forked from OSchip/llvm-project
508 lines
15 KiB
TableGen
508 lines
15 KiB
TableGen
//===-- BPFInstrInfo.td - Target Description for BPF Target ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file describes the BPF instructions in TableGen format.
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//
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//===----------------------------------------------------------------------===//
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include "BPFInstrFormats.td"
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// Instruction Operands and Patterns
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// These are target-independent nodes, but have target-specific formats.
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def SDT_BPFCallSeqStart : SDCallSeqStart<[SDTCisVT<0, iPTR>]>;
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def SDT_BPFCallSeqEnd : SDCallSeqEnd<[SDTCisVT<0, iPTR>, SDTCisVT<1, iPTR>]>;
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def SDT_BPFCall : SDTypeProfile<0, -1, [SDTCisVT<0, iPTR>]>;
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def SDT_BPFSetFlag : SDTypeProfile<0, 3, [SDTCisSameAs<0, 1>]>;
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def SDT_BPFSelectCC : SDTypeProfile<1, 5, [SDTCisSameAs<1, 2>,
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SDTCisSameAs<0, 4>,
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SDTCisSameAs<4, 5>]>;
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def SDT_BPFBrCC : SDTypeProfile<0, 4, [SDTCisSameAs<0, 1>,
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SDTCisVT<3, OtherVT>]>;
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def SDT_BPFWrapper : SDTypeProfile<1, 1, [SDTCisSameAs<0, 1>,
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SDTCisPtrTy<0>]>;
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def BPFcall : SDNode<"BPFISD::CALL", SDT_BPFCall,
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[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
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SDNPVariadic]>;
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def BPFretflag : SDNode<"BPFISD::RET_FLAG", SDTNone,
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[SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
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def BPFcallseq_start: SDNode<"ISD::CALLSEQ_START", SDT_BPFCallSeqStart,
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[SDNPHasChain, SDNPOutGlue]>;
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def BPFcallseq_end : SDNode<"ISD::CALLSEQ_END", SDT_BPFCallSeqEnd,
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[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue]>;
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def BPFbrcc : SDNode<"BPFISD::BR_CC", SDT_BPFBrCC,
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[SDNPHasChain, SDNPOutGlue, SDNPInGlue]>;
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def BPFselectcc : SDNode<"BPFISD::SELECT_CC", SDT_BPFSelectCC, [SDNPInGlue]>;
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def BPFWrapper : SDNode<"BPFISD::Wrapper", SDT_BPFWrapper>;
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def brtarget : Operand<OtherVT>;
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def calltarget : Operand<i64>;
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def u64imm : Operand<i64> {
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let PrintMethod = "printImm64Operand";
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}
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def i64immSExt32 : PatLeaf<(imm),
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[{return isInt<32>(N->getSExtValue()); }]>;
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// Addressing modes.
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def ADDRri : ComplexPattern<i64, 2, "SelectAddr", [frameindex], []>;
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// Address operands
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def MEMri : Operand<i64> {
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let PrintMethod = "printMemOperand";
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let EncoderMethod = "getMemoryOpValue";
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let MIOperandInfo = (ops GPR, i16imm);
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}
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// Conditional code predicates - used for pattern matching for jump instructions
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def BPF_CC_EQ : PatLeaf<(imm),
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[{return (N->getZExtValue() == ISD::SETEQ);}]>;
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def BPF_CC_NE : PatLeaf<(imm),
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[{return (N->getZExtValue() == ISD::SETNE);}]>;
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def BPF_CC_GE : PatLeaf<(imm),
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[{return (N->getZExtValue() == ISD::SETGE);}]>;
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def BPF_CC_GT : PatLeaf<(imm),
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[{return (N->getZExtValue() == ISD::SETGT);}]>;
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def BPF_CC_GTU : PatLeaf<(imm),
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[{return (N->getZExtValue() == ISD::SETUGT);}]>;
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def BPF_CC_GEU : PatLeaf<(imm),
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[{return (N->getZExtValue() == ISD::SETUGE);}]>;
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// jump instructions
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class JMP_RR<bits<4> Opc, string OpcodeStr, PatLeaf Cond>
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: InstBPF<(outs), (ins GPR:$dst, GPR:$src, brtarget:$BrDst),
