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* math.c (rb_math_sqrt): r55646 must use f_signbit.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55657 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
naruse 2016-07-13 05:29:30 +00:00
parent d8c3672b01
commit 7b59234aaf
2 changed files with 23 additions and 1 deletions
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4
ChangeLog
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@ -1,3 +1,7 @@
Wed Jul 13 14:28:33 2016 NARUSE, Yui <naruse@ruby-lang.org>
* math.c (rb_math_sqrt): r55646 must use f_signbit.
Wed Jul 13 14:22:50 2016 Koichi Sasada <ko1@atdot.net> Wed Jul 13 14:22:50 2016 Koichi Sasada <ko1@atdot.net>
* iseq.c (Init_ISeq): undef ISeq.translate and ISeq.load_iseq * iseq.c (Init_ISeq): undef ISeq.translate and ISeq.load_iseq

20
math.c
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@ -591,13 +591,31 @@ math_sqrt(VALUE obj, VALUE x)
return rb_math_sqrt(x); return rb_math_sqrt(x);
} }
#define f_boolcast(x) ((x) ? Qtrue : Qfalse)
inline static VALUE
f_negative_p(VALUE x)
{
if (FIXNUM_P(x))
return f_boolcast(FIX2LONG(x) < 0);
return rb_funcall(x, '<', 1, INT2FIX(0));
}
inline static VALUE
f_signbit(VALUE x)
{
if (RB_TYPE_P(x, T_FLOAT)) {
double f = RFLOAT_VALUE(x);
return f_boolcast(!isnan(f) && signbit(f));
}
return f_negative_p(x);
}
VALUE VALUE
rb_math_sqrt(VALUE x) rb_math_sqrt(VALUE x)
{ {
double d; double d;
if (RB_TYPE_P(x, T_COMPLEX)) { if (RB_TYPE_P(x, T_COMPLEX)) {
int neg = signbit(RCOMPLEX(x)->imag); int neg = f_signbit(RCOMPLEX(x)->imag);
double re = Get_Double(RCOMPLEX(x)->real), im; double re = Get_Double(RCOMPLEX(x)->real), im;
d = Get_Double(rb_complex_abs(x)); d = Get_Double(rb_complex_abs(x));
im = sqrt((d - re) / 2.0); im = sqrt((d - re) / 2.0);