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#include <stdio.h>
#include "common.h"

#if !defined(DOUBLE)
#define VSETVL(n)               __riscv_vsetvl_e32m2(n)
#define FLOAT_V_T               vfloat32m2_t
#define VLEV_FLOAT              __riscv_vle32_v_f32m2
#define VSEV_FLOAT              __riscv_vse32_v_f32m2
#define VLSEV_FLOAT             __riscv_vlse32_v_f32m2
#define VBOOL_T                 vbool16_t
#define UINT_V_T                vuint32m2_t
#define VID_V_UINT              __riscv_vid_v_u32m2
#define VMSGTU_VX_UINT          __riscv_vmsgtu_vx_u32m2_b16
#define VMSEQ_VX_UINT           __riscv_vmseq_vx_u32m2_b16
#define VFMERGE_VFM_FLOAT       __riscv_vfmerge_vfm_f32m2
#else
#define VSETVL(n)               __riscv_vsetvl_e64m2(n)
#define FLOAT_V_T               vfloat64m2_t
#define VLEV_FLOAT              __riscv_vle64_v_f64m2
#define VSEV_FLOAT              __riscv_vse64_v_f64m2
#define VLSEV_FLOAT             __riscv_vlse64_v_f64m2
#define VBOOL_T                 vbool32_t
#define UINT_V_T                vuint64m2_t
#define VID_V_UINT              __riscv_vid_v_u64m2
#define VMSGTU_VX_UINT          __riscv_vmsgtu_vx_u64m2_b32
#define VMSEQ_VX_UINT           __riscv_vmseq_vx_u64m2_b32
#define VFMERGE_VFM_FLOAT       __riscv_vfmerge_vfm_f64m2
#endif

// Optimizes the implementation in ../arm64/tmmm_lncopy_sve_v1.c

int CNAME(BLASLONG m, BLASLONG n, FLOAT *a, BLASLONG lda, BLASLONG posX, BLASLONG posY, FLOAT *b){

    BLASLONG i, js, X;

    FLOAT *ao;

    BLASLONG stride_lda = sizeof(FLOAT)*lda;
    
    FLOAT_V_T vb, va1;

    size_t vl;
#ifdef UNIT
    VBOOL_T vbool_eq;
#endif

    VBOOL_T vbool_cmp;
    UINT_V_T vindex;

    for (js = n; js > 0; js -= vl)
    {
        vl = VSETVL(js);
        X = posX;

        if (posX <= posY) 
        {
            ao = a + posY + posX * lda;
        } 
        else 
        {
            ao = a + posX + posY * lda;
        }

        i = 0;
        do 
        {
            if (X > posY) 
            {
                va1 = VLSEV_FLOAT(ao, stride_lda, vl);
                VSEV_FLOAT(b, va1, vl);

                ao ++;
                b += vl;
                X ++;
                i ++;
            } 
            else if (X < posY) 
            {
                ao += lda;
                b += vl;
                X ++;
                i ++;
            } 
            else 
            {
                vindex  = VID_V_UINT(vl);
                for (unsigned int j = 0; j < vl; j++) 
                {
                    va1 = VLSEV_FLOAT(ao, stride_lda, vl);
                    vbool_cmp = VMSGTU_VX_UINT(vindex, j, vl);
                    vb = VFMERGE_VFM_FLOAT(va1, ZERO, vbool_cmp, vl);
#ifdef UNIT
                    vbool_eq = VMSEQ_VX_UINT(vindex, j, vl);
                    vb =  VFMERGE_VFM_FLOAT(vb, ONE, vbool_eq, vl);
#endif
                    VSEV_FLOAT(b, vb, vl);
                    ao++;
                    b += vl;
                }

                X += vl;
                i += vl;
            }
        } while (i < m);

        posY += vl;
    }

    return 0;
}
