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::FPOW: R = SoftenFloatRes_FPOW(N); break;
83 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
84 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
85 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
86 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
87 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
88 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
89 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
90 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
91 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
92 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
94 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
95 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
96 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
99 // If R is null, the sub-method took care of registering the result.
101 SetSoftenedFloat(SDValue(N, ResNo), R);
104 SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
105 return BitConvertToInteger(N->getOperand(0));
108 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
109 // Convert the inputs to integers, and build a new pair out of them.
110 return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(),
111 TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)),
112 BitConvertToInteger(N->getOperand(0)),
113 BitConvertToInteger(N->getOperand(1)));
116 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
117 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
118 TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)));
121 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
122 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
123 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
124 NewOp.getValueType().getVectorElementType(),
125 NewOp, N->getOperand(1));
128 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
129 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
130 unsigned Size = NVT.getSizeInBits();
132 // Mask = ~(1 << (Size-1))
133 SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
135 SDValue Op = GetSoftenedFloat(N->getOperand(0));
136 return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
139 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
140 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
141 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
142 GetSoftenedFloat(N->getOperand(1)) };
143 return MakeLibCall(GetFPLibCall(N->getValueType(0),
148 NVT, Ops, 2, false, N->getDebugLoc());
151 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
152 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
153 SDValue Op = GetSoftenedFloat(N->getOperand(0));
154 return MakeLibCall(GetFPLibCall(N->getValueType(0),
158 RTLIB::CEIL_PPCF128),
159 NVT, &Op, 1, false, N->getDebugLoc());
162 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
163 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
164 SDValue RHS = BitConvertToInteger(N->getOperand(1));
165 DebugLoc dl = N->getDebugLoc();
167 EVT LVT = LHS.getValueType();
168 EVT RVT = RHS.getValueType();
170 unsigned LSize = LVT.getSizeInBits();
171 unsigned RSize = RVT.getSizeInBits();
173 // First get the sign bit of second operand.
174 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
175 DAG.getConstant(RSize - 1,
176 TLI.getShiftAmountTy()));
177 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
179 // Shift right or sign-extend it if the two operands have different types.
180 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
182 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
183 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
184 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
185 } else if (SizeDiff < 0) {
186 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
187 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
188 DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
191 // Clear the sign bit of the first operand.
192 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
193 DAG.getConstant(LSize - 1,
194 TLI.getShiftAmountTy()));
195 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
196 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
198 // Or the value with the sign bit.
199 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
202 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
203 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
204 SDValue Op = GetSoftenedFloat(N->getOperand(0));
205 return MakeLibCall(GetFPLibCall(N->getValueType(0),
210 NVT, &Op, 1, false, N->getDebugLoc());
213 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
214 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
215 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
216 GetSoftenedFloat(N->getOperand(1)) };
217 return MakeLibCall(GetFPLibCall(N->getValueType(0),
222 NVT, Ops, 2, false, N->getDebugLoc());
225 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
226 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
227 SDValue Op = GetSoftenedFloat(N->getOperand(0));
228 return MakeLibCall(GetFPLibCall(N->getValueType(0),
233 NVT, &Op, 1, false, N->getDebugLoc());
236 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
237 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
238 SDValue Op = GetSoftenedFloat(N->getOperand(0));
239 return MakeLibCall(GetFPLibCall(N->getValueType(0),
243 RTLIB::EXP2_PPCF128),
244 NVT, &Op, 1, false, N->getDebugLoc());
247 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
248 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
249 SDValue Op = GetSoftenedFloat(N->getOperand(0));
250 return MakeLibCall(GetFPLibCall(N->getValueType(0),
254 RTLIB::FLOOR_PPCF128),
255 NVT, &Op, 1, false, N->getDebugLoc());
