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llvm-project/llvm/lib/Target/BPF/BPFInstrInfo.td

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//===-- BPFInstrInfo.td - Target Description for BPF Target ---------------===//
//
// 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 BPF instructions in TableGen format.
//
//===----------------------------------------------------------------------===//
include "BPFInstrFormats.td"
// Instruction Operands and Patterns
// These are target-independent nodes, but have target-specific formats.
def SDT_BPFCallSeqStart : SDCallSeqStart<[SDTCisVT<0, iPTR>,
SDTCisVT<1, iPTR>]>;
def SDT_BPFCallSeqEnd : SDCallSeqEnd<[SDTCisVT<0, iPTR>, SDTCisVT<1, iPTR>]>;
def SDT_BPFCall : SDTypeProfile<0, -1, [SDTCisVT<0, iPTR>]>;
def SDT_BPFSetFlag : SDTypeProfile<0, 3, [SDTCisSameAs<0, 1>]>;
def SDT_BPFSelectCC : SDTypeProfile<1, 5, [SDTCisSameAs<1, 2>,
SDTCisSameAs<0, 4>,
SDTCisSameAs<4, 5>]>;
def SDT_BPFBrCC : SDTypeProfile<0, 4, [SDTCisSameAs<0, 1>,
SDTCisVT<3, OtherVT>]>;
def SDT_BPFWrapper : SDTypeProfile<1, 1, [SDTCisSameAs<0, 1>,
SDTCisPtrTy<0>]>;
def BPFcall : SDNode<"BPFISD::CALL", SDT_BPFCall,
[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue,
SDNPVariadic]>;
def BPFretflag : SDNode<"BPFISD::RET_FLAG", SDTNone,
[SDNPHasChain, SDNPOptInGlue, SDNPVariadic]>;
def BPFcallseq_start: SDNode<"ISD::CALLSEQ_START", SDT_BPFCallSeqStart,
[SDNPHasChain, SDNPOutGlue]>;
def BPFcallseq_end : SDNode<"ISD::CALLSEQ_END", SDT_BPFCallSeqEnd,
[SDNPHasChain, SDNPOptInGlue, SDNPOutGlue]>;
def BPFbrcc : SDNode<"BPFISD::BR_CC", SDT_BPFBrCC,
[SDNPHasChain, SDNPOutGlue, SDNPInGlue]>;
def BPFselectcc : SDNode<"BPFISD::SELECT_CC", SDT_BPFSelectCC, [SDNPInGlue]>;
def BPFWrapper : SDNode<"BPFISD::Wrapper", SDT_BPFWrapper>;
def BPFIsLittleEndian : Predicate<"CurDAG->getDataLayout().isLittleEndian()">;
def BPFIsBigEndian : Predicate<"!CurDAG->getDataLayout().isLittleEndian()">;
def BPFHasALU32 : Predicate<"Subtarget->getHasAlu32()">;
def BPFNoALU32 : Predicate<"!Subtarget->getHasAlu32()">;
def brtarget : Operand<OtherVT> {
let PrintMethod = "printBrTargetOperand";
}
def calltarget : Operand<i64>;
def u64imm : Operand<i64> {
let PrintMethod = "printImm64Operand";
}
def i64immSExt32 : PatLeaf<(i64 imm),
[{return isInt<32>(N->getSExtValue()); }]>;
def i32immSExt32 : PatLeaf<(i32 imm),
[{return isInt<32>(N->getSExtValue()); }]>;
// Addressing modes.
