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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <vector>
#include "src/v8.h"
#include "src/interpreter/bytecode-decoder.h"
#include "test/unittests/interpreter/bytecode-utils.h"
#include "test/unittests/test-utils.h"
namespace v8 {
namespace internal {
namespace interpreter {
TEST(BytecodeDecoder, DecodeBytecodeAndOperands) {
struct BytecodesAndResult {
const uint8_t bytecode[32];
const size_t length;
int parameter_count;
const char* output;
};
const BytecodesAndResult cases[] = {
{{B(LdaSmi), U8(1)}, 2, 0, " LdaSmi [1]"},
{{B(Wide), B(LdaSmi), U16(1000)}, 4, 0, " LdaSmi.Wide [1000]"},
{{B(ExtraWide), B(LdaSmi), U32(100000)},
6,
0,
"LdaSmi.ExtraWide [100000]"},
{{B(LdaSmi), U8(-1)}, 2, 0, " LdaSmi [-1]"},
{{B(Wide), B(LdaSmi), U16(-1000)}, 4, 0, " LdaSmi.Wide [-1000]"},
{{B(ExtraWide), B(LdaSmi), U32(-100000)},
6,
0,
"LdaSmi.ExtraWide [-100000]"},
{{B(Star), R8(5)}, 2, 0, " Star r5"},
{{B(Wide), B(Star), R16(136)}, 4, 0, " Star.Wide r136"},
{{B(Wide), B(Call), R16(134), R16(135), U16(2), U16(177)},
10,
0,
"Call.Wide r134, r135, #2, [177]"},
{{B(Ldar),
static_cast<uint8_t>(Register::FromParameterIndex(2, 3).ToOperand())},
2,
3,
" Ldar a1"},
{{B(Wide), B(CreateObjectLiteral), U16(513), U16(1027), U8(165),
R16(137)},
9,
0,
"CreateObjectLiteral.Wide [513], [1027], #165, r137"},
{{B(ExtraWide), B(JumpIfNull), U32(123456789)},
6,
0,
"JumpIfNull.ExtraWide [123456789]"},
};
for (size_t i = 0; i < arraysize(cases); ++i) {
// Generate reference string by prepending formatted bytes.
std::stringstream expected_ss;
std::ios default_format(nullptr);
default_format.copyfmt(expected_ss);
// Match format of BytecodeDecoder::Decode() for byte representations.
expected_ss.fill('0');
expected_ss.flags(std::ios::right | std::ios::hex);
for (size_t b = 0; b < cases[i].length; b++) {
expected_ss << std::setw(2) << static_cast<uint32_t>(cases[i].bytecode[b])
<< ' ';
}
expected_ss.copyfmt(default_format);
expected_ss << cases[i].output;
// Generate decoded byte output.
std::stringstream actual_ss;
BytecodeDecoder::Decode(actual_ss, cases[i].bytecode,
cases[i].parameter_count);
// Compare.
CHECK_EQ(actual_ss.str(), expected_ss.str());
}
}
} // namespace interpreter
} // namespace internal
} // namespace v8
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