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;
75 case ISD::SINT_TO_FP: R = SoftenFloatRes_SINT_TO_FP(N); break;
76 case ISD::UINT_TO_FP: R = SoftenFloatRes_UINT_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 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
217 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
218 return MakeLibCall(GetFPLibCall(N->getValueType(0),
222 RTLIB::POWI_PPCF128),
226 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
227 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
228 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
229 GetSoftenedFloat(N->getOperand(1)) };
230 return MakeLibCall(GetFPLibCall(N->getValueType(0),
238 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
239 LoadSDNode *L = cast<LoadSDNode>(N);
240 MVT VT = N->getValueType(0);
241 MVT NVT = TLI.getTypeToTransformTo(VT);
244 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
245 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
246 NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
247 L->getSrcValue(), L->getSrcValueOffset(), NVT,
248 L->isVolatile(), L->getAlignment());
249 // Legalized the chain result - switch anything that used the old chain to
251 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
255 // Do a non-extending load followed by FP_EXTEND.
256 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
257 L->getMemoryVT(), L->getChain(),
258 L->getBasePtr(), L->getOffset(),
259 L->getSrcValue(), L->getSrcValueOffset(),
261 L->isVolatile(), L->getAlignment());
262 // Legalized the chain result - switch anything that used the old chain to
264 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
265 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, VT, NewL));
268 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
269 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
270 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
271 return DAG.getNode(ISD::SELECT, LHS.getValueType(), N->getOperand(0),LHS,RHS);
274 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
275 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
276 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
277 return DAG.getNode(ISD::SELECT_CC, LHS.getValueType(), N->getOperand(0),
278 N->getOperand(1), LHS, RHS, N->getOperand(4));
281 SDValue DAGTypeLegalizer::SoftenFloatRes_SINT_TO_FP(SDNode *N) {
282 SDValue Op = N->getOperand(0);
283 MVT RVT = N->getValueType(0);
284 RTLIB::Libcall LC = RTLIB::getSINTTOFP(Op.getValueType(), RVT);
285 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported SINT_TO_FP!");
286 return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false);
289 SDValue DAGTypeLegalizer::SoftenFloatRes_UINT_TO_FP(SDNode *N) {
290 SDValue Op = N->getOperand(0);
291 MVT RVT = N->getValueType(0);
292 RTLIB::Libcall LC = RTLIB::getUINTTOFP(Op.getValueType(), RVT);
293 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported UINT_TO_FP!");
294 return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false);
298 //===----------------------------------------------------------------------===//
299 // Operand Float to Integer Conversion..
300 //===----------------------------------------------------------------------===//
302 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
303 DEBUG(cerr << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
305 SDValue Res = SDValue();
307 switch (N->getOpcode()) {
310 cerr << "SoftenFloatOperand Op #" << OpNo << ": ";
311 N->dump(&DAG); cerr << "\n";
313 assert(0 && "Do not know how to soften this operator's operand!");
316 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
317 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
318 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
319 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
320 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
321 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
322 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
323 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
326 // If the result is null, the sub-method took care of registering results etc.
327 if (!Res.getNode()) return false;
329 // If the result is N, the sub-method updated N in place. Check to see if any
330 // operands are new, and if so, mark them.
331 if (Res.getNode() == N) {
332 // Mark N as new and remark N and its operands. This allows us to correctly
333 // revisit N if it needs another step of promotion and allows us to visit
334 // any new operands to N.
339 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
340 "Invalid operand expansion");
342 ReplaceValueWith(SDValue(N, 0), Res);
346 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
347 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
348 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
349 ISD::CondCode &CCCode) {
350 SDValue LHSInt = GetSoftenedFloat(NewLHS);
351 SDValue RHSInt = GetSoftenedFloat(NewRHS);
352 MVT VT = NewLHS.getValueType();
354 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
356 // Expand into one or more soft-fp libcall(s).
