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// RUN: llvm-tblgen -gen-emitter -I %p/../../include %s | \
// RUN: FileCheck %s --check-prefix=ENCODER
// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | \
// RUN: FileCheck %s --check-prefix=DECODER
// RUN: llvm-tblgen -gen-disassembler --suppress-per-hwmode-duplicates=O1 -I \
// RUN: %p/../../include %s | FileCheck %s --check-prefix=DECODER-SUPPRESS-O1
// RUN: llvm-tblgen -gen-disassembler --suppress-per-hwmode-duplicates=O2 -I \
// RUN: %p/../../include %s | FileCheck %s --check-prefix=DECODER-SUPPRESS-O2
include "llvm/Target/Target.td"
def archInstrInfo : InstrInfo { }
def arch : Target {
let InstructionSet = archInstrInfo;
}
def Myi32 : Operand<i32> {
let DecoderMethod = "DecodeMyi32";
}
def HasA : Predicate<"Subtarget->hasA()">;
def HasB : Predicate<"Subtarget->hasB()">;
def ModeA : HwMode<"+a", [HasA]>; // Mode 1
def ModeB : HwMode<"+b", [HasB]>; // Mode 2
def ModeC : HwMode<"+c", []>; // Mode 3
def fooTypeEncDefault : InstructionEncoding {
let Size = 8;
field bits<64> SoftFail = 0;
bits<64> Inst;
bits<8> factor;
let Inst{7...0} = factor;
let Inst{3...2} = 0b10;
let Inst{1...0} = 0b00;
}
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;
}
def fooTypeEncC : InstructionEncoding {
let Size = 4;
field bits<32> SoftFail = 0;
bits<32> Inst;
bits<8> factor;
let Inst{31...24} = factor;
let Inst{23...21} = 0b110;
let Inst{1...0} = 0b11;
}
// Test for DefaultMode as a selector.
def foo : Instruction {
let OutOperandList = (outs);
let InOperandList = (ins i32imm:$factor);
let EncodingInfos = EncodingByHwMode<
[ModeC, ModeA, ModeB, DefaultMode],
[fooTypeEncC, fooTypeEncA, fooTypeEncB, fooTypeEncDefault]>;
let AsmString = "foo $factor";
}
def bar: Instruction {
let OutOperandList = (outs);
let InOperandList = (ins i32imm:$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 $factor";
}
def baz : Instruction {
let OutOperandList = (outs);
let InOperandList = (ins i32imm:$factor);
bits<32> Inst;
let EncodingInfos = EncodingByHwMode<
[ModeB], [fooTypeEncA]
>;
let AsmString = "foo $factor";
}
def unrelated: Instruction {
let OutOperandList = (outs);
let DecoderNamespace = "Alt";
let InOperandList = (ins i32imm:$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 = "unrelated $factor";
}
// Under default settings, using 'HwMode' to dictate instruction encodings results in
// significant duplication of DecoderTables. The four tables ‘DecoderTableAlt32’,
// ‘DecoderTableAlt_ModeA32’, ‘DecoderTableAlt_ModeB32’ and 'DecoderTable_ModeC32' are
// exact duplicates and could effectively be merged into one.
// DECODER-LABEL: DecoderTable32[] =
// DECODER-DAG: Opcode: bar
// DECODER-LABEL: DecoderTable64[] =
// DECODER-DAG: Opcode: fooTypeEncDefault:foo
// DECODER-LABEL: DecoderTableAlt32[] =
// DECODER-DAG: Opcode: unrelated
// DECODER-LABEL: DecoderTableAlt_ModeA32[] =
// DECODER-DAG: Opcode: unrelated
// DECODER-LABEL: DecoderTableAlt_ModeB32[] =
// DECODER-DAG: Opcode: unrelated
// DECODER-LABEL: DecoderTableAlt_ModeC32[] =
// DECODER-DAG: Opcode: unrelated
// DECODER-LABEL: DecoderTable_ModeA32[] =
// DECODER-DAG: Opcode: fooTypeEncA:foo
// DECODER-DAG: Opcode: bar
// DECODER-LABEL: DecoderTable_ModeB32[] =
// DECODER-DAG: Opcode: fooTypeEncB:foo
// DECODER-DAG: Opcode: fooTypeEncA:baz
// DECODER-DAG: Opcode: bar
// DECODER-LABEL: DecoderTable_ModeC32[] =
// DECODER-DAG: Opcode: fooTypeEncC:foo
// DECODER-DAG: Opcode: bar
// Under the 'O1' optimization level, unnecessary duplicate tables will be eliminated,
// reducing the four ‘Alt’ tables down to just one.
// DECODER-SUPPRESS-O1-LABEL: DecoderTable32[] =
// DECODER-SUPPRESS-O1-DAG: Opcode: bar
// DECODER-SUPPRESS-O1-LABEL: DecoderTable64[] =
// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncDefault:foo
// DECODER-SUPPRESS-O1-LABEL: DecoderTableAlt32[] =
// DECODER-SUPPRESS-O1-DAG: Opcode: unrelated
// DECODER-SUPPRESS-O1-LABEL: DecoderTable_ModeA32[] =
// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncA:foo
// DECODER-SUPPRESS-O1-DAG: Opcode: bar
// DECODER-SUPPRESS-O1-LABEL: DecoderTable_ModeB32[] =
// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncB:foo
// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncA:baz
// DECODER-SUPPRESS-O1-DAG: Opcode: bar
// DECODER-SUPPRESS-O1-LABEL: DecoderTable_ModeC32[] =
// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncC:foo
// DECODER-SUPPRESS-O1-DAG: Opcode: bar
// Under the 'O2' optimization condition, instructions possessing the 'EncodingByHwMode'
// attribute will be extracted from their original DecoderNamespace and placed into their
// respective HwMode tables. Meanwhile, other instructions that do not have the 'EncodingByHwMode'
// attribute but are within the same DecoderNamespace will be stored in the 'Default' table. This
// approach will significantly reduce instruction redundancy, but it necessitates users to thoroughly
// consider the interplay between HwMode and DecoderNamespace for their instructions.
