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View of /sml/trunk/src/MLRISC/ppc/emit/ppcAsm.sml

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Revision 1003 - (download) (annotate)
Fri Dec 7 02:45:32 2001 UTC (18 years, 1 month ago) by george
File size: 17791 byte(s)
Changed the representation of instructions from being fully abstract
to being partially concrete. That is to say:

  from
	type instruction

  to
	type instr				(* machine instruction *)

	datatype instruction =
	    LIVE of {regs: C.cellset, spilled: C.cellset}
          | KILL of {regs: C.cellset, spilled: C.cellset}
          | COPYXXX of {k: CB.cellkind, dst: CB.cell list, src: CB.cell list}
          | ANNOTATION of {i: instruction, a: Annotations.annotation}
          | INSTR of instr

This makes the handling of certain special instructions that appear on
all architectures easier and uniform.

LIVE and KILL say that a list of registers are live or killed at the
program point where they appear. No spill code is generated when an
element of the 'regs' field is spilled, but the register is moved to
the 'spilled' (which is present, more for debugging than anything else).

LIVE replaces the (now deprecated) DEFFREG instruction on the alpha.
We used to generate:

	DEFFREG f1
	f1 := f2 + f3
        trapb

but now generate:

	f1 := f2 + f3
	trapb
	LIVE {regs=[f1,f2,f3], spilled=[]}

Furthermore, the DEFFREG (hack) required that all floating point instruction
use all registers mentioned in the instruction. Therefore f1 := f2 + f3,
defines f1 and uses [f1,f2,f3]! This hack is no longer required resulting
in a cleaner alpha implementation. (Hopefully, intel will not get rid of
this architecture).

COPYXXX is intended to replace the parallel COPY and FCOPY  available on
all the architectures. This will result in further simplification of the
register allocator that must be aware of them for coalescing purposes, and
will also simplify certain aspects of the machine description that provides
callbacks related to parallel copies.

ANNOTATION should be obvious, and now INSTR represents the honest to God
machine instruction set!

The <arch>/instructions/<arch>Instr.sml files define certain utility
functions for making porting easier -- essentially converting upper case
to lower case. All machine instructions (of type instr) are in upper case,
and the lower case form generates an MLRISC instruction. For example on
the alpha we have:

  datatype instr =
     LDA of {r:cell, b:cell, d:operand}
   | ...

  val lda : {r:cell, b:cell, d:operand} -> instruction
    ...

where lda is just (INSTR o LDA), etc.
(*
 * WARNING: This file was automatically generated by MDLGen (v3.0)
 * from the machine description file "ppc/ppc.mdl".
 * DO NOT EDIT this file directly
 *)


functor PPCAsmEmitter(structure S : INSTRUCTION_STREAM
                      structure Instr : PPCINSTR
                         where T = S.P.T
                      structure Shuffle : PPCSHUFFLE
                         where I = Instr
                      structure MLTreeEval : MLTREE_EVAL
                         where T = Instr.T
                     ) : INSTRUCTION_EMITTER =
struct
   structure I  = Instr
   structure C  = I.C
   structure T  = I.T
   structure S  = S
   structure P  = S.P
   structure Constant = I.Constant
   
   val show_cellset = MLRiscControl.getFlag "asm-show-cellset"
   val show_region  = MLRiscControl.getFlag "asm-show-region"
   val show_cutsTo = MLRiscControl.getFlag "asm-show-cutsto"
   val indent_copies = MLRiscControl.getFlag "asm-indent-copies"
   
   fun error msg = MLRiscErrorMsg.error("PPCAsmEmitter",msg)
   
