Sławomir Kawa schreef op 2020-06-16 00:45:
pon., 15 cze 2020 o 11:05 Maarten Brock <sourceforge.br...@dse.nl>
napisał(a):
This sounds like an excellent job for the peephole optimizer.
Are there restrictions on the operand that should be checked?
Maarten
I have created following peephole rule for my if statement:
replace {
mov a, __pa
and a, #0x10
cneqsn a, #0x00
goto %1
} by {
; peephole PA4 check optimization.
t1sn __pa, #4
goto %1
}
I didn't use a pattern variable as __pa because i want to have more
control, at least for now. The problem for me is that in C bit position
is
specified as bitmash ( byte & 0x10) while tXsn takes bit number (#4)
and I
don't know how to create a rule that converts bit number as bitmask to
bit
number. I could create 8 rules foreach tXsn with different bit numbers
:/
I would just create 8 rules for now.
Maarten
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