I have a question about the Aarch64 simd instructions and builtins.
I want to unpack a __Float32x4 (V4SF) variable into two __Float64x2
variables. I can get the upper part with:
__Float64x2_t a = __builtin_aarch64_vec_unpacks_hi_v4sf (x);
But I can't seem to find a builtin that would get me the
On Fri, Jun 08, 2018 at 04:01:14PM -0500, Steve Ellcey wrote:
> I have a question about the Aarch64 simd instructions and builtins.
>
> I want to unpack a __Float32x4 (V4SF) variable into two __Float64x2
> variables. I can get the upper part with:
>
> __Float64x2_t a = __builtin_aarch64_vec_unpa
On Fri, 2018-06-08 at 22:34 +0100, James Greenhalgh wrote:
>
> Are you in an environment where you can use arm_neon.h ? If so, that
> would
> be the best approach:
>
> float32x4_t in;
> float64x2_t low = vcvt_f64_f32 (vget_low_f64 (in));
> float64x2_t high = vcvt_high_f64_f32 (in);
>
> If
