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"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/raw_ostream.h"
27 /// GetFPLibCall - Return the right libcall for the given floating point type.
28 static RTLIB::Libcall GetFPLibCall(EVT VT,
29 RTLIB::Libcall Call_F32,
30 RTLIB::Libcall Call_F64,
31 RTLIB::Libcall Call_F80,
32 RTLIB::Libcall Call_PPCF128) {
34 VT == MVT::f32 ? Call_F32 :
35 VT == MVT::f64 ? Call_F64 :
36 VT == MVT::f80 ? Call_F80 :
37 VT == MVT::ppcf128 ? Call_PPCF128 :
38 RTLIB::UNKNOWN_LIBCALL;
41 //===----------------------------------------------------------------------===//
42 // Result Float to Integer Conversion.
43 //===----------------------------------------------------------------------===//
45 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
46 DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
48 SDValue R = SDValue();
50 switch (N->getOpcode()) {
53 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
54 N->dump(&DAG); dbgs() << "\n";
56 llvm_unreachable("Do not know how to soften the result of this operator!");
58 case ISD::BIT_CONVERT: R = SoftenFloatRes_BIT_CONVERT(N); break;
59 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
61 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
63 case ISD::EXTRACT_VECTOR_ELT:
64 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
65 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
66 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
67 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
68 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
69 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
70 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
71 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
72 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
73 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
74 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
75 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
76 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
77 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
78 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
79 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
80 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
81 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
82 case ISD::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(N); break;
83 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
84 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
85 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
86 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
87 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
88 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
89 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
90 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
91 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
92 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
93 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
95 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
96 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
97 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
100 // If R is null, the sub-method took care of registering the result.
102 SetSoftenedFloat(SDValue(N, ResNo), R);
105 SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
106 return BitConvertToInteger(N->getOperand(0));
109 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
110 // Convert the inputs to integers, and build a new pair out of them.
111 return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(),
112 TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)),
113 BitConvertToInteger(N->getOperand(0)),
114 BitConvertToInteger(N->getOperand(1)));
117 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
118 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
119 TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)));
122 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
123 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
124 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
125 NewOp.getValueType().getVectorElementType(),
126 NewOp, N->getOperand(1));
129 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
130 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
131 unsigned Size = NVT.getSizeInBits();
133 // Mask = ~(1 << (Size-1))
134 SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
136 SDValue Op = GetSoftenedFloat(N->getOperand(0));
137 return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
140 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
141 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
142 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
143 GetSoftenedFloat(N->getOperand(1)) };
144 return MakeLibCall(GetFPLibCall(N->getValueType(0),
149 NVT, Ops, 2, false, N->getDebugLoc());
152 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
153 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
154 SDValue Op = GetSoftenedFloat(N->getOperand(0));
155 return MakeLibCall(GetFPLibCall(N->getValueType(0),
159 RTLIB::CEIL_PPCF128),
160 NVT, &Op, 1, false, N->getDebugLoc());
163 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
164 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
165 SDValue RHS = BitConvertToInteger(N->getOperand(1));
166 DebugLoc dl = N->getDebugLoc();
168 EVT LVT = LHS.getValueType();
169 EVT RVT = RHS.getValueType();
171 unsigned LSize = LVT.getSizeInBits();
172 unsigned RSize = RVT.getSizeInBits();
174 // First get the sign bit of second operand.
175 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
176 DAG.getConstant(RSize - 1,
177 TLI.getShiftAmountTy()));
178 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
180 // Shift right or sign-extend it if the two operands have different types.
181 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
183 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
184 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
185 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
186 } else if (SizeDiff < 0) {
187 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
188 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
189 DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
192 // Clear the sign bit of the first operand.
193 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
194 DAG.getConstant(LSize - 1,
195 TLI.getShiftAmountTy()));
196 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
197 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
199 // Or the value with the sign bit.
