/*********************************************************************/
/* Copyright 2009, 2010 The University of Texas at Austin.           */
/***************************************************************************
Copyright (c) 2022, The OpenBLAS Project
All rights reserved.
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modification, are permitted provided that the following conditions are
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distribution.
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its contributors may be used to endorse or promote products
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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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 FLOAT_VX2_T             vfloat32m2x2_t
#define VGET_VX2                __riscv_vget_v_f32m2x2_f32m2
#define VSET_VX2                __riscv_vset_v_f32m2_f32m2x2
#define VLEV_FLOAT              __riscv_vle32_v_f32m2
#define VSEV_FLOAT              __riscv_vse32_v_f32m2
#define VLSEG2_FLOAT            __riscv_vlseg2e32_v_f32m2x2
#define VSSEG2_FLOAT            __riscv_vsseg2e32_v_f32m2x2
#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 FLOAT_VX2_T             vfloat64m2x2_t
#define VGET_VX2                __riscv_vget_v_f64m2x2_f64m2
#define VSET_VX2                __riscv_vset_v_f64m2_f64m2x2
#define VLEV_FLOAT              __riscv_vle64_v_f64m2
#define VSEV_FLOAT              __riscv_vse64_v_f64m2
#define VLSEG2_FLOAT            __riscv_vlseg2e64_v_f64m2x2
#define VSSEG2_FLOAT            __riscv_vsseg2e64_v_f64m2x2
#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

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

    BLASLONG i, j, js, X;

    FLOAT *ao;

    FLOAT_VX2_T vax2;
    FLOAT_V_T va0, va1;
#ifdef UNIT
    VBOOL_T vbool_eq;
#endif

    VBOOL_T vbool_cmp;
    UINT_V_T vindex;

    size_t vl;

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

        X = posX;

        if (posX <= posY) 
        {
            ao = a + posX * 2 + posY * lda * 2;
        } 
        else 
        {
            ao = a + posY * 2 + posX * lda * 2;
        }

        i = 0;
        do
        {
            if (X < posY) 
            {
                ao  += 2;
                b   += vl * 2;
                X++;
                i++;
            }
            else if (X > posY)
            {
                vax2 = VLSEG2_FLOAT(ao, vl);
                VSSEG2_FLOAT(b, vax2, vl);
                ao  += lda * 2;
                b   += vl * 2;
                X++;
                i++;
            }
            else
            {
                vindex  = VID_V_UINT(vl);
                for (j = 0; j < vl; j++) 
                {
                    vax2 = VLSEG2_FLOAT(ao, vl);
                    va0 = VGET_VX2(vax2, 0);
                    va1 = VGET_VX2(vax2, 1);

                    vbool_cmp = VMSGTU_VX_UINT(vindex, j, vl);
                    va0 = VFMERGE_VFM_FLOAT(va0, ZERO, vbool_cmp, vl);
                    va1 = VFMERGE_VFM_FLOAT(va1, ZERO, vbool_cmp, vl);
#ifdef UNIT
                    vbool_eq = VMSEQ_VX_UINT(vindex, j, vl);
                    va0 =  VFMERGE_VFM_FLOAT(va0, ONE, vbool_eq, vl);
                    va1 =  VFMERGE_VFM_FLOAT(va1, ZERO, vbool_eq, vl);
#endif
                    vax2 = VSET_VX2(vax2, 0, va0);
                    vax2 = VSET_VX2(vax2, 1, va1);
                    VSSEG2_FLOAT(b, vax2, vl);
                    ao += lda * 2;
                    b += vl * 2;
                }
                X += vl;
                i += vl;
            }
        }while (i < m);
        posY += vl;
    }

    return 0;
}