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!strconcat(OpcodeStr, "\t$dst, $src goto $BrDst"),
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[(BPFbrcc i64:$dst, i64:$src, Cond, bb:$BrDst)]> {
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<4> src;
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bits<16> BrDst;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{55-52} = src;
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let Inst{51-48} = dst;
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let Inst{47-32} = BrDst;
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let op = Opc;
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let BPFSrc = 1;
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let BPFClass = 5; // BPF_JMP
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}
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class JMP_RI<bits<4> Opc, string OpcodeStr, PatLeaf Cond>
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: InstBPF<(outs), (ins GPR:$dst, i64imm:$imm, brtarget:$BrDst),
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!strconcat(OpcodeStr, "i\t$dst, $imm goto $BrDst"),
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[(BPFbrcc i64:$dst, i64immSExt32:$imm, Cond, bb:$BrDst)]> {
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<16> BrDst;
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bits<32> imm;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{51-48} = dst;
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let Inst{47-32} = BrDst;
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let Inst{31-0} = imm;
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let op = Opc;
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let BPFSrc = 0;
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let BPFClass = 5; // BPF_JMP
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}
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multiclass J<bits<4> Opc, string OpcodeStr, PatLeaf Cond> {
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def _rr : JMP_RR<Opc, OpcodeStr, Cond>;
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def _ri : JMP_RI<Opc, OpcodeStr, Cond>;
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}
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let isBranch = 1, isTerminator = 1, hasDelaySlot=0 in {
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// cmp+goto instructions
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defm JEQ : J<0x1, "jeq", BPF_CC_EQ>;
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defm JUGT : J<0x2, "jgt", BPF_CC_GTU>;
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defm JUGE : J<0x3, "jge", BPF_CC_GEU>;
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defm JNE : J<0x5, "jne", BPF_CC_NE>;
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defm JSGT : J<0x6, "jsgt", BPF_CC_GT>;
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defm JSGE : J<0x7, "jsge", BPF_CC_GE>;
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}
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// ALU instructions
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class ALU_RI<bits<4> Opc, string OpcodeStr, SDNode OpNode>
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: InstBPF<(outs GPR:$dst), (ins GPR:$src2, i64imm:$imm),
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!strconcat(OpcodeStr, "i\t$dst, $imm"),
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[(set GPR:$dst, (OpNode GPR:$src2, i64immSExt32:$imm))]> {
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<32> imm;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{51-48} = dst;
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let Inst{31-0} = imm;
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let op = Opc;
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let BPFSrc = 0;
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let BPFClass = 7; // BPF_ALU64
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}
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class ALU_RR<bits<4> Opc, string OpcodeStr, SDNode OpNode>
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: InstBPF<(outs GPR:$dst), (ins GPR:$src2, GPR:$src),
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!strconcat(OpcodeStr, "\t$dst, $src"),
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[(set GPR:$dst, (OpNode i64:$src2, i64:$src))]> {
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<4> src;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{55-52} = src;
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let Inst{51-48} = dst;
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let op = Opc;
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let BPFSrc = 1;
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let BPFClass = 7; // BPF_ALU64
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}
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multiclass ALU<bits<4> Opc, string OpcodeStr, SDNode OpNode> {
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def _rr : ALU_RR<Opc, OpcodeStr, OpNode>;
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def _ri : ALU_RI<Opc, OpcodeStr, OpNode>;
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}
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let Constraints = "$dst = $src2" in {
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let isAsCheapAsAMove = 1 in {
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defm ADD : ALU<0x0, "add", add>;
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defm SUB : ALU<0x1, "sub", sub>;
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defm OR : ALU<0x4, "or", or>;
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defm AND : ALU<0x5, "and", and>;
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defm SLL : ALU<0x6, "sll", shl>;
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defm SRL : ALU<0x7, "srl", srl>;
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defm XOR : ALU<0xa, "xor", xor>;
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defm SRA : ALU<0xc, "sra", sra>;
