test x86 crc intrinsics

Author: folkertdev

example/std_example.rs

@@ -122,6 +122,9 @@ fn main() {
     #[cfg(target_arch = "x86_64")]
     unsafe {
         test_simd();
+
+        #[cfg(not(jit))]
+        test_crc32();
     }
 
     Box::pin(
@@ -210,6 +213,21 @@ struct I64X2(i64, i64);
 #[allow(improper_ctypes_definitions)]
 extern "C" fn foo(_a: I64X2) {}
 
+#[cfg(target_arch = "x86_64")]
+#[target_feature(enable = "sse4.2")]
+#[cfg(not(jit))]
+unsafe fn test_crc32() {
+    assert!(is_x86_feature_detected!("sse4.2"));
+
+    let a = 42u32;
+    let b = 0xdeadbeefu64;
+
+    assert_eq!(_mm_crc32_u8(a, b as u8), 4135334616);
+    assert_eq!(_mm_crc32_u16(a, b as u16), 1200687288);
+    assert_eq!(_mm_crc32_u32(a, b as u32), 2543798776);
+    assert_eq!(_mm_crc32_u64(a as u64, b as u64), 241952147);
+}
+
 #[cfg(target_arch = "x86_64")]
 #[target_feature(enable = "sse2")]
 unsafe fn test_simd() {