Remove calls to crc_u32 and add clib_crc32c for armv8+crc

crc_u32 was not defined for non x86_64 with SSE4.2 processors.

Calls to "crc_u32" are removed and replaced by either a call to
clib_crc32c or a call to clib_xxhash, as the result is not used
as a check value but as a hash.

Change-Id: I3af4d68e2e5ebd0c9b0a6090f848d043cb0f20a2
Signed-off-by: Christophe Fontaine <christophe.fontaine@enea.com>

1 files changed, 16 insertions, 26 deletions

diff --git a/src/vnet/map/map.c b/src/vnet/map/map.c
index 8579cdf6a7b..d246f6c8254 100644
--- a/src/vnet/map/map.c
+++ b/src/vnet/map/map.c
@@ -19,29 +19,10 @@
 #include <vnet/fib/ip6_fib.h>
 #include <vnet/adj/adj.h>
 #include <vnet/map/map_dpo.h>
+#include <vppinfra/crc32.h>
 
 #include "map.h"
 
-#ifdef __SSE4_2__
-static inline u32
-crc_u32 (u32 data, u32 value)
-{
-  __asm__ volatile ("crc32l %[data], %[value];":[value] "+r" (value):[data]
-		    "rm" (data));
-  return value;
-}
-#else
-#include <vppinfra/xxhash.h>
-
-static inline u32
-crc_u32 (u32 data, u32 value)
-{
-  u64 tmp = ((u64) data << 32) | (u64) value;
-  return (u32) clib_xxhash (tmp);
-}
-#endif
-
-
 /*
  * This code supports the following MAP modes:
  *
@@ -1488,10 +1469,12 @@ map_ip4_reass_get (u32 src, u32 dst, u16 fragment_id,
   };
 
   u32 h = 0;
-  h = crc_u32 (k.as_u32[0], h);
-  h = crc_u32 (k.as_u32[1], h);
-  h = crc_u32 (k.as_u32[2], h);
-  h = crc_u32 (k.as_u32[3], h);
+#ifdef clib_crc32c_uses_intrinsics
+  h = clib_crc32c ((u8 *) k.as_u32, 16);
+#else
+  u64 tmp = k.as_u32[0] ^ k.as_u32[1] ^ k.as_u32[2] ^ k.as_u32[3];
+  h = clib_xxhash (tmp);
+#endif
   h = h >> (32 - mm->ip4_reass_ht_log2len);
 
   f64 now = vlib_time_now (mm->vlib_main);
@@ -1660,8 +1643,15 @@ map_ip6_reass_get (ip6_address_t * src, ip6_address_t * dst, u32 fragment_id,
 
   u32 h = 0;
   int i;
-  for (i = 0; i < 10; i++)
-    h = crc_u32 (k.as_u32[i], h);
+
+#ifdef clib_crc32c_uses_intrinsics
+  h = clib_crc32c ((u8 *) k.as_u32, 40);
+#else
+  u64 tmp =
+    k.as_u64[0] ^ k.as_u64[1] ^ k.as_u64[2] ^ k.as_u64[3] ^ k.as_u64[4];
+  h = clib_xxhash (tmp);
+#endif
+
   h = h >> (32 - mm->ip6_reass_ht_log2len);
 
   f64 now = vlib_time_now (mm->vlib_main);