RFA: hardware can have ISA attributes, too

[Jim Blandy <jimb@redhat.com>]

I don't really feel like I understand CGEN's data model well enough to
know whether this is really appropriate, or just a kludge.

Here's the motivation.  We have a toolchain that supports several
different machines within a family; some register sets are present on
some machines, but not on others.  Given an ISA, we want to be able to
traverse the hardware list and see which register sets are available
on that ISA.

So along with this will come another patch that produces an extern
declaration for @arch@_cgen_hw_table, so we can traverse it.

What's the best way to do this?

2003-07-22  Jim Blandy  <jimb@redhat.com>

	* mach.scm (def-isa-attr!): hardware can have ISA attributes, too.

Index: cgen/mach.scm
===================================================================
RCS file: /cvs/cvsfiles/devo/cgen/mach.scm,v
retrieving revision 1.47.34.1
diff -c -r1.47.34.1 mach.scm
*** cgen/mach.scm	5 Jun 2002 22:18:35 -0000	1.47.34.1
--- cgen/mach.scm	22 Jul 2003 16:47:16 -0000
***************
*** 501,507 ****
        ; for it.
        (if (= (length isas) 1)
  	  '(for)
! 	  '(for ifield operand insn))
        (cons 'values isa-enums))
      )
  
--- 501,507 ----
        ; for it.
        (if (= (length isas) 1)
  	  '(for)
! 	  '(for ifield operand insn hardware))
        (cons 'values isa-enums))
      )