   fun makeStream formatAnnotations =
   let val stream = !AsmStream.asmOutStream
       fun emit' s = TextIO.output(stream,s)
       val newline = ref true
       val tabs = ref 0
       fun tabbing 0 = ()
         | tabbing n = (emit' "\t"; tabbing(n-1))
       fun emit s = (tabbing(!tabs); tabs := 0; newline := false; emit' s)
       fun nl() = (tabs := 0; if !newline then () else (newline := true; emit' "\n"))
       fun comma() = emit ","
       fun tab() = tabs := 1
       fun indent() = tabs := 2
       fun ms n = let val s = Int.toString n
                  in  if n<0 then "-"^String.substring(s,1,size s-1)
                      else s
                  end
       fun emit_label lab = emit(P.Client.AsmPseudoOps.lexpToString(T.LABEL lab))
       fun emit_labexp le = emit(P.Client.AsmPseudoOps.lexpToString (T.LABEXP le))
       fun emit_const c = emit(Constant.toString c)
       fun emit_int i = emit(ms i)
       fun paren f = (emit "("; f(); emit ")")
       fun defineLabel lab = emit(P.Client.AsmPseudoOps.defineLabel lab^":\n")
       fun entryLabel lab = defineLabel lab
       fun comment msg = (tab(); emit("/* " ^ msg ^ " */\n"))
       fun annotation a = (comment(Annotations.toString a); nl())
       fun getAnnotations() = error "getAnnotations"
       fun doNothing _ = ()
       fun fail _ = raise Fail "AsmEmitter"
       fun emit_region mem = comment(I.Region.toString mem)
       val emit_region = 
          if !show_region then emit_region else doNothing
       fun pseudoOp pOp = (emit(P.toString pOp); emit "\n")
       fun init size = (comment("Code Size = " ^ ms size); nl())
       val emitCellInfo = AsmFormatUtil.reginfo
                                (emit,formatAnnotations)
       fun emitCell r = (emit(CellsBasis.toString r); emitCellInfo r)
       fun emit_cellset(title,cellset) =
         (nl(); comment(title^CellsBasis.CellSet.toString cellset))
       val emit_cellset = 
         if !show_cellset then emit_cellset else doNothing
       fun emit_defs cellset = emit_cellset("defs: ",cellset)
       fun emit_uses cellset = emit_cellset("uses: ",cellset)
       val emit_cutsTo = 
         if !show_cutsTo then AsmFormatUtil.emit_cutsTo emit
         else doNothing
       fun emitter instr =
       let
   fun asm_spr (I.XER) = "xer"
     | asm_spr (I.LR) = "lr"
     | asm_spr (I.CTR) = "ctr"
   and emit_spr x = emit (asm_spr x)
   and emit_operand (I.RegOp GP) = emitCell GP
     | emit_operand (I.ImmedOp int) = emit_int int
     | emit_operand (I.LabelOp labexp) = emit_labexp labexp
   and asm_load (I.LBZ) = "lbz"
     | asm_load (I.LBZE) = "lbze"
     | asm_load (I.LHZ) = "lhz"
     | asm_load (I.LHZE) = "lhze"
     | asm_load (I.LHA) = "lha"
     | asm_load (I.LHAE) = "lhae"
     | asm_load (I.LWZ) = "lwz"
     | asm_load (I.LWZE) = "lwze"
     | asm_load (I.LDE) = "lde"
   and emit_load x = emit (asm_load x)
   and asm_store (I.STB) = "stb"
     | asm_store (I.STBE) = "stbe"
     | asm_store (I.STH) = "sth"
     | asm_store (I.STHE) = "sthe"
     | asm_store (I.STW) = "stw"
     | asm_store (I.STWE) = "stwe"
     | asm_store (I.STDE) = "stde"
   and emit_store x = emit (asm_store x)
   and asm_fload (I.LFS) = "lfs"
     | asm_fload (I.LFSE) = "lfse"
     | asm_fload (I.LFD) = "lfd"
     | asm_fload (I.LFDE) = "lfde"
   and emit_fload x = emit (asm_fload x)
   and asm_fstore (I.STFS) = "stfs"
     | asm_fstore (I.STFSE) = "stfse"
     | asm_fstore (I.STFD) = "stfd"
     | asm_fstore (I.STFDE) = "stfde"
   and emit_fstore x = emit (asm_fstore x)
   and asm_cmp (I.CMP) = "cmp"
     | asm_cmp (I.CMPL) = "cmpl"
   and emit_cmp x = emit (asm_cmp x)
   and asm_fcmp (I.FCMPO) = "fcmpo"
     | asm_fcmp (I.FCMPU) = "fcmpu"
   and emit_fcmp x = emit (asm_fcmp x)
   and asm_unary (I.NEG) = "neg"
     | asm_unary (I.EXTSB) = "extsb"
     | asm_unary (I.EXTSH) = "extsh"
     | asm_unary (I.EXTSW) = "extsw"
