1 //===-- SPUISelLowering.cpp - Cell SPU DAG Lowering Implementation --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the SPUTargetLowering class.
12 //===----------------------------------------------------------------------===//
14 #include "SPURegisterNames.h"
15 #include "SPUISelLowering.h"
16 #include "SPUTargetMachine.h"
17 #include "llvm/ADT/VectorExtras.h"
18 #include "llvm/Analysis/ScalarEvolutionExpressions.h"
19 #include "llvm/CodeGen/CallingConvLower.h"
20 #include "llvm/CodeGen/MachineFrameInfo.h"
21 #include "llvm/CodeGen/MachineFunction.h"
22 #include "llvm/CodeGen/MachineInstrBuilder.h"
23 #include "llvm/CodeGen/MachineRegisterInfo.h"
24 #include "llvm/CodeGen/SelectionDAG.h"
25 #include "llvm/Constants.h"
26 #include "llvm/Function.h"
27 #include "llvm/Intrinsics.h"
28 #include "llvm/Support/Debug.h"
29 #include "llvm/Support/MathExtras.h"
30 #include "llvm/Target/TargetOptions.h"
36 // Used in getTargetNodeName() below
38 std::map<unsigned, const char *> node_names;
40 //! MVT::ValueType mapping to useful data for Cell SPU
41 struct valtype_map_s {
42 const MVT::ValueType valtype;
43 const int prefslot_byte;
46 const valtype_map_s valtype_map[] = {
57 const size_t n_valtype_map = sizeof(valtype_map) / sizeof(valtype_map[0]);
59 const valtype_map_s *getValueTypeMapEntry(MVT::ValueType VT) {
60 const valtype_map_s *retval = 0;
62 for (size_t i = 0; i < n_valtype_map; ++i) {
63 if (valtype_map[i].valtype == VT) {
64 retval = valtype_map + i;
71 cerr << "getValueTypeMapEntry returns NULL for "
72 << MVT::getValueTypeString(VT)
81 //! Predicate that returns true if operand is a memory target
83 \arg Op Operand to test
84 \return true if the operand is a memory target (i.e., global
85 address, external symbol, constant pool) or an A-form
88 bool isMemoryOperand(const SDOperand &Op)
90 const unsigned Opc = Op.getOpcode();
91 return (Opc == ISD::GlobalAddress
92 || Opc == ISD::GlobalTLSAddress
93 || Opc == ISD::JumpTable
94 || Opc == ISD::ConstantPool
95 || Opc == ISD::ExternalSymbol
96 || Opc == ISD::TargetGlobalAddress
97 || Opc == ISD::TargetGlobalTLSAddress
98 || Opc == ISD::TargetJumpTable
99 || Opc == ISD::TargetConstantPool
100 || Opc == ISD::TargetExternalSymbol
101 || Opc == SPUISD::AFormAddr);
104 //! Predicate that returns true if the operand is an indirect target
105 bool isIndirectOperand(const SDOperand &Op)
107 const unsigned Opc = Op.getOpcode();
108 return (Opc == ISD::Register
109 || Opc == SPUISD::LDRESULT);
113 SPUTargetLowering::SPUTargetLowering(SPUTargetMachine &TM)
114 : TargetLowering(TM),
117 // Fold away setcc operations if possible.
120 // Use _setjmp/_longjmp instead of setjmp/longjmp.
121 setUseUnderscoreSetJmp(true);
122 setUseUnderscoreLongJmp(true);
124 // Set up the SPU's register classes:
125 // NOTE: i8 register class is not registered because we cannot determine when
126 // we need to zero or sign extend for custom-lowered loads and stores.
127 // NOTE: Ignore the previous note. For now. :-)
128 addRegisterClass(MVT::i8, SPU::R8CRegisterClass);
129 addRegisterClass(MVT::i16, SPU::R16CRegisterClass);
130 addRegisterClass(MVT::i32, SPU::R32CRegisterClass);
131 addRegisterClass(MVT::i64, SPU::R64CRegisterClass);
132 addRegisterClass(MVT::f32, SPU::R32FPRegisterClass);
133 addRegisterClass(MVT::f64, SPU::R64FPRegisterClass);
134 addRegisterClass(MVT::i128, SPU::GPRCRegisterClass);
136 // SPU has no sign or zero extended loads for i1, i8, i16:
137 setLoadXAction(ISD::EXTLOAD, MVT::i1, Promote);
138 setLoadXAction(ISD::SEXTLOAD, MVT::i1, Promote);
139 setLoadXAction(ISD::ZEXTLOAD, MVT::i1, Promote);
140 setTruncStoreAction(MVT::i8, MVT::i1, Custom);
141 setTruncStoreAction(MVT::i16, MVT::i1, Custom);
142 setTruncStoreAction(MVT::i32, MVT::i1, Custom);
143 setTruncStoreAction(MVT::i64, MVT::i1, Custom);
144 setTruncStoreAction(MVT::i128, MVT::i1, Custom);
146 setLoadXAction(ISD::EXTLOAD, MVT::i8, Custom);
147 setLoadXAction(ISD::SEXTLOAD, MVT::i8, Custom);
148 setLoadXAction(ISD::ZEXTLOAD, MVT::i8, Custom);
149 setTruncStoreAction(MVT::i8 , MVT::i8, Custom);
150 setTruncStoreAction(MVT::i16 , MVT::i8, Custom);
151 setTruncStoreAction(MVT::i32 , MVT::i8, Custom);
152 setTruncStoreAction(MVT::i64 , MVT::i8, Custom);
153 setTruncStoreAction(MVT::i128, MVT::i8, Custom);
155 setLoadXAction(ISD::EXTLOAD, MVT::i16, Custom);
156 setLoadXAction(ISD::SEXTLOAD, MVT::i16, Custom);
157 setLoadXAction(ISD::ZEXTLOAD, MVT::i16, Custom);
159 // SPU constant load actions are custom lowered:
160 setOperationAction(ISD::Constant, MVT::i64, Custom);
161 setOperationAction(ISD::ConstantFP, MVT::f32, Custom);
162 setOperationAction(ISD::ConstantFP, MVT::f64, Custom);
164 // SPU's loads and stores have to be custom lowered:
165 for (unsigned sctype = (unsigned) MVT::i1; sctype < (unsigned) MVT::f128;
167 setOperationAction(ISD::LOAD, sctype, Custom);
168 setOperationAction(ISD::STORE, sctype, Custom);
171 // Custom lower BRCOND for i1, i8 to "promote" the result to
172 // i32 and i16, respectively.
173 setOperationAction(ISD::BRCOND, MVT::Other, Custom);
175 // Expand the jumptable branches
176 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
177 setOperationAction(ISD::BR_CC, MVT::Other, Expand);
178 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
180 // SPU has no intrinsics for these particular operations:
181 setOperationAction(ISD::MEMMOVE, MVT::Other, Expand);
182 setOperationAction(ISD::MEMSET, MVT::Other, Expand);
183 setOperationAction(ISD::MEMCPY, MVT::Other, Expand);
185 // PowerPC has no SREM/UREM instructions
186 setOperationAction(ISD::SREM, MVT::i32, Expand);
187 setOperationAction(ISD::UREM, MVT::i32, Expand);
188 setOperationAction(ISD::SREM, MVT::i64, Expand);
189 setOperationAction(ISD::UREM, MVT::i64, Expand);
191 // We don't support sin/cos/sqrt/fmod
192 setOperationAction(ISD::FSIN , MVT::f64, Expand);
193 setOperationAction(ISD::FCOS , MVT::f64, Expand);
194 setOperationAction(ISD::FREM , MVT::f64, Expand);
195 setOperationAction(ISD::FSIN , MVT::f32, Expand);
196 setOperationAction(ISD::FCOS , MVT::f32, Expand);
197 setOperationAction(ISD::FREM , MVT::f32, Expand);
199 // If we're enabling GP optimizations, use hardware square root
200 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
201 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
203 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
204 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
206 // SPU can do rotate right and left, so legalize it... but customize for i8
207 // because instructions don't exist.
208 setOperationAction(ISD::ROTR, MVT::i32, Legal);
209 setOperationAction(ISD::ROTR, MVT::i16, Legal);
210 setOperationAction(ISD::ROTR, MVT::i8, Custom);
211 setOperationAction(ISD::ROTL, MVT::i32, Legal);
212 setOperationAction(ISD::ROTL, MVT::i16, Legal);
213 setOperationAction(ISD::ROTL, MVT::i8, Custom);
214 // SPU has no native version of shift left/right for i8
215 setOperationAction(ISD::SHL, MVT::i8, Custom);
216 setOperationAction(ISD::SRL, MVT::i8, Custom);
217 setOperationAction(ISD::SRA, MVT::i8, Custom);
219 // Custom lower i32 multiplications
220 setOperationAction(ISD::MUL, MVT::i32, Custom);
222 // Need to custom handle (some) common i8 math ops
223 setOperationAction(ISD::SUB, MVT::i8, Custom);
224 setOperationAction(ISD::MUL, MVT::i8, Custom);
226 // SPU does not have BSWAP. It does have i32 support CTLZ.
227 // CTPOP has to be custom lowered.
228 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
229 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
231 setOperationAction(ISD::CTPOP, MVT::i8, Custom);
232 setOperationAction(ISD::CTPOP, MVT::i16, Custom);
233 setOperationAction(ISD::CTPOP, MVT::i32, Custom);
234 setOperationAction(ISD::CTPOP, MVT::i64, Custom);
236 setOperationAction(ISD::CTTZ , MVT::i32, Expand);
237 setOperationAction(ISD::CTTZ , MVT::i64, Expand);
239 setOperationAction(ISD::CTLZ , MVT::i32, Legal);
241 // SPU does not have select or setcc
242 setOperationAction(ISD::SELECT, MVT::i1, Expand);
243 setOperationAction(ISD::SELECT, MVT::i8, Expand);
244 setOperationAction(ISD::SELECT, MVT::i16, Expand);
245 setOperationAction(ISD::SELECT, MVT::i32, Expand);
246 setOperationAction(ISD::SELECT, MVT::i64, Expand);
247 setOperationAction(ISD::SELECT, MVT::f32, Expand);
248 setOperationAction(ISD::SELECT, MVT::f64, Expand);
250 setOperationAction(ISD::SETCC, MVT::i1, Expand);
251 setOperationAction(ISD::SETCC, MVT::i8, Expand);
252 setOperationAction(ISD::SETCC, MVT::i16, Expand);
253 setOperationAction(ISD::SETCC, MVT::i32, Expand);
254 setOperationAction(ISD::SETCC, MVT::i64, Expand);
255 setOperationAction(ISD::SETCC, MVT::f32, Expand);
256 setOperationAction(ISD::SETCC, MVT::f64, Expand);
258 // SPU has a legal FP -> signed INT instruction
259 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Legal);
260 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
261 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Legal);
262 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Custom);
264 // FDIV on SPU requires custom lowering
265 setOperationAction(ISD::FDIV, MVT::f32, Custom);
266 //setOperationAction(ISD::FDIV, MVT::f64, Custom);
268 // SPU has [U|S]INT_TO_FP
269 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Legal);
270 setOperationAction(ISD::SINT_TO_FP, MVT::i16, Promote);
271 setOperationAction(ISD::SINT_TO_FP, MVT::i8, Promote);
272 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Legal);
273 setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote);
274 setOperationAction(ISD::UINT_TO_FP, MVT::i8, Promote);
275 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
276 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
278 setOperationAction(ISD::BIT_CONVERT, MVT::i32, Legal);
279 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Legal);
280 setOperationAction(ISD::BIT_CONVERT, MVT::i64, Legal);
281 setOperationAction(ISD::BIT_CONVERT, MVT::f64, Legal);
283 // We cannot sextinreg(i1). Expand to shifts.
284 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
286 // Support label based line numbers.
287 setOperationAction(ISD::LOCATION, MVT::Other, Expand);
288 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
290 // We want to legalize GlobalAddress and ConstantPool nodes into the
291 // appropriate instructions to materialize the address.
292 for (unsigned sctype = (unsigned) MVT::i1; sctype < (unsigned) MVT::f128;
294 setOperationAction(ISD::GlobalAddress, sctype, Custom);
295 setOperationAction(ISD::ConstantPool, sctype, Custom);
296 setOperationAction(ISD::JumpTable, sctype, Custom);
299 // RET must be custom lowered, to meet ABI requirements
300 setOperationAction(ISD::RET, MVT::Other, Custom);
302 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
303 setOperationAction(ISD::VASTART , MVT::Other, Custom);
305 // Use the default implementation.
306 setOperationAction(ISD::VAARG , MVT::Other, Expand);
307 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
308 setOperationAction(ISD::VAEND , MVT::Other, Expand);
309 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
310 setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
311 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Expand);
312 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64 , Expand);
314 // Cell SPU has instructions for converting between i64 and fp.
315 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
316 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
318 // To take advantage of the above i64 FP_TO_SINT, promote i32 FP_TO_UINT
319 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Promote);
321 // BUILD_PAIR can't be handled natively, and should be expanded to shl/or
322 setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
324 // First set operation action for all vector types to expand. Then we
325 // will selectively turn on ones that can be effectively codegen'd.
326 addRegisterClass(MVT::v16i8, SPU::VECREGRegisterClass);
327 addRegisterClass(MVT::v8i16, SPU::VECREGRegisterClass);
328 addRegisterClass(MVT::v4i32, SPU::VECREGRegisterClass);
329 addRegisterClass(MVT::v2i64, SPU::VECREGRegisterClass);
330 addRegisterClass(MVT::v4f32, SPU::VECREGRegisterClass);
331 addRegisterClass(MVT::v2f64, SPU::VECREGRegisterClass);
333 for (unsigned VT = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
334 VT <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++VT) {
335 // add/sub are legal for all supported vector VT's.
