arm64: Re-add arm crc32c hw acceleration

Use the .arch_extension directive so that a config options and
special cflags aren't required. Add a few tests for both the
software and hardware implementations

1 files changed, 3 insertions, 0 deletions

diff --git a/crc32c.h b/crc32c.h
index 10ffd4f..1fcf927 100644
--- a/crc32c.h
+++ b/crc32c.h
@@ -17,4 +17,7 @@ extern crc_func crc32c;
 
 void crc32c_init(void);
 
+// Expose a prototype for the crc32c software variant simply for testing purposes
+uint32_t crc32c_sw(uint32_t crc, void const *buf, size_t len);
+
 #endif    /* CRC32C_H */