struct_pgm_z80 / Tickets / #2 _switch (a ,);

#2 _switch (a ,); _case(#0) doesn't work

Milestone: 1.0

Status: open

Owner: nobody

Labels: None

Updated: 2024-06-24

Created: 2024-06-24

Creator: Jacques Pelletier

Private: No

A special case of the switch macro doesn't work.

_switch(a,)
_case(#0)

is expanded as
SW_01000:
SW_0100001:
JR NZ, SW_0100002

if the accumulator value was loaded in A, flags won't be set unless we put an OR A to set the flags.
Ex.:

ld a,(some_value)
or a ;set flags
_switch(a,)
_case(#0)

Discussion

Description has changed:

Diff:

--- old
+++ new
@@ -4,9 +4,9 @@
   _case(#0)

 is expanded as
-      000025                         23 SW_01000:
-      000025                         24 SW_0100001:
-      000025 20 4F            [12]   25    JR  NZ, SW_0100002
+SW_01000:
+SW_0100001:
+      JR   NZ, SW_0100002

 if the accumulator value was loaded in A, flags won&#39;t be set unless we put an OR A to set the flags.
 Ex.:

_switch (a ,); _case(#0) doesn't work

Use structured programming with Z80 assembler

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#2 _switch (a ,); _case(#0) doesn't work

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