258 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
259 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
260 SDValue Op = GetSoftenedFloat(N->getOperand(0));
261 return MakeLibCall(GetFPLibCall(N->getValueType(0),
266 NVT, &Op, 1, false, N->getDebugLoc());
269 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
270 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
271 SDValue Op = GetSoftenedFloat(N->getOperand(0));
272 return MakeLibCall(GetFPLibCall(N->getValueType(0),
276 RTLIB::LOG2_PPCF128),
277 NVT, &Op, 1, false, N->getDebugLoc());
280 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
281 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
282 SDValue Op = GetSoftenedFloat(N->getOperand(0));
283 return MakeLibCall(GetFPLibCall(N->getValueType(0),
287 RTLIB::LOG10_PPCF128),
288 NVT, &Op, 1, false, N->getDebugLoc());
291 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
292 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
293 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
294 GetSoftenedFloat(N->getOperand(1)) };
295 return MakeLibCall(GetFPLibCall(N->getValueType(0),
300 NVT, Ops, 2, false, N->getDebugLoc());
303 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
304 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
305 SDValue Op = GetSoftenedFloat(N->getOperand(0));
306 return MakeLibCall(GetFPLibCall(N->getValueType(0),
307 RTLIB::NEARBYINT_F32,
308 RTLIB::NEARBYINT_F64,
309 RTLIB::NEARBYINT_F80,
310 RTLIB::NEARBYINT_PPCF128),
311 NVT, &Op, 1, false, N->getDebugLoc());
314 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
315 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
316 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
317 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
318 GetSoftenedFloat(N->getOperand(0)) };
319 return MakeLibCall(GetFPLibCall(N->getValueType(0),
324 NVT, Ops, 2, false, N->getDebugLoc());
327 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
328 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
329 SDValue Op = N->getOperand(0);
330 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
331 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
332 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
335 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
336 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
337 SDValue Op = N->getOperand(0);
338 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
339 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
340 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
343 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
344 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
345 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
346 GetSoftenedFloat(N->getOperand(1)) };
347 return MakeLibCall(GetFPLibCall(N->getValueType(0),
352 NVT, Ops, 2, false, N->getDebugLoc());
355 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
356 assert(N->getOperand(1).getValueType() == MVT::i32 &&
357 "Unsupported power type!");
358 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
359 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
360 return MakeLibCall(GetFPLibCall(N->getValueType(0),
364 RTLIB::POWI_PPCF128),
365 NVT, Ops, 2, false, N->getDebugLoc());
368 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
369 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
370 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
371 GetSoftenedFloat(N->getOperand(1)) };
372 return MakeLibCall(GetFPLibCall(N->getValueType(0),
377 NVT, Ops, 2, false, N->getDebugLoc());
380 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
381 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
382 SDValue Op = GetSoftenedFloat(N->getOperand(0));
383 return MakeLibCall(GetFPLibCall(N->getValueType(0),
387 RTLIB::RINT_PPCF128),
388 NVT, &Op, 1, false, N->getDebugLoc());
391 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
392 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
393 SDValue Op = GetSoftenedFloat(N->getOperand(0));
394 return MakeLibCall(GetFPLibCall(N->getValueType(0),
399 NVT, &Op, 1, false, N->getDebugLoc());
402 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
403 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
404 SDValue Op = GetSoftenedFloat(N->getOperand(0));
405 return MakeLibCall(GetFPLibCall(N->getValueType(0),
409 RTLIB::SQRT_PPCF128),
410 NVT, &Op, 1, false, N->getDebugLoc());
413 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
414 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
415 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
416 GetSoftenedFloat(N->getOperand(1)) };
417 return MakeLibCall(GetFPLibCall(N->getValueType(0),
422 NVT, Ops, 2, false, N->getDebugLoc());
425 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
426 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
427 SDValue Op = GetSoftenedFloat(N->getOperand(0));
428 return MakeLibCall(GetFPLibCall(N->getValueType(0),
432 RTLIB::TRUNC_PPCF128),
433 NVT, &Op, 1, false, N->getDebugLoc());
436 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
437 LoadSDNode *L = cast<LoadSDNode>(N);
438 EVT VT = N->getValueType(0);
439 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
440 DebugLoc dl = N->getDebugLoc();
443 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
444 NewL = DAG.getLoad(L->getAddressingMode(), dl, L->getExtensionType(),
445 NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
446 L->getSrcValue(), L->getSrcValueOffset(), NVT,
447 L->isVolatile(), L->isNonTemporal(), L->getAlignment());
448 // Legalized the chain result - switch anything that used the old chain to
450 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
454 // Do a non-extending load followed by FP_EXTEND.