336 setOperationAction(ISD::ADD , (MVT::ValueType)VT, Legal);
337 setOperationAction(ISD::SUB , (MVT::ValueType)VT, Legal);
338 // mul has to be custom lowered.
339 setOperationAction(ISD::MUL , (MVT::ValueType)VT, Custom);
341 setOperationAction(ISD::AND , (MVT::ValueType)VT, Legal);
342 setOperationAction(ISD::OR , (MVT::ValueType)VT, Legal);
343 setOperationAction(ISD::XOR , (MVT::ValueType)VT, Legal);
344 setOperationAction(ISD::LOAD , (MVT::ValueType)VT, Legal);
345 setOperationAction(ISD::SELECT, (MVT::ValueType)VT, Legal);
346 setOperationAction(ISD::STORE, (MVT::ValueType)VT, Legal);
348 // These operations need to be expanded:
349 setOperationAction(ISD::SDIV, (MVT::ValueType)VT, Expand);
350 setOperationAction(ISD::SREM, (MVT::ValueType)VT, Expand);
351 setOperationAction(ISD::UDIV, (MVT::ValueType)VT, Expand);
352 setOperationAction(ISD::UREM, (MVT::ValueType)VT, Expand);
353 setOperationAction(ISD::FDIV, (MVT::ValueType)VT, Custom);
355 // Custom lower build_vector, constant pool spills, insert and
356 // extract vector elements:
357 setOperationAction(ISD::BUILD_VECTOR, (MVT::ValueType)VT, Custom);
358 setOperationAction(ISD::ConstantPool, (MVT::ValueType)VT, Custom);
359 setOperationAction(ISD::SCALAR_TO_VECTOR, (MVT::ValueType)VT, Custom);
360 setOperationAction(ISD::EXTRACT_VECTOR_ELT, (MVT::ValueType)VT, Custom);
361 setOperationAction(ISD::INSERT_VECTOR_ELT, (MVT::ValueType)VT, Custom);
362 setOperationAction(ISD::VECTOR_SHUFFLE, (MVT::ValueType)VT, Custom);
365 setOperationAction(ISD::MUL, MVT::v16i8, Custom);
366 setOperationAction(ISD::AND, MVT::v16i8, Custom);
367 setOperationAction(ISD::OR, MVT::v16i8, Custom);
368 setOperationAction(ISD::XOR, MVT::v16i8, Custom);
369 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom);
371 setSetCCResultType(MVT::i32);
372 setShiftAmountType(MVT::i32);
373 setSetCCResultContents(ZeroOrOneSetCCResult);
375 setStackPointerRegisterToSaveRestore(SPU::R1);
377 // We have target-specific dag combine patterns for the following nodes:
378 setTargetDAGCombine(ISD::ADD);
380 computeRegisterProperties();
384 SPUTargetLowering::getTargetNodeName(unsigned Opcode) const
386 if (node_names.empty()) {
387 node_names[(unsigned) SPUISD::RET_FLAG] = "SPUISD::RET_FLAG";
388 node_names[(unsigned) SPUISD::Hi] = "SPUISD::Hi";
389 node_names[(unsigned) SPUISD::Lo] = "SPUISD::Lo";
390 node_names[(unsigned) SPUISD::PCRelAddr] = "SPUISD::PCRelAddr";
391 node_names[(unsigned) SPUISD::AFormAddr] = "SPUISD::AFormAddr";
392 node_names[(unsigned) SPUISD::IndirectAddr] = "SPUISD::IndirectAddr";
393 node_names[(unsigned) SPUISD::LDRESULT] = "SPUISD::LDRESULT";
394 node_names[(unsigned) SPUISD::CALL] = "SPUISD::CALL";
395 node_names[(unsigned) SPUISD::SHUFB] = "SPUISD::SHUFB";
396 node_names[(unsigned) SPUISD::INSERT_MASK] = "SPUISD::INSERT_MASK";
397 node_names[(unsigned) SPUISD::CNTB] = "SPUISD::CNTB";
398 node_names[(unsigned) SPUISD::PROMOTE_SCALAR] = "SPUISD::PROMOTE_SCALAR";
399 node_names[(unsigned) SPUISD::EXTRACT_ELT0] = "SPUISD::EXTRACT_ELT0";
400 node_names[(unsigned) SPUISD::EXTRACT_ELT0_CHAINED] = "SPUISD::EXTRACT_ELT0_CHAINED";
401 node_names[(unsigned) SPUISD::EXTRACT_I1_ZEXT] = "SPUISD::EXTRACT_I1_ZEXT";
402 node_names[(unsigned) SPUISD::EXTRACT_I1_SEXT] = "SPUISD::EXTRACT_I1_SEXT";
403 node_names[(unsigned) SPUISD::EXTRACT_I8_ZEXT] = "SPUISD::EXTRACT_I8_ZEXT";
404 node_names[(unsigned) SPUISD::EXTRACT_I8_SEXT] = "SPUISD::EXTRACT_I8_SEXT";
405 node_names[(unsigned) SPUISD::MPY] = "SPUISD::MPY";
406 node_names[(unsigned) SPUISD::MPYU] = "SPUISD::MPYU";
407 node_names[(unsigned) SPUISD::MPYH] = "SPUISD::MPYH";
408 node_names[(unsigned) SPUISD::MPYHH] = "SPUISD::MPYHH";
409 node_names[(unsigned) SPUISD::VEC_SHL] = "SPUISD::VEC_SHL";
410 node_names[(unsigned) SPUISD::VEC_SRL] = "SPUISD::VEC_SRL";
411 node_names[(unsigned) SPUISD::VEC_SRA] = "SPUISD::VEC_SRA";
412 node_names[(unsigned) SPUISD::VEC_ROTL] = "SPUISD::VEC_ROTL";
413 node_names[(unsigned) SPUISD::VEC_ROTR] = "SPUISD::VEC_ROTR";
414 node_names[(unsigned) SPUISD::ROTBYTES_RIGHT_Z] =
415 "SPUISD::ROTBYTES_RIGHT_Z";
416 node_names[(unsigned) SPUISD::ROTBYTES_RIGHT_S] =
417 "SPUISD::ROTBYTES_RIGHT_S";
418 node_names[(unsigned) SPUISD::ROTBYTES_LEFT] = "SPUISD::ROTBYTES_LEFT";
419 node_names[(unsigned) SPUISD::ROTBYTES_LEFT_CHAINED] =
420 "SPUISD::ROTBYTES_LEFT_CHAINED";
421 node_names[(unsigned) SPUISD::FSMBI] = "SPUISD::FSMBI";
422 node_names[(unsigned) SPUISD::SELB] = "SPUISD::SELB";
423 node_names[(unsigned) SPUISD::SFPConstant] = "SPUISD::SFPConstant";
424 node_names[(unsigned) SPUISD::FPInterp] = "SPUISD::FPInterp";
425 node_names[(unsigned) SPUISD::FPRecipEst] = "SPUISD::FPRecipEst";
426 node_names[(unsigned) SPUISD::SEXT32TO64] = "SPUISD::SEXT32TO64";
429 std::map<unsigned, const char *>::iterator i = node_names.find(Opcode);
431 return ((i != node_names.end()) ? i->second : 0);
434 //===----------------------------------------------------------------------===//
435 // Calling convention code:
436 //===----------------------------------------------------------------------===//
438 #include "SPUGenCallingConv.inc"
440 //===----------------------------------------------------------------------===//
441 // LowerOperation implementation
442 //===----------------------------------------------------------------------===//
444 /// Aligned load common code for CellSPU
446 \param[in] Op The SelectionDAG load or store operand
447 \param[in] DAG The selection DAG
448 \param[in] ST CellSPU subtarget information structure
449 \param[in,out] alignment Caller initializes this to the load or store node's
450 value from getAlignment(), may be updated while generating the aligned load
451 \param[in,out] alignOffs Aligned offset; set by AlignedLoad to the aligned
452 offset (divisible by 16, modulo 16 == 0)
453 \param[in,out] prefSlotOffs Preferred slot offset; set by AlignedLoad to the
454 offset of the preferred slot (modulo 16 != 0)
455 \param[in,out] VT Caller initializes this value type to the the load or store
456 node's loaded or stored value type; may be updated if an i1-extended load or
458 \param[out] was16aligned true if the base pointer had 16-byte alignment,
459 otherwise false. Can help to determine if the chunk needs to be rotated.
461 Both load and store lowering load a block of data aligned on a 16-byte
462 boundary. This is the common aligned load code shared between both.
465 AlignedLoad(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST,
467 unsigned &alignment, int &alignOffs, int &prefSlotOffs,
468 MVT::ValueType &VT, bool &was16aligned)
470 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
471 const valtype_map_s *vtm = getValueTypeMapEntry(VT);
472 SDOperand basePtr = LSN->getBasePtr();
473 SDOperand chain = LSN->getChain();
475 if (basePtr.getOpcode() == ISD::ADD) {
476 SDOperand Op1 = basePtr.Val->getOperand(1);
478 if (Op1.getOpcode() == ISD::Constant || Op1.getOpcode() == ISD::TargetConstant) {
479 const ConstantSDNode *CN = cast<ConstantSDNode>(basePtr.getOperand(1));
481 alignOffs = (int) CN->getValue();
482 prefSlotOffs = (int) (alignOffs & 0xf);
484 // Adjust the rotation amount to ensure that the final result ends up in
485 // the preferred slot:
486 prefSlotOffs -= vtm->prefslot_byte;
487 basePtr = basePtr.getOperand(0);
489 // Loading from memory, can we adjust alignment?
490 if (basePtr.getOpcode() == SPUISD::AFormAddr) {
491 SDOperand APtr = basePtr.getOperand(0);
492 if (APtr.getOpcode() == ISD::TargetGlobalAddress) {
493 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(APtr);
494 alignment = GSDN->getGlobal()->getAlignment();
499 prefSlotOffs = -vtm->prefslot_byte;
503 prefSlotOffs = -vtm->prefslot_byte;
506 if (alignment == 16) {
507 // Realign the base pointer as a D-Form address:
508 if (!isMemoryOperand(basePtr) || (alignOffs & ~0xf) != 0) {
509 basePtr = DAG.getNode(ISD::ADD, PtrVT,
511 DAG.getConstant((alignOffs & ~0xf), PtrVT));
514 // Emit the vector load:
516 return DAG.getLoad(MVT::v16i8, chain, basePtr,
517 LSN->getSrcValue(), LSN->getSrcValueOffset(),
518 LSN->isVolatile(), 16);
521 // Unaligned load or we're using the "large memory" model, which means that
522 // we have to be very pessimistic:
523 if (isMemoryOperand(basePtr) || isIndirectOperand(basePtr)) {
524 basePtr = DAG.getNode(SPUISD::IndirectAddr, PtrVT, basePtr, DAG.getConstant(0, PtrVT));
528 basePtr = DAG.getNode(ISD::ADD, PtrVT, basePtr,
529 DAG.getConstant((alignOffs & ~0xf), PtrVT));
530 was16aligned = false;
531 return DAG.getLoad(MVT::v16i8, chain, basePtr,
532 LSN->getSrcValue(), LSN->getSrcValueOffset(),
533 LSN->isVolatile(), 16);
536 /// Custom lower loads for CellSPU
538 All CellSPU loads and stores are aligned to 16-byte boundaries, so for elements
539 within a 16-byte block, we have to rotate to extract the requested element.
542 LowerLOAD(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
543 LoadSDNode *LN = cast<LoadSDNode>(Op);
544 SDOperand the_chain = LN->getChain();
545 MVT::ValueType VT = LN->getMemoryVT();
546 MVT::ValueType OpVT = Op.Val->getValueType(0);
547 ISD::LoadExtType ExtType = LN->getExtensionType();
548 unsigned alignment = LN->getAlignment();
551 switch (LN->getAddressingMode()) {
552 case ISD::UNINDEXED: {
556 AlignedLoad(Op, DAG, ST, LN,alignment, offset, rotamt, VT, was16aligned);
561 the_chain = result.getValue(1);
562 // Rotate the chunk if necessary
565 if (rotamt != 0 || !was16aligned) {
566 SDVTList vecvts = DAG.getVTList(MVT::v16i8, MVT::Other);
571 Ops[2] = DAG.getConstant(rotamt, MVT::i16);
573 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
574 LoadSDNode *LN1 = cast<LoadSDNode>(result);
575 Ops[2] = DAG.getNode(ISD::ADD, PtrVT, LN1->getBasePtr(),
576 DAG.getConstant(rotamt, PtrVT));
579 result = DAG.getNode(SPUISD::ROTBYTES_LEFT_CHAINED, vecvts, Ops, 3);
580 the_chain = result.getValue(1);
583 if (VT == OpVT || ExtType == ISD::EXTLOAD) {
585 MVT::ValueType vecVT = MVT::v16i8;
587 // Convert the loaded v16i8 vector to the appropriate vector type
588 // specified by the operand:
591 vecVT = MVT::getVectorType(VT, (128 / MVT::getSizeInBits(VT)));
593 vecVT = MVT::getVectorType(OpVT, (128 / MVT::getSizeInBits(OpVT)));
596 Ops[1] = DAG.getNode(ISD::BIT_CONVERT, vecVT, result);
597 scalarvts = DAG.getVTList((OpVT == VT ? VT : OpVT), MVT::Other);
598 result = DAG.getNode(SPUISD::EXTRACT_ELT0_CHAINED, scalarvts, Ops, 2);
599 the_chain = result.getValue(1);
601 // Handle the sign and zero-extending loads for i1 and i8:
604 if (ExtType == ISD::SEXTLOAD) {
605 NewOpC = (OpVT == MVT::i1
606 ? SPUISD::EXTRACT_I1_SEXT
607 : SPUISD::EXTRACT_I8_SEXT);
609 assert(ExtType == ISD::ZEXTLOAD);
610 NewOpC = (OpVT == MVT::i1
611 ? SPUISD::EXTRACT_I1_ZEXT
612 : SPUISD::EXTRACT_I8_ZEXT);
615 result = DAG.getNode(NewOpC, OpVT, result);
618 SDVTList retvts = DAG.getVTList(OpVT, MVT::Other);
619 SDOperand retops[2] = {
624 result = DAG.getNode(SPUISD::LDRESULT, retvts,
625 retops, sizeof(retops) / sizeof(retops[0]));
632 case ISD::LAST_INDEXED_MODE:
633 cerr << "LowerLOAD: Got a LoadSDNode with an addr mode other than "
635 cerr << (unsigned) LN->getAddressingMode() << "\n";
643 /// Custom lower stores for CellSPU
645 All CellSPU stores are aligned to 16-byte boundaries, so for elements
646 within a 16-byte block, we have to generate a shuffle to insert the
647 requested element into its place, then store the resulting block.
