mirror of
https://github.com/luau-lang/luau.git
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272 lines
7.5 KiB
C++
272 lines
7.5 KiB
C++
// This file is part of the Luau programming language and is licensed under MIT License; see LICENSE.txt for details
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#include "Luau/AssemblyBuilderA64.h"
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#include "Luau/StringUtils.h"
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#include "doctest.h"
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#include <string.h>
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using namespace Luau::CodeGen;
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static std::string bytecodeAsArray(const std::vector<uint8_t>& bytecode)
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{
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std::string result = "{";
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for (size_t i = 0; i < bytecode.size(); i++)
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Luau::formatAppend(result, "%s0x%02x", i == 0 ? "" : ", ", bytecode[i]);
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return result.append("}");
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}
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static std::string bytecodeAsArray(const std::vector<uint32_t>& code)
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{
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std::string result = "{";
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for (size_t i = 0; i < code.size(); i++)
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Luau::formatAppend(result, "%s0x%08x", i == 0 ? "" : ", ", code[i]);
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return result.append("}");
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}
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class AssemblyBuilderA64Fixture
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{
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public:
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bool check(void (*f)(AssemblyBuilderA64& build), std::vector<uint32_t> code, std::vector<uint8_t> data = {})
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{
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AssemblyBuilderA64 build(/* logText= */ false);
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f(build);
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build.finalize();
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if (build.code != code)
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{
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printf("Expected code: %s\nReceived code: %s\n", bytecodeAsArray(code).c_str(), bytecodeAsArray(build.code).c_str());
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return false;
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}
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if (build.data != data)
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{
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printf("Expected data: %s\nReceived data: %s\n", bytecodeAsArray(data).c_str(), bytecodeAsArray(build.data).c_str());
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return false;
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}
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return true;
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}
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};
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// armconverter.com can be used to validate instruction sequences
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TEST_SUITE_BEGIN("A64Assembly");
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#define SINGLE_COMPARE(inst, ...) \
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CHECK(check( \
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[](AssemblyBuilderA64& build) { \
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build.inst; \
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}, \
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{__VA_ARGS__}))
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "Unary")
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{
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SINGLE_COMPARE(neg(x0, x1), 0xCB0103E0);
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SINGLE_COMPARE(neg(w0, w1), 0x4B0103E0);
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SINGLE_COMPARE(mvn(x0, x1), 0xAA2103E0);
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SINGLE_COMPARE(clz(x0, x1), 0xDAC01020);
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SINGLE_COMPARE(clz(w0, w1), 0x5AC01020);
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SINGLE_COMPARE(rbit(x0, x1), 0xDAC00020);
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SINGLE_COMPARE(rbit(w0, w1), 0x5AC00020);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "Binary")
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{
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// reg, reg
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SINGLE_COMPARE(add(x0, x1, x2), 0x8B020020);
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SINGLE_COMPARE(add(w0, w1, w2), 0x0B020020);
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SINGLE_COMPARE(add(x0, x1, x2, 7), 0x8B021C20);
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SINGLE_COMPARE(sub(x0, x1, x2), 0xCB020020);
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SINGLE_COMPARE(and_(x0, x1, x2), 0x8A020020);
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SINGLE_COMPARE(orr(x0, x1, x2), 0xAA020020);
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SINGLE_COMPARE(eor(x0, x1, x2), 0xCA020020);
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SINGLE_COMPARE(lsl(x0, x1, x2), 0x9AC22020);
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SINGLE_COMPARE(lsl(w0, w1, w2), 0x1AC22020);
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SINGLE_COMPARE(lsr(x0, x1, x2), 0x9AC22420);
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SINGLE_COMPARE(asr(x0, x1, x2), 0x9AC22820);
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SINGLE_COMPARE(ror(x0, x1, x2), 0x9AC22C20);
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SINGLE_COMPARE(cmp(x0, x1), 0xEB01001F);
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// reg, imm
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SINGLE_COMPARE(add(x3, x7, 78), 0x910138E3);
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SINGLE_COMPARE(add(w3, w7, 78), 0x110138E3);
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SINGLE_COMPARE(sub(w3, w7, 78), 0x510138E3);
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SINGLE_COMPARE(cmp(w0, 42), 0x7100A81F);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "Loads")
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{
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// address forms
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SINGLE_COMPARE(ldr(x0, x1), 0xF9400020);
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SINGLE_COMPARE(ldr(x0, mem(x1, 8)), 0xF9400420);
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SINGLE_COMPARE(ldr(x0, mem(x1, x7)), 0xF8676820);
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SINGLE_COMPARE(ldr(x0, mem(x1, -7)), 0xF85F9020);
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// load sizes
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SINGLE_COMPARE(ldr(x0, x1), 0xF9400020);
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SINGLE_COMPARE(ldr(w0, x1), 0xB9400020);
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SINGLE_COMPARE(ldrb(w0, x1), 0x39400020);
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SINGLE_COMPARE(ldrh(w0, x1), 0x79400020);
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SINGLE_COMPARE(ldrsb(x0, x1), 0x39800020);
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SINGLE_COMPARE(ldrsb(w0, x1), 0x39C00020);
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SINGLE_COMPARE(ldrsh(x0, x1), 0x79800020);
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SINGLE_COMPARE(ldrsh(w0, x1), 0x79C00020);
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SINGLE_COMPARE(ldrsw(x0, x1), 0xB9800020);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "Stores")
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{
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// address forms
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SINGLE_COMPARE(str(x0, x1), 0xF9000020);
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SINGLE_COMPARE(str(x0, mem(x1, 8)), 0xF9000420);
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SINGLE_COMPARE(str(x0, mem(x1, x7)), 0xF8276820);
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SINGLE_COMPARE(strh(w0, mem(x1, -7)), 0x781F9020);
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// store sizes