455 NewL = DAG.getLoad(L->getAddressingMode(), dl, ISD::NON_EXTLOAD,
456 L->getMemoryVT(), L->getChain(),
457 L->getBasePtr(), L->getOffset(),
458 L->getSrcValue(), L->getSrcValueOffset(),
459 L->getMemoryVT(), L->isVolatile(),
460 L->isNonTemporal(), L->getAlignment());
461 // Legalized the chain result - switch anything that used the old chain to
463 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
464 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
467 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
468 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
469 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
470 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
471 LHS.getValueType(), N->getOperand(0),LHS,RHS);
474 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
475 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
476 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
477 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
478 LHS.getValueType(), N->getOperand(0),
479 N->getOperand(1), LHS, RHS, N->getOperand(4));
482 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
483 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0)));
486 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
487 SDValue Chain = N->getOperand(0); // Get the chain.
488 SDValue Ptr = N->getOperand(1); // Get the pointer.
489 EVT VT = N->getValueType(0);
490 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
491 DebugLoc dl = N->getDebugLoc();
494 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2));
496 // Legalized the chain result - switch anything that used the old chain to
498 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
502 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
503 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
504 EVT SVT = N->getOperand(0).getValueType();
505 EVT RVT = N->getValueType(0);
507 DebugLoc dl = N->getDebugLoc();
509 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
510 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
511 // match. Look for an appropriate libcall.
512 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
513 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
514 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
515 NVT = (MVT::SimpleValueType)t;
516 // The source needs to big enough to hold the operand.
518 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
520 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
522 // Sign/zero extend the argument if the libcall takes a larger type.
523 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
524 NVT, N->getOperand(0));
525 return MakeLibCall(LC, TLI.getTypeToTransformTo(*DAG.getContext(), RVT), &Op, 1, false, dl);
529 //===----------------------------------------------------------------------===//
530 // Operand Float to Integer Conversion..
531 //===----------------------------------------------------------------------===//
533 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
534 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
536 SDValue Res = SDValue();
538 switch (N->getOpcode()) {
541 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
542 N->dump(&DAG); dbgs() << "\n";
544 llvm_unreachable("Do not know how to soften this operator's operand!");
546 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
547 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
548 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
549 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
550 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
551 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
552 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
553 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
556 // If the result is null, the sub-method took care of registering results etc.
557 if (!Res.getNode()) return false;
559 // If the result is N, the sub-method updated N in place. Tell the legalizer
561 if (Res.getNode() == N)
564 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
565 "Invalid operand expansion");
567 ReplaceValueWith(SDValue(N, 0), Res);
571 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
572 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
573 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
574 ISD::CondCode &CCCode, DebugLoc dl) {
575 SDValue LHSInt = GetSoftenedFloat(NewLHS);
576 SDValue RHSInt = GetSoftenedFloat(NewRHS);
577 EVT VT = NewLHS.getValueType();
579 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
581 // Expand into one or more soft-fp libcall(s).
582 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
586 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
590 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
594 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
598 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
602 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
606 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
609 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
612 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
615 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
618 // SETONE = SETOLT | SETOGT
619 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
622 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
625 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
628 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
631 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
634 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
636 default: assert(false && "Do not know how to soften this setcc!");
640 // Use the target specific return value for comparions lib calls.
