1 //===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
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 float type expansion and softening for LegalizeTypes.
11 // Softening is the act of turning a computation in an illegal floating point
12 // type into a computation in an integer type of the same size; also known as
13 // "soft float". For example, turning f32 arithmetic into operations using i32.
14 // The resulting integer value is the same as what you would get by performing
15 // the floating point operation and bitcasting the result to the integer type.
16 // Expansion is the act of changing a computation in an illegal type to be a
17 // computation in two identical registers of a smaller type. For example,
18 // implementing ppcf128 arithmetic in two f64 registers.
20 //===----------------------------------------------------------------------===//
22 #include "LegalizeTypes.h"
25 /// GetFPLibCall - Return the right libcall for the given floating point type.
26 static RTLIB::Libcall GetFPLibCall(MVT VT,
27 RTLIB::Libcall Call_F32,
28 RTLIB::Libcall Call_F64,
29 RTLIB::Libcall Call_F80,
30 RTLIB::Libcall Call_PPCF128) {
32 VT == MVT::f32 ? Call_F32 :
33 VT == MVT::f64 ? Call_F64 :
34 VT == MVT::f80 ? Call_F80 :
35 VT == MVT::ppcf128 ? Call_PPCF128 :
36 RTLIB::UNKNOWN_LIBCALL;
39 //===----------------------------------------------------------------------===//
40 // Result Float to Integer Conversion.
41 //===----------------------------------------------------------------------===//
43 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
44 DEBUG(cerr << "Soften float result " << ResNo << ": "; N->dump(&DAG);
46 SDValue R = SDValue();
48 switch (N->getOpcode()) {
51 cerr << "SoftenFloatResult #" << ResNo << ": ";
52 N->dump(&DAG); cerr << "\n";
54 assert(0 && "Do not know how to soften the result of this operator!");
57 case ISD::BIT_CONVERT: R = SoftenFloatRes_BIT_CONVERT(N); break;
58 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
60 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
62 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
63 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
64 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
65 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
66 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
67 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
68 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
69 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
70 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
71 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
72 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
73 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
74 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
76 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
79 // If R is null, the sub-method took care of registering the result.
81 SetSoftenedFloat(SDValue(N, ResNo), R);
84 SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
85 return BitConvertToInteger(N->getOperand(0));
88 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
89 // Convert the inputs to integers, and build a new pair out of them.
90 return DAG.getNode(ISD::BUILD_PAIR,
91 TLI.getTypeToTransformTo(N->getValueType(0)),
92 BitConvertToInteger(N->getOperand(0)),
93 BitConvertToInteger(N->getOperand(1)));
96 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
97 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
98 TLI.getTypeToTransformTo(N->getValueType(0)));
101 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
102 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
103 unsigned Size = NVT.getSizeInBits();
105 // Mask = ~(1 << (Size-1))
106 SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
108 SDValue Op = GetSoftenedFloat(N->getOperand(0));
109 return DAG.getNode(ISD::AND, NVT, Op, Mask);
112 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
113 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
114 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
115 GetSoftenedFloat(N->getOperand(1)) };
116 return MakeLibCall(GetFPLibCall(N->getValueType(0),
124 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
125 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
126 SDValue RHS = BitConvertToInteger(N->getOperand(1));
128 MVT LVT = LHS.getValueType();
129 MVT RVT = RHS.getValueType();
131 unsigned LSize = LVT.getSizeInBits();
132 unsigned RSize = RVT.getSizeInBits();
134 // First get the sign bit of second operand.
135 SDValue SignBit = DAG.getNode(ISD::SHL, RVT, DAG.getConstant(1, RVT),
136 DAG.getConstant(RSize - 1,
137 TLI.getShiftAmountTy()));
138 SignBit = DAG.getNode(ISD::AND, RVT, RHS, SignBit);
140 // Shift right or sign-extend it if the two operands have different types.
