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43 lines
1.0 KiB
43 lines
1.0 KiB
10 years ago
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#include "Instruction.h"
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#include "preprocessor/llvm_includes_start.h"
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#include <llvm/ADT/APInt.h>
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#include "preprocessor/llvm_includes_end.h"
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namespace dev
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{
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namespace eth
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{
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namespace jit
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{
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llvm::APInt readPushData(code_iterator& _curr, code_iterator _end)
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{
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auto pushInst = *_curr;
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assert(Instruction(pushInst) >= Instruction::PUSH1 && Instruction(pushInst) <= Instruction::PUSH32);
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auto numBytes = pushInst - static_cast<size_t>(Instruction::PUSH1) + 1;
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llvm::APInt value(256, 0);
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++_curr; // Point the data
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for (decltype(numBytes) i = 0; i < numBytes; ++i)
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{
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byte b = (_curr != _end) ? *_curr++ : 0;
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value <<= 8;
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value |= b;
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}
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--_curr; // Point the last real byte read
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return value;
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}
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void skipPushData(code_iterator& _curr, code_iterator _end)
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{
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auto pushInst = *_curr;
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assert(Instruction(pushInst) >= Instruction::PUSH1 && Instruction(pushInst) <= Instruction::PUSH32);
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auto numBytes = pushInst - static_cast<size_t>(Instruction::PUSH1) + 1;
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--_end;
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for (decltype(numBytes) i = 0; i < numBytes && _curr < _end; ++i, ++_curr) {}
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}
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}
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}
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}
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