GPU code can now use Rust's standard library. We share the implementation approach and what this unlocks for GPU programming.

This works because of our custom hostcall framework. A hostcall is analogous to a syscall. A hostcall is a structured request from GPU code to the host CPU to perform something it cannot execute itself. You can think of it like a remote procedure call from the GPU to the host to achieve syscall-like functionality.

To end users, Rust's std APIs appear unchanged and act as one would expect.

xxx: ssh over mattermost =)
yyy: Лучшие практики =)

I’m all for learning C if it will be useful for the job at hand, but you can write lots of great software without knowing C. [выделение моё]

A few people repeated the idea that C teaches you how code “really” executes. But C is an abstract model of a computer, and modern CPUs do all kinds of things that C doesn’t show you or explain. Pipelining, cache misses, branch prediction, speculative execution, multiple cores, even virtual memory are all completely invisible to C programs.

C is an abstraction of how a computer works, and chip makers work hard to implement that abstraction, but they do it on top of much more complicated machinery.

impl<T> Hash for UnconditionallyEqual<T> {
    fn hash<H: Hasher>(&self, _state: &mut H) {}
}

const hello_world_in_c =
    \\#include <stdio.h>
    \\
    \\int main(int argc, char **argv) {
    \\    printf("hello world\n");
    \\    return 0;
    \\}
;

    let hello_world_in_c = "\
    #include <stdio.h>\
    \n\
    \nint main(int argc, char **argv) {\
    \n    printf(\"hello world\\n\");\
    \n    return 0;\
    \n}";

    let hello_world_in_c = r#"#include <stdio.h>

int main(int argc, char **argv) {
    printf("hello world\n");
    return 0;
}"#;

macro_rules! text {
    (#[doc=$first_line:literal] $(#[doc=$lines:literal])*) => {
        concat!($first_line, $("\n", $lines),*)
    };
}
let hello_world_in_c = text! {
    ///#include <stdio.h>
    ///
    ///int main(int argc, char **argv) {
    ///    printf("hello world\n");
    ///    return 0;
    ///}
};

---
time: 20:03:20
player: Sammy Sosa
action: strike (miss)
...
---
time: 20:03:47
player: Sammy Sosa
action: grand slam
...