// DECODER-SUPPRESS-O2-LABEL: DecoderTable32[] =
// DECODER-SUPPRESS-O2-DAG: Opcode: bar
// DECODER-SUPPRESS-O2-LABEL: DecoderTable64[] =
// DECODER-SUPPRESS-O2-NOT: Opcode: bar
// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncDefault:foo
// DECODER-SUPPRESS-O2-LABEL: DecoderTableAlt32[] =
// DECODER-SUPPRESS-O2-DAG: Opcode: unrelated
// DECODER-SUPPRESS-O2-LABEL: DecoderTable_ModeA32[] =
// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncA:foo
// DECODER-SUPPRESS-O2-NOT: Opcode: bar
// DECODER-SUPPRESS-O2-LABEL: DecoderTable_ModeB32[] =
// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncB:foo
// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncA:baz
// DECODER-SUPPRESS-O2-NOT: Opcode: bar
// DECODER-SUPPRESS-O2-LABEL: DecoderTable_ModeC32[] =
// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncC:foo
// DECODER-SUPPRESS-O2-NOT: Opcode: bar
// For 'bar' and 'unrelated', we didn't assign any HwModes for them,
// they should keep the same in the following four tables.
// For 'foo' we assigned four HwModes( includes 'DefaultMode' ),
// it's encodings should be different in the following four tables.
// For 'baz' we only assigned ModeB for it, so it will be presented
// as '0' in the tables of ModeA, ModeC and Default Mode.
// ENCODER-LABEL: static const uint64_t InstBits[] = {
// ENCODER: UINT64_C(2), // bar
// ENCODER: UINT64_C(0), // baz
// ENCODER: UINT64_C(8), // foo
// ENCODER: UINT64_C(2), // unrelated
// ENCODER-LABEL: static const uint64_t InstBits_ModeA[] = {
// ENCODER: UINT64_C(2), // bar
// ENCODER: UINT64_C(0), // baz
// ENCODER: UINT64_C(12), // foo
// ENCODER: UINT64_C(2), // unrelated
// ENCODER-LABEL: static const uint64_t InstBits_ModeB[] = {
// ENCODER: UINT64_C(2), // bar
// ENCODER: UINT64_C(12), // baz
// ENCODER: UINT64_C(3), // foo
// ENCODER: UINT64_C(2), // unrelated
// ENCODER-LABEL: static const uint64_t InstBits_ModeC[] = {
// ENCODER: UINT64_C(2), // bar
// ENCODER: UINT64_C(0), // baz
// ENCODER: UINT64_C(12582915), // foo
// ENCODER: UINT64_C(2), // unrelated
// ENCODER-LABEL: case ::bar:
// ENCODER-LABEL: case ::unrelated:
// ENCODER-NOT: getHwMode
// ENCODER-LABEL: case ::foo: {
// ENCODER: unsigned HwMode = STI.getHwMode(MCSubtargetInfo::HwMode_EncodingInfo);
// ENCODER: switch (HwMode) {
// ENCODER: default: llvm_unreachable("Unknown hardware mode!"); break;
// ENCODER: case 0: InstBitsByHw = InstBits; break;
// ENCODER: case 1: InstBitsByHw = InstBits_ModeA; break;
// ENCODER: case 2: InstBitsByHw = InstBits_ModeB; break;
// ENCODER: case 3: InstBitsByHw = InstBits_ModeC; break;
// ENCODER: };
// ENCODER: Value = InstBitsByHw[opcode];
// ENCODER: switch (HwMode) {
// ENCODER: default: llvm_unreachable("Unhandled HwMode");
// ENCODER: case 0: {
// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
// ENCODER: op &= UINT64_C(240);
// ENCODER: Value |= op;
// ENCODER: break;
// ENCODER: }
// ENCODER: case 1: {
// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
// ENCODER: op &= UINT64_C(240);
// ENCODER: Value |= op;
// ENCODER: break;
// ENCODER: }
// ENCODER: case 2: {
// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
// ENCODER: op &= UINT64_C(255);
// ENCODER: op <<= 8;
// ENCODER: Value |= op;
// ENCODER: break;
// ENCODER: }
// ENCODER: case 3: {
// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
// ENCODER: op &= UINT64_C(255);
// ENCODER: op <<= 24;
// ENCODER: Value |= op;
// ENCODER: break;
// ENCODER: }
// ENCODER-LABEL: case ::baz: {
// ENCODER: unsigned HwMode = STI.getHwMode(MCSubtargetInfo::HwMode_EncodingInfo);
// ENCODER: switch (HwMode) {
// ENCODER: default: llvm_unreachable("Unknown hardware mode!"); break;
// ENCODER: case 2: InstBitsByHw = InstBits_ModeB; break;
// ENCODER: };
// ENCODER: Value = InstBitsByHw[opcode];
// ENCODER: switch (HwMode) {
// ENCODER: default: llvm_unreachable("Unhandled HwMode");
// ENCODER: case 2: {
// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
// ENCODER: op &= UINT64_C(240);
// ENCODER: Value |= op;
// ENCODER: break;
// ENCODER: }
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