2 //===-- 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 "SPUFrameInfo.h"
18 #include "llvm/Constants.h"
19 #include "llvm/Function.h"
20 #include "llvm/Intrinsics.h"
21 #include "llvm/CallingConv.h"
22 #include "llvm/CodeGen/CallingConvLower.h"
23 #include "llvm/CodeGen/MachineFrameInfo.h"
24 #include "llvm/CodeGen/MachineFunction.h"
25 #include "llvm/CodeGen/MachineInstrBuilder.h"
26 #include "llvm/CodeGen/MachineRegisterInfo.h"
27 #include "llvm/CodeGen/SelectionDAG.h"
28 #include "llvm/Target/TargetLoweringObjectFile.h"
29 #include "llvm/Target/TargetOptions.h"
30 #include "llvm/ADT/VectorExtras.h"
31 #include "llvm/Support/Debug.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/MathExtras.h"
34 #include "llvm/Support/raw_ostream.h"
39 // Used in getTargetNodeName() below
41 std::map<unsigned, const char *> node_names;
43 //! EVT mapping to useful data for Cell SPU
44 struct valtype_map_s {
46 const int prefslot_byte;
49 const valtype_map_s valtype_map[] = {
60 const size_t n_valtype_map = sizeof(valtype_map) / sizeof(valtype_map[0]);
62 const valtype_map_s *getValueTypeMapEntry(EVT VT) {
63 const valtype_map_s *retval = 0;
65 for (size_t i = 0; i < n_valtype_map; ++i) {
66 if (valtype_map[i].valtype == VT) {
67 retval = valtype_map + i;
75 raw_string_ostream Msg(msg);
76 Msg << "getValueTypeMapEntry returns NULL for "
78 llvm_report_error(Msg.str());
85 //! Expand a library call into an actual call DAG node
88 This code is taken from SelectionDAGLegalize, since it is not exposed as
89 part of the LLVM SelectionDAG API.
93 ExpandLibCall(RTLIB::Libcall LC, SDValue Op, SelectionDAG &DAG,
94 bool isSigned, SDValue &Hi, SPUTargetLowering &TLI) {
95 // The input chain to this libcall is the entry node of the function.
96 // Legalizing the call will automatically add the previous call to the
98 SDValue InChain = DAG.getEntryNode();
100 TargetLowering::ArgListTy Args;
101 TargetLowering::ArgListEntry Entry;
102 for (unsigned i = 0, e = Op.getNumOperands(); i != e; ++i) {
103 EVT ArgVT = Op.getOperand(i).getValueType();
104 const Type *ArgTy = ArgVT.getTypeForEVT(*DAG.getContext());
105 Entry.Node = Op.getOperand(i);
107 Entry.isSExt = isSigned;
108 Entry.isZExt = !isSigned;
109 Args.push_back(Entry);
111 SDValue Callee = DAG.getExternalSymbol(TLI.getLibcallName(LC),
114 // Splice the libcall in wherever FindInputOutputChains tells us to.
116 Op.getNode()->getValueType(0).getTypeForEVT(*DAG.getContext());
117 std::pair<SDValue, SDValue> CallInfo =
118 TLI.LowerCallTo(InChain, RetTy, isSigned, !isSigned, false, false,
119 0, TLI.getLibcallCallingConv(LC), false,
120 /*isReturnValueUsed=*/true,
124 return CallInfo.first;
128 SPUTargetLowering::SPUTargetLowering(SPUTargetMachine &TM)
129 : TargetLowering(TM, new TargetLoweringObjectFileELF()),
131 // Fold away setcc operations if possible.
134 // Use _setjmp/_longjmp instead of setjmp/longjmp.
135 setUseUnderscoreSetJmp(true);
136 setUseUnderscoreLongJmp(true);
138 // Set RTLIB libcall names as used by SPU:
139 setLibcallName(RTLIB::DIV_F64, "__fast_divdf3");
141 // Set up the SPU's register classes:
142 addRegisterClass(MVT::i8, SPU::R8CRegisterClass);
143 addRegisterClass(MVT::i16, SPU::R16CRegisterClass);
144 addRegisterClass(MVT::i32, SPU::R32CRegisterClass);
145 addRegisterClass(MVT::i64, SPU::R64CRegisterClass);
146 addRegisterClass(MVT::f32, SPU::R32FPRegisterClass);
147 addRegisterClass(MVT::f64, SPU::R64FPRegisterClass);
148 addRegisterClass(MVT::i128, SPU::GPRCRegisterClass);
150 // SPU has no sign or zero extended loads for i1, i8, i16:
151 setLoadExtAction(ISD::EXTLOAD, MVT::i1, Promote);
152 setLoadExtAction(ISD::SEXTLOAD, MVT::i1, Promote);
153 setLoadExtAction(ISD::ZEXTLOAD, MVT::i1, Promote);
155 setLoadExtAction(ISD::EXTLOAD, MVT::f32, Expand);
156 setLoadExtAction(ISD::EXTLOAD, MVT::f64, Expand);
158 setTruncStoreAction(MVT::i128, MVT::i64, Expand);
159 setTruncStoreAction(MVT::i128, MVT::i32, Expand);
160 setTruncStoreAction(MVT::i128, MVT::i16, Expand);
161 setTruncStoreAction(MVT::i128, MVT::i8, Expand);
163 setTruncStoreAction(MVT::f64, MVT::f32, Expand);
165 // SPU constant load actions are custom lowered:
166 setOperationAction(ISD::ConstantFP, MVT::f32, Legal);
167 setOperationAction(ISD::ConstantFP, MVT::f64, Custom);
169 // SPU's loads and stores have to be custom lowered:
170 for (unsigned sctype = (unsigned) MVT::i8; sctype < (unsigned) MVT::i128;
172 MVT::SimpleValueType VT = (MVT::SimpleValueType)sctype;
174 setOperationAction(ISD::LOAD, VT, Custom);
175 setOperationAction(ISD::STORE, VT, Custom);
176 setLoadExtAction(ISD::EXTLOAD, VT, Custom);
177 setLoadExtAction(ISD::ZEXTLOAD, VT, Custom);
178 setLoadExtAction(ISD::SEXTLOAD, VT, Custom);
180 for (unsigned stype = sctype - 1; stype >= (unsigned) MVT::i8; --stype) {
181 MVT::SimpleValueType StoreVT = (MVT::SimpleValueType) stype;
182 setTruncStoreAction(VT, StoreVT, Expand);
186 for (unsigned sctype = (unsigned) MVT::f32; sctype < (unsigned) MVT::f64;
188 MVT::SimpleValueType VT = (MVT::SimpleValueType) sctype;
190 setOperationAction(ISD::LOAD, VT, Custom);
191 setOperationAction(ISD::STORE, VT, Custom);
193 for (unsigned stype = sctype - 1; stype >= (unsigned) MVT::f32; --stype) {
194 MVT::SimpleValueType StoreVT = (MVT::SimpleValueType) stype;
195 setTruncStoreAction(VT, StoreVT, Expand);
199 // Expand the jumptable branches
200 setOperationAction(ISD::BR_JT, MVT::Other, Expand);
201 setOperationAction(ISD::BR_CC, MVT::Other, Expand);
203 // Custom lower SELECT_CC for most cases, but expand by default
204 setOperationAction(ISD::SELECT_CC, MVT::Other, Expand);
205 setOperationAction(ISD::SELECT_CC, MVT::i8, Custom);
206 setOperationAction(ISD::SELECT_CC, MVT::i16, Custom);
207 setOperationAction(ISD::SELECT_CC, MVT::i32, Custom);
208 setOperationAction(ISD::SELECT_CC, MVT::i64, Custom);
210 // SPU has no intrinsics for these particular operations:
211 setOperationAction(ISD::MEMBARRIER, MVT::Other, Expand);
213 // SPU has no division/remainder instructions
214 setOperationAction(ISD::SREM, MVT::i8, Expand);
215 setOperationAction(ISD::UREM, MVT::i8, Expand);
216 setOperationAction(ISD::SDIV, MVT::i8, Expand);
217 setOperationAction(ISD::UDIV, MVT::i8, Expand);
218 setOperationAction(ISD::SDIVREM, MVT::i8, Expand);
219 setOperationAction(ISD::UDIVREM, MVT::i8, Expand);
220 setOperationAction(ISD::SREM, MVT::i16, Expand);
221 setOperationAction(ISD::UREM, MVT::i16, Expand);
222 setOperationAction(ISD::SDIV, MVT::i16, Expand);
223 setOperationAction(ISD::UDIV, MVT::i16, Expand);
224 setOperationAction(ISD::SDIVREM, MVT::i16, Expand);
225 setOperationAction(ISD::UDIVREM, MVT::i16, Expand);
226 setOperationAction(ISD::SREM, MVT::i32, Expand);
227 setOperationAction(ISD::UREM, MVT::i32, Expand);
228 setOperationAction(ISD::SDIV, MVT::i32, Expand);
229 setOperationAction(ISD::UDIV, MVT::i32, Expand);
230 setOperationAction(ISD::SDIVREM, MVT::i32, Expand);
231 setOperationAction(ISD::UDIVREM, MVT::i32, Expand);
232 setOperationAction(ISD::SREM, MVT::i64, Expand);
233 setOperationAction(ISD::UREM, MVT::i64, Expand);
234 setOperationAction(ISD::SDIV, MVT::i64, Expand);
235 setOperationAction(ISD::UDIV, MVT::i64, Expand);
236 setOperationAction(ISD::SDIVREM, MVT::i64, Expand);
237 setOperationAction(ISD::UDIVREM, MVT::i64, Expand);
238 setOperationAction(ISD::SREM, MVT::i128, Expand);
239 setOperationAction(ISD::UREM, MVT::i128, Expand);
240 setOperationAction(ISD::SDIV, MVT::i128, Expand);
241 setOperationAction(ISD::UDIV, MVT::i128, Expand);
242 setOperationAction(ISD::SDIVREM, MVT::i128, Expand);
243 setOperationAction(ISD::UDIVREM, MVT::i128, Expand);
245 // We don't support sin/cos/sqrt/fmod
246 setOperationAction(ISD::FSIN , MVT::f64, Expand);
247 setOperationAction(ISD::FCOS , MVT::f64, Expand);
248 setOperationAction(ISD::FREM , MVT::f64, Expand);
249 setOperationAction(ISD::FSIN , MVT::f32, Expand);
250 setOperationAction(ISD::FCOS , MVT::f32, Expand);
251 setOperationAction(ISD::FREM , MVT::f32, Expand);
253 // Expand fsqrt to the appropriate libcall (NOTE: should use h/w fsqrt
255 setOperationAction(ISD::FSQRT, MVT::f64, Expand);
256 setOperationAction(ISD::FSQRT, MVT::f32, Expand);
258 setOperationAction(ISD::FCOPYSIGN, MVT::f64, Expand);
259 setOperationAction(ISD::FCOPYSIGN, MVT::f32, Expand);
261 // SPU can do rotate right and left, so legalize it... but customize for i8
262 // because instructions don't exist.
264 // FIXME: Change from "expand" to appropriate type once ROTR is supported in
266 setOperationAction(ISD::ROTR, MVT::i32, Expand /*Legal*/);
267 setOperationAction(ISD::ROTR, MVT::i16, Expand /*Legal*/);
268 setOperationAction(ISD::ROTR, MVT::i8, Expand /*Custom*/);
270 setOperationAction(ISD::ROTL, MVT::i32, Legal);
271 setOperationAction(ISD::ROTL, MVT::i16, Legal);
272 setOperationAction(ISD::ROTL, MVT::i8, Custom);
274 // SPU has no native version of shift left/right for i8
275 setOperationAction(ISD::SHL, MVT::i8, Custom);
276 setOperationAction(ISD::SRL, MVT::i8, Custom);
277 setOperationAction(ISD::SRA, MVT::i8, Custom);
279 // Make these operations legal and handle them during instruction selection:
280 setOperationAction(ISD::SHL, MVT::i64, Legal);
281 setOperationAction(ISD::SRL, MVT::i64, Legal);
282 setOperationAction(ISD::SRA, MVT::i64, Legal);
284 // Custom lower i8, i32 and i64 multiplications
285 setOperationAction(ISD::MUL, MVT::i8, Custom);
286 setOperationAction(ISD::MUL, MVT::i32, Legal);
287 setOperationAction(ISD::MUL, MVT::i64, Legal);
289 // Expand double-width multiplication
290 // FIXME: It would probably be reasonable to support some of these operations
291 setOperationAction(ISD::UMUL_LOHI, MVT::i8, Expand);
292 setOperationAction(ISD::SMUL_LOHI, MVT::i8, Expand);
293 setOperationAction(ISD::MULHU, MVT::i8, Expand);
294 setOperationAction(ISD::MULHS, MVT::i8, Expand);
295 setOperationAction(ISD::UMUL_LOHI, MVT::i16, Expand);
296 setOperationAction(ISD::SMUL_LOHI, MVT::i16, Expand);
297 setOperationAction(ISD::MULHU, MVT::i16, Expand);
298 setOperationAction(ISD::MULHS, MVT::i16, Expand);
299 setOperationAction(ISD::UMUL_LOHI, MVT::i32, Expand);
300 setOperationAction(ISD::SMUL_LOHI, MVT::i32, Expand);
301 setOperationAction(ISD::MULHU, MVT::i32, Expand);
302 setOperationAction(ISD::MULHS, MVT::i32, Expand);
303 setOperationAction(ISD::UMUL_LOHI, MVT::i64, Expand);
304 setOperationAction(ISD::SMUL_LOHI, MVT::i64, Expand);
305 setOperationAction(ISD::MULHU, MVT::i64, Expand);
306 setOperationAction(ISD::MULHS, MVT::i64, Expand);
308 // Need to custom handle (some) common i8, i64 math ops
309 setOperationAction(ISD::ADD, MVT::i8, Custom);
310 setOperationAction(ISD::ADD, MVT::i64, Legal);
311 setOperationAction(ISD::SUB, MVT::i8, Custom);
312 setOperationAction(ISD::SUB, MVT::i64, Legal);
314 // SPU does not have BSWAP. It does have i32 support CTLZ.
315 // CTPOP has to be custom lowered.
