mirror of
https://github.com/gbdev/rgbds.git
synced 2025-11-20 10:12:06 +00:00
66 lines
1.7 KiB
NASM
66 lines
1.7 KiB
NASM
SECTION "floating", ROM0
|
|
|
|
Known: ; This symbol is known to be a label, but its value is not known yet
|
|
ds 4
|
|
Known2: ; This symbol isn't known either, but the difference is known (4)
|
|
|
|
SECTION "fixed", ROM0[42]
|
|
|
|
Constant: ; This label's value is known to be 42
|
|
|
|
SECTION "fixed 2", ROM0[69]
|
|
|
|
Constant2: ; Same as above
|
|
|
|
ENDSECTION ; Ensure we are in neither section
|
|
|
|
|
|
MACRO print_diff
|
|
PRINTLN (\1) - (\2)
|
|
PRINTLN (\2) - (\1)
|
|
ENDM
|
|
|
|
; Diffing two constants should work
|
|
print_diff Constant, Constant2
|
|
; Diffing two labels in the same SECTION as well
|
|
print_diff Known2, Known
|
|
; Diffing a constant and a "floating" label cannot work
|
|
print_diff Constant, Known
|
|
; Diffing a constant and a ref cannot work
|
|
print_diff Constant, Unknown
|
|
; Diffing a floating label and a ref cannot work
|
|
print_diff Known, Unknown
|
|
; Diffing two refs cannot work
|
|
print_diff Unknown, Unknown2
|
|
|
|
; Now let's fiddle with PC
|
|
SECTION "fixed PC", ROM0[420]
|
|
; Diffing a constant and PC should work
|
|
print_diff Constant, @
|
|
; Diffing a floating label and PC cannot work
|
|
print_diff Known, @
|
|
; Diffinf a ref and PC cannot work
|
|
print_diff Unknown, @
|
|
; Diffing PC and PC should work
|
|
print_diff @, @
|
|
; Diffing PC and a label from here should work
|
|
LocalFixed:
|
|
print_diff LocalFixed, @
|
|
ds 69
|
|
print_diff LocalFixed, @
|
|
|
|
SECTION "Floating PC", ROM0
|
|
; Diffing a constant and PC cannot work
|
|
print_diff Constant, @
|
|
; Diffing a floating label and PC cannot work
|
|
print_diff Known, @
|
|
; Diffinf a ref and PC cannot work
|
|
print_diff Unknown, @
|
|
; Diffing PC and PC should work
|
|
print_diff @, @
|
|
; Diffing PC and a label from here should work
|
|
LocalFloating:
|
|
print_diff LocalFloating, @
|
|
ds 42
|
|
print_diff LocalFloating, @
|