OpenBLAS/kernel/riscv64/symv_U_rvv.c

/***************************************************************************
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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL_MAX_M1           __riscv_vsetvlmax_e32m1()
#define VSETVL(n)               __riscv_vsetvl_e32m8(n)
#define VSETVL_MAX              __riscv_vsetvlmax_e32m8()
#define FLOAT_V_T_M1            vfloat32m1_t
#define FLOAT_V_T               vfloat32m8_t
#define VLEV_FLOAT              __riscv_vle32_v_f32m8
#define VSEV_FLOAT              __riscv_vse32_v_f32m8
#define VLSEV_FLOAT             __riscv_vlse32_v_f32m8
#define VSSEV_FLOAT             __riscv_vsse32_v_f32m8
#define VFMACCVV_FLOAT_TU       __riscv_vfmacc_vv_f32m8_tu
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f32m8
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f32m8
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f32m8
#define VFMVVF_FLOAT            __riscv_vfmv_v_f_f32m8
#define VFMSACVF_FLOAT          __riscv_vfmsac_vf_f32m8
#define VFMVVF_FLOAT_M1         __riscv_vfmv_v_f_f32m1
#define VFREDSUM_FLOAT          __riscv_vfredusum_vs_f32m8_f32m1
#define VFMVFS_FLOAT_M1         __riscv_vfmv_f_s_f32m1_f32
#else
#define VSETVL_MAX_M1           __riscv_vsetvlmax_e64m1()
#define VSETVL(n)               __riscv_vsetvl_e64m8(n)
#define VSETVL_MAX              __riscv_vsetvlmax_e64m8()
#define FLOAT_V_T_M1            vfloat64m1_t
#define FLOAT_V_T               vfloat64m8_t
#define VLEV_FLOAT              __riscv_vle64_v_f64m8
#define VSEV_FLOAT              __riscv_vse64_v_f64m8
#define VLSEV_FLOAT             __riscv_vlse64_v_f64m8
#define VSSEV_FLOAT             __riscv_vsse64_v_f64m8
#define VFMACCVV_FLOAT_TU       __riscv_vfmacc_vv_f64m8_tu
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f64m8
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f64m8
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f64m8
#define VFMVVF_FLOAT            __riscv_vfmv_v_f_f64m8
#define VFMSACVF_FLOAT          __riscv_vfmsac_vf_f64m8
#define VFMVVF_FLOAT_M1         __riscv_vfmv_v_f_f64m1
#define VFREDSUM_FLOAT          __riscv_vfredusum_vs_f64m8_f64m1
#define VFMVFS_FLOAT_M1         __riscv_vfmv_f_s_f64m1_f64
#endif

int CNAME(BLASLONG m, BLASLONG offset, FLOAT alpha, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *buffer)
{
        BLASLONG i, j, k;
        BLASLONG ix,iy;
        BLASLONG jx,jy;
        FLOAT temp1;
        FLOAT *a_ptr = a;
        FLOAT_V_T_M1 v_res, v_z0;
        size_t vl_max = VSETVL_MAX_M1, vl;
        v_z0 = VFMVVF_FLOAT_M1(0, vl_max);
        vl_max = VSETVL_MAX;

        FLOAT_V_T va, vx, vy, vr;
        BLASLONG stride_x, stride_y, inc_xv, inc_yv;
        
        BLASLONG m1 = m - offset;
        if(inc_x == 1 && inc_y == 1)
        {
                a_ptr += m1 * lda;
                for (j=m1; j<m; j++)
                {
                        temp1 = alpha * x[j];
                        i = 0;
                        vr = VFMVVF_FLOAT(0, vl_max);
                        for (k = j; k > 0; k -= vl, i += vl)
                        {
                                vl = VSETVL(k);
                                vy = VLEV_FLOAT(&y[i], vl);
                                va = VLEV_FLOAT(&a_ptr[i], vl);
                                vy = VFMACCVF_FLOAT(vy, temp1, va, vl);
                                VSEV_FLOAT(&y[i], vy, vl);

                                vx = VLEV_FLOAT(&x[i], vl);
                                vr = VFMACCVV_FLOAT_TU(vr, vx, va, vl);
                        }
                        v_res = VFREDSUM_FLOAT(vr, v_z0, vl_max);

