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* bignum.c (bary_sq_fast): Specialize the last iteration of the
outer loop. (bigfixize): A condition simplified. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42044 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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@ -1,3 +1,9 @@
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Thu Jul 18 21:30:50 2013 Tanaka Akira <akr@fsij.org>
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* bignum.c (bary_sq_fast): Specialize the last iteration of the
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outer loop.
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(bigfixize): A condition simplified.
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Thu Jul 18 21:15:41 2013 Masaki Matsushita <glass.saga@gmail.com>
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* array.c (rb_ary_equal): compare RARRAY_PTR() for performance
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25
bignum.c
25
bignum.c
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@ -1605,7 +1605,11 @@ bary_sq_fast(BDIGIT *zds, size_t zn, BDIGIT *xds, size_t xn)
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assert(xn * 2 <= zn);
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BDIGITS_ZERO(zds, zn);
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for (i = 0; i < xn; i++) {
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if (xn == 0)
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return;
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for (i = 0; i < xn-1; i++) {
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v = (BDIGIT_DBL)xds[i];
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if (!v)
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continue;
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@ -1625,11 +1629,22 @@ bary_sq_fast(BDIGIT *zds, size_t zn, BDIGIT *xds, size_t xn)
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c += (BDIGIT_DBL)zds[i + xn];
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zds[i + xn] = BIGLO(c);
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c = BIGDN(c);
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assert(c == 0 || i != xn-1);
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if (c && i != xn-1)
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if (c)
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zds[i + xn + 1] += (BDIGIT)c;
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}
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}
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/* i == xn-1 */
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v = (BDIGIT_DBL)xds[i];
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if (!v)
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return;
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c = (BDIGIT_DBL)zds[i + i] + v * v;
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zds[i + i] = BIGLO(c);
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c = BIGDN(c);
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if (c) {
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c += (BDIGIT_DBL)zds[i + xn];
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zds[i + xn] = BIGLO(c);
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}
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}
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VALUE
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@ -2336,11 +2351,11 @@ bigfixize(VALUE x)
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int i = (int)len;
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u = 0;
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while (i--) {
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u = (long)(BIGUP(u) + ds[i]);
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u = (unsigned long)(BIGUP(u) + ds[i]);
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}
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}
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#else /* SIZEOF_BDIGITS >= SIZEOF_LONG */
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if (1 < len || LONG_MAX < ds[0])
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if (1 < len)
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goto return_big;
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else
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u = ds[0];
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