libm
rustix
libm | rustix | |
---|---|---|
8 | 15 | |
498 | 1,324 | |
1.6% | 2.0% | |
5.5 | 9.3 | |
3 days ago | 2 days ago | |
Rust | Rust | |
Apache License 2.0 | GNU General Public License v3.0 or later |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
libm
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`libm-0.2.6` dependency fails to build for Mac M1
Yes I took a look at build.rs. There's nothing here that stands out to me. Building the project on my Ubuntu machine works btw.
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Rust f64::tan() twice as slow as Go math.Tan()
The more interesting code is the "kernel" tangent function https://github.com/rust-lang/libm/blob/master/src/math/k_tan.rs . I don't see any numerical analysis of accuracy in either the Rust lib or the MUSL source lib, but from one of the comments it looks like it's intended to be within 1ULP, which is what I'd expect.
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Slow performance in Rust compared to Go and C# with math, especially f64::tan()
It's nowhere near complete, but: https://github.com/rust-lang/libm
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Algorithm to compute Trigonometric functions
Inaccurate fast implementations use polynomial approximation. Accurate implementations use high-powered argument reduction and then polynomial approximation. Everything is polynomial approximation.
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Porting Rust's std to rustix
It looks like https://github.com/rust-lang/libm/pull/249 may be a fix for this.
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ELI5: How does calculator know and use pi if even super computers can't know all the digits. Does it use like first 100 digits?
In order to be standards-compliant, computer math libraries need to have a lot more digits of pi than should be strictly necessary. Accurately calculating sine in the upper reaches of double precision floats requires computer to have a table of about 100 digits of pi (or rather pi/2 for technically reasons) and 500 digits of 2/pi - here is an example.
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Cross-platform deterministic physics with Unity DOTS physics and soft floats
So, fixed-point numbers weren't the solution to the problem either. The next thing I came across was the Rapier physics engine. It promises cross-platform determinism all IEEE 754-2008 compliant platforms. Although it's written in Rust, creating C# bindings was fairly easy, and I could use it in Unity after a few hours. But Rapier is still in early stages of development, which means that (at the time of writing this) it lacked many features, like raycasting, which would have been necessary for my project. Also, it's only deterministic on IEEE 754-2008 compliant platforms. But I couldn't really find any information on which processors support it. Even if I did, I still wanted to have deterministic physics on all platforms, not just on "most of them". But I still wondered does how Rapier achieve cross-platform floating point determinism. Supporting only IEEE 754-2008 compliant platforms is one thing, but the mathematical functions I mentioned above (sqrt, trigonometry, etc.) must also be deterministic. I found out that it uses libm, which implements all of these functions in software. It was primarily designed for embedded systems without FPUs, but it turns out it's also pretty useful for making this part of floating point math deterministic. But after all, the basic mathematical operations of floats are still not deterministic. Unless... How about emulating the behavior of floats in software? It should be possible to write a program that works on the byte representation of a float, doing all operations using integer arithmentic... right?
rustix
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OpenBSD 7.5 Released
It would be great for Rust to have a Linux target that doesn't use libc, but from what I've read, not many people are interested in this.
Found this as well: https://github.com/sunfishcode/mustang
Some discussion here: https://github.com/bytecodealliance/rustix/issues/76
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Rust criticism from a Rustacean
Without actually having looked into this, how does https://github.com/bytecodealliance/rustix fit into points 1 & 2?
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Cargo build in debug taking longer than in release?
I find this github issue: https://github.com/bytecodealliance/rustix/issues/575
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Integrating rustix on NuttX
Hi Rust experts, we are willing to integrate rustix on NuttX RTOS, the initial effort was done by rustix author: https://github.com/bytecodealliance/rustix/tree/nuttx but it hit the wall since we don't know the right way to integrate cargo with the old-school NuttX's Makefiles. Any help or suggestion is welcome. More about NuttX here: https://nuttx.apache.org and here: https://nuttx.apache.org/docs/latest/
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Pgwm 0.3 a pure rust `no_std` no libc window manager.
Have you considered using rustix? It provides many of the facilities of std without using libc.
- NVIDIA Security Team: "What if we just stopped using C?" (This is not about Rust)
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Will Rust drop dependency on libc and make direct system calls? when ? (Please don't mention no_std case)
rustix can make syscalls directly to Linux. There's a rustc fork that can use it to build std.
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Can rust be entirely written in rust and drop C usage in its code base ?
The rustix project claims to use raw syscalls (and vDSO calls) on linux and provides more memory / type safety compared to the libc API.
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memmapix: A pure Rust library for cross-platform memory mapped IO, which replace libc with rustix.
Hi, the reason is explained by the description of https://github.com/bytecodealliance/rustix.
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What crates would you add to a "batteries-included" library for Rust?
Please consider rustix as an alternative to nix.
What are some alternatives?
unity-deterministic-physics - Cross-platform deterministic physics simulation in Unity, using DOTS physics and soft floats
liblinux - Linux system calls.
SoftFloat - An implementation of 32 bit floating point arithmetic in C#
relibc - Mirror of https://gitlab.redox-os.org/redox-os/relibc
EntityComponentSystemSamples
clap-rs - A full featured, fast Command Line Argument Parser for Rust
compiler-builtins - Porting `compiler-rt` intrinsics to Rust
soft-float-starter-pack - Software implementation of floating point numbers and operations
libc - Raw bindings to platform APIs for Rust
rust - Empowering everyone to build reliable and efficient software.
mustang - Rust programs written entirely in Rust