[drop later] fix for "immediate value too large"

Author: XrXr

zjit/src/backend/x86_64/mod.rs

@@ -392,7 +392,7 @@ impl Assembler
                         mov(cb, Assembler::SCRATCH0, opnd.into());
                         Assembler::SCRATCH0
                     } else {
-                        opnd.into()
+                        imm_opnd(*value as i64)
                     }
                 },
                 _ => opnd.into()