OpenBLAS/kernel/riscv64/axpby_vector_v2.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 VFMULVF_FLOAT RISCV_RVV(vfmul_vf_f32m8)
#define VFMVVF_FLOAT RISCV_RVV(vfmv_v_f_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 VFMULVF_FLOAT RISCV_RVV(vfmul_vf_f64m4)
#define VFMVVF_FLOAT RISCV_RVV(vfmv_v_f_f64m4)
#endif

int CNAME(BLASLONG n, FLOAT alpha, FLOAT *x, BLASLONG inc_x, FLOAT beta, FLOAT *y, BLASLONG inc_y)
{
    FLOAT_V_T vx, vy;
    unsigned int gvl;
    if (n <= 0)
        return (0);
    if (inc_x == 1 && inc_y == 1)
    {
        while (n > 0)
        {
            gvl = VSETVL(n);

            vx = VLEV_FLOAT(x, gvl);
            vy = VLEV_FLOAT(y, gvl);

            vy = VFMULVF_FLOAT(vy, beta, gvl);
            vy = VFMACCVF_FLOAT(vy, alpha, vx, gvl);

            VSEV_FLOAT(y, vy, gvl);

            x += gvl;
            y += gvl;
            n -= gvl;
        }
    }
    else if (1 == inc_x)
    {
        BLASLONG stride_y = inc_y * sizeof(FLOAT);
        while (n > 0)
        {
            gvl = VSETVL(n);
            vy = VLSEV_FLOAT(y, stride_y, gvl);
            vx = VLEV_FLOAT(x, gvl);

            vy = VFMULVF_FLOAT(vy, beta, gvl);
            vy = VFMACCVF_FLOAT(vy, alpha, vx, gvl);

            VSSEV_FLOAT(y, stride_y, vy, gvl);

            x += gvl;
            y += gvl * inc_y;
            n -= gvl;
        }
    }
    else if (1 == inc_y)
    {
        BLASLONG stride_x = inc_x * sizeof(FLOAT);

        while (n > 0)
        {
            gvl = VSETVL(n);

            vx = VLSEV_FLOAT(x, stride_x, gvl);
            vy = VLEV_FLOAT(y, gvl);

            vy = VFMULVF_FLOAT(vy, beta, gvl);
            vy = VFMACCVF_FLOAT(vy, alpha, vx, gvl);

            VSEV_FLOAT(y, vy, gvl);

            x += gvl * inc_x;
            y += gvl;
            n -= gvl;
        }
    }
    else if (inc_y == 0)
    {
        FLOAT vf = y[0];
        for (; n > 0; n--)
        {
            vf = (vf * beta) + (x[0] * alpha);
            x += inc_x;
        }
        y[0] = vf;
    }
    else
    {
        BLASLONG stride_x = inc_x * sizeof(FLOAT);
        BLASLONG stride_y = inc_y * sizeof(FLOAT);
        while (n > 0)
        {
            gvl = VSETVL(n);
            vy = VLSEV_FLOAT(y, stride_y, gvl);
            vx = VLSEV_FLOAT(x, stride_x, gvl);

            vy = VFMULVF_FLOAT(vy, beta, gvl);
            vy = VFMACCVF_FLOAT(vy, alpha, vx, gvl);

            VSSEV_FLOAT(y, stride_y, vy, gvl);

            x += gvl * inc_x;
            y += gvl * inc_y;
            n -= gvl;
        }
    }

    return (0);
}