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LibWasm: Implement memory.fill instruction

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Sam Atkins 2023-01-28 14:56:18 +00:00 • committed by Ali Mohammad Pur
parent e96c64cdb4
commit 42adba5ad4
1 changed files with 24 additions and 1 deletions
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25
Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
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@ -1,5 +1,6 @@
/* /*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org> * Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
* Copyright (c) 2023, Sam Atkins <atkinssj@serenityos.org>
* *
* SPDX-License-Identifier: BSD-2-Clause * SPDX-License-Identifier: BSD-2-Clause
*/ */
@ -615,6 +616,29 @@ void BytecodeInterpreter::interpret(Configuration& configuration, InstructionPoi
configuration.stack().peek() = Value((i32)-1); configuration.stack().peek() = Value((i32)-1);
return; return;
} }
// https://webassembly.github.io/spec/core/bikeshed/#exec-memory-fill
case Instructions::memory_fill.value(): {
auto address = configuration.frame().module().memories()[0];
auto instance = configuration.store().get(address);
auto count = configuration.stack().pop().get<Value>().to<i32>().value();
auto value = configuration.stack().pop().get<Value>().to<i32>().value();
auto destination_offset = configuration.stack().pop().get<Value>().to<i32>().value();
TRAP_IF_NOT(static_cast<size_t>(destination_offset + count) <= instance->data().size());
if (count == 0)
return;
Instruction synthetic_store_instruction {
Instructions::i32_store8,
Instruction::MemoryArgument { 0, 0 }
};
for (auto i = 0; i < count; ++i) {
store_to_memory(configuration, synthetic_store_instruction, { &value, sizeof(value) }, destination_offset);
}
return;
}
case Instructions::table_get.value(): case Instructions::table_get.value():
case Instructions::table_set.value(): case Instructions::table_set.value():
goto unimplemented; goto unimplemented;
@ -950,7 +974,6 @@ void BytecodeInterpreter::interpret(Configuration& configuration, InstructionPoi
} }
case Instructions::data_drop.value(): case Instructions::data_drop.value():
case Instructions::memory_copy.value(): case Instructions::memory_copy.value():
case Instructions::memory_fill.value():
case Instructions::table_init.value(): case Instructions::table_init.value():
case Instructions::elem_drop.value(): case Instructions::elem_drop.value():
case Instructions::table_copy.value(): case Instructions::table_copy.value():