give immediates a sign & fix stuff

2026-06-12 17:08:42 -04:00
parent e199620856
commit 7280f7b071
7 changed files with 282 additions and 150 deletions
@@ -47,13 +47,21 @@ impl Node for Code {
    }
 }

-pub fn parse_imm(mut s: &str, span: Span) -> Result<u64, CompilerMsg> {
+pub fn parse_imm(mut s: &str, span: Span) -> Result<Imm, CompilerMsg> {
    let mut radix = 10;
+    let mut mult = 1;
+    if s.starts_with('-') {
+        mult = -1;
+        s = &s[1..];
+    }
    if s.starts_with("0x") {
        radix = 16;
        s = &s[2..];
    }
-    u64::from_str_radix(s, radix).map_err(|_| CompilerMsg::from(("invalid immediate", span)))
+    let abs = u64::from_str_radix(s, radix)
+        .map_err(|_| CompilerMsg::from(("invalid immediate", span)))?;
+    let val = (abs as i128) * mult;
+    Ok(Imm(val))
 }

 pub fn parse_rmi(ctx: &mut crate::parser::ParseCtx) -> Result<RegImmMem, CompilerMsg> {