316 setOperationAction(ISD::BSWAP, MVT::i32, Expand);
317 setOperationAction(ISD::BSWAP, MVT::i64, Expand);
319 setOperationAction(ISD::CTPOP, MVT::i8, Custom);
320 setOperationAction(ISD::CTPOP, MVT::i16, Custom);
321 setOperationAction(ISD::CTPOP, MVT::i32, Custom);
322 setOperationAction(ISD::CTPOP, MVT::i64, Custom);
323 setOperationAction(ISD::CTPOP, MVT::i128, Expand);
325 setOperationAction(ISD::CTTZ , MVT::i8, Expand);
326 setOperationAction(ISD::CTTZ , MVT::i16, Expand);
327 setOperationAction(ISD::CTTZ , MVT::i32, Expand);
328 setOperationAction(ISD::CTTZ , MVT::i64, Expand);
329 setOperationAction(ISD::CTTZ , MVT::i128, Expand);
331 setOperationAction(ISD::CTLZ , MVT::i8, Promote);
332 setOperationAction(ISD::CTLZ , MVT::i16, Promote);
333 setOperationAction(ISD::CTLZ , MVT::i32, Legal);
334 setOperationAction(ISD::CTLZ , MVT::i64, Expand);
335 setOperationAction(ISD::CTLZ , MVT::i128, Expand);
337 // SPU has a version of select that implements (a&~c)|(b&c), just like
338 // select ought to work:
339 setOperationAction(ISD::SELECT, MVT::i8, Legal);
340 setOperationAction(ISD::SELECT, MVT::i16, Legal);
341 setOperationAction(ISD::SELECT, MVT::i32, Legal);
342 setOperationAction(ISD::SELECT, MVT::i64, Legal);
344 setOperationAction(ISD::SETCC, MVT::i8, Legal);
345 setOperationAction(ISD::SETCC, MVT::i16, Legal);
346 setOperationAction(ISD::SETCC, MVT::i32, Legal);
347 setOperationAction(ISD::SETCC, MVT::i64, Legal);
348 setOperationAction(ISD::SETCC, MVT::f64, Custom);
350 // Custom lower i128 -> i64 truncates
351 setOperationAction(ISD::TRUNCATE, MVT::i64, Custom);
353 setOperationAction(ISD::FP_TO_SINT, MVT::i8, Promote);
354 setOperationAction(ISD::FP_TO_UINT, MVT::i8, Promote);
355 setOperationAction(ISD::FP_TO_SINT, MVT::i16, Promote);
356 setOperationAction(ISD::FP_TO_UINT, MVT::i16, Promote);
357 // SPU has a legal FP -> signed INT instruction for f32, but for f64, need
358 // to expand to a libcall, hence the custom lowering:
359 setOperationAction(ISD::FP_TO_SINT, MVT::i32, Custom);
360 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Custom);
361 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Expand);
362 setOperationAction(ISD::FP_TO_UINT, MVT::i64, Expand);
363 setOperationAction(ISD::FP_TO_SINT, MVT::i128, Expand);
364 setOperationAction(ISD::FP_TO_UINT, MVT::i128, Expand);
366 // FDIV on SPU requires custom lowering
367 setOperationAction(ISD::FDIV, MVT::f64, Expand); // to libcall
369 // SPU has [U|S]INT_TO_FP for f32->i32, but not for f64->i32, f64->i64:
370 setOperationAction(ISD::SINT_TO_FP, MVT::i32, Custom);
371 setOperationAction(ISD::SINT_TO_FP, MVT::i16, Promote);
372 setOperationAction(ISD::SINT_TO_FP, MVT::i8, Promote);
373 setOperationAction(ISD::UINT_TO_FP, MVT::i32, Custom);
374 setOperationAction(ISD::UINT_TO_FP, MVT::i16, Promote);
375 setOperationAction(ISD::UINT_TO_FP, MVT::i8, Promote);
376 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
377 setOperationAction(ISD::UINT_TO_FP, MVT::i64, Custom);
379 setOperationAction(ISD::BIT_CONVERT, MVT::i32, Legal);
380 setOperationAction(ISD::BIT_CONVERT, MVT::f32, Legal);
381 setOperationAction(ISD::BIT_CONVERT, MVT::i64, Legal);
382 setOperationAction(ISD::BIT_CONVERT, MVT::f64, Legal);
384 // We cannot sextinreg(i1). Expand to shifts.
385 setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i1, Expand);
387 // Support label based line numbers.
388 setOperationAction(ISD::DBG_STOPPOINT, MVT::Other, Expand);
389 setOperationAction(ISD::DEBUG_LOC, MVT::Other, Expand);
391 // We want to legalize GlobalAddress and ConstantPool nodes into the
392 // appropriate instructions to materialize the address.
393 for (unsigned sctype = (unsigned) MVT::i8; sctype < (unsigned) MVT::f128;
395 MVT::SimpleValueType VT = (MVT::SimpleValueType)sctype;
397 setOperationAction(ISD::GlobalAddress, VT, Custom);
398 setOperationAction(ISD::ConstantPool, VT, Custom);
399 setOperationAction(ISD::JumpTable, VT, Custom);
402 // VASTART needs to be custom lowered to use the VarArgsFrameIndex
403 setOperationAction(ISD::VASTART , MVT::Other, Custom);
405 // Use the default implementation.
406 setOperationAction(ISD::VAARG , MVT::Other, Expand);
407 setOperationAction(ISD::VACOPY , MVT::Other, Expand);
408 setOperationAction(ISD::VAEND , MVT::Other, Expand);
409 setOperationAction(ISD::STACKSAVE , MVT::Other, Expand);
410 setOperationAction(ISD::STACKRESTORE , MVT::Other, Expand);
411 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32 , Expand);
412 setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i64 , Expand);
414 // Cell SPU has instructions for converting between i64 and fp.
415 setOperationAction(ISD::FP_TO_SINT, MVT::i64, Custom);
416 setOperationAction(ISD::SINT_TO_FP, MVT::i64, Custom);
418 // To take advantage of the above i64 FP_TO_SINT, promote i32 FP_TO_UINT
419 setOperationAction(ISD::FP_TO_UINT, MVT::i32, Promote);
421 // BUILD_PAIR can't be handled natively, and should be expanded to shl/or
422 setOperationAction(ISD::BUILD_PAIR, MVT::i64, Expand);
424 // First set operation action for all vector types to expand. Then we
425 // will selectively turn on ones that can be effectively codegen'd.
426 addRegisterClass(MVT::v16i8, SPU::VECREGRegisterClass);
427 addRegisterClass(MVT::v8i16, SPU::VECREGRegisterClass);
428 addRegisterClass(MVT::v4i32, SPU::VECREGRegisterClass);
429 addRegisterClass(MVT::v2i64, SPU::VECREGRegisterClass);
430 addRegisterClass(MVT::v4f32, SPU::VECREGRegisterClass);
431 addRegisterClass(MVT::v2f64, SPU::VECREGRegisterClass);
433 // "Odd size" vector classes that we're willing to support:
434 addRegisterClass(MVT::v2i32, SPU::VECREGRegisterClass);
436 for (unsigned i = (unsigned)MVT::FIRST_VECTOR_VALUETYPE;
437 i <= (unsigned)MVT::LAST_VECTOR_VALUETYPE; ++i) {
438 MVT::SimpleValueType VT = (MVT::SimpleValueType)i;
440 // add/sub are legal for all supported vector VT's.
441 setOperationAction(ISD::ADD, VT, Legal);
442 setOperationAction(ISD::SUB, VT, Legal);
443 // mul has to be custom lowered.
444 setOperationAction(ISD::MUL, VT, Legal);
446 setOperationAction(ISD::AND, VT, Legal);
447 setOperationAction(ISD::OR, VT, Legal);
448 setOperationAction(ISD::XOR, VT, Legal);
449 setOperationAction(ISD::LOAD, VT, Legal);
450 setOperationAction(ISD::SELECT, VT, Legal);
451 setOperationAction(ISD::STORE, VT, Legal);
453 // These operations need to be expanded:
454 setOperationAction(ISD::SDIV, VT, Expand);
455 setOperationAction(ISD::SREM, VT, Expand);
456 setOperationAction(ISD::UDIV, VT, Expand);
457 setOperationAction(ISD::UREM, VT, Expand);
459 // Custom lower build_vector, constant pool spills, insert and
460 // extract vector elements:
461 setOperationAction(ISD::BUILD_VECTOR, VT, Custom);
462 setOperationAction(ISD::ConstantPool, VT, Custom);
463 setOperationAction(ISD::SCALAR_TO_VECTOR, VT, Custom);
464 setOperationAction(ISD::EXTRACT_VECTOR_ELT, VT, Custom);
465 setOperationAction(ISD::INSERT_VECTOR_ELT, VT, Custom);
466 setOperationAction(ISD::VECTOR_SHUFFLE, VT, Custom);
469 setOperationAction(ISD::AND, MVT::v16i8, Custom);
470 setOperationAction(ISD::OR, MVT::v16i8, Custom);
471 setOperationAction(ISD::XOR, MVT::v16i8, Custom);
472 setOperationAction(ISD::SCALAR_TO_VECTOR, MVT::v4f32, Custom);
474 setOperationAction(ISD::FDIV, MVT::v4f32, Legal);
476 setShiftAmountType(MVT::i32);
477 setBooleanContents(ZeroOrNegativeOneBooleanContent);
479 setStackPointerRegisterToSaveRestore(SPU::R1);
481 // We have target-specific dag combine patterns for the following nodes:
482 setTargetDAGCombine(ISD::ADD);
483 setTargetDAGCombine(ISD::ZERO_EXTEND);
484 setTargetDAGCombine(ISD::SIGN_EXTEND);
485 setTargetDAGCombine(ISD::ANY_EXTEND);
487 computeRegisterProperties();
489 // Set pre-RA register scheduler default to BURR, which produces slightly
490 // better code than the default (could also be TDRR, but TargetLowering.h
491 // needs a mod to support that model):
492 setSchedulingPreference(SchedulingForRegPressure);
496 SPUTargetLowering::getTargetNodeName(unsigned Opcode) const
498 if (node_names.empty()) {
499 node_names[(unsigned) SPUISD::RET_FLAG] = "SPUISD::RET_FLAG";
500 node_names[(unsigned) SPUISD::Hi] = "SPUISD::Hi";
501 node_names[(unsigned) SPUISD::Lo] = "SPUISD::Lo";
502 node_names[(unsigned) SPUISD::PCRelAddr] = "SPUISD::PCRelAddr";
503 node_names[(unsigned) SPUISD::AFormAddr] = "SPUISD::AFormAddr";
504 node_names[(unsigned) SPUISD::IndirectAddr] = "SPUISD::IndirectAddr";
505 node_names[(unsigned) SPUISD::LDRESULT] = "SPUISD::LDRESULT";
506 node_names[(unsigned) SPUISD::CALL] = "SPUISD::CALL";
507 node_names[(unsigned) SPUISD::SHUFB] = "SPUISD::SHUFB";
508 node_names[(unsigned) SPUISD::SHUFFLE_MASK] = "SPUISD::SHUFFLE_MASK";
509 node_names[(unsigned) SPUISD::CNTB] = "SPUISD::CNTB";
510 node_names[(unsigned) SPUISD::PREFSLOT2VEC] = "SPUISD::PREFSLOT2VEC";
511 node_names[(unsigned) SPUISD::VEC2PREFSLOT] = "SPUISD::VEC2PREFSLOT";
512 node_names[(unsigned) SPUISD::SHLQUAD_L_BITS] = "SPUISD::SHLQUAD_L_BITS";
513 node_names[(unsigned) SPUISD::SHLQUAD_L_BYTES] = "SPUISD::SHLQUAD_L_BYTES";
514 node_names[(unsigned) SPUISD::VEC_SHL] = "SPUISD::VEC_SHL";
515 node_names[(unsigned) SPUISD::VEC_SRL] = "SPUISD::VEC_SRL";
516 node_names[(unsigned) SPUISD::VEC_SRA] = "SPUISD::VEC_SRA";
517 node_names[(unsigned) SPUISD::VEC_ROTL] = "SPUISD::VEC_ROTL";
518 node_names[(unsigned) SPUISD::VEC_ROTR] = "SPUISD::VEC_ROTR";
519 node_names[(unsigned) SPUISD::ROTBYTES_LEFT] = "SPUISD::ROTBYTES_LEFT";
520 node_names[(unsigned) SPUISD::ROTBYTES_LEFT_BITS] =
521 "SPUISD::ROTBYTES_LEFT_BITS";
522 node_names[(unsigned) SPUISD::SELECT_MASK] = "SPUISD::SELECT_MASK";
523 node_names[(unsigned) SPUISD::SELB] = "SPUISD::SELB";
524 node_names[(unsigned) SPUISD::ADD64_MARKER] = "SPUISD::ADD64_MARKER";
525 node_names[(unsigned) SPUISD::SUB64_MARKER] = "SPUISD::SUB64_MARKER";
526 node_names[(unsigned) SPUISD::MUL64_MARKER] = "SPUISD::MUL64_MARKER";
529 std::map<unsigned, const char *>::iterator i = node_names.find(Opcode);
531 return ((i != node_names.end()) ? i->second : 0);
534 /// getFunctionAlignment - Return the Log2 alignment of this function.
535 unsigned SPUTargetLowering::getFunctionAlignment(const Function *) const {
539 //===----------------------------------------------------------------------===//
540 // Return the Cell SPU's SETCC result type
541 //===----------------------------------------------------------------------===//
543 MVT::SimpleValueType SPUTargetLowering::getSetCCResultType(EVT VT) const {
544 // i16 and i32 are valid SETCC result types
545 return ((VT == MVT::i8 || VT == MVT::i16 || VT == MVT::i32) ?
546 VT.getSimpleVT().SimpleTy :
550 //===----------------------------------------------------------------------===//
551 // Calling convention code:
552 //===----------------------------------------------------------------------===//
554 #include "SPUGenCallingConv.inc"
556 //===----------------------------------------------------------------------===//
557 // LowerOperation implementation
558 //===----------------------------------------------------------------------===//
560 /// Custom lower loads for CellSPU
562 All CellSPU loads and stores are aligned to 16-byte boundaries, so for elements
563 within a 16-byte block, we have to rotate to extract the requested element.
565 For extending loads, we also want to ensure that the following sequence is
566 emitted, e.g. for MVT::f32 extending load to MVT::f64:
570 %2 v16i8,ch = rotate %1
571 %3 v4f8, ch = bitconvert %2
572 %4 f32 = vec2perfslot %3
573 %5 f64 = fp_extend %4
577 LowerLOAD(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
578 LoadSDNode *LN = cast<LoadSDNode>(Op);
579 SDValue the_chain = LN->getChain();
580 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
581 EVT InVT = LN->getMemoryVT();
582 EVT OutVT = Op.getValueType();
583 ISD::LoadExtType ExtType = LN->getExtensionType();
584 unsigned alignment = LN->getAlignment();
585 const valtype_map_s *vtm = getValueTypeMapEntry(InVT);
586 DebugLoc dl = Op.getDebugLoc();
588 switch (LN->getAddressingMode()) {
589 case ISD::UNINDEXED: {
591 SDValue basePtr = LN->getBasePtr();
594 if (alignment == 16) {
597 // Special cases for a known aligned load to simplify the base pointer
598 // and the rotation amount:
599 if (basePtr.getOpcode() == ISD::ADD
600 && (CN = dyn_cast<ConstantSDNode > (basePtr.getOperand(1))) != 0) {
601 // Known offset into basePtr
602 int64_t offset = CN->getSExtValue();
603 int64_t rotamt = int64_t((offset & 0xf) - vtm->prefslot_byte);
608 rotate = DAG.getConstant(rotamt, MVT::i16);
610 // Simplify the base pointer for this case:
611 basePtr = basePtr.getOperand(0);
612 if ((offset & ~0xf) > 0) {
613 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
615 DAG.getConstant((offset & ~0xf), PtrVT));
617 } else if ((basePtr.getOpcode() == SPUISD::AFormAddr)
618 || (basePtr.getOpcode() == SPUISD::IndirectAddr
619 && basePtr.getOperand(0).getOpcode() == SPUISD::Hi
620 && basePtr.getOperand(1).getOpcode() == SPUISD::Lo)) {
621 // Plain aligned a-form address: rotate into preferred slot
622 // Same for (SPUindirect (SPUhi ...), (SPUlo ...))
