OpenBLAS/kernel/riscv64/zscal_rvv.c

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

#if !defined(DOUBLE)
#define VSETVL(n) vsetvl_e32m4(n)
#define VSETVL_MAX vsetvlmax_e32m4()
#define FLOAT_V_T vfloat32m4_t
#define VLSEG_FLOAT vlseg2e32_v_f32m4
#define VLSSEG_FLOAT vlsseg2e32_v_f32m4
#define VSSEG_FLOAT vsseg2e32_v_f32m4
#define VSSSEG_FLOAT vssseg2e32_v_f32m4
#define VFMACCVF_FLOAT vfmacc_vf_f32m4
#define VFMULVF_FLOAT vfmul_vf_f32m4
#define VFNMSACVF_FLOAT vfnmsac_vf_f32m4
#define VFMVVF_FLOAT vfmv_v_f_f32m4
#else
#define VSETVL(n) vsetvl_e64m4(n)
#define VSETVL_MAX vsetvlmax_e64m4()
#define FLOAT_V_T vfloat64m4_t
#define VLSEG_FLOAT vlseg2e64_v_f64m4
#define VLSSEG_FLOAT vlsseg2e64_v_f64m4
#define VSSEG_FLOAT vsseg2e64_v_f64m4
#define VSSSEG_FLOAT vssseg2e64_v_f64m4
#define VFMACCVF_FLOAT vfmacc_vf_f64m4
#define VFMULVF_FLOAT vfmul_vf_f64m4
#define VFNMSACVF_FLOAT vfnmsac_vf_f64m4
#define VFMVVF_FLOAT vfmv_v_f_f64m4
#endif

int CNAME(BLASLONG n, BLASLONG dummy0, BLASLONG dummy1, FLOAT da_r,FLOAT da_i, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *dummy, BLASLONG dummy2)
{

    if((n <= 0) || (inc_x <= 0)) return(0);

    FLOAT_V_T vt, vr, vi;
    BLASLONG stride_x = inc_x * 2 * sizeof(FLOAT);
    size_t vlmax = VSETVL_MAX;

    if(da_r == 0.0 && da_i == 0.0) {

        vr = VFMVVF_FLOAT(0.0, vlmax);
        vi = VFMVVF_FLOAT(0.0, vlmax);

        if(inc_x == 1) {

            for (size_t vl; n > 0; n -= vl, x += vl*2) {
                vl = VSETVL(n);

                VSSEG_FLOAT(x, vr, vi, vl);
            }

        } else {

            for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2) {
                vl = VSETVL(n);

                VSSSEG_FLOAT(x, stride_x, vr, vi, vl);
            }
        }

    } else if(da_r == 0.0) {

        for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2) {
            vl = VSETVL(n);
            
            VLSSEG_FLOAT(&vr, &vi, x, stride_x, vl);

            vt = VFMULVF_FLOAT(vi, -da_i, vl);
            vi = VFMULVF_FLOAT(vr, da_i, vl);

            VSSSEG_FLOAT(x, stride_x, vt, vi, vl);
        }

    } else if(da_i == 0.0) {

        for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2) {
            vl = VSETVL(n);

            VLSSEG_FLOAT(&vr, &vi, x, stride_x, vl);

            vr = VFMULVF_FLOAT(vr, da_r, vl);
            vi = VFMULVF_FLOAT(vi, da_r, vl);

            VSSSEG_FLOAT(x, stride_x, vr, vi, vl);
        }

    } else {

        if(inc_x == 1) {

            for (size_t vl; n > 0; n -= vl, x += vl*2) {
                vl = VSETVL(n);

                VLSEG_FLOAT(&vr, &vi, x, vl);

                vt = VFMULVF_FLOAT(vr, da_r, vl);
                vt = VFNMSACVF_FLOAT(vt, da_i, vi, vl);
                vi = VFMULVF_FLOAT(vi, da_r, vl);
                vi = VFMACCVF_FLOAT(vi, da_i, vr, vl);

                VSSEG_FLOAT(x, vt, vi, vl);
            }

        } else {

            for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2) {
                vl = VSETVL(n);

                VLSSEG_FLOAT(&vr, &vi, x, stride_x, vl);

                vt = VFMULVF_FLOAT(vr, da_r, vl);
                vt = VFNMSACVF_FLOAT(vt, da_i, vi, vl);
                vi = VFMULVF_FLOAT(vi, da_r, vl);
                vi = VFMACCVF_FLOAT(vi, da_i, vr, vl);

                VSSSEG_FLOAT(x, stride_x, vt, vi, vl);
            }
        }
    }

    return(0);
}