357 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
361 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
365 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
369 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
373 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
377 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
381 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
384 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
387 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
390 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
393 // SETONE = SETOLT | SETOGT
394 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
397 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
400 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
403 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
406 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
409 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
411 default: assert(false && "Do not know how to soften this setcc!");
415 MVT RetVT = MVT::i32; // FIXME: is this the correct return type?
416 SDValue Ops[2] = { LHSInt, RHSInt };
417 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/);
418 NewRHS = DAG.getConstant(0, RetVT);
419 CCCode = TLI.getCmpLibcallCC(LC1);
420 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
421 SDValue Tmp = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(NewLHS),
422 NewLHS, NewRHS, DAG.getCondCode(CCCode));
423 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/);
424 NewLHS = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(NewLHS), NewLHS,
425 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
426 NewLHS = DAG.getNode(ISD::OR, Tmp.getValueType(), Tmp, NewLHS);
431 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
432 return DAG.getNode(ISD::BIT_CONVERT, N->getValueType(0),
433 GetSoftenedFloat(N->getOperand(0)));
436 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
437 MVT SVT = N->getOperand(0).getValueType();
438 MVT RVT = N->getValueType(0);
440 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
441 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
443 SDValue Op = GetSoftenedFloat(N->getOperand(0));
444 return MakeLibCall(LC, RVT, &Op, 1, false);
447 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
448 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
449 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
450 SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
452 // If SoftenSetCCOperands returned a scalar, we need to compare the result
453 // against zero to select between true and false values.
454 if (NewRHS.getNode() == 0) {
455 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
459 // Update N to have the operands specified.
460 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
461 DAG.getCondCode(CCCode), NewLHS, NewRHS,
465 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
466 MVT RVT = N->getValueType(0);
467 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
468 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
469 SDValue Op = GetSoftenedFloat(N->getOperand(0));
470 return MakeLibCall(LC, RVT, &Op, 1, false);
473 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
474 MVT RVT = N->getValueType(0);
475 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
476 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
477 SDValue Op = GetSoftenedFloat(N->getOperand(0));
478 return MakeLibCall(LC, RVT, &Op, 1, false);
481 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
482 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
483 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
484 SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
486 // If SoftenSetCCOperands returned a scalar, we need to compare the result
487 // against zero to select between true and false values.
488 if (NewRHS.getNode() == 0) {
489 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
493 // Update N to have the operands specified.
494 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
495 N->getOperand(2), N->getOperand(3),
496 DAG.getCondCode(CCCode));
499 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
500 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
501 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
502 SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
504 // If SoftenSetCCOperands returned a scalar, use it.
505 if (NewRHS.getNode() == 0) {
506 assert(NewLHS.getValueType() == N->getValueType(0) &&
507 "Unexpected setcc expansion!");
511 // Otherwise, update N to have the operands specified.
512 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
513 DAG.getCondCode(CCCode));
516 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
517 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
518 assert(OpNo == 1 && "Can only soften the stored value!");
519 StoreSDNode *ST = cast<StoreSDNode>(N);
520 SDValue Val = ST->getValue();
522 if (ST->isTruncatingStore())
523 // Do an FP_ROUND followed by a non-truncating store.
524 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, ST->getMemoryVT(),
525 Val, DAG.getIntPtrConstant(0)));
527 Val = GetSoftenedFloat(Val);
529 return DAG.getStore(ST->getChain(), Val, ST->getBasePtr(),
530 ST->getSrcValue(), ST->getSrcValueOffset(),
531 ST->isVolatile(), ST->getAlignment());
535 //===----------------------------------------------------------------------===//
536 // Float Result Expansion
537 //===----------------------------------------------------------------------===//
539 /// ExpandFloatResult - This method is called when the specified result of the
540 /// specified node is found to need expansion. At this point, the node may also
541 /// have invalid operands or may have other results that need promotion, we just
542 /// know that (at least) one result needs expansion.
543 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
544 DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n");
548 // See if the target wants to custom expand this node.
549 if (TLI.getOperationAction(N->getOpcode(), N->getValueType(ResNo)) ==
550 TargetLowering::Custom) {
551 // If the target wants to, allow it to lower this itself.
552 if (SDNode *P = TLI.ReplaceNodeResults(N, DAG)) {
553 // Everything that once used N now uses P. We are guaranteed that the
554 // result value types of N and the result value types of P match.
555 ReplaceNodeWith(N, P);
560 switch (N->getOpcode()) {
563 cerr << "ExpandFloatResult #" << ResNo << ": ";
564 N->dump(&DAG); cerr << "\n";
566 assert(0 && "Do not know how to expand the result of this operator!");
569 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
570 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
571 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
572 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
574 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
575 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
576 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
577 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
578 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
580 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
581 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
582 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
583 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
584 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
585 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
586 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
587 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
588 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
589 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
590 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
591 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
592 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
593 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
594 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
595 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
596 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
597 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
598 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
599 case ISD::FSIN: ExpandFloatRes_FABS(N, Lo, Hi); break;
600 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
601 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
602 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
603 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
604 case ISD::SINT_TO_FP:
605 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
608 // If Lo/Hi is null, the sub-method took care of registering results etc.