623 int64_t rotamt = -vtm->prefslot_byte;
626 rotate = DAG.getConstant(rotamt, MVT::i16);
628 // Offset the rotate amount by the basePtr and the preferred slot
630 int64_t rotamt = -vtm->prefslot_byte;
633 rotate = DAG.getNode(ISD::ADD, dl, PtrVT,
635 DAG.getConstant(rotamt, PtrVT));
638 // Unaligned load: must be more pessimistic about addressing modes:
639 if (basePtr.getOpcode() == ISD::ADD) {
640 MachineFunction &MF = DAG.getMachineFunction();
641 MachineRegisterInfo &RegInfo = MF.getRegInfo();
642 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
645 SDValue Op0 = basePtr.getOperand(0);
646 SDValue Op1 = basePtr.getOperand(1);
648 if (isa<ConstantSDNode>(Op1)) {
649 // Convert the (add <ptr>, <const>) to an indirect address contained
650 // in a register. Note that this is done because we need to avoid
651 // creating a 0(reg) d-form address due to the SPU's block loads.
652 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Op0, Op1);
653 the_chain = DAG.getCopyToReg(the_chain, dl, VReg, basePtr, Flag);
654 basePtr = DAG.getCopyFromReg(the_chain, dl, VReg, PtrVT);
656 // Convert the (add <arg1>, <arg2>) to an indirect address, which
657 // will likely be lowered as a reg(reg) x-form address.
658 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Op0, Op1);
661 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
663 DAG.getConstant(0, PtrVT));
666 // Offset the rotate amount by the basePtr and the preferred slot
668 rotate = DAG.getNode(ISD::ADD, dl, PtrVT,
670 DAG.getConstant(-vtm->prefslot_byte, PtrVT));
673 // Re-emit as a v16i8 vector load
674 result = DAG.getLoad(MVT::v16i8, dl, the_chain, basePtr,
675 LN->getSrcValue(), LN->getSrcValueOffset(),
676 LN->isVolatile(), 16);
679 the_chain = result.getValue(1);
681 // Rotate into the preferred slot:
682 result = DAG.getNode(SPUISD::ROTBYTES_LEFT, dl, MVT::v16i8,
683 result.getValue(0), rotate);
685 // Convert the loaded v16i8 vector to the appropriate vector type
686 // specified by the operand:
687 EVT vecVT = EVT::getVectorVT(*DAG.getContext(),
688 InVT, (128 / InVT.getSizeInBits()));
689 result = DAG.getNode(SPUISD::VEC2PREFSLOT, dl, InVT,
690 DAG.getNode(ISD::BIT_CONVERT, dl, vecVT, result));
692 // Handle extending loads by extending the scalar result:
693 if (ExtType == ISD::SEXTLOAD) {
694 result = DAG.getNode(ISD::SIGN_EXTEND, dl, OutVT, result);
695 } else if (ExtType == ISD::ZEXTLOAD) {
696 result = DAG.getNode(ISD::ZERO_EXTEND, dl, OutVT, result);
697 } else if (ExtType == ISD::EXTLOAD) {
698 unsigned NewOpc = ISD::ANY_EXTEND;
700 if (OutVT.isFloatingPoint())
701 NewOpc = ISD::FP_EXTEND;
703 result = DAG.getNode(NewOpc, dl, OutVT, result);
706 SDVTList retvts = DAG.getVTList(OutVT, MVT::Other);
707 SDValue retops[2] = {
712 result = DAG.getNode(SPUISD::LDRESULT, dl, retvts,
713 retops, sizeof(retops) / sizeof(retops[0]));
720 case ISD::LAST_INDEXED_MODE:
723 raw_string_ostream Msg(msg);
724 Msg << "LowerLOAD: Got a LoadSDNode with an addr mode other than "
726 Msg << (unsigned) LN->getAddressingMode();
727 llvm_report_error(Msg.str());
735 /// Custom lower stores for CellSPU
737 All CellSPU stores are aligned to 16-byte boundaries, so for elements
738 within a 16-byte block, we have to generate a shuffle to insert the
739 requested element into its place, then store the resulting block.
742 LowerSTORE(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
743 StoreSDNode *SN = cast<StoreSDNode>(Op);
744 SDValue Value = SN->getValue();
745 EVT VT = Value.getValueType();
746 EVT StVT = (!SN->isTruncatingStore() ? VT : SN->getMemoryVT());
747 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
748 DebugLoc dl = Op.getDebugLoc();
749 unsigned alignment = SN->getAlignment();
751 switch (SN->getAddressingMode()) {
752 case ISD::UNINDEXED: {
753 // The vector type we really want to load from the 16-byte chunk.
754 EVT vecVT = EVT::getVectorVT(*DAG.getContext(),
755 VT, (128 / VT.getSizeInBits())),
756 stVecVT = EVT::getVectorVT(*DAG.getContext(),
757 StVT, (128 / StVT.getSizeInBits()));
759 SDValue alignLoadVec;
760 SDValue basePtr = SN->getBasePtr();
761 SDValue the_chain = SN->getChain();
762 SDValue insertEltOffs;
764 if (alignment == 16) {
767 // Special cases for a known aligned load to simplify the base pointer
768 // and insertion byte:
769 if (basePtr.getOpcode() == ISD::ADD
770 && (CN = dyn_cast<ConstantSDNode>(basePtr.getOperand(1))) != 0) {
771 // Known offset into basePtr
772 int64_t offset = CN->getSExtValue();
774 // Simplify the base pointer for this case:
775 basePtr = basePtr.getOperand(0);
776 insertEltOffs = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
778 DAG.getConstant((offset & 0xf), PtrVT));
780 if ((offset & ~0xf) > 0) {
781 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
783 DAG.getConstant((offset & ~0xf), PtrVT));
786 // Otherwise, assume it's at byte 0 of basePtr
787 insertEltOffs = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
789 DAG.getConstant(0, PtrVT));
792 // Unaligned load: must be more pessimistic about addressing modes:
793 if (basePtr.getOpcode() == ISD::ADD) {
794 MachineFunction &MF = DAG.getMachineFunction();
795 MachineRegisterInfo &RegInfo = MF.getRegInfo();
796 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
799 SDValue Op0 = basePtr.getOperand(0);
800 SDValue Op1 = basePtr.getOperand(1);
802 if (isa<ConstantSDNode>(Op1)) {
803 // Convert the (add <ptr>, <const>) to an indirect address contained
804 // in a register. Note that this is done because we need to avoid
805 // creating a 0(reg) d-form address due to the SPU's block loads.
806 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Op0, Op1);
807 the_chain = DAG.getCopyToReg(the_chain, dl, VReg, basePtr, Flag);
808 basePtr = DAG.getCopyFromReg(the_chain, dl, VReg, PtrVT);
810 // Convert the (add <arg1>, <arg2>) to an indirect address, which
811 // will likely be lowered as a reg(reg) x-form address.
812 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Op0, Op1);
815 basePtr = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
817 DAG.getConstant(0, PtrVT));
820 // Insertion point is solely determined by basePtr's contents
821 insertEltOffs = DAG.getNode(ISD::ADD, dl, PtrVT,
823 DAG.getConstant(0, PtrVT));
826 // Re-emit as a v16i8 vector load
827 alignLoadVec = DAG.getLoad(MVT::v16i8, dl, the_chain, basePtr,
828 SN->getSrcValue(), SN->getSrcValueOffset(),
829 SN->isVolatile(), 16);
832 the_chain = alignLoadVec.getValue(1);
834 LoadSDNode *LN = cast<LoadSDNode>(alignLoadVec);
835 SDValue theValue = SN->getValue();
839 && (theValue.getOpcode() == ISD::AssertZext
840 || theValue.getOpcode() == ISD::AssertSext)) {
841 // Drill down and get the value for zero- and sign-extended
843 theValue = theValue.getOperand(0);
846 // If the base pointer is already a D-form address, then just create
847 // a new D-form address with a slot offset and the orignal base pointer.
848 // Otherwise generate a D-form address with the slot offset relative
849 // to the stack pointer, which is always aligned.
851 if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
852 errs() << "CellSPU LowerSTORE: basePtr = ";
853 basePtr.getNode()->dump(&DAG);
858 SDValue insertEltOp =
859 DAG.getNode(SPUISD::SHUFFLE_MASK, dl, vecVT, insertEltOffs);
860 SDValue vectorizeOp =
861 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, vecVT, theValue);
863 result = DAG.getNode(SPUISD::SHUFB, dl, vecVT,
864 vectorizeOp, alignLoadVec,
865 DAG.getNode(ISD::BIT_CONVERT, dl,
866 MVT::v4i32, insertEltOp));
868 result = DAG.getStore(the_chain, dl, result, basePtr,
869 LN->getSrcValue(), LN->getSrcValueOffset(),
870 LN->isVolatile(), LN->getAlignment());
872 #if 0 && !defined(NDEBUG)
873 if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
874 const SDValue ¤tRoot = DAG.getRoot();
877 errs() << "------- CellSPU:LowerStore result:\n";
879 errs() << "-------\n";
880 DAG.setRoot(currentRoot);
891 case ISD::LAST_INDEXED_MODE:
894 raw_string_ostream Msg(msg);
895 Msg << "LowerLOAD: Got a LoadSDNode with an addr mode other than "
897 Msg << (unsigned) SN->getAddressingMode();
898 llvm_report_error(Msg.str());
906 //! Generate the address of a constant pool entry.
908 LowerConstantPool(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
909 EVT PtrVT = Op.getValueType();
910 ConstantPoolSDNode *CP = cast<ConstantPoolSDNode>(Op);
911 Constant *C = CP->getConstVal();
912 SDValue CPI = DAG.getTargetConstantPool(C, PtrVT, CP->getAlignment());
913 SDValue Zero = DAG.getConstant(0, PtrVT);
914 const TargetMachine &TM = DAG.getTarget();
915 // FIXME there is no actual debug info here
916 DebugLoc dl = Op.getDebugLoc();
918 if (TM.getRelocationModel() == Reloc::Static) {
919 if (!ST->usingLargeMem()) {
920 // Just return the SDValue with the constant pool address in it.
921 return DAG.getNode(SPUISD::AFormAddr, dl, PtrVT, CPI, Zero);
923 SDValue Hi = DAG.getNode(SPUISD::Hi, dl, PtrVT, CPI, Zero);
924 SDValue Lo = DAG.getNode(SPUISD::Lo, dl, PtrVT, CPI, Zero);
925 return DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Hi, Lo);
929 llvm_unreachable("LowerConstantPool: Relocation model other than static"
934 //! Alternate entry point for generating the address of a constant pool entry
936 SPU::LowerConstantPool(SDValue Op, SelectionDAG &DAG, const SPUTargetMachine &TM) {
937 return ::LowerConstantPool(Op, DAG, TM.getSubtargetImpl());
941 LowerJumpTable(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
942 EVT PtrVT = Op.getValueType();
943 JumpTableSDNode *JT = cast<JumpTableSDNode>(Op);
944 SDValue JTI = DAG.getTargetJumpTable(JT->getIndex(), PtrVT);
945 SDValue Zero = DAG.getConstant(0, PtrVT);
946 const TargetMachine &TM = DAG.getTarget();
947 // FIXME there is no actual debug info here
948 DebugLoc dl = Op.getDebugLoc();
950 if (TM.getRelocationModel() == Reloc::Static) {
951 if (!ST->usingLargeMem()) {
952 return DAG.getNode(SPUISD::AFormAddr, dl, PtrVT, JTI, Zero);
954 SDValue Hi = DAG.getNode(SPUISD::Hi, dl, PtrVT, JTI, Zero);
955 SDValue Lo = DAG.getNode(SPUISD::Lo, dl, PtrVT, JTI, Zero);
956 return DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Hi, Lo);
960 llvm_unreachable("LowerJumpTable: Relocation model other than static"
966 LowerGlobalAddress(SDValue Op, SelectionDAG &DAG, const SPUSubtarget *ST) {
967 EVT PtrVT = Op.getValueType();
968 GlobalAddressSDNode *GSDN = cast<GlobalAddressSDNode>(Op);
969 GlobalValue *GV = GSDN->getGlobal();
970 SDValue GA = DAG.getTargetGlobalAddress(GV, PtrVT, GSDN->getOffset());
971 const TargetMachine &TM = DAG.getTarget();
972 SDValue Zero = DAG.getConstant(0, PtrVT);
973 // FIXME there is no actual debug info here
974 DebugLoc dl = Op.getDebugLoc();
976 if (TM.getRelocationModel() == Reloc::Static) {
977 if (!ST->usingLargeMem()) {
978 return DAG.getNode(SPUISD::AFormAddr, dl, PtrVT, GA, Zero);
980 SDValue Hi = DAG.getNode(SPUISD::Hi, dl, PtrVT, GA, Zero);
981 SDValue Lo = DAG.getNode(SPUISD::Lo, dl, PtrVT, GA, Zero);
982 return DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, Hi, Lo);
985 llvm_report_error("LowerGlobalAddress: Relocation model other than static"
993 //! Custom lower double precision floating point constants
995 LowerConstantFP(SDValue Op, SelectionDAG &DAG) {
996 EVT VT = Op.getValueType();
997 // FIXME there is no actual debug info here
998 DebugLoc dl = Op.getDebugLoc();
1000 if (VT == MVT::f64) {
1001 ConstantFPSDNode *FP = cast<ConstantFPSDNode>(Op.getNode());
1004 "LowerConstantFP: Node is not ConstantFPSDNode");
1006 uint64_t dbits = DoubleToBits(FP->getValueAPF().convertToDouble());
1007 SDValue T = DAG.getConstant(dbits, MVT::i64);
1008 SDValue Tvec = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i64, T, T);
1009 return DAG.getNode(SPUISD::VEC2PREFSLOT, dl, VT,
1010 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64, Tvec));
1017 SPUTargetLowering::LowerFormalArguments(SDValue Chain,
1018 unsigned CallConv, bool isVarArg,
1019 const SmallVectorImpl<ISD::InputArg>
1021 DebugLoc dl, SelectionDAG &DAG,
1022 SmallVectorImpl<SDValue> &InVals) {
1024 MachineFunction &MF = DAG.getMachineFunction();
1025 MachineFrameInfo *MFI = MF.getFrameInfo();
1026 MachineRegisterInfo &RegInfo = MF.getRegInfo();
1028 const unsigned *ArgRegs = SPURegisterInfo::getArgRegs();
1029 const unsigned NumArgRegs = SPURegisterInfo::getNumArgRegs();
1031 unsigned ArgOffset = SPUFrameInfo::minStackSize();
1032 unsigned ArgRegIdx = 0;
1033 unsigned StackSlotSize = SPUFrameInfo::stackSlotSize();
1035 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1037 // Add DAG nodes to load the arguments or copy them out of registers.
