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std_detect: Add target features for LoongArch v1.1

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WANG Rui
2025-03-18 13:54:15 +08:00
committed by Amanieu d'Antras
parent c0fc23f2d8
commit ad03413c39
2 changed files with 28 additions and 0 deletions
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15
library/stdarch/crates/std_detect/src/detect/arch/loongarch.rs
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@@ -11,8 +11,13 @@ features! {
/// * `"f"`
/// * `"d"`
/// * `"frecipe"`
/// * `"div32"`
/// * `"lsx"`
/// * `"lasx"`
/// * `"lam-bh"`
/// * `"lamcas"`
/// * `"ld-seq-sa"`
/// * `"scq"`
/// * `"lbt"`
/// * `"lvz"`
/// * `"ual"`
@@ -23,10 +28,20 @@ features! {
/// D
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] frecipe: "frecipe";
/// Frecipe
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] div32: "div32";
/// Div32
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] lsx: "lsx";
/// LSX
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] lasx: "lasx";
/// LASX
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] lam_bh: "lam-bh";
/// LAM-BH
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] lamcas: "lamcas";
/// LAM-CAS
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] ld_seq_sa: "ld-seq-sa";
/// LD-SEQ-SA
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] scq: "scq";
/// SCQ
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] lbt: "lbt";
/// LBT
@FEATURE: #[unstable(feature = "stdarch_loongarch_feature_detection", issue = "117425")] lvz: "lvz";

13
library/stdarch/crates/std_detect/src/detect/os/linux/loongarch.rs
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@@ -24,7 +24,20 @@ pub(crate) fn detect_features() -> cache::Initializer {
options(pure, nomem, preserves_flags, nostack)
);
}
let cpucfg3: usize;
unsafe {
asm!(
"cpucfg {}, {}",
out(reg) cpucfg3, in(reg) 3,
options(pure, nomem, preserves_flags, nostack)
);
}
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));
enable_feature(&mut value, Feature::lamcas, bit::test(cpucfg2, 28));
enable_feature(&mut value, Feature::scq, bit::test(cpucfg2, 30));
enable_feature(&mut value, Feature::ld_seq_sa, bit::test(cpucfg3, 23));
// The values are part of the platform-specific [asm/hwcap.h][hwcap]
//