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[smlnj] View of /sml/trunk/src/MLRISC/ppc/instructions/ppcFreqProps.sml
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View of /sml/trunk/src/MLRISC/ppc/instructions/ppcFreqProps.sml

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Revision 651 - (download) (annotate)
Thu Jun 1 18:34:03 2000 UTC (19 years, 4 months ago) by monnier
File size: 677 byte(s)
bring revisions from the vendor branch to the trunk
(*
 * Extract frequency information from the PowerPC architecture
 *
 * -- Allen
 *)

functor PPCFreqProps(PPCInstr : PPCINSTR) : FREQUENCY_PROPERTIES =
struct

   structure I = PPCInstr

   fun branchProb(I.ANNOTATION{a, i, ...}) =
        (case #peek MLRiscAnnotations.BRANCH_PROB a of
           SOME b => b
         | NONE => branchProb i
        )
     | branchProb(I.BC _) = 50
     | branchProb(I.BCLR{labels=[],bo=I.ALWAYS,...}) = 100
     | branchProb(I.BCLR{labels,bo=I.ALWAYS,...}) = 100 div length labels
     | branchProb(I.BCLR{labels=[],bo,...}) = 50
     | branchProb(I.BCLR{labels,bo,...}) = 100 div length labels
     | branchProb _ = 0 (* non-branch *)

end

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