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llvm-6502/lib/Target/PIC16/PIC16InstrInfo.td

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//===- PIC16InstrInfo.td - PIC16 Instruction defs -------------*- tblgen-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file describes the PIC16 instructions in TableGen format.
//
//===----------------------------------------------------------------------===//
//===----------------------------------------------------------------------===//
// PIC16 Specific Type Constraints.
//===----------------------------------------------------------------------===//
class SDTCisI8<int OpNum> : SDTCisVT<OpNum, i8>;
class SDTCisI16<int OpNum> : SDTCisVT<OpNum, i16>;
//===----------------------------------------------------------------------===//
// PIC16 Specific Type Profiles.
//===----------------------------------------------------------------------===//
// Generic type profiles for i8/i16 unary/binary operations.
// Taking one i8 or i16 and producing void.
def SDTI8VoidOp : SDTypeProfile<0, 1, [SDTCisI8<0>]>;
def SDTI16VoidOp : SDTypeProfile<0, 1, [SDTCisI16<0>]>;
// Taking one value and producing an output of same type.
def SDTI8UnaryOp : SDTypeProfile<1, 1, [SDTCisI8<0>, SDTCisI8<1>]>;
def SDTI16UnaryOp : SDTypeProfile<1, 1, [SDTCisI16<0>, SDTCisI16<1>]>;
// Taking two values and producing an output of same type.
def SDTI8BinOp : SDTypeProfile<1, 2, [SDTCisI8<0>, SDTCisI8<1>, SDTCisI8<2>]>;
def SDTI16BinOp : SDTypeProfile<1, 2, [SDTCisI16<0>, SDTCisI16<1>,
SDTCisI16<2>]>;
// Node specific type profiles.
def SDT_PIC16Load : SDTypeProfile<1, 3, [SDTCisI8<0>, SDTCisI8<1>,
SDTCisI8<2>, SDTCisI8<3>]>;
def SDT_PIC16Store : SDTypeProfile<0, 4, [SDTCisI8<0>, SDTCisI8<1>,
SDTCisI8<2>, SDTCisI8<3>]>;
def SDT_PIC16Connect : SDTypeProfile<1, 2, [SDTCisI8<0>, SDTCisI8<1>,
SDTCisI8<2>]>;
// PIC16ISD::CALL type prorile
def SDT_PIC16call : SDTypeProfile<0, -1, [SDTCisInt<0>]>;
def SDT_PIC16callw : SDTypeProfile<1, -1, [SDTCisInt<0>]>;
// PIC16ISD::BRCOND
def SDT_PIC16Brcond: SDTypeProfile<0, 2,
[SDTCisVT<0, OtherVT>, SDTCisI8<1>]>;
// PIC16ISD::BRCOND
def SDT_PIC16Selecticc: SDTypeProfile<1, 3,
[SDTCisI8<0>, SDTCisI8<1>, SDTCisI8<2>,
SDTCisI8<3>]>;
//===----------------------------------------------------------------------===//
// PIC16 addressing modes matching via DAG.
//===----------------------------------------------------------------------===//
def diraddr : ComplexPattern<i8, 1, "SelectDirectAddr", [], []>;
//===----------------------------------------------------------------------===//
// PIC16 Specific Node Definitions.
//===----------------------------------------------------------------------===//
def PIC16callseq_start : SDNode<"ISD::CALLSEQ_START", SDTI8VoidOp,
[SDNPHasChain, SDNPOutFlag]>;
def PIC16callseq_end : SDNode<"ISD::CALLSEQ_END", SDTI8VoidOp,
[SDNPHasChain, SDNPOptInFlag, SDNPOutFlag]>;
// Low 8-bits of GlobalAddress.
def PIC16Lo : SDNode<"PIC16ISD::Lo", SDTI8BinOp>;
// High 8-bits of GlobalAddress.
def PIC16Hi : SDNode<"PIC16ISD::Hi", SDTI8BinOp>;
// The MTHI and MTLO nodes are used only to match them in the incoming
// DAG for replacement by corresponding set_fsrhi, set_fsrlo insntructions.