     | asm_unary (I.CNTLZW) = "cntlzw"
     | asm_unary (I.CNTLZD) = "cntlzd"
   and emit_unary x = emit (asm_unary x)
   and asm_funary (I.FMR) = "fmr"
     | asm_funary (I.FNEG) = "fneg"
     | asm_funary (I.FABS) = "fabs"
     | asm_funary (I.FNABS) = "fnabs"
     | asm_funary (I.FSQRT) = "fsqrt"
     | asm_funary (I.FSQRTS) = "fsqrts"
     | asm_funary (I.FRSP) = "frsp"
     | asm_funary (I.FCTIW) = "fctiw"
     | asm_funary (I.FCTIWZ) = "fctiwz"
     | asm_funary (I.FCTID) = "fctid"
     | asm_funary (I.FCTIDZ) = "fctidz"
     | asm_funary (I.FCFID) = "fcfid"
   and emit_funary x = emit (asm_funary x)
   and asm_farith (I.FADD) = "fadd"
     | asm_farith (I.FSUB) = "fsub"
     | asm_farith (I.FMUL) = "fmul"
     | asm_farith (I.FDIV) = "fdiv"
     | asm_farith (I.FADDS) = "fadds"
     | asm_farith (I.FSUBS) = "fsubs"
     | asm_farith (I.FMULS) = "fmuls"
     | asm_farith (I.FDIVS) = "fdivs"
   and emit_farith x = emit (asm_farith x)
   and asm_farith3 (I.FMADD) = "fmadd"
     | asm_farith3 (I.FMADDS) = "fmadds"
     | asm_farith3 (I.FMSUB) = "fmsub"
     | asm_farith3 (I.FMSUBS) = "fmsubs"
     | asm_farith3 (I.FNMADD) = "fnmadd"
     | asm_farith3 (I.FNMADDS) = "fnmadds"
     | asm_farith3 (I.FNMSUB) = "fnmsub"
     | asm_farith3 (I.FNMSUBS) = "fnmsubs"
     | asm_farith3 (I.FSEL) = "fsel"
   and emit_farith3 x = emit (asm_farith3 x)
   and asm_arith (I.ADD) = "add"
     | asm_arith (I.SUBF) = "subf"
     | asm_arith (I.MULLW) = "mullw"
     | asm_arith (I.MULLD) = "mulld"
     | asm_arith (I.MULHW) = "mulhw"
     | asm_arith (I.MULHWU) = "mulhwu"
     | asm_arith (I.DIVW) = "divw"
     | asm_arith (I.DIVD) = "divd"
     | asm_arith (I.DIVWU) = "divwu"
     | asm_arith (I.DIVDU) = "divdu"
     | asm_arith (I.AND) = "and"
     | asm_arith (I.OR) = "or"
     | asm_arith (I.XOR) = "xor"
     | asm_arith (I.NAND) = "nand"
     | asm_arith (I.NOR) = "nor"
     | asm_arith (I.EQV) = "eqv"
     | asm_arith (I.ANDC) = "andc"
     | asm_arith (I.ORC) = "orc"
     | asm_arith (I.SLW) = "slw"
     | asm_arith (I.SLD) = "sld"
     | asm_arith (I.SRW) = "srw"
     | asm_arith (I.SRD) = "srd"
     | asm_arith (I.SRAW) = "sraw"
     | asm_arith (I.SRAD) = "srad"
   and emit_arith x = emit (asm_arith x)
   and asm_arithi (I.ADDI) = "addi"
     | asm_arithi (I.ADDIS) = "addis"
     | asm_arithi (I.SUBFIC) = "subfic"
     | asm_arithi (I.MULLI) = "mulli"
     | asm_arithi (I.ANDI_Rc) = "andi."
     | asm_arithi (I.ANDIS_Rc) = "andis."
     | asm_arithi (I.ORI) = "ori"
     | asm_arithi (I.ORIS) = "oris"
     | asm_arithi (I.XORI) = "xori"
     | asm_arithi (I.XORIS) = "xoris"
     | asm_arithi (I.SRAWI) = "srawi"
     | asm_arithi (I.SRADI) = "sradi"
   and emit_arithi x = emit (asm_arithi x)
   and asm_rotate (I.RLWNM) = "rlwnm"
     | asm_rotate (I.RLDCL) = "rldcl"
     | asm_rotate (I.RLDCR) = "rldcr"
   and emit_rotate x = emit (asm_rotate x)
   and asm_rotatei (I.RLWINM) = "rlwinm"
     | asm_rotatei (I.RLWIMI) = "rlwimi"
     | asm_rotatei (I.RLDICL) = "rldicl"
     | asm_rotatei (I.RLDICR) = "rldicr"
     | asm_rotatei (I.RLDIC) = "rldic"
     | asm_rotatei (I.RLDIMI) = "rldimi"
   and emit_rotatei x = emit (asm_rotatei x)
   and asm_ccarith (I.CRAND) = "crand"
     | asm_ccarith (I.CROR) = "cror"
     | asm_ccarith (I.CRXOR) = "crxor"
     | asm_ccarith (I.CRNAND) = "crnand"
     | asm_ccarith (I.CRNOR) = "crnor"
     | asm_ccarith (I.CREQV) = "creqv"
     | asm_ccarith (I.CRANDC) = "crandc"
     | asm_ccarith (I.CRORC) = "crorc"
   and emit_ccarith x = emit (asm_ccarith x)
   and asm_bit (I.LT) = "lt"
     | asm_bit (I.GT) = "gt"
     | asm_bit (I.EQ) = "eq"
     | asm_bit (I.SO) = "so"
     | asm_bit (I.FL) = "lt"
     | asm_bit (I.FG) = "gt"
     | asm_bit (I.FE) = "eq"
     | asm_bit (I.FU) = "un"
     | asm_bit (I.FX) = "lt"
     | asm_bit (I.FEX) = "gt"
     | asm_bit (I.VX) = "eq"
     | asm_bit (I.OX) = "so"
   and emit_bit x = emit (asm_bit x)

