LegalizeFloatTypes.cpp revision 7fed65a68d961eef21d4572beab64d047ece5a3e 
1//===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
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.
19//
20//===----------------------------------------------------------------------===//
21
22#include "LegalizeTypes.h"
23using namespace llvm;
24
25/// GetFPLibCall - Return the right libcall for the given floating point type.
26static RTLIB::Libcall GetFPLibCall(MVT VT,
27                                   RTLIB::Libcall Call_F32,
28                                   RTLIB::Libcall Call_F64,
29                                   RTLIB::Libcall Call_F80,
30                                   RTLIB::Libcall Call_PPCF128) {
31  return
32    VT == MVT::f32 ? Call_F32 :
33    VT == MVT::f64 ? Call_F64 :
34    VT == MVT::f80 ? Call_F80 :
35    VT == MVT::ppcf128 ? Call_PPCF128 :
36    RTLIB::UNKNOWN_LIBCALL;
37}
38
39//===----------------------------------------------------------------------===//
40//  Result Float to Integer Conversion.
41//===----------------------------------------------------------------------===//
42
43void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
44  DEBUG(cerr << "Soften float result " << ResNo << ": "; N->dump(&DAG);
45        cerr << "\n");
46  SDValue R = SDValue();
47
48  switch (N->getOpcode()) {
49  default:
50#ifndef NDEBUG
51    cerr << "SoftenFloatResult #" << ResNo << ": ";
52    N->dump(&DAG); cerr << "\n";
53#endif
54    assert(0 && "Do not know how to soften the result of this operator!");
55    abort();
56
57    case ISD::BIT_CONVERT: R = SoftenFloatRes_BIT_CONVERT(N); break;
58    case ISD::BUILD_PAIR:  R = SoftenFloatRes_BUILD_PAIR(N); break;
59    case ISD::ConstantFP:
60      R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
61      break;
62    case ISD::FABS:        R = SoftenFloatRes_FABS(N); break;
63    case ISD::FADD:        R = SoftenFloatRes_FADD(N); break;
64    case ISD::FCEIL:       R = SoftenFloatRes_FCEIL(N); break;
65    case ISD::FCOPYSIGN:   R = SoftenFloatRes_FCOPYSIGN(N); break;
66    case ISD::FCOS:        R = SoftenFloatRes_FCOS(N); break;
67    case ISD::FDIV:        R = SoftenFloatRes_FDIV(N); break;
68    case ISD::FEXP:        R = SoftenFloatRes_FEXP(N); break;
69    case ISD::FEXP2:       R = SoftenFloatRes_FEXP2(N); break;
70    case ISD::FFLOOR:      R = SoftenFloatRes_FFLOOR(N); break;
71    case ISD::FLOG:        R = SoftenFloatRes_FLOG(N); break;
72    case ISD::FLOG2:       R = SoftenFloatRes_FLOG2(N); break;
73    case ISD::FLOG10:      R = SoftenFloatRes_FLOG10(N); break;
74    case ISD::FMUL:        R = SoftenFloatRes_FMUL(N); break;
75    case ISD::FNEARBYINT:  R = SoftenFloatRes_FNEARBYINT(N); break;
76    case ISD::FNEG:        R = SoftenFloatRes_FNEG(N); break;
77    case ISD::FP_EXTEND:   R = SoftenFloatRes_FP_EXTEND(N); break;
78    case ISD::FP_ROUND:    R = SoftenFloatRes_FP_ROUND(N); break;
79    case ISD::FPOW:        R = SoftenFloatRes_FPOW(N); break;
80    case ISD::FPOWI:       R = SoftenFloatRes_FPOWI(N); break;
81    case ISD::FRINT:       R = SoftenFloatRes_FRINT(N); break;
82    case ISD::FSIN:        R = SoftenFloatRes_FSIN(N); break;
83    case ISD::FSQRT:       R = SoftenFloatRes_FSQRT(N); break;
84    case ISD::FSUB:        R = SoftenFloatRes_FSUB(N); break;
85    case ISD::FTRUNC:      R = SoftenFloatRes_FTRUNC(N); break;
86    case ISD::LOAD:        R = SoftenFloatRes_LOAD(N); break;
87    case ISD::SELECT:      R = SoftenFloatRes_SELECT(N); break;
88    case ISD::SELECT_CC:   R = SoftenFloatRes_SELECT_CC(N); break;
89    case ISD::SINT_TO_FP:
90    case ISD::UINT_TO_FP:  R = SoftenFloatRes_XINT_TO_FP(N); break;
91  }
92
93  // If R is null, the sub-method took care of registering the result.
94  if (R.getNode())
95    SetSoftenedFloat(SDValue(N, ResNo), R);
96}
97
98SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
99  return BitConvertToInteger(N->getOperand(0));
100}
101
102SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
103  // Convert the inputs to integers, and build a new pair out of them.
104  return DAG.getNode(ISD::BUILD_PAIR,
105                     TLI.getTypeToTransformTo(N->getValueType(0)),
106                     BitConvertToInteger(N->getOperand(0)),
107                     BitConvertToInteger(N->getOperand(1)));
108}
109
110SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
111  return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
112                         TLI.getTypeToTransformTo(N->getValueType(0)));
113}
114
115SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
116  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
117  unsigned Size = NVT.getSizeInBits();
118
119  // Mask = ~(1 << (Size-1))
120  SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
121                                 NVT);
122  SDValue Op = GetSoftenedFloat(N->getOperand(0));
123  return DAG.getNode(ISD::AND, NVT, Op, Mask);
124}
125
126SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
127  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
128  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
129                     GetSoftenedFloat(N->getOperand(1)) };
130  return MakeLibCall(GetFPLibCall(N->getValueType(0),
131                                  RTLIB::ADD_F32,
132                                  RTLIB::ADD_F64,
133                                  RTLIB::ADD_F80,
134                                  RTLIB::ADD_PPCF128),
135                     NVT, Ops, 2, false);
136}
137
138SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
139  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
140  SDValue Op = GetSoftenedFloat(N->getOperand(0));
141  return MakeLibCall(GetFPLibCall(N->getValueType(0),
142                                  RTLIB::CEIL_F32,
143                                  RTLIB::CEIL_F64,
144                                  RTLIB::CEIL_F80,
145                                  RTLIB::CEIL_PPCF128),
146                     NVT, &Op, 1, false);
147}
148
149SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
150  SDValue LHS = GetSoftenedFloat(N->getOperand(0));
151  SDValue RHS = BitConvertToInteger(N->getOperand(1));
152
153  MVT LVT = LHS.getValueType();
154  MVT RVT = RHS.getValueType();
155
156  unsigned LSize = LVT.getSizeInBits();
157  unsigned RSize = RVT.getSizeInBits();
158
159  // First get the sign bit of second operand.
