spcasm: add warning for too high address in full-range bit addressing…

… instructions

src/assembler/memory.rs

@@ -150,9 +150,16 @@ impl MemoryValue {
 				},
 				resolved => Self::NumberRelative(resolved),
 			},
-			Self::NumberHighByteWithContainedBitIndex(number, bit_index) => match number.try_resolve() {
+			Self::NumberHighByteWithContainedBitIndex(ref number, bit_index) => match number.clone().try_resolve() {
 				AssemblyTimeValue::Literal(reference_memory_address, ..) => {
-					// TODO: perform byte size check
+					if reference_memory_address > 0x1FFF {
+						frontend.report_diagnostic(AssemblyError::ValueTooLarge {
+							value:    reference_memory_address,
+							size:     13,
+							location: number.source_span(),
+							src:      source_code.clone(),
+						});
+					}
 					let resolved_data = ((reference_memory_address & 0x1F00) >> 8) as u8 | (bit_index << 5);
 					Self::Resolved(resolved_data)
 				},

tests/bit-index-overflow.s

@@ -0,0 +1,2 @@
+org 0
+and1 C,$fe2b.0

tests/cli/bit-index.trycmd

@@ -0,0 +1,16 @@
+```trycmd
+$ spcasm tests/bit-index-overflow.s
+spcasm::value_too_large
+
+  ⚠ The value `FE2B` is being used as a 13-bit operand here, but it is larger
+  │ than this. The extra upper bits are truncated.
+   ╭─[tests/bit-index-overflow.s:2:8]
+ 1 │ org 0
+ 2 │ and1 C,$fe2b.0
+   ·        ──┬──
+   ·          ╰── 13-bit operand
+   ╰────
+  help: If this was intentional, explicitly truncate the value.
+
+
+```