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44 lines
1.4 KiB
TableGen
44 lines
1.4 KiB
TableGen
// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | FileCheck %s
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// Check that if decoding of an instruction fails and the instruction does not
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// have a complete decoder method that can determine if the bitpattern is valid
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// or not then the decoder tries to find a more general instruction that
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// matches the bitpattern too.
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include "llvm/Target/Target.td"
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def archInstrInfo : InstrInfo { }
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def arch : Target {
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let InstructionSet = archInstrInfo;
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}
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class TestInstruction : Instruction {
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let Size = 1;
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let OutOperandList = (outs);
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let InOperandList = (ins);
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field bits<8> Inst;
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field bits<8> SoftFail = 0;
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}
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def InstA : TestInstruction {
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let Inst = {0,0,0,0,?,?,?,?};
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let AsmString = "InstA";
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}
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def InstB : TestInstruction {
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let Inst = {0,0,0,0,0,0,?,?};
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let AsmString = "InstB";
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let DecoderMethod = "DecodeInstB";
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let hasCompleteDecoder = 0;
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}
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// CHECK: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
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// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValue, 0, 14, 0, // Skip to: 21
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// CHECK-NEXT: /* 7 */ MCD::OPC_CheckField, 2, 2, 0, 5, 0, // Skip to: 18
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// CHECK-NEXT: /* 13 */ MCD::OPC_TryDecode, 28, 0, 0, 0, // Opcode: InstB, skip to: 18
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// CHECK-NEXT: /* 18 */ MCD::OPC_Decode, 27, 1, // Opcode: InstA
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// CHECK-NEXT: /* 21 */ MCD::OPC_Fail,
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// CHECK: if (DecodeInstB(MI, insn, Address, Decoder) == MCDisassembler::Fail) { DecodeComplete = false; return MCDisassembler::Fail; }
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