160  SDValue SignBit = DAG.getNode(ISD::SHL, RVT, DAG.getConstant(1, RVT),
161                                  DAG.getConstant(RSize - 1,
162                                                  TLI.getShiftAmountTy()));
163  SignBit = DAG.getNode(ISD::AND, RVT, RHS, SignBit);
164
165  // Shift right or sign-extend it if the two operands have different types.
166  int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
167  if (SizeDiff > 0) {
168    SignBit = DAG.getNode(ISD::SRL, RVT, SignBit,
169                          DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
170    SignBit = DAG.getNode(ISD::TRUNCATE, LVT, SignBit);
171  } else if (SizeDiff < 0) {
172    SignBit = DAG.getNode(ISD::ANY_EXTEND, LVT, SignBit);
173    SignBit = DAG.getNode(ISD::SHL, LVT, SignBit,
174                          DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
175  }
176
177  // Clear the sign bit of the first operand.
178  SDValue Mask = DAG.getNode(ISD::SHL, LVT, DAG.getConstant(1, LVT),
179                               DAG.getConstant(LSize - 1,
180                                               TLI.getShiftAmountTy()));
181  Mask = DAG.getNode(ISD::SUB, LVT, Mask, DAG.getConstant(1, LVT));
182  LHS = DAG.getNode(ISD::AND, LVT, LHS, Mask);
183
184  // Or the value with the sign bit.
185  return DAG.getNode(ISD::OR, LVT, LHS, SignBit);
186}
187
188SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
189  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
190  SDValue Op = GetSoftenedFloat(N->getOperand(0));
191  return MakeLibCall(GetFPLibCall(N->getValueType(0),
192                                  RTLIB::COS_F32,
193                                  RTLIB::COS_F64,
194                                  RTLIB::COS_F80,
195                                  RTLIB::COS_PPCF128),
196                     NVT, &Op, 1, false);
197}
198
199SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
200  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
201  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
202                     GetSoftenedFloat(N->getOperand(1)) };
203  return MakeLibCall(GetFPLibCall(N->getValueType(0),
204                                  RTLIB::DIV_F32,
205                                  RTLIB::DIV_F64,
206                                  RTLIB::DIV_F80,
207                                  RTLIB::DIV_PPCF128),
208                     NVT, Ops, 2, false);
209}
210
211SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
212  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
213  SDValue Op = GetSoftenedFloat(N->getOperand(0));
214  return MakeLibCall(GetFPLibCall(N->getValueType(0),
215                                  RTLIB::EXP_F32,
216                                  RTLIB::EXP_F64,
217                                  RTLIB::EXP_F80,
218                                  RTLIB::EXP_PPCF128),
219                     NVT, &Op, 1, false);
220}
221
222SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
223  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
224  SDValue Op = GetSoftenedFloat(N->getOperand(0));
225  return MakeLibCall(GetFPLibCall(N->getValueType(0),
226                                  RTLIB::EXP2_F32,
227                                  RTLIB::EXP2_F64,
228                                  RTLIB::EXP2_F80,
229                                  RTLIB::EXP2_PPCF128),
230                     NVT, &Op, 1, false);
231}
232
233SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
234  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
235  SDValue Op = GetSoftenedFloat(N->getOperand(0));
236  return MakeLibCall(GetFPLibCall(N->getValueType(0),
237                                  RTLIB::FLOOR_F32,
238                                  RTLIB::FLOOR_F64,
239                                  RTLIB::FLOOR_F80,
240                                  RTLIB::FLOOR_PPCF128),
241                     NVT, &Op, 1, false);
242}
243
244SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
245  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
246  SDValue Op = GetSoftenedFloat(N->getOperand(0));
247  return MakeLibCall(GetFPLibCall(N->getValueType(0),
248                                  RTLIB::LOG_F32,
249                                  RTLIB::LOG_F64,
250                                  RTLIB::LOG_F80,
251                                  RTLIB::LOG_PPCF128),
252                     NVT, &Op, 1, false);
253}
254
255SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
256  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
257  SDValue Op = GetSoftenedFloat(N->getOperand(0));
258  return MakeLibCall(GetFPLibCall(N->getValueType(0),
259                                  RTLIB::LOG2_F32,
260                                  RTLIB::LOG2_F64,
261                                  RTLIB::LOG2_F80,
262                                  RTLIB::LOG2_PPCF128),
263                     NVT, &Op, 1, false);
264}
265
266SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
267  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
268  SDValue Op = GetSoftenedFloat(N->getOperand(0));
269  return MakeLibCall(GetFPLibCall(N->getValueType(0),
270                                  RTLIB::LOG10_F32,
271                                  RTLIB::LOG10_F64,
272                                  RTLIB::LOG10_F80,
273                                  RTLIB::LOG10_PPCF128),
274                     NVT, &Op, 1, false);
275}
276
277SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
278  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
279  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
280                     GetSoftenedFloat(N->getOperand(1)) };
281  return MakeLibCall(GetFPLibCall(N->getValueType(0),
282                                  RTLIB::MUL_F32,
283                                  RTLIB::MUL_F64,
284                                  RTLIB::MUL_F80,
285                                  RTLIB::MUL_PPCF128),
286                     NVT, Ops, 2, false);
287}
288
289SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
290  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
291  SDValue Op = GetSoftenedFloat(N->getOperand(0));
292  return MakeLibCall(GetFPLibCall(N->getValueType(0),
293                                  RTLIB::NEARBYINT_F32,
294                                  RTLIB::NEARBYINT_F64,
295                                  RTLIB::NEARBYINT_F80,