641 EVT RetVT = TLI.getCmpLibcallReturnType();
642 SDValue Ops[2] = { LHSInt, RHSInt };
643 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
644 NewRHS = DAG.getConstant(0, RetVT);
645 CCCode = TLI.getCmpLibcallCC(LC1);
646 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
647 SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
648 NewLHS, NewRHS, DAG.getCondCode(CCCode));
649 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
650 NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
651 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
652 NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
657 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
658 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0),
659 GetSoftenedFloat(N->getOperand(0)));
662 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
663 EVT SVT = N->getOperand(0).getValueType();
664 EVT RVT = N->getValueType(0);
666 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
667 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
669 SDValue Op = GetSoftenedFloat(N->getOperand(0));
670 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
673 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
674 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
675 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
676 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
678 // If SoftenSetCCOperands returned a scalar, we need to compare the result
679 // against zero to select between true and false values.
680 if (NewRHS.getNode() == 0) {
681 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
685 // Update N to have the operands specified.
686 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
687 DAG.getCondCode(CCCode), NewLHS, NewRHS,
691 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
692 EVT RVT = N->getValueType(0);
693 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
694 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
695 SDValue Op = GetSoftenedFloat(N->getOperand(0));
696 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
699 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
700 EVT RVT = N->getValueType(0);
701 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
702 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
703 SDValue Op = GetSoftenedFloat(N->getOperand(0));
704 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
707 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
708 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
709 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
710 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
712 // If SoftenSetCCOperands returned a scalar, we need to compare the result
713 // against zero to select between true and false values.
714 if (NewRHS.getNode() == 0) {
715 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
719 // Update N to have the operands specified.
720 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
721 N->getOperand(2), N->getOperand(3),
722 DAG.getCondCode(CCCode));
725 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
726 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
727 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
728 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
730 // If SoftenSetCCOperands returned a scalar, use it.
731 if (NewRHS.getNode() == 0) {
732 assert(NewLHS.getValueType() == N->getValueType(0) &&
733 "Unexpected setcc expansion!");
737 // Otherwise, update N to have the operands specified.
738 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
739 DAG.getCondCode(CCCode));
742 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
743 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
744 assert(OpNo == 1 && "Can only soften the stored value!");
745 StoreSDNode *ST = cast<StoreSDNode>(N);
746 SDValue Val = ST->getValue();
747 DebugLoc dl = N->getDebugLoc();
749 if (ST->isTruncatingStore())
750 // Do an FP_ROUND followed by a non-truncating store.
751 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
752 Val, DAG.getIntPtrConstant(0)));
754 Val = GetSoftenedFloat(Val);
756 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
757 ST->getSrcValue(), ST->getSrcValueOffset(),
758 ST->isVolatile(), ST->isNonTemporal(),
763 //===----------------------------------------------------------------------===//
764 // Float Result Expansion
765 //===----------------------------------------------------------------------===//
767 /// ExpandFloatResult - This method is called when the specified result of the
768 /// specified node is found to need expansion. At this point, the node may also
769 /// have invalid operands or may have other results that need promotion, we just
770 /// know that (at least) one result needs expansion.
771 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
772 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
776 // See if the target wants to custom expand this node.
777 if (CustomLowerNode(N, N->getValueType(ResNo), true))
780 switch (N->getOpcode()) {
783 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
784 N->dump(&DAG); dbgs() << "\n";
786 llvm_unreachable("Do not know how to expand the result of this operator!");
788 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
789 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
790 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
791 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
793 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
794 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
795 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
796 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
797 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
799 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
800 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
801 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
802 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
803 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
804 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
805 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
806 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
807 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
808 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
809 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
810 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
811 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
812 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
813 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
814 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
815 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
816 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
817 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
818 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
819 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
820 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
821 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
822 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
823 case ISD::SINT_TO_FP:
824 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
827 // If Lo/Hi is null, the sub-method took care of registering results etc.
