https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93570
Bug ID: 93570 Summary: PPC: __builtin_mtfsf does not return a value Product: gcc Version: 8.3.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: jens.seifert at de dot ibm.com Target Milestone: --- Documentation says: double __builtin_mtfsf(const int,double) Not documented in 8.3.0, but somehow works, nevertheless looks like the prototype is wrong and should be void __builtin_mtfsf(const int,double) double mtfsf(double x) { return __builtin_mtfsf(0xFF,x); } returns flm.C:9:34: error: void value not ignored as it ought to be return __builtin_mtfsf(0xFF, x); Is __builtin_mtfsf returning void ? Is it safe to use __builtin_mtfsf with 8.3.0 ?