https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66326
Bug ID: 66326 Summary: Floating point exception with -mfpmath=387 and -fcilkplus. Product: gcc Version: 5.1.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: c Assignee: unassigned at gcc dot gnu.org Reporter: ejolson at unr dot edu Target Milestone: --- Created attachment 35648 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35648&action=edit Test code to illustrate bug. Must be run on at least a 2-core system. There appears a regression between the cilkplus-4_8-branch and the gcc-4.9 and gcc-5.1 compilers when merging cilk into mainline. In particular, the flags -mfpmath=387 and -fcilkplus can't be used together. As -mfpmath=sse is not an option on 32-bit, this renders cilk essentially useless on non-64-bit Intel architectures for floating point.