9a26f89316
Currently the DecoderEmitter constructor takes a bunch of string parameters containing bits of code to interpolate. However, there's only two ways it can be called. The one used for most targets which doesn't handle the SoftFail DecoderStatus (not a problem, because they don't use SoftFail). The other mode, which is used for ARM/AArch64, does handle SoftFail, but requires an externally defined helper function in those targets. This is unnecessary complication; remove the parameters, and unify onto a single version which does support SoftFail, defining the helper itself.
44 lines
1.4 KiB
TableGen
44 lines
1.4 KiB
TableGen
// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | FileCheck %s
|
|
|
|
// Check that if decoding of an instruction fails and the instruction does not
|
|
// have a complete decoder method that can determine if the bitpattern is valid
|
|
// or not then the decoder tries to find a more general instruction that
|
|
// matches the bitpattern too.
|
|
|
|
include "llvm/Target/Target.td"
|
|
|
|
def archInstrInfo : InstrInfo { }
|
|
|
|
def arch : Target {
|
|
let InstructionSet = archInstrInfo;
|
|
}
|
|
|
|
class TestInstruction : Instruction {
|
|
let Size = 1;
|
|
let OutOperandList = (outs);
|
|
let InOperandList = (ins);
|
|
field bits<8> Inst;
|
|
field bits<8> SoftFail = 0;
|
|
}
|
|
|
|
def InstA : TestInstruction {
|
|
let Inst = {0,0,0,0,?,?,?,?};
|
|
let AsmString = "InstA";
|
|
}
|
|
|
|
def InstB : TestInstruction {
|
|
let Inst = {0,0,0,0,0,0,?,?};
|
|
let AsmString = "InstB";
|
|
let DecoderMethod = "DecodeInstB";
|
|
let hasCompleteDecoder = 0;
|
|
}
|
|
|
|
// CHECK: /* 0 */ MCD::OPC_ExtractField, 4, 4, // Inst{7-4} ...
|
|
// CHECK-NEXT: /* 3 */ MCD::OPC_FilterValue, 0, 18, 0, 0, // Skip to: 26
|
|
// CHECK-NEXT: /* 8 */ MCD::OPC_CheckField, 2, 2, 0, 7, 0, 0, // Skip to: 22
|
|
// CHECK-NEXT: /* 15 */ MCD::OPC_TryDecode, {{[0-9]+}}, 1, 0, 0, 0, 0, // Opcode: InstB, skip to: 22
|
|
// CHECK-NEXT: /* 22 */ MCD::OPC_Decode, {{[0-9]+}}, 1, 1, // Opcode: InstA
|
|
// CHECK-NEXT: /* 26 */ MCD::OPC_Fail,
|
|
|
|
// CHECK: if (!Check(S, DecodeInstB(MI, insn, Address, Decoder))) { DecodeComplete = false; return MCDisassembler::Fail; }
|