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}
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defm MUL : ALU<0x2, "mul", mul>;
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defm DIV : ALU<0x3, "div", udiv>;
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}
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class MOV_RR<string OpcodeStr>
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: InstBPF<(outs GPR:$dst), (ins GPR:$src),
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!strconcat(OpcodeStr, "\t$dst, $src"),
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[]> {
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<4> src;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{55-52} = src;
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let Inst{51-48} = dst;
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let op = 0xb; // BPF_MOV
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let BPFSrc = 1; // BPF_X
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let BPFClass = 7; // BPF_ALU64
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}
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class MOV_RI<string OpcodeStr>
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: InstBPF<(outs GPR:$dst), (ins i64imm:$imm),
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!strconcat(OpcodeStr, "\t$dst, $imm"),
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[(set GPR:$dst, (i64 i64immSExt32:$imm))]> {
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<32> imm;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{51-48} = dst;
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let Inst{31-0} = imm;
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let op = 0xb; // BPF_MOV
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let BPFSrc = 0; // BPF_K
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let BPFClass = 7; // BPF_ALU64
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}
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def MOV_rr : MOV_RR<"mov">;
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def MOV_ri : MOV_RI<"mov">;
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class LD_IMM64<bits<4> Pseudo, string OpcodeStr>
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: InstBPF<(outs GPR:$dst), (ins u64imm:$imm),
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!strconcat(OpcodeStr, "\t$dst, $imm"),
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[(set GPR:$dst, (i64 imm:$imm))]> {
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bits<3> mode;
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bits<2> size;
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bits<4> dst;
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bits<64> imm;
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let Inst{63-61} = mode;
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let Inst{60-59} = size;
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let Inst{51-48} = dst;
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let Inst{55-52} = Pseudo;
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let Inst{47-32} = 0;
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let Inst{31-0} = imm{31-0};
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let mode = 0; // BPF_IMM
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let size = 3; // BPF_DW
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let BPFClass = 0; // BPF_LD
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}
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def LD_imm64 : LD_IMM64<0, "ld_64">;
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// STORE instructions
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class STORE<bits<2> SizeOp, string OpcodeStr, list<dag> Pattern>
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: InstBPF<(outs), (ins GPR:$src, MEMri:$addr),
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!strconcat(OpcodeStr, "\t$addr, $src"), Pattern> {
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bits<3> mode;
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bits<2> size;
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bits<4> src;
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bits<20> addr;
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let Inst{63-61} = mode;
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let Inst{60-59} = size;
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let Inst{51-48} = addr{19-16}; // base reg
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let Inst{55-52} = src;
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let Inst{47-32} = addr{15-0}; // offset
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let mode = 3; // BPF_MEM
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let size = SizeOp;
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let BPFClass = 3; // BPF_STX
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}
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class STOREi64<bits<2> Opc, string OpcodeStr, PatFrag OpNode>
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: STORE<Opc, OpcodeStr, [(OpNode i64:$src, ADDRri:$addr)]>;
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def STW : STOREi64<0x0, "stw", truncstorei32>;
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def STH : STOREi64<0x1, "sth", truncstorei16>;
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def STB : STOREi64<0x2, "stb", truncstorei8>;
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def STD : STOREi64<0x3, "std", store>;
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// LOAD instructions
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class LOAD<bits<2> SizeOp, string OpcodeStr, list<dag> Pattern>
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: InstBPF<(outs GPR:$dst), (ins MEMri:$addr),
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!strconcat(OpcodeStr, "\t$dst, $addr"), Pattern> {
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bits<3> mode;