141 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
143 SignBit = DAG.getNode(ISD::SRL, RVT, SignBit,
144 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
145 SignBit = DAG.getNode(ISD::TRUNCATE, LVT, SignBit);
146 } else if (SizeDiff < 0) {
147 SignBit = DAG.getNode(ISD::ANY_EXTEND, LVT, SignBit);
148 SignBit = DAG.getNode(ISD::SHL, LVT, SignBit,
149 DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
152 // Clear the sign bit of the first operand.
153 SDValue Mask = DAG.getNode(ISD::SHL, LVT, DAG.getConstant(1, LVT),
154 DAG.getConstant(LSize - 1,
155 TLI.getShiftAmountTy()));
156 Mask = DAG.getNode(ISD::SUB, LVT, Mask, DAG.getConstant(1, LVT));
157 LHS = DAG.getNode(ISD::AND, LVT, LHS, Mask);
159 // Or the value with the sign bit.
160 return DAG.getNode(ISD::OR, LVT, LHS, SignBit);
163 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
164 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
165 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
166 GetSoftenedFloat(N->getOperand(1)) };
167 return MakeLibCall(GetFPLibCall(N->getValueType(0),
175 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
176 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
177 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
178 GetSoftenedFloat(N->getOperand(1)) };
179 return MakeLibCall(GetFPLibCall(N->getValueType(0),
187 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
188 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
189 SDValue Op = N->getOperand(0);
190 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
191 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
192 return MakeLibCall(LC, NVT, &Op, 1, false);
195 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
196 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
197 SDValue Op = N->getOperand(0);
198 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
199 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
200 return MakeLibCall(LC, NVT, &Op, 1, false);
203 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
204 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
205 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
206 GetSoftenedFloat(N->getOperand(1)) };
207 return MakeLibCall(GetFPLibCall(N->getValueType(0),
215 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
216 assert(N->getOperand(1).getValueType() == MVT::i32 &&
217 "Unsupported power type!");
218 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
219 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
220 return MakeLibCall(GetFPLibCall(N->getValueType(0),
224 RTLIB::POWI_PPCF128),
228 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
229 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
230 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
231 GetSoftenedFloat(N->getOperand(1)) };
232 return MakeLibCall(GetFPLibCall(N->getValueType(0),
240 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
241 LoadSDNode *L = cast<LoadSDNode>(N);
242 MVT VT = N->getValueType(0);
243 MVT NVT = TLI.getTypeToTransformTo(VT);
246 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
247 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
248 NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
249 L->getSrcValue(), L->getSrcValueOffset(), NVT,
250 L->isVolatile(), L->getAlignment());
251 // Legalized the chain result - switch anything that used the old chain to
253 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
257 // Do a non-extending load followed by FP_EXTEND.
258 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
259 L->getMemoryVT(), L->getChain(),
260 L->getBasePtr(), L->getOffset(),
261 L->getSrcValue(), L->getSrcValueOffset(),
263 L->isVolatile(), L->getAlignment());
264 // Legalized the chain result - switch anything that used the old chain to
266 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
267 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, VT, NewL));
270 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
271 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
272 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
273 return DAG.getNode(ISD::SELECT, LHS.getValueType(), N->getOperand(0),LHS,RHS);
276 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
277 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
278 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
279 return DAG.getNode(ISD::SELECT_CC, LHS.getValueType(), N->getOperand(0),
280 N->getOperand(1), LHS, RHS, N->getOperand(4));
283 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
284 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
285 MVT SVT = N->getOperand(0).getValueType();
286 MVT RVT = N->getValueType(0);
289 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
290 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
291 // match. Look for an appropriate libcall.
292 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
293 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
294 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
295 NVT = (MVT::SimpleValueType)t;
296 // The source needs to big enough to hold the operand.
298 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
300 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
302 // Sign/zero extend the argument if the libcall takes a larger type.
303 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
304 NVT, N->getOperand(0));
305 return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false);
309 //===----------------------------------------------------------------------===//
310 // Operand Float to Integer Conversion..
