+#ifndef SILC_AES_ASM
+/* C version of AES */
+
+#define si(y,x,k,c) (s(y,c) = word_in(x, c) ^ (k)[c])
+#define so(y,x,c) word_out(y, c, s(x,c))
+#define locals(y,x) x[4],y[4]
+#define l_copy(y, x) s(y,0) = s(x,0); s(y,1) = s(x,1); \
+ s(y,2) = s(x,2); s(y,3) = s(x,3);
+#define state_in(y,x,k) si(y,x,k,0); si(y,x,k,1); si(y,x,k,2); si(y,x,k,3)
+#define state_out(y,x) so(y,x,0); so(y,x,1); so(y,x,2); so(y,x,3)
+#define round(rm,y,x,k) rm(y,x,k,0); rm(y,x,k,1); rm(y,x,k,2); rm(y,x,k,3)
+
+/* Visual C++ .Net v7.1 provides the fastest encryption code when using
+ Pentium optimiation with small code but this is poor for decryption
+ so we need to control this with the following VC++ pragmas
+*/
+
+#if defined( _MSC_VER ) && !defined( _WIN64 )
+#pragma optimize( "s", on )
+#endif
+
+#define fwd_var(x,r,c)\
+ ( r == 0 ? ( c == 0 ? s(x,0) : c == 1 ? s(x,1) : c == 2 ? s(x,2) : s(x,3))\
+ : r == 1 ? ( c == 0 ? s(x,1) : c == 1 ? s(x,2) : c == 2 ? s(x,3) : s(x,0))\
+ : r == 2 ? ( c == 0 ? s(x,2) : c == 1 ? s(x,3) : c == 2 ? s(x,0) : s(x,1))\
+ : ( c == 0 ? s(x,3) : c == 1 ? s(x,0) : c == 2 ? s(x,1) : s(x,2)))
+#define fwd_rnd(y,x,k,c) (s(y,c) = (k)[c] ^ four_tables(x,t_use(f,n),fwd_var,rf1,c))
+#define fwd_lrnd(y,x,k,c) (s(y,c) = (k)[c] ^ four_tables(x,t_use(f,l),fwd_var,rf1,c))