3c7c8929d4
* Use streams to avoid dealing with std::string * Print operand masks in hex * Make the output more succinct
265 lines
9.5 KiB
TableGen
265 lines
9.5 KiB
TableGen
// RUN: llvm-tblgen -gen-emitter -I %p/../../include %s | \
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// RUN: FileCheck %s --check-prefix=ENCODER
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// RUN: llvm-tblgen -gen-disassembler -I %p/../../include %s | \
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// RUN: FileCheck %s --check-prefix=DECODER
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// RUN: llvm-tblgen -gen-disassembler --suppress-per-hwmode-duplicates=O1 -I \
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// RUN: %p/../../include %s | FileCheck %s --check-prefix=DECODER-SUPPRESS-O1
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// RUN: llvm-tblgen -gen-disassembler --suppress-per-hwmode-duplicates=O2 -I \
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// RUN: %p/../../include %s | FileCheck %s --check-prefix=DECODER-SUPPRESS-O2
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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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def Myi32 : Operand<i32> {
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let DecoderMethod = "DecodeMyi32";
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}
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def HasA : Predicate<"Subtarget->hasA()">;
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def HasB : Predicate<"Subtarget->hasB()">;
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def ModeA : HwMode<[HasA]>; // Mode 1
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def ModeB : HwMode<[HasB]>; // Mode 2
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def ModeC : HwMode<[]>; // Mode 3
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def fooTypeEncDefault : InstructionEncoding {
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let Size = 8;
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field bits<64> SoftFail = 0;
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bits<64> Inst;
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bits<8> factor;
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let Inst{7...0} = factor;
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let Inst{3...2} = 0b10;
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let Inst{1...0} = 0b00;
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}
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def fooTypeEncA : InstructionEncoding {
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let Size = 4;
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field bits<32> SoftFail = 0;
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bits<32> Inst;
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bits<8> factor;
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let Inst{7...0} = factor;
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let Inst{3...2} = 0b11;
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let Inst{1...0} = 0b00;
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}
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def fooTypeEncB : InstructionEncoding {
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let Size = 4;
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field bits<32> SoftFail = 0;
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bits<32> Inst;
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bits<8> factor;
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let Inst{15...8} = factor;
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let Inst{1...0} = 0b11;
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}
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def fooTypeEncC : InstructionEncoding {
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let Size = 4;
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field bits<32> SoftFail = 0;
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bits<32> Inst;
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bits<8> factor;
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let Inst{31...24} = factor;
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let Inst{23...21} = 0b110;
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let Inst{1...0} = 0b11;
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}
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// Test for DefaultMode as a selector.
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def foo : Instruction {
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let OutOperandList = (outs);
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let InOperandList = (ins i32imm:$factor);
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let EncodingInfos = EncodingByHwMode<
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[ModeC, ModeA, ModeB, DefaultMode],
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[fooTypeEncC, fooTypeEncA, fooTypeEncB, fooTypeEncDefault]>;
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let AsmString = "foo $factor";
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}
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def bar: Instruction {
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let OutOperandList = (outs);
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let InOperandList = (ins i32imm:$factor);
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let Size = 4;
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bits<32> Inst;
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bits<32> SoftFail;
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bits<8> factor;
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let Inst{31...24} = factor;
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let Inst{1...0} = 0b10;
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let AsmString = "bar $factor";
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}
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def baz : Instruction {
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let OutOperandList = (outs);
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let InOperandList = (ins i32imm:$factor);
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bits<32> Inst;
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let EncodingInfos = EncodingByHwMode<
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[ModeB], [fooTypeEncA]
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>;
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let AsmString = "foo $factor";
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}
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def unrelated: Instruction {
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let OutOperandList = (outs);
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let DecoderNamespace = "Alt";
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let InOperandList = (ins i32imm:$factor);
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let Size = 4;
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bits<32> Inst;
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bits<32> SoftFail;
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bits<8> factor;
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let Inst{31...24} = factor;
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let Inst{1...0} = 0b10;
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let AsmString = "unrelated $factor";
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}
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// Under default settings, using 'HwMode' to dictate instruction encodings results in
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// significant duplication of DecoderTables. The four tables ‘DecoderTableAlt32’,
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// ‘DecoderTableAlt_ModeA32’, ‘DecoderTableAlt_ModeB32’ and 'DecoderTable_ModeC32' are
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// exact duplicates and could effectively be merged into one.
