Rollup merge of #138275 - folkertdev:expose-is-s390x-feature-detected, r=Mark-Simulacrum

expose `is_s390x_feature_detected!` from `std::arch`

tracking issue: #135413
implementation: rust-lang/stdarch#1699 (more features added in rust-lang/stdarch#1720)

This macro was part of the recent `stdarch` synchronization, but not yet exposed via `std::arch`.

r? libs

Author: jieyouxu

library/std/src/lib.rs

@@ -666,6 +666,8 @@ pub mod arch {
     pub use std_detect::is_loongarch_feature_detected;
     #[unstable(feature = "is_riscv_feature_detected", issue = "111192")]
     pub use std_detect::is_riscv_feature_detected;
+    #[unstable(feature = "stdarch_s390x_feature_detection", issue = "135413")]
+    pub use std_detect::is_s390x_feature_detected;
     #[stable(feature = "simd_x86", since = "1.27.0")]
     pub use std_detect::is_x86_feature_detected;
     #[unstable(feature = "stdarch_mips_feature_detection", issue = "111188")]

library/std/tests/run-time-detect.rs

@@ -8,6 +8,10 @@
     all(target_arch = "aarch64", any(target_os = "linux", target_os = "android")),
     feature(stdarch_aarch64_feature_detection)
 )]
+#![cfg_attr(
+    all(target_arch = "s390x", target_os = "linux"),
+    feature(stdarch_s390x_feature_detection)
+)]
 #![cfg_attr(
     all(target_arch = "powerpc", target_os = "linux"),
     feature(stdarch_powerpc_feature_detection)
@@ -132,6 +136,32 @@ fn powerpc64_linux() {
     // tidy-alphabetical-end
 }
 
+#[test]
+#[cfg(all(target_arch = "s390x", target_os = "linux"))]
+fn s390x_linux() {
+    use std::arch::is_s390x_feature_detected;
+    // tidy-alphabetical-start
+    println!("deflate-conversion: {}", is_s390x_feature_detected!("deflate-conversion"));
+    println!("enhanced-sort: {}", is_s390x_feature_detected!("enhanced-sort"));
+    println!("guarded-storage: {}", is_s390x_feature_detected!("guarded-storage"));
+    println!("high-word: {}", is_s390x_feature_detected!("high-word"));
+    println!("nnp-assist: {}", is_s390x_feature_detected!("nnp-assist"));
+    println!("transactional-execution: {}", is_s390x_feature_detected!("transactional-execution"));
+    println!("vector-enhancements-1: {}", is_s390x_feature_detected!("vector-enhancements-1"));
+    println!("vector-enhancements-2: {}", is_s390x_feature_detected!("vector-enhancements-2"));
+    println!(
+        "vector-packed-decimal-enhancement-2: {}",
+        is_s390x_feature_detected!("vector-packed-decimal-enhancement-2")
+    );
+    println!(
+        "vector-packed-decimal-enhancement: {}",
+        is_s390x_feature_detected!("vector-packed-decimal-enhancement")
+    );
+    println!("vector-packed-decimal: {}", is_s390x_feature_detected!("vector-packed-decimal"));
+    println!("vector: {}", is_s390x_feature_detected!("vector"));
+    // tidy-alphabetical-end
+}
+
 #[test]
 #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
 fn x86_all() {