[OpenBIOS] Some thoughts on paflof.
parag at codegen.com
Wed Jun 12 14:11:04 CEST 2002
>a) C doesn't allow to cast pointers to integers v.v. etc. without
> going through a union;
That's not true unless you don't want to use type-casts.
foo = (char*)bar;
bar = (uint)foo;
Gcc will warn if the sizes of "int" warn "char*" are not the same, which
is easy to workaround with an additional typecast.
char *foo; /* assume 32-bit pointer */
foo = (char*)(uint)bar;
bar = (uint64)(uint)foo;
>b) performance is king ;)
First make it run, then make it fast. It's a rare problem that requires
the wrong results as fast as possible. :)
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