200 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
203 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
204 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
205 SDValue Op = GetSoftenedFloat(N->getOperand(0));
206 return MakeLibCall(GetFPLibCall(N->getValueType(0),
211 NVT, &Op, 1, false, N->getDebugLoc());
214 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
215 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
216 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
217 GetSoftenedFloat(N->getOperand(1)) };
218 return MakeLibCall(GetFPLibCall(N->getValueType(0),
223 NVT, Ops, 2, false, N->getDebugLoc());
226 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
227 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
228 SDValue Op = GetSoftenedFloat(N->getOperand(0));
229 return MakeLibCall(GetFPLibCall(N->getValueType(0),
234 NVT, &Op, 1, false, N->getDebugLoc());
237 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
238 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
239 SDValue Op = GetSoftenedFloat(N->getOperand(0));
240 return MakeLibCall(GetFPLibCall(N->getValueType(0),
244 RTLIB::EXP2_PPCF128),
245 NVT, &Op, 1, false, N->getDebugLoc());
248 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
249 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
250 SDValue Op = GetSoftenedFloat(N->getOperand(0));
251 return MakeLibCall(GetFPLibCall(N->getValueType(0),
255 RTLIB::FLOOR_PPCF128),
256 NVT, &Op, 1, false, N->getDebugLoc());
259 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
260 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
261 SDValue Op = GetSoftenedFloat(N->getOperand(0));
262 return MakeLibCall(GetFPLibCall(N->getValueType(0),
267 NVT, &Op, 1, false, N->getDebugLoc());
270 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
271 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
272 SDValue Op = GetSoftenedFloat(N->getOperand(0));
273 return MakeLibCall(GetFPLibCall(N->getValueType(0),
277 RTLIB::LOG2_PPCF128),
278 NVT, &Op, 1, false, N->getDebugLoc());
281 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
282 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
283 SDValue Op = GetSoftenedFloat(N->getOperand(0));
284 return MakeLibCall(GetFPLibCall(N->getValueType(0),
288 RTLIB::LOG10_PPCF128),
289 NVT, &Op, 1, false, N->getDebugLoc());
292 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
293 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
294 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
295 GetSoftenedFloat(N->getOperand(1)) };
296 return MakeLibCall(GetFPLibCall(N->getValueType(0),
301 NVT, Ops, 2, false, N->getDebugLoc());
304 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
305 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
306 SDValue Op = GetSoftenedFloat(N->getOperand(0));
307 return MakeLibCall(GetFPLibCall(N->getValueType(0),
308 RTLIB::NEARBYINT_F32,
309 RTLIB::NEARBYINT_F64,
310 RTLIB::NEARBYINT_F80,
311 RTLIB::NEARBYINT_PPCF128),
312 NVT, &Op, 1, false, N->getDebugLoc());
315 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
316 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
317 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
318 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
319 GetSoftenedFloat(N->getOperand(0)) };
320 return MakeLibCall(GetFPLibCall(N->getValueType(0),
325 NVT, Ops, 2, false, N->getDebugLoc());
328 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
329 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
330 SDValue Op = N->getOperand(0);
331 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
332 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
333 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
336 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
338 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
339 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
340 SDValue Op = N->getOperand(0);
341 return MakeLibCall(RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false, N->getDebugLoc());
344 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
345 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
346 SDValue Op = N->getOperand(0);
347 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
348 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
349 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
352 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
353 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
354 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
355 GetSoftenedFloat(N->getOperand(1)) };
356 return MakeLibCall(GetFPLibCall(N->getValueType(0),
361 NVT, Ops, 2, false, N->getDebugLoc());
364 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
365 assert(N->getOperand(1).getValueType() == MVT::i32 &&
366 "Unsupported power type!");
367 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
368 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
369 return MakeLibCall(GetFPLibCall(N->getValueType(0),
373 RTLIB::POWI_PPCF128),
374 NVT, Ops, 2, false, N->getDebugLoc());
377 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
378 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
379 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
380 GetSoftenedFloat(N->getOperand(1)) };
381 return MakeLibCall(GetFPLibCall(N->getValueType(0),
386 NVT, Ops, 2, false, N->getDebugLoc());
389 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
390 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
391 SDValue Op = GetSoftenedFloat(N->getOperand(0));
392 return MakeLibCall(GetFPLibCall(N->getValueType(0),
396 RTLIB::RINT_PPCF128),
397 NVT, &Op, 1, false, N->getDebugLoc());
400 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