1038 for (unsigned ArgNo = 0, e = Ins.size(); ArgNo != e; ++ArgNo) {
1039 EVT ObjectVT = Ins[ArgNo].VT;
1040 unsigned ObjSize = ObjectVT.getSizeInBits()/8;
1043 if (ArgRegIdx < NumArgRegs) {
1044 const TargetRegisterClass *ArgRegClass;
1046 switch (ObjectVT.getSimpleVT().SimpleTy) {
1049 raw_string_ostream Msg(msg);
1050 Msg << "LowerFormalArguments Unhandled argument type: "
1051 << ObjectVT.getEVTString();
1052 llvm_report_error(Msg.str());
1055 ArgRegClass = &SPU::R8CRegClass;
1058 ArgRegClass = &SPU::R16CRegClass;
1061 ArgRegClass = &SPU::R32CRegClass;
1064 ArgRegClass = &SPU::R64CRegClass;
1067 ArgRegClass = &SPU::GPRCRegClass;
1070 ArgRegClass = &SPU::R32FPRegClass;
1073 ArgRegClass = &SPU::R64FPRegClass;
1081 ArgRegClass = &SPU::VECREGRegClass;
1085 unsigned VReg = RegInfo.createVirtualRegister(ArgRegClass);
1086 RegInfo.addLiveIn(ArgRegs[ArgRegIdx], VReg);
1087 ArgVal = DAG.getCopyFromReg(Chain, dl, VReg, ObjectVT);
1090 // We need to load the argument to a virtual register if we determined
1091 // above that we ran out of physical registers of the appropriate type
1092 // or we're forced to do vararg
1093 int FI = MFI->CreateFixedObject(ObjSize, ArgOffset);
1094 SDValue FIN = DAG.getFrameIndex(FI, PtrVT);
1095 ArgVal = DAG.getLoad(ObjectVT, dl, Chain, FIN, NULL, 0);
1096 ArgOffset += StackSlotSize;
1099 InVals.push_back(ArgVal);
1101 Chain = ArgVal.getOperand(0);
1106 // unsigned int ptr_size = PtrVT.getSizeInBits() / 8;
1107 // We will spill (79-3)+1 registers to the stack
1108 SmallVector<SDValue, 79-3+1> MemOps;
1110 // Create the frame slot
1112 for (; ArgRegIdx != NumArgRegs; ++ArgRegIdx) {
1113 VarArgsFrameIndex = MFI->CreateFixedObject(StackSlotSize, ArgOffset);
1114 SDValue FIN = DAG.getFrameIndex(VarArgsFrameIndex, PtrVT);
1115 SDValue ArgVal = DAG.getRegister(ArgRegs[ArgRegIdx], MVT::v16i8);
1116 SDValue Store = DAG.getStore(Chain, dl, ArgVal, FIN, NULL, 0);
1117 Chain = Store.getOperand(0);
1118 MemOps.push_back(Store);
1120 // Increment address by stack slot size for the next stored argument
1121 ArgOffset += StackSlotSize;
1123 if (!MemOps.empty())
1124 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1125 &MemOps[0], MemOps.size());
1131 /// isLSAAddress - Return the immediate to use if the specified
1132 /// value is representable as a LSA address.
1133 static SDNode *isLSAAddress(SDValue Op, SelectionDAG &DAG) {
1134 ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op);
1137 int Addr = C->getZExtValue();
1138 if ((Addr & 3) != 0 || // Low 2 bits are implicitly zero.
1139 (Addr << 14 >> 14) != Addr)
1140 return 0; // Top 14 bits have to be sext of immediate.
1142 return DAG.getConstant((int)C->getZExtValue() >> 2, MVT::i32).getNode();
1146 SPUTargetLowering::LowerCall(SDValue Chain, SDValue Callee,
1147 unsigned CallConv, bool isVarArg,
1149 const SmallVectorImpl<ISD::OutputArg> &Outs,
1150 const SmallVectorImpl<ISD::InputArg> &Ins,
1151 DebugLoc dl, SelectionDAG &DAG,
1152 SmallVectorImpl<SDValue> &InVals) {
1154 const SPUSubtarget *ST = SPUTM.getSubtargetImpl();
1155 unsigned NumOps = Outs.size();
1156 unsigned StackSlotSize = SPUFrameInfo::stackSlotSize();
1157 const unsigned *ArgRegs = SPURegisterInfo::getArgRegs();
1158 const unsigned NumArgRegs = SPURegisterInfo::getNumArgRegs();
1160 // Handy pointer type
1161 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1163 // Accumulate how many bytes are to be pushed on the stack, including the
1164 // linkage area, and parameter passing area. According to the SPU ABI,
1165 // we minimally need space for [LR] and [SP]
1166 unsigned NumStackBytes = SPUFrameInfo::minStackSize();
1168 // Set up a copy of the stack pointer for use loading and storing any
1169 // arguments that may not fit in the registers available for argument
1171 SDValue StackPtr = DAG.getRegister(SPU::R1, MVT::i32);
1173 // Figure out which arguments are going to go in registers, and which in
1175 unsigned ArgOffset = SPUFrameInfo::minStackSize(); // Just below [LR]
1176 unsigned ArgRegIdx = 0;
1178 // Keep track of registers passing arguments
1179 std::vector<std::pair<unsigned, SDValue> > RegsToPass;
1180 // And the arguments passed on the stack
1181 SmallVector<SDValue, 8> MemOpChains;
1183 for (unsigned i = 0; i != NumOps; ++i) {
1184 SDValue Arg = Outs[i].Val;
1186 // PtrOff will be used to store the current argument to the stack if a
1187 // register cannot be found for it.
1188 SDValue PtrOff = DAG.getConstant(ArgOffset, StackPtr.getValueType());
1189 PtrOff = DAG.getNode(ISD::ADD, dl, PtrVT, StackPtr, PtrOff);
1191 switch (Arg.getValueType().getSimpleVT().SimpleTy) {
1192 default: llvm_unreachable("Unexpected ValueType for argument!");
1198 if (ArgRegIdx != NumArgRegs) {
1199 RegsToPass.push_back(std::make_pair(ArgRegs[ArgRegIdx++], Arg));
1201 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff, NULL, 0));
1202 ArgOffset += StackSlotSize;
1207 if (ArgRegIdx != NumArgRegs) {
1208 RegsToPass.push_back(std::make_pair(ArgRegs[ArgRegIdx++], Arg));
1210 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff, NULL, 0));
1211 ArgOffset += StackSlotSize;
1220 if (ArgRegIdx != NumArgRegs) {
1221 RegsToPass.push_back(std::make_pair(ArgRegs[ArgRegIdx++], Arg));
1223 MemOpChains.push_back(DAG.getStore(Chain, dl, Arg, PtrOff, NULL, 0));
1224 ArgOffset += StackSlotSize;
1230 // Update number of stack bytes actually used, insert a call sequence start
1231 NumStackBytes = (ArgOffset - SPUFrameInfo::minStackSize());
1232 Chain = DAG.getCALLSEQ_START(Chain, DAG.getIntPtrConstant(NumStackBytes,
1235 if (!MemOpChains.empty()) {
1236 // Adjust the stack pointer for the stack arguments.
1237 Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
1238 &MemOpChains[0], MemOpChains.size());
1241 // Build a sequence of copy-to-reg nodes chained together with token chain
1242 // and flag operands which copy the outgoing args into the appropriate regs.
1244 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i) {
1245 Chain = DAG.getCopyToReg(Chain, dl, RegsToPass[i].first,
1246 RegsToPass[i].second, InFlag);
1247 InFlag = Chain.getValue(1);
1250 SmallVector<SDValue, 8> Ops;
1251 unsigned CallOpc = SPUISD::CALL;
1253 // If the callee is a GlobalAddress/ExternalSymbol node (quite common, every
1254 // direct call is) turn it into a TargetGlobalAddress/TargetExternalSymbol
1255 // node so that legalize doesn't hack it.
1256 if (GlobalAddressSDNode *G = dyn_cast<GlobalAddressSDNode>(Callee)) {
1257 GlobalValue *GV = G->getGlobal();
1258 EVT CalleeVT = Callee.getValueType();
1259 SDValue Zero = DAG.getConstant(0, PtrVT);
1260 SDValue GA = DAG.getTargetGlobalAddress(GV, CalleeVT);
1262 if (!ST->usingLargeMem()) {
1263 // Turn calls to targets that are defined (i.e., have bodies) into BRSL
1264 // style calls, otherwise, external symbols are BRASL calls. This assumes
1265 // that declared/defined symbols are in the same compilation unit and can
1266 // be reached through PC-relative jumps.
1269 // This may be an unsafe assumption for JIT and really large compilation
1271 if (GV->isDeclaration()) {
1272 Callee = DAG.getNode(SPUISD::AFormAddr, dl, CalleeVT, GA, Zero);
1274 Callee = DAG.getNode(SPUISD::PCRelAddr, dl, CalleeVT, GA, Zero);
1277 // "Large memory" mode: Turn all calls into indirect calls with a X-form
1279 Callee = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, GA, Zero);
1281 } else if (ExternalSymbolSDNode *S = dyn_cast<ExternalSymbolSDNode>(Callee)) {
1282 EVT CalleeVT = Callee.getValueType();
1283 SDValue Zero = DAG.getConstant(0, PtrVT);
1284 SDValue ExtSym = DAG.getTargetExternalSymbol(S->getSymbol(),
1285 Callee.getValueType());
1287 if (!ST->usingLargeMem()) {
1288 Callee = DAG.getNode(SPUISD::AFormAddr, dl, CalleeVT, ExtSym, Zero);
1290 Callee = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT, ExtSym, Zero);
1292 } else if (SDNode *Dest = isLSAAddress(Callee, DAG)) {
1293 // If this is an absolute destination address that appears to be a legal
1294 // local store address, use the munged value.
1295 Callee = SDValue(Dest, 0);
1298 Ops.push_back(Chain);
1299 Ops.push_back(Callee);
1301 // Add argument registers to the end of the list so that they are known live
1303 for (unsigned i = 0, e = RegsToPass.size(); i != e; ++i)
1304 Ops.push_back(DAG.getRegister(RegsToPass[i].first,
1305 RegsToPass[i].second.getValueType()));
1307 if (InFlag.getNode())
1308 Ops.push_back(InFlag);
1309 // Returns a chain and a flag for retval copy to use.
1310 Chain = DAG.getNode(CallOpc, dl, DAG.getVTList(MVT::Other, MVT::Flag),
1311 &Ops[0], Ops.size());
1312 InFlag = Chain.getValue(1);
1314 Chain = DAG.getCALLSEQ_END(Chain, DAG.getIntPtrConstant(NumStackBytes, true),
1315 DAG.getIntPtrConstant(0, true), InFlag);
1317 InFlag = Chain.getValue(1);
1319 // If the function returns void, just return the chain.
1323 // If the call has results, copy the values out of the ret val registers.
1324 switch (Ins[0].VT.getSimpleVT().SimpleTy) {
1325 default: llvm_unreachable("Unexpected ret value!");
1326 case MVT::Other: break;
1328 if (Ins.size() > 1 && Ins[1].VT == MVT::i32) {
1329 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R4,
1330 MVT::i32, InFlag).getValue(1);
1331 InVals.push_back(Chain.getValue(0));
1332 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R3, MVT::i32,
1333 Chain.getValue(2)).getValue(1);
1334 InVals.push_back(Chain.getValue(0));
1336 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R3, MVT::i32,
1337 InFlag).getValue(1);
1338 InVals.push_back(Chain.getValue(0));
1342 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R3, MVT::i64,
1343 InFlag).getValue(1);
1344 InVals.push_back(Chain.getValue(0));
1347 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R3, MVT::i128,
1348 InFlag).getValue(1);
1349 InVals.push_back(Chain.getValue(0));
1353 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R3, Ins[0].VT,
1354 InFlag).getValue(1);
1355 InVals.push_back(Chain.getValue(0));
1363 Chain = DAG.getCopyFromReg(Chain, dl, SPU::R3, Ins[0].VT,
1364 InFlag).getValue(1);
1365 InVals.push_back(Chain.getValue(0));
1373 SPUTargetLowering::LowerReturn(SDValue Chain,
1374 unsigned CallConv, bool isVarArg,
1375 const SmallVectorImpl<ISD::OutputArg> &Outs,
1376 DebugLoc dl, SelectionDAG &DAG) {
1378 SmallVector<CCValAssign, 16> RVLocs;
1379 CCState CCInfo(CallConv, isVarArg, getTargetMachine(),
1380 RVLocs, *DAG.getContext());
1381 CCInfo.AnalyzeReturn(Outs, RetCC_SPU);
1383 // If this is the first return lowered for this function, add the regs to the
1384 // liveout set for the function.
1385 if (DAG.getMachineFunction().getRegInfo().liveout_empty()) {
1386 for (unsigned i = 0; i != RVLocs.size(); ++i)
1387 DAG.getMachineFunction().getRegInfo().addLiveOut(RVLocs[i].getLocReg());
1392 // Copy the result values into the output registers.
1393 for (unsigned i = 0; i != RVLocs.size(); ++i) {
1394 CCValAssign &VA = RVLocs[i];
1395 assert(VA.isRegLoc() && "Can only return in registers!");
1396 Chain = DAG.getCopyToReg(Chain, dl, VA.getLocReg(),
1398 Flag = Chain.getValue(1);
1402 return DAG.getNode(SPUISD::RET_FLAG, dl, MVT::Other, Chain, Flag);
1404 return DAG.getNode(SPUISD::RET_FLAG, dl, MVT::Other, Chain);
1408 //===----------------------------------------------------------------------===//
1409 // Vector related lowering:
1410 //===----------------------------------------------------------------------===//
1412 static ConstantSDNode *
1413 getVecImm(SDNode *N) {
1414 SDValue OpVal(0, 0);
1416 // Check to see if this buildvec has a single non-undef value in its elements.