311 //===----------------------------------------------------------------------===//
313 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
314 DEBUG(cerr << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
316 SDValue Res = SDValue();
318 switch (N->getOpcode()) {
321 cerr << "SoftenFloatOperand Op #" << OpNo << ": ";
322 N->dump(&DAG); cerr << "\n";
324 assert(0 && "Do not know how to soften this operator's operand!");
327 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
328 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
329 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
330 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
331 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
332 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
333 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
334 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
337 // If the result is null, the sub-method took care of registering results etc.
338 if (!Res.getNode()) return false;
340 // If the result is N, the sub-method updated N in place. Check to see if any
341 // operands are new, and if so, mark them.
342 if (Res.getNode() == N) {
343 // Mark N as new and remark N and its operands. This allows us to correctly
344 // revisit N if it needs another step of promotion and allows us to visit
345 // any new operands to N.
350 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
351 "Invalid operand expansion");
353 ReplaceValueWith(SDValue(N, 0), Res);
357 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
358 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
359 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
360 ISD::CondCode &CCCode) {
361 SDValue LHSInt = GetSoftenedFloat(NewLHS);
362 SDValue RHSInt = GetSoftenedFloat(NewRHS);
363 MVT VT = NewLHS.getValueType();
365 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
367 // Expand into one or more soft-fp libcall(s).
368 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
372 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
376 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
380 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
384 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
388 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
392 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
395 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
398 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
401 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
404 // SETONE = SETOLT | SETOGT
405 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
408 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
411 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
414 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
417 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
420 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
422 default: assert(false && "Do not know how to soften this setcc!");
426 MVT RetVT = MVT::i32; // FIXME: is this the correct return type?
427 SDValue Ops[2] = { LHSInt, RHSInt };
428 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/);
429 NewRHS = DAG.getConstant(0, RetVT);
430 CCCode = TLI.getCmpLibcallCC(LC1);
431 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
432 SDValue Tmp = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(NewLHS),
433 NewLHS, NewRHS, DAG.getCondCode(CCCode));
434 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/);
435 NewLHS = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(NewLHS), NewLHS,
436 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
437 NewLHS = DAG.getNode(ISD::OR, Tmp.getValueType(), Tmp, NewLHS);
442 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
443 return DAG.getNode(ISD::BIT_CONVERT, N->getValueType(0),
444 GetSoftenedFloat(N->getOperand(0)));
447 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
448 MVT SVT = N->getOperand(0).getValueType();
449 MVT RVT = N->getValueType(0);
451 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
452 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
454 SDValue Op = GetSoftenedFloat(N->getOperand(0));
455 return MakeLibCall(LC, RVT, &Op, 1, false);
458 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
459 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
460 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
461 SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
463 // If SoftenSetCCOperands returned a scalar, we need to compare the result
464 // against zero to select between true and false values.
465 if (NewRHS.getNode() == 0) {
466 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
470 // Update N to have the operands specified.
471 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
472 DAG.getCondCode(CCCode), NewLHS, NewRHS,
476 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
477 MVT RVT = N->getValueType(0);
478 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
479 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
480 SDValue Op = GetSoftenedFloat(N->getOperand(0));
481 return MakeLibCall(LC, RVT, &Op, 1, false);
484 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
485 MVT RVT = N->getValueType(0);
486 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
487 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
488 SDValue Op = GetSoftenedFloat(N->getOperand(0));
489 return MakeLibCall(LC, RVT, &Op, 1, false);
492 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
493 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
494 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
495 SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
497 // If SoftenSetCCOperands returned a scalar, we need to compare the result
498 // against zero to select between true and false values.
499 if (NewRHS.getNode() == 0) {
500 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
504 // Update N to have the operands specified.
505 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
506 N->getOperand(2), N->getOperand(3),
507 DAG.getCondCode(CCCode));
510 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
511 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
512 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
513 SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
515 // If SoftenSetCCOperands returned a scalar, use it.
