Add print instruction to print the value of a register to the console

README.md

@@ -14,9 +14,10 @@ A virtual machine for controlling a wifi led strip.
 | load (rgp, rgd)     | loads the value the pointer register points to into the data register        | 0x04 |
 | clear \<rg>         | clears a register (sets it to 0x00)                                          | 0x05 |
 | write (rgd, rgp)    | writes the value in the data register to the address of the pointer register | 0x06 |
-| label <u32>        | creates a label at the current position.                                     | 0x07 |
+| label <u32>         | creates a label at the current position.                                     | 0x07 |
 | goto (rgl)          | goes to the label with name rgl                                              | 0x08 |
 | debug (*)           | prints out the state for debug information                                   | 0x09 |
+| print <rg>          | prints the value of a register                                               | 0x0A |
 | add (rgd, rgi, rgo) | adds the value of rgi to the value of rgd and writes the result into rgo     | 0x10 |
 | sub (rgd, rgi, rgo) | substracts rgi from rgd and writes the result into rgo                       | 0x11 |
 | mul (rgd, rgi, rgo) | multiplies rgd by rgi and writes the result to rgo                           | 0x12 |

src/bin/lsambler.rs

@@ -1,8 +1,8 @@
 use ledstrip_vm::registers::get_register_code_by_name;
 use ledstrip_vm::tokens::{
     AddToken, ClearToken, CmdToken, CopyToken, DebugToken, DivToken, ExitToken, GotoToken, JeToken,
-    JgToken, JlToken, LabelToken, LoadToken, LshToken, ModToken, MulToken, PauseToken, RshToken,
+    JgToken, JlToken, LabelToken, LoadToken, LshToken, ModToken, MulToken, PauseToken, PrintToken,
-    SendToken, SetToken, SubToken, Token, WriteToken,
+    RshToken, SendToken, SetToken, SubToken, Token, WriteToken,
 };
 use std::fs::{read_to_string, File};
 use std::io;
@@ -85,6 +85,9 @@ fn get_token(line: &str) -> Option<Box<dyn Token>> {
         }),
         "goto" => some_box!(GotoToken),
         "debug" => some_box!(DebugToken),
+        "print" => some_box!(PrintToken {
+            register: get_register_code_by_name(instr_parts.next()?)?
+        }),
         "add" => some_box!(AddToken),
         "sub" => some_box!(SubToken),
         "mul" => some_box!(MulToken),

src/runtime.rs

@@ -5,9 +5,9 @@ use crate::registers::{
 use crate::tokens::{
     AddToken, ClearToken, CmdToken, CopyToken, DebugToken, DivToken, ExitToken, FromBytecode,
     GotoToken, JeToken, JgToken, JlToken, LabelToken, LoadToken, LshToken, ModToken, MulToken,
-    PauseToken, RshToken, SendToken, SetToken, SubToken, Token, WriteToken, T_ADD, T_CLEAR, T_CMD,
+    PauseToken, PrintToken, RshToken, SendToken, SetToken, SubToken, Token, WriteToken, T_ADD,
-    T_COPY, T_DEBUG, T_DIV, T_EXIT, T_GOTO, T_JE, T_JG, T_JL, T_LABEL, T_LOAD, T_LSH, T_MOD, T_MUL,
+    T_CLEAR, T_CMD, T_COPY, T_DEBUG, T_DIV, T_EXIT, T_GOTO, T_JE, T_JG, T_JL, T_LABEL, T_LOAD,
-    T_PAUSE, T_RSH, T_SEND, T_SET, T_SUB, T_WRITE,
+    T_LSH, T_MOD, T_MUL, T_PAUSE, T_PRINT, T_RSH, T_SEND, T_SET, T_SUB, T_WRITE,
 };
 use std::cell::RefCell;
 use std::collections::HashMap;
@@ -100,6 +100,10 @@ impl Runtime {
                 }
                 T_GOTO => text.push(Box::new(GotoToken)),
                 T_DEBUG => text.push(Box::new(DebugToken)),
+                T_PRINT => text.push(Box::new(PrintToken::from_bytecode(&[
+                    instruction,
+                    code_iter.next().unwrap(),
+                ]))),
                 T_ADD => text.push(Box::new(AddToken)),
                 T_SUB => text.push(Box::new(SubToken)),
                 T_MUL => text.push(Box::new(MulToken)),