829 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
832 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
834 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
835 assert(NVT.getSizeInBits() == integerPartWidth &&
836 "Do not know how to expand this float constant!");
837 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
838 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
839 &C.getRawData()[1])), NVT);
840 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
841 &C.getRawData()[0])), NVT);
844 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
846 assert(N->getValueType(0) == MVT::ppcf128 &&
847 "Logic only correct for ppcf128!");
848 DebugLoc dl = N->getDebugLoc();
850 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
851 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
852 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
853 Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
854 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
855 DAG.getCondCode(ISD::SETEQ));
858 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
860 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
861 RTLIB::ADD_F32, RTLIB::ADD_F64,
862 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
864 GetPairElements(Call, Lo, Hi);
867 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
868 SDValue &Lo, SDValue &Hi) {
869 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
870 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
871 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
873 GetPairElements(Call, Lo, Hi);
876 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
877 SDValue &Lo, SDValue &Hi) {
878 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
879 RTLIB::COS_F32, RTLIB::COS_F64,
880 RTLIB::COS_F80, RTLIB::COS_PPCF128),
882 GetPairElements(Call, Lo, Hi);
885 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
887 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
888 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
893 N->getValueType(0), Ops, 2, false,
895 GetPairElements(Call, Lo, Hi);
898 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
899 SDValue &Lo, SDValue &Hi) {
900 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
901 RTLIB::EXP_F32, RTLIB::EXP_F64,
902 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
904 GetPairElements(Call, Lo, Hi);
907 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
908 SDValue &Lo, SDValue &Hi) {
909 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
910 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
911 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
913 GetPairElements(Call, Lo, Hi);
916 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
917 SDValue &Lo, SDValue &Hi) {
918 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
919 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
920 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
922 GetPairElements(Call, Lo, Hi);
925 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
926 SDValue &Lo, SDValue &Hi) {
927 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
928 RTLIB::LOG_F32, RTLIB::LOG_F64,
929 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
931 GetPairElements(Call, Lo, Hi);
934 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
935 SDValue &Lo, SDValue &Hi) {
936 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
937 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
938 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
940 GetPairElements(Call, Lo, Hi);
943 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
944 SDValue &Lo, SDValue &Hi) {
945 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
946 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
947 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
949 GetPairElements(Call, Lo, Hi);
952 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
954 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
955 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
960 N->getValueType(0), Ops, 2, false,
962 GetPairElements(Call, Lo, Hi);
965 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
966 SDValue &Lo, SDValue &Hi) {
967 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
968 RTLIB::NEARBYINT_F32,
969 RTLIB::NEARBYINT_F64,
970 RTLIB::NEARBYINT_F80,
971 RTLIB::NEARBYINT_PPCF128),
973 GetPairElements(Call, Lo, Hi);
976 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
978 DebugLoc dl = N->getDebugLoc();
979 GetExpandedFloat(N->getOperand(0), Lo, Hi);
980 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
981 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
984 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
986 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
987 Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
988 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
991 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
992 SDValue &Lo, SDValue &Hi) {
993 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
994 RTLIB::POW_F32, RTLIB::POW_F64,
995 RTLIB::POW_F80, RTLIB::POW_PPCF128),
997 GetPairElements(Call, Lo, Hi);
1000 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1001 SDValue &Lo, SDValue &Hi) {
1002 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1003 RTLIB::POWI_F32, RTLIB::POWI_F64,
1004 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1006 GetPairElements(Call, Lo, Hi);
1009 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1010 SDValue &Lo, SDValue &Hi) {
1011 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1012 RTLIB::RINT_F32, RTLIB::RINT_F64,
1013 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1015 GetPairElements(Call, Lo, Hi);
1018 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1019 SDValue &Lo, SDValue &Hi) {
1020 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1021 RTLIB::SIN_F32, RTLIB::SIN_F64,
1022 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1024 GetPairElements(Call, Lo, Hi);
1027 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1028 SDValue &Lo, SDValue &Hi) {
1029 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1030 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1031 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1033 GetPairElements(Call, Lo, Hi);
1036 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1038 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1039 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1043 RTLIB::SUB_PPCF128),
1044 N->getValueType(0), Ops, 2, false,
1046 GetPairElements(Call, Lo, Hi);
1049 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1050 SDValue &Lo, SDValue &Hi) {
1051 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1052 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1053 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1055 GetPairElements(Call, Lo, Hi);
1058 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1060 if (ISD::isNormalLoad(N)) {
1061 ExpandRes_NormalLoad(N, Lo, Hi);
1065 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1066 LoadSDNode *LD = cast<LoadSDNode>(N);
1067 SDValue Chain = LD->getChain();
1068 SDValue Ptr = LD->getBasePtr();
1069 DebugLoc dl = N->getDebugLoc();
1071 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1072 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1073 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1075 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1076 LD->getSrcValue(), LD->getSrcValueOffset(),
1077 LD->getMemoryVT(), LD->isVolatile(),
1078 LD->isNonTemporal(), LD->getAlignment());
1080 // Remember the chain.
