Implement the .res control statement

Similarly to other assemblers, this allows the programmer to write a
definite amount of bytes with the same values.

Compared to other assemblers there are two things to notice. First,
there is a limit to it (i.e. whatever can fit in 2 bytes). Second, if
the fill value is not provided, then it will default to the current
mapping's fill value, or just 0x00 if the current mapping doesn't define
one of its own.

Signed-off-by: Miquel Sabaté Solà <mikisabate@gmail.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/xixanta/src/opcodes.rs b/lib/xixanta/src/opcodes.rs
index 593d279..455a8ea 100644
--- a/lib/xixanta/src/opcodes.rs
+++ b/lib/xixanta/src/opcodes.rs
@@ -749,6 +749,7 @@ lazy_static! {
         functions.insert(String::from(".repeat"), Control { control_type: ControlType::StartRepeat, has_identifier: Some(true), required_args: Some((1, 2)), touches_context: true });
         functions.insert(String::from(".endrepeat"), Control { control_type: ControlType::EndRepeat, has_identifier: None, required_args: None, touches_context: true });
         functions.insert(String::from(".include"), Control { control_type: ControlType::IncludeSource, has_identifier: None, required_args: Some((1, 1)), touches_context: false });
+        functions.insert(String::from(".res"), Control { control_type: ControlType::ReserveMemory, has_identifier: None, required_args: Some((1, 2)), touches_context: false });
 
         functions
     };