src/tokens.rs

@@ -15,6 +15,7 @@ pub const T_WRITE: u8 = 0x06;
 pub const T_LABEL: u8 = 0x07;
 pub const T_GOTO: u8 = 0x08;
 pub const T_DEBUG: u8 = 0x09;
+pub const T_PRINT: u8 = 0x0A;
 pub const T_ADD: u8 = 0x10;
 pub const T_SUB: u8 = 0x11;
 pub const T_MUL: u8 = 0x12;
@@ -311,9 +312,36 @@ impl Token for DebugToken {
     }
 }
 
-impl FromBytecode for GotoToken {
+#[derive(Debug, Clone)]
-    fn from_bytecode(_: &[&u8]) -> Self {
+pub struct PrintToken {
-        Self
+    pub register: u8,
+}
+
+impl Token for PrintToken {
+    fn to_bytecode(&self) -> Vec<u8> {
+        vec![T_PRINT, self.register]
+    }
+
+    fn invoke(&self, runtime: &mut Runtime) -> io::Result<()> {
+        let mut value = if let Some(rg) = runtime.get_1byte_register(self.register) {
+            rg.get() as u32
+        } else if let Some(rg) = runtime.get_4byte_register(self.register) {
+            rg.get()
+        } else if self.register == RCS {
+            runtime.rcs.get() as u32
+        } else {
+            0
+        };
+
+        println!("{}", value);
+
+        Ok(())
+    }
+}
+
+impl FromBytecode for PrintToken {
+    fn from_bytecode(code: &[&u8]) -> Self {
+        Self { register: *code[1] }
     }
 }
 
@@ -331,13 +359,6 @@ impl Token for AddToken {
         Ok(())
     }
 }
-
-impl FromBytecode for AddToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct SubToken;
 
@@ -353,12 +374,6 @@ impl Token for SubToken {
     }
 }
 
-impl FromBytecode for SubToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct MulToken;
 
@@ -374,12 +389,6 @@ impl Token for MulToken {
     }
 }
 
-impl FromBytecode for MulToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct DivToken;
 
@@ -395,12 +404,6 @@ impl Token for DivToken {
     }
 }
 
-impl FromBytecode for DivToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct ModToken;
 
@@ -416,12 +419,6 @@ impl Token for ModToken {
     }
 }
 
-impl FromBytecode for ModToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct LshToken;
 
@@ -437,12 +434,6 @@ impl Token for LshToken {
     }
 }
 
-impl FromBytecode for LshToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct RshToken;
 
@@ -458,12 +449,6 @@ impl Token for RshToken {
     }
 }
 
-impl FromBytecode for RshToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct JgToken;
 
@@ -481,12 +466,6 @@ impl Token for JgToken {
     }
 }
 
-impl FromBytecode for JgToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct JlToken;
 
@@ -504,12 +483,6 @@ impl Token for JlToken {
     }
 }
 
-impl FromBytecode for JlToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct JeToken;
 
@@ -527,12 +500,6 @@ impl Token for JeToken {
     }
 }
 
-impl FromBytecode for JeToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct PauseToken;
 
@@ -548,12 +515,6 @@ impl Token for PauseToken {
     }
 }
 
-impl FromBytecode for PauseToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 #[derive(Debug, Clone)]
 pub struct CmdToken;
 
@@ -569,12 +530,6 @@ impl Token for CmdToken {
     }
 }
 
-impl FromBytecode for CmdToken {
-    fn from_bytecode(_: &[&u8]) -> Self {
-        Self
-    }
-}
-
 pub struct SendToken;
 
 impl Token for SendToken {