Fix comparing result

hal_test.go

@@ -158,13 +158,6 @@ func TestNewton2(t *testing.T) {
 		"22 SUBNUM 3", // (8x⁶ + 3x²) - 3
 		"23 STORE 15", // Result in reg 15
 
-		// This is our exit condition:
-		// We compare the current result with the last calculated result, if both are equal, we exit
-		"24 SUB 50",      // 50 contains the last result
-		"25 JUMPNULL 45", // If both are equal, we exit
-		"26 LOAD 15",     // Otherwise load reg 15 again, store it as the current last result and continue
-		"27 STORE 50",
-
 		// f'(x)
 		"30 LOAD 20",   // x⁵ which we saved earlier while calculating x⁶
 		"31 MULNUM 48", // x⁵ * 48
@@ -179,11 +172,22 @@ func TestNewton2(t *testing.T) {
 		"41 DIV 25",    // f(x) / f'(x)
 		"42 MULNUM -1", // Invert the result
 		"43 ADD 10",    // Add x: Because we inverted the result before, we can do this instead of SUB - lets us reuse the content of the accumulator
-		"44 JUMP 03",   // Go to the beginning
 
-		"45 LOAD 10", // Load the result
-		"46 OUT 1",   // Print t
-		"47 STOP",
+		"44 STORE 35", // Reg 35 now contains the end result of x - f(x) / f'(x)
+
+		// This is our exit condition:
+		// We compare the current result with the last calculated result, if both are equal, we exit
+		"50 SUB 50",      // Reg 50 contains the last result
+		"51 JUMPNULL 60", // If both are equal, we exit
+		"52 LOAD 35",     // Otherwise load reg 15 again, store it as the current last result and continue
+		"53 STORE 50",
+
+		// Go to the beginning
+		"54 JUMP 03",
+
+		"60 LOAD 10", // Load the result
+		"61 OUT 1",   // Print it
+		"62 STOP",
 	}
 
 	program, err := parser.ParseProgram(input)