1 files changed, 91 insertions, 0 deletions
diff --git a/qtmips_machine/tests/testalu.cpp b/qtmips_machine/tests/testalu.cpp
index e69de29..37accdf 100644
--- a/qtmips_machine/tests/testalu.cpp
+++ b/qtmips_machine/tests/testalu.cpp
@@ -0,0 +1,91 @@
+#include "tst_machine.h"
+#include "alu.h"
+#include "qtmipsexception.h"
+
+void MachineTests::alu_data() {
+    QTest::addColumn<std::uint8_t>("op");
+    QTest::addColumn<std::uint32_t>("s");
+    QTest::addColumn<std::uint32_t>("t");
+    QTest::addColumn<std::uint8_t>("sa");
+    QTest::addColumn<std::uint32_t>("res");
+
+    // TODO SLL-SRAV
+    QTest::newRow("ADD") << (std::uint8_t)ALU_OP_ADD \
+                         << (std::uint32_t)24 \
+                         << (std::uint32_t)66 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)90;
+    QTest::newRow("ADDU") << (std::uint8_t)ALU_OP_ADDU \
+                         << (std::uint32_t)24 \
+                         << (std::uint32_t)66 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)90;
+    QTest::newRow("SUB") << (std::uint8_t)ALU_OP_SUB \
+                         << (std::uint32_t)66 \
+                         << (std::uint32_t)24 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)42;
+    QTest::newRow("SUBU") << (std::uint8_t)ALU_OP_SUBU \
+                         << (std::uint32_t)24 \
+                         << (std::uint32_t)66 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)-42;
+    QTest::newRow("AND") << (std::uint8_t)ALU_OP_AND \
+                         << (std::uint32_t)0xA81 \
+                         << (std::uint32_t)0x603 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)0x201;
+    QTest::newRow("OR") << (std::uint8_t)ALU_OP_OR \
+                         << (std::uint32_t)0xA81 \
+                         << (std::uint32_t)0x603 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)0xE83;
+    QTest::newRow("XOR") << (std::uint8_t)ALU_OP_XOR \
+                         << (std::uint32_t)0xA81 \
+                         << (std::uint32_t)0x603 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)0xC82;
+    QTest::newRow("NOR") << (std::uint8_t)ALU_OP_NOR \
+                         << (std::uint32_t)0xA81 \
+                         << (std::uint32_t)0x603 \
+                         << (std::uint8_t)0 \
+                         << (std::uint32_t)0xFFFFF17C;
+    // TODO SLT-SLTU
+}
+
+void MachineTests::alu() {
+    QFETCH(std::uint8_t, op);
+    QFETCH(std::uint32_t, s);
+    QFETCH(std::uint32_t, t);
+    QFETCH(std::uint8_t, sa);
+    QFETCH(std::uint32_t, res);
+
+    QCOMPARE(alu_operate((enum AluOp)op, s , t, sa), res);
+}
+
+void MachineTests::alu_except_data() {
+    QTest::addColumn<std::uint8_t>("op");
+    QTest::addColumn<std::uint32_t>("s");
+    QTest::addColumn<std::uint32_t>("t");
+    // Note no sa as shift unstruction has no exceptions
+
+    QTest::newRow("ADD") << (std::uint8_t)ALU_OP_ADD \
+                         << (std::uint32_t)0x8fffffff \
+                         << (std::uint32_t)0x90000000;
+    QTest::newRow("SUB") << (std::uint8_t)ALU_OP_SUB \
+                         << (std::uint32_t)3 \
+                         << (std::uint32_t)4;
+    // Just test that we can throw unsupported ALU operation
+    QTest::newRow("?") << (std::uint8_t)ALU_OP_LAST \
+                         << (std::uint32_t)0 \
+                         << (std::uint32_t)0;
+}
+
+void MachineTests::alu_except() {
+    QFETCH(std::uint8_t, op);
+    QFETCH(std::uint32_t, s);
+    QFETCH(std::uint32_t, t);
+
+    // Only runtime exception is expected as any other exception is a bug
+    QVERIFY_EXCEPTION_THROWN(alu_operate((enum AluOp)op, s , t, 0), QtMipsExceptionRuntime);
+}