650 LowerSTORE(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
651 StoreSDNode *SN = cast<StoreSDNode>(Op);
652 SDOperand Value = SN->getValue();
653 MVT::ValueType VT = Value.getValueType();
654 MVT::ValueType StVT = (!SN->isTruncatingStore() ? VT : SN->getMemoryVT());
655 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
656 unsigned alignment = SN->getAlignment();
658 switch (SN->getAddressingMode()) {
659 case ISD::UNINDEXED: {
660 int chunk_offset, slot_offset;
663 // The vector type we really want to load from the 16-byte chunk, except
664 // in the case of MVT::i1, which has to be v16i8.
665 unsigned vecVT, stVecVT = MVT::v16i8;
668 stVecVT = MVT::getVectorType(StVT, (128 / MVT::getSizeInBits(StVT)));
669 vecVT = MVT::getVectorType(VT, (128 / MVT::getSizeInBits(VT)));
671 SDOperand alignLoadVec =
672 AlignedLoad(Op, DAG, ST, SN, alignment,
673 chunk_offset, slot_offset, VT, was16aligned);
675 if (alignLoadVec.Val == 0)
678 LoadSDNode *LN = cast<LoadSDNode>(alignLoadVec);
679 SDOperand basePtr = LN->getBasePtr();
680 SDOperand the_chain = alignLoadVec.getValue(1);
681 SDOperand theValue = SN->getValue();
685 && (theValue.getOpcode() == ISD::AssertZext
686 || theValue.getOpcode() == ISD::AssertSext)) {
687 // Drill down and get the value for zero- and sign-extended
689 theValue = theValue.getOperand(0);
694 SDOperand insertEltOffs = DAG.getConstant(chunk_offset, PtrVT);
695 SDOperand insertEltPtr;
696 SDOperand insertEltOp;
698 // If the base pointer is already a D-form address, then just create
699 // a new D-form address with a slot offset and the orignal base pointer.
700 // Otherwise generate a D-form address with the slot offset relative
701 // to the stack pointer, which is always aligned.
702 DEBUG(cerr << "CellSPU LowerSTORE: basePtr = ");
703 DEBUG(basePtr.Val->dump(&DAG));
706 if (basePtr.getOpcode() == SPUISD::IndirectAddr ||
707 (basePtr.getOpcode() == ISD::ADD
708 && basePtr.getOperand(0).getOpcode() == SPUISD::IndirectAddr)) {
709 insertEltPtr = basePtr;
712 // $sp is always aligned, so use it when necessary to avoid loading
715 basePtr.Val->hasOneUse() ? DAG.getRegister(SPU::R1, PtrVT) : basePtr;
716 insertEltPtr = DAG.getNode(ISD::ADD, PtrVT, ptrP, insertEltOffs);
718 insertEltPtr = DAG.getNode(ISD::ADD, PtrVT, basePtr, insertEltOffs);
722 insertEltOp = DAG.getNode(SPUISD::INSERT_MASK, stVecVT, insertEltPtr);
723 result = DAG.getNode(SPUISD::SHUFB, vecVT,
724 DAG.getNode(ISD::SCALAR_TO_VECTOR, vecVT, theValue),
726 DAG.getNode(ISD::BIT_CONVERT, vecVT, insertEltOp));
728 result = DAG.getStore(the_chain, result, basePtr,
729 LN->getSrcValue(), LN->getSrcValueOffset(),
730 LN->isVolatile(), LN->getAlignment());
739 case ISD::LAST_INDEXED_MODE:
740 cerr << "LowerLOAD: Got a LoadSDNode with an addr mode other than "
742 cerr << (unsigned) SN->getAddressingMode() << "\n";
750 /// Generate the address of a constant pool entry.
752 LowerConstantPool(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
753 MVT::ValueType PtrVT = Op.getValueType();
754 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
755 Constant *C = CP->getConstVal();
756 SDOperand CPI = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment());
757 SDOperand Zero = DAG.getConstant(0, PtrVT);
758 const TargetMachine &TM = DAG.getTarget();
760 if (TM.getRelocationModel() == Reloc::Static) {
761 if (!ST->usingLargeMem()) {
762 // Just return the SDOperand with the constant pool address in it.
763 return DAG.getNode(SPUISD::AFormAddr, PtrVT, CPI, Zero);
766 SDOperand Hi = DAG.getNode(SPUISD::Hi, PtrVT, CPI, Zero);
767 SDOperand Lo = DAG.getNode(SPUISD::Lo, PtrVT, CPI, Zero);
769 return DAG.getNode(ISD::ADD, PtrVT, Lo, Hi);
771 return DAG.getNode(SPUISD::IndirectAddr, PtrVT, CPI, Zero);
777 "LowerConstantPool: Relocation model other than static not supported.");
782 LowerJumpTable(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
783 MVT::ValueType PtrVT = Op.getValueType();
784 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
785 SDOperand JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
786 SDOperand Zero = DAG.getConstant(0, PtrVT);
787 const TargetMachine &TM = DAG.getTarget();
789 if (TM.getRelocationModel() == Reloc::Static) {
790 SDOperand JmpAForm = DAG.getNode(SPUISD::AFormAddr, PtrVT, JTI, Zero);
791 return (!ST->usingLargeMem()
793 : DAG.getNode(SPUISD::IndirectAddr, PtrVT, JmpAForm, Zero));
797 "LowerJumpTable: Relocation model other than static not supported.");
802 LowerGlobalAddress(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
803 MVT::ValueType PtrVT = Op.getValueType();
804 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
805 GlobalValue *GV = GSDN->getGlobal();
806 SDOperand GA = DAG.getTargetGlobalAddress(GV, PtrVT, GSDN->getOffset());
807 const TargetMachine &TM = DAG.getTarget();
808 SDOperand Zero = DAG.getConstant(0, PtrVT);
810 if (TM.getRelocationModel() == Reloc::Static) {
811 if (!ST->usingLargeMem()) {
812 return DAG.getNode(SPUISD::AFormAddr, PtrVT, GA, Zero);
814 SDOperand Hi = DAG.getNode(SPUISD::Hi, PtrVT, GA, Zero);
815 SDOperand Lo = DAG.getNode(SPUISD::Lo, PtrVT, GA, Zero);
816 return DAG.getNode(SPUISD::IndirectAddr, PtrVT, Hi, Lo);
819 cerr << "LowerGlobalAddress: Relocation model other than static not "
828 //! Custom lower i64 integer constants
830 This code inserts all of the necessary juggling that needs to occur to load
831 a 64-bit constant into a register.
834 LowerConstant(SDOperand Op, SelectionDAG &DAG) {
835 unsigned VT = Op.getValueType();
836 ConstantSDNode *CN = cast<ConstantSDNode>(Op.Val);
838 if (VT == MVT::i64) {
839 SDOperand T = DAG.getConstant(CN->getValue(), MVT::i64);
840 return DAG.getNode(SPUISD::EXTRACT_ELT0, VT,
841 DAG.getNode(ISD::BUILD_VECTOR, MVT::v2i64, T, T));
844 cerr << "LowerConstant: unhandled constant type "
845 << MVT::getValueTypeString(VT)
854 //! Custom lower single precision floating point constants
856 "float" immediates can be lowered as if they were unsigned 32-bit integers.
857 The SPUISD::SFPConstant pseudo-instruction handles this in the instruction
861 LowerConstantFP(SDOperand Op, SelectionDAG &DAG) {
862 unsigned VT = Op.getValueType();
863 ConstantFPSDNode *FP = cast<ConstantFPSDNode>(Op.Val);
866 "LowerConstantFP: Node is not ConstantFPSDNode");
868 if (VT == MVT::f32) {
869 float targetConst = FP->getValueAPF().convertToFloat();
870 return DAG.getNode(SPUISD::SFPConstant, VT,
871 DAG.getTargetConstantFP(targetConst, VT));
872 } else if (VT == MVT::f64) {
873 uint64_t dbits = DoubleToBits(FP->getValueAPF().convertToDouble());
874 return DAG.getNode(ISD::BIT_CONVERT, VT,
875 LowerConstant(DAG.getConstant(dbits, MVT::i64), DAG));
881 //! Lower MVT::i1, MVT::i8 brcond to a promoted type (MVT::i32, MVT::i16)
883 LowerBRCOND(SDOperand Op, SelectionDAG &DAG)
885 SDOperand Cond = Op.getOperand(1);
886 MVT::ValueType CondVT = Cond.getValueType();
887 MVT::ValueType CondNVT;
889 if (CondVT == MVT::i1 || CondVT == MVT::i8) {
890 CondNVT = (CondVT == MVT::i1 ? MVT::i32 : MVT::i16);
891 return DAG.getNode(ISD::BRCOND, Op.getValueType(),
893 DAG.getNode(ISD::ZERO_EXTEND, CondNVT, Op.getOperand(1)),
896 return SDOperand(); // Unchanged
900 LowerFORMAL_ARGUMENTS(SDOperand Op, SelectionDAG &DAG, int &VarArgsFrameIndex)
902 MachineFunction &MF = DAG.getMachineFunction();
903 MachineFrameInfo *MFI = MF.getFrameInfo();
904 MachineRegisterInfo &RegInfo = MF.getRegInfo();
905 SmallVector<SDOperand, 8> ArgValues;
906 SDOperand Root = Op.getOperand(0);
907 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
909 const unsigned *ArgRegs = SPURegisterInfo::getArgRegs();
910 const unsigned NumArgRegs = SPURegisterInfo::getNumArgRegs();
912 unsigned ArgOffset = SPUFrameInfo::minStackSize();
913 unsigned ArgRegIdx = 0;
914 unsigned StackSlotSize = SPUFrameInfo::stackSlotSize();
916 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
918 // Add DAG nodes to load the arguments or copy them out of registers.
919 for (unsigned ArgNo = 0, e = Op.Val->getNumValues()-1; ArgNo != e; ++ArgNo) {
921 bool needsLoad = false;
922 MVT::ValueType ObjectVT = Op.getValue(ArgNo).getValueType();
923 unsigned ObjSize = MVT::getSizeInBits(ObjectVT)/8;
927 cerr << "LowerFORMAL_ARGUMENTS Unhandled argument type: "
928 << MVT::getValueTypeString(ObjectVT)
933 if (!isVarArg && ArgRegIdx < NumArgRegs) {
934 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R8CRegClass);
935 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
936 ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i8);
943 if (!isVarArg && ArgRegIdx < NumArgRegs) {
944 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R16CRegClass);
945 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
946 ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i16);
953 if (!isVarArg && ArgRegIdx < NumArgRegs) {
954 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
955 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
956 ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i32);
963 if (!isVarArg && ArgRegIdx < NumArgRegs) {
964 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R64CRegClass);
965 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
966 ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::i64);
973 if (!isVarArg && ArgRegIdx < NumArgRegs) {
974 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R32FPRegClass);
975 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
976 ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::f32);
983 if (!isVarArg && ArgRegIdx < NumArgRegs) {
984 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R64FPRegClass);
985 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
986 ArgVal = DAG.getCopyFromReg(Root, VReg, MVT::f64);
997 if (!isVarArg && ArgRegIdx < NumArgRegs) {
998 unsigned VReg = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
999 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
1000 ArgVal = DAG.getCopyFromReg(Root, VReg, ObjectVT);
1008 // We need to load the argument to a virtual register if we determined above
1009 // that we ran out of physical registers of the appropriate type
1011 // If the argument is actually used, emit a load from the right stack
1013 if (!Op.Val->hasNUsesOfValue(0, ArgNo)) {
1014 int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
1015 SDOperand FIN = DAG.getFrameIndex(FI, PtrVT);
1016 ArgVal = DAG.getLoad(ObjectVT, Root, FIN, NULL, 0);
1018 // Don't emit a dead load.
1019 ArgVal = DAG.getNode(ISD::UNDEF, ObjectVT);
1022 ArgOffset += StackSlotSize;
1025 ArgValues.push_back(ArgVal);
1028 // If the function takes variable number of arguments, make a frame index for
1029 // the start of the first vararg value... for expansion of llvm.va_start.
1031 VarArgsFrameIndex = MFI->CreateFixedObject(MVT::getSizeInBits(PtrVT)/8,
1033 SDOperand FIN = DAG.getFrameIndex(VarArgsFrameIndex, PtrVT);
1034 // If this function is vararg, store any remaining integer argument regs to
1035 // their spots on the stack so that they may be loaded by deferencing the
1036 // result of va_next.