516 if (NewRHS.getNode() == 0) {
517 assert(NewLHS.getValueType() == N->getValueType(0) &&
518 "Unexpected setcc expansion!");
522 // Otherwise, update N to have the operands specified.
523 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
524 DAG.getCondCode(CCCode));
527 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
528 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
529 assert(OpNo == 1 && "Can only soften the stored value!");
530 StoreSDNode *ST = cast<StoreSDNode>(N);
531 SDValue Val = ST->getValue();
533 if (ST->isTruncatingStore())
534 // Do an FP_ROUND followed by a non-truncating store.
535 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, ST->getMemoryVT(),
536 Val, DAG.getIntPtrConstant(0)));
538 Val = GetSoftenedFloat(Val);
540 return DAG.getStore(ST->getChain(), Val, ST->getBasePtr(),
541 ST->getSrcValue(), ST->getSrcValueOffset(),
542 ST->isVolatile(), ST->getAlignment());
546 //===----------------------------------------------------------------------===//
547 // Float Result Expansion
548 //===----------------------------------------------------------------------===//
550 /// ExpandFloatResult - This method is called when the specified result of the
551 /// specified node is found to need expansion. At this point, the node may also
552 /// have invalid operands or may have other results that need promotion, we just
553 /// know that (at least) one result needs expansion.
554 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
555 DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n");
559 // See if the target wants to custom expand this node.
560 if (TLI.getOperationAction(N->getOpcode(), N->getValueType(ResNo)) ==
561 TargetLowering::Custom) {
562 // If the target wants to, allow it to lower this itself.
563 if (SDNode *P = TLI.ReplaceNodeResults(N, DAG)) {
564 // Everything that once used N now uses P. We are guaranteed that the
565 // result value types of N and the result value types of P match.
566 ReplaceNodeWith(N, P);
571 switch (N->getOpcode()) {
574 cerr << "ExpandFloatResult #" << ResNo << ": ";
575 N->dump(&DAG); cerr << "\n";
577 assert(0 && "Do not know how to expand the result of this operator!");
580 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
581 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
582 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
583 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
585 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
586 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
587 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
588 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
589 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
591 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
592 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
593 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
594 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
595 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
596 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
597 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
598 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
599 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
600 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
601 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
602 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
603 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
604 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
605 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
606 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
607 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
608 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
609 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
610 case ISD::FSIN: ExpandFloatRes_FABS(N, Lo, Hi); break;
611 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
612 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
613 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
614 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
615 case ISD::SINT_TO_FP:
616 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
619 // If Lo/Hi is null, the sub-method took care of registering results etc.
621 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
624 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
626 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
627 assert(NVT.getSizeInBits() == integerPartWidth &&
628 "Do not know how to expand this float constant!");
629 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
630 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
631 &C.getRawData()[1])), NVT);
632 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
633 &C.getRawData()[0])), NVT);
636 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
638 assert(N->getValueType(0) == MVT::ppcf128 &&
639 "Logic only correct for ppcf128!");
641 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
642 Hi = DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp);
643 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
644 Lo = DAG.getNode(ISD::SELECT_CC, Lo.getValueType(), Tmp, Hi, Lo,
645 DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo),
646 DAG.getCondCode(ISD::SETEQ));
649 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
651 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
652 RTLIB::ADD_F32, RTLIB::ADD_F64,
653 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
655 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
656 "Call lowered wrongly!");
657 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
660 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
661 SDValue &Lo, SDValue &Hi) {
662 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
663 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
664 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
666 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
667 "Call lowered wrongly!");
668 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
671 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
672 SDValue &Lo, SDValue &Hi) {
673 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
674 RTLIB::COS_F32, RTLIB::COS_F64,
675 RTLIB::COS_F80, RTLIB::COS_PPCF128),
677 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
678 "Call lowered wrongly!");
679 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
682 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
684 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
685 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
690 N->getValueType(0), Ops, 2, false);
691 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
692 "Call lowered wrongly!");
693 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
696 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
697 SDValue &Lo, SDValue &Hi) {
698 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
