Implemented more arm64 instructions

src/arm/Mul_test.go

@@ -0,0 +1,44 @@
+package arm_test
+
+import (
+	"testing"
+
+	"git.urbach.dev/cli/q/src/arm"
+	"git.urbach.dev/cli/q/src/cpu"
+	"git.urbach.dev/go/assert"
+)
+
+func TestMulRegisterRegister(t *testing.T) {
+	usagePatterns := []struct {
+		Destination cpu.Register
+		Source      cpu.Register
+		Operand     cpu.Register
+		Code        uint32
+	}{
+		{arm.X0, arm.X1, arm.X2, 0x9B027C20},
+	}
+
+	for _, pattern := range usagePatterns {
+		t.Logf("mul %s, %s, %s", pattern.Destination, pattern.Source, pattern.Operand)
+		code := arm.MulRegisterRegister(pattern.Destination, pattern.Source, pattern.Operand)
+		assert.DeepEqual(t, code, pattern.Code)
+	}
+}
+
+func TestMultiplySubtract(t *testing.T) {
+	usagePatterns := []struct {
+		Destination cpu.Register
+		Source      cpu.Register
+		Operand     cpu.Register
+		Extra       cpu.Register
+		Code        uint32
+	}{
+		{arm.X0, arm.X1, arm.X2, arm.X3, 0x9B028C20},
+	}
+
+	for _, pattern := range usagePatterns {
+		t.Logf("msub %s, %s, %s, %s", pattern.Destination, pattern.Source, pattern.Operand, pattern.Extra)
+		code := arm.MultiplySubtract(pattern.Destination, pattern.Source, pattern.Operand, pattern.Extra)
+		assert.DeepEqual(t, code, pattern.Code)
+	}
+}