1417 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
1418 if (N->getOperand(i).getOpcode() == ISD::UNDEF) continue;
1419 if (OpVal.getNode() == 0)
1420 OpVal = N->getOperand(i);
1421 else if (OpVal != N->getOperand(i))
1425 if (OpVal.getNode() != 0) {
1426 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(OpVal)) {
1434 /// get_vec_i18imm - Test if this vector is a vector filled with the same value
1435 /// and the value fits into an unsigned 18-bit constant, and if so, return the
1437 SDValue SPU::get_vec_u18imm(SDNode *N, SelectionDAG &DAG,
1439 if (ConstantSDNode *CN = getVecImm(N)) {
1440 uint64_t Value = CN->getZExtValue();
1441 if (ValueType == MVT::i64) {
1442 uint64_t UValue = CN->getZExtValue();
1443 uint32_t upper = uint32_t(UValue >> 32);
1444 uint32_t lower = uint32_t(UValue);
1447 Value = Value >> 32;
1449 if (Value <= 0x3ffff)
1450 return DAG.getTargetConstant(Value, ValueType);
1456 /// get_vec_i16imm - Test if this vector is a vector filled with the same value
1457 /// and the value fits into a signed 16-bit constant, and if so, return the
1459 SDValue SPU::get_vec_i16imm(SDNode *N, SelectionDAG &DAG,
1461 if (ConstantSDNode *CN = getVecImm(N)) {
1462 int64_t Value = CN->getSExtValue();
1463 if (ValueType == MVT::i64) {
1464 uint64_t UValue = CN->getZExtValue();
1465 uint32_t upper = uint32_t(UValue >> 32);
1466 uint32_t lower = uint32_t(UValue);
1469 Value = Value >> 32;
1471 if (Value >= -(1 << 15) && Value <= ((1 << 15) - 1)) {
1472 return DAG.getTargetConstant(Value, ValueType);
1479 /// get_vec_i10imm - Test if this vector is a vector filled with the same value
1480 /// and the value fits into a signed 10-bit constant, and if so, return the
1482 SDValue SPU::get_vec_i10imm(SDNode *N, SelectionDAG &DAG,
1484 if (ConstantSDNode *CN = getVecImm(N)) {
1485 int64_t Value = CN->getSExtValue();
1486 if (ValueType == MVT::i64) {
1487 uint64_t UValue = CN->getZExtValue();
1488 uint32_t upper = uint32_t(UValue >> 32);
1489 uint32_t lower = uint32_t(UValue);
1492 Value = Value >> 32;
1494 if (isS10Constant(Value))
1495 return DAG.getTargetConstant(Value, ValueType);
1501 /// get_vec_i8imm - Test if this vector is a vector filled with the same value
1502 /// and the value fits into a signed 8-bit constant, and if so, return the
1505 /// @note: The incoming vector is v16i8 because that's the only way we can load
1506 /// constant vectors. Thus, we test to see if the upper and lower bytes are the
1508 SDValue SPU::get_vec_i8imm(SDNode *N, SelectionDAG &DAG,
1510 if (ConstantSDNode *CN = getVecImm(N)) {
1511 int Value = (int) CN->getZExtValue();
1512 if (ValueType == MVT::i16
1513 && Value <= 0xffff /* truncated from uint64_t */
1514 && ((short) Value >> 8) == ((short) Value & 0xff))
1515 return DAG.getTargetConstant(Value & 0xff, ValueType);
1516 else if (ValueType == MVT::i8
1517 && (Value & 0xff) == Value)
1518 return DAG.getTargetConstant(Value, ValueType);
1524 /// get_ILHUvec_imm - Test if this vector is a vector filled with the same value
1525 /// and the value fits into a signed 16-bit constant, and if so, return the
1527 SDValue SPU::get_ILHUvec_imm(SDNode *N, SelectionDAG &DAG,
1529 if (ConstantSDNode *CN = getVecImm(N)) {
1530 uint64_t Value = CN->getZExtValue();
1531 if ((ValueType == MVT::i32
1532 && ((unsigned) Value & 0xffff0000) == (unsigned) Value)
1533 || (ValueType == MVT::i64 && (Value & 0xffff0000) == Value))
1534 return DAG.getTargetConstant(Value >> 16, ValueType);
1540 /// get_v4i32_imm - Catch-all for general 32-bit constant vectors
1541 SDValue SPU::get_v4i32_imm(SDNode *N, SelectionDAG &DAG) {
1542 if (ConstantSDNode *CN = getVecImm(N)) {
1543 return DAG.getTargetConstant((unsigned) CN->getZExtValue(), MVT::i32);
1549 /// get_v4i32_imm - Catch-all for general 64-bit constant vectors
1550 SDValue SPU::get_v2i64_imm(SDNode *N, SelectionDAG &DAG) {
1551 if (ConstantSDNode *CN = getVecImm(N)) {
1552 return DAG.getTargetConstant((unsigned) CN->getZExtValue(), MVT::i64);
1558 //! Lower a BUILD_VECTOR instruction creatively:
1560 LowerBUILD_VECTOR(SDValue Op, SelectionDAG &DAG) {
1561 EVT VT = Op.getValueType();
1562 EVT EltVT = VT.getVectorElementType();
1563 DebugLoc dl = Op.getDebugLoc();
1564 BuildVectorSDNode *BCN = dyn_cast<BuildVectorSDNode>(Op.getNode());
1565 assert(BCN != 0 && "Expected BuildVectorSDNode in SPU LowerBUILD_VECTOR");
1566 unsigned minSplatBits = EltVT.getSizeInBits();
1568 if (minSplatBits < 16)
1571 APInt APSplatBits, APSplatUndef;
1572 unsigned SplatBitSize;
1575 if (!BCN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
1576 HasAnyUndefs, minSplatBits)
1577 || minSplatBits < SplatBitSize)
1578 return SDValue(); // Wasn't a constant vector or splat exceeded min
1580 uint64_t SplatBits = APSplatBits.getZExtValue();
1582 switch (VT.getSimpleVT().SimpleTy) {
1585 raw_string_ostream Msg(msg);
1586 Msg << "CellSPU: Unhandled VT in LowerBUILD_VECTOR, VT = "
1587 << VT.getEVTString();
1588 llvm_report_error(Msg.str());
1592 uint32_t Value32 = uint32_t(SplatBits);
1593 assert(SplatBitSize == 32
1594 && "LowerBUILD_VECTOR: Unexpected floating point vector element.");
1595 // NOTE: pretend the constant is an integer. LLVM won't load FP constants
1596 SDValue T = DAG.getConstant(Value32, MVT::i32);
1597 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4f32,
1598 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32, T,T,T,T));
1602 uint64_t f64val = uint64_t(SplatBits);
1603 assert(SplatBitSize == 64
1604 && "LowerBUILD_VECTOR: 64-bit float vector size > 8 bytes.");
1605 // NOTE: pretend the constant is an integer. LLVM won't load FP constants
1606 SDValue T = DAG.getConstant(f64val, MVT::i64);
1607 return DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v2f64,
1608 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i64, T, T));
1612 // 8-bit constants have to be expanded to 16-bits
1613 unsigned short Value16 = SplatBits /* | (SplatBits << 8) */;
1614 SmallVector<SDValue, 8> Ops;
1616 Ops.assign(8, DAG.getConstant(Value16, MVT::i16));
1617 return DAG.getNode(ISD::BIT_CONVERT, dl, VT,
1618 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v8i16, &Ops[0], Ops.size()));
1621 unsigned short Value16 = SplatBits;
1622 SDValue T = DAG.getConstant(Value16, EltVT);
1623 SmallVector<SDValue, 8> Ops;
1626 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &Ops[0], Ops.size());
1629 SDValue T = DAG.getConstant(unsigned(SplatBits), VT.getVectorElementType());
1630 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, T, T, T, T);
1633 SDValue T = DAG.getConstant(unsigned(SplatBits), VT.getVectorElementType());
1634 return DAG.getNode(ISD::BUILD_VECTOR, dl, VT, T, T);
1637 return SPU::LowerV2I64Splat(VT, DAG, SplatBits, dl);
1647 SPU::LowerV2I64Splat(EVT OpVT, SelectionDAG& DAG, uint64_t SplatVal,
1649 uint32_t upper = uint32_t(SplatVal >> 32);
1650 uint32_t lower = uint32_t(SplatVal);
1652 if (upper == lower) {
1653 // Magic constant that can be matched by IL, ILA, et. al.
1654 SDValue Val = DAG.getTargetConstant(upper, MVT::i32);
1655 return DAG.getNode(ISD::BIT_CONVERT, dl, OpVT,
1656 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
1657 Val, Val, Val, Val));
1659 bool upper_special, lower_special;
1661 // NOTE: This code creates common-case shuffle masks that can be easily
1662 // detected as common expressions. It is not attempting to create highly
1663 // specialized masks to replace any and all 0's, 0xff's and 0x80's.
1665 // Detect if the upper or lower half is a special shuffle mask pattern:
1666 upper_special = (upper == 0 || upper == 0xffffffff || upper == 0x80000000);
1667 lower_special = (lower == 0 || lower == 0xffffffff || lower == 0x80000000);
1669 // Both upper and lower are special, lower to a constant pool load:
1670 if (lower_special && upper_special) {
1671 SDValue SplatValCN = DAG.getConstant(SplatVal, MVT::i64);
1672 return DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v2i64,
1673 SplatValCN, SplatValCN);
1678 SmallVector<SDValue, 16> ShufBytes;
1681 // Create lower vector if not a special pattern
1682 if (!lower_special) {
1683 SDValue LO32C = DAG.getConstant(lower, MVT::i32);
1684 LO32 = DAG.getNode(ISD::BIT_CONVERT, dl, OpVT,
1685 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
1686 LO32C, LO32C, LO32C, LO32C));
1689 // Create upper vector if not a special pattern
1690 if (!upper_special) {
1691 SDValue HI32C = DAG.getConstant(upper, MVT::i32);
1692 HI32 = DAG.getNode(ISD::BIT_CONVERT, dl, OpVT,
1693 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
1694 HI32C, HI32C, HI32C, HI32C));
1697 // If either upper or lower are special, then the two input operands are
1698 // the same (basically, one of them is a "don't care")
1704 for (int i = 0; i < 4; ++i) {
1706 for (int j = 0; j < 4; ++j) {
1708 bool process_upper, process_lower;
1710 process_upper = (upper_special && (i & 1) == 0);
1711 process_lower = (lower_special && (i & 1) == 1);
1713 if (process_upper || process_lower) {
1714 if ((process_upper && upper == 0)
1715 || (process_lower && lower == 0))
1717 else if ((process_upper && upper == 0xffffffff)
1718 || (process_lower && lower == 0xffffffff))
1720 else if ((process_upper && upper == 0x80000000)
1721 || (process_lower && lower == 0x80000000))
1722 val |= (j == 0 ? 0xe0 : 0x80);
1724 val |= i * 4 + j + ((i & 1) * 16);
1727 ShufBytes.push_back(DAG.getConstant(val, MVT::i32));
1730 return DAG.getNode(SPUISD::SHUFB, dl, OpVT, HI32, LO32,
1731 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
1732 &ShufBytes[0], ShufBytes.size()));
1736 /// LowerVECTOR_SHUFFLE - Lower a vector shuffle (V1, V2, V3) to something on
1737 /// which the Cell can operate. The code inspects V3 to ascertain whether the
1738 /// permutation vector, V3, is monotonically increasing with one "exception"
1739 /// element, e.g., (0, 1, _, 3). If this is the case, then generate a
1740 /// SHUFFLE_MASK synthetic instruction. Otherwise, spill V3 to the constant pool.
1741 /// In either case, the net result is going to eventually invoke SHUFB to
1742 /// permute/shuffle the bytes from V1 and V2.
1744 /// SHUFFLE_MASK is eventually selected as one of the C*D instructions, generate
1745 /// control word for byte/halfword/word insertion. This takes care of a single
1746 /// element move from V2 into V1.
1748 /// SPUISD::SHUFB is eventually selected as Cell's <i>shufb</i> instructions.
1749 static SDValue LowerVECTOR_SHUFFLE(SDValue Op, SelectionDAG &DAG) {
1750 const ShuffleVectorSDNode *SVN = cast<ShuffleVectorSDNode>(Op);
1751 SDValue V1 = Op.getOperand(0);
1752 SDValue V2 = Op.getOperand(1);
1753 DebugLoc dl = Op.getDebugLoc();
1755 if (V2.getOpcode() == ISD::UNDEF) V2 = V1;
1757 // If we have a single element being moved from V1 to V2, this can be handled
1758 // using the C*[DX] compute mask instructions, but the vector elements have
1759 // to be monotonically increasing with one exception element.
1760 EVT VecVT = V1.getValueType();
1761 EVT EltVT = VecVT.getVectorElementType();
1762 unsigned EltsFromV2 = 0;
1764 unsigned V2EltIdx0 = 0;
1765 unsigned CurrElt = 0;
1766 unsigned MaxElts = VecVT.getVectorNumElements();
1767 unsigned PrevElt = 0;
1769 bool monotonic = true;
1772 if (EltVT == MVT::i8) {
1774 } else if (EltVT == MVT::i16) {
1776 } else if (EltVT == MVT::i32 || EltVT == MVT::f32) {
1778 } else if (EltVT == MVT::i64 || EltVT == MVT::f64) {
1781 llvm_unreachable("Unhandled vector type in LowerVECTOR_SHUFFLE");
1783 for (unsigned i = 0; i != MaxElts; ++i) {
1784 if (SVN->getMaskElt(i) < 0)
1787 unsigned SrcElt = SVN->getMaskElt(i);
1790 if (SrcElt >= V2EltIdx0) {
1791 if (1 >= (++EltsFromV2)) {
1792 V2Elt = (V2EltIdx0 - SrcElt) << 2;
1794 } else if (CurrElt != SrcElt) {
1802 if (PrevElt > 0 && SrcElt < MaxElts) {
1803 if ((PrevElt == SrcElt - 1)
1804 || (PrevElt == MaxElts - 1 && SrcElt == 0)) {
1811 } else if (PrevElt == 0) {
1812 // First time through, need to keep track of previous element
1815 // This isn't a rotation, takes elements from vector 2
1821 if (EltsFromV2 == 1 && monotonic) {
1822 // Compute mask and shuffle
1823 MachineFunction &MF = DAG.getMachineFunction();
1824 MachineRegisterInfo &RegInfo = MF.getRegInfo();
1825 unsigned VReg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
1826 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
1827 // Initialize temporary register to 0
1828 SDValue InitTempReg =
1829 DAG.getCopyToReg(DAG.getEntryNode(), dl, VReg, DAG.getConstant(0, PtrVT));
1830 // Copy register's contents as index in SHUFFLE_MASK:
1831 SDValue ShufMaskOp =
1832 DAG.getNode(SPUISD::SHUFFLE_MASK, dl, MVT::v4i32,
1833 DAG.getTargetConstant(V2Elt, MVT::i32),
1834 DAG.getCopyFromReg(InitTempReg, dl, VReg, PtrVT));
1835 // Use shuffle mask in SHUFB synthetic instruction:
1836 return DAG.getNode(SPUISD::SHUFB, dl, V1.getValueType(), V2, V1,
1838 } else if (rotate) {
1839 int rotamt = (MaxElts - V0Elt) * EltVT.getSizeInBits()/8;
1841 return DAG.getNode(SPUISD::ROTBYTES_LEFT, dl, V1.getValueType(),
1842 V1, DAG.getConstant(rotamt, MVT::i16));
1844 // Convert the SHUFFLE_VECTOR mask's input element units to the
1846 unsigned BytesPerElement = EltVT.getSizeInBits()/8;
1848 SmallVector<SDValue, 16> ResultMask;
1849 for (unsigned i = 0, e = MaxElts; i != e; ++i) {
1850 unsigned SrcElt = SVN->getMaskElt(i) < 0 ? 0 : SVN->getMaskElt(i);
1852 for (unsigned j = 0; j < BytesPerElement; ++j)
1853 ResultMask.push_back(DAG.getConstant(SrcElt*BytesPerElement+j,MVT::i8));
1856 SDValue VPermMask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v16i8,
1857 &ResultMask[0], ResultMask.size());
1858 return DAG.getNode(SPUISD::SHUFB, dl, V1.getValueType(), V1, V2, VPermMask);
1862 static SDValue LowerSCALAR_TO_VECTOR(SDValue Op, SelectionDAG &DAG) {
1863 SDValue Op0 = Op.getOperand(0); // Op0 = the scalar
1864 DebugLoc dl = Op.getDebugLoc();
1866 if (Op0.getNode()->getOpcode() == ISD::Constant) {
1867 // For a constant, build the appropriate constant vector, which will
1868 // eventually simplify to a vector register load.