1037 SmallVector<SDOperand, 8> MemOps;
1038 for (; ArgRegIdx != NumArgRegs; ++ArgRegIdx) {
1039 unsigned VReg = RegInfo.createVirtualRegister(&SPU::GPRCRegClass);
1040 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
1041 SDOperand Val = DAG.getCopyFromReg(Root, VReg, PtrVT);
1042 SDOperand Store = DAG.getStore(Val.getValue(1), Val, FIN, NULL, 0);
1043 MemOps.push_back(Store);
1044 // Increment the address by four for the next argument to store
1045 SDOperand PtrOff = DAG.getConstant(MVT::getSizeInBits(PtrVT)/8, PtrVT);
1046 FIN = DAG.getNode(ISD::ADD, PtrOff.getValueType(), FIN, PtrOff);
1048 if (!MemOps.empty())
1049 Root = DAG.getNode(ISD::TokenFactor, MVT::Other,&MemOps[0],MemOps.size());
1052 ArgValues.push_back(Root);
1054 // Return the new list of results.
1055 std::vector<MVT::ValueType> RetVT(Op.Val->value_begin(),
1056 Op.Val->value_end());
1057 return DAG.getNode(ISD::MERGE_VALUES, RetVT, &ArgValues[0], ArgValues.size());
1060 /// isLSAAddress - Return the immediate to use if the specified
1061 /// value is representable as a LSA address.
1062 static SDNode *isLSAAddress(SDOperand Op, SelectionDAG &DAG) {
1063 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
1066 int Addr = C->getValue();
1067 if ((Addr & 3) != 0 || // Low 2 bits are implicitly zero.
1068 (Addr << 14 >> 14) != Addr)
1069 return 0; // Top 14 bits have to be sext of immediate.
1071 return DAG.getConstant((int)C->getValue() >> 2, MVT::i32).Val;
1076 LowerCALL(SDOperand Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
1077 SDOperand Chain = Op.getOperand(0);
1079 bool isVarArg = cast<ConstantSDNode>(Op.getOperand(2))->getValue() != 0;
1080 bool isTailCall = cast<ConstantSDNode>(Op.getOperand(3))->getValue() != 0;
1082 SDOperand Callee = Op.getOperand(4);
1083 unsigned NumOps = (Op.getNumOperands() - 5) / 2;
1084 unsigned StackSlotSize = SPUFrameInfo::stackSlotSize();
1085 const unsigned *ArgRegs = SPURegisterInfo::getArgRegs();
1086 const unsigned NumArgRegs = SPURegisterInfo::getNumArgRegs();
1088 // Handy pointer type
1089 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1091 // Accumulate how many bytes are to be pushed on the stack, including the
1092 // linkage area, and parameter passing area. According to the SPU ABI,
1093 // we minimally need space for [LR] and [SP]
1094 unsigned NumStackBytes = SPUFrameInfo::minStackSize();
1096 // Set up a copy of the stack pointer for use loading and storing any
1097 // arguments that may not fit in the registers available for argument
1099 SDOperand StackPtr = DAG.getRegister(SPU::R1, MVT::i32);
1101 // Figure out which arguments are going to go in registers, and which in
1103 unsigned ArgOffset = SPUFrameInfo::minStackSize(); // Just below [LR]
1104 unsigned ArgRegIdx = 0;
1106 // Keep track of registers passing arguments
1107 std::vector<std::pair<unsigned, SDOperand> > RegsToPass;
1108 // And the arguments passed on the stack
1109 SmallVector<SDOperand, 8> MemOpChains;
1111 for (unsigned i = 0; i != NumOps; ++i) {
1112 SDOperand Arg = Op.getOperand(5+2*i);
1114 // PtrOff will be used to store the current argument to the stack if a
1115 // register cannot be found for it.
1116 SDOperand PtrOff = DAG.getConstant(ArgOffset, StackPtr.getValueType());
1117 PtrOff = DAG.getNode(ISD::ADD, PtrVT, StackPtr, PtrOff);
1119 switch (Arg.getValueType()) {
1120 default: assert(0 && "Unexpected ValueType for argument!");
1124 if (ArgRegIdx != NumArgRegs) {
1125 RegsToPass.push_back(std::make_pair(ArgRegs[ArgRegIdx++], Arg));
1127 MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
1128 ArgOffset += StackSlotSize;
1133 if (ArgRegIdx != NumArgRegs) {
1134 RegsToPass.push_back(std::make_pair(ArgRegs[ArgRegIdx++], Arg));
1136 MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
1137 ArgOffset += StackSlotSize;
1144 if (ArgRegIdx != NumArgRegs) {
1145 RegsToPass.push_back(std::make_pair(ArgRegs[ArgRegIdx++], Arg));
1147 MemOpChains.push_back(DAG.getStore(Chain, Arg, PtrOff, NULL, 0));
1148 ArgOffset += StackSlotSize;
1154 // Update number of stack bytes actually used, insert a call sequence start
1155 NumStackBytes = (ArgOffset - SPUFrameInfo::minStackSize());
1156 Chain = DAG.getCALLSEQ_START(Chain, DAG.getConstant(NumStackBytes, PtrVT));
1158 if (!MemOpChains.empty()) {
1159 // Adjust the stack pointer for the stack arguments.
1160 Chain = DAG.getNode(ISD::TokenFactor, MVT::Other,
1161 &MemOpChains[0], MemOpChains.size());
1164 // Build a sequence of copy-to-reg nodes chained together with token chain
1165 // and flag operands which copy the outgoing args into the appropriate regs.
1167 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1168 Chain = DAG.getCopyToReg(Chain, RegsToPass[i].first, RegsToPass[i].second,
1170 InFlag = Chain.getValue(1);
1173 std::vector<MVT::ValueType> NodeTys;
1174 NodeTys.push_back(MVT::Other); // Returns a chain
1175 NodeTys.push_back(MVT::Flag); // Returns a flag for retval copy to use.
1177 SmallVector<SDOperand, 8> Ops;
1178 unsigned CallOpc = SPUISD::CALL;
1180 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1181 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1182 // node so that legalize doesn't hack it.
1183 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1184 GlobalValue *GV = G->getGlobal();
1185 unsigned CalleeVT = Callee.getValueType();
1186 SDOperand Zero = DAG.getConstant(0, PtrVT);
1187 SDOperand GA = DAG.getTargetGlobalAddress(GV, CalleeVT);
1189 if (!ST->usingLargeMem()) {
1190 // Turn calls to targets that are defined (i.e., have bodies) into BRSL
1191 // style calls, otherwise, external symbols are BRASL calls. This assumes
1192 // that declared/defined symbols are in the same compilation unit and can
1193 // be reached through PC-relative jumps.
1196 // This may be an unsafe assumption for JIT and really large compilation
1198 if (GV->isDeclaration()) {
1199 Callee = DAG.getNode(SPUISD::AFormAddr, CalleeVT, GA, Zero);
1201 Callee = DAG.getNode(SPUISD::PCRelAddr, CalleeVT, GA, Zero);
1204 // "Large memory" mode: Turn all calls into indirect calls with a X-form
1206 Callee = DAG.getNode(SPUISD::IndirectAddr, PtrVT, GA, Zero);
1208 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee))
1209 Callee = DAG.getExternalSymbol(S->getSymbol(), Callee.getValueType());
1210 else if (SDNode *Dest = isLSAAddress(Callee, DAG)) {
1211 // If this is an absolute destination address that appears to be a legal
1212 // local store address, use the munged value.
1213 Callee = SDOperand(Dest, 0);
1216 Ops.push_back(Chain);
1217 Ops.push_back(Callee);
1219 // Add argument registers to the end of the list so that they are known live
1221 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1222 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1223 RegsToPass[i].second.getValueType()));
1226 Ops.push_back(InFlag);
1227 Chain = DAG.getNode(CallOpc, NodeTys, &Ops[0], Ops.size());
1228 InFlag = Chain.getValue(1);
1230 Chain = DAG.getCALLSEQ_END(Chain,
1231 DAG.getConstant(NumStackBytes, PtrVT),
1232 DAG.getConstant(0, PtrVT),
1234 if (Op.Val->getValueType(0) != MVT::Other)
1235 InFlag = Chain.getValue(1);
1237 SDOperand ResultVals[3];
1238 unsigned NumResults = 0;
1241 // If the call has results, copy the values out of the ret val registers.
1242 switch (Op.Val->getValueType(0)) {
1243 default: assert(0 && "Unexpected ret value!");
1244 case MVT::Other: break;
1246 if (Op.Val->getValueType(1) == MVT::i32) {
1247 Chain = DAG.getCopyFromReg(Chain, SPU::R4, MVT::i32, InFlag).getValue(1);
1248 ResultVals[0] = Chain.getValue(0);
1249 Chain = DAG.getCopyFromReg(Chain, SPU::R3, MVT::i32,
1250 Chain.getValue(2)).getValue(1);
1251 ResultVals[1] = Chain.getValue(0);
1253 NodeTys.push_back(MVT::i32);
1255 Chain = DAG.getCopyFromReg(Chain, SPU::R3, MVT::i32, InFlag).getValue(1);
1256 ResultVals[0] = Chain.getValue(0);
1259 NodeTys.push_back(MVT::i32);
1262 Chain = DAG.getCopyFromReg(Chain, SPU::R3, MVT::i64, InFlag).getValue(1);
1263 ResultVals[0] = Chain.getValue(0);
1265 NodeTys.push_back(MVT::i64);
1269 Chain = DAG.getCopyFromReg(Chain, SPU::R3, Op.Val->getValueType(0),
1270 InFlag).getValue(1);
1271 ResultVals[0] = Chain.getValue(0);
1273 NodeTys.push_back(Op.Val->getValueType(0));
1280 Chain = DAG.getCopyFromReg(Chain, SPU::R3, Op.Val->getValueType(0),
1281 InFlag).getValue(1);
1282 ResultVals[0] = Chain.getValue(0);
1284 NodeTys.push_back(Op.Val->getValueType(0));
1288 NodeTys.push_back(MVT::Other);
1290 // If the function returns void, just return the chain.
1291 if (NumResults == 0)
1294 // Otherwise, merge everything together with a MERGE_VALUES node.
1295 ResultVals[NumResults++] = Chain;
1296 SDOperand Res = DAG.getNode(ISD::MERGE_VALUES, NodeTys,
1297 ResultVals, NumResults);
1298 return Res.getValue(Op.ResNo);
1302 LowerRET(SDOperand Op, SelectionDAG &DAG, TargetMachine &TM) {
1303 SmallVector<CCValAssign, 16> RVLocs;
1304 unsigned CC = DAG.getMachineFunction().getFunction()->getCallingConv();
1305 bool isVarArg = DAG.getMachineFunction().getFunction()->isVarArg();
1306 CCState CCInfo(CC, isVarArg, TM, RVLocs);
1307 CCInfo.AnalyzeReturn(Op.Val, RetCC_SPU);
1309 // If this is the first return lowered for this function, add the regs to the
1310 // liveout set for the function.
1311 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1312 for (unsigned i = 0; i != RVLocs.size(); ++i)
1313 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1316 SDOperand Chain = Op.getOperand(0);
1319 // Copy the result values into the output registers.
1320 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1321 CCValAssign &VA = RVLocs[i];
1322 assert(VA.isRegLoc() && "Can only return in registers!");
1323 Chain = DAG.getCopyToReg(Chain, VA.getLocReg(), Op.getOperand(i*2+1), Flag);
1324 Flag = Chain.getValue(1);
1328 return DAG.getNode(SPUISD::RET_FLAG, MVT::Other, Chain, Flag);
1330 return DAG.getNode(SPUISD::RET_FLAG, MVT::Other, Chain);
1334 //===----------------------------------------------------------------------===//
1335 // Vector related lowering:
1336 //===----------------------------------------------------------------------===//
1338 static ConstantSDNode *
1339 getVecImm(SDNode *N) {
1340 SDOperand OpVal(0, 0);
1342 // Check to see if this buildvec has a single non-undef value in its elements.
