https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113652
Peter Bergner <bergner at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |ASSIGNED --- Comment #22 from Peter Bergner <bergner at gcc dot gnu.org> --- I kicked off a 7450 build on one of our BE system and I can confirm we hit this error. I also saw us generating the 2 operand form of the mfcr instruction which also leads to an assembler error because the 7450 doesn't support that either. Were we are in the build is compiling libgcc and the routines for handling KFmode values. The build machinery is explicitly adding -mvsx -mfloat128 to the compiler options when building those source files and that seems bogus to me, since the 7450 does not have VSX hardware. It's the explicit addition of the -mvsx option to the command line that is causing the lfiwzx and 2 operand mfcr instructions to be generated, not some internal mishandling of the -mcpu=7450 option. My $0.02 worth is we should be generating an error when trying to use -msx with -mcpu=7450 or any other cpu that doesn't have VSX hardware. I also don't think we should be building these KFmode files which require VSX when the underlying cpu we're targeting doesn't support it.