diff options
author | Roland Reichwein <mail@reichwein.it> | 2020-11-24 10:00:47 +0100 |
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committer | Roland Reichwein <mail@reichwein.it> | 2020-11-24 10:00:47 +0100 |
commit | 926b44301aa339b7a204f709959ee44b6ee95902 (patch) | |
tree | 7332570f3d6b553887f144a91e62e21dfa22a4af /asm/intel64/encode.cpp | |
parent | 61db05a4127790da3219fccce87c34aa890d1d08 (diff) |
Implement Shift Left (WIP)
Diffstat (limited to 'asm/intel64/encode.cpp')
-rw-r--r-- | asm/intel64/encode.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/asm/intel64/encode.cpp b/asm/intel64/encode.cpp index d3bfd91..6c18d1c 100644 --- a/asm/intel64/encode.cpp +++ b/asm/intel64/encode.cpp @@ -6,6 +6,7 @@ #include "byteorder.h" #include "minicc.h" +#include <algorithm> #include <exception> namespace { @@ -170,6 +171,35 @@ std::vector<std::shared_ptr<Chunk>> makeDivValue(const FlowGraph::Data& data, co throw std::runtime_error("ICE: Unsupported type for operand data at div: "s + demangle(typeid(data_storage))); } +std::shared_ptr<Op> makeShiftLeftValue(const FlowGraph::Data& data, const FlowGraph::Graph& graph) +{ + if (data.type() != FlowGraph::DataType::Int) { + throw std::runtime_error("Bad type for operand: "s + std::to_string(int(data.type()))); + } + + if (!data.storage()) + throw std::runtime_error("ICE: Operand storage is 0"); + + auto& data_storage{*data.storage()}; + if (typeid(data_storage) == typeid(FlowGraph::Constant)) { + FlowGraph::Constant& value {dynamic_cast<FlowGraph::Constant&>(data_storage)}; + if (value.value().size() < sizeof(uint32_t)) + throw std::runtime_error("ICE: Int data from operand needs at least 4 bytes, got "s + std::to_string(value.value().size())); + + uint32_t immediate = endian::from_little32(value.value()); + immediate = std::min(immediate, uint32_t(0xFF)); + + return makeOp("shl", Asm::Args{{Asm::Args::Register32("eax"), Asm::Args::Immediate8(static_cast<uint8_t>(immediate))}}); + } else if (typeid(data_storage) == typeid(FlowGraph::TemporaryStorage)) { + //FlowGraph::TemporaryStorage& storage {dynamic_cast<FlowGraph::TemporaryStorage&>(data_storage)}; + + index_t index { graph.scope()->indexOfData(data)}; + // makeOp("mov", Asm::Args{{Asm::Args::Register32("ecx"), Asm::Args::Mem32Ptr64("rbp", int32_t(index + 1) * -4)}}); // TODO: return list of ops; limit ecx to 0xff; implement shr x, cl + return makeOp("nop");//makeOp("shl", Asm::Args{{Asm::Args::Register32("eax"), Asm::Args::Register8("cl")}}); + } else + throw std::runtime_error("ICE: Unsupported type for operand data at shift left: "s + demangle(typeid(data_storage))); +} + } // namespace void Asm::toMachineCode(const FlowGraph::Graph& graph, Segment& segment) @@ -238,6 +268,10 @@ void Asm::toMachineCode(const FlowGraph::Graph& graph, Segment& segment) segment.append(makeDivValue(operands[2], graph)); segment.append(parseAsm("mov eax, edx")); // remainder is in edx segment.push_back(makeStoreValue(operands[0], graph)); + } else if (op.type() == FlowGraph::BinaryOperationType::ShiftLeft) { + segment.push_back(makeLoadValue(operands[1], graph)); + segment.push_back(makeShiftLeftValue(operands[2], graph)); + segment.push_back(makeStoreValue(operands[0], graph)); } else throw std::runtime_error("ICE: Asm: Unsupported binary operation type: "s + std::to_string(static_cast<int>(op.type()))); |