def ADDRri : ComplexPattern<i64, 2, "SelectAddr", [], []>;
def FIri : ComplexPattern<i64, 2, "SelectFIAddr", [add, or], []>;
// Address operands
def MEMri : Operand<i64> {
let PrintMethod = "printMemOperand";
let EncoderMethod = "getMemoryOpValue";
let DecoderMethod = "decodeMemoryOpValue";
let MIOperandInfo = (ops GPR, i16imm);
}
// Conditional code predicates - used for pattern matching for jump instructions
def BPF_CC_EQ : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETEQ);}]>;
def BPF_CC_NE : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETNE);}]>;
def BPF_CC_GE : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETGE);}]>;
def BPF_CC_GT : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETGT);}]>;
def BPF_CC_GTU : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETUGT);}]>;
def BPF_CC_GEU : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETUGE);}]>;
def BPF_CC_LE : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETLE);}]>;
def BPF_CC_LT : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETLT);}]>;
def BPF_CC_LTU : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETULT);}]>;
def BPF_CC_LEU : PatLeaf<(i64 imm),
[{return (N->getZExtValue() == ISD::SETULE);}]>;
// For arithmetic and jump instructions the 8-bit 'code'
// field is divided into three parts:
//
// +----------------+--------+--------------------+
// | 4 bits | 1 bit | 3 bits |
// | operation code | source | instruction class |
// +----------------+--------+--------------------+
// (MSB) (LSB)
class TYPE_ALU_JMP<bits<4> op, bits<1> srctype,
dag outs, dag ins, string asmstr, list<dag> pattern>
: InstBPF<outs, ins, asmstr, pattern> {
let Inst{63-60} = op;
let Inst{59} = srctype;
}
//For load and store instructions the 8-bit 'code' field is divided as:
//
// +--------+--------+-------------------+
// | 3 bits | 2 bits | 3 bits |
// | mode | size | instruction class |
// +--------+--------+-------------------+
// (MSB) (LSB)
class TYPE_LD_ST<bits<3> mode, bits<2> size,
dag outs, dag ins, string asmstr, list<dag> pattern>
: InstBPF<outs, ins, asmstr, pattern> {
let Inst{63-61} = mode;
let Inst{60-59} = size;
}
// jump instructions
class JMP_RR<BPFJumpOp Opc, string OpcodeStr, PatLeaf Cond>
: TYPE_ALU_JMP<Opc.Value, BPF_X.Value,
(outs),
(ins GPR:$dst, GPR:$src, brtarget:$BrDst),
"if $dst "#OpcodeStr#" $src goto $BrDst",
[(BPFbrcc i64:$dst, i64:$src, Cond, bb:$BrDst)]> {
bits<4> dst;
bits<4> src;
bits<16> BrDst;
let Inst{55-52} = src;
let Inst{51-48} = dst;
let Inst{47-32} = BrDst;
let BPFClass = BPF_JMP;
}
class JMP_RI<BPFJumpOp Opc, string OpcodeStr, PatLeaf Cond>
: TYPE_ALU_JMP<Opc.Value, BPF_K.Value,
(outs),
(ins GPR:$dst, i64imm:$imm, brtarget:$BrDst),
"if $dst "#OpcodeStr#" $imm goto $BrDst",
[(BPFbrcc i64:$dst, i64immSExt32:$imm, Cond, bb:$BrDst)]> {
bits<4> dst;
