https://llvm.org/bugs/show_bug.cgi?id=28936
Bug ID: 28936
Summary: std/numerics/complex.number/complex.transcendentals/as
in.pass.cpp depends on the sign bit of NaN numbers
Product: libc++
Version: 3.9
Hardware: PC
OS: Linux
Status: NEW
Severity: release blocker
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: vasileios.kalinti...@imgtec.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Blocks: 28600
Classification: Unclassified
I marked this test as a release blocker because it is failing in the 3.9rc1
release. However, even though I'm not too familiar with the IEEE754 standard, I
believe that this test relies on behaviour specified by the newer, 2008
revision.
One test case that fails is std::complex<double>(NAN, -2) which on the MIPS
board produces r=(NAN, NAN), instead of the expected (NAN,-NAN) value:
else if (std::isnan(testcases[i].real()) && std::isfinite(testcases[i].imag()))
{
assert(std::isnan(r.real()));
assert(std::isnan(r.imag()));
assert(std::signbit(testcases[i].imag()) == std::signbit(r.imag()));
}
All the cases from "cases.h" that fail on the asin.pass.cpp test, depend on the
sign-bit being set for NaNs too.
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