610 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
613 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
615 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
616 assert(NVT.getSizeInBits() == integerPartWidth &&
617 "Do not know how to expand this float constant!");
618 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
619 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
620 &C.getRawData()[1])), NVT);
621 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
622 &C.getRawData()[0])), NVT);
625 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
627 assert(N->getValueType(0) == MVT::ppcf128 &&
628 "Logic only correct for ppcf128!");
630 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
631 Hi = DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp);
632 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
633 Lo = DAG.getNode(ISD::SELECT_CC, Lo.getValueType(), Tmp, Hi, Lo,
634 DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo),
635 DAG.getCondCode(ISD::SETEQ));
638 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
640 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
641 RTLIB::ADD_F32, RTLIB::ADD_F64,
642 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
644 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
645 "Call lowered wrongly!");
646 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
649 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
650 SDValue &Lo, SDValue &Hi) {
651 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
652 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
653 RTLIB::CEIL_F80, RTLIB::CEIL_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_FCOS(SDNode *N,
661 SDValue &Lo, SDValue &Hi) {
662 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
663 RTLIB::COS_F32, RTLIB::COS_F64,
664 RTLIB::COS_F80, RTLIB::COS_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_FDIV(SDNode *N, SDValue &Lo,
673 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
674 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
679 N->getValueType(0), Ops, 2, false);
680 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
681 "Call lowered wrongly!");
682 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
685 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
686 SDValue &Lo, SDValue &Hi) {
687 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
688 RTLIB::EXP_F32, RTLIB::EXP_F64,
689 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
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_FEXP2(SDNode *N,
697 SDValue &Lo, SDValue &Hi) {
698 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
699 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
700 RTLIB::EXP2_F80, RTLIB::EXP2_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_FFLOOR(SDNode *N,
708 SDValue &Lo, SDValue &Hi) {
709 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
710 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
711 RTLIB::FLOOR_F80,RTLIB::FLOOR_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_FLOG(SDNode *N,
719 SDValue &Lo, SDValue &Hi) {
720 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
721 RTLIB::LOG_F32, RTLIB::LOG_F64,
722 RTLIB::LOG_F80, RTLIB::LOG_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_FLOG2(SDNode *N,
730 SDValue &Lo, SDValue &Hi) {
731 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
732 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
733 RTLIB::LOG2_F80, RTLIB::LOG2_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_FLOG10(SDNode *N,
741 SDValue &Lo, SDValue &Hi) {
742 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
743 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
744 RTLIB::LOG10_F80,RTLIB::LOG10_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_FMUL(SDNode *N, SDValue &Lo,
753 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
754 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
759 N->getValueType(0), Ops, 2, false);
760 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
761 "Call lowered wrongly!");
762 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
765 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
766 SDValue &Lo, SDValue &Hi) {
767 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
768 RTLIB::NEARBYINT_F32,
769 RTLIB::NEARBYINT_F64,
770 RTLIB::NEARBYINT_F80,
771 RTLIB::NEARBYINT_PPCF128),
773 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
774 "Call lowered wrongly!");
775 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
778 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
780 GetExpandedFloat(N->getOperand(0), Lo, Hi);
781 Lo = DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo);
782 Hi = DAG.getNode(ISD::FNEG, Hi.getValueType(), Hi);
785 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
787 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
788 Hi = DAG.getNode(ISD::FP_EXTEND, NVT, N->getOperand(0));
789 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
792 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
793 SDValue &Lo, SDValue &Hi) {
794 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
795 RTLIB::POW_F32, RTLIB::POW_F64,
796 RTLIB::POW_F80, RTLIB::POW_PPCF128),
798 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
799 "Call lowered wrongly!");
800 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
803 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
804 SDValue &Lo, SDValue &Hi) {
805 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
806 RTLIB::POWI_F32, RTLIB::POWI_F64,
807 RTLIB::POWI_F80, RTLIB::POWI_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_FRINT(SDNode *N,
815 SDValue &Lo, SDValue &Hi) {
816 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
817 RTLIB::RINT_F32, RTLIB::RINT_F64,
818 RTLIB::RINT_F80, RTLIB::RINT_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_FSIN(SDNode *N,
826 SDValue &Lo, SDValue &Hi) {
827 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
828 RTLIB::SIN_F32, RTLIB::SIN_F64,
829 RTLIB::SIN_F80, RTLIB::SIN_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_FSQRT(SDNode *N,
837 SDValue &Lo, SDValue &Hi) {
838 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
839 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
840 RTLIB::SQRT_F80, RTLIB::SQRT_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_FSUB(SDNode *N, SDValue &Lo,
849 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
850 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
855 N->getValueType(0), Ops, 2, false);
856 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
857 "Call lowered wrongly!");
858 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
861 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
862 SDValue &Lo, SDValue &Hi) {
863 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
864 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
865 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
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_LOAD(SDNode *N, SDValue &Lo,
874 if (ISD::isNormalLoad(N)) {
875 ExpandRes_NormalLoad(N, Lo, Hi);
879 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
880 LoadSDNode *LD = cast<LoadSDNode>(N);
881 SDValue Chain = LD->getChain();
882 SDValue Ptr = LD->getBasePtr();
884 MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
885 assert(NVT.isByteSized() && "Expanded type not byte sized!");
886 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
888 Lo = DAG.getExtLoad(LD->getExtensionType(), NVT, Chain, Ptr,
889 LD->getSrcValue(), LD->getSrcValueOffset(),
891 LD->isVolatile(), LD->getAlignment());
893 // Remember the chain.
