Diff: math/mul/fp_mul_comba_4.c

Revision:

4:cbaf466d717d

Parent:

0:35aa5be3b78d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/math/mul/fp_mul_comba_4.c	Tue Jun 10 14:23:09 2014 +0000
@@ -0,0 +1,47 @@
+#define TFM_DEFINES
+#include "fp_mul_comba.c"
+
+#ifdef TFM_MUL4
+void fp_mul_comba4(fp_int *A, fp_int *B, fp_int *C)
+{
+   fp_digit c0, c1, c2, at[8];
+
+   memcpy(at, A->dp, 4 * sizeof(fp_digit));
+   memcpy(at+4, B->dp, 4 * sizeof(fp_digit));
+   COMBA_START;
+
+   COMBA_CLEAR;
+   /* 0 */
+   MULADD(at[0], at[4]); 
+   COMBA_STORE(C->dp[0]);
+   /* 1 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[5]);    MULADD(at[1], at[4]); 
+   COMBA_STORE(C->dp[1]);
+   /* 2 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[6]);    MULADD(at[1], at[5]);    MULADD(at[2], at[4]); 
+   COMBA_STORE(C->dp[2]);
+   /* 3 */
+   COMBA_FORWARD;
+   MULADD(at[0], at[7]);    MULADD(at[1], at[6]);    MULADD(at[2], at[5]);    MULADD(at[3], at[4]); 
+   COMBA_STORE(C->dp[3]);
+   /* 4 */
+   COMBA_FORWARD;
+   MULADD(at[1], at[7]);    MULADD(at[2], at[6]);    MULADD(at[3], at[5]); 
+   COMBA_STORE(C->dp[4]);
+   /* 5 */
+   COMBA_FORWARD;
+   MULADD(at[2], at[7]);    MULADD(at[3], at[6]); 
+   COMBA_STORE(C->dp[5]);
+   /* 6 */
+   COMBA_FORWARD;
+   MULADD(at[3], at[7]); 
+   COMBA_STORE(C->dp[6]);
+   COMBA_STORE2(C->dp[7]);
+   C->used = 8;
+   C->sign = A->sign ^ B->sign;
+   fp_clamp(C);
+   COMBA_FINI;
+}
+#endif