699 RTLIB::EXP_F32, RTLIB::EXP_F64,
700 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
702 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
703 "Call lowered wrongly!");
704 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
707 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
708 SDValue &Lo, SDValue &Hi) {
709 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
710 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
711 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
713 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
714 "Call lowered wrongly!");
715 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
718 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
719 SDValue &Lo, SDValue &Hi) {
720 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
721 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
722 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
724 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
725 "Call lowered wrongly!");
726 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
729 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
730 SDValue &Lo, SDValue &Hi) {
731 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
732 RTLIB::LOG_F32, RTLIB::LOG_F64,
733 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
735 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
736 "Call lowered wrongly!");
737 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
740 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
741 SDValue &Lo, SDValue &Hi) {
742 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
743 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
744 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
746 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
747 "Call lowered wrongly!");
748 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
751 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
752 SDValue &Lo, SDValue &Hi) {
753 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
754 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
755 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
757 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
758 "Call lowered wrongly!");
759 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
762 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
764 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
765 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
770 N->getValueType(0), Ops, 2, false);
771 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
772 "Call lowered wrongly!");
773 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
776 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
777 SDValue &Lo, SDValue &Hi) {
778 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
779 RTLIB::NEARBYINT_F32,
780 RTLIB::NEARBYINT_F64,
781 RTLIB::NEARBYINT_F80,
782 RTLIB::NEARBYINT_PPCF128),
784 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
785 "Call lowered wrongly!");
786 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
789 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
791 GetExpandedFloat(N->getOperand(0), Lo, Hi);
792 Lo = DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo);
793 Hi = DAG.getNode(ISD::FNEG, Hi.getValueType(), Hi);
796 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
798 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
799 Hi = DAG.getNode(ISD::FP_EXTEND, NVT, N->getOperand(0));
800 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
803 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
804 SDValue &Lo, SDValue &Hi) {
805 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
806 RTLIB::POW_F32, RTLIB::POW_F64,
807 RTLIB::POW_F80, RTLIB::POW_PPCF128),
809 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
810 "Call lowered wrongly!");
811 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
814 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
815 SDValue &Lo, SDValue &Hi) {
816 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
817 RTLIB::POWI_F32, RTLIB::POWI_F64,
818 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
820 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
821 "Call lowered wrongly!");
822 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
825 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
826 SDValue &Lo, SDValue &Hi) {
827 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
828 RTLIB::RINT_F32, RTLIB::RINT_F64,
829 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
831 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
832 "Call lowered wrongly!");
833 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
836 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
837 SDValue &Lo, SDValue &Hi) {
838 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
839 RTLIB::SIN_F32, RTLIB::SIN_F64,
840 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
842 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
843 "Call lowered wrongly!");
844 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
847 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
848 SDValue &Lo, SDValue &Hi) {
849 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
850 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
851 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
853 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
854 "Call lowered wrongly!");
855 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
858 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
860 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
861 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
866 N->getValueType(0), Ops, 2, false);
867 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
868 "Call lowered wrongly!");
869 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
872 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
873 SDValue &Lo, SDValue &Hi) {
874 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
875 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
876 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
878 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
879 "Call lowered wrongly!");
880 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
883 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
885 if (ISD::isNormalLoad(N)) {
886 ExpandRes_NormalLoad(N, Lo, Hi);
890 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
891 LoadSDNode *LD = cast<LoadSDNode>(N);
892 SDValue Chain = LD->getChain();
893 SDValue Ptr = LD->getBasePtr();
895 MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
896 assert(NVT.isByteSized() && "Expanded type not byte sized!");
897 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
899 Hi = DAG.getExtLoad(LD->getExtensionType(), NVT, Chain, Ptr,
900 LD->getSrcValue(), LD->getSrcValueOffset(),
902 LD->isVolatile(), LD->getAlignment());
904 // Remember the chain.