bits<16> BrDst;
bits<32> imm;
let Inst{51-48} = dst;
let Inst{47-32} = BrDst;
let Inst{31-0} = imm;
let BPFClass = BPF_JMP;
}
multiclass J<BPFJumpOp Opc, string OpcodeStr, PatLeaf Cond> {
def _rr : JMP_RR<Opc, OpcodeStr, Cond>;
def _ri : JMP_RI<Opc, OpcodeStr, Cond>;
}
let isBranch = 1, isTerminator = 1, hasDelaySlot=0 in {
// cmp+goto instructions
defm JEQ : J<BPF_JEQ, "==", BPF_CC_EQ>;
defm JUGT : J<BPF_JGT, ">", BPF_CC_GTU>;
defm JUGE : J<BPF_JGE, ">=", BPF_CC_GEU>;
defm JNE : J<BPF_JNE, "!=", BPF_CC_NE>;
defm JSGT : J<BPF_JSGT, "s>", BPF_CC_GT>;
defm JSGE : J<BPF_JSGE, "s>=", BPF_CC_GE>;
defm JULT : J<BPF_JLT, "<", BPF_CC_LTU>;
defm JULE : J<BPF_JLE, "<=", BPF_CC_LEU>;
defm JSLT : J<BPF_JSLT, "s<", BPF_CC_LT>;
defm JSLE : J<BPF_JSLE, "s<=", BPF_CC_LE>;
}
// ALU instructions
class ALU_RI<BPFOpClass Class, BPFArithOp Opc,
dag outs, dag ins, string asmstr, list<dag> pattern>
: TYPE_ALU_JMP<Opc.Value, BPF_K.Value, outs, ins, asmstr, pattern> {
bits<4> dst;
bits<32> imm;
let Inst{51-48} = dst;
let Inst{31-0} = imm;
let BPFClass = Class;
}
class ALU_RR<BPFOpClass Class, BPFArithOp Opc,
dag outs, dag ins, string asmstr, list<dag> pattern>
: TYPE_ALU_JMP<Opc.Value, BPF_X.Value, outs, ins, asmstr, pattern> {
bits<4> dst;
bits<4> src;
let Inst{55-52} = src;
let Inst{51-48} = dst;
let BPFClass = Class;
}
multiclass ALU<BPFArithOp Opc, string OpcodeStr, SDNode OpNode> {
def _rr : ALU_RR<BPF_ALU64, Opc,
(outs GPR:$dst),
(ins GPR:$src2, GPR:$src),
"$dst "#OpcodeStr#" $src",
[(set GPR:$dst, (OpNode i64:$src2, i64:$src))]>;
def _ri : ALU_RI<BPF_ALU64, Opc,
(outs GPR:$dst),
(ins GPR:$src2, i64imm:$imm),
"$dst "#OpcodeStr#" $imm",
[(set GPR:$dst, (OpNode GPR:$src2, i64immSExt32:$imm))]>;
def _rr_32 : ALU_RR<BPF_ALU, Opc,
(outs GPR32:$dst),
(ins GPR32:$src2, GPR32:$src),
"$dst "#OpcodeStr#" $src",
[(set GPR32:$dst, (OpNode i32:$src2, i32:$src))]>;
def _ri_32 : ALU_RI<BPF_ALU, Opc,
(outs GPR32:$dst),
(ins GPR32:$src2, i32imm:$imm),
"$dst "#OpcodeStr#" $imm",
[(set GPR32:$dst, (OpNode GPR32:$src2, i32immSExt32:$imm))]>;
}
let Constraints = "$dst = $src2" in {
let isAsCheapAsAMove = 1 in {
defm ADD : ALU<BPF_ADD, "+=", add>;
defm SUB : ALU<BPF_SUB, "-=", sub>;
defm OR : ALU<BPF_OR, "|=", or>;
defm AND : ALU<BPF_AND, "&=", and>;
defm SLL : ALU<BPF_LSH, "<<=", shl>;
defm SRL : ALU<BPF_RSH, ">>=", srl>;
defm XOR : ALU<BPF_XOR, "^=", xor>;
defm SRA : ALU<BPF_ARSH, "s>>=", sra>;
}
defm MUL : ALU<BPF_MUL, "*=", mul>;
defm DIV : ALU<BPF_DIV, "/=", udiv>;
}
class NEG_RR<BPFOpClass Class, BPFArithOp Opc,
dag outs, dag ins, string asmstr, list<dag> pattern>
: TYPE_ALU_JMP<Opc.Value, 0, outs, ins, asmstr, pattern> {
bits<4> dst;
let Inst{51-48} = dst;
let BPFClass = Class;
}
let Constraints = "$dst = $src", isAsCheapAsAMove = 1 in {
def NEG_64: NEG_RR<BPF_ALU64, BPF_NEG, (outs GPR:$dst), (ins GPR:$src),