// These nodes are not used for defining any instructions.
def MTLO : SDNode<"PIC16ISD::MTLO", SDTI8UnaryOp>;
def MTHI : SDNode<"PIC16ISD::MTHI", SDTI8UnaryOp>;
def MTPCLATH : SDNode<"PIC16ISD::MTPCLATH", SDTI8UnaryOp>;
// Node to generate Bank Select for a GlobalAddress.
def Banksel : SDNode<"PIC16ISD::Banksel", SDTI8UnaryOp>;
// Node to match a direct store operation.
def PIC16Store : SDNode<"PIC16ISD::PIC16Store", SDT_PIC16Store, [SDNPHasChain]>;
def PIC16StWF : SDNode<"PIC16ISD::PIC16StWF", SDT_PIC16Store,
[SDNPHasChain, SDNPInFlag, SDNPOutFlag]>;
// Node to match a direct load operation.
def PIC16Load : SDNode<"PIC16ISD::PIC16Load", SDT_PIC16Load, [SDNPHasChain]>;
def PIC16LdArg : SDNode<"PIC16ISD::PIC16LdArg", SDT_PIC16Load, [SDNPHasChain]>;
def PIC16LdWF : SDNode<"PIC16ISD::PIC16LdWF", SDT_PIC16Load,
[SDNPHasChain, SDNPInFlag, SDNPOutFlag]>;
def PIC16Connect: SDNode<"PIC16ISD::PIC16Connect", SDT_PIC16Connect, []>;
// Node to match PIC16 call
def PIC16call : SDNode<"PIC16ISD::CALL", SDT_PIC16call,
[SDNPHasChain , SDNPOptInFlag, SDNPOutFlag]>;
def PIC16callw : SDNode<"PIC16ISD::CALLW", SDT_PIC16callw,
[SDNPHasChain , SDNPOptInFlag, SDNPOutFlag]>;
// Node to match a comparison instruction.
def PIC16Subcc : SDNode<"PIC16ISD::SUBCC", SDTI8BinOp, [SDNPOutFlag]>;
// Node to match a conditional branch.
def PIC16Brcond : SDNode<"PIC16ISD::BRCOND", SDT_PIC16Brcond,
[SDNPHasChain, SDNPInFlag]>;
def PIC16Selecticc : SDNode<"PIC16ISD::SELECT_ICC", SDT_PIC16Selecticc,
[SDNPInFlag]>;
//===----------------------------------------------------------------------===//
// PIC16 Operand Definitions.
//===----------------------------------------------------------------------===//
def i8mem : Operand<i8>;
def brtarget: Operand<OtherVT>;
// Operand for printing out a condition code.
let PrintMethod = "printCCOperand" in
def CCOp : Operand<i8>;
include "PIC16InstrFormats.td"
//===----------------------------------------------------------------------===//
// PIC16 Common Classes.
//===----------------------------------------------------------------------===//
// W = W Op F : Load the value from F and do Op to W.
let isTwoAddress = 1, mayLoad = 1 in
class BinOpFW<bits<6> OpCode, string OpcStr, SDNode OpNode>:
ByteFormat<OpCode, (outs GPR:$dst),
(ins GPR:$src, i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
!strconcat(OpcStr, " $ptrlo + $offset, W"),
[(set GPR:$dst, (OpNode GPR:$src, (PIC16Load diraddr:$ptrlo,
(i8 imm:$ptrhi),
(i8 imm:$offset))))]>;
// F = F Op W : Load the value from F, do op with W and store in F.