296                                  RTLIB::NEARBYINT_PPCF128),
297                     NVT, &Op, 1, false);
298}
299
300SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
301  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
302  // Expand Y = FNEG(X) -> Y = SUB -0.0, X
303  SDValue Ops[2] = { DAG.getConstantFP(-0.0, NVT),
304                     GetSoftenedFloat(N->getOperand(0)) };
305  return MakeLibCall(GetFPLibCall(N->getValueType(0),
306                                  RTLIB::SUB_F32,
307                                  RTLIB::SUB_F64,
308                                  RTLIB::SUB_F80,
309                                  RTLIB::SUB_PPCF128),
310                     NVT, Ops, 2, false);
311}
312
313SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
314  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
315  SDValue Op = N->getOperand(0);
316  RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
317  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
318  return MakeLibCall(LC, NVT, &Op, 1, false);
319}
320
321SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
322  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
323  SDValue Op = N->getOperand(0);
324  RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
325  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
326  return MakeLibCall(LC, NVT, &Op, 1, false);
327}
328
329SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
330  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
331  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
332                     GetSoftenedFloat(N->getOperand(1)) };
333  return MakeLibCall(GetFPLibCall(N->getValueType(0),
334                                  RTLIB::POW_F32,
335                                  RTLIB::POW_F64,
336                                  RTLIB::POW_F80,
337                                  RTLIB::POW_PPCF128),
338                     NVT, Ops, 2, false);
339}
340
341SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
342  assert(N->getOperand(1).getValueType() == MVT::i32 &&
343         "Unsupported power type!");
344  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
345  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
346  return MakeLibCall(GetFPLibCall(N->getValueType(0),
347                                  RTLIB::POWI_F32,
348                                  RTLIB::POWI_F64,
349                                  RTLIB::POWI_F80,
350                                  RTLIB::POWI_PPCF128),
351                     NVT, Ops, 2, false);
352}
353
354SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
355  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
356  SDValue Op = GetSoftenedFloat(N->getOperand(0));
357  return MakeLibCall(GetFPLibCall(N->getValueType(0),
358                                  RTLIB::RINT_F32,
359                                  RTLIB::RINT_F64,
360                                  RTLIB::RINT_F80,
361                                  RTLIB::RINT_PPCF128),
362                     NVT, &Op, 1, false);
363}
364
365SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
366  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
367  SDValue Op = GetSoftenedFloat(N->getOperand(0));
368  return MakeLibCall(GetFPLibCall(N->getValueType(0),
369                                  RTLIB::SIN_F32,
370                                  RTLIB::SIN_F64,
371                                  RTLIB::SIN_F80,
372                                  RTLIB::SIN_PPCF128),
373                     NVT, &Op, 1, false);
374}
375
376SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
377  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
378  SDValue Op = GetSoftenedFloat(N->getOperand(0));
379  return MakeLibCall(GetFPLibCall(N->getValueType(0),
380                                  RTLIB::SQRT_F32,
381                                  RTLIB::SQRT_F64,
382                                  RTLIB::SQRT_F80,
383                                  RTLIB::SQRT_PPCF128),
384                     NVT, &Op, 1, false);
385}
386
387SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
388  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
389  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
390                     GetSoftenedFloat(N->getOperand(1)) };
391  return MakeLibCall(GetFPLibCall(N->getValueType(0),
392                                  RTLIB::SUB_F32,
393                                  RTLIB::SUB_F64,
394                                  RTLIB::SUB_F80,
395                                  RTLIB::SUB_PPCF128),
396                     NVT, Ops, 2, false);
397}
398
399SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
400  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
401  SDValue Op = GetSoftenedFloat(N->getOperand(0));
402  return MakeLibCall(GetFPLibCall(N->getValueType(0),
403                                  RTLIB::TRUNC_F32,
404                                  RTLIB::TRUNC_F64,
405                                  RTLIB::TRUNC_F80,
406                                  RTLIB::TRUNC_PPCF128),
407                     NVT, &Op, 1, false);
408}
409
410SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
411  LoadSDNode *L = cast<LoadSDNode>(N);
412  MVT VT = N->getValueType(0);
413  MVT NVT = TLI.getTypeToTransformTo(VT);
414
415  SDValue NewL;
416  if (L->getExtensionType() == ISD::NON_EXTLOAD) {
417    NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
418                       NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
419                       L->getSrcValue(), L->getSrcValueOffset(), NVT,
420                       L->isVolatile(), L->getAlignment());
421    // Legalized the chain result - switch anything that used the old chain to
422    // use the new one.
423    ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
424    return NewL;
425  }
426
427  // Do a non-extending load followed by FP_EXTEND.
428  NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
429                     L->getMemoryVT(), L->getChain(),
430                     L->getBasePtr(), L->getOffset(),
431                     L->getSrcValue(), L->getSrcValueOffset(),
432                     L->getMemoryVT(),
433                     L->isVolatile(), L->getAlignment());
434  // Legalized the chain result - switch anything that used the old chain to
435  // use the new one.