"$dst = -$src",
[(set GPR:$dst, (ineg i64:$src))]>;
def NEG_32: NEG_RR<BPF_ALU, BPF_NEG, (outs GPR32:$dst), (ins GPR32:$src),
"$dst = -$src",
[(set GPR32:$dst, (ineg i32:$src))]>;
}
class LD_IMM64<bits<4> Pseudo, string OpcodeStr>
: TYPE_LD_ST<BPF_IMM.Value, BPF_DW.Value,
(outs GPR:$dst),
(ins u64imm:$imm),
"$dst "#OpcodeStr#" ${imm} ll",
[(set GPR:$dst, (i64 imm:$imm))]> {
bits<4> dst;
bits<64> imm;
let Inst{51-48} = dst;
let Inst{55-52} = Pseudo;
let Inst{47-32} = 0;
let Inst{31-0} = imm{31-0};
let BPFClass = BPF_LD;
}
let isReMaterializable = 1, isAsCheapAsAMove = 1 in {
def LD_imm64 : LD_IMM64<0, "=">;
def MOV_rr : ALU_RR<BPF_ALU64, BPF_MOV,
(outs GPR:$dst),
(ins GPR:$src),
"$dst = $src",
[]>;
def MOV_ri : ALU_RI<BPF_ALU64, BPF_MOV,
(outs GPR:$dst),
(ins i64imm:$imm),
"$dst = $imm",
[(set GPR:$dst, (i64 i64immSExt32:$imm))]>;
def MOV_rr_32 : ALU_RR<BPF_ALU, BPF_MOV,
(outs GPR32:$dst),
(ins GPR32:$src),
"$dst = $src",
[]>;
def MOV_ri_32 : ALU_RI<BPF_ALU, BPF_MOV,
(outs GPR32:$dst),
(ins i32imm:$imm),
"$dst = $imm",
[(set GPR32:$dst, (i32 i32immSExt32:$imm))]>;
}
def FI_ri
: TYPE_LD_ST<BPF_IMM.Value, BPF_DW.Value,
(outs GPR:$dst),
(ins MEMri:$addr),
"lea\t$dst, $addr",
[(set i64:$dst, FIri:$addr)]> {
// This is a tentative instruction, and will be replaced
// with MOV_rr and ADD_ri in PEI phase
let Inst{51-48} = 0;
let Inst{55-52} = 2;
let Inst{47-32} = 0;
let Inst{31-0} = 0;
let BPFClass = BPF_LD;
}
def LD_pseudo
: TYPE_LD_ST<BPF_IMM.Value, BPF_DW.Value,
(outs GPR:$dst),
(ins i64imm:$pseudo, u64imm:$imm),
"ld_pseudo\t$dst, $pseudo, $imm",
[(set GPR:$dst, (int_bpf_pseudo imm:$pseudo, imm:$imm))]> {
bits<4> dst;
bits<64> imm;
bits<4> pseudo;
let Inst{51-48} = dst;
let Inst{55-52} = pseudo;
let Inst{47-32} = 0;
let Inst{31-0} = imm{31-0};
let BPFClass = BPF_LD;
}
// STORE instructions
class STORE<BPFWidthModifer SizeOp, string OpcodeStr, list<dag> Pattern>
: TYPE_LD_ST<BPF_MEM.Value, SizeOp.Value,
(outs),
(ins GPR:$src, MEMri:$addr),
"*("#OpcodeStr#" *)($addr) = $src",
Pattern> {
bits<4> src;
bits<20> addr;
let Inst{51-48} = addr{19-16}; // base reg
let Inst{55-52} = src;
let Inst{47-32} = addr{15-0}; // offset
let BPFClass = BPF_STX;
}
class STOREi64<BPFWidthModifer Opc, string OpcodeStr, PatFrag OpNode>
: STORE<Opc, OpcodeStr, [(OpNode i64:$src, ADDRri:$addr)]>;
let Predicates = [BPFNoALU32] in {
def STW : STOREi64<BPF_W, "u32", truncstorei32>;
def STH : STOREi64<BPF_H, "u16", truncstorei16>;
def STB : STOREi64<BPF_B, "u8", truncstorei8>;
}
def STD : STOREi64<BPF_DW, "u64", store>;
// LOAD instructions
class LOAD<BPFWidthModifer SizeOp, string OpcodeStr, list<dag> Pattern>
: TYPE_LD_ST<BPF_MEM.Value, SizeOp.Value,
(outs GPR:$dst),
(ins MEMri:$addr),
"$dst = *("#OpcodeStr#" *)($addr)",
Pattern> {
bits<4> dst;
bits<20> addr;
