV_FLOAT __riscv_vse32_v_f32m4
#define VSSEV_FLOAT __riscv_vsse32_v_f32m4
#define VFMACCVF_FLOAT __riscv_vfmacc_vf_f32m4
#else
#define VSETVL(n) __riscv_vsetvl_e64m4(n)
#define FLOAT_V_T vfloat64m4_t
#define VLEV_FLOAT __riscv_vle64_v_f64m4
#define VLSEV_FLOAT __riscv_vlse64_v_f64m4
#define VSEV_FLOAT __riscv_vse64_v_f64m4
#define VSSEV_FLOAT __riscv_vsse64_v_f64m4
#define VFMACCVF_FLOAT __riscv_vfmacc_vf_f64m4
#endif

int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *buffer)
{
	BLASLONG i = 0, j = 0, k = 0;
        BLASLONG ix = 0, iy = 0;

	if(n < 0)  return(0);
        FLOAT *a_ptr = a;
        FLOAT temp = 0.0;
        FLOAT_V_T va0, va1, vy0, vy1;
        unsigned int gvl = 0;
        if(inc_y == 1){
                gvl = VSETVL(m);
                if(gvl <= m/2){
                        for(k=0,j=0; k<m/(2*gvl); k++){
                                a_ptr = a;
                                ix = 0;
                                vy0 = VLEV_FLOAT(&y[j], gvl);
                                vy1 = VLEV_FLOAT(&y[j+gvl], gvl);
                                for(i = 0; i < n; i++){
                                        temp = alpha * x[ix];
                                        va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                                        vy0 = VFMACCVF_FLOAT(vy0, temp, va0, gvl);

                                        va1 = VLEV_FLOAT(&a_ptr[j+gvl], gvl);
                                        vy1 = VFMACCVF_FLOAT(vy1, temp, va1, gvl);
                                        a_ptr += lda;
                                        ix += inc_x;
                                }
                                VSEV_FLOAT(&y[j], vy0, gvl);
                                VSEV_FLOAT(&y[j+gvl], vy1, gvl);
                                j += gvl * 2;
                        }
                }
                //tail
                for(;j < m;){
                        gvl = VSETVL(m-j);
                        a_ptr = a;
                        ix = 0;
                        vy0 = VLEV_FLOAT(&y[j], gvl);
                        for(i = 0; i < n; i++){
                                temp = alpha * x[ix];
                                va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                                vy0 = VFMACCVF_FLOAT(vy0, temp, va0, gvl);

                                a_ptr += lda;
                                ix += inc_x;
                        }
                        VSEV_FLOAT(&y[j], vy0, gvl);
                        j += gvl;
                }
        }else{
                BLASLONG stride_y = inc_y * sizeof(FLOAT);
                gvl = VSETVL(m);
                if(gvl <= m/2){
                        BLASLONG inc_yv = inc_y * gvl;
                        for(k=0,j=0; k<m/(2*gvl); k++){
                                a_ptr = a;
                                ix = 0;
                                vy0 = VLSEV_FLOAT(&y[iy], stride_y, gvl);
                                vy1 = VLSEV_FLOAT(&y[iy+inc_yv], stride_y, gvl);
                                for(i = 0; i < n; i++){
                                        temp = alpha * x[ix];
                                        va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                                        vy0 = VFMACCVF_FLOAT(vy0, temp, va0, gvl);

                                        va1 = VLEV_FLOAT(&a_ptr[j+gvl], gvl);
                                        vy1 = VFMACCVF_FLOAT(vy1, temp, va1, gvl);
                                        a_ptr += lda;
                                        ix += inc_x;
                                }
                                VSSEV_FLOAT(&y[iy], stride_y, vy0, gvl);
                                VSSEV_FLOAT(&y[iy+inc_yv], stride_y, vy1, gvl);
                                j += gvl * 2;
                                iy += inc_yv * 2;
                        }
                }
                //tail
                for(;j < m;){
                        gvl = VSETVL(m-j);
                        a_ptr = a;
                        ix = 0;
                        vy0 = VLSEV_FLOAT(&y[j*inc_y], stride_y, gvl);
                        for(i = 0; i < n; i++){
                                temp = alpha * x[ix];
                                va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                                vy0 = VFMACCVF_FLOAT(vy0, temp, va0, gvl);

                                a_ptr += lda;
                                ix += inc_x;
                        }
                        VSSEV_FLOAT(&y[j*inc_y], stride_y, vy0, gvl);
                        j += gvl;
                }
        }
	return(0);
}