Hi,

following code doesn't work. also local and @@ dosen't work

macro crc16r_decode {
mov dh,dl
shr dl,1
xor dh,al
test dh,1
jz .no_xor
xor eax, 18005h
.no_xor:
shr eax,1
}

foo:
repeat 8
crc16r_decode
end repeat

see also: http://board.flatassembler.net/topic.php?t=1106

with best regards
peter[/url]

You cannot define the same label more than once, and it happens when you put it inside the "repeat" block, because it is processed at assembly time.

The only symbols that can be redefined at assembly time are the numeric constants (but you cannot forward-reference when you redefine them at least once).

Here's the quick and dirty solution with numerical constant as a redefinable moving pointer for base of repeated code (we can't just use constant to keep the pointer to "no_xor", because it cannot be forward-referenced):

Doesn't local directive imply that given label is local for this macro?

Yes, but this macro is processed only once, at it occurs only once in source. The "repeat" directive is processed at assembly time, when macro is already replaced with the preprocessed instructions, so the "base" is the same symbol in the each repetition, as it is just the same line of preprocessed source.

Hi, Privalov.
What if there is some preprocessor directive for "phisical" repeading macroses? I know this will enlarge the memory requirements, but if the count is reasonably small, (and it is, in most of the cases) it may solve a lot of problems like above.

Regards.