436  ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
437  return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, VT, NewL));
438}
439
440SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
441  SDValue LHS = GetSoftenedFloat(N->getOperand(1));
442  SDValue RHS = GetSoftenedFloat(N->getOperand(2));
443  return DAG.getNode(ISD::SELECT, LHS.getValueType(), N->getOperand(0),LHS,RHS);
444}
445
446SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
447  SDValue LHS = GetSoftenedFloat(N->getOperand(2));
448  SDValue RHS = GetSoftenedFloat(N->getOperand(3));
449  return DAG.getNode(ISD::SELECT_CC, LHS.getValueType(), N->getOperand(0),
450                     N->getOperand(1), LHS, RHS, N->getOperand(4));
451}
452
453SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
454  bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
455  MVT SVT = N->getOperand(0).getValueType();
456  MVT RVT = N->getValueType(0);
457  MVT NVT = MVT();
458
459  // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
460  // a larger type, eg: i8 -> fp.  Even if it is legal, no libcall may exactly
461  // match.  Look for an appropriate libcall.
462  RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
463  for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
464       t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
465    NVT = (MVT::SimpleValueType)t;
466    // The source needs to big enough to hold the operand.
467    if (NVT.bitsGE(SVT))
468      LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
469  }
470  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
471
472  // Sign/zero extend the argument if the libcall takes a larger type.
473  SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
474                           NVT, N->getOperand(0));
475  return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false);
476}
477
478
479//===----------------------------------------------------------------------===//
480//  Operand Float to Integer Conversion..
481//===----------------------------------------------------------------------===//
482
483bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
484  DEBUG(cerr << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
485        cerr << "\n");
486  SDValue Res = SDValue();
487
488  switch (N->getOpcode()) {
489  default:
490#ifndef NDEBUG
491    cerr << "SoftenFloatOperand Op #" << OpNo << ": ";
492    N->dump(&DAG); cerr << "\n";
493#endif
494    assert(0 && "Do not know how to soften this operator's operand!");
495    abort();
496
497  case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
498  case ISD::BR_CC:       Res = SoftenFloatOp_BR_CC(N); break;
499  case ISD::FP_ROUND:    Res = SoftenFloatOp_FP_ROUND(N); break;
500  case ISD::FP_TO_SINT:  Res = SoftenFloatOp_FP_TO_SINT(N); break;
501  case ISD::FP_TO_UINT:  Res = SoftenFloatOp_FP_TO_UINT(N); break;
502  case ISD::SELECT_CC:   Res = SoftenFloatOp_SELECT_CC(N); break;
503  case ISD::SETCC:       Res = SoftenFloatOp_SETCC(N); break;
504  case ISD::STORE:       Res = SoftenFloatOp_STORE(N, OpNo); break;
505  }
506
507  // If the result is null, the sub-method took care of registering results etc.
508  if (!Res.getNode()) return false;
509
510  // If the result is N, the sub-method updated N in place.  Check to see if any
511  // operands are new, and if so, mark them.
512  if (Res.getNode() == N) {
513    // Mark N as new and remark N and its operands.  This allows us to correctly
514    // revisit N if it needs another step of promotion and allows us to visit
515    // any new operands to N.
516    ReanalyzeNode(N);
517    return true;
518  }
519
520  assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
521         "Invalid operand expansion");
522
523  ReplaceValueWith(SDValue(N, 0), Res);
524  return false;
525}
526
527/// SoftenSetCCOperands - Soften the operands of a comparison.  This code is
528/// shared among BR_CC, SELECT_CC, and SETCC handlers.
529void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
530                                           ISD::CondCode &CCCode) {
531  SDValue LHSInt = GetSoftenedFloat(NewLHS);
532  SDValue RHSInt = GetSoftenedFloat(NewRHS);
533  MVT VT = NewLHS.getValueType();
534
535  assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
536
537  // Expand into one or more soft-fp libcall(s).
538  RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
539  switch (CCCode) {
540  case ISD::SETEQ:
541  case ISD::SETOEQ:
542    LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
543    break;
544  case ISD::SETNE:
545  case ISD::SETUNE:
546    LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
547    break;
548  case ISD::SETGE:
549  case ISD::SETOGE:
550    LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
551    break;
552  case ISD::SETLT:
553  case ISD::SETOLT:
554    LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
555    break;
556  case ISD::SETLE:
557  case ISD::SETOLE:
558    LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
559    break;
560  case ISD::SETGT:
561  case ISD::SETOGT:
562    LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
563    break;
564  case ISD::SETUO:
565    LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
566    break;
567  case ISD::SETO:
568    LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
569    break;
570  default:
571    LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
572    switch (CCCode) {
573    case ISD::SETONE:
574      // SETONE = SETOLT | SETOGT
575      LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
576      // Fallthrough
577    case ISD::SETUGT:
578      LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
579      break;
580    case ISD::SETUGE:
581      LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
582      break;
583    case ISD::SETULT:
584      LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
585      break;
586    case ISD::SETULE:
587      LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
588      break;
589    case ISD::SETUEQ:
590      LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
591      break;
592    default: assert(false && "Do not know how to soften this setcc!");
593    }
594  }
595
596  MVT RetVT = MVT::i32; // FIXME: is this the correct return type?
597  SDValue Ops[2] = { LHSInt, RHSInt };
598  NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/);
599  NewRHS = DAG.getConstant(0, RetVT);
600  CCCode = TLI.getCmpLibcallCC(LC1);
601  if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
602    SDValue Tmp = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(NewLHS),
603                                NewLHS, NewRHS, DAG.getCondCode(CCCode));
604    NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/);
605    NewLHS = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(NewLHS), NewLHS,
606                         NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
607    NewLHS = DAG.getNode(ISD::OR, Tmp.getValueType(), Tmp, NewLHS);
608    NewRHS = SDValue();
609  }
610}
611
612SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
613  return DAG.getNode(ISD::BIT_CONVERT, N->getValueType(0),
614                     GetSoftenedFloat(N->getOperand(0)));
615}
616
617SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
618  MVT SVT = N->getOperand(0).getValueType();
619  MVT RVT = N->getValueType(0);
620
621  RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
622  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
623
624  SDValue Op = GetSoftenedFloat(N->getOperand(0));
625  return MakeLibCall(LC, RVT, &Op, 1, false);
626}
627
628SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
629  SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
630  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
631  SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
632
633  // If SoftenSetCCOperands returned a scalar, we need to compare the result
634  // against zero to select between true and false values.
