https://github.com/rust-lang/rust http://git.dreamy.place/mirrors/rust/atom?h=auto 2025-05-03T18:17:49+00:00 2025-05-03T18:17:49+00:00 Trevor Gross tmgross@umich.edu 2025-04-29T22:16:41+00:00 urn:sha1:8995ac0448312c94f85ffe3ec92e44b85834aead Get performance closer to the glibc implementations by adding assembly fma routines, with runtime feature detection so they are used even if not compiled with `+fma` (as the distributed standard library is often not). Glibc uses ifuncs, this implementation stores a function pointer in an atomic. Results of CPU flags are also cached in order to avoid repeating the startup time in calls to different functions. The feature detection code is a slightly simplified version of `std-detect`. Musl sources were used as a reference [1]. Fixes: https://github.com/rust-lang/rust/issues/140452 once synced [1]: https://github.com/bminor/musl/blob/c47ad25ea3b484e10326f933e927c0bc8cded3da/src/math/x32/fma.c 2025-05-03T18:17:49+00:00 Trevor Gross tmgross@umich.edu 2025-05-01T17:49:56+00:00 urn:sha1:4a1dc96652ea5cbd7e0273df19c828324699f4db This module is used for both i686 and x86-64. 2025-04-29T23:09:50+00:00 Trevor Gross tmgross@umich.edu 2025-04-29T20:52:54+00:00 urn:sha1:caf337d46742aca1705c3254e8d45d7238a8435c Move implementations to `generic/` like the other functions. This also allows us to combine the `fma` and `fma_wide` modules. 2025-04-19T21:20:24+00:00 Trevor Gross tmgross@umich.edu 2025-04-19T20:58:25+00:00 urn:sha1:911a70381a9e7c84400b156e3cbcd805f3e64034 Distribute everything from `libm/` to better locations in the repo. `libm/libm/*` has not moved yet to avoid Git seeing the move as an edit to `Cargo.toml`. Files that remain to be merged somehow are in `etc/libm`.