// Describe MSP430 instructions format here
//
+// Format specifies the encoding used by the instruction. This is part of the
+// ad-hoc solution used to emit machine instruction encodings by our machine
+// code emitter.
+class Format<bits<2> val> {
+ bits<2> Value = val;
+}
+
+def PseudoFrm : Format<0>;
+def SingleOpFrm : Format<1>;
+def DoubleOpFrm : Format<2>;
+def CondJumpFrm : Format<3>;
+
+class SourceMode<bits<2> val> {
+ bits<2> Value = val;
+}
+
+def SrcReg : SourceMode<0>;
+def SrcMem : SourceMode<1>;
+def SrcIndReg : SourceMode<2>;
+def SrcPostInc : SourceMode<3>;
+def SrcImm : SourceMode<3>;
+
+class DestMode<bit val> {
+ bit Value = val;
+}
+
+def DstReg : DestMode<0>;
+def DstMem : DestMode<1>;
+
+class SizeVal<bits<3> val> {
+ bits<3> Value = val;
+}
+
+def SizeUnknown : SizeVal<0>; // Unknown / unset size
+def SizeSpecial : SizeVal<1>; // Special instruction, e.g. pseudo
+def Size2Bytes : SizeVal<2>;
+def Size4Bytes : SizeVal<3>;
+def Size6Bytes : SizeVal<4>;
+
// Generic MSP430 Format
-class MSP430Inst<dag outs, dag ins, string asmstr> : Instruction {
+class MSP430Inst<dag outs, dag ins, SizeVal sz, Format f,
+ string asmstr> : Instruction {
field bits<16> Inst;
let Namespace = "MSP430";
dag OutOperandList = outs;
dag InOperandList = ins;
+ Format Form = f;
+ SizeVal Sz = sz;
+
+ // Define how we want to layout our TargetSpecific information field... This
+ // should be kept up-to-date with the fields in the MSP430InstrInfo.h file.
+ let TSFlags{1-0} = Form.Value;
+ let TSFlags{4-2} = Sz.Value;
+
let AsmString = asmstr;
}
// FIXME: Create different classes for different addressing modes.
// MSP430 Double Operand (Format I) Instructions
-class IForm<bits<4> opcode, bit ad, bit bw, bits<2> as,
+class IForm<bits<4> opcode, DestMode dest, bit bw, SourceMode src, SizeVal sz,
dag outs, dag ins, string asmstr, list<dag> pattern>
- : MSP430Inst<outs, ins, asmstr> {
+ : MSP430Inst<outs, ins, sz, DoubleOpFrm, asmstr> {
let Pattern = pattern;
+
+ DestMode ad = dest;
+ SourceMode as = src;
let Inst{12-15} = opcode;
- let Inst{7} = ad;
+ let Inst{7} = ad.Value;
let Inst{6} = bw;
- let Inst{4-5} = as;
+ let Inst{4-5} = as.Value;
}
+// 8 bit IForm instructions
+class IForm8<bits<4> opcode, DestMode dest, SourceMode src, SizeVal sz,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm<opcode, dest, 1, src, sz, outs, ins, asmstr, pattern>;
+
+class I8rr<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm8<opcode, DstReg, SrcReg, Size2Bytes, outs, ins, asmstr, pattern>;
+
+class I8ri<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm8<opcode, DstReg, SrcImm, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class I8rm<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm8<opcode, DstReg, SrcMem, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class I8mr<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm8<opcode, DstMem, SrcReg, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class I8mi<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm8<opcode, DstMem, SrcImm, Size6Bytes, outs, ins, asmstr, pattern>;
+
+class I8mm<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm8<opcode, DstMem, SrcMem, Size6Bytes, outs, ins, asmstr, pattern>;
+
+// 16 bit IForm instructions
+class IForm16<bits<4> opcode, DestMode dest, SourceMode src, SizeVal sz,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm<opcode, dest, 0, src, sz, outs, ins, asmstr, pattern>;
+
+class I16rr<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm16<opcode, DstReg, SrcReg, Size2Bytes, outs, ins, asmstr, pattern>;
+
+class I16ri<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm16<opcode, DstReg, SrcImm, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class I16rm<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm16<opcode, DstReg, SrcMem, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class I16mr<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm16<opcode, DstMem, SrcReg, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class I16mi<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm16<opcode, DstMem, SrcImm, Size6Bytes, outs, ins, asmstr, pattern>;
+
+class I16mm<bits<4> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IForm16<opcode, DstMem, SrcMem, Size6Bytes, outs, ins, asmstr, pattern>;
+
// MSP430 Single Operand (Format II) Instructions
-class IIForm<bits<9> opcode, bit bw, bits<2> ad,
+class IIForm<bits<9> opcode, bit bw, SourceMode src, SizeVal sz,
dag outs, dag ins, string asmstr, list<dag> pattern>
- : MSP430Inst<outs, ins, asmstr> {
+ : MSP430Inst<outs, ins, sz, SingleOpFrm, asmstr> {
let Pattern = pattern;
+ SourceMode as = src;
+
let Inst{7-15} = opcode;
let Inst{6} = bw;
- let Inst{4-5} = ad;
+ let Inst{4-5} = as.Value;
}
+// 8 bit IIForm instructions
+class IIForm8<bits<9> opcode, SourceMode src, SizeVal sz,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm<opcode, 1, src, sz, outs, ins, asmstr, pattern>;
+
+class II8r<bits<9> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm8<opcode, SrcReg, Size2Bytes, outs, ins, asmstr, pattern>;
+
+class II8m<bits<9> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm8<opcode, SrcMem, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class II8i<bits<9> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm8<opcode, SrcImm, Size4Bytes, outs, ins, asmstr, pattern>;
+
+// 16 bit IIForm instructions
+class IIForm16<bits<9> opcode, SourceMode src, SizeVal sz,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm<opcode, 0, src, sz, outs, ins, asmstr, pattern>;
+
+class II16r<bits<9> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm16<opcode, SrcReg, Size2Bytes, outs, ins, asmstr, pattern>;
+
+class II16m<bits<9> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm16<opcode, SrcMem, Size4Bytes, outs, ins, asmstr, pattern>;
+
+class II16i<bits<9> opcode,
+ dag outs, dag ins, string asmstr, list<dag> pattern>
+ : IIForm16<opcode, SrcImm, Size4Bytes, outs, ins, asmstr, pattern>;
+
// MSP430 Conditional Jumps Instructions
-class CJForm<bits<3> opcode, bits<3> cond, bit s,
+class CJForm<bits<3> opcode, bits<3> cond,
dag outs, dag ins, string asmstr, list<dag> pattern>
- : MSP430Inst<outs, ins, asmstr> {
+ : MSP430Inst<outs, ins, Size2Bytes, CondJumpFrm, asmstr> {
let Pattern = pattern;
let Inst{13-15} = opcode;
let Inst{10-12} = cond;
- let Inst{9} = s;
}
// Pseudo instructions
class Pseudo<dag outs, dag ins, string asmstr, list<dag> pattern>
- : MSP430Inst<outs, ins, asmstr> {
+ : MSP430Inst<outs, ins, SizeSpecial, PseudoFrm, asmstr> {
let Pattern = pattern;
let Inst{15-0} = 0;
}