let Inst{51-48} = dst;
let Inst{55-52} = addr{19-16};
let Inst{47-32} = addr{15-0};
let BPFClass = BPF_LDX;
}
class LOADi64<BPFWidthModifer SizeOp, string OpcodeStr, PatFrag OpNode>
: LOAD<SizeOp, OpcodeStr, [(set i64:$dst, (OpNode ADDRri:$addr))]>;
let Predicates = [BPFNoALU32] in {
def LDW : LOADi64<BPF_W, "u32", zextloadi32>;
def LDH : LOADi64<BPF_H, "u16", zextloadi16>;
def LDB : LOADi64<BPF_B, "u8", zextloadi8>;
}
def LDD : LOADi64<BPF_DW, "u64", load>;
class BRANCH<BPFJumpOp Opc, string OpcodeStr, list<dag> Pattern>
: TYPE_ALU_JMP<Opc.Value, BPF_K.Value,
(outs),
(ins brtarget:$BrDst),
!strconcat(OpcodeStr, " $BrDst"),
Pattern> {
bits<16> BrDst;
let Inst{47-32} = BrDst;
let BPFClass = BPF_JMP;
}
class CALL<string OpcodeStr>
: TYPE_ALU_JMP<BPF_CALL.Value, BPF_K.Value,
(outs),
(ins calltarget:$BrDst),
!strconcat(OpcodeStr, " $BrDst"),
[]> {
bits<32> BrDst;
let Inst{31-0} = BrDst;
let BPFClass = BPF_JMP;
}
class CALLX<string OpcodeStr>
: TYPE_ALU_JMP<BPF_CALL.Value, BPF_X.Value,
(outs),
(ins calltarget:$BrDst),
!strconcat(OpcodeStr, " $BrDst"),
[]> {
bits<32> BrDst;
let Inst{31-0} = BrDst;
let BPFClass = BPF_JMP;
}
// Jump always
let isBranch = 1, isTerminator = 1, hasDelaySlot=0, isBarrier = 1 in {
def JMP : BRANCH<BPF_JA, "goto", [(br bb:$BrDst)]>;
}
// Jump and link
let isCall=1, hasDelaySlot=0, Uses = [R11],
// Potentially clobbered registers
Defs = [R0, R1, R2, R3, R4, R5] in {
def JAL : CALL<"call">;
def JALX : CALLX<"callx">;
}
class NOP_I<string OpcodeStr>
: TYPE_ALU_JMP<BPF_MOV.Value, BPF_X.Value,
(outs),
(ins i32imm:$imm),
!strconcat(OpcodeStr, "\t$imm"),
[]> {
// mov r0, r0 == nop
let Inst{55-52} = 0;
let Inst{51-48} = 0;
let BPFClass = BPF_ALU64;
}
let hasSideEffects = 0 in
def NOP : NOP_I<"nop">;
class RET<string OpcodeStr>
: TYPE_ALU_JMP<BPF_EXIT.Value, BPF_K.Value,
(outs),
(ins),
!strconcat(OpcodeStr, ""),
[(BPFretflag)]> {
let Inst{31-0} = 0;
let BPFClass = BPF_JMP;
}
let isReturn = 1, isTerminator = 1, hasDelaySlot=0, isBarrier = 1,
isNotDuplicable = 1 in {
def RET : RET<"exit">;
}
// ADJCALLSTACKDOWN/UP pseudo insns
let Defs = [R11], Uses = [R11], isCodeGenOnly = 1 in {
def ADJCALLSTACKDOWN : Pseudo<(outs), (ins i64imm:$amt1, i64imm:$amt2),
"#ADJCALLSTACKDOWN $amt1 $amt2",
[(BPFcallseq_start timm:$amt1, timm:$amt2)]>;
def ADJCALLSTACKUP : Pseudo<(outs), (ins i64imm:$amt1, i64imm:$amt2),
"#ADJCALLSTACKUP $amt1 $amt2",
[(BPFcallseq_end timm:$amt1, timm:$amt2)]>;
}
let usesCustomInserter = 1, isCodeGenOnly = 1 in {
def Select : Pseudo<(outs GPR:$dst),
(ins GPR:$lhs, GPR:$rhs, i64imm:$imm, GPR:$src, GPR:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i64:$dst,
(BPFselectcc i64:$lhs, i64:$rhs, (i64 imm:$imm), i64:$src, i64:$src2))]>;
def Select_Ri : Pseudo<(outs GPR:$dst),
(ins GPR:$lhs, i64imm:$rhs, i64imm:$imm, GPR:$src, GPR:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i64:$dst,