401 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
402 SDValue Op = GetSoftenedFloat(N->getOperand(0));
403 return MakeLibCall(GetFPLibCall(N->getValueType(0),
408 NVT, &Op, 1, false, N->getDebugLoc());
411 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
412 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
413 SDValue Op = GetSoftenedFloat(N->getOperand(0));
414 return MakeLibCall(GetFPLibCall(N->getValueType(0),
418 RTLIB::SQRT_PPCF128),
419 NVT, &Op, 1, false, N->getDebugLoc());
422 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
423 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
424 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
425 GetSoftenedFloat(N->getOperand(1)) };
426 return MakeLibCall(GetFPLibCall(N->getValueType(0),
431 NVT, Ops, 2, false, N->getDebugLoc());
434 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
435 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
436 SDValue Op = GetSoftenedFloat(N->getOperand(0));
437 return MakeLibCall(GetFPLibCall(N->getValueType(0),
441 RTLIB::TRUNC_PPCF128),
442 NVT, &Op, 1, false, N->getDebugLoc());
445 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
446 LoadSDNode *L = cast<LoadSDNode>(N);
447 EVT VT = N->getValueType(0);
448 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
449 DebugLoc dl = N->getDebugLoc();
452 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
453 NewL = DAG.getLoad(L->getAddressingMode(), dl, L->getExtensionType(),
454 NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
455 L->getSrcValue(), L->getSrcValueOffset(), NVT,
456 L->isVolatile(), L->isNonTemporal(), L->getAlignment());
457 // Legalized the chain result - switch anything that used the old chain to
459 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
463 // Do a non-extending load followed by FP_EXTEND.
464 NewL = DAG.getLoad(L->getAddressingMode(), dl, ISD::NON_EXTLOAD,
465 L->getMemoryVT(), L->getChain(),
466 L->getBasePtr(), L->getOffset(),
467 L->getSrcValue(), L->getSrcValueOffset(),
468 L->getMemoryVT(), L->isVolatile(),
469 L->isNonTemporal(), L->getAlignment());
470 // Legalized the chain result - switch anything that used the old chain to
472 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
473 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
476 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
477 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
478 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
479 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
480 LHS.getValueType(), N->getOperand(0),LHS,RHS);
483 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
484 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
485 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
486 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
487 LHS.getValueType(), N->getOperand(0),
488 N->getOperand(1), LHS, RHS, N->getOperand(4));
491 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
492 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)));
495 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
496 SDValue Chain = N->getOperand(0); // Get the chain.
497 SDValue Ptr = N->getOperand(1); // Get the pointer.
498 EVT VT = N->getValueType(0);
499 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
500 DebugLoc dl = N->getDebugLoc();
503 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2));
505 // Legalized the chain result - switch anything that used the old chain to
507 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
511 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
512 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
513 EVT SVT = N->getOperand(0).getValueType();
514 EVT RVT = N->getValueType(0);
516 DebugLoc dl = N->getDebugLoc();
518 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
519 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
520 // match. Look for an appropriate libcall.
521 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
522 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
523 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
524 NVT = (MVT::SimpleValueType)t;
525 // The source needs to big enough to hold the operand.
527 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
529 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
531 // Sign/zero extend the argument if the libcall takes a larger type.
532 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
533 NVT, N->getOperand(0));
534 return MakeLibCall(LC, TLI.getTypeToTransformTo(*DAG.getContext(), RVT), &Op, 1, false, dl);
538 //===----------------------------------------------------------------------===//
539 // Operand Float to Integer Conversion..
540 //===----------------------------------------------------------------------===//
542 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
543 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
545 SDValue Res = SDValue();
547 switch (N->getOpcode()) {
550 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
551 N->dump(&DAG); dbgs() << "\n";
553 llvm_unreachable("Do not know how to soften this operator's operand!");
555 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
556 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
557 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
558 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
559 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
560 case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
561 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
562 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
563 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
566 // If the result is null, the sub-method took care of registering results etc.
