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/*========================== begin_copyright_notice ============================
Copyright (C) 2019-2021 Intel Corporation
SPDX-License-Identifier: MIT
============================= end_copyright_notice ===========================*/
#include "common/LLVMWarningsPush.hpp"
#include <optional>
#include "common/LLVMWarningsPop.hpp"
#include "Compiler/CISACodeGen/ComputeShaderBase.hpp"
#include "Compiler/CISACodeGen/CSWalkOrder.hpp"
#include <iStdLib/utility.h>
using namespace llvm;
namespace IGC {
CComputeShaderBase::CComputeShaderBase(Function *pFunc, CShaderProgram *pProgram, GenericShaderState &GState)
: CShader(pFunc, pProgram, GState) {}
CComputeShaderBase::~CComputeShaderBase() {}
std::optional<CS_WALK_ORDER> CComputeShaderBase::checkLegalWalkOrder(const std::array<uint32_t, 3> &Dims,
const WorkGroupWalkOrderMD &WO) {
auto is_pow2 = [](uint32_t dim) { return iSTD::IsPowerOfTwo(dim); };
const int walkorder_x = WO.dim0;
const int walkorder_y = WO.dim1;
const int walkorder_z = WO.dim2;
const uint32_t dim_x = Dims[0];
const uint32_t dim_y = Dims[1];
const uint32_t dim_z = Dims[2];
uint order0 = (walkorder_x == 0) ? 0 : (walkorder_y == 0) ? 1 : 2;
uint order1 = (walkorder_x == 1) ? 0 : (walkorder_y == 1) ? 1 : 2;
if (order0 != order1 &&
((order0 == 0 && is_pow2(dim_x)) || (order0 == 1 && is_pow2(dim_y)) || (order0 == 2 && is_pow2(dim_z))) &&
((order1 == 0 && is_pow2(dim_x)) || (order1 == 1 && is_pow2(dim_y)) || (order1 == 2 && is_pow2(dim_z)))) {
// Legal walk order for HW auto-gen
return getWalkOrderInPass(order0, order1);
}
return std::nullopt;
}
} // namespace IGC
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