(BPFselectcc i64:$lhs, (i64immSExt32:$rhs), (i64 imm:$imm), i64:$src, i64:$src2))]>;
def Select_64_32 : Pseudo<(outs GPR32:$dst),
(ins GPR:$lhs, GPR:$rhs, i64imm:$imm, GPR32:$src, GPR32:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i32:$dst,
(BPFselectcc i64:$lhs, i64:$rhs, (i64 imm:$imm), i32:$src, i32:$src2))]>;
def Select_Ri_64_32 : Pseudo<(outs GPR32:$dst),
(ins GPR:$lhs, i64imm:$rhs, i64imm:$imm, GPR32:$src, GPR32:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i32:$dst,
(BPFselectcc i64:$lhs, (i64immSExt32:$rhs), (i64 imm:$imm), i32:$src, i32:$src2))]>;
def Select_32 : Pseudo<(outs GPR32:$dst),
(ins GPR32:$lhs, GPR32:$rhs, i32imm:$imm, GPR32:$src, GPR32:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i32:$dst,
(BPFselectcc i32:$lhs, i32:$rhs, (i32 imm:$imm), i32:$src, i32:$src2))]>;
def Select_Ri_32 : Pseudo<(outs GPR32:$dst),
(ins GPR32:$lhs, i32imm:$rhs, i32imm:$imm, GPR32:$src, GPR32:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i32:$dst,
(BPFselectcc i32:$lhs, (i32immSExt32:$rhs), (i32 imm:$imm), i32:$src, i32:$src2))]>;
def Select_32_64 : Pseudo<(outs GPR:$dst),
(ins GPR32:$lhs, GPR32:$rhs, i32imm:$imm, GPR:$src, GPR:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i64:$dst,
(BPFselectcc i32:$lhs, i32:$rhs, (i32 imm:$imm), i64:$src, i64:$src2))]>;
def Select_Ri_32_64 : Pseudo<(outs GPR:$dst),
(ins GPR32:$lhs, i32imm:$rhs, i32imm:$imm, GPR:$src, GPR:$src2),
"# Select PSEUDO $dst = $lhs $imm $rhs ? $src : $src2",
[(set i64:$dst,
(BPFselectcc i32:$lhs, (i32immSExt32:$rhs), (i32 imm:$imm), i64:$src, i64:$src2))]>;
}
// load 64-bit global addr into register
def : Pat<(BPFWrapper tglobaladdr:$in), (LD_imm64 tglobaladdr:$in)>;
// 0xffffFFFF doesn't fit into simm32, optimize common case
def : Pat<(i64 (and (i64 GPR:$src), 0xffffFFFF)),
(SRL_ri (SLL_ri (i64 GPR:$src), 32), 32)>;
// Calls
def : Pat<(BPFcall tglobaladdr:$dst), (JAL tglobaladdr:$dst)>;
def : Pat<(BPFcall texternalsym:$dst), (JAL texternalsym:$dst)>;
def : Pat<(BPFcall imm:$dst), (JAL imm:$dst)>;
def : Pat<(BPFcall GPR:$dst), (JALX GPR:$dst)>;
// Loads
let Predicates = [BPFNoALU32] in {
def : Pat<(i64 (extloadi8 ADDRri:$src)), (i64 (LDB ADDRri:$src))>;
def : Pat<(i64 (extloadi16 ADDRri:$src)), (i64 (LDH ADDRri:$src))>;
def : Pat<(i64 (extloadi32 ADDRri:$src)), (i64 (LDW ADDRri:$src))>;
}
// Atomics
class XADD<BPFWidthModifer SizeOp, string OpcodeStr, PatFrag OpNode>
: TYPE_LD_ST<BPF_XADD.Value, SizeOp.Value,
(outs GPR:$dst),
(ins MEMri:$addr, GPR:$val),
"lock *("#OpcodeStr#" *)($addr) += $val",
[(set GPR:$dst, (OpNode ADDRri:$addr, GPR:$val))]> {
bits<4> dst;
bits<20> addr;
let Inst{51-48} = addr{19-16}; // base reg
let Inst{55-52} = dst;
let Inst{47-32} = addr{15-0}; // offset
let BPFClass = BPF_STX;
}
let Constraints = "$dst = $val" in {
