You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
39 lines
1.0 KiB
39 lines
1.0 KiB
#include "Instruction.h"
|
|
|
|
#include "preprocessor/llvm_includes_start.h"
|
|
#include <llvm/ADT/APInt.h>
|
|
#include "preprocessor/llvm_includes_end.h"
|
|
|
|
namespace dev
|
|
{
|
|
namespace evmjit
|
|
{
|
|
|
|
llvm::APInt readPushData(code_iterator& _curr, code_iterator _end)
|
|
{
|
|
auto pushInst = *_curr;
|
|
assert(Instruction(pushInst) >= Instruction::PUSH1 && Instruction(pushInst) <= Instruction::PUSH32);
|
|
auto numBytes = pushInst - static_cast<size_t>(Instruction::PUSH1) + 1;
|
|
llvm::APInt value(256, 0);
|
|
++_curr; // Point the data
|
|
for (decltype(numBytes) i = 0; i < numBytes; ++i)
|
|
{
|
|
byte b = (_curr != _end) ? *_curr++ : 0;
|
|
value <<= 8;
|
|
value |= b;
|
|
}
|
|
--_curr; // Point the last real byte read
|
|
return value;
|
|
}
|
|
|
|
void skipPushData(code_iterator& _curr, code_iterator _end)
|
|
{
|
|
auto pushInst = *_curr;
|
|
assert(Instruction(pushInst) >= Instruction::PUSH1 && Instruction(pushInst) <= Instruction::PUSH32);
|
|
auto numBytes = pushInst - static_cast<size_t>(Instruction::PUSH1) + 1;
|
|
--_end;
|
|
for (decltype(numBytes) i = 0; i < numBytes && _curr < _end; ++i, ++_curr) {}
|
|
}
|
|
|
|
}
|
|
}
|
|
|