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bits<2> size;
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bits<4> dst;
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bits<20> addr;
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let Inst{63-61} = mode;
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let Inst{60-59} = size;
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let Inst{51-48} = dst;
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let Inst{55-52} = addr{19-16};
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let Inst{47-32} = addr{15-0};
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let mode = 3; // BPF_MEM
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let size = SizeOp;
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let BPFClass = 1; // BPF_LDX
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}
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class LOADi64<bits<2> SizeOp, string OpcodeStr, PatFrag OpNode>
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: LOAD<SizeOp, OpcodeStr, [(set i64:$dst, (OpNode ADDRri:$addr))]>;
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def LDW : LOADi64<0x0, "ldw", zextloadi32>;
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def LDH : LOADi64<0x1, "ldh", zextloadi16>;
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def LDB : LOADi64<0x2, "ldb", zextloadi8>;
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def LDD : LOADi64<0x3, "ldd", load>;
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class BRANCH<bits<4> Opc, string OpcodeStr, list<dag> Pattern>
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: InstBPF<(outs), (ins brtarget:$BrDst),
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!strconcat(OpcodeStr, "\t$BrDst"), Pattern> {
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bits<4> op;
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bits<16> BrDst;
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bits<1> BPFSrc;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{47-32} = BrDst;
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let op = Opc;
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let BPFSrc = 0;
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let BPFClass = 5; // BPF_JMP
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}
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class CALL<string OpcodeStr>
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: InstBPF<(outs), (ins calltarget:$BrDst),
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!strconcat(OpcodeStr, "\t$BrDst"), []> {
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bits<4> op;
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bits<32> BrDst;
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bits<1> BPFSrc;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{31-0} = BrDst;
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let op = 8; // BPF_CALL
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let BPFSrc = 0;
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let BPFClass = 5; // BPF_JMP
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}
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// Jump always
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let isBranch = 1, isTerminator = 1, hasDelaySlot=0, isBarrier = 1 in {
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def JMP : BRANCH<0x0, "jmp", [(br bb:$BrDst)]>;
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}
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// Jump and link
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let isCall=1, hasDelaySlot=0, Uses = [R11],
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// Potentially clobbered registers
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Defs = [R0, R1, R2, R3, R4, R5] in {
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def JAL : CALL<"call">;
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}
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class NOP_I<string OpcodeStr>
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: InstBPF<(outs), (ins i32imm:$imm),
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!strconcat(OpcodeStr, "\t$imm"), []> {
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// mov r0, r0 == nop
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bits<4> op;
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bits<1> BPFSrc;
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bits<4> dst;
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bits<4> src;
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let Inst{63-60} = op;
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let Inst{59} = BPFSrc;
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let Inst{55-52} = src;
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let Inst{51-48} = dst;
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let op = 0xb; // BPF_MOV
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let BPFSrc = 1; // BPF_X
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let BPFClass = 7; // BPF_ALU64
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let src = 0; // R0
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let dst = 0; // R0
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}
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let hasSideEffects = 0 in
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def NOP : NOP_I<"nop">;
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class RET<string OpcodeStr>
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: InstBPF<(outs), (ins),
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!strconcat(OpcodeStr, ""), [(BPFretflag)]> {
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bits<4> op;
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let Inst{63-60} = op;
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let Inst{59} = 0;
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let Inst{31-0} = 0;