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SINGLE_COMPARE(str(x0, x1), 0xF9000020);
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SINGLE_COMPARE(str(w0, x1), 0xB9000020);
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SINGLE_COMPARE(strb(w0, x1), 0x39000020);
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SINGLE_COMPARE(strh(w0, x1), 0x79000020);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "Moves")
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{
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SINGLE_COMPARE(mov(x0, x1), 0xAA0103E0);
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SINGLE_COMPARE(mov(w0, w1), 0x2A0103E0);
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SINGLE_COMPARE(mov(x0, 42), 0xD2800540);
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SINGLE_COMPARE(mov(w0, 42), 0x52800540);
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SINGLE_COMPARE(movk(x0, 42, 16), 0xF2A00540);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "ControlFlow")
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{
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// Jump back
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CHECK(check(
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[](AssemblyBuilderA64& build) {
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Label start = build.setLabel();
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build.mov(x0, x1);
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build.b(ConditionA64::Equal, start);
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},
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{0xAA0103E0, 0x54FFFFE0}));
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// Jump forward
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CHECK(check(
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[](AssemblyBuilderA64& build) {
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Label skip;
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build.b(ConditionA64::Equal, skip);
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build.mov(x0, x1);
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build.setLabel(skip);
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},
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{0x54000040, 0xAA0103E0}));
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// Jumps
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CHECK(check(
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[](AssemblyBuilderA64& build) {
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Label skip;
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build.b(ConditionA64::Equal, skip);
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build.cbz(x0, skip);
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build.cbnz(x0, skip);
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build.setLabel(skip);
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build.b(skip);
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},
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{0x54000060, 0xB4000040, 0xB5000020, 0x5400000E}));
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// Basic control flow
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SINGLE_COMPARE(br(x0), 0xD61F0000);
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SINGLE_COMPARE(blr(x0), 0xD63F0000);
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SINGLE_COMPARE(ret(), 0xD65F03C0);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "StackOps")
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{
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SINGLE_COMPARE(mov(x0, sp), 0x910003E0);
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SINGLE_COMPARE(mov(sp, x0), 0x9100001F);
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SINGLE_COMPARE(add(sp, sp, 4), 0x910013FF);
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SINGLE_COMPARE(sub(sp, sp, 4), 0xD10013FF);
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SINGLE_COMPARE(add(x0, sp, 4), 0x910013E0);
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SINGLE_COMPARE(sub(sp, x0, 4), 0xD100101F);
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SINGLE_COMPARE(ldr(x0, mem(sp, 8)), 0xF94007E0);
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SINGLE_COMPARE(str(x0, mem(sp, 8)), 0xF90007E0);
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}
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TEST_CASE_FIXTURE(AssemblyBuilderA64Fixture, "Constants")
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{
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// clang-format off
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CHECK(check(
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[](AssemblyBuilderA64& build) {
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char arr[12] = "hello world";
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build.adr(x0, arr, 12);
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build.adr(x0, uint64_t(0x1234567887654321));
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build.adr(x0, 1.0);
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},
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{
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0x10ffffa0, 0x10ffff20, 0x10fffec0
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},
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{
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x3f,
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0x21, 0x43, 0x65, 0x87, 0x78, 0x56, 0x34, 0x12,
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0x00, 0x00, 0x00, 0x00, // 4b padding to align double
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'h', 'e', 'l', 'l', 'o', ' ', 'w', 'o', 'r', 'l', 'd', 0x0,
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}));
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// clang-format on
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}
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TEST_CASE("LogTest")
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{
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AssemblyBuilderA64 build(/* logText= */ true);
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build.add(sp, sp, 4);
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build.add(w0, w1, w2);
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build.add(x0, x1, x2, 2);
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build.add(w7, w8, 5);
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build.add(x7, x8, 5);
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build.ldr(x7, x8);
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build.ldr(x7, mem(x8, 8));
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build.ldr(x7, mem(x8, x9));
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build.mov(x1, x2);
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build.movk(x1, 42, 16);
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build.cmp(x1, x2);
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build.blr(x0);
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Label l;
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build.b(ConditionA64::Plus, l);
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build.cbz(x7, l);
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build.setLabel(l);
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build.ret();
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build.finalize();
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std::string expected = R"(
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add sp,sp,#4
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add w0,w1,w2
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add x0,x1,x2 LSL #2
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add w7,w8,#5
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add x7,x8,#5
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ldr x7,[x8]
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ldr x7,[x8,#8]
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ldr x7,[x8,x9]
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mov x1,x2
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movk x1,#42 LSL #16
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cmp x1,x2
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blr x0
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b.pl .L1
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cbz x7,.L1
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.L1:
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ret
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)";
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CHECK("\n" + build.text == expected);
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}
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TEST_SUITE_END();
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