all: reimplement inline assembly (#8645)

examples/asm.v

@@ -0,0 +1,16 @@
+fn main() {
+	a := 100
+	b := 20
+	mut c := 0
+	asm amd64 {
+		mov eax, a
+		add eax, b
+		mov c, eax
+		; =r (c) // output 
+		; r (a) // input 
+		  r (b)
+	}
+	println('a: $a') // 100
+	println('b: $b') // 20
+	println('c: $c') // 120
+}

examples/fibonacci.v

@@ -1,18 +1,18 @@
 // This program displays the fibonacci sequence
-import os
+// import os
 
 fn main() {
 	// Check for user input
-	if os.args.len != 2 {
-		println('usage: fibonacci [rank]')
+//if os.args.len != 2 {
+//		println('usage: fibonacci [rank]')
 
 		// Exit
-		return
-	}
+//		return
+//	}
 
 	// Parse first argument and cast it to int
-	stop := os.args[1].int()
-
+//	stop := os.args[1].int()
+	stop := 23
 	// Can only calculate correctly until rank 92
 	if stop > 92 {
 		println('rank must be 92 or less')
@@ -20,10 +20,10 @@ fn main() {
 	}
 
 	// Three consecutive terms of the sequence
-	mut a := u64(0)
-	mut b := u64(0)
-	mut c := u64(1)
-
+	mut a := 0
+	mut b := 0
+	mut c := 1
+	println(a+c+c)
 	for _ in 0 .. stop {
 		// Set a and b to the next term
 		a = b