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author | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2006-09-09 15:27:34 +0000 |
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committer | matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2006-09-09 15:27:34 +0000 |
commit | a5f34606ff63708523abe05be9994aa91554a459 (patch) | |
tree | 903e00525a2e291298f232b1c1591f9656a60378 /bignum.c | |
parent | 25f41cb52253acc0edc5340838c6c445cc2527d2 (diff) | |
download | ruby-a5f34606ff63708523abe05be9994aa91554a459.tar.gz ruby-a5f34606ff63708523abe05be9994aa91554a459.tar.xz ruby-a5f34606ff63708523abe05be9994aa91554a459.zip |
* bignum.c (rb_big_mul0): bignum multiplication without
normalization.
* bignum.c (rb_big_pow): use rb_big_mul0(). [ruby-dev:29547]
git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_8@10898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'bignum.c')
-rw-r--r-- | bignum.c | 29 |
1 files changed, 18 insertions, 11 deletions
@@ -1206,15 +1206,8 @@ rb_big_minus(x, y) } } -/* - * call-seq: - * big * other => Numeric - * - * Multiplies big and other, returning the result. - */ - VALUE -rb_big_mul(x, y) +rb_big_mul0(x, y) VALUE x, y; { long i, j; @@ -1257,7 +1250,21 @@ rb_big_mul(x, y) } } - return bignorm(z); + return z; +} + +/* + * call-seq: + * big * other => Numeric + * + * Multiplies big and other, returning the result. + */ + +VALUE +rb_big_mul(x, y) + VALUE x, y; +{ + return bignorm(rb_big_mul0(x, y)); } static void @@ -1616,10 +1623,10 @@ rb_big_pow(x, y) if (yy == 0) break; while (yy % 2 == 0) { yy /= 2; - x = rb_big_mul(x, x); + x = rb_big_mul0(x, x); if (!BDIGITS(x)[RBIGNUM(x)->len-1]) RBIGNUM(x)->len--; } - z = rb_big_mul(z, x); + z = rb_big_mul0(z, x); if (!BDIGITS(z)[RBIGNUM(z)->len-1]) RBIGNUM(z)->len--; } return bignorm(z); |