fp_sqr_comba_3.c

00001 #define TFM_DEFINES
00002 #include "fp_sqr_comba.c"
00003 
00004 #ifdef TFM_SQR3
00005 void fp_sqr_comba3(fp_int *A, fp_int *B)
00006 {
00007    fp_digit *a, b[6], c0, c1, c2, sc0, sc1, sc2;
00008 #ifdef TFM_ISO
00009    fp_word tt;
00010 #endif
00011 
00012    a = A->dp;
00013    COMBA_START; 
00014 
00015    /* clear carries */
00016    CLEAR_CARRY;
00017 
00018    /* output 0 */
00019    SQRADD(a[0],a[0]);
00020    COMBA_STORE(b[0]);
00021 
00022    /* output 1 */
00023    CARRY_FORWARD;
00024    SQRADD2(a[0], a[1]); 
00025    COMBA_STORE(b[1]);
00026 
00027    /* output 2 */
00028    CARRY_FORWARD;
00029    SQRADD2(a[0], a[2]); SQRADD(a[1], a[1]); 
00030    COMBA_STORE(b[2]);
00031 
00032    /* output 3 */
00033    CARRY_FORWARD;
00034    SQRADD2(a[1], a[2]); 
00035    COMBA_STORE(b[3]);
00036 
00037    /* output 4 */
00038    CARRY_FORWARD;
00039    SQRADD(a[2], a[2]); 
00040    COMBA_STORE(b[4]);
00041    COMBA_STORE2(b[5]);
00042    COMBA_FINI;
00043 
00044    B->used = 6;
00045    B->sign = FP_ZPOS;
00046    memcpy(B->dp, b, 6 * sizeof(fp_digit));
00047    fp_clamp(B);
00048 }
00049 #endif
00050 
00051 
00052 /* $Source: /cvs/libtom/tomsfastmath/src/sqr/fp_sqr_comba_3.c,v $ */
00053 /* $Revision: 1.2 $ */
00054 /* $Date: 2007/02/17 03:39:01 $ */