                        y[j] += temp1 * a_ptr[j] + alpha * VFMVFS_FLOAT_M1(v_res);
                        a_ptr += lda;
                }
        }
        else if(inc_x == 1)
        {
                jy = m1 * inc_y;
                a_ptr += m1 * lda;
                stride_y = inc_y * sizeof(FLOAT);
                for (j=m1; j<m; j++)
                {
                        temp1 = alpha * x[j];
                        iy = 0;
                        i = 0;
                        vr = VFMVVF_FLOAT(0, vl_max);
                        for (k = j; k > 0; k -= vl, i += vl)
                        {
                                vl = VSETVL(k);
                                inc_yv = inc_y * vl;
                                vy = VLSEV_FLOAT(&y[iy], stride_y, vl);
                                va = VLEV_FLOAT(&a_ptr[i], vl);
                                vy = VFMACCVF_FLOAT(vy, temp1, va, vl);
                                VSSEV_FLOAT(&y[iy], stride_y, vy, vl);

                                vx = VLEV_FLOAT(&x[i], vl);
                                vr = VFMACCVV_FLOAT_TU(vr, vx, va, vl);

                                iy += inc_yv;
                        }
                        v_res = VFREDSUM_FLOAT(vr, v_z0, vl_max);

                        y[jy] += temp1 * a_ptr[j] + alpha * VFMVFS_FLOAT_M1(v_res);
                        a_ptr += lda;
                        jy    += inc_y;
                }
        }
        else if(inc_y == 1)
        {
                jx = m1 * inc_x;
                a_ptr += m1 * lda;
                stride_x = inc_x * sizeof(FLOAT);
                for (j=m1; j<m; j++)
                {
                        temp1 = alpha * x[jx];
                        ix = 0;
                        i = 0;
                        vr = VFMVVF_FLOAT(0, vl_max);
                        for (k = j; k > 0; k -= vl, i += vl)
                        {
                                vl = VSETVL(k);
                                inc_xv = inc_x * vl;

                                vy = VLEV_FLOAT(&y[i], vl);
                                va = VLEV_FLOAT(&a_ptr[i], vl);
                                vy = VFMACCVF_FLOAT(vy, temp1, va, vl);
                                VSEV_FLOAT(&y[i], vy, vl);

                                vx = VLSEV_FLOAT(&x[ix], stride_x, vl);
                                vr = VFMACCVV_FLOAT_TU(vr, vx, va, vl);

                                ix += inc_xv;
                        }
                        v_res = VFREDSUM_FLOAT(vr, v_z0, vl_max);

                        y[j] += temp1 * a_ptr[j] + alpha * VFMVFS_FLOAT_M1(v_res);
                        a_ptr += lda;
                        jx    += inc_x;
                }
        }
        else
        {
                jx = m1 * inc_x;
                jy = m1 * inc_y;
                a_ptr += m1 * lda;
                stride_x = inc_x * sizeof(FLOAT);
                stride_y = inc_y * sizeof(FLOAT);
                for (j=m1; j<m; j++)
                {
                        temp1 = alpha * x[jx];

                        ix = 0;
                        iy = 0;
                        i = 0;
                        vr = VFMVVF_FLOAT(0, vl_max);
                        for (k = j; k > 0; k -= vl, i += vl)
                        {
                                vl = VSETVL(k);
                                inc_xv = inc_x * vl;
                                inc_yv = inc_y * vl;
                                vy = VLSEV_FLOAT(&y[iy], stride_y, vl);
                                va = VLEV_FLOAT(&a_ptr[i], vl);
                                vy = VFMACCVF_FLOAT(vy, temp1, va, vl);
                                VSSEV_FLOAT(&y[iy], stride_y, vy, vl);

                                vx = VLSEV_FLOAT(&x[ix], stride_x, vl);
                                vr = VFMACCVV_FLOAT_TU(vr, vx, va, vl);
                                ix += inc_xv;
                                iy += inc_yv;
                        }
                        v_res = VFREDSUM_FLOAT(vr, v_z0, vl_max);

                        y[jy] += temp1 * a_ptr[j] + alpha * VFMVFS_FLOAT_M1(v_res);
                        a_ptr += lda;
                        jx    += inc_x;
                        jy    += inc_y;
                }
        }
        return(0);
}