635  if (NewRHS.getNode() == 0) {
636    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
637    CCCode = ISD::SETNE;
638  }
639
640  // Update N to have the operands specified.
641  return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
642                                DAG.getCondCode(CCCode), NewLHS, NewRHS,
643                                N->getOperand(4));
644}
645
646SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
647  MVT RVT = N->getValueType(0);
648  RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
649  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
650  SDValue Op = GetSoftenedFloat(N->getOperand(0));
651  return MakeLibCall(LC, RVT, &Op, 1, false);
652}
653
654SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
655  MVT RVT = N->getValueType(0);
656  RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
657  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
658  SDValue Op = GetSoftenedFloat(N->getOperand(0));
659  return MakeLibCall(LC, RVT, &Op, 1, false);
660}
661
662SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
663  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
664  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
665  SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
666
667  // If SoftenSetCCOperands returned a scalar, we need to compare the result
668  // against zero to select between true and false values.
669  if (NewRHS.getNode() == 0) {
670    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
671    CCCode = ISD::SETNE;
672  }
673
674  // Update N to have the operands specified.
675  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
676                                N->getOperand(2), N->getOperand(3),
677                                DAG.getCondCode(CCCode));
678}
679
680SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
681  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
682  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
683  SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
684
685  // If SoftenSetCCOperands returned a scalar, use it.
686  if (NewRHS.getNode() == 0) {
687    assert(NewLHS.getValueType() == N->getValueType(0) &&
688           "Unexpected setcc expansion!");
689    return NewLHS;
690  }
691
692  // Otherwise, update N to have the operands specified.
693  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
694                                DAG.getCondCode(CCCode));
695}
696
697SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
698  assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
699  assert(OpNo == 1 && "Can only soften the stored value!");
700  StoreSDNode *ST = cast<StoreSDNode>(N);
701  SDValue Val = ST->getValue();
702
703  if (ST->isTruncatingStore())
704    // Do an FP_ROUND followed by a non-truncating store.
705    Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, ST->getMemoryVT(),
706                                          Val, DAG.getIntPtrConstant(0)));
707  else
708    Val = GetSoftenedFloat(Val);
709
710  return DAG.getStore(ST->getChain(), Val, ST->getBasePtr(),
711                      ST->getSrcValue(), ST->getSrcValueOffset(),
712                      ST->isVolatile(), ST->getAlignment());
713}
714
715
716//===----------------------------------------------------------------------===//
717//  Float Result Expansion
718//===----------------------------------------------------------------------===//
719
720/// ExpandFloatResult - This method is called when the specified result of the
721/// specified node is found to need expansion.  At this point, the node may also
722/// have invalid operands or may have other results that need promotion, we just
723/// know that (at least) one result needs expansion.
724void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
725  DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n");
726  SDValue Lo, Hi;
727  Lo = Hi = SDValue();
728
729  // See if the target wants to custom expand this node.
730  if (TLI.getOperationAction(N->getOpcode(), N->getValueType(ResNo)) ==
731      TargetLowering::Custom) {
732    // If the target wants to, allow it to lower this itself.
733    if (SDNode *P = TLI.ReplaceNodeResults(N, DAG)) {
734      // Everything that once used N now uses P.  We are guaranteed that the
735      // result value types of N and the result value types of P match.
736      ReplaceNodeWith(N, P);
737      return;
738    }
739  }
740
741  switch (N->getOpcode()) {
742  default:
743#ifndef NDEBUG
744    cerr << "ExpandFloatResult #" << ResNo << ": ";
745    N->dump(&DAG); cerr << "\n";
746#endif
747    assert(0 && "Do not know how to expand the result of this operator!");
748    abort();
749
750  case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
751  case ISD::UNDEF:        SplitRes_UNDEF(N, Lo, Hi); break;
752  case ISD::SELECT:       SplitRes_SELECT(N, Lo, Hi); break;
753  case ISD::SELECT_CC:    SplitRes_SELECT_CC(N, Lo, Hi); break;
754
755  case ISD::BIT_CONVERT:        ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
756  case ISD::BUILD_PAIR:         ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
757  case ISD::EXTRACT_ELEMENT:    ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
758  case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
759  case ISD::VAARG:              ExpandRes_VAARG(N, Lo, Hi); break;
760
761  case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
762  case ISD::FABS:       ExpandFloatRes_FABS(N, Lo, Hi); break;
763  case ISD::FADD:       ExpandFloatRes_FADD(N, Lo, Hi); break;
764  case ISD::FCEIL:      ExpandFloatRes_FCEIL(N, Lo, Hi); break;
765  case ISD::FCOS:       ExpandFloatRes_FCOS(N, Lo, Hi); break;
766  case ISD::FDIV:       ExpandFloatRes_FDIV(N, Lo, Hi); break;
767  case ISD::FEXP:       ExpandFloatRes_FEXP(N, Lo, Hi); break;
768  case ISD::FEXP2:      ExpandFloatRes_FEXP2(N, Lo, Hi); break;
769  case ISD::FFLOOR:     ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
770  case ISD::FLOG:       ExpandFloatRes_FLOG(N, Lo, Hi); break;
771  case ISD::FLOG2:      ExpandFloatRes_FLOG2(N, Lo, Hi); break;
772  case ISD::FLOG10:     ExpandFloatRes_FLOG10(N, Lo, Hi); break;
773  case ISD::FMUL:       ExpandFloatRes_FMUL(N, Lo, Hi); break;
774  case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
775  case ISD::FNEG:       ExpandFloatRes_FNEG(N, Lo, Hi); break;
776  case ISD::FP_EXTEND:  ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
777  case ISD::FPOW:       ExpandFloatRes_FPOW(N, Lo, Hi); break;
778  case ISD::FPOWI:      ExpandFloatRes_FPOWI(N, Lo, Hi); break;
779  case ISD::FRINT:      ExpandFloatRes_FRINT(N, Lo, Hi); break;
780  case ISD::FSIN:       ExpandFloatRes_FSIN(N, Lo, Hi); break;
781  case ISD::FSQRT:      ExpandFloatRes_FSQRT(N, Lo, Hi); break;
782  case ISD::FSUB:       ExpandFloatRes_FSUB(N, Lo, Hi); break;
783  case ISD::FTRUNC:     ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
784  case ISD::LOAD:       ExpandFloatRes_LOAD(N, Lo, Hi); break;
785  case ISD::SINT_TO_FP:
786  case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
787  }
788
789  // If Lo/Hi is null, the sub-method took care of registering results etc.
