OpenBLAS/kernel/riscv64/gemv_n_rvv.c

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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n)               __riscv_vsetvl_e32m8(n)
#define FLOAT_V_T               vfloat32m8_t
#define VLEV_FLOAT              __riscv_vle32_v_f32m8
#define VLSEV_FLOAT             __riscv_vlse32_v_f32m8
#define VSEV_FLOAT              __riscv_vse32_v_f32m8
#define VSSEV_FLOAT             __riscv_vsse32_v_f32m8
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f32m8
#else
#define VSETVL(n)               __riscv_vsetvl_e64m8(n)
#define FLOAT_V_T               vfloat64m8_t
#define VLEV_FLOAT              __riscv_vle64_v_f64m8
#define VLSEV_FLOAT             __riscv_vlse64_v_f64m8
#define VSEV_FLOAT              __riscv_vse64_v_f64m8
#define VSSEV_FLOAT             __riscv_vsse64_v_f64m8
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f64m8
#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)
{
    if(n < 0)  return(0);

    FLOAT *a_ptr, *x_ptr;
    BLASLONG i;
    FLOAT_V_T va, vy;

    if(inc_y == 1) {

        for (size_t vl; m > 0; m -= vl, y += vl, a += vl) {
            vl = VSETVL(m);
            a_ptr = a;
            x_ptr = x;
            vy = VLEV_FLOAT(y, vl);
            for(i = 0; i < n; i++) {
                va = VLEV_FLOAT(a_ptr, vl);
                vy = VFMACCVF_FLOAT(vy, (alpha * (*x_ptr)), va, vl);

                a_ptr += lda;
                x_ptr += inc_x;
            }
            VSEV_FLOAT(y, vy, vl);
        }
 
    } else {

        BLASLONG stride_y = inc_y * sizeof(FLOAT);

        for (size_t vl; m > 0; m -= vl, y += vl*inc_y, a += vl) {
            vl = VSETVL(m);
            a_ptr = a;
            x_ptr = x;
            vy = VLSEV_FLOAT(y, stride_y, vl);
            for(i = 0; i < n; i++) {
                va = VLEV_FLOAT(a_ptr, vl);
                vy = VFMACCVF_FLOAT(vy, (alpha * (*x_ptr)), va, vl);

                a_ptr += lda;
                x_ptr += inc_x;
            }
            VSSEV_FLOAT(y, stride_y, vy, vl);
        }

    }
    return(0);
}