1343 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1344 if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
1346 OpVal = N->getOperand(i);
1347 else if (OpVal != N->getOperand(i))
1351 if (OpVal.Val != 0) {
1352 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
1357 return 0; // All UNDEF: use implicit def.; not Constant node
1360 /// get_vec_i18imm - Test if this vector is a vector filled with the same value
1361 /// and the value fits into an unsigned 18-bit constant, and if so, return the
1363 SDOperand SPU::get_vec_u18imm(SDNode *N, SelectionDAG &DAG,
1364 MVT::ValueType ValueType) {
1365 if (ConstantSDNode *CN = getVecImm(N)) {
1366 uint64_t Value = CN->getValue();
1367 if (Value <= 0x3ffff)
1368 return DAG.getConstant(Value, ValueType);
1374 /// get_vec_i16imm - Test if this vector is a vector filled with the same value
1375 /// and the value fits into a signed 16-bit constant, and if so, return the
1377 SDOperand SPU::get_vec_i16imm(SDNode *N, SelectionDAG &DAG,
1378 MVT::ValueType ValueType) {
1379 if (ConstantSDNode *CN = getVecImm(N)) {
1380 if (ValueType == MVT::i32) {
1381 int Value = (int) CN->getValue();
1382 int SExtValue = ((Value & 0xffff) << 16) >> 16;
1384 if (Value == SExtValue)
1385 return DAG.getConstant(Value, ValueType);
1386 } else if (ValueType == MVT::i16) {
1387 short Value = (short) CN->getValue();
1388 int SExtValue = ((int) Value << 16) >> 16;
1390 if (Value == (short) SExtValue)
1391 return DAG.getConstant(Value, ValueType);
1392 } else if (ValueType == MVT::i64) {
1393 int64_t Value = CN->getValue();
1394 int64_t SExtValue = ((Value & 0xffff) << (64 - 16)) >> (64 - 16);
1396 if (Value == SExtValue)
1397 return DAG.getConstant(Value, ValueType);
1404 /// get_vec_i10imm - Test if this vector is a vector filled with the same value
1405 /// and the value fits into a signed 10-bit constant, and if so, return the
1407 SDOperand SPU::get_vec_i10imm(SDNode *N, SelectionDAG &DAG,
1408 MVT::ValueType ValueType) {
1409 if (ConstantSDNode *CN = getVecImm(N)) {
1410 int Value = (int) CN->getValue();
1411 if ((ValueType == MVT::i32 && isS10Constant(Value))
1412 || (ValueType == MVT::i16 && isS10Constant((short) Value)))
1413 return DAG.getConstant(Value, ValueType);
1419 /// get_vec_i8imm - Test if this vector is a vector filled with the same value
1420 /// and the value fits into a signed 8-bit constant, and if so, return the
1423 /// @note: The incoming vector is v16i8 because that's the only way we can load
1424 /// constant vectors. Thus, we test to see if the upper and lower bytes are the
1426 SDOperand SPU::get_vec_i8imm(SDNode *N, SelectionDAG &DAG,
1427 MVT::ValueType ValueType) {
1428 if (ConstantSDNode *CN = getVecImm(N)) {
1429 int Value = (int) CN->getValue();
1430 if (ValueType == MVT::i16
1431 && Value <= 0xffff /* truncated from uint64_t */
1432 && ((short) Value >> 8) == ((short) Value & 0xff))
1433 return DAG.getConstant(Value & 0xff, ValueType);
1434 else if (ValueType == MVT::i8
1435 && (Value & 0xff) == Value)
1436 return DAG.getConstant(Value, ValueType);
1442 /// get_ILHUvec_imm - Test if this vector is a vector filled with the same value
1443 /// and the value fits into a signed 16-bit constant, and if so, return the
1445 SDOperand SPU::get_ILHUvec_imm(SDNode *N, SelectionDAG &DAG,
1446 MVT::ValueType ValueType) {
1447 if (ConstantSDNode *CN = getVecImm(N)) {
1448 uint64_t Value = CN->getValue();
1449 if ((ValueType == MVT::i32
1450 && ((unsigned) Value & 0xffff0000) == (unsigned) Value)
1451 || (ValueType == MVT::i64 && (Value & 0xffff0000) == Value))
1452 return DAG.getConstant(Value >> 16, ValueType);
1458 /// get_v4i32_imm - Catch-all for general 32-bit constant vectors
1459 SDOperand SPU::get_v4i32_imm(SDNode *N, SelectionDAG &DAG) {
1460 if (ConstantSDNode *CN = getVecImm(N)) {
1461 return DAG.getConstant((unsigned) CN->getValue(), MVT::i32);
1467 /// get_v4i32_imm - Catch-all for general 64-bit constant vectors
1468 SDOperand SPU::get_v2i64_imm(SDNode *N, SelectionDAG &DAG) {
1469 if (ConstantSDNode *CN = getVecImm(N)) {
1470 return DAG.getConstant((unsigned) CN->getValue(), MVT::i64);
1476 // If this is a vector of constants or undefs, get the bits. A bit in
1477 // UndefBits is set if the corresponding element of the vector is an
1478 // ISD::UNDEF value. For undefs, the corresponding VectorBits values are
1479 // zero. Return true if this is not an array of constants, false if it is.
1481 static bool GetConstantBuildVectorBits(SDNode *BV, uint64_t VectorBits[2],
1482 uint64_t UndefBits[2]) {
1483 // Start with zero'd results.
1484 VectorBits[0] = VectorBits[1] = UndefBits[0] = UndefBits[1] = 0;
1486 unsigned EltBitSize = MVT::getSizeInBits(BV->getOperand(0).getValueType());
1487 for (unsigned i = 0, e = BV->getNumOperands(); i != e; ++i) {
1488 SDOperand OpVal = BV->getOperand(i);
1490 unsigned PartNo = i >= e/2; // In the upper 128 bits?
1491 unsigned SlotNo = e/2 - (i & (e/2-1))-1; // Which subpiece of the uint64_t.
1493 uint64_t EltBits = 0;
1494 if (OpVal.getOpcode() == ISD::UNDEF) {
1495 uint64_t EltUndefBits = ~0ULL >> (64-EltBitSize);
1496 UndefBits[PartNo] |= EltUndefBits << (SlotNo*EltBitSize);
1498 } else if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
1499 EltBits = CN->getValue() & (~0ULL >> (64-EltBitSize));
1500 } else if (ConstantFPSDNode *CN = dyn_cast<ConstantFPSDNode>(OpVal)) {
1501 const APFloat &apf = CN->getValueAPF();
1502 EltBits = (CN->getValueType(0) == MVT::f32
1503 ? FloatToBits(apf.convertToFloat())
1504 : DoubleToBits(apf.convertToDouble()));
1506 // Nonconstant element.
1510 VectorBits[PartNo] |= EltBits << (SlotNo*EltBitSize);
1513 //printf("%llx %llx %llx %llx\n",
1514 // VectorBits[0], VectorBits[1], UndefBits[0], UndefBits[1]);
1518 /// If this is a splat (repetition) of a value across the whole vector, return
1519 /// the smallest size that splats it. For example, "0x01010101010101..." is a
1520 /// splat of 0x01, 0x0101, and 0x01010101. We return SplatBits = 0x01 and
1521 /// SplatSize = 1 byte.
1522 static bool isConstantSplat(const uint64_t Bits128[2],
1523 const uint64_t Undef128[2],
1525 uint64_t &SplatBits, uint64_t &SplatUndef,
1527 // Don't let undefs prevent splats from matching. See if the top 64-bits are
1528 // the same as the lower 64-bits, ignoring undefs.
1529 uint64_t Bits64 = Bits128[0] | Bits128[1];
1530 uint64_t Undef64 = Undef128[0] & Undef128[1];
1531 uint32_t Bits32 = uint32_t(Bits64) | uint32_t(Bits64 >> 32);
1532 uint32_t Undef32 = uint32_t(Undef64) & uint32_t(Undef64 >> 32);
1533 uint16_t Bits16 = uint16_t(Bits32) | uint16_t(Bits32 >> 16);
1534 uint16_t Undef16 = uint16_t(Undef32) & uint16_t(Undef32 >> 16);
1536 if ((Bits128[0] & ~Undef128[1]) == (Bits128[1] & ~Undef128[0])) {
1537 if (MinSplatBits < 64) {
1539 // Check that the top 32-bits are the same as the lower 32-bits, ignoring
1541 if ((Bits64 & (~Undef64 >> 32)) == ((Bits64 >> 32) & ~Undef64)) {
1542 if (MinSplatBits < 32) {
1544 // If the top 16-bits are different than the lower 16-bits, ignoring
1545 // undefs, we have an i32 splat.
1546 if ((Bits32 & (~Undef32 >> 16)) == ((Bits32 >> 16) & ~Undef32)) {
1547 if (MinSplatBits < 16) {
1548 // If the top 8-bits are different than the lower 8-bits, ignoring
1549 // undefs, we have an i16 splat.
1550 if ((Bits16 & (uint16_t(~Undef16) >> 8)) == ((Bits16 >> 8) & ~Undef16)) {
1551 // Otherwise, we have an 8-bit splat.
1552 SplatBits = uint8_t(Bits16) | uint8_t(Bits16 >> 8);
1553 SplatUndef = uint8_t(Undef16) & uint8_t(Undef16 >> 8);
1559 SplatUndef = Undef16;
1566 SplatUndef = Undef32;
1572 SplatBits = Bits128[0];
1573 SplatUndef = Undef128[0];
1579 return false; // Can't be a splat if two pieces don't match.
1582 // If this is a case we can't handle, return null and let the default
1583 // expansion code take care of it. If we CAN select this case, and if it
1584 // selects to a single instruction, return Op. Otherwise, if we can codegen
1585 // this case more efficiently than a constant pool load, lower it to the
1586 // sequence of ops that should be used.
1587 static SDOperand LowerBUILD_VECTOR(SDOperand Op, SelectionDAG &DAG) {
1588 MVT::ValueType VT = Op.getValueType();
1589 // If this is a vector of constants or undefs, get the bits. A bit in
1590 // UndefBits is set if the corresponding element of the vector is an
1591 // ISD::UNDEF value. For undefs, the corresponding VectorBits values are
1593 uint64_t VectorBits[2];
1594 uint64_t UndefBits[2];
1595 uint64_t SplatBits, SplatUndef;
1597 if (GetConstantBuildVectorBits(Op.Val, VectorBits, UndefBits)
1598 || !isConstantSplat(VectorBits, UndefBits,
1599 MVT::getSizeInBits(MVT::getVectorElementType(VT)),
1600 SplatBits, SplatUndef, SplatSize))
1601 return SDOperand(); // Not a constant vector, not a splat.
1606 uint32_t Value32 = SplatBits;
1607 assert(SplatSize == 4
1608 && "LowerBUILD_VECTOR: Unexpected floating point vector element.");
1609 // NOTE: pretend the constant is an integer. LLVM won't load FP constants
1610 SDOperand T = DAG.getConstant(Value32, MVT::i32);
1611 return DAG.getNode(ISD::BIT_CONVERT, MVT::v4f32,
1612 DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32, T, T, T, T));
1616 uint64_t f64val = SplatBits;
1617 assert(SplatSize == 8
1618 && "LowerBUILD_VECTOR: 64-bit float vector element: unexpected size.");
1619 // NOTE: pretend the constant is an integer. LLVM won't load FP constants
1620 SDOperand T = DAG.getConstant(f64val, MVT::i64);
1621 return DAG.getNode(ISD::BIT_CONVERT, MVT::v2f64,
1622 DAG.getNode(ISD::BUILD_VECTOR, MVT::v2i64, T, T));
1626 // 8-bit constants have to be expanded to 16-bits
1627 unsigned short Value16 = SplatBits | (SplatBits << 8);
1629 for (int i = 0; i < 8; ++i)
1630 Ops[i] = DAG.getConstant(Value16, MVT::i16);
1631 return DAG.getNode(ISD::BIT_CONVERT, VT,
1632 DAG.getNode(ISD::BUILD_VECTOR, MVT::v8i16, Ops, 8));
1635 unsigned short Value16;
1637 Value16 = (unsigned short) (SplatBits & 0xffff);
1639 Value16 = (unsigned short) (SplatBits | (SplatBits << 8));
1640 SDOperand T = DAG.getConstant(Value16, MVT::getVectorElementType(VT));
1642 for (int i = 0; i < 8; ++i) Ops[i] = T;
1643 return DAG.getNode(ISD::BUILD_VECTOR, VT, Ops, 8);
1646 unsigned int Value = SplatBits;
1647 SDOperand T = DAG.getConstant(Value, MVT::getVectorElementType(VT));
1648 return DAG.getNode(ISD::BUILD_VECTOR, VT, T, T, T, T);
1651 uint64_t val = SplatBits;
1652 uint32_t upper = uint32_t(val >> 32);
1653 uint32_t lower = uint32_t(val);
1658 SmallVector<SDOperand, 16> ShufBytes;
1660 bool upper_special, lower_special;
1662 // NOTE: This code creates common-case shuffle masks that can be easily
1663 // detected as common expressions. It is not attempting to create highly
1664 // specialized masks to replace any and all 0's, 0xff's and 0x80's.
1666 // Detect if the upper or lower half is a special shuffle mask pattern:
1667 upper_special = (upper == 0 || upper == 0xffffffff || upper == 0x80000000);
1668 lower_special = (lower == 0 || lower == 0xffffffff || lower == 0x80000000);
1670 // Create lower vector if not a special pattern
1671 if (!lower_special) {
1672 SDOperand LO32C = DAG.getConstant(lower, MVT::i32);
1673 LO32 = DAG.getNode(ISD::BIT_CONVERT, VT,
1674 DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32,
1675 LO32C, LO32C, LO32C, LO32C));
1678 // Create upper vector if not a special pattern
1679 if (!upper_special) {
1680 SDOperand HI32C = DAG.getConstant(upper, MVT::i32);
1681 HI32 = DAG.getNode(ISD::BIT_CONVERT, VT,
1682 DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32,
1683 HI32C, HI32C, HI32C, HI32C));
1686 // If either upper or lower are special, then the two input operands are
1687 // the same (basically, one of them is a "don't care")
1692 if (lower_special && upper_special) {
1693 // Unhappy situation... both upper and lower are special, so punt with
1694 // a target constant:
1695 SDOperand Zero = DAG.getConstant(0, MVT::i32);
1696 HI32 = LO32 = DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32, Zero, Zero,
1700 for (int i = 0; i < 4; ++i) {
1701 for (int j = 0; j < 4; ++j) {
1703 bool process_upper, process_lower;
1706 process_upper = (upper_special && (i & 1) == 0);
1707 process_lower = (lower_special && (i & 1) == 1);
1709 if (process_upper || process_lower) {
1710 if ((process_upper && upper == 0)
1711 || (process_lower && lower == 0))
1713 else if ((process_upper && upper == 0xffffffff)
1714 || (process_lower && lower == 0xffffffff))
1716 else if ((process_upper && upper == 0x80000000)
1717 || (process_lower && lower == 0x80000000))
1718 val = (j == 0 ? 0xe0 : 0x80);
1720 val = i * 4 + j + ((i & 1) * 16);
1722 ShufBytes.push_back(DAG.getConstant(val, MVT::i8));
1726 return DAG.getNode(SPUISD::SHUFB, VT, HI32, LO32,
1727 DAG.getNode(ISD::BUILD_VECTOR, MVT::v16i8,
1728 &ShufBytes[0], ShufBytes.size()));
1730 // For zero, this can be lowered efficiently via v4i32 BUILD_VECTOR
1731 SDOperand Zero = DAG.getConstant(0, MVT::i32);
1732 return DAG.getNode(ISD::BIT_CONVERT, VT,
1733 DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32,
1734 Zero, Zero, Zero, Zero));
1742 /// LowerVECTOR_SHUFFLE - Lower a vector shuffle (V1, V2, V3) to something on
1743 /// which the Cell can operate. The code inspects V3 to ascertain whether the
1744 /// permutation vector, V3, is monotonically increasing with one "exception"
1745 /// element, e.g., (0, 1, _, 3). If this is the case, then generate a
1746 /// INSERT_MASK synthetic instruction. Otherwise, spill V3 to the constant pool.