567 if (!Res.getNode()) return false;
569 // If the result is N, the sub-method updated N in place. Tell the legalizer
571 if (Res.getNode() == N)
574 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
575 "Invalid operand expansion");
577 ReplaceValueWith(SDValue(N, 0), Res);
581 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
582 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
583 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
584 ISD::CondCode &CCCode, DebugLoc dl) {
585 SDValue LHSInt = GetSoftenedFloat(NewLHS);
586 SDValue RHSInt = GetSoftenedFloat(NewRHS);
587 EVT VT = NewLHS.getValueType();
589 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
591 // Expand into one or more soft-fp libcall(s).
592 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
596 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
600 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
604 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
608 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
612 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
616 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
619 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
622 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
625 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
628 // SETONE = SETOLT | SETOGT
629 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
632 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
635 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
638 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
641 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
644 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
646 default: assert(false && "Do not know how to soften this setcc!");
650 // Use the target specific return value for comparions lib calls.
651 EVT RetVT = TLI.getCmpLibcallReturnType();
652 SDValue Ops[2] = { LHSInt, RHSInt };
653 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
654 NewRHS = DAG.getConstant(0, RetVT);
655 CCCode = TLI.getCmpLibcallCC(LC1);
656 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
657 SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
658 NewLHS, NewRHS, DAG.getCondCode(CCCode));
659 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
660 NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
661 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
662 NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
667 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
668 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0),
669 GetSoftenedFloat(N->getOperand(0)));
672 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
673 EVT SVT = N->getOperand(0).getValueType();
674 EVT RVT = N->getValueType(0);
676 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
677 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
679 SDValue Op = GetSoftenedFloat(N->getOperand(0));
680 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
683 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
684 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
685 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
686 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
688 // If SoftenSetCCOperands returned a scalar, we need to compare the result
689 // against zero to select between true and false values.
690 if (NewRHS.getNode() == 0) {
691 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
695 // Update N to have the operands specified.
696 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
697 DAG.getCondCode(CCCode), NewLHS, NewRHS,
701 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
702 EVT RVT = N->getValueType(0);
703 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
704 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
705 SDValue Op = GetSoftenedFloat(N->getOperand(0));
706 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
709 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
710 EVT RVT = N->getValueType(0);
711 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
712 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
713 SDValue Op = GetSoftenedFloat(N->getOperand(0));
714 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
717 SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
718 EVT RVT = N->getValueType(0);
719 RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
720 SDValue Op = GetSoftenedFloat(N->getOperand(0));
721 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
724 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
725 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
726 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
727 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
729 // If SoftenSetCCOperands returned a scalar, we need to compare the result
730 // against zero to select between true and false values.
731 if (NewRHS.getNode() == 0) {
732 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
736 // Update N to have the operands specified.
737 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
738 N->getOperand(2), N->getOperand(3),
739 DAG.getCondCode(CCCode));
742 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
743 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
744 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
745 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
747 // If SoftenSetCCOperands returned a scalar, use it.
748 if (NewRHS.getNode() == 0) {
749 assert(NewLHS.getValueType() == N->getValueType(0) &&
750 "Unexpected setcc expansion!");
754 // Otherwise, update N to have the operands specified.
755 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
756 DAG.getCondCode(CCCode));
759 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
760 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
761 assert(OpNo == 1 && "Can only soften the stored value!");
762 StoreSDNode *ST = cast<StoreSDNode>(N);
763 SDValue Val = ST->getValue();
764 DebugLoc dl = N->getDebugLoc();
766 if (ST->isTruncatingStore())
767 // Do an FP_ROUND followed by a non-truncating store.
768 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
769 Val, DAG.getIntPtrConstant(0)));
771 Val = GetSoftenedFloat(Val);
773 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
774 ST->getSrcValue(), ST->getSrcValueOffset(),
775 ST->isVolatile(), ST->isNonTemporal(),
780 //===----------------------------------------------------------------------===//
781 // Float Result Expansion
782 //===----------------------------------------------------------------------===//
784 /// ExpandFloatResult - This method is called when the specified result of the
785 /// specified node is found to need expansion. At this point, the node may also
786 /// have invalid operands or may have other results that need promotion, we just
787 /// know that (at least) one result needs expansion.
788 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
789 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
793 // See if the target wants to custom expand this node.