// This insn class is not marked as TwoAddress because the reg is
// being used as a source operand only. (Remember a TwoAddress insn
// needs a copyRegToReg.)
let mayStore = 1 in
class BinOpWF<bits<6> OpCode, string OpcStr, SDNode OpNode>:
ByteFormat<OpCode, (outs),
(ins GPR:$src, i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
!strconcat(OpcStr, " $ptrlo + $offset"),
[(PIC16Store (OpNode GPR:$src, (PIC16Load diraddr:$ptrlo,
(i8 imm:$ptrhi),
(i8 imm:$offset))),
diraddr:$ptrlo,
(i8 imm:$ptrhi), (i8 imm:$offset)
)]>;
// W = W Op L : Do Op of L with W and place result in W.
let isTwoAddress = 1 in
class BinOpLW<bits<6> opcode, string OpcStr, SDNode OpNode> :
LiteralFormat<opcode, (outs GPR:$dst),
(ins GPR:$src, i8imm:$literal),
!strconcat(OpcStr, " $literal"),
[(set GPR:$dst, (OpNode GPR:$src, (i8 imm:$literal)))]>;
//===----------------------------------------------------------------------===//
// PIC16 Instructions.
//===----------------------------------------------------------------------===//
// Pseudo-instructions.
def ADJCALLSTACKDOWN : Pseudo<(outs), (ins i8imm:$amt),
"!ADJCALLSTACKDOWN $amt",
[(PIC16callseq_start imm:$amt)]>;
def ADJCALLSTACKUP : Pseudo<(outs), (ins i8imm:$amt),
"!ADJCALLSTACKUP $amt",
[(PIC16callseq_end imm:$amt)]>;
//-----------------------------------
// Vaious movlw insn patterns.
//-----------------------------------
let isReMaterializable = 1 in {
// Move 8-bit literal to W.
def movlw : BitFormat<12, (outs GPR:$dst), (ins i8imm:$src),
"movlw $src",
[(set GPR:$dst, (i8 imm:$src))]>;
// Move a Lo(TGA) to W.
def movlw_lo_1 : BitFormat<12, (outs GPR:$dst), (ins i8imm:$src, i8imm:$src2),
"movlw LOW(${src} + ${src2})",
[(set GPR:$dst, (PIC16Lo tglobaladdr:$src, imm:$src2 ))]>;
// Move a Lo(TES) to W.
def movlw_lo_2 : BitFormat<12, (outs GPR:$dst), (ins i8imm:$src, i8imm:$src2),
"movlw LOW(${src} + ${src2})",
[(set GPR:$dst, (PIC16Lo texternalsym:$src, imm:$src2 ))]>;
// Move a Hi(TGA) to W.
def movlw_hi_1 : BitFormat<12, (outs GPR:$dst), (ins i8imm:$src, i8imm:$src2),
"movlw HIGH(${src} + ${src2})",
[(set GPR:$dst, (PIC16Hi tglobaladdr:$src, imm:$src2))]>;
// Move a Hi(TES) to W.
def movlw_hi_2 : BitFormat<12, (outs GPR:$dst), (ins i8imm:$src, i8imm:$src2),
"movlw HIGH(${src} + ${src2})",
[(set GPR:$dst, (PIC16Hi texternalsym:$src, imm:$src2))]>;
}
//-------------------
// FSR setting insns.
//-------------------
// These insns are matched via a DAG replacement pattern.
def set_fsrlo:
ByteFormat<0, (outs FSR16:$fsr),
(ins GPR:$val),
"movwf ${fsr}L",
[]>;
let isTwoAddress = 1 in
def set_fsrhi:
ByteFormat<0, (outs FSR16:$dst),
(ins FSR16:$src, GPR:$val),
"movwf ${dst}H",
[]>;
def set_pclath:
ByteFormat<0, (outs PCLATHR:$dst),
(ins GPR:$val),
"movwf ${dst}",
[(set PCLATHR:$dst , (MTPCLATH GPR:$val))]>;
//----------------------------
// copyRegToReg
// copyRegToReg insns. These are dummy. They should always be deleted
// by the optimizer and never be present in the final generated code.
// if they are, then we have to write correct macros for these insns.