1870 ConstantSDNode *CN = cast<ConstantSDNode>(Op0.getNode());
1871 SmallVector<SDValue, 16> ConstVecValues;
1875 // Create a constant vector:
1876 switch (Op.getValueType().getSimpleVT().SimpleTy) {
1877 default: llvm_unreachable("Unexpected constant value type in "
1878 "LowerSCALAR_TO_VECTOR");
1879 case MVT::v16i8: n_copies = 16; VT = MVT::i8; break;
1880 case MVT::v8i16: n_copies = 8; VT = MVT::i16; break;
1881 case MVT::v4i32: n_copies = 4; VT = MVT::i32; break;
1882 case MVT::v4f32: n_copies = 4; VT = MVT::f32; break;
1883 case MVT::v2i64: n_copies = 2; VT = MVT::i64; break;
1884 case MVT::v2f64: n_copies = 2; VT = MVT::f64; break;
1887 SDValue CValue = DAG.getConstant(CN->getZExtValue(), VT);
1888 for (size_t j = 0; j < n_copies; ++j)
1889 ConstVecValues.push_back(CValue);
1891 return DAG.getNode(ISD::BUILD_VECTOR, dl, Op.getValueType(),
1892 &ConstVecValues[0], ConstVecValues.size());
1894 // Otherwise, copy the value from one register to another:
1895 switch (Op0.getValueType().getSimpleVT().SimpleTy) {
1896 default: llvm_unreachable("Unexpected value type in LowerSCALAR_TO_VECTOR");
1903 return DAG.getNode(SPUISD::PREFSLOT2VEC, dl, Op.getValueType(), Op0, Op0);
1910 static SDValue LowerEXTRACT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
1911 EVT VT = Op.getValueType();
1912 SDValue N = Op.getOperand(0);
1913 SDValue Elt = Op.getOperand(1);
1914 DebugLoc dl = Op.getDebugLoc();
1917 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Elt)) {
1918 // Constant argument:
1919 int EltNo = (int) C->getZExtValue();
1922 if (VT == MVT::i8 && EltNo >= 16)
1923 llvm_unreachable("SPU LowerEXTRACT_VECTOR_ELT: i8 extraction slot > 15");
1924 else if (VT == MVT::i16 && EltNo >= 8)
1925 llvm_unreachable("SPU LowerEXTRACT_VECTOR_ELT: i16 extraction slot > 7");
1926 else if (VT == MVT::i32 && EltNo >= 4)
1927 llvm_unreachable("SPU LowerEXTRACT_VECTOR_ELT: i32 extraction slot > 4");
1928 else if (VT == MVT::i64 && EltNo >= 2)
1929 llvm_unreachable("SPU LowerEXTRACT_VECTOR_ELT: i64 extraction slot > 2");
1931 if (EltNo == 0 && (VT == MVT::i32 || VT == MVT::i64)) {
1932 // i32 and i64: Element 0 is the preferred slot
1933 return DAG.getNode(SPUISD::VEC2PREFSLOT, dl, VT, N);
1936 // Need to generate shuffle mask and extract:
1937 int prefslot_begin = -1, prefslot_end = -1;
1938 int elt_byte = EltNo * VT.getSizeInBits() / 8;
1940 switch (VT.getSimpleVT().SimpleTy) {
1942 assert(false && "Invalid value type!");
1944 prefslot_begin = prefslot_end = 3;
1948 prefslot_begin = 2; prefslot_end = 3;
1953 prefslot_begin = 0; prefslot_end = 3;
1958 prefslot_begin = 0; prefslot_end = 7;
1963 assert(prefslot_begin != -1 && prefslot_end != -1 &&
1964 "LowerEXTRACT_VECTOR_ELT: preferred slots uninitialized");
1966 unsigned int ShufBytes[16];
1967 for (int i = 0; i < 16; ++i) {
1968 // zero fill uppper part of preferred slot, don't care about the
1970 unsigned int mask_val;
1971 if (i <= prefslot_end) {
1973 ((i < prefslot_begin)
1975 : elt_byte + (i - prefslot_begin));
1977 ShufBytes[i] = mask_val;
1979 ShufBytes[i] = ShufBytes[i % (prefslot_end + 1)];
1982 SDValue ShufMask[4];
1983 for (unsigned i = 0; i < sizeof(ShufMask)/sizeof(ShufMask[0]); ++i) {
1984 unsigned bidx = i * 4;
1985 unsigned int bits = ((ShufBytes[bidx] << 24) |
1986 (ShufBytes[bidx+1] << 16) |
1987 (ShufBytes[bidx+2] << 8) |
1989 ShufMask[i] = DAG.getConstant(bits, MVT::i32);
1992 SDValue ShufMaskVec =
1993 DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
1994 &ShufMask[0], sizeof(ShufMask)/sizeof(ShufMask[0]));
1996 retval = DAG.getNode(SPUISD::VEC2PREFSLOT, dl, VT,
1997 DAG.getNode(SPUISD::SHUFB, dl, N.getValueType(),
1998 N, N, ShufMaskVec));
2000 // Variable index: Rotate the requested element into slot 0, then replicate
2001 // slot 0 across the vector
2002 EVT VecVT = N.getValueType();
2003 if (!VecVT.isSimple() || !VecVT.isVector() || !VecVT.is128BitVector()) {
2004 llvm_report_error("LowerEXTRACT_VECTOR_ELT: Must have a simple, 128-bit"
2008 // Make life easier by making sure the index is zero-extended to i32
2009 if (Elt.getValueType() != MVT::i32)
2010 Elt = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i32, Elt);
2012 // Scale the index to a bit/byte shift quantity
2014 APInt(32, uint64_t(16 / N.getValueType().getVectorNumElements()), false);
2015 unsigned scaleShift = scaleFactor.logBase2();
2018 if (scaleShift > 0) {
2019 // Scale the shift factor:
2020 Elt = DAG.getNode(ISD::SHL, dl, MVT::i32, Elt,
2021 DAG.getConstant(scaleShift, MVT::i32));
2024 vecShift = DAG.getNode(SPUISD::SHLQUAD_L_BYTES, dl, VecVT, N, Elt);
2026 // Replicate the bytes starting at byte 0 across the entire vector (for
2027 // consistency with the notion of a unified register set)
2030 switch (VT.getSimpleVT().SimpleTy) {
2032 llvm_report_error("LowerEXTRACT_VECTOR_ELT(varable): Unhandled vector"
2036 SDValue factor = DAG.getConstant(0x00000000, MVT::i32);
2037 replicate = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
2038 factor, factor, factor, factor);
2042 SDValue factor = DAG.getConstant(0x00010001, MVT::i32);
2043 replicate = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
2044 factor, factor, factor, factor);
2049 SDValue factor = DAG.getConstant(0x00010203, MVT::i32);
2050 replicate = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
2051 factor, factor, factor, factor);
2056 SDValue loFactor = DAG.getConstant(0x00010203, MVT::i32);
2057 SDValue hiFactor = DAG.getConstant(0x04050607, MVT::i32);
2058 replicate = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
2059 loFactor, hiFactor, loFactor, hiFactor);
2064 retval = DAG.getNode(SPUISD::VEC2PREFSLOT, dl, VT,
2065 DAG.getNode(SPUISD::SHUFB, dl, VecVT,
2066 vecShift, vecShift, replicate));
2072 static SDValue LowerINSERT_VECTOR_ELT(SDValue Op, SelectionDAG &DAG) {
2073 SDValue VecOp = Op.getOperand(0);
2074 SDValue ValOp = Op.getOperand(1);
2075 SDValue IdxOp = Op.getOperand(2);
2076 DebugLoc dl = Op.getDebugLoc();
2077 EVT VT = Op.getValueType();
2079 ConstantSDNode *CN = cast<ConstantSDNode>(IdxOp);
2080 assert(CN != 0 && "LowerINSERT_VECTOR_ELT: Index is not constant!");
2082 EVT PtrVT = DAG.getTargetLoweringInfo().getPointerTy();
2083 // Use $sp ($1) because it's always 16-byte aligned and it's available:
2084 SDValue Pointer = DAG.getNode(SPUISD::IndirectAddr, dl, PtrVT,
2085 DAG.getRegister(SPU::R1, PtrVT),
2086 DAG.getConstant(CN->getSExtValue(), PtrVT));
2087 SDValue ShufMask = DAG.getNode(SPUISD::SHUFFLE_MASK, dl, VT, Pointer);
2090 DAG.getNode(SPUISD::SHUFB, dl, VT,
2091 DAG.getNode(ISD::SCALAR_TO_VECTOR, dl, VT, ValOp),
2093 DAG.getNode(ISD::BIT_CONVERT, dl, MVT::v4i32, ShufMask));
2098 static SDValue LowerI8Math(SDValue Op, SelectionDAG &DAG, unsigned Opc,
2099 const TargetLowering &TLI)
2101 SDValue N0 = Op.getOperand(0); // Everything has at least one operand
2102 DebugLoc dl = Op.getDebugLoc();
2103 EVT ShiftVT = TLI.getShiftAmountTy();
2105 assert(Op.getValueType() == MVT::i8);
2108 llvm_unreachable("Unhandled i8 math operator");
2112 // 8-bit addition: Promote the arguments up to 16-bits and truncate
2114 SDValue N1 = Op.getOperand(1);
2115 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N0);
2116 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N1);
2117 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8,
2118 DAG.getNode(Opc, dl, MVT::i16, N0, N1));
2123 // 8-bit subtraction: Promote the arguments up to 16-bits and truncate
2125 SDValue N1 = Op.getOperand(1);
2126 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N0);
2127 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N1);
2128 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8,
2129 DAG.getNode(Opc, dl, MVT::i16, N0, N1));
2133 SDValue N1 = Op.getOperand(1);
2134 EVT N1VT = N1.getValueType();
2136 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, N0);
2137 if (!N1VT.bitsEq(ShiftVT)) {
2138 unsigned N1Opc = N1.getValueType().bitsLT(ShiftVT)
2141 N1 = DAG.getNode(N1Opc, dl, ShiftVT, N1);
2144 // Replicate lower 8-bits into upper 8:
2146 DAG.getNode(ISD::OR, dl, MVT::i16, N0,
2147 DAG.getNode(ISD::SHL, dl, MVT::i16,
2148 N0, DAG.getConstant(8, MVT::i32)));
2150 // Truncate back down to i8
2151 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8,
2152 DAG.getNode(Opc, dl, MVT::i16, ExpandArg, N1));
2156 SDValue N1 = Op.getOperand(1);
2157 EVT N1VT = N1.getValueType();
2159 N0 = DAG.getNode(ISD::ZERO_EXTEND, dl, MVT::i16, N0);
2160 if (!N1VT.bitsEq(ShiftVT)) {
2161 unsigned N1Opc = ISD::ZERO_EXTEND;
2163 if (N1.getValueType().bitsGT(ShiftVT))
2164 N1Opc = ISD::TRUNCATE;
2166 N1 = DAG.getNode(N1Opc, dl, ShiftVT, N1);
2169 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8,
2170 DAG.getNode(Opc, dl, MVT::i16, N0, N1));
2173 SDValue N1 = Op.getOperand(1);
2174 EVT N1VT = N1.getValueType();
2176 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N0);
2177 if (!N1VT.bitsEq(ShiftVT)) {
2178 unsigned N1Opc = ISD::SIGN_EXTEND;
2180 if (N1VT.bitsGT(ShiftVT))
2181 N1Opc = ISD::TRUNCATE;
2182 N1 = DAG.getNode(N1Opc, dl, ShiftVT, N1);
2185 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8,
2186 DAG.getNode(Opc, dl, MVT::i16, N0, N1));
2189 SDValue N1 = Op.getOperand(1);
2191 N0 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N0);
2192 N1 = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i16, N1);
2193 return DAG.getNode(ISD::TRUNCATE, dl, MVT::i8,
2194 DAG.getNode(Opc, dl, MVT::i16, N0, N1));
2202 //! Lower byte immediate operations for v16i8 vectors:
2204 LowerByteImmed(SDValue Op, SelectionDAG &DAG) {
2207 EVT VT = Op.getValueType();
2208 DebugLoc dl = Op.getDebugLoc();
2210 ConstVec = Op.getOperand(0);
2211 Arg = Op.getOperand(1);
2212 if (ConstVec.getNode()->getOpcode() != ISD::BUILD_VECTOR) {
2213 if (ConstVec.getNode()->getOpcode() == ISD::BIT_CONVERT) {
2214 ConstVec = ConstVec.getOperand(0);
2216 ConstVec = Op.getOperand(1);
2217 Arg = Op.getOperand(0);
2218 if (ConstVec.getNode()->getOpcode() == ISD::BIT_CONVERT) {
2219 ConstVec = ConstVec.getOperand(0);
2224 if (ConstVec.getNode()->getOpcode() == ISD::BUILD_VECTOR) {
2225 BuildVectorSDNode *BCN = dyn_cast<BuildVectorSDNode>(ConstVec.getNode());
2226 assert(BCN != 0 && "Expected BuildVectorSDNode in SPU LowerByteImmed");
2228 APInt APSplatBits, APSplatUndef;
2229 unsigned SplatBitSize;
2231 unsigned minSplatBits = VT.getVectorElementType().getSizeInBits();
2233 if (BCN->isConstantSplat(APSplatBits, APSplatUndef, SplatBitSize,
2234 HasAnyUndefs, minSplatBits)
2235 && minSplatBits <= SplatBitSize) {
2236 uint64_t SplatBits = APSplatBits.getZExtValue();
2237 SDValue tc = DAG.getTargetConstant(SplatBits & 0xff, MVT::i8);
2239 SmallVector<SDValue, 16> tcVec;
2240 tcVec.assign(16, tc);
2241 return DAG.getNode(Op.getNode()->getOpcode(), dl, VT, Arg,
2242 DAG.getNode(ISD::BUILD_VECTOR, dl, VT, &tcVec[0], tcVec.size()));
2246 // These operations (AND, OR, XOR) are legal, they just couldn't be custom
2247 // lowered. Return the operation, rather than a null SDValue.
