OpenBLAS/kernel/riscv64/gemv_n_vector.c

/***************************************************************************
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#include "common.h"
#if !defined(DOUBLE)
#define VSETVL(n) RISCV_RVV(vsetvl_e32m8)(n)
#define FLOAT_V_T vfloat32m8_t
#define VLEV_FLOAT RISCV_RVV(vle32_v_f32m8)
#define VLSEV_FLOAT RISCV_RVV(vlse32_v_f32m8)
#define VSEV_FLOAT RISCV_RVV(vse32_v_f32m8)
#define VSSEV_FLOAT RISCV_RVV(vsse32_v_f32m8)
#define VFMACCVF_FLOAT RISCV_RVV(vfmacc_vf_f32m8)
#define VFMUL_VF_FLOAT RISCV_RVV(vfmul_vf_f32m8)
#define VFILL_ZERO_FLOAT RISCV_RVV(vfsub_vv_f32m8)
#else
#define VSETVL(n) RISCV_RVV(vsetvl_e64m4)(n)
#define FLOAT_V_T vfloat64m4_t
#define VLEV_FLOAT RISCV_RVV(vle64_v_f64m4)
#define VLSEV_FLOAT RISCV_RVV(vlse64_v_f64m4)
#define VSEV_FLOAT RISCV_RVV(vse64_v_f64m4)
#define VSSEV_FLOAT RISCV_RVV(vsse64_v_f64m4)
#define VFMACCVF_FLOAT RISCV_RVV(vfmacc_vf_f64m4)
#define VFMUL_VF_FLOAT RISCV_RVV(vfmul_vf_f64m4)
#define VFILL_ZERO_FLOAT RISCV_RVV(vfsub_vv_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[4];
    FLOAT_V_T va0, va1, vy0, vy1,vy0_temp, vy1_temp , temp_v ,va0_0 , va0_1 , va1_0 ,va1_1 ,va2_0 ,va2_1 ,va3_0 ,va3_1 ;
    unsigned int gvl = 0;
    if(inc_y == 1 && inc_x == 1){
        gvl = VSETVL(m);
        if(gvl <= m/2){
            for(k=0,j=0; k<m/(2*gvl); k++){
                a_ptr = a;
                ix = 0;
                vy0_temp = VLEV_FLOAT(&y[j], gvl);
                vy1_temp = VLEV_FLOAT(&y[j+gvl], gvl);
                vy0 = VFILL_ZERO_FLOAT(vy0 , vy0 , gvl);
                vy1 = VFILL_ZERO_FLOAT(vy1 , vy1 , gvl);
                int i;

                int remainder = n % 4;
                for(i = 0; i < remainder; i++){
                    temp[0] = x[ix];
                    va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                    vy0 = VFMACCVF_FLOAT(vy0, temp[0], va0, gvl);

                    va1 = VLEV_FLOAT(&a_ptr[j+gvl], gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, temp[0], va1, gvl);
                    a_ptr += lda;
                    ix ++;
                }

                for(i = remainder; i < n; i += 4){
                    va0_0 = VLEV_FLOAT(&(a_ptr)[j], gvl);
                    va0_1 = VLEV_FLOAT(&(a_ptr)[j+gvl], gvl);
                    va1_0 = VLEV_FLOAT(&(a_ptr+lda * 1)[j], gvl);
                    va1_1 = VLEV_FLOAT(&(a_ptr+lda * 1)[j+gvl], gvl);
                    va2_0 = VLEV_FLOAT(&(a_ptr+lda * 2)[j], gvl);
                    va2_1 = VLEV_FLOAT(&(a_ptr+lda * 2)[j+gvl], gvl);
                    va3_0 = VLEV_FLOAT(&(a_ptr+lda * 3)[j], gvl);
                    va3_1 = VLEV_FLOAT(&(a_ptr+lda * 3)[j+gvl], gvl);

