Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/library/stdarch/crates/core_arch/src/aarch64/crc.rs b/library/stdarch/crates/core_arch/src/aarch64/crc.rs
new file mode 100644
index 000000000..6e8128534
--- /dev/null
+++ b/library/stdarch/crates/core_arch/src/aarch64/crc.rs
@@ -0,0 +1,45 @@
+extern "unadjusted" {
+    #[link_name = "llvm.aarch64.crc32x"]
+    fn crc32x_(crc: u32, data: u64) -> u32;
+
+    #[link_name = "llvm.aarch64.crc32cx"]
+    fn crc32cx_(crc: u32, data: u64) -> u32;
+}
+
+#[cfg(test)]
+use stdarch_test::assert_instr;
+
+/// CRC32 single round checksum for quad words (64 bits).
+#[inline]
+#[target_feature(enable = "crc")]
+#[cfg_attr(test, assert_instr(crc32x))]
+pub unsafe fn __crc32d(crc: u32, data: u64) -> u32 {
+    crc32x_(crc, data)
+}
+
+/// CRC32-C single round checksum for quad words (64 bits).
+#[inline]
+#[target_feature(enable = "crc")]
+#[cfg_attr(test, assert_instr(crc32cx))]
+pub unsafe fn __crc32cd(crc: u32, data: u64) -> u32 {
+    crc32cx_(crc, data)
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::core_arch::{aarch64::*, simd::*};
+    use std::mem;
+    use stdarch_test::simd_test;
+
+    #[simd_test(enable = "crc")]
+    unsafe fn test_crc32d() {
+        assert_eq!(__crc32d(0, 0), 0);
+        assert_eq!(__crc32d(0, 18446744073709551615), 1147535477);
+    }
+
+    #[simd_test(enable = "crc")]
+    unsafe fn test_crc32cd() {
+        assert_eq!(__crc32cd(0, 0), 0);
+        assert_eq!(__crc32cd(0, 18446744073709551615), 3293575501);
+    }
+}