[boost] numeric_cast

[Gero Peterhoff via Boost]

Hallo,
can you improve numeric_cast
1) constexpr
2) vectorisable
The problem is that the compilers on x86 without hardware support (AVX512DQ) do not vectorize the conversions u/int64_t -> float64/32_t. This may also apply to other architectures. But that can be solved manually. My patch requires C++20 (std::bit_cast), but you can probably work around that. Modifications:
- add #include <boost/predef.h>
- improve raw_converter

For a better understanding see https://godbolt.org/z/j58rW411s

regards
Gero

[Gavin Lambert via Boost]

On 13/08/2022 12:48, Gero Peterhoff wrote:
> can you improve numeric_cast

If you want to submit a patch, that's best done by making a PR on
github. You don't need to post about it here unless it's been sitting
for a long time without any attention.

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