tls: code shrink

function                                             old     new   delta
lm_add                                                82      78      -4
curve25519                                           793     786      -7
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/2 up/down: 0/-11)             Total: -11 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

diff --git a/networking/tls_fe.c b/networking/tls_fe.c
index f235082f536f861dd89d76238d57e10b63dc453a..10971bbff892d0b391adb4d82d6228944098a6db 100644 (file)
--- a/networking/tls_fe.c
+++ b/networking/tls_fe.c
@@ -43,17 +43,13 @@ typedef uint32_t word32;
 #if 0 //UNUSED
 static void fprime_copy(byte *x, const byte *a)
 {
-    int i;
-    for (i = 0; i < F25519_SIZE; i++)
-        x[i] = a[i];
+       memcpy(x, a, F25519_SIZE);
 }
 #endif
 
 static void lm_copy(byte* x, const byte* a)
 {
-    int i;
-    for (i = 0; i < F25519_SIZE; i++)
-        x[i] = a[i];
+       memcpy(x, a, F25519_SIZE);
 }
 
 #if 0 //UNUSED
@@ -200,7 +196,7 @@ static void fe_load(byte *x, word32 c)
 static void fe_normalize(byte *x)
 {
        byte minusp[F25519_SIZE];
-       word16 c;
+       unsigned c;
        int i;
 
        /* Reduce using 2^255 = 19 mod p */
@@ -219,13 +215,13 @@ static void fe_normalize(byte *x)
         */
        c = 19;
 
-       for (i = 0; i + 1 < F25519_SIZE; i++) {
+       for (i = 0; i < F25519_SIZE - 1; i++) {
                c += x[i];
                minusp[i] = (byte)c;
                c >>= 8;
        }
 
-       c += ((word16)x[i]) - 128;
+       c += ((unsigned)x[i]) - 128;
        minusp[31] = (byte)c;
 
        /* Load x-p if no underflow */
@@ -234,13 +230,13 @@ static void fe_normalize(byte *x)
 
 static void lm_add(byte* r, const byte* a, const byte* b)
 {
-       word16 c = 0;
+       unsigned c = 0;
        int i;
 
        /* Add */
        for (i = 0; i < F25519_SIZE; i++) {
                c >>= 8;
-               c += ((word16)a[i]) + ((word16)b[i]);
+               c += ((unsigned)a[i]) + ((unsigned)b[i]);
                r[i] = (byte)c;
        }