diff options
author | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-08-13 15:21:42 +0000 |
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committer | akr <akr@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2013-08-13 15:21:42 +0000 |
commit | f069f26bc21bca6cf21181503f500418092c16c4 (patch) | |
tree | bf9773a71da089180fb50b96d9d06439b65a22f4 /bignum.c | |
parent | 26e69a89fa8098c29e0afb64d66dcd5dbff8f76b (diff) | |
download | ruby-f069f26bc21bca6cf21181503f500418092c16c4.tar.gz |
* bignum.c (big_div_struct): Remove xn and j field. Add zn field.
(bigdivrem1): Follow the above change.
(bigdivrem_restoring): Ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42545 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'bignum.c')
-rw-r--r-- | bignum.c | 25 |
1 files changed, 12 insertions, 13 deletions
@@ -2625,7 +2625,7 @@ bary_mul(BDIGIT *zds, size_t zn, const BDIGIT *xds, size_t xn, const BDIGIT *yds } struct big_div_struct { - size_t xn, yn, j; + size_t yn, zn; BDIGIT *yds, *zds; volatile VALUE stop; }; @@ -2635,33 +2635,33 @@ bigdivrem1(void *ptr) { struct big_div_struct *bds = (struct big_div_struct*)ptr; size_t yn = bds->yn; - size_t j; + size_t zn = bds->zn; BDIGIT *yds = bds->yds, *zds = bds->zds; BDIGIT_DBL_SIGNED num; BDIGIT q; - j = bds->j; do { if (bds->stop) { - bds->j = j; + bds->zn = zn; return 0; } - if (zds[j] == yds[yn-1]) q = BDIGMAX; - else q = (BDIGIT)((BIGUP(zds[j]) + zds[j-1])/yds[yn-1]); + if (zds[zn-1] == yds[yn-1]) q = BDIGMAX; + else q = (BDIGIT)((BIGUP(zds[zn-1]) + zds[zn-2])/yds[yn-1]); if (q) { - num = bigdivrem_mulsub(zds+j-yn, yn+1, + num = bigdivrem_mulsub(zds+zn-(yn+1), yn+1, q, yds, yn); while (num) { /* "add back" required */ q--; - num = bary_add(zds+j-yn, yn, - zds+j-yn, yn, + num = bary_add(zds+zn-(yn+1), yn, + zds+zn-(yn+1), yn, yds, yn); num--; } } - zds[j] = q; - } while (--j >= yn); + zn--; + zds[zn] = q; + } while (zn > yn); return 0; } @@ -2704,12 +2704,11 @@ bigdivrem_restoring(BDIGIT *zds, size_t zn, size_t xn, BDIGIT *yds, size_t yn) assert(BDIGIT_MSB(yds[yn-1])); for (ynzero = 0; !yds[ynzero]; ynzero++); - bds.xn = xn - ynzero; bds.yn = yn - ynzero; bds.zds = zds + ynzero; bds.yds = yds + ynzero; bds.stop = Qfalse; - bds.j = zn - 1 - ynzero; + bds.zn = zn - ynzero; if (xn > 10000 || yn > 10000) { retry: bds.stop = Qfalse; |