Philipp Klaus Krause schreef op 2022-07-14 21:34:
Am 14.07.22 um 14:46 schrieb Maarten Brock:
Hi Philipp,
Philipp Klaus Krause schreef op 2022-07-14 12:58:
SDCC currently supports two forms of inline assembler:
1:
__asm
asm code here
__endasm;
and
2:
__asm("asm code here");
Does (or will) this second form also support multiple asm
instructions? AFAIK it doesn't.
void f(void)
{
__asm__("nop\nnop");
}
and
void f(void)
{
__asm__("nop\n"
"nop");
}
both work.
Personally I do not like having to add \n to every line.
Since people like form 1, I'd now think we should keep it, but drop
#pragma sdcc_hash. That looks like a better way forward and also
solves the issues.
When this pragma is dropped does that mean it is no longer possible to
use the # for an immediate operand?
Or will it be limited to use outside of a macro? I wouldn't even know
how to escape the #.
Benedikt Freisen schreef op 2022-07-14 18:46:
Another option would be to rely on a mechanism similar to C++11-style
raw string literals (i.e. R""), because they may contain newlines.
This could be a very nice solution to this problem, I guess. With that I
think it would be possible to do almost everything we can currently do
in __asm __endasm with __asm__(""), though I suspect that using macros
will still be cumbersome.
Maarten
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