1747 /// In either case, the net result is going to eventually invoke SHUFB to
1748 /// permute/shuffle the bytes from V1 and V2.
1750 /// INSERT_MASK is eventually selected as one of the C*D instructions, generate
1751 /// control word for byte/halfword/word insertion. This takes care of a single
1752 /// element move from V2 into V1.
1754 /// SPUISD::SHUFB is eventually selected as Cell's <i>shufb</i> instructions.
1755 static SDOperand LowerVECTOR_SHUFFLE(SDOperand Op, SelectionDAG &DAG) {
1756 SDOperand V1 = Op.getOperand(0);
1757 SDOperand V2 = Op.getOperand(1);
1758 SDOperand PermMask = Op.getOperand(2);
1760 if (V2.getOpcode() == ISD::UNDEF) V2 = V1;
1762 // If we have a single element being moved from V1 to V2, this can be handled
1763 // using the C*[DX] compute mask instructions, but the vector elements have
1764 // to be monotonically increasing with one exception element.
1765 MVT::ValueType EltVT = MVT::getVectorElementType(V1.getValueType());
1766 unsigned EltsFromV2 = 0;
1768 unsigned V2EltIdx0 = 0;
1769 unsigned CurrElt = 0;
1770 bool monotonic = true;
1771 if (EltVT == MVT::i8)
1773 else if (EltVT == MVT::i16)
1775 else if (EltVT == MVT::i32)
1778 assert(0 && "Unhandled vector type in LowerVECTOR_SHUFFLE");
1780 for (unsigned i = 0, e = PermMask.getNumOperands();
1781 EltsFromV2 <= 1 && monotonic && i != e;
1784 if (PermMask.getOperand(i).getOpcode() == ISD::UNDEF)
1787 SrcElt = cast<ConstantSDNode>(PermMask.getOperand(i))->getValue();
1789 if (SrcElt >= V2EltIdx0) {
1791 V2Elt = (V2EltIdx0 - SrcElt) << 2;
1792 } else if (CurrElt != SrcElt) {
1799 if (EltsFromV2 == 1 && monotonic) {
1800 // Compute mask and shuffle
1801 MachineFunction &MF = DAG.getMachineFunction();
1802 MachineRegisterInfo &RegInfo = MF.getRegInfo();
1803 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
1804 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1805 // Initialize temporary register to 0
1806 SDOperand InitTempReg =
1807 DAG.getCopyToReg(DAG.getEntryNode(), VReg, DAG.getConstant(0, PtrVT));
1808 // Copy register's contents as index in INSERT_MASK:
1809 SDOperand ShufMaskOp =
1810 DAG.getNode(SPUISD::INSERT_MASK, V1.getValueType(),
1811 DAG.getTargetConstant(V2Elt, MVT::i32),
1812 DAG.getCopyFromReg(InitTempReg, VReg, PtrVT));
1813 // Use shuffle mask in SHUFB synthetic instruction:
1814 return DAG.getNode(SPUISD::SHUFB, V1.getValueType(), V2, V1, ShufMaskOp);
1816 // Convert the SHUFFLE_VECTOR mask's input element units to the actual bytes.
1817 unsigned BytesPerElement = MVT::getSizeInBits(EltVT)/8;
1819 SmallVector<SDOperand, 16> ResultMask;
1820 for (unsigned i = 0, e = PermMask.getNumOperands(); i != e; ++i) {
1822 if (PermMask.getOperand(i).getOpcode() == ISD::UNDEF)
1825 SrcElt = cast<ConstantSDNode>(PermMask.getOperand(i))->getValue();
1827 for (unsigned j = 0; j != BytesPerElement; ++j) {
1828 ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,
1833 SDOperand VPermMask = DAG.getNode(ISD::BUILD_VECTOR, MVT::v16i8,
1834 &ResultMask[0], ResultMask.size());
1835 return DAG.getNode(SPUISD::SHUFB, V1.getValueType(), V1, V2, VPermMask);
1839 static SDOperand LowerSCALAR_TO_VECTOR(SDOperand Op, SelectionDAG &DAG) {
1840 SDOperand Op0 = Op.getOperand(0); // Op0 = the scalar
1842 if (Op0.Val->getOpcode() == ISD::Constant) {
1843 // For a constant, build the appropriate constant vector, which will
1844 // eventually simplify to a vector register load.
1846 ConstantSDNode *CN = cast<ConstantSDNode>(Op0.Val);
1847 SmallVector<SDOperand, 16> ConstVecValues;
1851 // Create a constant vector:
1852 switch (Op.getValueType()) {
1853 default: assert(0 && "Unexpected constant value type in "
1854 "LowerSCALAR_TO_VECTOR");
1855 case MVT::v16i8: n_copies = 16; VT = MVT::i8; break;
1856 case MVT::v8i16: n_copies = 8; VT = MVT::i16; break;
1857 case MVT::v4i32: n_copies = 4; VT = MVT::i32; break;
1858 case MVT::v4f32: n_copies = 4; VT = MVT::f32; break;
1859 case MVT::v2i64: n_copies = 2; VT = MVT::i64; break;
1860 case MVT::v2f64: n_copies = 2; VT = MVT::f64; break;
1863 SDOperand CValue = DAG.getConstant(CN->getValue(), VT);
1864 for (size_t j = 0; j < n_copies; ++j)
1865 ConstVecValues.push_back(CValue);
1867 return DAG.getNode(ISD::BUILD_VECTOR, Op.getValueType(),
1868 &ConstVecValues[0], ConstVecValues.size());
1870 // Otherwise, copy the value from one register to another:
1871 switch (Op0.getValueType()) {
1872 default: assert(0 && "Unexpected value type in LowerSCALAR_TO_VECTOR");
1879 return DAG.getNode(SPUISD::PROMOTE_SCALAR, Op.getValueType(), Op0, Op0);
1886 static SDOperand LowerVectorMUL(SDOperand Op, SelectionDAG &DAG) {
1887 switch (Op.getValueType()) {
1889 SDOperand rA = Op.getOperand(0);
1890 SDOperand rB = Op.getOperand(1);
1891 SDOperand HiProd1 = DAG.getNode(SPUISD::MPYH, MVT::v4i32, rA, rB);
1892 SDOperand HiProd2 = DAG.getNode(SPUISD::MPYH, MVT::v4i32, rB, rA);
1893 SDOperand LoProd = DAG.getNode(SPUISD::MPYU, MVT::v4i32, rA, rB);
1894 SDOperand Residual1 = DAG.getNode(ISD::ADD, MVT::v4i32, LoProd, HiProd1);
1896 return DAG.getNode(ISD::ADD, MVT::v4i32, Residual1, HiProd2);
1900 // Multiply two v8i16 vectors (pipeline friendly version):
1901 // a) multiply lower halves, mask off upper 16-bit of 32-bit product
1902 // b) multiply upper halves, rotate left by 16 bits (inserts 16 lower zeroes)
1903 // c) Use SELB to select upper and lower halves from the intermediate results
1905 // NOTE: We really want to move the FSMBI to earlier to actually get the
1906 // dual-issue. This code does manage to do this, even if it's a little on
1909 MachineFunction &MF = DAG.getMachineFunction();
1910 MachineRegisterInfo &RegInfo = MF.getRegInfo();
1911 SDOperand Chain = Op.getOperand(0);
1912 SDOperand rA = Op.getOperand(0);
1913 SDOperand rB = Op.getOperand(1);
1914 unsigned FSMBIreg = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
1915 unsigned HiProdReg = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
1918 DAG.getCopyToReg(Chain, FSMBIreg,
1919 DAG.getNode(SPUISD::FSMBI, MVT::v8i16,
1920 DAG.getConstant(0xcccc, MVT::i32)));
1923 DAG.getCopyToReg(FSMBOp, HiProdReg,
1924 DAG.getNode(SPUISD::MPYHH, MVT::v8i16, rA, rB));
1926 SDOperand HHProd_v4i32 =
1927 DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32,
1928 DAG.getCopyFromReg(HHProd, HiProdReg, MVT::v4i32));
1930 return DAG.getNode(SPUISD::SELB, MVT::v8i16,
1931 DAG.getNode(SPUISD::MPY, MVT::v8i16, rA, rB),
1932 DAG.getNode(ISD::BIT_CONVERT, Op.getValueType(),
1933 DAG.getNode(SPUISD::VEC_SHL, MVT::v4i32,
1935 DAG.getConstant(16, MVT::i16))),
1936 DAG.getCopyFromReg(FSMBOp, FSMBIreg, MVT::v4i32));
1939 // This M00sE is N@stI! (apologies to Monty Python)
1941 // SPU doesn't know how to do any 8-bit multiplication, so the solution
1942 // is to break it all apart, sign extend, and reassemble the various
1943 // intermediate products.
1945 MachineFunction &MF = DAG.getMachineFunction();
1946 MachineRegisterInfo &RegInfo = MF.getRegInfo();
1947 SDOperand Chain = Op.getOperand(0);
1948 SDOperand rA = Op.getOperand(0);
1949 SDOperand rB = Op.getOperand(1);
1950 SDOperand c8 = DAG.getConstant(8, MVT::i8);
1951 SDOperand c16 = DAG.getConstant(16, MVT::i8);
1953 unsigned FSMBreg_2222 = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
1954 unsigned LoProd_reg = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
1955 unsigned HiProd_reg = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
1958 DAG.getNode(SPUISD::MPY, MVT::v8i16,
1959 DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, rA),
1960 DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, rB));
1962 SDOperand rALH = DAG.getNode(SPUISD::VEC_SRA, MVT::v8i16, rA, c8);
1964 SDOperand rBLH = DAG.getNode(SPUISD::VEC_SRA, MVT::v8i16, rB, c8);
1967 DAG.getNode(SPUISD::VEC_SHL, MVT::v8i16,
1968 DAG.getNode(SPUISD::MPY, MVT::v8i16, rALH, rBLH), c8);
1970 SDOperand FSMBdef_2222 =
1971 DAG.getCopyToReg(Chain, FSMBreg_2222,
1972 DAG.getNode(SPUISD::FSMBI, MVT::v8i16,
1973 DAG.getConstant(0x2222, MVT::i32)));
1975 SDOperand FSMBuse_2222 =
1976 DAG.getCopyFromReg(FSMBdef_2222, FSMBreg_2222, MVT::v4i32);
1978 SDOperand LoProd_1 =
1979 DAG.getCopyToReg(Chain, LoProd_reg,
1980 DAG.getNode(SPUISD::SELB, MVT::v8i16, LLProd, LHProd,
1983 SDOperand LoProdMask = DAG.getConstant(0xffff, MVT::i32);
1986 DAG.getNode(ISD::AND, MVT::v4i32,
1987 DAG.getCopyFromReg(LoProd_1, LoProd_reg, MVT::v4i32),
1988 DAG.getNode(ISD::BUILD_VECTOR, MVT::v4i32,
1989 LoProdMask, LoProdMask,
1990 LoProdMask, LoProdMask));
1993 DAG.getNode(SPUISD::VEC_SRA, MVT::v4i32,
1994 DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, rA), c16);
1997 DAG.getNode(SPUISD::VEC_SRA, MVT::v4i32,
1998 DAG.getNode(ISD::BIT_CONVERT, MVT::v4i32, rB), c16);
2001 DAG.getNode(SPUISD::MPY, MVT::v8i16,
2002 DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, rAH),
2003 DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16, rBH));
2005 SDOperand HHProd_1 =
2006 DAG.getNode(SPUISD::MPY, MVT::v8i16,
2007 DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16,
2008 DAG.getNode(SPUISD::VEC_SRA, MVT::v4i32, rAH, c8)),
2009 DAG.getNode(ISD::BIT_CONVERT, MVT::v8i16,
2010 DAG.getNode(SPUISD::VEC_SRA, MVT::v4i32, rBH, c8)));
2013 DAG.getCopyToReg(Chain, HiProd_reg,
2014 DAG.getNode(SPUISD::SELB, MVT::v8i16,
2016 DAG.getNode(SPUISD::VEC_SHL, MVT::v8i16, HHProd_1, c8),
2020 DAG.getNode(SPUISD::VEC_SHL, MVT::v4i32,
2021 DAG.getCopyFromReg(HHProd, HiProd_reg, MVT::v4i32), c16);
2023 return DAG.getNode(ISD::BIT_CONVERT, MVT::v16i8,
2024 DAG.getNode(ISD::OR, MVT::v4i32,
2029 cerr << "CellSPU: Unknown vector multiplication, got "
2030 << MVT::getValueTypeString(Op.getValueType())
2039 static SDOperand LowerFDIVf32(SDOperand Op, SelectionDAG &DAG) {
2040 MachineFunction &MF = DAG.getMachineFunction();
2041 MachineRegisterInfo &RegInfo = MF.getRegInfo();
2043 SDOperand A = Op.getOperand(0);
2044 SDOperand B = Op.getOperand(1);
2045 unsigned VT = Op.getValueType();
2047 unsigned VRegBR, VRegC;
2049 if (VT == MVT::f32) {
2050 VRegBR = RegInfo.createVirtualRegister(&SPU::R32FPRegClass);
2051 VRegC = RegInfo.createVirtualRegister(&SPU::R32FPRegClass);
2053 VRegBR = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
2054 VRegC = RegInfo.createVirtualRegister(&SPU::VECREGRegClass);
2056 // TODO: make sure we're feeding FPInterp the right arguments
2057 // Right now: fi B, frest(B)
2060 // (Floating Interpolate (FP Reciprocal Estimate B))
2062 DAG.getCopyToReg(DAG.getEntryNode(), VRegBR,
2063 DAG.getNode(SPUISD::FPInterp, VT, B,
2064 DAG.getNode(SPUISD::FPRecipEst, VT, B)));
2066 // Computes A * BRcpl and stores in a temporary register
2068 DAG.getCopyToReg(BRcpl, VRegC,
2069 DAG.getNode(ISD::FMUL, VT, A,
2070 DAG.getCopyFromReg(BRcpl, VRegBR, VT)));
2071 // What's the Chain variable do? It's magic!