1081 Chain = Hi.getValue(1);
1083 // The low part is zero.
1084 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1086 // Modified the chain - switch anything that used the old chain to use the
1088 ReplaceValueWith(SDValue(LD, 1), Chain);
1091 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1093 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1094 EVT VT = N->getValueType(0);
1095 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1096 SDValue Src = N->getOperand(0);
1097 EVT SrcVT = Src.getValueType();
1098 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1099 DebugLoc dl = N->getDebugLoc();
1101 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1102 // When promoting partial word types to i32 we must honor the signedness,
1104 if (SrcVT.bitsLE(MVT::i32)) {
1105 // The integer can be represented exactly in an f64.
1106 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1108 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1109 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1111 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1112 if (SrcVT.bitsLE(MVT::i64)) {
1113 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1115 LC = RTLIB::SINTTOFP_I64_PPCF128;
1116 } else if (SrcVT.bitsLE(MVT::i128)) {
1117 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1118 LC = RTLIB::SINTTOFP_I128_PPCF128;
1120 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1122 Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1123 GetPairElements(Hi, Lo, Hi);
1129 // Unsigned - fix up the SINT_TO_FP value just calculated.
1130 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1131 SrcVT = Src.getValueType();
1133 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1134 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1135 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1136 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1137 const uint64_t *Parts = 0;
1139 switch (SrcVT.getSimpleVT().SimpleTy) {
1141 assert(false && "Unsupported UINT_TO_FP!");
1153 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1154 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1156 Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1157 Lo, Hi, DAG.getCondCode(ISD::SETLT));
1158 GetPairElements(Lo, Lo, Hi);
1162 //===----------------------------------------------------------------------===//
1163 // Float Operand Expansion
1164 //===----------------------------------------------------------------------===//
1166 /// ExpandFloatOperand - This method is called when the specified operand of the
1167 /// specified node is found to need expansion. At this point, all of the result
1168 /// types of the node are known to be legal, but other operands of the node may
1169 /// need promotion or expansion as well as the specified one.
1170 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1171 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1172 SDValue Res = SDValue();
1174 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1175 == TargetLowering::Custom)
1176 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1178 if (Res.getNode() == 0) {
1179 switch (N->getOpcode()) {
1182 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1183 N->dump(&DAG); dbgs() << "\n";
1185 llvm_unreachable("Do not know how to expand this operator's operand!");
1187 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1188 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1189 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1191 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1192 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1193 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1194 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1195 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1196 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1197 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1202 // If the result is null, the sub-method took care of registering results etc.
1203 if (!Res.getNode()) return false;
1205 // If the result is N, the sub-method updated N in place. Tell the legalizer
1207 if (Res.getNode() == N)
1210 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1211 "Invalid operand expansion");
1213 ReplaceValueWith(SDValue(N, 0), Res);
1217 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1218 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1219 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1221 ISD::CondCode &CCCode,
1223 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1224 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1225 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1227 EVT VT = NewLHS.getValueType();
1228 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1230 // FIXME: This generated code sucks. We want to generate
1231 // FCMPU crN, hi1, hi2
1233 // FCMPU crN, lo1, lo2
1234 // The following can be improved, but not that much.