894 Chain = Lo.getValue(1);
896 // The high part is undefined.
897 Hi = DAG.getNode(ISD::UNDEF, NVT);
899 // Modified the chain - switch anything that used the old chain to use the
901 ReplaceValueWith(SDValue(LD, 1), Chain);
904 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
906 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
907 MVT VT = N->getValueType(0);
908 MVT NVT = TLI.getTypeToTransformTo(VT);
909 SDValue Src = N->getOperand(0);
910 MVT SrcVT = Src.getValueType();
912 // First do an SINT_TO_FP, whether the original was signed or unsigned.
913 if (SrcVT.bitsLE(MVT::i32)) {
914 // The integer can be represented exactly in an f64.
915 Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i32, Src);
916 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
917 Hi = DAG.getNode(ISD::SINT_TO_FP, NVT, Src);
919 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
920 if (SrcVT.bitsLE(MVT::i64)) {
921 Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i64, Src);
922 LC = RTLIB::SINTTOFP_I64_PPCF128;
923 } else if (SrcVT.bitsLE(MVT::i128)) {
924 Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i128, Src);
925 LC = RTLIB::SINTTOFP_I128_PPCF128;
927 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
929 Hi = MakeLibCall(LC, VT, &Src, 1, true);
930 assert(Hi.getNode()->getOpcode() == ISD::BUILD_PAIR &&
931 "Call lowered wrongly!");
932 Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
935 if (N->getOpcode() == ISD::SINT_TO_FP)
938 // Unsigned - fix up the SINT_TO_FP value just calculated.
939 Hi = DAG.getNode(ISD::BUILD_PAIR, VT, Lo, Hi);
940 SrcVT = Src.getValueType();
942 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
943 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
944 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
945 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
946 const uint64_t *Parts = 0;
948 switch (SrcVT.getSimpleVT()) {
950 assert(false && "Unsupported UINT_TO_FP!");
959 Lo = DAG.getNode(ISD::FADD, VT, Hi,
960 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
962 Lo = DAG.getNode(ISD::SELECT_CC, VT, Src, DAG.getConstant(0, SrcVT), Lo, Hi,
963 DAG.getCondCode(ISD::SETLT));
964 Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(1));
965 Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(0));
969 //===----------------------------------------------------------------------===//
970 // Float Operand Expansion
971 //===----------------------------------------------------------------------===//
973 /// ExpandFloatOperand - This method is called when the specified operand of the
974 /// specified node is found to need expansion. At this point, all of the result
975 /// types of the node are known to be legal, but other operands of the node may
976 /// need promotion or expansion as well as the specified one.
977 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
978 DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n");
979 SDValue Res = SDValue();
981 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
982 == TargetLowering::Custom)
983 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
985 if (Res.getNode() == 0) {
986 switch (N->getOpcode()) {
989 cerr << "ExpandFloatOperand Op #" << OpNo << ": ";
990 N->dump(&DAG); cerr << "\n";
992 assert(0 && "Do not know how to expand this operator's operand!");
995 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
996 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
997 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
999 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1000 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1001 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1002 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1003 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1004 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1005 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1010 // If the result is null, the sub-method took care of registering results etc.
