diff tomsfastmath/src/sqr/fp_sqr_comba_3.c @ 643:a362b62d38b2 dropbear-tfm

Add tomsfastmath from git rev bfa4582842bc3bab42e4be4aed5703437049502a with Makefile.in renamed
author Matt Johnston <matt@ucc.asn.au>
date Wed, 23 Nov 2011 18:10:20 +0700
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--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tomsfastmath/src/sqr/fp_sqr_comba_3.c	Wed Nov 23 18:10:20 2011 +0700
@@ -0,0 +1,52 @@
+#define TFM_DEFINES
+#include "fp_sqr_comba.c"
+
+#ifdef TFM_SQR3
+void fp_sqr_comba3(fp_int *A, fp_int *B)
+{
+   fp_digit *a, b[6], c0, c1, c2, sc0, sc1, sc2;
+#ifdef TFM_ISO
+   fp_word tt;
+#endif
+
+   a = A->dp;
+   COMBA_START; 
+
+   /* clear carries */
+   CLEAR_CARRY;
+
+   /* output 0 */
+   SQRADD(a[0],a[0]);
+   COMBA_STORE(b[0]);
+
+   /* output 1 */
+   CARRY_FORWARD;
+   SQRADD2(a[0], a[1]); 
+   COMBA_STORE(b[1]);
+
+   /* output 2 */
+   CARRY_FORWARD;
+   SQRADD2(a[0], a[2]); SQRADD(a[1], a[1]); 
+   COMBA_STORE(b[2]);
+
+   /* output 3 */
+   CARRY_FORWARD;
+   SQRADD2(a[1], a[2]); 
+   COMBA_STORE(b[3]);
+
+   /* output 4 */
+   CARRY_FORWARD;
+   SQRADD(a[2], a[2]); 
+   COMBA_STORE(b[4]);
+   COMBA_STORE2(b[5]);
+   COMBA_FINI;
+
+   B->used = 6;
+   B->sign = FP_ZPOS;
+   memcpy(B->dp, b, 6 * sizeof(fp_digit));
+   memset(B->dp + 6, 0, (FP_SIZE - 6) * sizeof(fp_digit));
+   fp_clamp(B);
+}
+#endif
+
+