(*#line 570.7 "ppc/ppc.mdl"*)
   fun emitx (s, I.RegOp _) = (if ((String.sub (s, (size s) - 1)) = #"e")
          then 
          ( emit (String.substring (s, 0, (size s) - 1)); 
            emit "xe" )
          else 
          ( emit s; 
            emit "x" ))
     | emitx (s, _) = emit s

(*#line 576.7 "ppc/ppc.mdl"*)
   fun eOERc {OE=false, Rc=false} = ()
     | eOERc {OE=false, Rc=true} = emit "."
     | eOERc {OE=true, Rc=false} = emit "o"
     | eOERc {OE=true, Rc=true} = emit "o."

(*#line 580.7 "ppc/ppc.mdl"*)
   fun eRc false = ""
     | eRc true = "."

(*#line 581.7 "ppc/ppc.mdl"*)
   fun cr_bit (cr, bit) = (4 * (CellsBasis.physicalRegisterNum cr)) + 
       (case bit of
         I.LT => 0
       | I.GT => 1
       | I.EQ => 2
       | I.SO => 3
       | I.FL => 0
       | I.FG => 1
       | I.FE => 2
       | I.FU => 3
       | I.FX => 0
       | I.FEX => 1
       | I.VX => 2
       | I.OX => 3
       )

(*#line 588.7 "ppc/ppc.mdl"*)
   fun eCRbit x = emit (Int.toString (cr_bit x))

(*#line 589.7 "ppc/ppc.mdl"*)
   fun eLK true = emit "l"
     | eLK false = ()

(*#line 590.7 "ppc/ppc.mdl"*)
   fun eI (I.RegOp _) = ()
     | eI _ = emit "i"

(*#line 591.7 "ppc/ppc.mdl"*)
   fun eBI (bo, bf, bit) = 
       (case (bo, CellsBasis.physicalRegisterNum bf) of
         (I.ALWAYS, _) => ()
       | (I.COUNTER{cond=NONE, ...}, _) => ()
       | (_, 0) => emit (asm_bit bit)
       | (_, n) => emit ((("4*cr" ^ (Int.toString n)) ^ "+") ^ (asm_bit bit))
       )