2072 // TODO: set Chain = Op(0).getEntryNode()
2074 return DAG.getNode(ISD::FADD, VT,
2075 DAG.getCopyFromReg(AxBRcpl, VRegC, VT),
2076 DAG.getNode(ISD::FMUL, VT,
2077 DAG.getCopyFromReg(AxBRcpl, VRegBR, VT),
2078 DAG.getNode(ISD::FSUB, VT, A,
2079 DAG.getNode(ISD::FMUL, VT, B,
2080 DAG.getCopyFromReg(AxBRcpl, VRegC, VT)))));
2083 static SDOperand LowerEXTRACT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
2084 unsigned VT = Op.getValueType();
2085 SDOperand N = Op.getOperand(0);
2086 SDOperand Elt = Op.getOperand(1);
2087 SDOperand ShufMask[16];
2088 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt);
2090 assert(C != 0 && "LowerEXTRACT_VECTOR_ELT expecting constant SDNode");
2092 int EltNo = (int) C->getValue();
2095 if (VT == MVT::i8 && EltNo >= 16)
2096 assert(0 && "SPU LowerEXTRACT_VECTOR_ELT: i8 extraction slot > 15");
2097 else if (VT == MVT::i16 && EltNo >= 8)
2098 assert(0 && "SPU LowerEXTRACT_VECTOR_ELT: i16 extraction slot > 7");
2099 else if (VT == MVT::i32 && EltNo >= 4)
2100 assert(0 && "SPU LowerEXTRACT_VECTOR_ELT: i32 extraction slot > 4");
2101 else if (VT == MVT::i64 && EltNo >= 2)
2102 assert(0 && "SPU LowerEXTRACT_VECTOR_ELT: i64 extraction slot > 2");
2104 if (EltNo == 0 && (VT == MVT::i32 || VT == MVT::i64)) {
2105 // i32 and i64: Element 0 is the preferred slot
2106 return DAG.getNode(SPUISD::EXTRACT_ELT0, VT, N);
2109 // Need to generate shuffle mask and extract:
2110 int prefslot_begin = -1, prefslot_end = -1;
2111 int elt_byte = EltNo * MVT::getSizeInBits(VT) / 8;
2115 prefslot_begin = prefslot_end = 3;
2119 prefslot_begin = 2; prefslot_end = 3;
2123 prefslot_begin = 0; prefslot_end = 3;
2127 prefslot_begin = 0; prefslot_end = 7;
2132 assert(prefslot_begin != -1 && prefslot_end != -1 &&
2133 "LowerEXTRACT_VECTOR_ELT: preferred slots uninitialized");
2135 for (int i = 0; i < 16; ++i) {
2136 // zero fill uppper part of preferred slot, don't care about the
2138 unsigned int mask_val;
2140 if (i <= prefslot_end) {
2142 ((i < prefslot_begin)
2144 : elt_byte + (i - prefslot_begin));
2146 ShufMask[i] = DAG.getConstant(mask_val, MVT::i8);
2148 ShufMask[i] = ShufMask[i % (prefslot_end + 1)];
2151 SDOperand ShufMaskVec =
2152 DAG.getNode(ISD::BUILD_VECTOR, MVT::v16i8,
2154 sizeof(ShufMask) / sizeof(ShufMask[0]));
2156 return DAG.getNode(SPUISD::EXTRACT_ELT0, VT,
2157 DAG.getNode(SPUISD::SHUFB, N.getValueType(),
2158 N, N, ShufMaskVec));
2162 static SDOperand LowerINSERT_VECTOR_ELT(SDOperand Op, SelectionDAG &DAG) {
2163 SDOperand VecOp = Op.getOperand(0);
2164 SDOperand ValOp = Op.getOperand(1);
2165 SDOperand IdxOp = Op.getOperand(2);
2166 MVT::ValueType VT = Op.getValueType();
2168 ConstantSDNode *CN = cast<ConstantSDNode>(IdxOp);
2169 assert(CN != 0 && "LowerINSERT_VECTOR_ELT: Index is not constant!");
2171 MVT::ValueType PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2172 // Use $2 because it's always 16-byte aligned and it's available:
2173 SDOperand PtrBase = DAG.getRegister(SPU::R2, PtrVT);
2176 DAG.getNode(SPUISD::SHUFB, VT,
2177 DAG.getNode(ISD::SCALAR_TO_VECTOR, VT, ValOp),
2179 DAG.getNode(SPUISD::INSERT_MASK, VT,
2180 DAG.getNode(ISD::ADD, PtrVT,
2182 DAG.getConstant(CN->getValue(),
2188 static SDOperand LowerI8Math(SDOperand Op, SelectionDAG &DAG, unsigned Opc) {
2189 SDOperand N0 = Op.getOperand(0); // Everything has at least one operand
2191 assert(Op.getValueType() == MVT::i8);
2194 assert(0 && "Unhandled i8 math operator");
2198 // 8-bit subtraction: Promote the arguments up to 16-bits and truncate
2200 SDOperand N1 = Op.getOperand(1);
2201 N0 = (N0.getOpcode() != ISD::Constant
2202 ? DAG.getNode(ISD::SIGN_EXTEND, MVT::i16, N0)
2203 : DAG.getConstant(cast<ConstantSDNode>(N0)->getValue(), MVT::i16));
2204 N1 = (N1.getOpcode() != ISD::Constant
2205 ? DAG.getNode(ISD::SIGN_EXTEND, MVT::i16, N1)
2206 : DAG.getConstant(cast<ConstantSDNode>(N1)->getValue(), MVT::i16));
2207 return DAG.getNode(ISD::TRUNCATE, MVT::i8,
2208 DAG.getNode(Opc, MVT::i16, N0, N1));
2212 SDOperand N1 = Op.getOperand(1);
2214 N0 = (N0.getOpcode() != ISD::Constant
2215 ? DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, N0)
2216 : DAG.getConstant(cast<ConstantSDNode>(N0)->getValue(), MVT::i16));
2217 N1Opc = (N1.getValueType() < MVT::i16 ? ISD::ZERO_EXTEND : ISD::TRUNCATE);
2218 N1 = (N1.getOpcode() != ISD::Constant
2219 ? DAG.getNode(N1Opc, MVT::i16, N1)
2220 : DAG.getConstant(cast<ConstantSDNode>(N1)->getValue(), MVT::i16));
2221 SDOperand ExpandArg =
2222 DAG.getNode(ISD::OR, MVT::i16, N0,
2223 DAG.getNode(ISD::SHL, MVT::i16,
2224 N0, DAG.getConstant(8, MVT::i16)));
2225 return DAG.getNode(ISD::TRUNCATE, MVT::i8,
2226 DAG.getNode(Opc, MVT::i16, ExpandArg, N1));
2230 SDOperand N1 = Op.getOperand(1);
2232 N0 = (N0.getOpcode() != ISD::Constant
2233 ? DAG.getNode(ISD::ZERO_EXTEND, MVT::i16, N0)
2234 : DAG.getConstant(cast<ConstantSDNode>(N0)->getValue(), MVT::i16));
2235 N1Opc = (N1.getValueType() < MVT::i16 ? ISD::ZERO_EXTEND : ISD::TRUNCATE);
2236 N1 = (N1.getOpcode() != ISD::Constant
2237 ? DAG.getNode(N1Opc, MVT::i16, N1)
2238 : DAG.getConstant(cast<ConstantSDNode>(N1)->getValue(), MVT::i16));
2239 return DAG.getNode(ISD::TRUNCATE, MVT::i8,
2240 DAG.getNode(Opc, MVT::i16, N0, N1));
2243 SDOperand N1 = Op.getOperand(1);
2245 N0 = (N0.getOpcode() != ISD::Constant
2246 ? DAG.getNode(ISD::SIGN_EXTEND, MVT::i16, N0)
2247 : DAG.getConstant(cast<ConstantSDNode>(N0)->getValue(), MVT::i16));
2248 N1Opc = (N1.getValueType() < MVT::i16 ? ISD::SIGN_EXTEND : ISD::TRUNCATE);
2249 N1 = (N1.getOpcode() != ISD::Constant
2250 ? DAG.getNode(N1Opc, MVT::i16, N1)
2251 : DAG.getConstant(cast<ConstantSDNode>(N1)->getValue(), MVT::i16));
2252 return DAG.getNode(ISD::TRUNCATE, MVT::i8,
2253 DAG.getNode(Opc, MVT::i16, N0, N1));
2256 SDOperand N1 = Op.getOperand(1);
2258 N0 = (N0.getOpcode() != ISD::Constant
2259 ? DAG.getNode(ISD::SIGN_EXTEND, MVT::i16, N0)
2260 : DAG.getConstant(cast<ConstantSDNode>(N0)->getValue(), MVT::i16));
2261 N1Opc = (N1.getValueType() < MVT::i16 ? ISD::SIGN_EXTEND : ISD::TRUNCATE);
2262 N1 = (N1.getOpcode() != ISD::Constant
2263 ? DAG.getNode(N1Opc, MVT::i16, N1)
2264 : DAG.getConstant(cast<ConstantSDNode>(N1)->getValue(), MVT::i16));
2265 return DAG.getNode(ISD::TRUNCATE, MVT::i8,
2266 DAG.getNode(Opc, MVT::i16, N0, N1));
2274 //! Lower byte immediate operations for v16i8 vectors:
2276 LowerByteImmed(SDOperand Op, SelectionDAG &DAG) {
2279 MVT::ValueType VT = Op.getValueType();
2281 ConstVec = Op.getOperand(0);
2282 Arg = Op.getOperand(1);
2283 if (ConstVec.Val->getOpcode() != ISD::BUILD_VECTOR) {
2284 if (ConstVec.Val->getOpcode() == ISD::BIT_CONVERT) {
2285 ConstVec = ConstVec.getOperand(0);
2287 ConstVec = Op.getOperand(1);
2288 Arg = Op.getOperand(0);
2289 if (ConstVec.Val->getOpcode() == ISD::BIT_CONVERT) {
2290 ConstVec = ConstVec.getOperand(0);
2295 if (ConstVec.Val->getOpcode() == ISD::BUILD_VECTOR) {
2296 uint64_t VectorBits[2];
2297 uint64_t UndefBits[2];
2298 uint64_t SplatBits, SplatUndef;
2301 if (!GetConstantBuildVectorBits(ConstVec.Val, VectorBits, UndefBits)
2302 && isConstantSplat(VectorBits, UndefBits,
2303 MVT::getSizeInBits(MVT::getVectorElementType(VT)),
2304 SplatBits, SplatUndef, SplatSize)) {
2305 SDOperand tcVec[16];
2306 SDOperand tc = DAG.getTargetConstant(SplatBits & 0xff, MVT::i8);
2307 const size_t tcVecSize = sizeof(tcVec) / sizeof(tcVec[0]);
2309 // Turn the BUILD_VECTOR into a set of target constants:
2310 for (size_t i = 0; i < tcVecSize; ++i)
2313 return DAG.getNode(Op.Val->getOpcode(), VT, Arg,
2314 DAG.getNode(ISD::BUILD_VECTOR, VT, tcVec, tcVecSize));
2321 //! Lower i32 multiplication
2322 static SDOperand LowerMUL(SDOperand Op, SelectionDAG &DAG, unsigned VT,
2326 cerr << "CellSPU: Unknown LowerMUL value type, got "
2327 << MVT::getValueTypeString(Op.getValueType())
2333 SDOperand rA = Op.getOperand(0);
2334 SDOperand rB = Op.getOperand(1);
2336 return DAG.getNode(ISD::ADD, MVT::i32,
2337 DAG.getNode(ISD::ADD, MVT::i32,
2338 DAG.getNode(SPUISD::MPYH, MVT::i32, rA, rB),
2339 DAG.getNode(SPUISD::MPYH, MVT::i32, rB, rA)),
2340 DAG.getNode(SPUISD::MPYU, MVT::i32, rA, rB));
2347 //! Custom lowering for CTPOP (count population)
2349 Custom lowering code that counts the number ones in the input
2350 operand. SPU has such an instruction, but it counts the number of
2351 ones per byte, which then have to be accumulated.
