Adds a struct representing everything a LLVM value might map to in TCG, this includes:
* TCGv (IrValue); * TCGv_ptr (IrPtr); * TCGv_env (IrEnv); * TCGLabel (IrLabel); * tcg_constant_*() (IrConst); * 123123ull (IrImmediate); * intptr_t gvec_vector (IrPtrToOffset). NOTE: Patch is subject to change due to rework of the TcgV type system. There is quite significant overlap in handling IrConst/IrImmediate and any other type with the ConstantExpression bool set. Space required for each TcgV can also be reduced by moving to a union. Signed-off-by: Anton Johansson <a...@rev.ng> --- .../helper-to-tcg/passes/backend/TcgType.h | 133 ++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 subprojects/helper-to-tcg/passes/backend/TcgType.h diff --git a/subprojects/helper-to-tcg/passes/backend/TcgType.h b/subprojects/helper-to-tcg/passes/backend/TcgType.h new file mode 100644 index 0000000000..36ebdbe5cb --- /dev/null +++ b/subprojects/helper-to-tcg/passes/backend/TcgType.h @@ -0,0 +1,133 @@ +// +// Copyright(c) 2024 rev.ng Labs Srl. All Rights Reserved. +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, see <http://www.gnu.org/licenses/>. +// + +#pragma once + +#include <llvm/ADT/Optional.h> +#include <llvm/ADT/StringRef.h> + +#include <assert.h> +#include <stdint.h> +#include <string> + +enum TcgVKind : uint8_t { + IrValue, + IrConst, + IrEnv, + IrImmediate, + IrPtr, + IrPtrToOffset, + IrLabel, +}; + +// Counter incremented for every TcgV created, also used in the creation of +// unique names (e.g. varr_10 for an array). +extern uint32_t VarIndex; + +struct TcgV { + uint16_t Id; + std::string Name; + + uint32_t TcgSize; + uint8_t LlvmSize; + uint8_t VectorElementCount; + + TcgVKind Kind; + + bool ConstantExpression = false; + + static TcgV makeVector(uint32_t VectorWidthBits, uint32_t ElementWidthBits, + uint32_t ElementCount) + { + return TcgV("", VectorWidthBits, ElementWidthBits, ElementCount, + IrPtrToOffset); + } + + static TcgV makeImmediate(llvm::StringRef Name, uint32_t TcgWidth, + uint32_t LlvmWidth) + { + return TcgV(Name.str(), TcgWidth, LlvmWidth, 1, IrImmediate); + } + + static TcgV makeTemp(uint32_t TcgWidth, uint32_t LlvmWidth, TcgVKind Kind) + { + return TcgV("", TcgWidth, LlvmWidth, 1, Kind); + } + + static TcgV makeConstantExpression(llvm::StringRef Expression, + uint32_t TcgWidth, uint32_t LlvmWidth, + TcgVKind Kind) + { + TcgV Tcg(Expression.str(), TcgWidth, LlvmWidth, 1, Kind); + Tcg.ConstantExpression = true; + return Tcg; + } + + static TcgV makeLabel() { return TcgV("", 32, 32, 1, IrLabel); } + + TcgV(std::string Name, uint32_t TcgSize, uint32_t LlvmSize, + uint32_t VectorElementCount, TcgVKind Kind) + : Id(VarIndex++), Name(Name), TcgSize(TcgSize), LlvmSize(LlvmSize), + VectorElementCount(VectorElementCount), Kind(Kind) + { + assert(verifySize()); + } + + // We make the following assumptions about TcgSize and LLvmSize: + // - TcgSize either 32- or 64-bit; + // - LlvmSize either 1-,8-,16-,32-,64-,or 128-bit. + // We also assume that there are only these valid combinations of + // (TcgSize, LlvmSize): + // - (64, 64) uint64_t + // - (64, 1) bool + // - (32, 32) uint32_t + // - (32, 16) uint16_t + // - (32, 8) uint8_t + // - (32, 1) bool + // So we try to fit the variables in the smallest possible TcgSize, + // with the exception of booleans which need to able to be 64-bit + // when dealing with conditions. + bool verifySize() + { + return (LlvmSize == 1 || LlvmSize == 8 || LlvmSize == 16 || + LlvmSize == 32 || LlvmSize == 64) && + (LlvmSize <= TcgSize); + } + + bool operator==(const TcgV &Other) const { return Other.Id == Id; } + bool operator!=(const TcgV &Other) const { return !operator==(Other); } +}; + +inline uint64_t llvmToTcgSize(uint64_t LlvmSize) +{ + return (LlvmSize <= 32) ? 32 : 64; +} + +inline uint32_t vectorSizeInBytes(const TcgV &Vec) +{ + assert(Vec.Kind == IrPtrToOffset); + return Vec.LlvmSize * Vec.VectorElementCount / 8; +} + +struct TcgBinOp { + std::string Code; +}; + +struct TcgVecBinOp { + std::string Code; + llvm::Optional<uint32_t> RequiredOp2Size; +}; -- 2.45.2
