According to the ARM C Language Extensions the 64x1 types should all be passed
in the SIMD registers rather than GPRs, and should not be assignment-compatible
with [u]int64_t / float64_t (as they are at present). These two patches (first
for float64x1_t, second for [u]int64x1_t) make these types into vector types as
per GNU vector extensions.
In the int64x1 patch I also fix the type signatures of the many scalar
(d_s64/d_u64) intrinsics, which had previously used int64x1_t in place of
int64_t (the two previously having been indistinguishable).
I expect these to backport to 4.9 straightforwardly...
Ok for trunk?
--Alan