1011 if (!Res.getNode()) return false;
1012 // If the result is N, the sub-method updated N in place. Check to see if any
1013 // operands are new, and if so, mark them.
1014 if (Res.getNode() == N) {
1015 // Mark N as new and remark N and its operands. This allows us to correctly
1016 // revisit N if it needs another step of expansion and allows us to visit
1017 // any new operands to N.
1022 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1023 "Invalid operand expansion");
1025 ReplaceValueWith(SDValue(N, 0), Res);
1029 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1030 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1031 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1033 ISD::CondCode &CCCode) {
1034 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1035 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1036 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1038 MVT VT = NewLHS.getValueType();
1039 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1041 // FIXME: This generated code sucks. We want to generate
1042 // FCMP crN, hi1, hi2
1044 // FCMP crN, lo1, lo2
1045 // The following can be improved, but not that much.
1046 SDValue Tmp1, Tmp2, Tmp3;
1047 Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETEQ);
1048 Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSLo), LHSLo, RHSLo, CCCode);
1049 Tmp3 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1050 Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETNE);
1051 Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, CCCode);
1052 Tmp1 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1053 NewLHS = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp3);
1054 NewRHS = SDValue(); // LHS is the result, not a compare.
1057 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1058 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1059 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1060 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1062 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1063 // against zero to select between true and false values.
1064 if (NewRHS.getNode() == 0) {
1065 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1066 CCCode = ISD::SETNE;
1069 // Update N to have the operands specified.
1070 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1071 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1075 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1076 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1077 "Logic only correct for ppcf128!");
1079 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1080 // Round it the rest of the way (e.g. to f32) if needed.
1081 return DAG.getNode(ISD::FP_ROUND, N->getValueType(0), Hi, N->getOperand(1));
1084 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1085 MVT RVT = N->getValueType(0);
1087 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1088 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1089 if (RVT == MVT::i32) {
1090 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1091 "Logic only correct for ppcf128!");
1092 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, MVT::ppcf128,
1093 N->getOperand(0), DAG.getValueType(MVT::f64));
1094 Res = DAG.getNode(ISD::FP_ROUND, MVT::f64, Res, DAG.getIntPtrConstant(1));
1095 return DAG.getNode(ISD::FP_TO_SINT, MVT::i32, Res);
1098 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1099 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1100 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false);
1103 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(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 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1112 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1113 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1114 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1115 // FIXME: generated code sucks.
1116 return DAG.getNode(ISD::SELECT_CC, MVT::i32, N->getOperand(0), Tmp,
1117 DAG.getNode(ISD::ADD, MVT::i32,
1118 DAG.getNode(ISD::FP_TO_SINT, MVT::i32,
1119 DAG.getNode(ISD::FSUB,
1123 DAG.getConstant(0x80000000, MVT::i32)),
1124 DAG.getNode(ISD::FP_TO_SINT, MVT::i32, N->getOperand(0)),
1125 DAG.getCondCode(ISD::SETGE));
1128 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1129 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1130 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false);
1133 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1134 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1135 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1136 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1138 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1139 // against zero to select between true and false values.
1140 if (NewRHS.getNode() == 0) {
1141 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1142 CCCode = ISD::SETNE;
1145 // Update N to have the operands specified.
1146 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1147 N->getOperand(2), N->getOperand(3),
1148 DAG.getCondCode(CCCode));
1151 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1152 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1153 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1154 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1156 // If ExpandSetCCOperands returned a scalar, use it.
1157 if (NewRHS.getNode() == 0) {
1158 assert(NewLHS.getValueType() == N->getValueType(0) &&
1159 "Unexpected setcc expansion!");
1163 // Otherwise, update N to have the operands specified.
1164 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1165 DAG.getCondCode(CCCode));
1168 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1169 if (ISD::isNormalStore(N))
1170 return ExpandOp_NormalStore(N, OpNo);
1172 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1173 assert(OpNo == 1 && "Can only expand the stored value so far");
1174 StoreSDNode *ST = cast<StoreSDNode>(N);
1176 SDValue Chain = ST->getChain();
1177 SDValue Ptr = ST->getBasePtr();
1179 MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType());
1180 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1181 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1184 GetExpandedOp(ST->getValue(), Lo, Hi);
1186 return DAG.getTruncStore(Chain, Lo, Ptr,
1187 ST->getSrcValue(), ST->getSrcValueOffset(),
1189 ST->isVolatile(), ST->getAlignment());