905 Chain = Hi.getValue(1);
907 // The low part is zero.
908 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
910 // Modified the chain - switch anything that used the old chain to use the
912 ReplaceValueWith(SDValue(LD, 1), Chain);
915 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
917 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
918 MVT VT = N->getValueType(0);
919 MVT NVT = TLI.getTypeToTransformTo(VT);
920 SDValue Src = N->getOperand(0);
921 MVT SrcVT = Src.getValueType();
922 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
924 // First do an SINT_TO_FP, whether the original was signed or unsigned.
925 // When promoting partial word types to i32 we must honor the signedness,
927 if (SrcVT.bitsLE(MVT::i32)) {
928 // The integer can be represented exactly in an f64.
929 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
931 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
932 Hi = DAG.getNode(ISD::SINT_TO_FP, NVT, Src);
934 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
935 if (SrcVT.bitsLE(MVT::i64)) {
936 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
938 LC = RTLIB::SINTTOFP_I64_PPCF128;
939 } else if (SrcVT.bitsLE(MVT::i128)) {
940 Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i128, Src);
941 LC = RTLIB::SINTTOFP_I128_PPCF128;
943 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
945 Hi = MakeLibCall(LC, VT, &Src, 1, true);
946 assert(Hi.getNode()->getOpcode() == ISD::BUILD_PAIR &&
947 "Call lowered wrongly!");
948 Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
954 // Unsigned - fix up the SINT_TO_FP value just calculated.
955 Hi = DAG.getNode(ISD::BUILD_PAIR, VT, Lo, Hi);
956 SrcVT = Src.getValueType();
958 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
959 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
960 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
961 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
962 const uint64_t *Parts = 0;
964 switch (SrcVT.getSimpleVT()) {
966 assert(false && "Unsupported UINT_TO_FP!");
978 Lo = DAG.getNode(ISD::FADD, VT, Hi,
979 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
981 Lo = DAG.getNode(ISD::SELECT_CC, VT, Src, DAG.getConstant(0, SrcVT), Lo, Hi,
982 DAG.getCondCode(ISD::SETLT));
983 Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(1));
984 Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(0));
988 //===----------------------------------------------------------------------===//
989 // Float Operand Expansion
990 //===----------------------------------------------------------------------===//
992 /// ExpandFloatOperand - This method is called when the specified operand of the
993 /// specified node is found to need expansion. At this point, all of the result
994 /// types of the node are known to be legal, but other operands of the node may
995 /// need promotion or expansion as well as the specified one.
996 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
997 DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n");
998 SDValue Res = SDValue();
1000 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1001 == TargetLowering::Custom)
1002 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1004 if (Res.getNode() == 0) {
1005 switch (N->getOpcode()) {
1008 cerr << "ExpandFloatOperand Op #" << OpNo << ": ";
1009 N->dump(&DAG); cerr << "\n";
1011 assert(0 && "Do not know how to expand this operator's operand!");
1014 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1015 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1016 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1018 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1019 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1020 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1021 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1022 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1023 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1024 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1029 // If the result is null, the sub-method took care of registering results etc.
1030 if (!Res.getNode()) return false;
1031 // If the result is N, the sub-method updated N in place. Check to see if any
1032 // operands are new, and if so, mark them.
1033 if (Res.getNode() == N) {
1034 // Mark N as new and remark N and its operands. This allows us to correctly
1035 // revisit N if it needs another step of expansion and allows us to visit
1036 // any new operands to N.
1041 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1042 "Invalid operand expansion");
1044 ReplaceValueWith(SDValue(N, 0), Res);
1048 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1049 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1050 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1052 ISD::CondCode &CCCode) {
1053 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1054 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1055 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1057 MVT VT = NewLHS.getValueType();
1058 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1060 // FIXME: This generated code sucks. We want to generate
1061 // FCMPU crN, hi1, hi2
1063 // FCMPU crN, lo1, lo2
1064 // The following can be improved, but not that much.
