Author: hhinnant
Date: Wed Sep 19 18:51:47 2012
New Revision: 164266
URL: http://llvm.org/viewvc/llvm-project?rev=164266&view=rev
Log:
Add overflow check to tanh(complex) and reduce to finite answer. Fixes
http://llvm.org/bugs/show_bug.cgi?id=13874
Modified:
libcxx/trunk/include/complex
libcxx/trunk/test/numerics/complex.number/complex.transcendentals/tan.pass.cpp
Modified: libcxx/trunk/include/complex
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/include/complex?rev=164266&r1=164265&r2=164266&view=diff
==============================================================================
--- libcxx/trunk/include/complex (original)
+++ libcxx/trunk/include/complex Wed Sep 19 18:51:47 2012
@@ -1351,7 +1351,11 @@
_Tp __2r(_Tp(2) * __x.real());
_Tp __2i(_Tp(2) * __x.imag());
_Tp __d(cosh(__2r) + cos(__2i));
- return complex<_Tp>(sinh(__2r)/__d, sin(__2i)/__d);
+ _Tp __2rsh(sinh(__2r));
+ if (isinf(__2rsh) && isinf(__d))
+ return complex<_Tp>(__2rsh > _Tp(0) ? _Tp(1) : _Tp(-1),
+ __2i > _Tp(0) ? _Tp(0) : _Tp(-0.));
+ return complex<_Tp>(__2rsh/__d, sin(__2i)/__d);
}
// asin
Modified:
libcxx/trunk/test/numerics/complex.number/complex.transcendentals/tan.pass.cpp
URL:
http://llvm.org/viewvc/llvm-project/libcxx/trunk/test/numerics/complex.number/complex.transcendentals/tan.pass.cpp?rev=164266&r1=164265&r2=164266&view=diff
==============================================================================
---
libcxx/trunk/test/numerics/complex.number/complex.transcendentals/tan.pass.cpp
(original)
+++
libcxx/trunk/test/numerics/complex.number/complex.transcendentals/tan.pass.cpp
Wed Sep 19 18:51:47 2012
@@ -30,6 +30,7 @@
test()
{
test(std::complex<T>(0, 0), std::complex<T>(0, 0));
+ test(std::complex<T>(10000, -10000), std::complex<T>(0, -1));
}
void test_edges()
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