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package inst_test
import (
"io/ioutil"
"reflect"
"strings"
"testing"
"github.com/mmcloughlin/avo/internal/gen"
"github.com/mmcloughlin/avo/internal/inst"
"github.com/mmcloughlin/avo/internal/test"
"github.com/mmcloughlin/avo/printer"
)
func TestHaveInstructions(t *testing.T) {
n := len(inst.Instructions)
t.Logf("number of instructions = %d", n)
if n == 0 {
t.Fatalf("no instructions")
}
}
func TestOpcodeDupes(t *testing.T) {
count := map[string]int{}
for _, i := range inst.Instructions {
count[i.Opcode]++
}
for opcode, n := range count {
if n > 1 {
t.Errorf("opcode %s appears %d times", opcode, n)
}
}
}
func TestFormDupes(t *testing.T) {
for _, i := range inst.Instructions {
if HasFormDupe(i) {
t.Errorf("%s has duplicate forms", i.Opcode)
}
}
}
func HasFormDupe(i inst.Instruction) bool {
n := len(i.Forms)
for a := 0; a < n; a++ {
for b := a + 1; b < n; b++ {
if reflect.DeepEqual(i.Forms[a], i.Forms[b]) {
return true
}
}
}
return false
}
func TestInstructionProperties(t *testing.T) {
for _, i := range inst.Instructions {
if len(i.Opcode) == 0 {
t.Errorf("empty opcode")
}
if len(i.Forms) == 0 {
t.Errorf("instruction %s has no forms", i.Opcode)
}
if len(i.Arities()) == 0 {
t.Errorf("instruction %s has empty arities list", i.Opcode)
}
if i.IsNiladic() && len(i.Forms) != 1 {
t.Errorf("%s breaks our expectation that niladic functions have one form", i.Opcode)
}
}
}
func TestAssembles(t *testing.T) {
t.Skip() // https://github.com/mmcloughlin/avo/issues/152
g := gen.NewAsmTest(printer.NewArgvConfig())
b, err := g.Generate(inst.Instructions)
if err != nil {
t.Fatal(err)
}
test.Assembles(t, b)
}
func TestLookup(t *testing.T) {
if _, found := inst.Lookup("CPUID"); !found {
t.Fatalf("missing CPUID")
}
if _, found := inst.Lookup(strings.Repeat("XXX", 13)); found {
t.Fatalf("lookup returns true on an absurd opcode")
}
}
func TestInstructionArities(t *testing.T) {
cases := map[string][]int{
"AESDEC": {2},
"EXTRACTPS": {3},
"SHRQ": {2, 3},
"VMOVHPD": {2, 3},
}
for opcode, expect := range cases {
i, ok := inst.Lookup(opcode)
if !ok {
t.Fatalf("could not find %s", opcode)
}
got := i.Arities()
if !reflect.DeepEqual(got, expect) {
t.Errorf("arity of %s is %v expected %v", opcode, got, expect)
}
}
}
func TestStdLibOpcodes(t *testing.T) {
b, err := ioutil.ReadFile("testdata/stdlibopcodes.txt")
if err != nil {
t.Fatal(err)
}
opcodes := strings.Fields(string(b))
for _, opcode := range opcodes {
if _, found := inst.Lookup(opcode); !found {
t.Errorf("missing instruction %s (used in stdlib asm)", opcode)
}
}
}
func TestCancellingInputs(t *testing.T) {
// Expect all instruction forms with cancelling inputs to have two input operands of register type.
//
// Reference: https://github.com/Maratyszcza/PeachPy/blob/01d15157a973a4ae16b8046313ddab371ea582db/peachpy/x86_64/instructions.py#L136-L138
//
// assert len(input_operands) == 2, "Instruction forms with cancelling inputs must have two inputs"
// assert all(map(lambda op: isinstance(op, Register), input_operands)), \
// "Both inputs of instruction form with cancelling inputs must be registers"
//
for _, i := range inst.Instructions {
for _, f := range i.Forms {
if !f.CancellingInputs {
continue
}
if len(f.ImplicitOperands) > 0 {
t.Errorf("%s: expected no implicit operands", i.Opcode)
}
// Expect two register inputs.
n := 0
for _, op := range f.Operands {
if op.Action.Read() {
n++
switch op.Type {
case "r8", "r16", "r32", "r64", "xmm", "ymm":
// pass
default:
t.Errorf("%s: unexpected operand type %q for self-cancelling input", i.Opcode, op.Type)
}
}
}
if n != 2 {
t.Errorf("%s: expected two inputs for self-cancelling form", i.Opcode)
}
}
}
}
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