---

yaml
---
r: 75895
b: refs/heads/master
c: e2b21b5
h: refs/heads/master
i:
  75893: 011980c
  75891: f62e115
  75887: 27ac0ec
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b7a30da61adc5f252ee97b2a4f3fc23c9d06a08a
+refs/heads/master: e2b21b5002a2bf21ca73c7448309a7288a984ddf

trunk/crypto/twofish_common.c

@@ -655,84 +655,48 @@ int twofish_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len)
 			CALC_SB256_2( i, calc_sb_tbl[j], calc_sb_tbl[k] );
 		}
 
-		/* Calculate whitening and round subkeys.  The constants are
-		 * indices of subkeys, preprocessed through q0 and q1. */
-		CALC_K256 (w, 0, 0xA9, 0x75, 0x67, 0xF3);
-		CALC_K256 (w, 2, 0xB3, 0xC6, 0xE8, 0xF4);
-		CALC_K256 (w, 4, 0x04, 0xDB, 0xFD, 0x7B);
-		CALC_K256 (w, 6, 0xA3, 0xFB, 0x76, 0xC8);
-		CALC_K256 (k, 0, 0x9A, 0x4A, 0x92, 0xD3);
-		CALC_K256 (k, 2, 0x80, 0xE6, 0x78, 0x6B);
-		CALC_K256 (k, 4, 0xE4, 0x45, 0xDD, 0x7D);
-		CALC_K256 (k, 6, 0xD1, 0xE8, 0x38, 0x4B);
-		CALC_K256 (k, 8, 0x0D, 0xD6, 0xC6, 0x32);
-		CALC_K256 (k, 10, 0x35, 0xD8, 0x98, 0xFD);
-		CALC_K256 (k, 12, 0x18, 0x37, 0xF7, 0x71);
-		CALC_K256 (k, 14, 0xEC, 0xF1, 0x6C, 0xE1);
-		CALC_K256 (k, 16, 0x43, 0x30, 0x75, 0x0F);
-		CALC_K256 (k, 18, 0x37, 0xF8, 0x26, 0x1B);
-		CALC_K256 (k, 20, 0xFA, 0x87, 0x13, 0xFA);
-		CALC_K256 (k, 22, 0x94, 0x06, 0x48, 0x3F);
-		CALC_K256 (k, 24, 0xF2, 0x5E, 0xD0, 0xBA);
-		CALC_K256 (k, 26, 0x8B, 0xAE, 0x30, 0x5B);
-		CALC_K256 (k, 28, 0x84, 0x8A, 0x54, 0x00);
-		CALC_K256 (k, 30, 0xDF, 0xBC, 0x23, 0x9D);
+		/* CALC_K256/CALC_K192/CALC_K loops were unrolled.
+		 * Unrolling produced x2.5 more code (+18k on i386),
+		 * and speeded up key setup by 7%:
+		 * unrolled: twofish_setkey/sec: 41128
+		 *     loop: twofish_setkey/sec: 38148
+		 * CALC_K256: ~100 insns each
+		 * CALC_K192: ~90 insns
+		 *    CALC_K: ~70 insns
+		 */
+		/* Calculate whitening and round subkeys */
+		for ( i = 0; i < 8; i += 2 ) {
+			CALC_K256 (w, i, q0[i], q1[i], q0[i+1], q1[i+1]);
+		}
+		for ( i = 0; i < 32; i += 2 ) {
+			CALC_K256 (k, i, q0[i+8], q1[i+8], q0[i+9], q1[i+9]);
+		}
 	} else if (key_len == 24) { /* 192-bit key */
 		/* Compute the S-boxes. */
 		for ( i = j = 0, k = 1; i < 256; i++, j += 2, k += 2 ) {
 		        CALC_SB192_2( i, calc_sb_tbl[j], calc_sb_tbl[k] );
 		}
 