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let op = 9; // BPF_EXIT
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let BPFClass = 5; // BPF_JMP
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}
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let isReturn = 1, isTerminator = 1, hasDelaySlot=0, isBarrier = 1,
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isNotDuplicable = 1 in {
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def RET : RET<"ret">;
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}
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// ADJCALLSTACKDOWN/UP pseudo insns
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let Defs = [R11], Uses = [R11] in {
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def ADJCALLSTACKDOWN : Pseudo<(outs), (ins i64imm:$amt),
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"#ADJCALLSTACKDOWN $amt",
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[(BPFcallseq_start timm:$amt)]>;
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def ADJCALLSTACKUP : Pseudo<(outs), (ins i64imm:$amt1, i64imm:$amt2),
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"#ADJCALLSTACKUP $amt1 $amt2",
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[(BPFcallseq_end timm:$amt1, timm:$amt2)]>;
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}
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let usesCustomInserter = 1 in {
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def Select : Pseudo<(outs GPR:$dst),
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(ins GPR:$lhs, GPR:$rhs, i64imm:$imm, GPR:$src, GPR:$src2),
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"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
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[(set i64:$dst,
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(BPFselectcc i64:$lhs, i64:$rhs, (i64 imm:$imm), i64:$src, i64:$src2))]>;
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}
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// load 64-bit global addr into register
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def : Pat<(BPFWrapper tglobaladdr:$in), (LD_imm64 tglobaladdr:$in)>;
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// 0xffffFFFF doesn't fit into simm32, optimize common case
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def : Pat<(i64 (and (i64 GPR:$src), 0xffffFFFF)),
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(SRL_ri (SLL_ri (i64 GPR:$src), 32), 32)>;
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// Calls
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def : Pat<(BPFcall tglobaladdr:$dst), (JAL tglobaladdr:$dst)>;
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def : Pat<(BPFcall imm:$dst), (JAL imm:$dst)>;
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// Loads
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def : Pat<(extloadi8 ADDRri:$src), (i64 (LDB ADDRri:$src))>;
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def : Pat<(extloadi16 ADDRri:$src), (i64 (LDH ADDRri:$src))>;
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def : Pat<(extloadi32 ADDRri:$src), (i64 (LDW ADDRri:$src))>;
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// Atomics
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class XADD<bits<2> SizeOp, string OpcodeStr, PatFrag OpNode>
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: InstBPF<(outs GPR:$dst), (ins MEMri:$addr, GPR:$val),
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!strconcat(OpcodeStr, "\t$dst, $addr, $val"),
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[(set GPR:$dst, (OpNode ADDRri:$addr, GPR:$val))]> {
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|
bits<3> mode;
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|
bits<2> size;
|
|
bits<4> src;
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|
bits<20> addr;
|
|
|
|
let Inst{63-61} = mode;
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|
let Inst{60-59} = size;
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|
let Inst{51-48} = addr{19-16}; // base reg
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|
let Inst{55-52} = src;
|
|
let Inst{47-32} = addr{15-0}; // offset
|
|
|
|
let mode = 6; // BPF_XADD
|
|
let size = SizeOp;
|
|
let BPFClass = 3; // BPF_STX
|
|
}
|
|
|
|
let Constraints = "$dst = $val" in {
|
|
def XADD32 : XADD<0, "xadd32", atomic_load_add_32>;
|
|
def XADD64 : XADD<3, "xadd64", atomic_load_add_64>;
|
|
// undefined def XADD16 : XADD<1, "xadd16", atomic_load_add_16>;
|
|
// undefined def XADD8 : XADD<2, "xadd8", atomic_load_add_8>;
|
|
}
|
|
|
|
let Defs = [R0, R1, R2, R3, R4, R5], Uses = [R6], hasSideEffects = 1,
|
|
hasExtraDefRegAllocReq = 1, hasExtraSrcRegAllocReq = 1, mayLoad = 1 in {
|
|
class LOAD_ABS<bits<2> SizeOp, string OpcodeStr, Intrinsic OpNode>
|
|
: InstBPF<(outs), (ins GPR:$skb, i64imm:$imm),
|
|
!strconcat(OpcodeStr, "\tr0, $skb.data + $imm"),
|
|
[(set R0, (OpNode GPR:$skb, i64immSExt32:$imm))]> {
|
|
bits<3> mode;
|
|
bits<2> size;
|
|
bits<32> imm;
|
|
|
|
let Inst{63-61} = mode;
|
|
let Inst{60-59} = size;
|
|
let Inst{31-0} = imm;
|
|
|
|
let mode = 1; // BPF_ABS
|
|
let size = SizeOp;
|
|
let BPFClass = 0; // BPF_LD
|
|
}
|
|
|
|
class LOAD_IND<bits<2> SizeOp, string OpcodeStr, Intrinsic OpNode>
|
|
: InstBPF<(outs), (ins GPR:$skb, GPR:$val),
|
|
!strconcat(OpcodeStr, "\tr0, $skb.data + $val"),
|
|
[(set R0, (OpNode GPR:$skb, GPR:$val))]> {
|
|
bits<3> mode;
|
|
bits<2> size;
|
|
bits<4> val;
|
|
|
|
let Inst{63-61} = mode;
|
|
let Inst{60-59} = size;
|
|
let Inst{55-52} = val;
|
|
|
|
let mode = 2; // BPF_IND
|
|
let size = SizeOp;
|
|
let BPFClass = 0; // BPF_LD
|
|
}
|
|
}
|
|
|
|
def LD_ABS_B : LOAD_ABS<2, "ldabs_b", int_bpf_load_byte>;
|
|
def LD_ABS_H : LOAD_ABS<1, "ldabs_h", int_bpf_load_half>;
|
|
def LD_ABS_W : LOAD_ABS<0, "ldabs_w", int_bpf_load_word>;
|
|
|
|
def LD_IND_B : LOAD_IND<2, "ldind_b", int_bpf_load_byte>;
|
|
def LD_IND_H : LOAD_IND<1, "ldind_h", int_bpf_load_half>;
|
|
def LD_IND_W : LOAD_IND<0, "ldind_w", int_bpf_load_word>;
|