Hello,
It could be useful in bit packed structure, but that implies the absence
of any padding bits...
I cant think of a use case outside of structures.
BTW, Cant you achieve arbitrary size integers with a bitfield structure?
https://stackoverflow.com/questions/3917425/how-to-implement-unsigned-33-bit-integer-type
|struct uint33_t { uint64_t value : 33; }; |
Admittedly I believe your solution would make the syntax a bit less
cumbersome.
Sebastien
Le 12/10/2020 à 17:25, Philipp Klaus Krause a écrit :
I wonder how useful arbitrary-width integers would be for SDCC users.
_ExtInt(N) would be an N-bit integer type.
E.e. one could have an unsigned 24-bit integer (in 3 bytes) via
unsigned _ExtInt(24) i;
or a 23-bit type (3 bytes in memory, 23 value bits and 1 padding bit):
unsigned _ExtInt(23) i;
If such a type is introduced, would you prefer this type to exempt from
integer promotion?
Philipp
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