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// DECODER-LABEL: DecoderTable32
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// DECODER-DAG: Opcode: bar
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// DECODER-LABEL: DecoderTable_ModeA32
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// DECODER-DAG: Opcode: fooTypeEncA:foo
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// DECODER-DAG: Opcode: bar
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// DECODER-LABEL: DecoderTable_ModeB32
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// DECODER-DAG: Opcode: fooTypeEncB:foo
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// DECODER-DAG: Opcode: fooTypeEncA:baz
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// DECODER-DAG: Opcode: bar
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// DECODER-LABEL: DecoderTable_ModeC32
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// DECODER-DAG: Opcode: fooTypeEncC:foo
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// DECODER-DAG: Opcode: bar
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// DECODER-LABEL: DecoderTableAlt32
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// DECODER-DAG: Opcode: unrelated
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// DECODER-LABEL: DecoderTableAlt_ModeA32
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// DECODER-DAG: Opcode: unrelated
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// DECODER-LABEL: DecoderTableAlt_ModeB32
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// DECODER-DAG: Opcode: unrelated
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// DECODER-LABEL: DecoderTableAlt_ModeC32
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// DECODER-DAG: Opcode: unrelated
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// DECODER-LABEL: DecoderTable64
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// DECODER-DAG: Opcode: fooTypeEncDefault:foo
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// Under the 'O1' optimization level, unnecessary duplicate tables will be eliminated,
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// reducing the four ‘Alt’ tables down to just one.
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// DECODER-SUPPRESS-O1-LABEL: DecoderTable32
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// DECODER-SUPPRESS-O1-DAG: Opcode: bar
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// DECODER-SUPPRESS-O1-LABEL: DecoderTable_ModeA32
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// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncA:foo
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// DECODER-SUPPRESS-O1-DAG: Opcode: bar
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// DECODER-SUPPRESS-O1-LABEL: DecoderTable_ModeB32
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// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncB:foo
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// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncA:baz
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// DECODER-SUPPRESS-O1-DAG: Opcode: bar
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// DECODER-SUPPRESS-O1-LABEL: DecoderTable_ModeC32
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// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncC:foo
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// DECODER-SUPPRESS-O1-DAG: Opcode: bar
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// DECODER-SUPPRESS-O1-LABEL: DecoderTableAlt32
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// DECODER-SUPPRESS-O1-DAG: Opcode: unrelated
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// DECODER-SUPPRESS-O1-LABEL: DecoderTable64
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// DECODER-SUPPRESS-O1-DAG: Opcode: fooTypeEncDefault:foo
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// Under the 'O2' optimization condition, instructions possessing the 'EncodingByHwMode'
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// attribute will be extracted from their original DecoderNamespace and placed into their
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// respective HwMode tables. Meanwhile, other instructions that do not have the 'EncodingByHwMode'
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// attribute but are within the same DecoderNamespace will be stored in the 'Default' table. This
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// approach will significantly reduce instruction redundancy, but it necessitates users to thoroughly
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// consider the interplay between HwMode and DecoderNamespace for their instructions.
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// DECODER-SUPPRESS-O2-LABEL: DecoderTable32
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// DECODER-SUPPRESS-O2-DAG: Opcode: bar
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// DECODER-SUPPRESS-O2-LABEL: DecoderTable_ModeA32
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// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncA:foo
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// DECODER-SUPPRESS-O2-NOT: Opcode: bar
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// DECODER-SUPPRESS-O2-LABEL: DecoderTable_ModeB32
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// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncB:foo
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// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncA:baz
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// DECODER-SUPPRESS-O2-NOT: Opcode: bar
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// DECODER-SUPPRESS-O2-LABEL: DecoderTable_ModeC32
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// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncC:foo
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// DECODER-SUPPRESS-O2-NOT: Opcode: bar
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// DECODER-SUPPRESS-O2-LABEL: DecoderTableAlt32
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// DECODER-SUPPRESS-O2-DAG: Opcode: unrelated
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// DECODER-SUPPRESS-O2-LABEL: DecoderTable64
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// DECODER-SUPPRESS-O2-NOT: Opcode: bar
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// DECODER-SUPPRESS-O2-DAG: Opcode: fooTypeEncDefault:foo
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// For 'bar' and 'unrelated', we didn't assign any HwModes for them,
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// they should keep the same in the following four tables.