def XADD32 : XADD<BPF_W, "u32", atomic_load_add_32>;
def XADD64 : XADD<BPF_DW, "u64", atomic_load_add_64>;
// undefined def XADD16 : XADD<1, "xadd16", atomic_load_add_16>;
// undefined def XADD8 : XADD<2, "xadd8", atomic_load_add_8>;
}
// bswap16, bswap32, bswap64
class BSWAP<bits<32> SizeOp, string OpcodeStr, BPFSrcType SrcType, list<dag> Pattern>
: TYPE_ALU_JMP<BPF_END.Value, SrcType.Value,
(outs GPR:$dst),
(ins GPR:$src),
"$dst = "#OpcodeStr#" $src",
Pattern> {
bits<4> dst;
let Inst{51-48} = dst;
let Inst{31-0} = SizeOp;
let BPFClass = BPF_ALU;
}
let Constraints = "$dst = $src" in {
let Predicates = [BPFIsLittleEndian] in {
def BE16 : BSWAP<16, "be16", BPF_TO_BE, [(set GPR:$dst, (srl (bswap GPR:$src), (i64 48)))]>;
def BE32 : BSWAP<32, "be32", BPF_TO_BE, [(set GPR:$dst, (srl (bswap GPR:$src), (i64 32)))]>;
def BE64 : BSWAP<64, "be64", BPF_TO_BE, [(set GPR:$dst, (bswap GPR:$src))]>;
}
let Predicates = [BPFIsBigEndian] in {
def LE16 : BSWAP<16, "le16", BPF_TO_LE, [(set GPR:$dst, (srl (bswap GPR:$src), (i64 48)))]>;
def LE32 : BSWAP<32, "le32", BPF_TO_LE, [(set GPR:$dst, (srl (bswap GPR:$src), (i64 32)))]>;
def LE64 : BSWAP<64, "le64", BPF_TO_LE, [(set GPR:$dst, (bswap GPR:$src))]>;
}
}
let Defs = [R0, R1, R2, R3, R4, R5], Uses = [R6], hasSideEffects = 1,
hasExtraDefRegAllocReq = 1, hasExtraSrcRegAllocReq = 1, mayLoad = 1 in {
class LOAD_ABS<BPFWidthModifer SizeOp, string OpcodeStr, Intrinsic OpNode>
: TYPE_LD_ST<BPF_ABS.Value, SizeOp.Value,
(outs),
(ins GPR:$skb, i64imm:$imm),
"r0 = *("#OpcodeStr#" *)skb[$imm]",
[(set R0, (OpNode GPR:$skb, i64immSExt32:$imm))]> {
bits<32> imm;
let Inst{31-0} = imm;
let BPFClass = BPF_LD;
}
class LOAD_IND<BPFWidthModifer SizeOp, string OpcodeStr, Intrinsic OpNode>
: TYPE_LD_ST<BPF_IND.Value, SizeOp.Value,
(outs),
(ins GPR:$skb, GPR:$val),
"r0 = *("#OpcodeStr#" *)skb[$val]",
[(set R0, (OpNode GPR:$skb, GPR:$val))]> {
bits<4> val;
let Inst{55-52} = val;
let BPFClass = BPF_LD;
}
}
def LD_ABS_B : LOAD_ABS<BPF_B, "u8", int_bpf_load_byte>;
def LD_ABS_H : LOAD_ABS<BPF_H, "u16", int_bpf_load_half>;
def LD_ABS_W : LOAD_ABS<BPF_W, "u32", int_bpf_load_word>;
def LD_IND_B : LOAD_IND<BPF_B, "u8", int_bpf_load_byte>;
def LD_IND_H : LOAD_IND<BPF_H, "u16", int_bpf_load_half>;
def LD_IND_W : LOAD_IND<BPF_W, "u32", int_bpf_load_word>;
let isCodeGenOnly = 1 in {
def MOV_32_64 : ALU_RR<BPF_ALU, BPF_MOV,
(outs GPR:$dst), (ins GPR32:$src),
"$dst = $src", []>;
}
def : Pat<(i64 (sext GPR32:$src)),
(SRA_ri (SLL_ri (MOV_32_64 GPR32:$src), 32), 32)>;
def : Pat<(i64 (zext GPR32:$src)),
(SRL_ri (SLL_ri (MOV_32_64 GPR32:$src), 32), 32)>;
// For i64 -> i32 truncation, use the 32-bit subregister directly.
def : Pat<(i32 (trunc GPR:$src)),
(i32 (EXTRACT_SUBREG GPR:$src, sub_32))>;
// For i32 -> i64 anyext, we don't care about the high bits.
