2a586a8118
It can never be reached. It could be reached if we emitted an opcode that could fall outside the outermost scope, but emission of all such opcodes is guarded by `!isOutermostScope()`. That also means we never add fixups to the outermost scope, so avoid pushing an entry for it onto the stack.
67 lines
2.4 KiB
TableGen
67 lines
2.4 KiB
TableGen
// RUN: llvm-tblgen -gen-disassembler -I %p/../../../include %s | FileCheck %s
|
|
|
|
include "llvm/Target/Target.td"
|
|
|
|
class Enc {
|
|
int Size = 2;
|
|
bits<16> Inst;
|
|
}
|
|
|
|
class EncSHIFT<bits<2> opc> : Enc {
|
|
bits<6> shamt;
|
|
let Inst{15...14} = {0, 0};
|
|
let Inst{13...12} = opc;
|
|
let Inst{11...6} = shamt;
|
|
}
|
|
|
|
class EncNOP<bits<2> opc> : Enc {
|
|
let Inst{15...14} = {0, 0};
|
|
let Inst{13...12} = opc;
|
|
let Inst{11...6} = {0, 0, 0, 0, 0, 0};
|
|
}
|
|
|
|
def ShAmtOp : Operand<i32> {
|
|
let DecoderMethod = "decodeShAmt";
|
|
let hasCompleteDecoder = false;
|
|
}
|
|
|
|
class I<dag out_ops, dag in_ops> : Instruction {
|
|
let InOperandList = in_ops;
|
|
let OutOperandList = out_ops;
|
|
}
|
|
|
|
// CHECK: /* 0 */ MCD::OPC_ExtractField, 12, 4, // Inst{15-12} ...
|
|
// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValue, 0, 14, 0, // Skip to: 21
|
|
// CHECK-NEXT: /* 7 */ MCD::OPC_CheckField, 6, 6, 0, 4, 0, // Skip to: 17
|
|
// CHECK-NEXT: /* 13 */ MCD::OPC_Decode, {{[0-9]+}}, 2, 0, // Opcode: {{.*}}:NOP
|
|
// CHECK-NEXT: /* 17 */ MCD::OPC_TryDecodeOrFail, {{[0-9]+}}, 2, 1,
|
|
// CHECK-NEXT: /* 21 */ MCD::OPC_FilterValue, 1, 14, 0, // Skip to: 39
|
|
// CHECK-NEXT: /* 25 */ MCD::OPC_CheckField, 6, 6, 0, 4, 0, // Skip to: 35
|
|
// CHECK-NEXT: /* 31 */ MCD::OPC_Decode, {{[0-9]+}}, 2, 0, // Opcode: {{.*}}:NOP
|
|
// CHECK-NEXT: /* 35 */ MCD::OPC_TryDecodeOrFail, {{[0-9]+}}, 2, 1,
|
|
// CHECK-NEXT: /* 39 */ MCD::OPC_FilterValue, 2, 14, 0, // Skip to: 57
|
|
// CHECK-NEXT: /* 43 */ MCD::OPC_CheckField, 6, 6, 0, 4, 0, // Skip to: 53
|
|
// CHECK-NEXT: /* 49 */ MCD::OPC_Decode, {{[0-9]+}}, 2, 0, // Opcode: {{.*}}:NOP
|
|
// CHECK-NEXT: /* 53 */ MCD::OPC_TryDecodeOrFail, {{[0-9]+}}, 2, 1,
|
|
// CHECK-NEXT: /* 57 */ MCD::OPC_FilterValueOrFail, 3,
|
|
// CHECK-NEXT: /* 59 */ MCD::OPC_CheckField, 6, 6, 0, 4, 0, // Skip to: 69
|
|
// CHECK-NEXT: /* 65 */ MCD::OPC_Decode, {{[0-9]+}}, 2, 0, // Opcode: {{.*}}:NOP
|
|
// CHECK-NEXT: /* 69 */ MCD::OPC_TryDecodeOrFail, {{[0-9]+}}, 2, 1,
|
|
|
|
class SHIFT<bits<2> opc> : I<(outs), (ins ShAmtOp:$shamt)>, EncSHIFT<opc>;
|
|
def SHIFT0 : SHIFT<0>;
|
|
def SHIFT1 : SHIFT<1>;
|
|
def SHIFT2 : SHIFT<2>;
|
|
def SHIFT3 : SHIFT<3>;
|
|
|
|
def NOP : I<(outs), (ins)>, EncNOP<0>;
|
|
def : AdditionalEncoding<NOP>, EncNOP<1>;
|
|
def : AdditionalEncoding<NOP>, EncNOP<2>;
|
|
def : AdditionalEncoding<NOP>, EncNOP<3>;
|
|
|
|
def II : InstrInfo;
|
|
|
|
def MyTarget : Target {
|
|
let InstructionSet = II;
|
|
}
|