794 if (CustomLowerNode(N, N->getValueType(ResNo), true))
797 switch (N->getOpcode()) {
800 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
801 N->dump(&DAG); dbgs() << "\n";
803 llvm_unreachable("Do not know how to expand the result of this operator!");
805 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
806 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
807 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
808 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
810 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
811 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
812 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
813 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
814 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
816 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
817 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
818 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
819 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
820 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
821 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
822 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
823 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
824 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
825 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
826 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
827 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
828 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
829 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
830 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
831 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
832 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
833 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
834 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
835 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
836 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
837 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
838 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
839 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
840 case ISD::SINT_TO_FP:
841 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
844 // If Lo/Hi is null, the sub-method took care of registering results etc.
846 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
849 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
851 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
852 assert(NVT.getSizeInBits() == integerPartWidth &&
853 "Do not know how to expand this float constant!");
854 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
855 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
856 &C.getRawData()[1])), NVT);
857 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
858 &C.getRawData()[0])), NVT);
861 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
863 assert(N->getValueType(0) == MVT::ppcf128 &&
864 "Logic only correct for ppcf128!");
865 DebugLoc dl = N->getDebugLoc();
867 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
868 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
869 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
870 Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
871 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
872 DAG.getCondCode(ISD::SETEQ));
875 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
877 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
878 RTLIB::ADD_F32, RTLIB::ADD_F64,
879 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
881 GetPairElements(Call, Lo, Hi);
884 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
885 SDValue &Lo, SDValue &Hi) {
886 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
887 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
888 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
890 GetPairElements(Call, Lo, Hi);
893 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
894 SDValue &Lo, SDValue &Hi) {
895 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
896 RTLIB::COS_F32, RTLIB::COS_F64,
897 RTLIB::COS_F80, RTLIB::COS_PPCF128),
899 GetPairElements(Call, Lo, Hi);
902 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
904 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
905 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
910 N->getValueType(0), Ops, 2, false,
912 GetPairElements(Call, Lo, Hi);
915 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
916 SDValue &Lo, SDValue &Hi) {
917 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
918 RTLIB::EXP_F32, RTLIB::EXP_F64,
919 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
921 GetPairElements(Call, Lo, Hi);
924 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
925 SDValue &Lo, SDValue &Hi) {
926 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
927 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
928 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
930 GetPairElements(Call, Lo, Hi);
933 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
934 SDValue &Lo, SDValue &Hi) {
935 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
936 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
937 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
939 GetPairElements(Call, Lo, Hi);
942 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
943 SDValue &Lo, SDValue &Hi) {
944 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
945 RTLIB::LOG_F32, RTLIB::LOG_F64,
946 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
948 GetPairElements(Call, Lo, Hi);
951 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
952 SDValue &Lo, SDValue &Hi) {
953 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
954 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
955 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
957 GetPairElements(Call, Lo, Hi);
960 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
961 SDValue &Lo, SDValue &Hi) {
962 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
963 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
964 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
966 GetPairElements(Call, Lo, Hi);
969 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
971 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
972 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
977 N->getValueType(0), Ops, 2, false,
979 GetPairElements(Call, Lo, Hi);
982 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
983 SDValue &Lo, SDValue &Hi) {
984 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
985 RTLIB::NEARBYINT_F32,
986 RTLIB::NEARBYINT_F64,
987 RTLIB::NEARBYINT_F80,
988 RTLIB::NEARBYINT_PPCF128),
990 GetPairElements(Call, Lo, Hi);
993 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
995 DebugLoc dl = N->getDebugLoc();
996 GetExpandedFloat(N->getOperand(0), Lo, Hi);
997 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