-		/* Calculate whitening and round subkeys.  The constants are
-		 * indices of subkeys, preprocessed through q0 and q1. */
-		CALC_K192 (w, 0, 0xA9, 0x75, 0x67, 0xF3);
-		CALC_K192 (w, 2, 0xB3, 0xC6, 0xE8, 0xF4);
-		CALC_K192 (w, 4, 0x04, 0xDB, 0xFD, 0x7B);
-		CALC_K192 (w, 6, 0xA3, 0xFB, 0x76, 0xC8);
-		CALC_K192 (k, 0, 0x9A, 0x4A, 0x92, 0xD3);
-		CALC_K192 (k, 2, 0x80, 0xE6, 0x78, 0x6B);
-		CALC_K192 (k, 4, 0xE4, 0x45, 0xDD, 0x7D);
-		CALC_K192 (k, 6, 0xD1, 0xE8, 0x38, 0x4B);
-		CALC_K192 (k, 8, 0x0D, 0xD6, 0xC6, 0x32);
-		CALC_K192 (k, 10, 0x35, 0xD8, 0x98, 0xFD);
-		CALC_K192 (k, 12, 0x18, 0x37, 0xF7, 0x71);
-		CALC_K192 (k, 14, 0xEC, 0xF1, 0x6C, 0xE1);
-		CALC_K192 (k, 16, 0x43, 0x30, 0x75, 0x0F);
-		CALC_K192 (k, 18, 0x37, 0xF8, 0x26, 0x1B);
-		CALC_K192 (k, 20, 0xFA, 0x87, 0x13, 0xFA);
-		CALC_K192 (k, 22, 0x94, 0x06, 0x48, 0x3F);
-		CALC_K192 (k, 24, 0xF2, 0x5E, 0xD0, 0xBA);
-		CALC_K192 (k, 26, 0x8B, 0xAE, 0x30, 0x5B);
-		CALC_K192 (k, 28, 0x84, 0x8A, 0x54, 0x00);
-		CALC_K192 (k, 30, 0xDF, 0xBC, 0x23, 0x9D);
+		/* Calculate whitening and round subkeys */
+		for ( i = 0; i < 8; i += 2 ) {
+			CALC_K192 (w, i, q0[i], q1[i], q0[i+1], q1[i+1]);
+		}
+		for ( i = 0; i < 32; i += 2 ) {
+			CALC_K192 (k, i, q0[i+8], q1[i+8], q0[i+9], q1[i+9]);
+		}
 	} else { /* 128-bit key */
 		/* Compute the S-boxes. */
 		for ( i = j = 0, k = 1; i < 256; i++, j += 2, k += 2 ) {
 			CALC_SB_2( i, calc_sb_tbl[j], calc_sb_tbl[k] );
 		}
 
-		/* Calculate whitening and round subkeys.  The constants are
-		 * indices of subkeys, preprocessed through q0 and q1. */
-		CALC_K (w, 0, 0xA9, 0x75, 0x67, 0xF3);
-		CALC_K (w, 2, 0xB3, 0xC6, 0xE8, 0xF4);
-		CALC_K (w, 4, 0x04, 0xDB, 0xFD, 0x7B);
-		CALC_K (w, 6, 0xA3, 0xFB, 0x76, 0xC8);
-		CALC_K (k, 0, 0x9A, 0x4A, 0x92, 0xD3);
-		CALC_K (k, 2, 0x80, 0xE6, 0x78, 0x6B);
-		CALC_K (k, 4, 0xE4, 0x45, 0xDD, 0x7D);
-		CALC_K (k, 6, 0xD1, 0xE8, 0x38, 0x4B);
-		CALC_K (k, 8, 0x0D, 0xD6, 0xC6, 0x32);
-		CALC_K (k, 10, 0x35, 0xD8, 0x98, 0xFD);
-		CALC_K (k, 12, 0x18, 0x37, 0xF7, 0x71);
-		CALC_K (k, 14, 0xEC, 0xF1, 0x6C, 0xE1);
-		CALC_K (k, 16, 0x43, 0x30, 0x75, 0x0F);
-		CALC_K (k, 18, 0x37, 0xF8, 0x26, 0x1B);
-		CALC_K (k, 20, 0xFA, 0x87, 0x13, 0xFA);
-		CALC_K (k, 22, 0x94, 0x06, 0x48, 0x3F);
-		CALC_K (k, 24, 0xF2, 0x5E, 0xD0, 0xBA);
-		CALC_K (k, 26, 0x8B, 0xAE, 0x30, 0x5B);
-		CALC_K (k, 28, 0x84, 0x8A, 0x54, 0x00);
-		CALC_K (k, 30, 0xDF, 0xBC, 0x23, 0x9D);
+		/* Calculate whitening and round subkeys */
+		for ( i = 0; i < 8; i += 2 ) {
+			CALC_K (w, i, q0[i], q1[i], q0[i+1], q1[i+1]);
+		}
+		for ( i = 0; i < 32; i += 2 ) {
+			CALC_K (k, i, q0[i+8], q1[i+8], q0[i+9], q1[i+9]);
+		}
 	}
 
 	return 0;