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LibWasm: Move memory.init code together with other memory.foo impls

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And add a spec link while I'm at it.
This commit is contained in:
Sam Atkins 2023-01-28 15:28:54 +00:00 • committed by Ali Mohammad Pur
parent 330911a274
commit a2f42512c2
1 changed files with 24 additions and 23 deletions
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47
Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
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@ -672,6 +672,30 @@ void BytecodeInterpreter::interpret(Configuration& configuration, InstructionPoi
return;
}
// https://webassembly.github.io/spec/core/bikeshed/#exec-memory-init
case Instructions::memory_init.value(): {
auto data_index = instruction.arguments().get<DataIndex>();
auto& data_address = configuration.frame().module().datas()[data_index.value()];
auto& data = *configuration.store().get(data_address);
auto count = *configuration.stack().pop().get<Value>().to<i32>();
auto source_offset = *configuration.stack().pop().get<Value>().to<i32>();
auto destination_offset = *configuration.stack().pop().get<Value>().to<i32>();
TRAP_IF_NOT(count > 0);
TRAP_IF_NOT(source_offset + count > 0);
TRAP_IF_NOT(static_cast<size_t>(source_offset + count) <= data.size());
Instruction synthetic_store_instruction {
Instructions::i32_store8,
Instruction::MemoryArgument { 0, 0 }
};
for (size_t i = 0; i < (size_t)count; ++i) {
auto value = data.data()[source_offset + i];
store_to_memory(configuration, synthetic_store_instruction, { &value, sizeof(value) }, destination_offset + i);
}
return;
}
case Instructions::table_get.value():
case Instructions::table_set.value():
goto unimplemented;
@ -982,29 +1006,6 @@ void BytecodeInterpreter::interpret(Configuration& configuration, InstructionPoi
return unary_operation<double, i64, Operators::SaturatingTruncate<i64>>(configuration);
case Instructions::i64_trunc_sat_f64_u.value():
return unary_operation<double, i64, Operators::SaturatingTruncate<u64>>(configuration);
case Instructions::memory_init.value(): {
auto data_index = instruction.arguments().get<DataIndex>();
auto& data_address = configuration.frame().module().datas()[data_index.value()];
auto& data = *configuration.store().get(data_address);
auto count = *configuration.stack().pop().get<Value>().to<i32>();
auto source_offset = *configuration.stack().pop().get<Value>().to<i32>();
auto destination_offset = *configuration.stack().pop().get<Value>().to<i32>();
TRAP_IF_NOT(count > 0);
TRAP_IF_NOT(source_offset + count > 0);
TRAP_IF_NOT(static_cast<size_t>(source_offset + count) <= data.size());
Instruction synthetic_store_instruction {
Instructions::i32_store8,
Instruction::MemoryArgument { 0, 0 }
};
for (size_t i = 0; i < (size_t)count; ++i) {
auto value = data.data()[source_offset + i];
store_to_memory(configuration, synthetic_store_instruction, { &value, sizeof(value) }, destination_offset + i);
}
return;
}
case Instructions::data_drop.value():
case Instructions::table_init.value():
case Instructions::elem_drop.value():