127 lines
2.7 KiB
C
127 lines
2.7 KiB
C
/* TomsFastMath, a fast ISO C bignum library.
|
|
*
|
|
* This project is meant to fill in where LibTomMath
|
|
* falls short. That is speed ;-)
|
|
*
|
|
* This project is public domain and free for all purposes.
|
|
*
|
|
* Tom St Denis, tomstdenis@gmail.com
|
|
*/
|
|
#include <tfm_private.h>
|
|
|
|
/* b = a*a */
|
|
void fp_sqr(fp_int *A, fp_int *B)
|
|
{
|
|
int y, old_used;
|
|
|
|
old_used = B->used;
|
|
|
|
/* call generic if we're out of range */
|
|
if (A->used + A->used > FP_SIZE) {
|
|
fp_sqr_comba(A, B);
|
|
goto clean;
|
|
}
|
|
|
|
y = A->used;
|
|
#if defined(TFM_SQR3) && FP_SIZE >= 6
|
|
if (y <= 3) {
|
|
fp_sqr_comba3(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR4) && FP_SIZE >= 8
|
|
if (y == 4) {
|
|
fp_sqr_comba4(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR6) && FP_SIZE >= 12
|
|
if (y <= 6) {
|
|
fp_sqr_comba6(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR7) && FP_SIZE >= 14
|
|
if (y == 7) {
|
|
fp_sqr_comba7(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR8) && FP_SIZE >= 16
|
|
if (y == 8) {
|
|
fp_sqr_comba8(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR9) && FP_SIZE >= 18
|
|
if (y == 9) {
|
|
fp_sqr_comba9(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR12) && FP_SIZE >= 24
|
|
if (y <= 12) {
|
|
fp_sqr_comba12(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR17) && FP_SIZE >= 34
|
|
if (y <= 17) {
|
|
fp_sqr_comba17(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SMALL_SET)
|
|
if (y <= 16) {
|
|
fp_sqr_comba_small(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR20) && FP_SIZE >= 40
|
|
if (y <= 20) {
|
|
fp_sqr_comba20(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR24) && FP_SIZE >= 48
|
|
if (y <= 24) {
|
|
fp_sqr_comba24(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR28) && FP_SIZE >= 56
|
|
if (y <= 28) {
|
|
fp_sqr_comba28(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR32) && FP_SIZE >= 64
|
|
if (y <= 32) {
|
|
fp_sqr_comba32(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR48) && FP_SIZE >= 96
|
|
if (y <= 48) {
|
|
fp_sqr_comba48(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
#if defined(TFM_SQR64) && FP_SIZE >= 128
|
|
if (y <= 64) {
|
|
fp_sqr_comba64(A,B);
|
|
goto clean;
|
|
}
|
|
#endif
|
|
fp_sqr_comba(A, B);
|
|
clean:
|
|
for (y = B->used; y < old_used; y++) {
|
|
B->dp[y] = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/* $Source: /cvs/libtom/tomsfastmath/src/sqr/fp_sqr.c,v $ */
|
|
/* $Revision: 1.1 $ */
|
|
/* $Date: 2006/12/31 21:25:53 $ */
|