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math.c: optimization for Bignum

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* math.c (num2dbl_with_to_f): make faster when Bignum passed by
  direct conversion using rb_big2dbl().  [Feature #10800]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49449 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-01-30 08:28:32 +00:00
parent 3d775f1c6f
commit df445b470e
2 changed files with 37 additions and 7 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Fri Jan 30 17:28:29 2015 gogotanaka <mail@tanakakazuki.com>
* math.c (num2dbl_with_to_f): make faster when Bignum passed by
direct conversion using rb_big2dbl(). [Feature #10800]
Thu Jan 29 23:30:00 2015 Kenta Murata <mrkn@mrkn.jp>
* ext/bigdecimal/bigdecimal.c (rb_rational_num): add fallback function

39
math.c
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@ -26,13 +26,38 @@ static ID id_to_f;
VALUE rb_mMath;
VALUE rb_eMathDomainError;
#define fix_to_f_optimizable() rb_method_basic_definition_p(rb_cFixnum, id_to_f)
#define Get_Float(x) \
((RB_TYPE_P((x), T_FLOAT) ? (void)0 : ((x) = rb_to_float(x))), RFLOAT_VALUE(x))
#define Get_Double(x) \
(FIXNUM_P(x) && fix_to_f_optimizable() ? \
(double)FIX2LONG(x) : \
Get_Float(x))
static inline int
basic_to_f_p(VALUE klass)
{
return rb_method_basic_definition_p(klass, id_to_f);
}
static inline double
num2dbl_with_to_f(VALUE num)
{
if (SPECIAL_CONST_P(num)) {
if (FIXNUM_P(num)) {
if (basic_to_f_p(rb_cFixnum))
return (double)FIX2LONG(num);
}
else if (FLONUM_P(num)) {
return RFLOAT_VALUE(num);
}
}
else {
switch (BUILTIN_TYPE(num)) {
case T_FLOAT:
return RFLOAT_VALUE(num);
case T_BIGNUM:
if (basic_to_f_p(rb_cBignum))
return rb_big2dbl(num);
break;
}
}
return RFLOAT_VALUE(rb_to_float(num));
}
#define Get_Double(x) num2dbl_with_to_f(x)
#define domain_error(msg) \
rb_raise(rb_eMathDomainError, "Numerical argument is out of domain - " #msg)