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Interface for new ABI encoder.

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This commit is contained in:
chriseth 2017-08-07 16:46:09 +02:00
parent 42fe8a2cb1
commit 4630b3315a
2 changed files with 40 additions and 0 deletions
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32
libsolidity/codegen/CompilerUtils.cpp
View File

@ -25,6 +25,7 @@
#include <libevmasm/Instruction.h>
#include <libsolidity/codegen/ArrayUtils.h>
#include <libsolidity/codegen/LValue.h>
#include <libsolidity/codegen/ABIFunctions.h>
using namespace std;
@ -180,8 +181,17 @@ void CompilerUtils::encodeToMemory(
t = t->mobileType()->interfaceType(_encodeAsLibraryTypes)->encodingType();
}
bool activateNewEncoder = false;
if (_givenTypes.empty())
return;
else if (activateNewEncoder && _padToWordBoundaries && !_copyDynamicDataInPlace)
{
// Use the new JULIA-based encoding function
auto stackHeightBefore = m_context.stackHeight();
abiEncode(_givenTypes, targetTypes, _encodeAsLibraryTypes);
solAssert(stackHeightBefore - m_context.stackHeight() == sizeOnStack(_givenTypes), "");
return;
}
// Stack during operation:
// <v1> <v2> ... <vn> <mem_start> <dyn_head_1> ... <dyn_head_r> <end_of_mem>
@ -289,6 +299,28 @@ void CompilerUtils::encodeToMemory(
popStackSlots(argSize + dynPointers + 1);
}
void CompilerUtils::abiEncode(
TypePointers const& _givenTypes,
TypePointers const& _targetTypes,
bool _encodeAsLibraryTypes
)
{
// stack: <$value0> <$value1> ... <$value(n-1)> <$headStart>
vector<string> variables;
size_t numValues = sizeOnStack(_givenTypes);
for (size_t i = 0; i < numValues; ++i)
variables.push_back("$value" + to_string(i));
variables.push_back("$headStart");
ABIFunctions funs;
string routine = funs.tupleEncoder(_givenTypes, _targetTypes, _encodeAsLibraryTypes);
routine += funs.requestedFunctions();
m_context.appendInlineAssembly("{" + routine + "}", variables);
// Remove everyhing except for "value0" / the final memory pointer.
popStackSlots(numValues);
}
void CompilerUtils::zeroInitialiseMemoryArray(ArrayType const& _type)
{
auto repeat = m_context.newTag();

8
libsolidity/codegen/CompilerUtils.h
View File

@ -103,6 +103,14 @@ public:
bool _encodeAsLibraryTypes = false
);
/// Special case of @a encodeToMemory which assumes that everything is padded to words
/// and dynamic data is not copied in place (i.e. a proper ABI encoding).
void abiEncode(
TypePointers const& _givenTypes,
TypePointers const& _targetTypes,
bool _encodeAsLibraryTypes = false
);
/// Zero-initialises (the data part of) an already allocated memory array.
/// Length has to be nonzero!
/// Stack pre: <length> <memptr>