//----------------------------
def copy_fsr:
Pseudo<(outs FSR16:$dst), (ins FSR16:$src), "copy_fsr $dst, $src", []>;
def copy_w:
Pseudo<(outs GPR:$dst), (ins GPR:$src), "copy_w $dst, $src", []>;
class SAVE_FSR<string OpcStr>:
Pseudo<(outs),
(ins FSR16:$src, i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
!strconcat(OpcStr, " $ptrlo, $offset"),
[]>;
def save_fsr0: SAVE_FSR<"save_fsr0">;
def save_fsr1: SAVE_FSR<"save_fsr1">;
class RESTORE_FSR<string OpcStr>:
Pseudo<(outs FSR16:$dst),
(ins i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
!strconcat(OpcStr, " $ptrlo, $offset"),
[]>;
def restore_fsr0: RESTORE_FSR<"restore_fsr0">;
def restore_fsr1: RESTORE_FSR<"restore_fsr1">;
//--------------------------
// Store to memory
//-------------------------
// Direct store.
// Input operands are: val = W, ptrlo = GA, offset = offset, ptrhi = banksel.
let mayStore = 1 in
class MOVWF_INSN<bits<6> OpCode, SDNode OpNodeDest, SDNode Op>:
ByteFormat<0, (outs),
(ins GPR:$val, i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
"movwf ${ptrlo} + ${offset}",
[(Op GPR:$val, OpNodeDest:$ptrlo, (i8 imm:$ptrhi),
(i8 imm:$offset))]>;
// Store W to a Global Address.
def movwf : MOVWF_INSN<0, tglobaladdr, PIC16Store>;
// Store W to an External Symobol.
def movwf_1 : MOVWF_INSN<0, texternalsym, PIC16Store>;
// Store with InFlag and OutFlag
// This is same as movwf_1 but has a flag. A flag is required to
// order the stores while passing the params to function.
def movwf_2 : MOVWF_INSN<0, texternalsym, PIC16StWF>;
// Indirect store. Matched via a DAG replacement pattern.
def store_indirect :
ByteFormat<0, (outs),
(ins GPR:$val, FSR16:$fsr, i8imm:$offset),
"movwi $offset[$fsr]",
[]>;
//----------------------------
// Load from memory
//----------------------------
// Direct load.
// Input Operands are: ptrlo = GA, offset = offset, ptrhi = banksel.
// Output: dst = W
let Defs = [STATUS], mayLoad = 1 in
class MOVF_INSN<bits<6> OpCode, SDNode OpNodeSrc, SDNode Op>:
ByteFormat<0, (outs GPR:$dst),
(ins i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
"movf ${ptrlo} + ${offset}, W",
[(set GPR:$dst,
(Op OpNodeSrc:$ptrlo, (i8 imm:$ptrhi),
(i8 imm:$offset)))]>;
// Load from a GA.
def movf : MOVF_INSN<0, tglobaladdr, PIC16Load>;
// Load from an ES.
def movf_1 : MOVF_INSN<0, texternalsym, PIC16Load>;
def movf_1_1 : MOVF_INSN<0, texternalsym, PIC16LdArg>;
// Load with InFlag and OutFlag
// This is same as movf_1 but has a flag. A flag is required to
// order the loads while copying the return value of a function.
def movf_2 : MOVF_INSN<0, texternalsym, PIC16LdWF>;
// Indirect load. Matched via a DAG replacement pattern.
def load_indirect :
ByteFormat<0, (outs GPR:$dst),
(ins FSR16:$fsr, i8imm:$offset),
"moviw $offset[$fsr]",
[]>;
//-------------------------
// Bitwise operations patterns
//--------------------------
// W = W op [F]
let Defs = [STATUS] in {
def OrFW : BinOpFW<0, "iorwf", or>;
def XOrFW : BinOpFW<0, "xorwf", xor>;
def AndFW : BinOpFW<0, "andwf", and>;
// F = W op [F]
def OrWF : BinOpWF<0, "iorwf", or>;
def XOrWF : BinOpWF<0, "xorwf", xor>;
def AndWF : BinOpWF<0, "andwf", and>;
//-------------------------
// Various add/sub patterns.
