From 9f03d0fc04805d22922be8a89a11a32054aa7e1d Mon Sep 17 00:00:00 2001
From: Andy Polyakov <appro@openssl.org>
Date: Mon, 22 Dec 2008 14:10:42 +0000
Subject: [PATCH] Optimize #undef DES_UNROLL for size.

---
 crypto/des/des_enc.c  | 16 ++++------------
 crypto/des/ecb_enc.c  |  2 +-
 crypto/des/fcrypt_b.c |  4 +---
 3 files changed, 6 insertions(+), 16 deletions(-)

diff --git a/crypto/des/des_enc.c b/crypto/des/des_enc.c
index ab0b438083..828feba208 100644
--- a/crypto/des/des_enc.c
+++ b/crypto/des/des_enc.c
@@ -108,12 +108,10 @@ void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
 		D_ENCRYPT(l,r,28); /*  15 */
 		D_ENCRYPT(r,l,30); /*  16 */
 #else
-		for (i=0; i<32; i+=8)
+		for (i=0; i<32; i+=4)
 			{
 			D_ENCRYPT(l,r,i+0); /*  1 */
 			D_ENCRYPT(r,l,i+2); /*  2 */
-			D_ENCRYPT(l,r,i+4); /*  3 */
-			D_ENCRYPT(r,l,i+6); /*  4 */
 			}
 #endif
 		}
@@ -137,12 +135,10 @@ void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
 		D_ENCRYPT(l,r, 2); /*  2 */
 		D_ENCRYPT(r,l, 0); /*  1 */
 #else
-		for (i=30; i>0; i-=8)
+		for (i=30; i>0; i-=4)
 			{
 			D_ENCRYPT(l,r,i-0); /* 16 */
 			D_ENCRYPT(r,l,i-2); /* 15 */
-			D_ENCRYPT(l,r,i-4); /* 14 */
-			D_ENCRYPT(r,l,i-6); /* 13 */
 			}
 #endif
 		}
@@ -204,12 +200,10 @@ void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
 		D_ENCRYPT(l,r,28); /*  15 */
 		D_ENCRYPT(r,l,30); /*  16 */
 #else
-		for (i=0; i<32; i+=8)
+		for (i=0; i<32; i+=4)
 			{
 			D_ENCRYPT(l,r,i+0); /*  1 */
 			D_ENCRYPT(r,l,i+2); /*  2 */
-			D_ENCRYPT(l,r,i+4); /*  3 */
-			D_ENCRYPT(r,l,i+6); /*  4 */
 			}
 #endif
 		}
@@ -233,12 +227,10 @@ void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc)
 		D_ENCRYPT(l,r, 2); /*  2 */
 		D_ENCRYPT(r,l, 0); /*  1 */
 #else
-		for (i=30; i>0; i-=8)
+		for (i=30; i>0; i-=4)
 			{
 			D_ENCRYPT(l,r,i-0); /* 16 */
 			D_ENCRYPT(r,l,i-2); /* 15 */
-			D_ENCRYPT(l,r,i-4); /* 14 */
-			D_ENCRYPT(r,l,i-6); /* 13 */
 			}
 #endif
 		}
diff --git a/crypto/des/ecb_enc.c b/crypto/des/ecb_enc.c
index 0861988323..0684e769b3 100644
--- a/crypto/des/ecb_enc.c
+++ b/crypto/des/ecb_enc.c
@@ -91,7 +91,7 @@ const char *DES_options(void)
 #ifdef DES_UNROLL
 		unroll="16";
 #else
-		unroll="4";
+		unroll="2";
 #endif
 		if (sizeof(DES_LONG) != sizeof(long))
 			size="int";
diff --git a/crypto/des/fcrypt_b.c b/crypto/des/fcrypt_b.c
index 1390138787..8822816938 100644
--- a/crypto/des/fcrypt_b.c
+++ b/crypto/des/fcrypt_b.c
@@ -100,12 +100,10 @@ void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, DES_LONG Eswap0,
 #ifndef DES_UNROLL
 		register int i;
 
-		for (i=0; i<32; i+=8)
+		for (i=0; i<32; i+=4)
 			{
 			D_ENCRYPT(l,r,i+0); /*  1 */
 			D_ENCRYPT(r,l,i+2); /*  2 */
-			D_ENCRYPT(l,r,i+4); /*  1 */
-			D_ENCRYPT(r,l,i+6); /*  2 */
 			}
 #else
 		D_ENCRYPT(l,r, 0); /*  1 */
-- 
2.25.1