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// For 'foo' we assigned four HwModes( includes 'DefaultMode' ),
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// it's encodings should be different in the following four tables.
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// For 'baz' we only assigned ModeB for it, so it will be presented
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// as '0' in the tables of ModeA, ModeC and Default Mode.
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// ENCODER-LABEL: static const uint64_t InstBits[] = {
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// ENCODER-NEXT: UINT64_C(2), // bar
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// ENCODER-NEXT: UINT64_C(0), // baz
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// ENCODER-NEXT: UINT64_C(8), // foo
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// ENCODER-NEXT: UINT64_C(2), // unrelated
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// ENCODER-NEXT: };
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// ENCODER-LABEL: static const uint64_t InstBits_ModeA[] = {
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// ENCODER-NEXT: UINT64_C(2), // bar
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// ENCODER-NEXT: UINT64_C(0), // baz
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// ENCODER-NEXT: UINT64_C(12), // foo
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// ENCODER-NEXT: UINT64_C(2), // unrelated
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// ENCODER-NEXT: };
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// ENCODER-LABEL: static const uint64_t InstBits_ModeB[] = {
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// ENCODER-NEXT: UINT64_C(2), // bar
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// ENCODER-NEXT: UINT64_C(12), // baz
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// ENCODER-NEXT: UINT64_C(3), // foo
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// ENCODER-NEXT: UINT64_C(2), // unrelated
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// ENCODER-NEXT: };
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// ENCODER-LABEL: static const uint64_t InstBits_ModeC[] = {
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// ENCODER-NEXT: UINT64_C(2), // bar
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// ENCODER-NEXT: UINT64_C(0), // baz
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// ENCODER-NEXT: UINT64_C(12582915), // foo
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// ENCODER-NEXT: UINT64_C(2), // unrelated
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// ENCODER-NEXT: };
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// ENCODER-LABEL: case ::bar:
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// ENCODER-LABEL: case ::unrelated:
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// ENCODER-NOT: getHwMode
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// ENCODER-LABEL: case ::foo: {
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// ENCODER: unsigned HwMode = STI.getHwMode(MCSubtargetInfo::HwMode_EncodingInfo);
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// ENCODER: switch (HwMode) {
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// ENCODER: default: llvm_unreachable("Unknown hardware mode!"); break;
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// ENCODER: case 0: InstBitsByHw = InstBits; break;
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// ENCODER: case 1: InstBitsByHw = InstBits_ModeA; break;
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// ENCODER: case 2: InstBitsByHw = InstBits_ModeB; break;
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// ENCODER: case 3: InstBitsByHw = InstBits_ModeC; break;
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// ENCODER: };
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// ENCODER: Value = InstBitsByHw[TableIndex];
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// ENCODER: switch (HwMode) {
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// ENCODER: default: llvm_unreachable("Unhandled HwMode");
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// ENCODER: case 0: {
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// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
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// ENCODER: Value |= (op & 0xf0);
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// ENCODER: break;
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// ENCODER: }
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// ENCODER: case 1: {
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// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
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// ENCODER: Value |= (op & 0xf0);
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// ENCODER: break;
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// ENCODER: }
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// ENCODER: case 2: {
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// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
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// ENCODER: Value |= (op & 0xff) << 8;
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// ENCODER: break;
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// ENCODER: }
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// ENCODER: case 3: {
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// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
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// ENCODER: Value |= (op & 0xff) << 24;
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// ENCODER: break;
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// ENCODER: }
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// ENCODER-LABEL: case ::baz: {
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// ENCODER: unsigned HwMode = STI.getHwMode(MCSubtargetInfo::HwMode_EncodingInfo);
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// ENCODER: switch (HwMode) {
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// ENCODER: default: llvm_unreachable("Unknown hardware mode!"); break;
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// ENCODER: case 2: InstBitsByHw = InstBits_ModeB; break;
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// ENCODER: };
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// ENCODER: Value = InstBitsByHw[TableIndex];
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// ENCODER: switch (HwMode) {
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// ENCODER: default: llvm_unreachable("Unhandled HwMode");
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// ENCODER: case 2: {
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// ENCODER: op = getMachineOpValue(MI, MI.getOperand(0), Fixups, STI);
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// ENCODER: Value |= (op & 0xf0);
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// ENCODER: break;
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// ENCODER: }
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