Warn about signed 8-bit truncation for add sp, e8 and ld hl, sp + e8

2026-09-19 04:07:05 +00:00 · 2026-09-07 19:28:45 +02:00
parent db9509fba0
commit fdd6cece30
5 changed files with 70 additions and 3 deletions
@@ -0,0 +1,22 @@
+section "test", rom0
+
+opt Wtruncation=1
+
+; good
+ld hl, sp + 0
+ld hl, sp + 127
+ld hl, sp - 128
+ld hl, sp + -128
+add sp, 0
+add sp, 127
+add sp, -128
+
+; bad
+ld hl, sp + 128
+ld hl, sp - 129
+ld hl, sp + 255
+ld hl, sp - 256
+add sp, 128
+add sp, -129
+add sp, 255
+add sp, -256