Compile `PLATFORM_INTRINSIC` ABI extern functions

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Assessment

Difficulty
4/5
Estimated time
3-5 days
Newbie friendliness
45/100
Issue type
Feature
Clarity
Mostly clear
Activity status
Active
Tech stack
cpp, rust
Domain
compilers

Research direction

Start by reading issue 4791, then trace how gccrs handles extern ABI declarations and the listed platform-intrinsic functions. The work is done when the shown simd_eq, simd_ne, simd_lt, simd_le, simd_gt, and simd_ge declarations compile successfully.

Written by the indexing model from the issue text.

Description

codegen core

Continuation of https://github.com/Rust-GCC/gccrs/issues/4791, we do not support compilation of platform intrinsic built-ins yet, e.g:

 extern "platform-intrinsic" {
	    //pub fn simd_select_bitmask
    pub fn simd_eq<T, U>(x: T, y: T) -> U;
    pub fn simd_ne<T, U>(x: T, y: T) -> U;
    pub fn simd_lt<T, U>(x: T, y: T) -> U;
    pub fn simd_le<T, U>(x: T, y: T) -> U;
    pub fn simd_gt<T, U>(x: T, y: T) -> U;
    pub fn simd_ge<T, U>(x: T, y: T) -> U;
}
Dominant language
C++
Stars
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Forks
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Avg merge
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Merged PRs (30d)
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