llvm-6502/lib/Target/Sparc/SparcInstrInfo.td

//===- SparcV8Instrs.td - Target Description for SparcV8 Target -----------===//
// 
//                     The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
// 
//===----------------------------------------------------------------------===//
//
// This file describes the SparcV8 instructions in TableGen format.
//
//===----------------------------------------------------------------------===//

//===----------------------------------------------------------------------===//
// Instruction format superclass
//===----------------------------------------------------------------------===//

class InstV8 : Instruction {          // SparcV8 instruction baseline
  field bits<32> Inst;

  let Namespace = "V8";

  bits<2> op;
  let Inst{31-30} = op;               // Top two bits are the 'op' field

  // Bit attributes specific to SparcV8 instructions
  bit isPasi       = 0; // Does this instruction affect an alternate addr space?
  bit isPrivileged = 0; // Is this a privileged instruction?
}

include "SparcV8InstrFormats.td"

//===----------------------------------------------------------------------===//
// Instructions
//===----------------------------------------------------------------------===//

// Pseudo instructions.
class PseudoInstV8<string asmstr, dag ops> : InstV8  {
  let AsmString = asmstr;
  dag OperandList = ops;
}
def PHI : PseudoInstV8<"PHI", (ops variable_ops)>;
def ADJCALLSTACKDOWN : PseudoInstV8<"!ADJCALLSTACKDOWN $amt",
                                    (ops i32imm:$amt)>;
def ADJCALLSTACKUP : PseudoInstV8<"!ADJCALLSTACKUP $amt",
                                  (ops i32imm:$amt)>;
//def IMPLICIT_USE : PseudoInstV8<"!IMPLICIT_USE",(ops variable_ops)>;
def IMPLICIT_DEF : PseudoInstV8<"!IMPLICIT_DEF $dst", 
                                (ops IntRegs:$dst)>;
def FpMOVD : PseudoInstV8<"!FpMOVD", (ops)>; // pseudo 64-bit double move

// Section A.3 - Synthetic Instructions, p. 85
// special cases of JMPL:
let isReturn = 1, isTerminator = 1, hasDelaySlot = 1 in {
  let rd = I7.Num, rs1 = G0.Num, simm13 = 8 in
    def RET : F3_2<2, 0b111000,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "ret $b, $c, $dst">;
  let rd = O7.Num, rs1 = G0.Num, simm13 = 8 in
    def RETL: F3_2<2, 0b111000, (ops),
                   "retl">;
}
// CMP is a special case of SUBCC where destination is ignored, by setting it to
// %g0 (hardwired zero).
// FIXME: should keep track of the fact that it defs the integer condition codes
let rd = 0 in
  def CMPri: F3_2<2, 0b010100,
                  (ops IntRegs:$b, i32imm:$c),
                  "cmp $b, $c">;

// Section B.1 - Load Integer Instructions, p. 90
def LDSB: F3_2<3, 0b001001,
               (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
               "ldsb [$b+$c], $dst">;
def LDSH: F3_2<3, 0b001010,
               (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
               "ldsh [$b+$c], $dst">;
def LDUB: F3_2<3, 0b000001,
               (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
               "ldub [$b+$c], $dst">;
def LDUH: F3_2<3, 0b000010,
               (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
               "lduh [$b+$c], $dst">;
def LD  : F3_2<3, 0b000000,
               (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
               "ld [$b+$c], $dst">;
def LDD : F3_2<3, 0b000011,
               (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
               "ldd [$b+$c], $dst">;

// Section B.2 - Load Floating-point Instructions, p. 92
def LDFrr  : F3_1<3, 0b100000,
                  (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                  "ld [$b+$c], $dst">;
def LDFri  : F3_2<3, 0b100000,
                  (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                  "ld [$b+$c], $dst">;
def LDDFrr : F3_1<3, 0b100011,
                  (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                  "ldd [$b+$c], $dst">;
def LDDFri : F3_2<3, 0b100011,
                  (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                  "ldd [$b+$c], $dst">;
def LDFSRrr: F3_1<3, 0b100001,
                  (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                  "ld [$b+$c], $dst">;
def LDFSRri: F3_2<3, 0b100001,
                  (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                  "ld [$b+$c], $dst">;

