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//===-- SparcInstrFormats.td - Sparc Instruction Formats ---*- tablegen -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
class InstSP<dag outs, dag ins, string asmstr, list<dag> pattern>
: Instruction {
field bits<32> Inst;
let Namespace = "SP";
bits<2> op;
let Inst{31-30} = op; // Top two bits are the 'op' field
dag OutOperandList = outs;
dag InOperandList = ins;
let AsmString = asmstr;
let Pattern = pattern;
}
//===----------------------------------------------------------------------===//
// Format #2 instruction classes in the Sparc
//===----------------------------------------------------------------------===//
// Format 2 instructions
class F2<dag outs, dag ins, string asmstr, list<dag> pattern>
: InstSP<outs, ins, asmstr, pattern> {
bits<3> op2;
bits<22> imm22;
let op = 0; // op = 0
let Inst{24-22} = op2;
let Inst{21-0} = imm22;
}
// Specific F2 classes: SparcV8 manual, page 44
//
class F2_1<bits<3> op2Val, dag outs, dag ins, string asmstr, list<dag> pattern>
: F2<outs, ins, asmstr, pattern> {
bits<5> rd;
let op2 = op2Val;
let Inst{29-25} = rd;
}
class F2_2<bits<4> condVal, bits<3> op2Val, dag outs, dag ins, string asmstr,
list<dag> pattern> : F2<outs, ins, asmstr, pattern> {
bits<4> cond;
bit annul = 0; // currently unused
let cond = condVal;
let op2 = op2Val;
let Inst{29} = annul;
let Inst{28-25} = cond;
}
//===----------------------------------------------------------------------===//
// Format #3 instruction classes in the Sparc
//===----------------------------------------------------------------------===//
class F3<dag outs, dag ins, string asmstr, list<dag> pattern>
: InstSP<outs, ins, asmstr, pattern> {
bits<5> rd;
bits<6> op3;
bits<5> rs1;
let op{1} = 1; // Op = 2 or 3
let Inst{29-25} = rd;
let Inst{24-19} = op3;
let Inst{18-14} = rs1;
}
// Specific F3 classes: SparcV8 manual, page 44
//
class F3_1<bits<2> opVal, bits<6> op3val, dag outs, dag ins,
string asmstr, list<dag> pattern> : F3<outs, ins, asmstr, pattern> {
bits<8> asi = 0; // asi not currently used
bits<5> rs2;
let op = opVal;
let op3 = op3val;
let Inst{13} = 0; // i field = 0
let Inst{12-5} = asi; // address space identifier
let Inst{4-0} = rs2;
}
class F3_2<bits<2> opVal, bits<6> op3val, dag outs, dag ins,
string asmstr, list<dag> pattern> : F3<outs, ins, asmstr, pattern> {
bits<13> simm13;
let op = opVal;
let op3 = op3val;
let Inst{13} = 1; // i field = 1
let Inst{12-0} = simm13;
}
// floating-point
class F3_3<bits<2> opVal, bits<6> op3val, bits<9> opfval, dag outs, dag ins,
string asmstr, list<dag> pattern> : F3<outs, ins, asmstr, pattern> {
bits<5> rs2;
let op = opVal;
let op3 = op3val;
let Inst{13-5} = opfval; // fp opcode
let Inst{4-0} = rs2;
}
// Shift by register rs2.
class F3_Sr<bits<2> opVal, bits<6> op3val, bit xVal, dag outs, dag ins,
string asmstr, list<dag> pattern> : F3<outs, ins, asmstr, pattern> {
bit x = xVal; // 1 for 64-bit shifts.
bits<5> rs2;
let op = opVal;
let op3 = op3val;
let Inst{13} = 0; // i field = 0
let Inst{12} = x; // extended registers.
let Inst{4-0} = rs2;
}
// Shift by immediate.
class F3_Si<bits<2> opVal, bits<6> op3val, bit xVal, dag outs, dag ins,
string asmstr, list<dag> pattern> : F3<outs, ins, asmstr, pattern> {
bit x = xVal; // 1 for 64-bit shifts.
bits<6> shcnt; // shcnt32 / shcnt64.
let op = opVal;
let op3 = op3val;
let Inst{13} = 1; // i field = 1
let Inst{12} = x; // extended registers.
let Inst{5-0} = shcnt;
}
// Define rr and ri shift instructions with patterns.
multiclass F3_S<string OpcStr, bits<6> Op3Val, bit XVal, SDNode OpNode,
ValueType VT, RegisterClass RC> {
def rr : F3_Sr<2, Op3Val, XVal, (outs RC:$rd), (ins RC:$rs, IntRegs:$rs2),
!strconcat(OpcStr, " $rs, $rs2, $rd"),
[(set VT:$rd, (OpNode VT:$rs, i32:$rs2))]>;
def ri : F3_Si<2, Op3Val, XVal, (outs RC:$rd), (ins RC:$rs, i32imm:$shcnt),
!strconcat(OpcStr, " $rs, $shcnt, $rd"),
[(set VT:$rd, (OpNode VT:$rs, (i32 imm:$shcnt)))]>;
}
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