(*#line 597.7 "ppc/ppc.mdl"*)
   fun emit_bo bo = emit 
       (case bo of
         I.TRUE => "t"
       | I.FALSE => "f"
       | I.ALWAYS => ""
       | I.COUNTER{eqZero, cond=NONE} => (if eqZero
            then "dz"
            else "dnz")
       | I.COUNTER{eqZero, cond=SOME cc} => (if eqZero
            then "dz"
            else "dnz") ^ (if cc
            then "t"
            else "f")
       )

(*#line 608.7 "ppc/ppc.mdl"*)
   fun eME (SOME me) = 
       ( emit ", "; 
         emit_int me )
     | eME NONE = ()

(*#line 611.7 "ppc/ppc.mdl"*)
   fun addr (ra, I.RegOp rb) = 
       ( emitCell ra; 
         emit ", "; 
         emitCell rb )
     | addr (ra, d) = 
       ( emit_operand d; 
         emit "("; 
         emitCell ra; 
         emit ")" )
   fun emitInstr' instr = 
       (case instr of
         I.L{ld, rt, ra, d, mem} => 
         ( emitx (asm_load ld, d); 
           emit "\t"; 
           emitCell rt; 
           emit ", "; 
           addr (ra, d); 
           emit_region mem )
       | I.LF{ld, ft, ra, d, mem} => 
         ( emitx (asm_fload ld, d); 
           emit "\t"; 
           emitCell ft; 
           emit ", "; 
           addr (ra, d); 
           emit_region mem )
       | I.ST{st, rs, ra, d, mem} => 
         ( emitx (asm_store st, d); 
           emit "\t"; 
           emitCell rs; 
           emit ", "; 
           addr (ra, d); 
           emit_region mem )
       | I.STF{st, fs, ra, d, mem} => 
         ( emitx (asm_fstore st, d); 
           emit "\t"; 
           emitCell fs; 
           emit ", "; 
           addr (ra, d); 
           emit_region mem )
       | I.UNARY{oper, rt, ra, Rc, OE} => 
         ( emit_unary oper; 
           eOERc {Rc=Rc, OE=OE}; 
           emit "\t"; 
           emitCell rt; 
           emit ", "; 
           emitCell ra )
       | I.ARITH{oper, rt, ra, rb, Rc, OE} => 
         ( emit_arith oper; 
           eOERc {Rc=Rc, OE=OE}; 
           emit "\t"; 
           emitCell rt; 
           emit ", "; 
           emitCell ra; 
           emit ", "; 
           emitCell rb )
       | I.ARITHI{oper, rt, ra, im} => 
         ( emit_arithi oper; 
           emit "\t"; 
           emitCell rt; 
           emit ", "; 
           emitCell ra; 
           emit ", "; 
           emit_operand im )
       | I.ROTATE{oper, ra, rs, sh, mb, me} => 
         ( emit_rotate oper; 
           emit "\t"; 
           emitCell ra; 
           emit ", "; 
           emitCell rs; 
           emit ", "; 
           emitCell sh; 
           emit ", "; 
           emit_int mb; 
           eME me )
       | I.ROTATEI{oper, ra, rs, sh, mb, me} => 
         ( emit_rotatei oper; 
           emit "\t"; 
           emitCell ra; 
           emit ", "; 
           emitCell rs; 
           emit ", "; 
           emit_operand sh; 
           emit ", "; 
           emit_int mb; 
           eME me )
       | I.COMPARE{cmp, l, bf, ra, rb} => 
         ( emit_cmp cmp; 
           eI rb; 
           emit "\t"; 
           emitCell bf; 
           emit ", "; 
           emit (if l
              then "1"
              else "0"); 
           emit ", "; 
           emitCell ra; 
           emit ", "; 
           emit_operand rb )
       | I.FCOMPARE{cmp, bf, fa, fb} => 
         ( emit_fcmp cmp; 
           emit "\t"; 
           emitCell bf; 
           emit ", "; 
           emitCell fa; 
           emit ", "; 
           emitCell fb )
       | I.FUNARY{oper, ft, fb, Rc} => 
         ( emit_funary oper; 
           eRc Rc; 
           emit "\t"; 
           emitCell ft; 
           emit ", "; 
           emitCell fb )
       | I.FARITH{oper, ft, fa, fb, Rc} => 
         ( emit_farith oper; 
           eRc Rc; 
           emit "\t"; 
           emitCell ft; 
           emit ", "; 