// Section B.4 - Store Integer Instructions, p. 95
def STB : F3_2<3, 0b000101,
               (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
               "stb $src, [$base+$offset]">;
def STH : F3_2<3, 0b000110,
               (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
               "sth $src, [$base+$offset]">;
def ST  : F3_2<3, 0b000100,
               (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
               "st $src, [$base+$offset]">;
def STD : F3_2<3, 0b000111,
               (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
               "std $src, [$base+$offset]">;

// Section B.5 - Store Floating-point Instructions, p. 97
def STFrr   : F3_1<3, 0b100100,
                   (ops IntRegs:$base, IntRegs:$offset, IntRegs:$src),
                   "st $src, [$base+$offset]">;
def STFri   : F3_2<3, 0b100100,
                   (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
                   "st $src, [$base+$offset]">;
def STDFrr  : F3_1<3, 0b100111,
                   (ops IntRegs:$base, IntRegs:$offset, IntRegs:$src),
                   "std  $src, [$base+$offset]">;
def STDFri  : F3_2<3, 0b100111,
                   (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
                   "std $src, [$base+$offset]">;
def STFSRrr : F3_1<3, 0b100101,
                   (ops IntRegs:$base, IntRegs:$offset, IntRegs:$src),
                   "st $src, [$base+$offset]">;
def STFSRri : F3_2<3, 0b100101,
                   (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
                   "st $src, [$base+$offset]">;
def STDFQrr : F3_1<3, 0b100110,
                   (ops IntRegs:$base, IntRegs:$offset, IntRegs:$src),
                   "std $src, [$base+$offset]">;
def STDFQri : F3_2<3, 0b100110,
                   (ops IntRegs:$base, IntRegs:$offset, i32imm:$src),
                   "std $src, [$base+$offset]">;

// Section B.9 - SETHI Instruction, p. 104
def SETHIi: F2_1<0b100,
                 (ops IntRegs:$dst, i32imm:$src),
                 "sethi $src, $dst">;

// Section B.10 - NOP Instruction, p. 105
// (It's a special case of SETHI)
let rd = 0, imm22 = 0 in
  def NOP : F2_1<0b100, (ops), "nop">;

// Section B.11 - Logical Instructions, p. 106
def ANDrr   : F3_1<2, 0b000001,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "and $b, $c, $dst">;
def ANDri   : F3_2<2, 0b000001,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "and $b, $c, $dst">;
def ANDCCrr : F3_1<2, 0b010001,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "andcc $b, $c, $dst">;
def ANDCCri : F3_2<2, 0b010001,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "andcc $b, $c, $dst">;
def ANDNrr  : F3_1<2, 0b000101,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "andn $b, $c, $dst">;
def ANDNri  : F3_2<2, 0b000101,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "andn $b, $c, $dst">;
def ANDNCCrr: F3_1<2, 0b010101,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "andncc $b, $c, $dst">;
def ANDNCCri: F3_2<2, 0b010101,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "andncc $b, $c, $dst">;
def ORrr    : F3_1<2, 0b000010,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "or $b, $c, $dst">;
def ORri    : F3_2<2, 0b000010,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "or $b, $c, $dst">;
def ORCCrr  : F3_1<2, 0b010010,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "orcc $b, $c, $dst">;
def ORCCri  : F3_2<2, 0b010010,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "orcc $b, $c, $dst">;
def ORNrr   : F3_1<2, 0b000110,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "orn $b, $c, $dst">;
def ORNri   : F3_2<2, 0b000110,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "orn $b, $c, $dst">;
def ORNCCrr : F3_1<2, 0b010110,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "orncc $b, $c, $dst">;
def ORNCCri : F3_2<2, 0b010110,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "orncc $b, $c, $dst">;
def XORrr   : F3_1<2, 0b000011,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "xor $b, $c, $dst">;
def XORri   : F3_2<2, 0b000011,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "xor $b, $c, $dst">;
def XORCCrr : F3_1<2, 0b010011,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "xorcc $b, $c, $dst">;
def XORCCri : F3_2<2, 0b010011,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "xorcc $b, $c, $dst">;
def XNORrr  : F3_1<2, 0b000111,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "xnor $b, $c, $dst">;
def XNORri  : F3_2<2, 0b000111,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "xnor $b, $c, $dst">;
def XNORCCrr: F3_1<2, 0b010111,
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "xnorcc $b, $c, $dst">;
def XNORCCri: F3_2<2, 0b010111,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "xnorcc $b, $c, $dst">;