def : Pat<(i64 (anyext GPR32:$src)),
(INSERT_SUBREG (i64 (IMPLICIT_DEF)), GPR32:$src, sub_32)>;
class STORE32<BPFWidthModifer SizeOp, string OpcodeStr, list<dag> Pattern>
: TYPE_LD_ST<BPF_MEM.Value, SizeOp.Value,
(outs),
(ins GPR32:$src, MEMri:$addr),
"*("#OpcodeStr#" *)($addr) = $src",
Pattern> {
bits<4> src;
bits<20> addr;
let Inst{51-48} = addr{19-16}; // base reg
let Inst{55-52} = src;
let Inst{47-32} = addr{15-0}; // offset
let BPFClass = BPF_STX;
}
class STOREi32<BPFWidthModifer Opc, string OpcodeStr, PatFrag OpNode>
: STORE32<Opc, OpcodeStr, [(OpNode i32:$src, ADDRri:$addr)]>;
let Predicates = [BPFHasALU32], DecoderNamespace = "BPFALU32" in {
def STW32 : STOREi32<BPF_W, "u32", store>;
def STH32 : STOREi32<BPF_H, "u16", truncstorei16>;
def STB32 : STOREi32<BPF_B, "u8", truncstorei8>;
}
class LOAD32<BPFWidthModifer SizeOp, string OpcodeStr, list<dag> Pattern>
: TYPE_LD_ST<BPF_MEM.Value, SizeOp.Value,
(outs GPR32:$dst),
(ins MEMri:$addr),
"$dst = *("#OpcodeStr#" *)($addr)",
Pattern> {
bits<4> dst;
bits<20> addr;
let Inst{51-48} = dst;
let Inst{55-52} = addr{19-16};
let Inst{47-32} = addr{15-0};
let BPFClass = BPF_LDX;
}
class LOADi32<BPFWidthModifer SizeOp, string OpcodeStr, PatFrag OpNode>
: LOAD32<SizeOp, OpcodeStr, [(set i32:$dst, (OpNode ADDRri:$addr))]>;
let Predicates = [BPFHasALU32], DecoderNamespace = "BPFALU32" in {
def LDW32 : LOADi32<BPF_W, "u32", load>;
def LDH32 : LOADi32<BPF_H, "u16", zextloadi16>;
def LDB32 : LOADi32<BPF_B, "u8", zextloadi8>;
}
let Predicates = [BPFHasALU32] in {
def : Pat<(truncstorei8 GPR:$src, ADDRri:$dst),
(STB32 (EXTRACT_SUBREG GPR:$src, sub_32), ADDRri:$dst)>;
def : Pat<(truncstorei16 GPR:$src, ADDRri:$dst),
(STH32 (EXTRACT_SUBREG GPR:$src, sub_32), ADDRri:$dst)>;
def : Pat<(truncstorei32 GPR:$src, ADDRri:$dst),
(STW32 (EXTRACT_SUBREG GPR:$src, sub_32), ADDRri:$dst)>;
def : Pat<(i32 (extloadi8 ADDRri:$src)), (i32 (LDB32 ADDRri:$src))>;
def : Pat<(i32 (extloadi16 ADDRri:$src)), (i32 (LDH32 ADDRri:$src))>;
def : Pat<(i64 (zextloadi8 ADDRri:$src)),
(SUBREG_TO_REG (i64 0), (LDB32 ADDRri:$src), sub_32)>;
def : Pat<(i64 (zextloadi16 ADDRri:$src)),
(SUBREG_TO_REG (i64 0), (LDH32 ADDRri:$src), sub_32)>;
def : Pat<(i64 (zextloadi32 ADDRri:$src)),
(SUBREG_TO_REG (i64 0), (LDW32 ADDRri:$src), sub_32)>;
def : Pat<(i64 (extloadi8 ADDRri:$src)),
(SUBREG_TO_REG (i64 0), (LDB32 ADDRri:$src), sub_32)>;
def : Pat<(i64 (extloadi16 ADDRri:$src)),
(SUBREG_TO_REG (i64 0), (LDH32 ADDRri:$src), sub_32)>;
def : Pat<(i64 (extloadi32 ADDRri:$src)),
(SUBREG_TO_REG (i64 0), (LDW32 ADDRri:$src), sub_32)>;
}
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