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Rollup merge of #145099 - heiher:loong-32s, r=folkertdev

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rustc_target: Add the `32s` target feature for LoongArch

LLVM: https://github.com/llvm/llvm-project/pull/139695
This commit is contained in:
许杰友 Jieyou Xu (Joe)
2025-08-19 19:42:08 +08:00
committed by GitHub
parent b4a88c8d07 0246245420
commit bdd3bc82c8
6 changed files with 14 additions and 7 deletions
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3
library/std_detect/src/detect/arch/loongarch.rs
View File

@@ -8,6 +8,7 @@ features! {
/// Checks if `loongarch` feature is enabled.
/// Supported arguments are:
///
/// * `"32s"`
/// * `"f"`
/// * `"d"`
/// * `"frecipe"`
@@ -22,6 +23,8 @@ features! {
/// * `"lvz"`
/// * `"ual"`
#[stable(feature = "stdarch_loongarch_feature", since = "1.89.0")]
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] _32s: "32s";
/// 32S
@FEATURE: #[stable(feature = "stdarch_loongarch_feature", since = "1.89.0")] f: "f";
/// F
@FEATURE: #[stable(feature = "stdarch_loongarch_feature", since = "1.89.0")] d: "d";

13
library/std_detect/src/detect/os/linux/loongarch.rs
View File

@@ -17,22 +17,21 @@ pub(crate) fn detect_features() -> cache::Initializer {
// The values are part of the platform-specific [cpucfg]
//
// [cpucfg]: LoongArch Reference Manual Volume 1: Basic Architecture v1.1
let cpucfg1: usize;
let cpucfg2: usize;
unsafe {
asm!(
"cpucfg {}, {}",
out(reg) cpucfg2, in(reg) 2,
options(pure, nomem, preserves_flags, nostack)
);
}
let cpucfg3: usize;
unsafe {
asm!(
"cpucfg {}, {}",
"cpucfg {}, {}",
"cpucfg {}, {}",
out(reg) cpucfg1, in(reg) 1,
out(reg) cpucfg2, in(reg) 2,
out(reg) cpucfg3, in(reg) 3,
options(pure, nomem, preserves_flags, nostack)
);
}
enable_feature(&mut value, Feature::_32s, bit::test(cpucfg1, 0) || bit::test(cpucfg1, 1));
enable_feature(&mut value, Feature::frecipe, bit::test(cpucfg2, 25));
enable_feature(&mut value, Feature::div32, bit::test(cpucfg2, 26));
enable_feature(&mut value, Feature::lam_bh, bit::test(cpucfg2, 27));