Hi,
I'm retrofitting a compiler that outputs text assembler to instead use
DynASM, and it does:
printf(" xchg [rdi], %s\n", reg_ax(sz));
where reg_ax() is
static char* reg_ax(int sz) {
switch (sz) {
case 1: return "al";
case 2: return "ax";
case 4: return "eax";
case 8: return "rax";
}
}
The manual way of rewriting as DynASM, something like:
switch (sz) {
case 1:
| xchg [rdi], al
break;
case 2:
| xchg [rdi], ax
break;
case 4:
| xchg [rdi], eax
break;
case 8:
| xchg [rdi], rax
break;
}
is sort of fine, but a bit cumbersome when used various times with
different instructions.
Is there something like Rb, Rq, etc, to select the 0th register by size?
Or is it possible to write a macro to do so? (I tried for a bit but didn't
have much luck.)
Or some better way of structuring the code?
Thank you,
Scott