790  if (Lo.getNode())
791    SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
792}
793
794void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
795                                                 SDValue &Hi) {
796  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
797  assert(NVT.getSizeInBits() == integerPartWidth &&
798         "Do not know how to expand this float constant!");
799  APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
800  Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
801                                       &C.getRawData()[1])), NVT);
802  Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
803                                       &C.getRawData()[0])), NVT);
804}
805
806void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
807                                           SDValue &Hi) {
808  assert(N->getValueType(0) == MVT::ppcf128 &&
809         "Logic only correct for ppcf128!");
810  SDValue Tmp;
811  GetExpandedFloat(N->getOperand(0), Lo, Tmp);
812  Hi = DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp);
813  // Lo = Hi==fabs(Hi) ? Lo : -Lo;
814  Lo = DAG.getNode(ISD::SELECT_CC, Lo.getValueType(), Tmp, Hi, Lo,
815                   DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo),
816                   DAG.getCondCode(ISD::SETEQ));
817}
818
819void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
820                                           SDValue &Hi) {
821  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
822                                         RTLIB::ADD_F32, RTLIB::ADD_F64,
823                                         RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
824                            N, false);
825  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
826         "Call lowered wrongly!");
827  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
828}
829
830void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
831                                            SDValue &Lo, SDValue &Hi) {
832  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
833                                         RTLIB::CEIL_F32, RTLIB::CEIL_F64,
834                                         RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
835                            N, false);
836  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
837         "Call lowered wrongly!");
838  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
839}
840
841void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
842                                           SDValue &Lo, SDValue &Hi) {
843  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
844                                         RTLIB::COS_F32, RTLIB::COS_F64,
845                                         RTLIB::COS_F80, RTLIB::COS_PPCF128),
846                            N, false);
847  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
848         "Call lowered wrongly!");
849  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
850}
851
852void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
853                                           SDValue &Hi) {
854  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
855  SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
856                                          RTLIB::DIV_F32,
857                                          RTLIB::DIV_F64,
858                                          RTLIB::DIV_F80,
859                                          RTLIB::DIV_PPCF128),
860                             N->getValueType(0), Ops, 2, false);
861  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
862         "Call lowered wrongly!");
863  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
864}
865
866void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
867                                           SDValue &Lo, SDValue &Hi) {
868  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
869                                         RTLIB::EXP_F32, RTLIB::EXP_F64,
870                                         RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
871                            N, false);
872  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
873         "Call lowered wrongly!");
874  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
875}
876
877void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
878                                            SDValue &Lo, SDValue &Hi) {
879  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
880                                         RTLIB::EXP2_F32, RTLIB::EXP2_F64,
881                                         RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
882                            N, false);
883  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
884         "Call lowered wrongly!");
885  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
886}
887
888void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
889                                             SDValue &Lo, SDValue &Hi) {
890  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
891                                         RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
892                                         RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
893                            N, false);
894  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
895         "Call lowered wrongly!");
896  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
897}
898
899void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
900                                           SDValue &Lo, SDValue &Hi) {
901  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
902                                         RTLIB::LOG_F32, RTLIB::LOG_F64,
903                                         RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
904                            N, false);
905  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
906         "Call lowered wrongly!");
907  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
908}
909
910void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
911                                            SDValue &Lo, SDValue &Hi) {
912  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
913                                         RTLIB::LOG2_F32, RTLIB::LOG2_F64,
914                                         RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
915                            N, false);
916  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
917         "Call lowered wrongly!");
918  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
919}
920
921void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
922                                             SDValue &Lo, SDValue &Hi) {
923  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
924                                         RTLIB::LOG10_F32,RTLIB::LOG10_F64,
925                                         RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
926                            N, false);
927  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
928         "Call lowered wrongly!");
929  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
930}
931
932void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
933                                           SDValue &Hi) {
934  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
935  SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
936                                          RTLIB::MUL_F32,
937                                          RTLIB::MUL_F64,
938                                          RTLIB::MUL_F80,
939                                          RTLIB::MUL_PPCF128),
940                             N->getValueType(0), Ops, 2, false);
941  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
942         "Call lowered wrongly!");
943  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
944}
945
946void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
947                                                 SDValue &Lo, SDValue &Hi) {
948  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
949                                         RTLIB::NEARBYINT_F32,
950                                         RTLIB::NEARBYINT_F64,
951                                         RTLIB::NEARBYINT_F80,
952                                         RTLIB::NEARBYINT_PPCF128),
953                            N, false);
954  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
955         "Call lowered wrongly!");
956  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
957}
958
959void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
960                                           SDValue &Hi) {
961  GetExpandedFloat(N->getOperand(0), Lo, Hi);
962  Lo = DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo);
963  Hi = DAG.getNode(ISD::FNEG, Hi.getValueType(), Hi);
964}
965
966void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
967                                                SDValue &Hi) {
