examples/complex: and bugfixes

examples/add/add.s

@@ -3,8 +3,8 @@
 
 // func Add(x uint64, y uint64) uint64
 TEXT ·Add(SB),0,$0-24
-	MOVQ	x(FP), CX
-	MOVQ	y+8(FP), AX
-	ADDQ	CX, AX
+	MOVQ	x(FP), AX
+	MOVQ	y+8(FP), CX
+	ADDQ	AX, CX
 	MOVQ	CX, ret+16(FP)
 	RET	

examples/add/add_test.go

@@ -8,5 +8,8 @@ import (
 //go:generate go run asm.go -out add.s -stubs stub.go
 
 func TestAdd(t *testing.T) {
-	quick.CheckEqual(Add, func(x, y uint64) uint64 { return x + y }, nil)
+	expect := func(x, y uint64) uint64 { return x + y }
+	if err := quick.CheckEqual(Add, expect, nil); err != nil {
+		t.Fatal(err)
+	}
 }

examples/add/asm.go

@@ -11,7 +11,7 @@ func main() {
 	x := Load(Param("x"), GP64v())
 	y := Load(Param("y"), GP64v())
 	ADDQ(x, y)
-	Store(x, ReturnIndex(0))
+	Store(y, ReturnIndex(0))
 	RET()
 	Generate()
 }