2251 //! Custom lowering for CTPOP (count population)
2253 Custom lowering code that counts the number ones in the input
2254 operand. SPU has such an instruction, but it counts the number of
2255 ones per byte, which then have to be accumulated.
2257 static SDValue LowerCTPOP(SDValue Op, SelectionDAG &DAG) {
2258 EVT VT = Op.getValueType();
2259 EVT vecVT = EVT::getVectorVT(*DAG.getContext(),
2260 VT, (128 / VT.getSizeInBits()));
2261 DebugLoc dl = Op.getDebugLoc();
2263 switch (VT.getSimpleVT().SimpleTy) {
2265 assert(false && "Invalid value type!");
2267 SDValue N = Op.getOperand(0);
2268 SDValue Elt0 = DAG.getConstant(0, MVT::i32);
2270 SDValue Promote = DAG.getNode(SPUISD::PREFSLOT2VEC, dl, vecVT, N, N);
2271 SDValue CNTB = DAG.getNode(SPUISD::CNTB, dl, vecVT, Promote);
2273 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i8, CNTB, Elt0);
2277 MachineFunction &MF = DAG.getMachineFunction();
2278 MachineRegisterInfo &RegInfo = MF.getRegInfo();
2280 unsigned CNTB_reg = RegInfo.createVirtualRegister(&SPU::R16CRegClass);
2282 SDValue N = Op.getOperand(0);
2283 SDValue Elt0 = DAG.getConstant(0, MVT::i16);
2284 SDValue Mask0 = DAG.getConstant(0x0f, MVT::i16);
2285 SDValue Shift1 = DAG.getConstant(8, MVT::i32);
2287 SDValue Promote = DAG.getNode(SPUISD::PREFSLOT2VEC, dl, vecVT, N, N);
2288 SDValue CNTB = DAG.getNode(SPUISD::CNTB, dl, vecVT, Promote);
2290 // CNTB_result becomes the chain to which all of the virtual registers
2291 // CNTB_reg, SUM1_reg become associated:
2292 SDValue CNTB_result =
2293 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i16, CNTB, Elt0);
2295 SDValue CNTB_rescopy =
2296 DAG.getCopyToReg(CNTB_result, dl, CNTB_reg, CNTB_result);
2298 SDValue Tmp1 = DAG.getCopyFromReg(CNTB_rescopy, dl, CNTB_reg, MVT::i16);
2300 return DAG.getNode(ISD::AND, dl, MVT::i16,
2301 DAG.getNode(ISD::ADD, dl, MVT::i16,
2302 DAG.getNode(ISD::SRL, dl, MVT::i16,
2309 MachineFunction &MF = DAG.getMachineFunction();
2310 MachineRegisterInfo &RegInfo = MF.getRegInfo();
2312 unsigned CNTB_reg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
2313 unsigned SUM1_reg = RegInfo.createVirtualRegister(&SPU::R32CRegClass);
2315 SDValue N = Op.getOperand(0);
2316 SDValue Elt0 = DAG.getConstant(0, MVT::i32);
2317 SDValue Mask0 = DAG.getConstant(0xff, MVT::i32);
2318 SDValue Shift1 = DAG.getConstant(16, MVT::i32);
2319 SDValue Shift2 = DAG.getConstant(8, MVT::i32);
2321 SDValue Promote = DAG.getNode(SPUISD::PREFSLOT2VEC, dl, vecVT, N, N);
2322 SDValue CNTB = DAG.getNode(SPUISD::CNTB, dl, vecVT, Promote);
2324 // CNTB_result becomes the chain to which all of the virtual registers
2325 // CNTB_reg, SUM1_reg become associated:
2326 SDValue CNTB_result =
2327 DAG.getNode(ISD::EXTRACT_VECTOR_ELT, dl, MVT::i32, CNTB, Elt0);
2329 SDValue CNTB_rescopy =
2330 DAG.getCopyToReg(CNTB_result, dl, CNTB_reg, CNTB_result);
2333 DAG.getNode(ISD::SRL, dl, MVT::i32,
2334 DAG.getCopyFromReg(CNTB_rescopy, dl, CNTB_reg, MVT::i32),
2338 DAG.getNode(ISD::ADD, dl, MVT::i32, Comp1,
2339 DAG.getCopyFromReg(CNTB_rescopy, dl, CNTB_reg, MVT::i32));
2341 SDValue Sum1_rescopy =
2342 DAG.getCopyToReg(CNTB_result, dl, SUM1_reg, Sum1);
2345 DAG.getNode(ISD::SRL, dl, MVT::i32,
2346 DAG.getCopyFromReg(Sum1_rescopy, dl, SUM1_reg, MVT::i32),
2349 DAG.getNode(ISD::ADD, dl, MVT::i32, Comp2,
2350 DAG.getCopyFromReg(Sum1_rescopy, dl, SUM1_reg, MVT::i32));
2352 return DAG.getNode(ISD::AND, dl, MVT::i32, Sum2, Mask0);
2362 //! Lower ISD::FP_TO_SINT, ISD::FP_TO_UINT for i32
2364 f32->i32 passes through unchanged, whereas f64->i32 expands to a libcall.
2365 All conversions to i64 are expanded to a libcall.
2367 static SDValue LowerFP_TO_INT(SDValue Op, SelectionDAG &DAG,
2368 SPUTargetLowering &TLI) {
2369 EVT OpVT = Op.getValueType();
2370 SDValue Op0 = Op.getOperand(0);
2371 EVT Op0VT = Op0.getValueType();
2373 if ((OpVT == MVT::i32 && Op0VT == MVT::f64)
2374 || OpVT == MVT::i64) {
2375 // Convert f32 / f64 to i32 / i64 via libcall.
2377 (Op.getOpcode() == ISD::FP_TO_SINT)
2378 ? RTLIB::getFPTOSINT(Op0VT, OpVT)
2379 : RTLIB::getFPTOUINT(Op0VT, OpVT);
2380 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpectd fp-to-int conversion!");
2382 return ExpandLibCall(LC, Op, DAG, false, Dummy, TLI);
2388 //! Lower ISD::SINT_TO_FP, ISD::UINT_TO_FP for i32
2390 i32->f32 passes through unchanged, whereas i32->f64 is expanded to a libcall.
2391 All conversions from i64 are expanded to a libcall.
2393 static SDValue LowerINT_TO_FP(SDValue Op, SelectionDAG &DAG,
2394 SPUTargetLowering &TLI) {
2395 EVT OpVT = Op.getValueType();
2396 SDValue Op0 = Op.getOperand(0);
2397 EVT Op0VT = Op0.getValueType();
2399 if ((OpVT == MVT::f64 && Op0VT == MVT::i32)
2400 || Op0VT == MVT::i64) {
2401 // Convert i32, i64 to f64 via libcall:
2403 (Op.getOpcode() == ISD::SINT_TO_FP)
2404 ? RTLIB::getSINTTOFP(Op0VT, OpVT)
2405 : RTLIB::getUINTTOFP(Op0VT, OpVT);
2406 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unexpectd int-to-fp conversion!");
2408 return ExpandLibCall(LC, Op, DAG, false, Dummy, TLI);
2414 //! Lower ISD::SETCC
2416 This handles MVT::f64 (double floating point) condition lowering
2418 static SDValue LowerSETCC(SDValue Op, SelectionDAG &DAG,
2419 const TargetLowering &TLI) {
2420 CondCodeSDNode *CC = dyn_cast<CondCodeSDNode>(Op.getOperand(2));
2421 DebugLoc dl = Op.getDebugLoc();
2422 assert(CC != 0 && "LowerSETCC: CondCodeSDNode should not be null here!\n");
2424 SDValue lhs = Op.getOperand(0);
2425 SDValue rhs = Op.getOperand(1);
2426 EVT lhsVT = lhs.getValueType();
2427 assert(lhsVT == MVT::f64 && "LowerSETCC: type other than MVT::64\n");
2429 EVT ccResultVT = TLI.getSetCCResultType(lhs.getValueType());
2430 APInt ccResultOnes = APInt::getAllOnesValue(ccResultVT.getSizeInBits());
2431 EVT IntVT(MVT::i64);
2433 // Take advantage of the fact that (truncate (sra arg, 32)) is efficiently
2434 // selected to a NOP:
2435 SDValue i64lhs = DAG.getNode(ISD::BIT_CONVERT, dl, IntVT, lhs);
2437 DAG.getNode(ISD::TRUNCATE, dl, MVT::i32,
2438 DAG.getNode(ISD::SRL, dl, IntVT,
2439 i64lhs, DAG.getConstant(32, MVT::i32)));
2440 SDValue lhsHi32abs =
2441 DAG.getNode(ISD::AND, dl, MVT::i32,
2442 lhsHi32, DAG.getConstant(0x7fffffff, MVT::i32));
2444 DAG.getNode(ISD::TRUNCATE, dl, MVT::i32, i64lhs);
2446 // SETO and SETUO only use the lhs operand:
2447 if (CC->get() == ISD::SETO) {
2448 // Evaluates to true if Op0 is not [SQ]NaN - lowers to the inverse of
2450 APInt ccResultAllOnes = APInt::getAllOnesValue(ccResultVT.getSizeInBits());
2451 return DAG.getNode(ISD::XOR, dl, ccResultVT,
2452 DAG.getSetCC(dl, ccResultVT,
2453 lhs, DAG.getConstantFP(0.0, lhsVT),
2455 DAG.getConstant(ccResultAllOnes, ccResultVT));
2456 } else if (CC->get() == ISD::SETUO) {
2457 // Evaluates to true if Op0 is [SQ]NaN
2458 return DAG.getNode(ISD::AND, dl, ccResultVT,
2459 DAG.getSetCC(dl, ccResultVT,
2461 DAG.getConstant(0x7ff00000, MVT::i32),
2463 DAG.getSetCC(dl, ccResultVT,
2465 DAG.getConstant(0, MVT::i32),
2469 SDValue i64rhs = DAG.getNode(ISD::BIT_CONVERT, dl, IntVT, rhs);
2471 DAG.getNode(ISD::TRUNCATE, dl, MVT::i32,
2472 DAG.getNode(ISD::SRL, dl, IntVT,
2473 i64rhs, DAG.getConstant(32, MVT::i32)));
2475 // If a value is negative, subtract from the sign magnitude constant:
2476 SDValue signMag2TC = DAG.getConstant(0x8000000000000000ULL, IntVT);
2478 // Convert the sign-magnitude representation into 2's complement:
2479 SDValue lhsSelectMask = DAG.getNode(ISD::SRA, dl, ccResultVT,
2480 lhsHi32, DAG.getConstant(31, MVT::i32));
2481 SDValue lhsSignMag2TC = DAG.getNode(ISD::SUB, dl, IntVT, signMag2TC, i64lhs);
2483 DAG.getNode(ISD::SELECT, dl, IntVT,
2484 lhsSelectMask, lhsSignMag2TC, i64lhs);
2486 SDValue rhsSelectMask = DAG.getNode(ISD::SRA, dl, ccResultVT,
2487 rhsHi32, DAG.getConstant(31, MVT::i32));
2488 SDValue rhsSignMag2TC = DAG.getNode(ISD::SUB, dl, IntVT, signMag2TC, i64rhs);
2490 DAG.getNode(ISD::SELECT, dl, IntVT,
2491 rhsSelectMask, rhsSignMag2TC, i64rhs);
2495 switch (CC->get()) {
2498 compareOp = ISD::SETEQ; break;
2501 compareOp = ISD::SETGT; break;
2504 compareOp = ISD::SETGE; break;
2507 compareOp = ISD::SETLT; break;
2510 compareOp = ISD::SETLE; break;
2513 compareOp = ISD::SETNE; break;
2515 llvm_report_error("CellSPU ISel Select: unimplemented f64 condition");
2519 DAG.getSetCC(dl, ccResultVT, lhsSelect, rhsSelect,
2520 (ISD::CondCode) compareOp);
2522 if ((CC->get() & 0x8) == 0) {
2523 // Ordered comparison:
2524 SDValue lhsNaN = DAG.getSetCC(dl, ccResultVT,
2525 lhs, DAG.getConstantFP(0.0, MVT::f64),
2527 SDValue rhsNaN = DAG.getSetCC(dl, ccResultVT,
2528 rhs, DAG.getConstantFP(0.0, MVT::f64),
2530 SDValue ordered = DAG.getNode(ISD::AND, dl, ccResultVT, lhsNaN, rhsNaN);
2532 result = DAG.getNode(ISD::AND, dl, ccResultVT, ordered, result);
2538 //! Lower ISD::SELECT_CC
2540 ISD::SELECT_CC can (generally) be implemented directly on the SPU using the
2543 \note Need to revisit this in the future: if the code path through the true
2544 and false value computations is longer than the latency of a branch (6
2545 cycles), then it would be more advantageous to branch and insert a new basic
2546 block and branch on the condition. However, this code does not make that
2547 assumption, given the simplisitc uses so far.
2550 static SDValue LowerSELECT_CC(SDValue Op, SelectionDAG &DAG,
2551 const TargetLowering &TLI) {
2552 EVT VT = Op.getValueType();
2553 SDValue lhs = Op.getOperand(0);
2554 SDValue rhs = Op.getOperand(1);
2555 SDValue trueval = Op.getOperand(2);
2556 SDValue falseval = Op.getOperand(3);
2557 SDValue condition = Op.getOperand(4);
2558 DebugLoc dl = Op.getDebugLoc();
2560 // NOTE: SELB's arguments: $rA, $rB, $mask
2562 // SELB selects bits from $rA where bits in $mask are 0, bits from $rB
2563 // where bits in $mask are 1. CCond will be inverted, having 1s where the
2564 // condition was true and 0s where the condition was false. Hence, the
2565 // arguments to SELB get reversed.
