fix compile error on arm32 (missing float64x1_t type)

[troyliu0105]

this small commit fixes compiling error on some arm32 devices. cuz lack of float64x1_t definition. ( float64x1_t is only available on aarch64 document).

[build] In file included from /workspaces/demo/builds/release/_deps/highway-src/hwy/highway.h:588:0,
[build]                  from /workspaces/demo/builds/release/_deps/highway-src/hwy/timer-inl.h:26,
[build]                  from /workspaces/demo/builds/release/_deps/highway-src/hwy/nanobenchmark.cc:28:
[build] /workspaces/demo/builds/release/_deps/highway-src/hwy/ops/arm_neon-inl.h:2494:12: error: ‘float64x1_t’ does not name a type
[build]  HWY_INLINE float64x1_t vrecpe_f64(float64x1_t raw) {
[build]             ^~~~~~~~~~~
[build] ninja: build stopped: subcommand failed.

so the additional HWY_HAVE_FLOAT64 is added to determine whether the vrecpe_f64 func should be defined.

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[johnplatts]

Why hasn't this pull request been already merged?

[jan-wassenberg]

Checking, thanks for following up..

[jan-wassenberg]

Compile logs have already been deleted but it looks like a build timeout is at least contributing to failing internal CI and preventing the merge. Retrying..

[jan-wassenberg]

Yes, looks like it was a build timeout.