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// Copyright 2023 The Dawn & Tint Authors
//
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// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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#include "src/tint/lang/spirv/writer/raise/handle_matrix_arithmetic.h"
#include <utility>
#include "src/tint/lang/core/fluent_types.h"
#include "src/tint/lang/core/ir/builder.h"
#include "src/tint/lang/core/ir/module.h"
#include "src/tint/lang/core/ir/validator.h"
#include "src/tint/lang/core/type/matrix.h"
#include "src/tint/lang/spirv/ir/builtin_call.h"
#include "src/tint/utils/ice/ice.h"
using namespace tint::core::fluent_types; // NOLINT
namespace tint::spirv::writer::raise {
namespace {
/// PIMPL state for the transform.
struct State {
/// The IR module.
core::ir::Module& ir;
/// The IR builder.
core::ir::Builder b{ir};
/// Process the module.
void Process() {
// Find and replace the instructions that need to be modified.
for (auto* inst : ir.Instructions()) {
if (auto* binary = inst->As<core::ir::CoreBinary>()) {
if (binary->LHS()->Type()->Is<core::type::Matrix>() ||
binary->RHS()->Type()->Is<core::type::Matrix>()) {
ReplaceBinary(binary);
}
} else if (auto* convert = inst->As<core::ir::Convert>()) {
if (convert->Result(0)->Type()->Is<core::type::Matrix>()) {
ReplaceConvert(convert);
}
}
}
}
/// Replace a binary matrix arithmetic instruction.
/// @param binary the instruction to replace
void ReplaceBinary(core::ir::Binary* binary) {
auto* lhs = binary->LHS();
auto* rhs = binary->RHS();
auto* lhs_ty = lhs->Type();
auto* rhs_ty = rhs->Type();
auto* ty = binary->Result(0)->Type();
b.InsertBefore(binary, [&] {
// Helper to replace the instruction with a column-wise operation.
auto column_wise = [&](auto op) {
auto* mat = ty->As<core::type::Matrix>();
Vector<core::ir::Value*, 4> args;
for (uint32_t col = 0; col < mat->columns(); col++) {
auto* lhs_col = b.Access(mat->ColumnType(), lhs, u32(col));
auto* rhs_col = b.Access(mat->ColumnType(), rhs, u32(col));
auto* add = b.Binary(op, mat->ColumnType(), lhs_col, rhs_col);
args.Push(add->Result(0));
}
b.ConstructWithResult(binary->DetachResult(), std::move(args));
};
switch (binary->Op()) {
case core::BinaryOp::kAdd:
column_wise(core::BinaryOp::kAdd);
break;
case core::BinaryOp::kSubtract:
column_wise(core::BinaryOp::kSubtract);
break;
case core::BinaryOp::kMultiply:
// Select the SPIR-V intrinsic that corresponds to the operation being
// performed.
if (lhs_ty->Is<core::type::Matrix>()) {
if (rhs_ty->Is<core::type::Scalar>()) {
b.CallWithResult<spirv::ir::BuiltinCall>(
binary->DetachResult(), spirv::BuiltinFn::kMatrixTimesScalar, lhs,
rhs);
} else if (rhs_ty->Is<core::type::Vector>()) {
b.CallWithResult<spirv::ir::BuiltinCall>(
binary->DetachResult(), spirv::BuiltinFn::kMatrixTimesVector, lhs,
rhs);
} else if (rhs_ty->Is<core::type::Matrix>()) {
b.CallWithResult<spirv::ir::BuiltinCall>(
binary->DetachResult(), spirv::BuiltinFn::kMatrixTimesMatrix, lhs,
rhs);
}
} else {
if (lhs_ty->Is<core::type::Scalar>()) {
b.CallWithResult<spirv::ir::BuiltinCall>(
binary->DetachResult(), spirv::BuiltinFn::kMatrixTimesScalar, rhs,
lhs);
} else if (lhs_ty->Is<core::type::Vector>()) {
b.CallWithResult<spirv::ir::BuiltinCall>(
binary->DetachResult(), spirv::BuiltinFn::kVectorTimesMatrix, lhs,
rhs);
}
}
break;
default:
TINT_UNREACHABLE() << "unhandled matrix arithmetic instruction";
}
});
binary->Destroy();
}
/// Replace a matrix convert instruction.
/// @param convert the instruction to replace
void ReplaceConvert(core::ir::Convert* convert) {
auto* arg = convert->Args()[core::ir::Convert::kValueOperandOffset];
auto* in_mat = arg->Type()->As<core::type::Matrix>();
auto* out_mat = convert->Result(0)->Type()->As<core::type::Matrix>();
b.InsertBefore(convert, [&] {
// Extract and convert each column separately.
Vector<core::ir::Value*, 4> args;
for (uint32_t c = 0; c < out_mat->columns(); c++) {
auto* col = b.Access(in_mat->ColumnType(), arg, u32(c));
auto* new_col = b.Convert(out_mat->ColumnType(), col);
args.Push(new_col->Result(0));
}
// Reconstruct the result matrix from the converted columns.
b.ConstructWithResult(convert->DetachResult(), std::move(args));
});
convert->Destroy();
}
};
} // namespace
Result<SuccessType> HandleMatrixArithmetic(core::ir::Module& ir) {
auto result = ValidateAndDumpIfNeeded(ir, "HandleMatrixArithmetic transform");
if (result != Success) {
return result.Failure();
}
State{ir}.Process();
return Success;
}
} // namespace tint::spirv::writer::raise