1235 SDValue Tmp1, Tmp2, Tmp3;
1236 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1237 LHSHi, RHSHi, ISD::SETOEQ);
1238 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1239 LHSLo, RHSLo, CCCode);
1240 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1241 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1242 LHSHi, RHSHi, ISD::SETUNE);
1243 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1244 LHSHi, RHSHi, CCCode);
1245 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1246 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1247 NewRHS = SDValue(); // LHS is the result, not a compare.
1250 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1251 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1252 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1253 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1255 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1256 // against zero to select between true and false values.
1257 if (NewRHS.getNode() == 0) {
1258 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1259 CCCode = ISD::SETNE;
1262 // Update N to have the operands specified.
1263 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1264 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1268 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1269 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1270 "Logic only correct for ppcf128!");
1272 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1273 // Round it the rest of the way (e.g. to f32) if needed.
1274 return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1275 N->getValueType(0), Hi, N->getOperand(1));
1278 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1279 EVT RVT = N->getValueType(0);
1280 DebugLoc dl = N->getDebugLoc();
1282 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1283 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1284 if (RVT == MVT::i32) {
1285 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1286 "Logic only correct for ppcf128!");
1287 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1288 N->getOperand(0), DAG.getValueType(MVT::f64));
1289 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1290 DAG.getIntPtrConstant(1));
1291 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1294 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1295 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1296 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1299 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1300 EVT RVT = N->getValueType(0);
1301 DebugLoc dl = N->getDebugLoc();
1303 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1304 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1305 if (RVT == MVT::i32) {
1306 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1307 "Logic only correct for ppcf128!");
1308 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1309 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1310 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1311 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1312 // FIXME: generated code sucks.
1313 return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1314 DAG.getNode(ISD::ADD, dl, MVT::i32,
1315 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1316 DAG.getNode(ISD::FSUB, dl,
1320 DAG.getConstant(0x80000000, MVT::i32)),
1321 DAG.getNode(ISD::FP_TO_SINT, dl,
1322 MVT::i32, N->getOperand(0)),
1323 DAG.getCondCode(ISD::SETGE));
1326 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1327 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1328 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1331 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1332 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1333 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1334 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1336 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1337 // against zero to select between true and false values.
1338 if (NewRHS.getNode() == 0) {
1339 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1340 CCCode = ISD::SETNE;
1343 // Update N to have the operands specified.
1344 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1345 N->getOperand(2), N->getOperand(3),
1346 DAG.getCondCode(CCCode));
1349 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1350 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1351 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1352 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1354 // If ExpandSetCCOperands returned a scalar, use it.
1355 if (NewRHS.getNode() == 0) {
1356 assert(NewLHS.getValueType() == N->getValueType(0) &&
1357 "Unexpected setcc expansion!");
1361 // Otherwise, update N to have the operands specified.
1362 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1363 DAG.getCondCode(CCCode));
1366 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1367 if (ISD::isNormalStore(N))
1368 return ExpandOp_NormalStore(N, OpNo);
1370 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1371 assert(OpNo == 1 && "Can only expand the stored value so far");
1372 StoreSDNode *ST = cast<StoreSDNode>(N);
1374 SDValue Chain = ST->getChain();
1375 SDValue Ptr = ST->getBasePtr();
1377 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), ST->getValue().getValueType());
1378 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1379 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1382 GetExpandedOp(ST->getValue(), Lo, Hi);
1384 return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1385 ST->getSrcValue(), ST->getSrcValueOffset(),
1386 ST->getMemoryVT(), ST->isVolatile(),
1387 ST->isNonTemporal(), ST->getAlignment());