[Bug c/37180] New: gcc emits bad opcode 'ffreep'

[ebuddington at wesleyan dot edu]

The vortex86sx claims to be 486-compliant, but it gives "Illegal Instruction"
on ffreep.

GCC uses ffreep when compiling many pieces of software, rendering them unusable
on this processor.

I do not see any way to explicitly blacklist the opcode, and setting -march to
i486, i386, or native does not avoid the problem.

Could this be added as an architecture, or is there an existing solution that
I'm missing?


-- 
           Summary: gcc emits bad opcode 'ffreep'
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ebuddington at wesleyan dot edu
 GCC build triplet: vortex86-pc-linux
  GCC host triplet: vortex86-pc-linux
GCC target triplet: vortex86-pc-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37180