forked from ibphoenix/tomsfastmath
c32affe350
The comba sqr code does not check the maximum bounds of fp_int; eg: if you invoke fp_sqr_comba_20, it will write 40 digits to the destination even if FP_SIZE < 40. This is correct for achieving high speeds, but it means that it is the caller's responsibility to check for such overflows. fp_sqr.c only checks for numeric overflows (a->used * 2 >= FP_SIZE) though. This means that if you call fp_sqr() with a small number (say 1), and your FP_SIZE is 10, and you have enabled a fp_sqr_comba_8, it will overflow your buffer by writing 16 digits. Since the exact subset of active comba multipliers/sqrs are up to the user (in tfm.h), we fix the code never to invoke them if they can cause overflows. |
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| .. | ||
| fp_sqr_comba_3.c | ||
| fp_sqr_comba_4.c | ||
| fp_sqr_comba_6.c | ||
| fp_sqr_comba_7.c | ||
| fp_sqr_comba_8.c | ||
| fp_sqr_comba_9.c | ||
| fp_sqr_comba_12.c | ||
| fp_sqr_comba_17.c | ||
| fp_sqr_comba_20.c | ||
| fp_sqr_comba_24.c | ||
| fp_sqr_comba_28.c | ||
| fp_sqr_comba_32.c | ||
| fp_sqr_comba_48.c | ||
| fp_sqr_comba_64.c | ||
| fp_sqr_comba_generic.c | ||
| fp_sqr_comba_small_set.c | ||
| fp_sqr_comba.c | ||
| fp_sqr.c | ||
| fp_sqrmod.c | ||