2567 // Note: Really should be ISD::SELECT instead of SPUISD::SELB, but LLVM's
2568 // legalizer insists on combining SETCC/SELECT into SELECT_CC, so we end up
2569 // with another "cannot select select_cc" assert:
2571 SDValue compare = DAG.getNode(ISD::SETCC, dl,
2572 TLI.getSetCCResultType(Op.getValueType()),
2573 lhs, rhs, condition);
2574 return DAG.getNode(SPUISD::SELB, dl, VT, falseval, trueval, compare);
2577 //! Custom lower ISD::TRUNCATE
2578 static SDValue LowerTRUNCATE(SDValue Op, SelectionDAG &DAG)
2580 // Type to truncate to
2581 EVT VT = Op.getValueType();
2582 MVT simpleVT = VT.getSimpleVT();
2583 EVT VecVT = EVT::getVectorVT(*DAG.getContext(),
2584 VT, (128 / VT.getSizeInBits()));
2585 DebugLoc dl = Op.getDebugLoc();
2587 // Type to truncate from
2588 SDValue Op0 = Op.getOperand(0);
2589 EVT Op0VT = Op0.getValueType();
2591 if (Op0VT.getSimpleVT() == MVT::i128 && simpleVT == MVT::i64) {
2592 // Create shuffle mask, least significant doubleword of quadword
2593 unsigned maskHigh = 0x08090a0b;
2594 unsigned maskLow = 0x0c0d0e0f;
2595 // Use a shuffle to perform the truncation
2596 SDValue shufMask = DAG.getNode(ISD::BUILD_VECTOR, dl, MVT::v4i32,
2597 DAG.getConstant(maskHigh, MVT::i32),
2598 DAG.getConstant(maskLow, MVT::i32),
2599 DAG.getConstant(maskHigh, MVT::i32),
2600 DAG.getConstant(maskLow, MVT::i32));
2602 SDValue truncShuffle = DAG.getNode(SPUISD::SHUFB, dl, VecVT,
2603 Op0, Op0, shufMask);
2605 return DAG.getNode(SPUISD::VEC2PREFSLOT, dl, VT, truncShuffle);
2608 return SDValue(); // Leave the truncate unmolested
2611 //! Custom (target-specific) lowering entry point
2613 This is where LLVM's DAG selection process calls to do target-specific
2617 SPUTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG)
2619 unsigned Opc = (unsigned) Op.getOpcode();
2620 EVT VT = Op.getValueType();
2625 errs() << "SPUTargetLowering::LowerOperation(): need to lower this!\n";
2626 errs() << "Op.getOpcode() = " << Opc << "\n";
2627 errs() << "*Op.getNode():\n";
2628 Op.getNode()->dump();
2630 llvm_unreachable(0);
2636 return LowerLOAD(Op, DAG, SPUTM.getSubtargetImpl());
2638 return LowerSTORE(Op, DAG, SPUTM.getSubtargetImpl());
2639 case ISD::ConstantPool:
2640 return LowerConstantPool(Op, DAG, SPUTM.getSubtargetImpl());
2641 case ISD::GlobalAddress:
2642 return LowerGlobalAddress(Op, DAG, SPUTM.getSubtargetImpl());
2643 case ISD::JumpTable:
2644 return LowerJumpTable(Op, DAG, SPUTM.getSubtargetImpl());
2645 case ISD::ConstantFP:
2646 return LowerConstantFP(Op, DAG);
2648 // i8, i64 math ops:
2657 return LowerI8Math(Op, DAG, Opc, *this);
2661 case ISD::FP_TO_SINT:
2662 case ISD::FP_TO_UINT:
2663 return LowerFP_TO_INT(Op, DAG, *this);
2665 case ISD::SINT_TO_FP:
2666 case ISD::UINT_TO_FP:
2667 return LowerINT_TO_FP(Op, DAG, *this);
2669 // Vector-related lowering.
2670 case ISD::BUILD_VECTOR:
2671 return LowerBUILD_VECTOR(Op, DAG);
2672 case ISD::SCALAR_TO_VECTOR:
2673 return LowerSCALAR_TO_VECTOR(Op, DAG);
2674 case ISD::VECTOR_SHUFFLE:
2675 return LowerVECTOR_SHUFFLE(Op, DAG);
2676 case ISD::EXTRACT_VECTOR_ELT:
2677 return LowerEXTRACT_VECTOR_ELT(Op, DAG);
2678 case ISD::INSERT_VECTOR_ELT:
2679 return LowerINSERT_VECTOR_ELT(Op, DAG);
2681 // Look for ANDBI, ORBI and XORBI opportunities and lower appropriately:
2685 return LowerByteImmed(Op, DAG);
2687 // Vector and i8 multiply:
2690 return LowerI8Math(Op, DAG, Opc, *this);
2693 return LowerCTPOP(Op, DAG);
2695 case ISD::SELECT_CC:
2696 return LowerSELECT_CC(Op, DAG, *this);
2699 return LowerSETCC(Op, DAG, *this);
2702 return LowerTRUNCATE(Op, DAG);
2708 void SPUTargetLowering::ReplaceNodeResults(SDNode *N,
2709 SmallVectorImpl<SDValue>&Results,
2713 unsigned Opc = (unsigned) N->getOpcode();
2714 EVT OpVT = N->getValueType(0);
2718 errs() << "SPUTargetLowering::ReplaceNodeResults(): need to fix this!\n";
2719 errs() << "Op.getOpcode() = " << Opc << "\n";
2720 errs() << "*Op.getNode():\n";
2728 /* Otherwise, return unchanged */
2731 //===----------------------------------------------------------------------===//
2732 // Target Optimization Hooks
2733 //===----------------------------------------------------------------------===//
2736 SPUTargetLowering::PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const
2739 TargetMachine &TM = getTargetMachine();
2741 const SPUSubtarget *ST = SPUTM.getSubtargetImpl();
2742 SelectionDAG &DAG = DCI.DAG;
2743 SDValue Op0 = N->getOperand(0); // everything has at least one operand
2744 EVT NodeVT = N->getValueType(0); // The node's value type
2745 EVT Op0VT = Op0.getValueType(); // The first operand's result
2746 SDValue Result; // Initially, empty result
2747 DebugLoc dl = N->getDebugLoc();
2749 switch (N->getOpcode()) {
2752 SDValue Op1 = N->getOperand(1);
2754 if (Op0.getOpcode() == SPUISD::IndirectAddr
2755 || Op1.getOpcode() == SPUISD::IndirectAddr) {
2756 // Normalize the operands to reduce repeated code
2757 SDValue IndirectArg = Op0, AddArg = Op1;
2759 if (Op1.getOpcode() == SPUISD::IndirectAddr) {
2764 if (isa<ConstantSDNode>(AddArg)) {
2765 ConstantSDNode *CN0 = cast<ConstantSDNode > (AddArg);
2766 SDValue IndOp1 = IndirectArg.getOperand(1);
2768 if (CN0->isNullValue()) {
2769 // (add (SPUindirect <arg>, <arg>), 0) ->
2770 // (SPUindirect <arg>, <arg>)
2772 #if !defined(NDEBUG)
2773 if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
2775 << "Replace: (add (SPUindirect <arg>, <arg>), 0)\n"
2776 << "With: (SPUindirect <arg>, <arg>)\n";
2781 } else if (isa<ConstantSDNode>(IndOp1)) {
2782 // (add (SPUindirect <arg>, <const>), <const>) ->
2783 // (SPUindirect <arg>, <const + const>)
2784 ConstantSDNode *CN1 = cast<ConstantSDNode > (IndOp1);
2785 int64_t combinedConst = CN0->getSExtValue() + CN1->getSExtValue();
2786 SDValue combinedValue = DAG.getConstant(combinedConst, Op0VT);
2788 #if !defined(NDEBUG)
2789 if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
2791 << "Replace: (add (SPUindirect <arg>, " << CN1->getSExtValue()
2792 << "), " << CN0->getSExtValue() << ")\n"
2793 << "With: (SPUindirect <arg>, "
2794 << combinedConst << ")\n";
2798 return DAG.getNode(SPUISD::IndirectAddr, dl, Op0VT,
2799 IndirectArg, combinedValue);
2805 case ISD::SIGN_EXTEND:
2806 case ISD::ZERO_EXTEND:
2807 case ISD::ANY_EXTEND: {
2808 if (Op0.getOpcode() == SPUISD::VEC2PREFSLOT && NodeVT == Op0VT) {
2809 // (any_extend (SPUextract_elt0 <arg>)) ->
2810 // (SPUextract_elt0 <arg>)
2811 // Types must match, however...
2812 #if !defined(NDEBUG)
2813 if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
2814 errs() << "\nReplace: ";
2816 errs() << "\nWith: ";
2817 Op0.getNode()->dump(&DAG);
2826 case SPUISD::IndirectAddr: {
2827 if (!ST->usingLargeMem() && Op0.getOpcode() == SPUISD::AFormAddr) {
2828 ConstantSDNode *CN = dyn_cast<ConstantSDNode>(N->getOperand(1));
2829 if (CN != 0 && CN->getZExtValue() == 0) {
2830 // (SPUindirect (SPUaform <addr>, 0), 0) ->
2831 // (SPUaform <addr>, 0)
2833 DEBUG(errs() << "Replace: ");
2834 DEBUG(N->dump(&DAG));
2835 DEBUG(errs() << "\nWith: ");
2836 DEBUG(Op0.getNode()->dump(&DAG));
2837 DEBUG(errs() << "\n");
2841 } else if (Op0.getOpcode() == ISD::ADD) {
2842 SDValue Op1 = N->getOperand(1);
2843 if (ConstantSDNode *CN1 = dyn_cast<ConstantSDNode>(Op1)) {
2844 // (SPUindirect (add <arg>, <arg>), 0) ->
2845 // (SPUindirect <arg>, <arg>)
2846 if (CN1->isNullValue()) {
2848 #if !defined(NDEBUG)
2849 if (DebugFlag && isCurrentDebugType(DEBUG_TYPE)) {
2851 << "Replace: (SPUindirect (add <arg>, <arg>), 0)\n"
2852 << "With: (SPUindirect <arg>, <arg>)\n";
2856 return DAG.getNode(SPUISD::IndirectAddr, dl, Op0VT,
2857 Op0.getOperand(0), Op0.getOperand(1));
2863 case SPUISD::SHLQUAD_L_BITS:
2864 case SPUISD::SHLQUAD_L_BYTES:
2865 case SPUISD::VEC_SHL:
2866 case SPUISD::VEC_SRL:
2867 case SPUISD::VEC_SRA:
2868 case SPUISD::ROTBYTES_LEFT: {
2869 SDValue Op1 = N->getOperand(1);
2871 // Kill degenerate vector shifts:
2872 if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Op1)) {
2873 if (CN->isNullValue()) {
2879 case SPUISD::PREFSLOT2VEC: {
2880 switch (Op0.getOpcode()) {
2883 case ISD::ANY_EXTEND:
2884 case ISD::ZERO_EXTEND:
2885 case ISD::SIGN_EXTEND: {
2886 // (SPUprefslot2vec (any|zero|sign_extend (SPUvec2prefslot <arg>))) ->
2888 // but only if the SPUprefslot2vec and <arg> types match.
2889 SDValue Op00 = Op0.getOperand(0);
2890 if (Op00.getOpcode() == SPUISD::VEC2PREFSLOT) {
2891 SDValue Op000 = Op00.getOperand(0);
2892 if (Op000.getValueType() == NodeVT) {
2898 case SPUISD::VEC2PREFSLOT: {
2899 // (SPUprefslot2vec (SPUvec2prefslot <arg>)) ->
2901 Result = Op0.getOperand(0);
2909 // Otherwise, return unchanged.
2911 if (Result.getNode()) {
2912 DEBUG(errs() << "\nReplace.SPU: ");
2913 DEBUG(N->dump(&DAG));
2914 DEBUG(errs() << "\nWith: ");
2915 DEBUG(Result.getNode()->dump(&DAG));
2916 DEBUG(errs() << "\n");
2923 //===----------------------------------------------------------------------===//
2924 // Inline Assembly Support
2925 //===----------------------------------------------------------------------===//
2927 /// getConstraintType - Given a constraint letter, return the type of
2928 /// constraint it is for this target.
2929 SPUTargetLowering::ConstraintType
2930 SPUTargetLowering::getConstraintType(const std::string &ConstraintLetter) const {
2931 if (ConstraintLetter.size() == 1) {
2932 switch (ConstraintLetter[0]) {
2939 return C_RegisterClass;
2942 return TargetLowering::getConstraintType(ConstraintLetter);
2945 std::pair<unsigned, const TargetRegisterClass*>
2946 SPUTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
2949 if (Constraint.size() == 1) {
2950 // GCC RS6000 Constraint Letters
2951 switch (Constraint[0]) {
2955 return std::make_pair(0U, SPU::R64CRegisterClass);
2956 return std::make_pair(0U, SPU::R32CRegisterClass);
2959 return std::make_pair(0U, SPU::R32FPRegisterClass);
2960 else if (VT == MVT::f64)
2961 return std::make_pair(0U, SPU::R64FPRegisterClass);
2964 return std::make_pair(0U, SPU::GPRCRegisterClass);
2968 return TargetLowering::getRegForInlineAsmConstraint(Constraint, VT);
2971 //! Compute used/known bits for a SPU operand
2973 SPUTargetLowering::computeMaskedBitsForTargetNode(const SDValue Op,
2977 const SelectionDAG &DAG,
2978 unsigned Depth ) const {
2980 const uint64_t uint64_sizebits = sizeof(uint64_t) * CHAR_BIT;
2982 switch (Op.getOpcode()) {
2984 // KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0);
2990 case SPUISD::PREFSLOT2VEC:
2991 case SPUISD::LDRESULT:
2992 case SPUISD::VEC2PREFSLOT:
2993 case SPUISD::SHLQUAD_L_BITS:
2994 case SPUISD::SHLQUAD_L_BYTES:
2995 case SPUISD::VEC_SHL:
2996 case SPUISD::VEC_SRL:
2997 case SPUISD::VEC_SRA:
2998 case SPUISD::VEC_ROTL:
2999 case SPUISD::VEC_ROTR:
3000 case SPUISD::ROTBYTES_LEFT:
3001 case SPUISD::SELECT_MASK:
3008 SPUTargetLowering::ComputeNumSignBitsForTargetNode(SDValue Op,
3009 unsigned Depth) const {
3010 switch (Op.getOpcode()) {
3015 EVT VT = Op.getValueType();
3017 if (VT != MVT::i8 && VT != MVT::i16 && VT != MVT::i32) {
3020 return VT.getSizeInBits();
3025 // LowerAsmOperandForConstraint
3027 SPUTargetLowering::LowerAsmOperandForConstraint(SDValue Op,
3028 char ConstraintLetter,
3030 std::vector<SDValue> &Ops,
3031 SelectionDAG &DAG) const {
3032 // Default, for the time being, to the base class handler
3033 TargetLowering::LowerAsmOperandForConstraint(Op, ConstraintLetter, hasMemory,
3037 /// isLegalAddressImmediate - Return true if the integer value can be used
3038 /// as the offset of the target addressing mode.
3039 bool SPUTargetLowering::isLegalAddressImmediate(int64_t V,
3040 const Type *Ty) const {
3041 // SPU's addresses are 256K:
3042 return (V > -(1 << 18) && V < (1 << 18) - 1);
3045 bool SPUTargetLowering::isLegalAddressImmediate(llvm::GlobalValue* GV) const {
3050 SPUTargetLowering::isOffsetFoldingLegal(const GlobalAddressSDNode *GA) const {
3051 // The SPU target isn't yet aware of offsets.