zstd-rs

10,656 Commits 17 Branches 77 Tags

2 Commits

Author	SHA1	Message	Date
Ilya Tokar	7c3d1cb3ab	Enable STATIC_BMI2 for gcc/clang Some usage (e.g. BIT_getLowerBit) uses it without checking for MSVC, so enabling for clang gives a small performance boost.	2022-03-03 15:03:54 -05:00
Ilya Tokar	0178c12dd9	Use helper function for bit manipulations. We already have BIT_getLowerBits, so use it. Benefits are 2fold: 1) Somewhat cleaner code 2) We are now using bzhi instructions, when available. Performance delta is too small for microbenchmarks, but avoiding load still helps larger applications, by reducing data cache pressure.	2022-02-23 17:59:56 -05:00

Author

SHA1

Message

Date

Ilya Tokar

7c3d1cb3ab

Enable STATIC_BMI2 for gcc/clang

Some usage (e.g. BIT_getLowerBit) uses it without checking for MSVC,
so enabling for clang gives a small performance boost.

2022-03-03 15:03:54 -05:00

Ilya Tokar

0178c12dd9

Use helper function for bit manipulations.

We already have BIT_getLowerBits, so use it. Benefits are 2fold:
1) Somewhat cleaner code
2) We are now using bzhi instructions, when available. Performance
delta is too small for microbenchmarks, but avoiding load still helps
larger applications, by reducing data cache pressure.

2022-02-23 17:59:56 -05:00