                    vy0 = VFMACCVF_FLOAT(vy0, x[ix], va0_0, gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, x[ix], va0_1, gvl);

                    vy0 = VFMACCVF_FLOAT(vy0, x[ix+1], va1_0, gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, x[ix+1], va1_1, gvl);

                    vy0 = VFMACCVF_FLOAT(vy0, x[ix+2], va2_0, gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, x[ix+2], va2_1, gvl);

                    vy0 = VFMACCVF_FLOAT(vy0, x[ix+3], va3_0, gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, x[ix+3], va3_1, gvl);
                    a_ptr += 4 * lda;
                    ix +=4;
                }
                vy0 = VFMACCVF_FLOAT(vy0_temp, alpha, vy0, gvl);
                vy1 = VFMACCVF_FLOAT(vy1_temp, alpha, vy1, gvl);
                VSEV_FLOAT(&y[j], vy0, gvl);
                VSEV_FLOAT(&y[j+gvl], vy1, gvl);
                j += gvl * 2;
            }
        }
        //tail
		if(gvl <= m - j ){
			a_ptr = a;
			ix = 0;
			vy0_temp = VLEV_FLOAT(&y[j], gvl);
			vy0 = VFILL_ZERO_FLOAT(vy0 , vy0 , gvl);
			int i;

			int remainder = n % 4;
			for(i = 0; i < remainder; i++){
				temp[0] = x[ix];
				va0 = VLEV_FLOAT(&a_ptr[j], gvl);
				vy0 = VFMACCVF_FLOAT(vy0, temp[0], va0, gvl);
				a_ptr += lda;
				ix ++;
			}

			for(i = remainder; i < n; i += 4){
				va0_0 = VLEV_FLOAT(&(a_ptr)[j], gvl);			
				va1_0 = VLEV_FLOAT(&(a_ptr+lda * 1)[j], gvl);		
				va2_0 = VLEV_FLOAT(&(a_ptr+lda * 2)[j], gvl);	
				va3_0 = VLEV_FLOAT(&(a_ptr+lda * 3)[j], gvl);
				vy0 = VFMACCVF_FLOAT(vy0, x[ix], va0_0, gvl);
				vy0 = VFMACCVF_FLOAT(vy0, x[ix+1], va1_0, gvl);
				vy0 = VFMACCVF_FLOAT(vy0, x[ix+2], va2_0, gvl);
				vy0 = VFMACCVF_FLOAT(vy0, x[ix+3], va3_0, gvl);
				a_ptr += 4 * lda;
				ix +=4;
			}
			vy0 = VFMACCVF_FLOAT(vy0_temp, alpha, vy0, gvl);
		
			VSEV_FLOAT(&y[j], vy0, gvl);
			
			j += gvl ;
        }
		

        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[0] = alpha * x[ix];
                va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                vy0 = VFMACCVF_FLOAT(vy0, temp[0], va0, gvl);

                a_ptr += lda;
                ix += inc_x;
            }
            VSEV_FLOAT(&y[j], vy0, gvl);
            j += gvl;
        }
    }else if (inc_y == 1 && inc_x !=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[0] = alpha * x[ix];
                    va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                    vy0 = VFMACCVF_FLOAT(vy0, temp[0], va0, gvl);

                    va1 = VLEV_FLOAT(&a_ptr[j+gvl], gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, temp[0], 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[0] = alpha * x[ix];
                va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                vy0 = VFMACCVF_FLOAT(vy0, temp[0], 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[0] = alpha * x[ix];
                    va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                    vy0 = VFMACCVF_FLOAT(vy0, temp[0], va0, gvl);

                    va1 = VLEV_FLOAT(&a_ptr[j+gvl], gvl);
                    vy1 = VFMACCVF_FLOAT(vy1, temp[0], 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[0] = alpha * x[ix];
                va0 = VLEV_FLOAT(&a_ptr[j], gvl);
                vy0 = VFMACCVF_FLOAT(vy0, temp[0], va0, gvl);

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