//-------------------------
// W = W + [F]
def addfw_1: BinOpFW<0, "addwf", add>;
def addfw_2: BinOpFW<0, "addwf", addc>;
let Uses = [STATUS] in
def addfwc: BinOpFW<0, "addwfc", adde>; // With Carry.
// F = W + [F]
def addwf_1: BinOpWF<0, "addwf", add>;
def addwf_2: BinOpWF<0, "addwf", addc>;
let Uses = [STATUS] in
def addwfc: BinOpWF<0, "addwfc", adde>; // With Carry.
}
// W -= [F] ; load from F and sub the value from W.
let isTwoAddress = 1, mayLoad = 1 in
class SUBFW<bits<6> OpCode, string OpcStr, SDNode OpNode>:
ByteFormat<OpCode, (outs GPR:$dst),
(ins GPR:$src, i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
!strconcat(OpcStr, " $ptrlo + $offset, W"),
[(set GPR:$dst, (OpNode (PIC16Load diraddr:$ptrlo,
(i8 imm:$ptrhi), (i8 imm:$offset)),
GPR:$src))]>;
let Defs = [STATUS] in {
def subfw_1: SUBFW<0, "subwf", sub>;
def subfw_2: SUBFW<0, "subwf", subc>;
let Uses = [STATUS] in
def subfwb: SUBFW<0, "subwfb", sube>; // With Borrow.
}
let Defs = [STATUS], isTerminator = 1 in
def subfw_cc: SUBFW<0, "subwf", PIC16Subcc>;
// [F] -= W ;
let mayStore = 1 in
class SUBWF<bits<6> OpCode, string OpcStr, SDNode OpNode>:
ByteFormat<OpCode, (outs),
(ins GPR:$src, i8imm:$offset, i8mem:$ptrlo, i8imm:$ptrhi),
!strconcat(OpcStr, " $ptrlo + $offset"),
[(PIC16Store (OpNode (PIC16Load diraddr:$ptrlo,
(i8 imm:$ptrhi), (i8 imm:$offset)),
GPR:$src), diraddr:$ptrlo,
(i8 imm:$ptrhi), (i8 imm:$offset))]>;
let Defs = [STATUS] in {
def subwf_1: SUBWF<0, "subwf", sub>;
def subwf_2: SUBWF<0, "subwf", subc>;
let Uses = [STATUS] in
def subwfb: SUBWF<0, "subwfb", sube>; // With Borrow.
def subwf_cc: SUBWF<0, "subwf", PIC16Subcc>;
}
// addlw
let Defs = [STATUS] in {
def addlw_1 : BinOpLW<0, "addlw", add>;
def addlw_2 : BinOpLW<0, "addlw", addc>;
let Uses = [STATUS] in
def addlwc : BinOpLW<0, "addlwc", adde>; // With Carry. (Assembler macro).
// bitwise operations involving a literal and w.
def andlw : BinOpLW<0, "andlw", and>;
def xorlw : BinOpLW<0, "xorlw", xor>;
def orlw : BinOpLW<0, "iorlw", or>;
}
// sublw
// W = C - W ; sub W from literal. (Without borrow).
let isTwoAddress = 1 in
class SUBLW<bits<6> opcode, SDNode OpNode> :
LiteralFormat<opcode, (outs GPR:$dst),
(ins GPR:$src, i8imm:$literal),
"sublw $literal",
[(set GPR:$dst, (OpNode (i8 imm:$literal), GPR:$src))]>;
let Defs = [STATUS] in {
def sublw_1 : SUBLW<0, sub>;
def sublw_2 : SUBLW<0, subc>;
}
let Defs = [STATUS], isTerminator = 1 in
def sublw_cc : SUBLW<0, PIC16Subcc>;
// Call instruction.
