ruby.git/ext/bigdecimal/bits.h, branch v3_2_11

[ruby/bigdecimal] Check the function availabilities separately

2021-01-06T00:25:13+00:00

https://github.com/ruby/bigdecimal/commit/cf839a34c8
https://github.com/ruby/bigdecimal/commit/75db4dabb9

[ruby/bigdecimal] Move some definitions to missing.h

2021-01-04T04:29:10+00:00

https://github.com/ruby/bigdecimal/commit/c2b22cc8b3
https://github.com/ruby/bigdecimal/commit/8cbca8481d
https://github.com/ruby/bigdecimal/commit/f05aecf673

Avoid to use __builtin_clzl in SPARC Solaris

2021-01-02T03:06:14+00:00

Add __x86_64__ guard to include x86intrin.h

2021-01-02T01:18:58+00:00

[ruby/bigdecimal] Implement special conversions for 64-bit integers

2021-01-01T15:54:09+00:00

This change improves the conversion speed from small integers.

```
Comparison:
                           big_n9
              master:   4003688.9 i/s
    bigdecimal 3.0.0:   1270551.0 i/s - 3.15x  slower

                          big_n19
              master:   5410096.4 i/s
    bigdecimal 3.0.0:   1000250.3 i/s - 5.41x  slower
```

https://github.com/ruby/bigdecimal/commit/3429bd7e6f