Alpha Options (Using as) (original) (raw)

This option specifies the target processor. If an attempt is made to assemble an instruction which will not execute on the target processor, the assembler may either expand the instruction as a macro or issue an error message. This option is equivalent to the .arch directive.

The following processor names are recognized:21064,21064a,21066,21068,21164,21164a,21164pc,21264,21264a,21264b,ev4,ev5,lca45,ev5,ev56,pca56,ev6,ev67,ev68. The special name all may be used to allow the assembler to accept instructions valid for any Alpha processor.

In order to support existing practice in OSF/1 with respect to .arch, and existing practice within MILO (the Linux ARC bootloader), the numbered processor names (e.g. 21064) enable the processor-specific PALcode instructions, while the “electro-vlasic” names (e.g. ev4) do not.