Add FLP instruction

src/fox32.pest

@@ -108,7 +108,8 @@ instruction_one = @{
     "push"  |
     "pop"   |
     "int"   |
-    "tlb"
+    "tlb"   |
+    "flp"
 }
 
 instruction_two = @{

src/main.rs

@@ -181,6 +181,7 @@ enum InstructionOne {
     Pop,
     Int,
     Tlb,
+    Flp,
 }
 
 #[derive(PartialEq, Debug, Clone, Copy)]
@@ -904,6 +905,7 @@ fn parse_instruction_one(pair: pest::iterators::Pair<Rule>, mut operand: AstNode
             "pop"   => InstructionOne::Pop,
             "int"   => InstructionOne::Int,
             "tlb"   => InstructionOne::Tlb,
+            "flp"   => InstructionOne::Flp,
             _ => panic!("Unsupported conditional instruction (one): {}", pair.as_str()),
         },
         operand: Box::new(operand),
@@ -1045,6 +1047,7 @@ fn instruction_to_byte(node: &AstNode) -> u8 {
                 InstructionOne::Pop   => 0x1A | size_to_byte(size),
                 InstructionOne::Int   => 0x2C | size_to_byte(size),
                 InstructionOne::Tlb   => 0x2D | size_to_byte(size),
+                InstructionOne::Flp   => 0x3D | size_to_byte(size),
             }
         }
         AstNode::OperationTwo {size, instruction, ..} => {