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[smlnj] View of /sml/trunk/src/compiler/CodeGen/ppc/ppcPseudoInstr.sml
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View of /sml/trunk/src/compiler/CodeGen/ppc/ppcPseudoInstr.sml

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Revision 744 - (download) (annotate)
Fri Dec 8 04:11:42 2000 UTC (19 years, 8 months ago) by leunga
File size: 964 byte(s)

   A CVS update record!

   Changed type cell from int to datatype, and numerous other changes.
   Affect every client of MLRISC.  Lal says this can be bootstrapped on all
   machines.  See smlnj/HISTORY for details.

   Tag:  leunga-20001207-cell-monster-hack
functor PPCPseudoInstr
  (structure Instr : PPCINSTR
     where Region = CPSRegions) : PPC_PSEUDO_INSTR = 
  structure I = Instr
  structure C = Instr.C

  val stack = CPSRegions.stack
  val cvti2dTmpOff = 16			(* runtime system dependent *)
  val cvti2dConstOff = 8		(*            ''             *)
  val sp = C.stackptrR

  (* Cute little trick -- go figure *)
  fun cvti2d{reg, fd} = let
    val tmpR = C.newReg()
    val tmpF = C.newFreg()
    [I.ARITHI{oper=I.XORIS, rt=tmpR, ra=reg, im=I.ImmedOp 32768},
     I.ST{st=I.STW, rs=tmpR, ra=sp, d=I.ImmedOp(cvti2dTmpOff+4), mem=stack},
     I.ARITHI{oper=I.ADDIS, rt=tmpR, ra=C.r0, im=I.ImmedOp(0x4330)},
     I.ST{st=I.STW, rs=tmpR, ra=sp, d=I.ImmedOp(cvti2dTmpOff), mem=stack},
     I.LF{ld=I.LFD, ft=fd, ra=sp, d=I.ImmedOp(cvti2dTmpOff), mem=stack},
     I.LF{ld=I.LFD, ft=tmpF, ra=sp, d=I.ImmedOp(cvti2dConstOff), mem=stack},
     I.FARITH{oper=I.FSUB, ft=fd, fa=fd, fb=tmpF, Rc=false}]

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