// Section B.12 - Shift Instructions, p. 107
def SLLrr : F3_1<2, 0b100101,
                 (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                 "sll $b, $c, $dst">;
def SLLri : F3_2<2, 0b100101,
                 (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                 "sll $b, $c, $dst">;
def SRLrr : F3_1<2, 0b100110, 
                 (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                  "srl $b, $c, $dst">;
def SRLri : F3_2<2, 0b100110,
                 (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                 "srl $b, $c, $dst">;
def SRArr : F3_1<2, 0b100111, 
                 (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                  "sra $b, $c, $dst">;
def SRAri : F3_2<2, 0b100111,
                 (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                 "sla $b, $c, $dst">;

// Section B.13 - Add Instructions, p. 108
def ADDrr   : F3_1<2, 0b000000, 
                  (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                  "add $b, $c, $dst">;
def ADDri   : F3_2<2, 0b000000,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "add $b, $c, $dst">;
def ADDCCrr : F3_1<2, 0b010000, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "addcc $b, $c, $dst">;
def ADDCCri : F3_2<2, 0b010000,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "addcc $b, $c, $dst">;
def ADDXrr  : F3_1<2, 0b001000, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "addx $b, $c, $dst">;
def ADDXri  : F3_2<2, 0b001000,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "addx $b, $c, $dst">;
def ADDXCCrr: F3_1<2, 0b011000, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "addxcc $b, $c, $dst">;
def ADDXCCri: F3_2<2, 0b011000,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "addxcc $b, $c, $dst">;

// Section B.15 - Subtract Instructions, p. 110
def SUBrr   : F3_1<2, 0b000100, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "sub $b, $c, $dst">;
def SUBri   : F3_2<2, 0b000100,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "sub $b, $c, $dst">;
def SUBCCrr : F3_1<2, 0b010100, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "subcc $b, $c, $dst">;
def SUBCCri : F3_2<2, 0b010100,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "subcc $b, $c, $dst">;
def SUBXrr  : F3_1<2, 0b001100, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "subx $b, $c, $dst">;
def SUBXri  : F3_2<2, 0b001100,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "subx $b, $c, $dst">;
def SUBXCCrr: F3_1<2, 0b011100, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "subxcc $b, $c, $dst">;
def SUBXCCri: F3_2<2, 0b011100,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "subxcc $b, $c, $dst">;

// Section B.18 - Multiply Instructions, p. 113
def UMULrr  : F3_1<2, 0b001010, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "umul $b, $c, $dst">;
def UMULri  : F3_2<2, 0b001010,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "umul $b, $c, $dst">;
def SMULrr  : F3_1<2, 0b001011, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "smul $b, $c, $dst">;
def SMULri  : F3_2<2, 0b001011,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "smul $b, $c, $dst">;
def UMULCCrr: F3_1<2, 0b011010, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "umulcc $b, $c, $dst">;
def UMULCCri: F3_2<2, 0b011010,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "umulcc $b, $c, $dst">;
def SMULCCrr: F3_1<2, 0b011011, 
                   (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                   "smulcc $b, $c, $dst">;
def SMULCCri: F3_2<2, 0b011011,
                   (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                   "smulcc $b, $c, $dst">;