968  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
969  Hi = DAG.getNode(ISD::FP_EXTEND, NVT, N->getOperand(0));
970  Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
971}
972
973void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
974                                           SDValue &Lo, SDValue &Hi) {
975  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
976                                         RTLIB::POW_F32, RTLIB::POW_F64,
977                                         RTLIB::POW_F80, RTLIB::POW_PPCF128),
978                            N, false);
979  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
980         "Call lowered wrongly!");
981  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
982}
983
984void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
985                                            SDValue &Lo, SDValue &Hi) {
986  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
987                                         RTLIB::POWI_F32, RTLIB::POWI_F64,
988                                         RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
989                            N, false);
990  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
991         "Call lowered wrongly!");
992  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
993}
994
995void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
996                                            SDValue &Lo, SDValue &Hi) {
997  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
998                                         RTLIB::RINT_F32, RTLIB::RINT_F64,
999                                         RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1000                            N, false);
1001  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1002         "Call lowered wrongly!");
1003  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1004}
1005
1006void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1007                                           SDValue &Lo, SDValue &Hi) {
1008  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1009                                         RTLIB::SIN_F32, RTLIB::SIN_F64,
1010                                         RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1011                            N, false);
1012  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1013         "Call lowered wrongly!");
1014  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1015}
1016
1017void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1018                                            SDValue &Lo, SDValue &Hi) {
1019  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1020                                         RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1021                                         RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1022                            N, false);
1023  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1024         "Call lowered wrongly!");
1025  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1026}
1027
1028void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1029                                           SDValue &Hi) {
1030  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1031  SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1032                                          RTLIB::SUB_F32,
1033                                          RTLIB::SUB_F64,
1034                                          RTLIB::SUB_F80,
1035                                          RTLIB::SUB_PPCF128),
1036                             N->getValueType(0), Ops, 2, false);
1037  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1038         "Call lowered wrongly!");
1039  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1040}
1041
1042void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1043                                             SDValue &Lo, SDValue &Hi) {
1044  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1045                                         RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1046                                         RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1047                            N, false);
1048  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1049         "Call lowered wrongly!");
1050  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1051}
1052
1053void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1054                                           SDValue &Hi) {
1055  if (ISD::isNormalLoad(N)) {
1056    ExpandRes_NormalLoad(N, Lo, Hi);
1057    return;
1058  }
1059
1060  assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1061  LoadSDNode *LD = cast<LoadSDNode>(N);
1062  SDValue Chain = LD->getChain();
1063  SDValue Ptr = LD->getBasePtr();
1064
1065  MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
1066  assert(NVT.isByteSized() && "Expanded type not byte sized!");
1067  assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1068
1069  Hi = DAG.getExtLoad(LD->getExtensionType(), NVT, Chain, Ptr,
1070                      LD->getSrcValue(), LD->getSrcValueOffset(),
1071                      LD->getMemoryVT(),
1072                      LD->isVolatile(), LD->getAlignment());
1073
1074  // Remember the chain.
1075  Chain = Hi.getValue(1);
1076
1077  // The low part is zero.
1078  Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1079
1080  // Modified the chain - switch anything that used the old chain to use the
1081  // new one.
1082  ReplaceValueWith(SDValue(LD, 1), Chain);
1083}
1084
1085void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1086                                                 SDValue &Hi) {
1087  assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1088  MVT VT = N->getValueType(0);
1089  MVT NVT = TLI.getTypeToTransformTo(VT);
1090  SDValue Src = N->getOperand(0);
1091  MVT SrcVT = Src.getValueType();
1092  bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1093
1094  // First do an SINT_TO_FP, whether the original was signed or unsigned.
1095  // When promoting partial word types to i32 we must honor the signedness,
1096  // though.
1097  if (SrcVT.bitsLE(MVT::i32)) {
1098    // The integer can be represented exactly in an f64.
1099    Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
1100                      MVT::i32, Src);
1101    Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1102    Hi = DAG.getNode(ISD::SINT_TO_FP, NVT, Src);
1103  } else {
1104    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1105    if (SrcVT.bitsLE(MVT::i64)) {
1106      Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
1107                        MVT::i64, Src);
1108      LC = RTLIB::SINTTOFP_I64_PPCF128;
1109    } else if (SrcVT.bitsLE(MVT::i128)) {
1110      Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i128, Src);
1111      LC = RTLIB::SINTTOFP_I128_PPCF128;
1112    }
1113    assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1114
1115    Hi = MakeLibCall(LC, VT, &Src, 1, true);
1116    assert(Hi.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1117           "Call lowered wrongly!");
1118    Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
1119  }
1120
1121  if (isSigned)
1122    return;
1123
1124  // Unsigned - fix up the SINT_TO_FP value just calculated.
1125  Hi = DAG.getNode(ISD::BUILD_PAIR, VT, Lo, Hi);
1126  SrcVT = Src.getValueType();
1127
1128  // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1129  static const uint64_t TwoE32[]  = { 0x41f0000000000000LL, 0 };
1130  static const uint64_t TwoE64[]  = { 0x43f0000000000000LL, 0 };
1131  static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1132  const uint64_t *Parts = 0;
1133
1134  switch (SrcVT.getSimpleVT()) {
1135  default:
1136    assert(false && "Unsupported UINT_TO_FP!");
1137  case MVT::i32:
1138    Parts = TwoE32;
1139    break;
1140  case MVT::i64:
1141    Parts = TwoE64;
1142    break;
1143  case MVT::i128:
1144    Parts = TwoE128;
1145    break;
1146  }
1147
1148  Lo = DAG.getNode(ISD::FADD, VT, Hi,
1149                   DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1150                                     MVT::ppcf128));
1151  Lo = DAG.getNode(ISD::SELECT_CC, VT, Src, DAG.getConstant(0, SrcVT), Lo, Hi,
1152                   DAG.getCondCode(ISD::SETLT));
1153  Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(1));
1154  Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(0));
1155}
1156
1157
1158//===----------------------------------------------------------------------===//
1159//  Float Operand Expansion
1160//===----------------------------------------------------------------------===//
1161
1162/// ExpandFloatOperand - This method is called when the specified operand of the
1163/// specified node is found to need expansion.  At this point, all of the result
1164/// types of the node are known to be legal, but other operands of the node may
1165/// need promotion or expansion as well as the specified one.
