OpenBLAS/kernel/riscv64/zgemv_n_rvv.c

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#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n) vsetvl_e32m4(n)
#define FLOAT_V_T vfloat32m4_t
#define VLEV_FLOAT vle32_v_f32m4
#define VLSEV_FLOAT vlse32_v_f32m4
#define VSEV_FLOAT vse32_v_f32m4
#define VSSEV_FLOAT vsse32_v_f32m4
#define VLSEG_FLOAT vlseg2e32_v_f32m4
#define VSSEG_FLOAT vsseg2e32_v_f32m4
#define VLSSEG_FLOAT vlsseg2e32_v_f32m4
#define VSSSEG_FLOAT vssseg2e32_v_f32m4
#define VFMACCVF_FLOAT vfmacc_vf_f32m4
#define VFNMSACVF_FLOAT vfnmsac_vf_f32m4
#else
#define VSETVL(n) vsetvl_e64m4(n)
#define FLOAT_V_T vfloat64m4_t
#define VLEV_FLOAT vle64_v_f64m4
#define VLSEV_FLOAT vlse64_v_f64m4
#define VSEV_FLOAT vse64_v_f64m4
#define VSSEV_FLOAT vsse64_v_f64m4
#define VLSEG_FLOAT vlseg2e64_v_f64m4
#define VSSEG_FLOAT vsseg2e64_v_f64m4
#define VLSSEG_FLOAT vlsseg2e64_v_f64m4
#define VSSSEG_FLOAT vssseg2e64_v_f64m4
#define VFMACCVF_FLOAT vfmacc_vf_f64m4
#define VFNMSACVF_FLOAT vfnmsac_vf_f64m4
#endif

int CNAME(BLASLONG m, BLASLONG n, BLASLONG dummy1, FLOAT alpha_r, FLOAT alpha_i, FLOAT *a, BLASLONG lda, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLONG inc_y, FLOAT *buffer)
{
    BLASLONG i;
    BLASLONG ix;
    FLOAT *a_ptr;
    FLOAT temp_r, temp_i;
    FLOAT_V_T va0, va1, vy0, vy1;

    BLASLONG stride_y = inc_y * sizeof(FLOAT) * 2;

    BLASLONG inc_x2 = inc_x * 2;
    BLASLONG lda2 = lda * 2;
    if (inc_y == 1)
    {
        for (size_t vl; m > 0; m -= vl, a += vl*2, y += vl*2) {
            vl = VSETVL(m);
            a_ptr = a;
            ix = 0;
            VLSEG_FLOAT(&vy0, &vy1, y, vl);

            for(i = 0; i < n; i++){
#if !defined(XCONJ)
                temp_r = alpha_r * x[ix]   - alpha_i * x[ix+1];
                temp_i = alpha_r * x[ix+1] + alpha_i * x[ix];
#else
                temp_r = alpha_r * x[ix]   + alpha_i * x[ix+1];
                temp_i = alpha_r * x[ix+1] - alpha_i * x[ix];
#endif

                VLSEG_FLOAT(&va0, &va1, a_ptr, vl);
#if !defined(CONJ)
#if !defined(XCONJ)
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFNMSACVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_i, va0, vl);
#else
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFMACCVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_i, va0, vl);
#endif
#else
#if !defined(XCONJ)
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFMACCVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_i, va0, vl);
#else
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFNMSACVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_i, va0, vl);
#endif
#endif
                a_ptr += lda2;
                ix += inc_x2;
            }
            VSSEG_FLOAT(y, vy0, vy1, vl);
        }

    }
    else
    {
        for (size_t vl; m > 0; m -= vl, a += vl*2, y += vl*inc_y*2) {
            vl = VSETVL(m);
            a_ptr = a;
            ix = 0;
            VLSSEG_FLOAT(&vy0, &vy1, y, stride_y, vl);

            for(i = 0; i < n; i++){
#if !defined(XCONJ)
                temp_r = alpha_r * x[ix]   - alpha_i * x[ix+1];
                temp_i = alpha_r * x[ix+1] + alpha_i * x[ix];
#else
                temp_r = alpha_r * x[ix]   + alpha_i * x[ix+1];
                temp_i = alpha_r * x[ix+1] - alpha_i * x[ix];
#endif

                VLSEG_FLOAT(&va0, &va1, a_ptr, vl);
#if !defined(CONJ)
#if !defined(XCONJ)
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFNMSACVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_i, va0, vl);
#else
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFMACCVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_i, va0, vl);
#endif
#else
#if !defined(XCONJ)
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFMACCVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFMACCVF_FLOAT(vy1, temp_i, va0, vl);
#else
                vy0 = VFMACCVF_FLOAT(vy0, temp_r, va0, vl);
                vy0 = VFNMSACVF_FLOAT(vy0, temp_i, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_r, va1, vl);
                vy1 = VFNMSACVF_FLOAT(vy1, temp_i, va0, vl);
#endif
#endif
                a_ptr += lda2;
                ix += inc_x2;
            }
            VSSSEG_FLOAT(y, stride_y, vy0, vy1, vl);
        }
    }
    return(0);
}