let isCall = 1,
Defs = [W, FSR0, FSR1] in {
def CALL: LiteralFormat<0x1, (outs), (ins i8imm:$func),
//"call ${func} + 2",
"call ${func}",
[(PIC16call diraddr:$func)]>;
}
let isCall = 1,
Defs = [W, FSR0, FSR1] in {
def CALL_1: LiteralFormat<0x1, (outs), (ins GPR:$func, PCLATHR:$pc),
"callw",
[(PIC16call (PIC16Connect GPR:$func, PCLATHR:$pc))]>;
}
let isCall = 1,
Defs = [FSR0, FSR1] in {
def CALLW: LiteralFormat<0x1, (outs GPR:$dest),
(ins GPR:$func, PCLATHR:$pc),
"callw",
[(set GPR:$dest, (PIC16callw (PIC16Connect GPR:$func, PCLATHR:$pc)))]>;
}
let Uses = [STATUS], isBranch = 1, isTerminator = 1, hasDelaySlot = 0 in
def pic16brcond: ControlFormat<0x0, (outs), (ins brtarget:$dst, CCOp:$cc),
"b$cc $dst",
[(PIC16Brcond bb:$dst, imm:$cc)]>;
// Unconditional branch.
let isBranch = 1, isTerminator = 1, hasDelaySlot = 0 in
def br_uncond: ControlFormat<0x0, (outs), (ins brtarget:$dst),
"goto $dst",
[(br bb:$dst)]>;
// SELECT_CC_* - Used to implement the SELECT_CC DAG operation. Expanded by the
// scheduler into a branch sequence.
let usesCustomDAGSchedInserter = 1 in { // Expanded by the scheduler.
def SELECT_CC_Int_ICC
: Pseudo<(outs GPR:$dst), (ins GPR:$T, GPR:$F, i8imm:$Cond),
"; SELECT_CC_Int_ICC PSEUDO!",
[(set GPR:$dst, (PIC16Selecticc GPR:$T, GPR:$F,
imm:$Cond))]>;
}
// Banksel.
def banksel :
Pseudo<(outs),
(ins i8mem:$ptr),
"banksel $ptr",
[]>;
def pagesel :
Pseudo<(outs),
(ins i8mem:$ptr),
"movlp $ptr",
[]>;
// Return insn.
let isTerminator = 1, isBarrier = 1, isReturn = 1 in
def Return :
ControlFormat<0, (outs), (ins), "return", [(ret)]>;
//===----------------------------------------------------------------------===//
// PIC16 Replacment Patterns.
//===----------------------------------------------------------------------===//
// Identify an indirect store and select insns for it.
def : Pat<(PIC16Store GPR:$val, (MTLO GPR:$loaddr), (MTHI GPR:$hiaddr),
imm:$offset),
(store_indirect GPR:$val,
(set_fsrhi (set_fsrlo GPR:$loaddr), GPR:$hiaddr),
imm:$offset)>;
def : Pat<(PIC16StWF GPR:$val, (MTLO GPR:$loaddr), (MTHI GPR:$hiaddr),
imm:$offset),
(store_indirect GPR:$val,
(set_fsrhi (set_fsrlo GPR:$loaddr), GPR:$hiaddr),
imm:$offset)>;
// Identify an indirect load and select insns for it.
def : Pat<(PIC16Load (MTLO GPR:$loaddr), (MTHI GPR:$hiaddr),
imm:$offset),
(load_indirect (set_fsrhi (set_fsrlo GPR:$loaddr), GPR:$hiaddr),
imm:$offset)>;
def : Pat<(PIC16LdWF (MTLO GPR:$loaddr), (MTHI GPR:$hiaddr),
imm:$offset),
(load_indirect (set_fsrhi (set_fsrlo GPR:$loaddr), GPR:$hiaddr),
imm:$offset)>;
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