Richard Sandiford <richard.sandif...@arm.com> writes:
> Karl Meakin <karl.mea...@arm.com> writes:
>> +// If the branch destination is out of range (1KiB), we have to generate an
>> +// extra B instruction (which can handle larger displacements) and branch
>> around
>> +// it
>> +int far_branch(i32 x, i32 y) {
>> + volatile int z = 0;
>> + if (x == y) {
>
> It might be worth making this:
>
> if (__builtin_expect (x == y, 0)) {
Gah, I meant:
if (__builtin_expect (x == y, 1)) {
sorry! The branch should be assumed untaken, and so the condition
should be assumed true.
> as a way of ensuring that nothing tries to "optimise" the code by
> inverting the branch (and avoiding the far branch).
