HwModeEncodeDecode.td
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// RUN: llvm-tblgen -gen-emitter -I %p/../../include %s | FileCheck %s --check-prefix=ENCODER
// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | FileCheck %s --check-prefix=DECODER
include "llvm/Target/Target.td"
def archInstrInfo : InstrInfo { }
def arch : Target {
let InstructionSet = archInstrInfo;
}
def Myi32 : Operand<i32> {
let DecoderMethod = "DecodeMyi32";
}
def ModeA : HwMode<"+a">;
def ModeB : HwMode<"+b">;
def fooTypeEncA : InstructionEncoding {
let Size = 4;
field bits<32> SoftFail = 0;
bits<32> Inst;
bits<8> factor;
let Inst{7...0} = factor;
let Inst{3...2} = 0b11;
let Inst{1...0} = 0b00;
}
def fooTypeEncB : InstructionEncoding {
let Size = 4;
field bits<32> SoftFail = 0;
bits<32> Inst;
bits<8> factor;
let Inst{15...8} = factor;
let Inst{1...0} = 0b11;
}
let OutOperandList = (outs) in {
def foo : Instruction {
let InOperandList = (ins i32imm:$factor);
let EncodingInfos = EncodingByHwMode<
[ModeA, ModeB], [fooTypeEncA,
fooTypeEncB]
>;
let AsmString = "foo $factor";
}
def bar: Instruction {
let InOperandList = (ins i32imm:$factor);
let Size = 4;
bits<32> Inst;
bits<32> SoftFail;
bits<8> factor;
let Inst{31...24} = factor;
let Inst{1...0} = 0b10;
let AsmString = "bar $factor";
}
def baz : Instruction {
let InOperandList = (ins i32imm:$factor);
bits<32> Inst;
let EncodingInfos = EncodingByHwMode<
[ModeB], [fooTypeEncA]
>;
let AsmString = "foo $factor";
}
}
// DECODER-LABEL: DecoderTable_ModeA32[] =
// DECODER-DAG: Opcode: fooTypeEncA:foo
// DECODER-DAG: Opcode: bar
// DECODER-LABEL: DecoderTable_ModeB32[] =
// Note that the comment says fooTypeEncA but this is actually fooTypeEncB; plumbing
// the correct comment text through the decoder is nontrivial.
// DECODER-DAG: Opcode: fooTypeEncA:foo
// DECODER-DAG: Opcode: bar
// ENCODER-LABEL: static const uint64_t InstBits_ModeA[] = {
// ENCODER: UINT64_C(2), // bar
// ENCODER: UINT64_C(12), // foo
// ENCODER-LABEL: static const uint64_t InstBits_ModeB[] = {
// ENCODER: UINT64_C(2), // bar
// ENCODER: UINT64_C(3), // foo
// ENCODER: case ::foo: {
// ENCODER: switch (HwMode) {
// ENCODER: default: llvm_unreachable("Unhandled HwMode");
// ENCODER: case 1: {