https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61249
--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> --- I am assuming the PR is about this difference: $ grep frczss doc/extend.texi config/i386/i386.c doc/extend.texi:v4sf __builtin_ia32_vfrczss (v4sf, v4sf) config/i386/i386.c: { OPTION_MASK_ISA_XOP, CODE_FOR_xop_vmfrczv4sf2, "__builtin_ia32_vfrczss", IX86_BUILTIN_VFRCZSS, UNKNOWN, (int)MULTI_ARG_1_SF }, where extend.texi should say; v4sf __builtin_ia32_vfrczss (v4sf) (or we could just not document those since users shouldn't use them)