OpenBLAS/kernel/riscv64/zscal_rvv.c

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

#if !defined(DOUBLE)
#define VSETVL(n)               __riscv_vsetvl_e32m4(n)
#define VSETVL_MAX              __riscv_vsetvlmax_e32m4()
#define FLOAT_V_T               vfloat32m4_t
#define FLOAT_VX2_T             vfloat32m4x2_t
#define VGET_VX2                __riscv_vget_v_f32m4x2_f32m4
#define VSET_VX2                __riscv_vset_v_f32m4_f32m4x2
#define VLSEG_FLOAT             __riscv_vlseg2e32_v_f32m4x2
#define VLSSEG_FLOAT            __riscv_vlsseg2e32_v_f32m4x2
#define VSSEG_FLOAT             __riscv_vsseg2e32_v_f32m4x2
#define VSSSEG_FLOAT            __riscv_vssseg2e32_v_f32m4x2
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f32m4
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f32m4
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f32m4
#define VFMVVF_FLOAT            __riscv_vfmv_v_f_f32m4
#else
#define VSETVL(n)               __riscv_vsetvl_e64m4(n)
#define VSETVL_MAX              __riscv_vsetvlmax_e64m4()
#define FLOAT_V_T               vfloat64m4_t
#define FLOAT_VX2_T             vfloat64m4x2_t
#define VGET_VX2                __riscv_vget_v_f64m4x2_f64m4
#define VSET_VX2                __riscv_vset_v_f64m4_f64m4x2
#define VLSEG_FLOAT             __riscv_vlseg2e64_v_f64m4x2
#define VLSSEG_FLOAT            __riscv_vlsseg2e64_v_f64m4x2
#define VSSEG_FLOAT             __riscv_vsseg2e64_v_f64m4x2
#define VSSSEG_FLOAT            __riscv_vssseg2e64_v_f64m4x2
#define VFMACCVF_FLOAT          __riscv_vfmacc_vf_f64m4
#define VFMULVF_FLOAT           __riscv_vfmul_vf_f64m4
#define VFNMSACVF_FLOAT         __riscv_vfnmsac_vf_f64m4
#define VFMVVF_FLOAT            __riscv_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;
    FLOAT_VX2_T vx2;

    if(inc_x == 1) {
	if (dummy2 == 0 && da_r==0. && da_i == 0.) {
		BLASLONG i;
		for (i=0; i < n*2; i++) x[i]=0.;
		return(0);
	} else {

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

            vx2 = VLSEG_FLOAT(x, vl);
            vr = VGET_VX2(vx2, 0);
            vi = VGET_VX2(vx2, 1);

            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);

            vx2 = VSET_VX2(vx2, 0, vt);
            vx2 = VSET_VX2(vx2, 1, vi);
            VSSEG_FLOAT(x, vx2, vl);
        }
        }

    } else {
	if (dummy2 == 0 && da_r==0. && da_i == 0.) {
		BLASLONG i,ix=0,inc_x2=2*inc_x;
		for (i=0; i < n; i++) {x[ix]=0.;x[ix+1]=0.;ix+=inc_x2;};
		return(0);
	} else {
        for (size_t vl; n > 0; n -= vl, x += vl*inc_x*2) {
            vl = VSETVL(n);

            vx2 = VLSSEG_FLOAT(x, stride_x, vl);
            vr = VGET_VX2(vx2, 0);
            vi = VGET_VX2(vx2, 1);

            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);

            vx2 = VSET_VX2(vx2, 0, vt);
            vx2 = VSET_VX2(vx2, 1, vi);
            VSSSEG_FLOAT(x, stride_x, vx2, vl);
	    }
        }
    }

    return(0);
}