2353 static SDOperand LowerCTPOP(SDOperand Op, SelectionDAG &DAG) {
2354 unsigned VT = Op.getValueType();
2355 unsigned vecVT = MVT::getVectorType(VT, (128 / MVT::getSizeInBits(VT)));
2359 SDOperand N = Op.getOperand(0);
2360 SDOperand Elt0 = DAG.getConstant(0, MVT::i32);
2362 SDOperand Promote = DAG.getNode(SPUISD::PROMOTE_SCALAR, vecVT, N, N);
2363 SDOperand CNTB = DAG.getNode(SPUISD::CNTB, vecVT, Promote);
2365 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i8, CNTB, Elt0);
2369 MachineFunction &MF = DAG.getMachineFunction();
2370 MachineRegisterInfo &RegInfo = MF.getRegInfo();
2372 unsigned CNTB_reg = RegInfo.createVirtualRegister(&SPU::R16CRegClass);
2374 SDOperand N = Op.getOperand(0);
2375 SDOperand Elt0 = DAG.getConstant(0, MVT::i16);
2376 SDOperand Mask0 = DAG.getConstant(0x0f, MVT::i16);
2377 SDOperand Shift1 = DAG.getConstant(8, MVT::i16);
2379 SDOperand Promote = DAG.getNode(SPUISD::PROMOTE_SCALAR, vecVT, N, N);
2380 SDOperand CNTB = DAG.getNode(SPUISD::CNTB, vecVT, Promote);
2382 // CNTB_result becomes the chain to which all of the virtual registers
2383 // CNTB_reg, SUM1_reg become associated:
2384 SDOperand CNTB_result =
2385 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i16, CNTB, Elt0);
2387 SDOperand CNTB_rescopy =
2388 DAG.getCopyToReg(CNTB_result, CNTB_reg, CNTB_result);
2390 SDOperand Tmp1 = DAG.getCopyFromReg(CNTB_rescopy, CNTB_reg, MVT::i16);
2392 return DAG.getNode(ISD::AND, MVT::i16,
2393 DAG.getNode(ISD::ADD, MVT::i16,
2394 DAG.getNode(ISD::SRL, MVT::i16,
2401 MachineFunction &MF = DAG.getMachineFunction();
2402 MachineRegisterInfo &RegInfo = MF.getRegInfo();
2404 unsigned CNTB_reg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
2405 unsigned SUM1_reg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
2407 SDOperand N = Op.getOperand(0);
2408 SDOperand Elt0 = DAG.getConstant(0, MVT::i32);
2409 SDOperand Mask0 = DAG.getConstant(0xff, MVT::i32);
2410 SDOperand Shift1 = DAG.getConstant(16, MVT::i32);
2411 SDOperand Shift2 = DAG.getConstant(8, MVT::i32);
2413 SDOperand Promote = DAG.getNode(SPUISD::PROMOTE_SCALAR, vecVT, N, N);
2414 SDOperand CNTB = DAG.getNode(SPUISD::CNTB, vecVT, Promote);
2416 // CNTB_result becomes the chain to which all of the virtual registers
2417 // CNTB_reg, SUM1_reg become associated:
2418 SDOperand CNTB_result =
2419 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, MVT::i32, CNTB, Elt0);
2421 SDOperand CNTB_rescopy =
2422 DAG.getCopyToReg(CNTB_result, CNTB_reg, CNTB_result);
2425 DAG.getNode(ISD::SRL, MVT::i32,
2426 DAG.getCopyFromReg(CNTB_rescopy, CNTB_reg, MVT::i32), Shift1);
2429 DAG.getNode(ISD::ADD, MVT::i32,
2430 Comp1, DAG.getCopyFromReg(CNTB_rescopy, CNTB_reg, MVT::i32));
2432 SDOperand Sum1_rescopy =
2433 DAG.getCopyToReg(CNTB_result, SUM1_reg, Sum1);
2436 DAG.getNode(ISD::SRL, MVT::i32,
2437 DAG.getCopyFromReg(Sum1_rescopy, SUM1_reg, MVT::i32),
2440 DAG.getNode(ISD::ADD, MVT::i32, Comp2,
2441 DAG.getCopyFromReg(Sum1_rescopy, SUM1_reg, MVT::i32));
2443 return DAG.getNode(ISD::AND, MVT::i32, Sum2, Mask0);
2453 /// LowerOperation - Provide custom lowering hooks for some operations.
2456 SPUTargetLowering::LowerOperation(SDOperand Op, SelectionDAG &DAG)
2458 switch (Op.getOpcode()) {
2460 cerr << "SPUTargetLowering::LowerOperation(): need to lower this!\n";
2461 cerr << "Op.getOpcode() = " << Op.getOpcode() << "\n";
2462 cerr << "*Op.Val:\n";
2469 return LowerLOAD(Op, DAG, SPUTM.getSubtargetImpl());
2471 return LowerSTORE(Op, DAG, SPUTM.getSubtargetImpl());
2472 case ISD::ConstantPool:
2473 return LowerConstantPool(Op, DAG, SPUTM.getSubtargetImpl());
2474 case ISD::GlobalAddress:
2475 return LowerGlobalAddress(Op, DAG, SPUTM.getSubtargetImpl());
2476 case ISD::JumpTable:
2477 return LowerJumpTable(Op, DAG, SPUTM.getSubtargetImpl());
2479 return LowerConstant(Op, DAG);
2480 case ISD::ConstantFP:
2481 return LowerConstantFP(Op, DAG);
2483 return LowerBRCOND(Op, DAG);
2484 case ISD::FORMAL_ARGUMENTS:
2485 return LowerFORMAL_ARGUMENTS(Op, DAG, VarArgsFrameIndex);
2487 return LowerCALL(Op, DAG, SPUTM.getSubtargetImpl());
2489 return LowerRET(Op, DAG, getTargetMachine());
2498 return LowerI8Math(Op, DAG, Op.getOpcode());
2500 // Vector-related lowering.
2501 case ISD::BUILD_VECTOR:
2502 return LowerBUILD_VECTOR(Op, DAG);
2503 case ISD::SCALAR_TO_VECTOR:
2504 return LowerSCALAR_TO_VECTOR(Op, DAG);
2505 case ISD::VECTOR_SHUFFLE:
2506 return LowerVECTOR_SHUFFLE(Op, DAG);
2507 case ISD::EXTRACT_VECTOR_ELT:
2508 return LowerEXTRACT_VECTOR_ELT(Op, DAG);
2509 case ISD::INSERT_VECTOR_ELT:
2510 return LowerINSERT_VECTOR_ELT(Op, DAG);
2512 // Look for ANDBI, ORBI and XORBI opportunities and lower appropriately:
2516 return LowerByteImmed(Op, DAG);
2518 // Vector and i8 multiply:
2520 if (MVT::isVector(Op.getValueType()))
2521 return LowerVectorMUL(Op, DAG);
2522 else if (Op.getValueType() == MVT::i8)
2523 return LowerI8Math(Op, DAG, Op.getOpcode());
2525 return LowerMUL(Op, DAG, Op.getValueType(), Op.getOpcode());
2528 if (Op.getValueType() == MVT::f32 || Op.getValueType() == MVT::v4f32)
2529 return LowerFDIVf32(Op, DAG);
2530 // else if (Op.getValueType() == MVT::f64)
2531 // return LowerFDIVf64(Op, DAG);
2533 assert(0 && "Calling FDIV on unsupported MVT");
2536 return LowerCTPOP(Op, DAG);
2542 //===----------------------------------------------------------------------===//
2543 // Target Optimization Hooks
2544 //===----------------------------------------------------------------------===//
2547 SPUTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const
2550 TargetMachine &TM = getTargetMachine();
2552 const SPUSubtarget *ST = SPUTM.getSubtargetImpl();
2553 SelectionDAG &DAG = DCI.DAG;
2554 SDOperand N0 = N->getOperand(0); // everything has at least one operand
2556 switch (N->getOpcode()) {
2558 case SPUISD::IndirectAddr: {
2559 if (!ST->usingLargeMem() && N0.getOpcode() == SPUISD::AFormAddr) {
2560 ConstantSDNode *CN = cast<ConstantSDNode>(N->getOperand(1));
2561 if (CN->getValue() == 0) {
2562 // (SPUindirect (SPUaform <addr>, 0), 0) ->
2563 // (SPUaform <addr>, 0)
2565 DEBUG(cerr << "Replace: ");
2566 DEBUG(N->dump(&DAG));
2567 DEBUG(cerr << "\nWith: ");
2568 DEBUG(N0.Val->dump(&DAG));
2569 DEBUG(cerr << "\n");
2576 SDOperand Op0 = N->getOperand(0);
2577 SDOperand Op1 = N->getOperand(1);
2579 if ((Op1.getOpcode() == ISD::Constant
2580 || Op1.getOpcode() == ISD::TargetConstant)
2581 && Op0.getOpcode() == SPUISD::IndirectAddr) {
2582 SDOperand Op01 = Op0.getOperand(1);
2583 if (Op01.getOpcode() == ISD::Constant
2584 || Op01.getOpcode() == ISD::TargetConstant) {
2585 // (add <const>, (SPUindirect <arg>, <const>)) ->
2586 // (SPUindirect <arg>, <const + const>)
2587 ConstantSDNode *CN0 = cast<ConstantSDNode>(Op1);
2588 ConstantSDNode *CN1 = cast<ConstantSDNode>(Op01);
2589 SDOperand combinedConst =
2590 DAG.getConstant(CN0->getValue() + CN1->getValue(),
2591 Op0.getValueType());
2593 DEBUG(cerr << "Replace: (add " << CN0->getValue() << ", "
2594 << "(SPUindirect <arg>, " << CN1->getValue() << "))\n");
2595 DEBUG(cerr << "With: (SPUindirect <arg>, "
2596 << CN0->getValue() + CN1->getValue() << ")\n");
2597 return DAG.getNode(SPUISD::IndirectAddr, Op0.getValueType(),
2598 Op0.getOperand(0), combinedConst);
2600 } else if ((Op0.getOpcode() == ISD::Constant
2601 || Op0.getOpcode() == ISD::TargetConstant)
2602 && Op1.getOpcode() == SPUISD::IndirectAddr) {
2603 SDOperand Op11 = Op1.getOperand(1);
2604 if (Op11.getOpcode() == ISD::Constant
2605 || Op11.getOpcode() == ISD::TargetConstant) {
2606 // (add (SPUindirect <arg>, <const>), <const>) ->
2607 // (SPUindirect <arg>, <const + const>)
2608 ConstantSDNode *CN0 = cast<ConstantSDNode>(Op0);
2609 ConstantSDNode *CN1 = cast<ConstantSDNode>(Op11);
2610 SDOperand combinedConst =
2611 DAG.getConstant(CN0->getValue() + CN1->getValue(),
2612 Op0.getValueType());
2614 DEBUG(cerr << "Replace: (add " << CN0->getValue() << ", "
2615 << "(SPUindirect <arg>, " << CN1->getValue() << "))\n");
2616 DEBUG(cerr << "With: (SPUindirect <arg>, "
2617 << CN0->getValue() + CN1->getValue() << ")\n");
2619 return DAG.getNode(SPUISD::IndirectAddr, Op1.getValueType(),
2620 Op1.getOperand(0), combinedConst);
2625 // Otherwise, return unchanged.
2629 //===----------------------------------------------------------------------===//
2630 // Inline Assembly Support
2631 //===----------------------------------------------------------------------===//
2633 /// getConstraintType - Given a constraint letter, return the type of
2634 /// constraint it is for this target.
2635 SPUTargetLowering::ConstraintType
2636 SPUTargetLowering::getConstraintType(const std::string &ConstraintLetter) const {
2637 if (ConstraintLetter.size() == 1) {
2638 switch (ConstraintLetter[0]) {
2645 return C_RegisterClass;
2648 return TargetLowering::getConstraintType(ConstraintLetter);
2651 std::pair<unsigned, const TargetRegisterClass*>
2652 SPUTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
2653 MVT::ValueType VT) const
2655 if (Constraint.size() == 1) {
2656 // GCC RS6000 Constraint Letters
2657 switch (Constraint[0]) {
2661 return std::make_pair(0U, SPU::R64CRegisterClass);
2662 return std::make_pair(0U, SPU::R32CRegisterClass);
2665 return std::make_pair(0U, SPU::R32FPRegisterClass);
2666 else if (VT == MVT::f64)
2667 return std::make_pair(0U, SPU::R64FPRegisterClass);
2670 return std::make_pair(0U, SPU::GPRCRegisterClass);
2674 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
2678 SPUTargetLowering::computeMaskedBitsForTargetNode(const SDOperand Op,
2682 const SelectionDAG &DAG,
2683 unsigned Depth ) const {
2684 KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
2687 // LowerAsmOperandForConstraint
2689 SPUTargetLowering::LowerAsmOperandForConstraint(SDOperand Op,
2690 char ConstraintLetter,
2691 std::vector<SDOperand> &Ops,
2692 SelectionDAG &DAG) {
2693 // Default, for the time being, to the base class handler
2694 TargetLowering::LowerAsmOperandForConstraint(Op, ConstraintLetter, Ops, DAG);
2697 /// isLegalAddressImmediate - Return true if the integer value can be used
2698 /// as the offset of the target addressing mode.
2699 bool SPUTargetLowering::isLegalAddressImmediate(int64_t V, const Type *Ty) const {
2700 // SPU's addresses are 256K:
2701 return (V > -(1 << 18) && V < (1 << 18) - 1);
2704 bool SPUTargetLowering::isLegalAddressImmediate(llvm::GlobalValue* GV) const {