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

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This commit is contained in:
Rangi
2026-09-07 19:28:45 +02:00
committed by Eldred Habert
parent db9509fba0
commit fdd6cece30
5 changed files with 70 additions and 3 deletions
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test/asm/sp-signed-truncation.asm
+22
View File
@@ -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
test/asm/sp-signed-truncation.err
+16
View File
@@ -0,0 +1,16 @@
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(15)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(16)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(17)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(18)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(19)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(20)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(21)
warning: Expression must be signed 8-bit [-Wtruncation]
at sp-signed-truncation.asm(22)