lilliput-ae-reference-implementation

commit 590637c9e555d6ba6b9b0e8e871d1ed926b49911
parent cc2e0ab73ec7d971f8cdb36fc91895b79823ad9a
Author: Kévin Le Gouguec <kevin.legouguec@airbus.com>
Date:   Wed, 20 Feb 2019 15:31:02 +0100

Adaptation du code de α₅

Diffstat:
M
src/add_tweakeyunrolled/tweakey.c
 | 
8
+++++---

1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/src/add_tweakeyunrolled/tweakey.c b/src/add_tweakeyunrolled/tweakey.c
@@ -135,11 +135,13 @@ static void _multiply_MR(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
 
 static void _multiply_MR2(const uint8_t x[LANE_BYTES], uint8_t y[LANE_BYTES])
 {
+    uint8_t x_MR_4 = x[5] ^ x[6]<<3;
+
     y[0] = x[2];
     y[1] = x[3]    ^ x[4]>>3;
-    y[2] = x[4]    ^ x[5]>>3 ^ _M3(x[6]);
-    y[3] = x[5]    ^ x[6]<<3;
-    y[4] = x[3]<<2 ^ x[6]    ^ x[7]<<3;
+    y[2] = x[4]    ^ x_MR_4>>3;
+    y[3] = x_MR_4;
+    y[4] = x[3]<<2 ^ x[6]      ^ x[7]<<3;
     y[5] = x[4]<<2 ^ x[7];
     y[6] = x[0];
     y[7] = x[1];