1065 SDValue Tmp1, Tmp2, Tmp3;
1066 Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETOEQ);
1067 Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSLo), LHSLo, RHSLo, CCCode);
1068 Tmp3 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1069 Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETUNE);
1070 Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, CCCode);
1071 Tmp1 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1072 NewLHS = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp3);
1073 NewRHS = SDValue(); // LHS is the result, not a compare.
1076 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1077 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1078 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1079 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1081 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1082 // against zero to select between true and false values.
1083 if (NewRHS.getNode() == 0) {
1084 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1085 CCCode = ISD::SETNE;
1088 // Update N to have the operands specified.
1089 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1090 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1094 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1095 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1096 "Logic only correct for ppcf128!");
1098 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1099 // Round it the rest of the way (e.g. to f32) if needed.
1100 return DAG.getNode(ISD::FP_ROUND, N->getValueType(0), Hi, N->getOperand(1));
1103 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1104 MVT RVT = N->getValueType(0);
1106 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1107 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1108 if (RVT == MVT::i32) {
1109 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1110 "Logic only correct for ppcf128!");
1111 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, MVT::ppcf128,
1112 N->getOperand(0), DAG.getValueType(MVT::f64));
1113 Res = DAG.getNode(ISD::FP_ROUND, MVT::f64, Res, DAG.getIntPtrConstant(1));
1114 return DAG.getNode(ISD::FP_TO_SINT, MVT::i32, Res);
1117 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1118 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1119 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false);
1122 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1123 MVT RVT = N->getValueType(0);
1125 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1126 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1127 if (RVT == MVT::i32) {
1128 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1129 "Logic only correct for ppcf128!");
1130 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1131 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1132 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1133 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1134 // FIXME: generated code sucks.
1135 return DAG.getNode(ISD::SELECT_CC, MVT::i32, N->getOperand(0), Tmp,
1136 DAG.getNode(ISD::ADD, MVT::i32,
1137 DAG.getNode(ISD::FP_TO_SINT, MVT::i32,
1138 DAG.getNode(ISD::FSUB,
1142 DAG.getConstant(0x80000000, MVT::i32)),
1143 DAG.getNode(ISD::FP_TO_SINT, MVT::i32, N->getOperand(0)),
1144 DAG.getCondCode(ISD::SETGE));
1147 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1148 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1149 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false);
1152 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1153 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1154 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1155 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1157 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1158 // against zero to select between true and false values.
1159 if (NewRHS.getNode() == 0) {
1160 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1161 CCCode = ISD::SETNE;
1164 // Update N to have the operands specified.
1165 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1166 N->getOperand(2), N->getOperand(3),
1167 DAG.getCondCode(CCCode));
1170 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1171 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1172 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1173 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1175 // If ExpandSetCCOperands returned a scalar, use it.
1176 if (NewRHS.getNode() == 0) {
1177 assert(NewLHS.getValueType() == N->getValueType(0) &&
1178 "Unexpected setcc expansion!");
1182 // Otherwise, update N to have the operands specified.
1183 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1184 DAG.getCondCode(CCCode));
1187 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1188 if (ISD::isNormalStore(N))
1189 return ExpandOp_NormalStore(N, OpNo);
1191 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1192 assert(OpNo == 1 && "Can only expand the stored value so far");
1193 StoreSDNode *ST = cast<StoreSDNode>(N);
1195 SDValue Chain = ST->getChain();
1196 SDValue Ptr = ST->getBasePtr();
1198 MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType());
1199 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1200 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1203 GetExpandedOp(ST->getValue(), Lo, Hi);
1205 return DAG.getTruncStore(Chain, Hi, Ptr,
1206 ST->getSrcValue(), ST->getSrcValueOffset(),
1208 ST->isVolatile(), ST->getAlignment());