To invoke this instruction from the source level, a compiler builtin
is provided.
Since C syntax doesn't provide functions with two results, this builtin refers
to them via pointers:__super_ld32( int* x, int *y, int *a)
I did something similar in a private port by folding the builtin to
long long tmp = __super_ld32_dimode (a);
*x = (int) tmp;
*y = (int) (tmp >> 32);
Then you create the builtin as returning a DImode, but the lower-subreg
pass will be able to split the DImode pseudo into non-consecutive hard
registers.
Paolo