998 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1001 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1003 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1004 Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
1005 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1008 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1009 SDValue &Lo, SDValue &Hi) {
1010 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1011 RTLIB::POW_F32, RTLIB::POW_F64,
1012 RTLIB::POW_F80, RTLIB::POW_PPCF128),
1014 GetPairElements(Call, Lo, Hi);
1017 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1018 SDValue &Lo, SDValue &Hi) {
1019 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1020 RTLIB::POWI_F32, RTLIB::POWI_F64,
1021 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1023 GetPairElements(Call, Lo, Hi);
1026 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1027 SDValue &Lo, SDValue &Hi) {
1028 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1029 RTLIB::RINT_F32, RTLIB::RINT_F64,
1030 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1032 GetPairElements(Call, Lo, Hi);
1035 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1036 SDValue &Lo, SDValue &Hi) {
1037 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1038 RTLIB::SIN_F32, RTLIB::SIN_F64,
1039 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1041 GetPairElements(Call, Lo, Hi);
1044 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1045 SDValue &Lo, SDValue &Hi) {
1046 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1047 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1048 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1050 GetPairElements(Call, Lo, Hi);
1053 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1055 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1056 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1060 RTLIB::SUB_PPCF128),
1061 N->getValueType(0), Ops, 2, false,
1063 GetPairElements(Call, Lo, Hi);
1066 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1067 SDValue &Lo, SDValue &Hi) {
1068 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1069 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1070 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1072 GetPairElements(Call, Lo, Hi);
1075 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1077 if (ISD::isNormalLoad(N)) {
1078 ExpandRes_NormalLoad(N, Lo, Hi);
1082 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1083 LoadSDNode *LD = cast<LoadSDNode>(N);
1084 SDValue Chain = LD->getChain();
1085 SDValue Ptr = LD->getBasePtr();
1086 DebugLoc dl = N->getDebugLoc();
1088 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1089 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1090 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1092 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1093 LD->getSrcValue(), LD->getSrcValueOffset(),
1094 LD->getMemoryVT(), LD->isVolatile(),
1095 LD->isNonTemporal(), LD->getAlignment());
1097 // Remember the chain.
1098 Chain = Hi.getValue(1);
1100 // The low part is zero.
1101 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1103 // Modified the chain - switch anything that used the old chain to use the
1105 ReplaceValueWith(SDValue(LD, 1), Chain);
1108 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1110 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1111 EVT VT = N->getValueType(0);
1112 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1113 SDValue Src = N->getOperand(0);
1114 EVT SrcVT = Src.getValueType();
1115 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1116 DebugLoc dl = N->getDebugLoc();
1118 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1119 // When promoting partial word types to i32 we must honor the signedness,
1121 if (SrcVT.bitsLE(MVT::i32)) {
1122 // The integer can be represented exactly in an f64.
1123 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1125 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1126 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1128 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1129 if (SrcVT.bitsLE(MVT::i64)) {
1130 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1132 LC = RTLIB::SINTTOFP_I64_PPCF128;
1133 } else if (SrcVT.bitsLE(MVT::i128)) {
1134 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1135 LC = RTLIB::SINTTOFP_I128_PPCF128;
1137 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1139 Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1140 GetPairElements(Hi, Lo, Hi);
1146 // Unsigned - fix up the SINT_TO_FP value just calculated.
1147 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1148 SrcVT = Src.getValueType();
1150 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1151 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1152 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1153 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1154 const uint64_t *Parts = 0;
1156 switch (SrcVT.getSimpleVT().SimpleTy) {
1158 assert(false && "Unsupported UINT_TO_FP!");
1170 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1171 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1173 Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1174 Lo, Hi, DAG.getCondCode(ISD::SETLT));
1175 GetPairElements(Lo, Lo, Hi);
1179 //===----------------------------------------------------------------------===//
1180 // Float Operand Expansion
1181 //===----------------------------------------------------------------------===//
1183 /// ExpandFloatOperand - This method is called when the specified operand of the
1184 /// specified node is found to need expansion. At this point, all of the result
1185 /// types of the node are known to be legal, but other operands of the node may
1186 /// need promotion or expansion as well as the specified one.
1187 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1188 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1189 SDValue Res = SDValue();
1191 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1192 == TargetLowering::Custom)
1193 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1195 if (Res.getNode() == 0) {
1196 switch (N->getOpcode()) {
1199 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1200 N->dump(&DAG); dbgs() << "\n";
1202 llvm_unreachable("Do not know how to expand this operator's operand!");
1204 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1205 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1206 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1208 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1209 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1210 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1211 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1212 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1213 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1214 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1219 // If the result is null, the sub-method took care of registering results etc.