// Section B.19 - Divide Instructions, p. 115
def UDIVrr   : F3_1<2, 0b001110, 
                    (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                    "udiv $b, $c, $dst">;
def UDIVri   : F3_2<2, 0b001110,
                    (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                    "udiv $b, $c, $dst">;
def SDIVrr   : F3_1<2, 0b001111,
                    (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                    "sdiv $b, $c, $dst">;
def SDIVri   : F3_2<2, 0b001111,
                    (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                    "sdiv $b, $c, $dst">;
def UDIVCCrr : F3_1<2, 0b011110,
                    (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                    "udivcc $b, $c, $dst">;
def UDIVCCri : F3_2<2, 0b011110,
                    (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                    "udivcc $b, $c, $dst">;
def SDIVCCrr : F3_1<2, 0b011111,
                    (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                    "sdivcc $b, $c, $dst">;
def SDIVCCri : F3_2<2, 0b011111,
                    (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                    "sdivcc $b, $c, $dst">;

// Section B.20 - SAVE and RESTORE, p. 117
def SAVErr    : F3_1<2, 0b111100,
                     (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                     "save $b, $c, $dst">;
def SAVEri    : F3_2<2, 0b111100,
                     (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                     "save $b, $c, $dst">;
def RESTORErr : F3_1<2, 0b111101,
                     (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                     "restore $b, $c, $dst">;
def RESTOREri : F3_2<2, 0b111101,
                     (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                     "restore $b, $c, $dst">;

// Section B.21 - Branch on Integer Condition Codes Instructions, p. 119

// conditional branch class:
class BranchV8<bits<4> cc, dag ops, string asmstr>
 : F2_2<cc, 0b010, ops, asmstr> {
  let isBranch = 1;
  let isTerminator = 1;
  let hasDelaySlot = 1;
}

let isBarrier = 1 in
  def BA   : BranchV8<0b1000, (ops IntRegs:$dst), "ba $dst">;
def BN   : BranchV8<0b0000, (ops IntRegs:$dst), "bn $dst">;
def BNE  : BranchV8<0b1001, (ops IntRegs:$dst), "bne $dst">;
def BE   : BranchV8<0b0001, (ops IntRegs:$dst), "be $dst">;
def BG   : BranchV8<0b1010, (ops IntRegs:$dst), "bg $dst">;
def BLE  : BranchV8<0b0010, (ops IntRegs:$dst), "ble $dst">;
def BGE  : BranchV8<0b1011, (ops IntRegs:$dst), "bge $dst">;
def BL   : BranchV8<0b0011, (ops IntRegs:$dst), "bl $dst">;
def BGU  : BranchV8<0b1100, (ops IntRegs:$dst), "bgu $dst">;
def BLEU : BranchV8<0b0100, (ops IntRegs:$dst), "bleu $dst">;
def BCC  : BranchV8<0b1101, (ops IntRegs:$dst), "bcc $dst">;
def BCS  : BranchV8<0b0101, (ops IntRegs:$dst), "bcs $dst">;

// Section B.22 - Branch on Floating-point Condition Codes Instructions, p. 121

// floating-point conditional branch class:
class FPBranchV8<bits<4> cc, dag ops, string asmstr>
 : F2_2<cc, 0b110, ops, asmstr> {
  let isBranch = 1;
  let isTerminator = 1;
  let hasDelaySlot = 1;
}

