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1) State restrictions for the transform length.

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2) Switch argument order to match the function signature of mpd_calloc()
   (cosmetic change, since the order is irrelevant).
This commit is contained in:
Stefan Krah 2012-06-10 16:50:55 +02:00
parent 1c2018c311
commit 9253862f45
1 changed files with 10 additions and 5 deletions
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15
Modules/_decimal/libmpdec/mpdecimal.c
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@ -5158,7 +5158,11 @@ _mpd_kmul(const mpd_uint_t *u, const mpd_uint_t *v,
} }
/* Determine the minimum length for the number theoretic transform. */ /*
* Determine the minimum length for the number theoretic transform. Valid
* transform lengths are 2**n or 3*2**n, where 2**n <= MPD_MAXTRANSFORM_2N.
* The function finds the shortest length m such that rsize <= m.
*/
static inline mpd_size_t static inline mpd_size_t
_mpd_get_transform_len(mpd_size_t rsize) _mpd_get_transform_len(mpd_size_t rsize)
{ {
@ -5169,6 +5173,7 @@ _mpd_get_transform_len(mpd_size_t rsize)
log2rsize = mpd_bsr(rsize); log2rsize = mpd_bsr(rsize);
if (rsize <= 1024) { if (rsize <= 1024) {
/* 2**n is faster in this range. */
x = ((mpd_size_t)1)<<log2rsize; x = ((mpd_size_t)1)<<log2rsize;
return (rsize == x) ? x : x<<1; return (rsize == x) ? x : x<<1;
} }
@ -5264,13 +5269,13 @@ _mpd_fntmul(const mpd_uint_t *u, const mpd_uint_t *v,
goto malloc_error; goto malloc_error;
} }
if ((c1 = mpd_calloc(sizeof *c1, n)) == NULL) { if ((c1 = mpd_calloc(n, sizeof *c1)) == NULL) {
goto malloc_error; goto malloc_error;
} }
if ((c2 = mpd_calloc(sizeof *c2, n)) == NULL) { if ((c2 = mpd_calloc(n, sizeof *c2)) == NULL) {
goto malloc_error; goto malloc_error;
} }
if ((c3 = mpd_calloc(sizeof *c3, n)) == NULL) { if ((c3 = mpd_calloc(n, sizeof *c3)) == NULL) {
goto malloc_error; goto malloc_error;
} }
@ -5286,7 +5291,7 @@ _mpd_fntmul(const mpd_uint_t *u, const mpd_uint_t *v,
} }
} }
else { else {
if ((vtmp = mpd_calloc(sizeof *vtmp, n)) == NULL) { if ((vtmp = mpd_calloc(n, sizeof *vtmp)) == NULL) {
goto malloc_error; goto malloc_error;
} }