/*
MIT License

Copyright (c) 2019 - 2025 Advanced Micro Devices, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include "hip_tensor_executors.hpp"
#include "rpp_hip_math.hpp"

__global__ void subtract_scalar_ncdhw_hip_tensor(float *srcPtr,
                                                 uint3 srcStridesCDH,
                                                 float *dstPtr,
                                                 uint3 dstStridesCDH,
                                                 int channels,
                                                 float subtractParam,
                                                 RpptROI3DPtr roiGenericPtrSrc)
{
    int id_x = (hipBlockIdx_x * hipBlockDim_x + hipThreadIdx_x) * 8;        // W - inner most dim vectorized
    int id_y = hipBlockIdx_y * hipBlockDim_y + hipThreadIdx_y;              // H - second to inner
    int id_z = hipBlockIdx_z * hipBlockDim_z + hipThreadIdx_z;              // D - outer most dim

    if ((id_z >= roiGenericPtrSrc->xyzwhdROI.roiDepth) || (id_y >= roiGenericPtrSrc->xyzwhdROI.roiHeight) || (id_x >= roiGenericPtrSrc->xyzwhdROI.roiWidth))
    {
        return;
    }

    uint srcIdx = ((id_z + roiGenericPtrSrc->xyzwhdROI.xyz.z) * srcStridesCDH.y) + ((id_y + roiGenericPtrSrc->xyzwhdROI.xyz.y) * srcStridesCDH.z) + (id_x + roiGenericPtrSrc->xyzwhdROI.xyz.x);
    uint dstIdx = (id_z * dstStridesCDH.y) + (id_y * dstStridesCDH.z) + id_x;

    d_float8 val_f8;
    for(int c = 0; c < channels; c++)
    {
        rpp_hip_load8_and_unpack_to_float8(srcPtr + srcIdx, &val_f8);
        rpp_hip_math_subtract8_const(&val_f8, &val_f8, MAKE_FLOAT4(subtractParam));
        rpp_hip_pack_float8_and_store8(dstPtr + dstIdx, &val_f8);
        srcIdx += srcStridesCDH.x;
        dstIdx += dstStridesCDH.x;
    }
}

__global__ void subtract_scalar_ndhwc_hip_tensor(float *srcPtr,
                                                 uint2 srcStridesDH,
                                                 float *dstPtr,
                                                 uint2 dstStridesDH,
                                                 float subtractParam,
                                                 RpptROI3DPtr roiGenericPtrSrc)
{
    int id_x = (hipBlockIdx_x * hipBlockDim_x + hipThreadIdx_x) * 8;        // WC - inner most dim vectorized
    int id_y = hipBlockIdx_y * hipBlockDim_y + hipThreadIdx_y;              // H - second to inner
    int id_z = hipBlockIdx_z * hipBlockDim_z + hipThreadIdx_z;              // D - outer most dim

    if ((id_z >= roiGenericPtrSrc->xyzwhdROI.roiDepth) || (id_y >= roiGenericPtrSrc->xyzwhdROI.roiHeight) || (id_x >= roiGenericPtrSrc->xyzwhdROI.roiWidth))
    {
        return;
    }

    uint srcIdx = ((id_z + roiGenericPtrSrc->xyzwhdROI.xyz.z) * srcStridesDH.x) + ((id_y + roiGenericPtrSrc->xyzwhdROI.xyz.y) * srcStridesDH.y) + (id_x + roiGenericPtrSrc->xyzwhdROI.xyz.x) * 3;
    uint dstIdx = (id_z * dstStridesDH.x) + (id_y * dstStridesDH.y) + id_x * 3;

    d_float24 val_f24;
    rpp_hip_load24_pkd3_and_unpack_to_float24_pln3(srcPtr + srcIdx, &val_f24);
    rpp_hip_math_subtract24_const(&val_f24, &val_f24, MAKE_FLOAT4(subtractParam));
    rpp_hip_pack_float24_pln3_and_store24_pkd3(dstPtr + dstIdx, &val_f24);
}

RppStatus hip_exec_subtract_scalar_tensor(Rpp32f *srcPtr,
                                          RpptGenericDescPtr srcGenericDescPtr,
                                          Rpp32f *dstPtr,
                                          RpptGenericDescPtr dstGenericDescPtr,
                                          RpptROI3DPtr roiGenericPtrSrc,
                                          Rpp32f *subtractTensor,
                                          rpp::Handle& handle)
{
    if (dstGenericDescPtr->layout == RpptLayout::NCDHW)
    {
        int globalThreads_x = (dstGenericDescPtr->strides[3] + 7) >> 3; // W - width (x direction) - vectorized for 8 element loads/stores per channel
        int globalThreads_y = dstGenericDescPtr->dims[3];               // H - height (y direction)
        int globalThreads_z = dstGenericDescPtr->dims[2];               // D - depth (z direction)

        for(int batchCount = 0; batchCount < dstGenericDescPtr->dims[0]; batchCount++)
        {
            hipLaunchKernelGGL(subtract_scalar_ncdhw_hip_tensor,
                               dim3(ceil((float)globalThreads_x/LOCAL_THREADS_X), ceil((float)globalThreads_y/LOCAL_THREADS_Y), ceil((float)globalThreads_z/LOCAL_THREADS_Z)),
                               dim3(LOCAL_THREADS_X, LOCAL_THREADS_Y, LOCAL_THREADS_Z),
                               0,
                               handle.GetStream(),
                               srcPtr + (batchCount * srcGenericDescPtr->strides[0]),
                               make_uint3(srcGenericDescPtr->strides[1], srcGenericDescPtr->strides[2], srcGenericDescPtr->strides[3]),
                               dstPtr + (batchCount * dstGenericDescPtr->strides[0]),
                               make_uint3(dstGenericDescPtr->strides[1], dstGenericDescPtr->strides[2], dstGenericDescPtr->strides[3]),
                               dstGenericDescPtr->dims[1],
                               subtractTensor[batchCount],
                               &roiGenericPtrSrc[batchCount]);
        }
    }
    else if (dstGenericDescPtr->layout == RpptLayout::NDHWC)
    {
        int globalThreads_x = (dstGenericDescPtr->strides[2] / 3 + 7) >> 3; // W - width (x direction) - vectorized for 8 element loads/stores per channel
        int globalThreads_y = dstGenericDescPtr->dims[2];                   // H - height (y direction)
        int globalThreads_z = dstGenericDescPtr->dims[1];                   // D - depth (z direction)

        for(int batchCount = 0; batchCount < dstGenericDescPtr->dims[0]; batchCount++)
        {
            hipLaunchKernelGGL(subtract_scalar_ndhwc_hip_tensor,
                               dim3(ceil((float)globalThreads_x/LOCAL_THREADS_X), ceil((float)globalThreads_y/LOCAL_THREADS_Y), ceil((float)globalThreads_z/LOCAL_THREADS_Z)),
                               dim3(LOCAL_THREADS_X, LOCAL_THREADS_Y, LOCAL_THREADS_Z),
                               0,
                               handle.GetStream(),
                               srcPtr + (batchCount * srcGenericDescPtr->strides[0]),
                               make_uint2(srcGenericDescPtr->strides[1], srcGenericDescPtr->strides[2]),
                               dstPtr + (batchCount * dstGenericDescPtr->strides[0]),
                               make_uint2(dstGenericDescPtr->strides[1], dstGenericDescPtr->strides[2]),
                               subtractTensor[batchCount],
                               &roiGenericPtrSrc[batchCount]);
        }
    }

    return RPP_SUCCESS;
}