def FBA  : FPBranchV8<0b1000, (ops IntRegs:$dst), "fba $dst">;
def FBN  : FPBranchV8<0b0000, (ops IntRegs:$dst), "fbn $dst">;
def FBU  : FPBranchV8<0b0111, (ops IntRegs:$dst), "fbu $dst">;
def FBG  : FPBranchV8<0b0110, (ops IntRegs:$dst), "fbg $dst">;
def FBUG : FPBranchV8<0b0101, (ops IntRegs:$dst), "fbug $dst">;
def FBL  : FPBranchV8<0b0100, (ops IntRegs:$dst), "fbl $dst">;
def FBUL : FPBranchV8<0b0011, (ops IntRegs:$dst), "fbul $dst">;
def FBLG : FPBranchV8<0b0010, (ops IntRegs:$dst), "fblg $dst">;
def FBNE : FPBranchV8<0b0001, (ops IntRegs:$dst), "fbne $dst">;
def FBE  : FPBranchV8<0b1001, (ops IntRegs:$dst), "fbe $dst">;
def FBUE : FPBranchV8<0b1010, (ops IntRegs:$dst), "fbue $dst">;
def FBGE : FPBranchV8<0b1011, (ops IntRegs:$dst), "fbge $dst">;
def FBUGE: FPBranchV8<0b1100, (ops IntRegs:$dst), "fbuge $dst">;
def FBLE : FPBranchV8<0b1101, (ops IntRegs:$dst), "fble $dst">;
def FBULE: FPBranchV8<0b1110, (ops IntRegs:$dst), "fbule $dst">;
def FBO  : FPBranchV8<0b1111, (ops IntRegs:$dst), "fbo $dst">;



// Section B.24 - Call and Link Instruction, p. 125
// This is the only Format 1 instruction
let Uses = [O0, O1, O2, O3, O4, O5], hasDelaySlot = 1, isCall = 1 in { 
  // pc-relative call:
  let Defs = [O0, O1, O2, O3, O4, O5, O7, G1, G2, G3, G4, G5, G6, G7,
    D0, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15] in
  def CALL : InstV8 {
    let OperandList = (ops IntRegs:$dst);
    bits<30> disp;
    let op = 1;
    let Inst{29-0} = disp;
    let AsmString = "call $dst";
  }

  // indirect call (O7 is an EXPLICIT def in indirect calls, so it cannot also
  // be an implicit def):
  let Defs = [O0, O1, O2, O3, O4, O5, G1, G2, G3, G4, G5, G6, G7,
    D0, D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15] in
  def JMPLrr : F3_1<2, 0b111000,
                    (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                    "jmpl $b+$c, $dst">;
}

// Section B.29 - Write State Register Instructions
def WRrr : F3_1<2, 0b110000,
                (ops IntRegs:$dst, IntRegs:$b, IntRegs:$c),
                "wr $b, $c, $dst">;
def WRri : F3_2<2, 0b110000,
                (ops IntRegs:$dst, IntRegs:$b, i32imm:$c),
                "wr $b, $c, $dst">;

// Convert Integer to Floating-point Instructions, p. 141
def FITOS : F3_3<2, 0b110100, 0b011000100,
                 (ops FPRegs:$dst, FPRegs:$src),
                 "fitos $src, $dst">;
def FITOD : F3_3<2, 0b110100, 0b011001000, 
                 (ops DFPRegs:$dst, DFPRegs:$src),
                 "fitod $src, $dst">;

// Convert Floating-point to Integer Instructions, p. 142
def FSTOI : F3_3<2, 0b110100, 0b011010001,
                 (ops FPRegs:$dst, FPRegs:$src),
                 "fstoi $src, $dst">;
def FDTOI : F3_3<2, 0b110100, 0b011010010,
                 (ops DFPRegs:$dst, DFPRegs:$src),
                 "fdtoi $src, $dst">;

// Convert between Floating-point Formats Instructions, p. 143
def FSTOD : F3_3<2, 0b110100, 0b011001001, 
                 (ops DFPRegs:$dst, FPRegs:$src),
                 "fstod $src, $dst">;
def FDTOS : F3_3<2, 0b110100, 0b011000110,
                 (ops FPRegs:$dst, DFPRegs:$src),
                 "fdtos $src, $dst">;