           emitCell fa; 
           emit ", "; 
           emitCell fb )
       | I.FARITH3{oper, ft, fa, fb, fc, Rc} => 
         ( emit_farith3 oper; 
           eRc Rc; 
           emit "\t"; 
           emitCell ft; 
           emit ", "; 
           emitCell fa; 
           emit ", "; 
           emitCell fb; 
           emit ", "; 
           emitCell fc )
       | I.CCARITH{oper, bt, ba, bb} => 
         ( emit_ccarith oper; 
           emit "\t"; 
           eCRbit bt; 
           emit ", "; 
           eCRbit ba; 
           emit ", "; 
           eCRbit bb )
       | I.MCRF{bf, bfa} => 
         ( emit "mcrf\t"; 
           emitCell bf; 
           emit ", "; 
           emitCell bfa )
       | I.MTSPR{rs, spr} => 
         ( emit "mt"; 
           emitCell spr; 
           emit "\t"; 
           emitCell rs )
       | I.MFSPR{rt, spr} => 
         ( emit "mf"; 
           emitCell spr; 
           emit "\t"; 
           emitCell rt )
       | I.TW{to, ra, si} => 
         ( emit "tw"; 
           eI si; 
           emit "\t"; 
           emit_int to; 
           emit ", "; 
           emitCell ra; 
           emit ", "; 
           emit_operand si )
       | I.TD{to, ra, si} => 
         ( emit "td"; 
           eI si; 
           emit "\t"; 
           emit_int to; 
           emit ", "; 
           emitCell ra; 
           emit ", "; 
           emit_operand si )
       | I.BC{bo, bf, bit, addr, LK, fall} => 
         ( emit "b"; 
           emit_bo bo; 
           eLK LK; 
           emit "\t"; 
           eBI (bo, bf, bit); 
           emit ", "; 
           emit_operand addr )
       | I.BCLR{bo, bf, bit, LK, labels} => 
         ( emit "b"; 
           emit_bo bo; 
           emit "lr"; 
           eLK LK; 
           emit "\t"; 
           eBI (bo, bf, bit))
       | I.B{addr, LK} => 
         ( emit "b"; 
           eLK LK; 
           emit "\t"; 
           emit_operand addr )
       | I.CALL{def, use, cutsTo, mem} => 
         ( emit "blrl"; 
           emit_region mem; 
           emit_defs def; 
           emit_uses use; 
           emit_cutsTo cutsTo )
       | I.COPY{dst, src, impl, tmp} => emitInstrs (Shuffle.shuffle {tmp=tmp, 
            dst=dst, src=src})
       | I.FCOPY{dst, src, impl, tmp} => emitInstrs (Shuffle.shufflefp {tmp=tmp, 
            dst=dst, src=src})
       | I.SOURCE{} => emit "source"
       | I.SINK{} => emit "sink"
       | I.PHI{} => emit "phi"
       )
      in  tab(); emitInstr' instr; nl()
      end (* emitter *)
      and emitInstrIndented i = (indent(); emitInstr i; nl())
      and emitInstrs instrs =
           app (if !indent_copies then emitInstrIndented
                else emitInstr) instrs
   
      and emitInstr(I.ANNOTATION{i,a}) =
           ( comment(Annotations.toString a);
              nl();
              emitInstr i )
        | emitInstr(I.LIVE{regs, spilled})  = 
            comment("live= " ^ CellsBasis.CellSet.toString regs ^
                    "spilled= " ^ CellsBasis.CellSet.toString spilled)
        | emitInstr(I.KILL{regs, spilled})  = 
            comment("killed:: " ^ CellsBasis.CellSet.toString regs ^
                    "spilled:: " ^ CellsBasis.CellSet.toString spilled)
        | emitInstr(I.INSTR i) = emitter i
        | emitInstr _ = error "emitInstr"
   
   in  S.STREAM{beginCluster=init,
                pseudoOp=pseudoOp,
                emit=emitInstr,
                endCluster=fail,
                defineLabel=defineLabel,
                entryLabel=entryLabel,
                comment=comment,
                exitBlock=doNothing,
                annotation=annotation,
                getAnnotations=getAnnotations
               }
   end
end


root@smlnj-gforge.cs.uchicago.edu
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