Hi *, I am using GCC-3.3.6 for MIPS and tried to use the instruction "EHB" (Execution Hazard Barrier). However, I get the following error: Assembler messages: Error: opcode not supported on this processor: mips32 (mips32) 'ehb' Does anyone know if this instruction is supported in that version of GCC or any later versions? Moreover, is there any equivalent instructions that can be used instead? Best regards, -- Mohamed A. Bamakhrama Am Schaeferanger 15, room 035 85764 Oberschleissheim, Germany Email: bamakhra@xxxxxxxxxx Web: http://home.cs.tum.edu/~bamakhra/ Mobile: +49-160-9349-2711