// Floating-point Move Instructions, p. 144
def FMOVS : F3_3<2, 0b110100, 0b000000001,
                 (ops FPRegs:$dst, FPRegs:$src),
                 "fmovs $src, $dst">;
def FNEGS : F3_3<2, 0b110100, 0b000000101, 
                 (ops FPRegs:$dst, FPRegs:$src),
                 "fnegs $src, $dst">;
def FABSS : F3_3<2, 0b110100, 0b000001001, 
                 (ops FPRegs:$dst, FPRegs:$src),
                 "fabss $src, $dst">;

// Floating-point Add and Subtract Instructions, p. 146
def FADDS  : F3_3<2, 0b110100, 0b001000001,
                  (ops FPRegs:$dst, FPRegs:$src1, FPRegs:$src2),
                  "fadds $src1, $src2, $dst">;
def FADDD  : F3_3<2, 0b110100, 0b001000010,
                  (ops DFPRegs:$dst, DFPRegs:$src1, DFPRegs:$src2),
                  "faddd $src1, $src2, $dst">;
def FSUBS  : F3_3<2, 0b110100, 0b001000101,
                  (ops FPRegs:$dst, FPRegs:$src1, FPRegs:$src2),
                  "fsubs $src1, $src2, $dst">;
def FSUBD  : F3_3<2, 0b110100, 0b001000110,
                  (ops DFPRegs:$dst, DFPRegs:$src1, DFPRegs:$src2),
                  "fsubd $src1, $src2, $dst">;

// Floating-point Multiply and Divide Instructions, p. 147
def FMULS  : F3_3<2, 0b110100, 0b001001001,
                  (ops FPRegs:$dst, FPRegs:$src1, FPRegs:$src2),
                  "fmuls $src1, $src2, $dst">;
def FMULD  : F3_3<2, 0b110100, 0b001001010,
                  (ops DFPRegs:$dst, DFPRegs:$src1, DFPRegs:$src2),
                  "fmuld $src1, $src2, $dst">;
def FSMULD : F3_3<2, 0b110100, 0b001101001,
                  (ops DFPRegs:$dst, FPRegs:$src1, FPRegs:$src2),
                  "fsmuld $src1, $src2, $dst">;
def FDIVS  : F3_3<2, 0b110100, 0b001001101,
                 (ops FPRegs:$dst, FPRegs:$src1, FPRegs:$src2),
                 "fdivs $src1, $src2, $dst">;
def FDIVD  : F3_3<2, 0b110100, 0b001001110,
                 (ops DFPRegs:$dst, DFPRegs:$src1, DFPRegs:$src2),
                 "fdivd $src1, $src2, $dst">;

// Floating-point Compare Instructions, p. 148
// Note: the 2nd template arg is different for these guys.
// Note 2: the result of a FCMP is not available until the 2nd cycle
// after the instr is retired, but there is no interlock. This behavior
// is modelled with a forced noop after the instruction.
def FCMPS  : F3_3<2, 0b110101, 0b001010001,
                  (ops FPRegs:$src1, FPRegs:$src2),
                  "fcmps $src1, $src2\n\tnop">;
def FCMPD  : F3_3<2, 0b110101, 0b001010010,
                  (ops DFPRegs:$src1, DFPRegs:$src2),
                  "fcmpd $src1, $src2\n\tnop">;
def FCMPES : F3_3<2, 0b110101, 0b001010101,
                  (ops FPRegs:$src1, FPRegs:$src2),
                  "fcmpes $src1, $src2\n\tnop">;
def FCMPED : F3_3<2, 0b110101, 0b001010110,
                  (ops DFPRegs:$src1, DFPRegs:$src2),
                  "fcmped $src1, $src2\n\tnop">;