1220 if (!Res.getNode()) return false;
1222 // If the result is N, the sub-method updated N in place. Tell the legalizer
1224 if (Res.getNode() == N)
1227 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1228 "Invalid operand expansion");
1230 ReplaceValueWith(SDValue(N, 0), Res);
1234 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1235 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1236 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1238 ISD::CondCode &CCCode,
1240 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1241 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1242 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1244 EVT VT = NewLHS.getValueType();
1245 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1247 // FIXME: This generated code sucks. We want to generate
1248 // FCMPU crN, hi1, hi2
1250 // FCMPU crN, lo1, lo2
1251 // The following can be improved, but not that much.
1252 SDValue Tmp1, Tmp2, Tmp3;
1253 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1254 LHSHi, RHSHi, ISD::SETOEQ);
1255 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1256 LHSLo, RHSLo, CCCode);
1257 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1258 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1259 LHSHi, RHSHi, ISD::SETUNE);
1260 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1261 LHSHi, RHSHi, CCCode);
1262 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1263 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1264 NewRHS = SDValue(); // LHS is the result, not a compare.
1267 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1268 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1269 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1270 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1272 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1273 // against zero to select between true and false values.
1274 if (NewRHS.getNode() == 0) {
1275 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1276 CCCode = ISD::SETNE;
1279 // Update N to have the operands specified.
1280 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1281 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1285 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1286 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1287 "Logic only correct for ppcf128!");
1289 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1290 // Round it the rest of the way (e.g. to f32) if needed.
1291 return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1292 N->getValueType(0), Hi, N->getOperand(1));
1295 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1296 EVT RVT = N->getValueType(0);
1297 DebugLoc dl = N->getDebugLoc();
1299 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1300 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1301 if (RVT == MVT::i32) {
1302 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1303 "Logic only correct for ppcf128!");
1304 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1305 N->getOperand(0), DAG.getValueType(MVT::f64));
1306 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1307 DAG.getIntPtrConstant(1));
1308 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1311 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1312 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1313 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1316 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1317 EVT RVT = N->getValueType(0);
1318 DebugLoc dl = N->getDebugLoc();
1320 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1321 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1322 if (RVT == MVT::i32) {
1323 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1324 "Logic only correct for ppcf128!");
1325 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1326 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1327 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1328 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1329 // FIXME: generated code sucks.
1330 return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1331 DAG.getNode(ISD::ADD, dl, MVT::i32,
1332 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1333 DAG.getNode(ISD::FSUB, dl,
1337 DAG.getConstant(0x80000000, MVT::i32)),
1338 DAG.getNode(ISD::FP_TO_SINT, dl,
1339 MVT::i32, N->getOperand(0)),
1340 DAG.getCondCode(ISD::SETGE));
1343 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1344 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1345 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1348 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1349 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1350 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1351 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1353 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1354 // against zero to select between true and false values.
1355 if (NewRHS.getNode() == 0) {
1356 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1357 CCCode = ISD::SETNE;
1360 // Update N to have the operands specified.
1361 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1362 N->getOperand(2), N->getOperand(3),
1363 DAG.getCondCode(CCCode));
1366 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1367 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1368 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1369 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1371 // If ExpandSetCCOperands returned a scalar, use it.
1372 if (NewRHS.getNode() == 0) {
1373 assert(NewLHS.getValueType() == N->getValueType(0) &&
1374 "Unexpected setcc expansion!");
1378 // Otherwise, update N to have the operands specified.
1379 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1380 DAG.getCondCode(CCCode));
1383 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1384 if (ISD::isNormalStore(N))
1385 return ExpandOp_NormalStore(N, OpNo);
1387 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1388 assert(OpNo == 1 && "Can only expand the stored value so far");
1389 StoreSDNode *ST = cast<StoreSDNode>(N);
1391 SDValue Chain = ST->getChain();
1392 SDValue Ptr = ST->getBasePtr();
1394 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), ST->getValue().getValueType());
1395 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1396 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1399 GetExpandedOp(ST->getValue(), Lo, Hi);
1401 return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1402 ST->getSrcValue(), ST->getSrcValueOffset(),
1403 ST->getMemoryVT(), ST->isVolatile(),
1404 ST->isNonTemporal(), ST->getAlignment());