1166bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1167  DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n");
1168  SDValue Res = SDValue();
1169
1170  if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1171      == TargetLowering::Custom)
1172    Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1173
1174  if (Res.getNode() == 0) {
1175    switch (N->getOpcode()) {
1176    default:
1177  #ifndef NDEBUG
1178      cerr << "ExpandFloatOperand Op #" << OpNo << ": ";
1179      N->dump(&DAG); cerr << "\n";
1180  #endif
1181      assert(0 && "Do not know how to expand this operator's operand!");
1182      abort();
1183
1184    case ISD::BIT_CONVERT:     Res = ExpandOp_BIT_CONVERT(N); break;
1185    case ISD::BUILD_VECTOR:    Res = ExpandOp_BUILD_VECTOR(N); break;
1186    case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1187
1188    case ISD::BR_CC:      Res = ExpandFloatOp_BR_CC(N); break;
1189    case ISD::FP_ROUND:   Res = ExpandFloatOp_FP_ROUND(N); break;
1190    case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1191    case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1192    case ISD::SELECT_CC:  Res = ExpandFloatOp_SELECT_CC(N); break;
1193    case ISD::SETCC:      Res = ExpandFloatOp_SETCC(N); break;
1194    case ISD::STORE:      Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1195                                                    OpNo); break;
1196    }
1197  }
1198
1199  // If the result is null, the sub-method took care of registering results etc.
1200  if (!Res.getNode()) return false;
1201  // If the result is N, the sub-method updated N in place.  Check to see if any
1202  // operands are new, and if so, mark them.
1203  if (Res.getNode() == N) {
1204    // Mark N as new and remark N and its operands.  This allows us to correctly
1205    // revisit N if it needs another step of expansion and allows us to visit
1206    // any new operands to N.
1207    ReanalyzeNode(N);
1208    return true;
1209  }
1210
1211  assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1212         "Invalid operand expansion");
1213
1214  ReplaceValueWith(SDValue(N, 0), Res);
1215  return false;
1216}
1217
1218/// FloatExpandSetCCOperands - Expand the operands of a comparison.  This code
1219/// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1220void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1221                                                SDValue &NewRHS,
1222                                                ISD::CondCode &CCCode) {
1223  SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1224  GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1225  GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1226
1227  MVT VT = NewLHS.getValueType();
1228  assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1229
1230  // FIXME:  This generated code sucks.  We want to generate
1231  //         FCMPU crN, hi1, hi2
1232  //         BNE crN, L:
1233  //         FCMPU crN, lo1, lo2
1234  // The following can be improved, but not that much.
1235  SDValue Tmp1, Tmp2, Tmp3;
1236  Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETOEQ);
1237  Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSLo), LHSLo, RHSLo, CCCode);
1238  Tmp3 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1239  Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, ISD::SETUNE);
1240  Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi), LHSHi, RHSHi, CCCode);
1241  Tmp1 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1242  NewLHS = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp3);
1243  NewRHS = SDValue();   // LHS is the result, not a compare.
1244}
1245
1246SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1247  SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1248  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1249  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1250
1251  // If ExpandSetCCOperands returned a scalar, we need to compare the result
1252  // against zero to select between true and false values.
1253  if (NewRHS.getNode() == 0) {
1254    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1255    CCCode = ISD::SETNE;
1256  }
1257
1258  // Update N to have the operands specified.
1259  return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1260                                DAG.getCondCode(CCCode), NewLHS, NewRHS,
1261                                N->getOperand(4));
1262}
1263
1264SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1265  assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1266         "Logic only correct for ppcf128!");
1267  SDValue Lo, Hi;
1268  GetExpandedFloat(N->getOperand(0), Lo, Hi);
1269  // Round it the rest of the way (e.g. to f32) if needed.
1270  return DAG.getNode(ISD::FP_ROUND, N->getValueType(0), Hi, N->getOperand(1));
1271}
1272
1273SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1274  MVT RVT = N->getValueType(0);
1275
1276  // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1277  // PPC (the libcall is not available).  FIXME: Do this in a less hacky way.
1278  if (RVT == MVT::i32) {
1279    assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1280           "Logic only correct for ppcf128!");
1281    SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, MVT::ppcf128,
1282                              N->getOperand(0), DAG.getValueType(MVT::f64));
1283    Res = DAG.getNode(ISD::FP_ROUND, MVT::f64, Res, DAG.getIntPtrConstant(1));
1284    return DAG.getNode(ISD::FP_TO_SINT, MVT::i32, Res);
1285  }
1286
1287  RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1288  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1289  return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false);
1290}
1291
1292SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1293  MVT RVT = N->getValueType(0);
1294
1295  // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1296  // PPC (the libcall is not available).  FIXME: Do this in a less hacky way.
1297  if (RVT == MVT::i32) {
1298    assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1299           "Logic only correct for ppcf128!");
1300    const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1301    APFloat APF = APFloat(APInt(128, 2, TwoE31));
1302    SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1303    //  X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1304    // FIXME: generated code sucks.
1305    return DAG.getNode(ISD::SELECT_CC, MVT::i32, N->getOperand(0), Tmp,
1306                       DAG.getNode(ISD::ADD, MVT::i32,
1307                                   DAG.getNode(ISD::FP_TO_SINT, MVT::i32,
1308                                               DAG.getNode(ISD::FSUB,
1309                                                           MVT::ppcf128,
1310                                                           N->getOperand(0),
1311                                                           Tmp)),
1312                                   DAG.getConstant(0x80000000, MVT::i32)),
1313                       DAG.getNode(ISD::FP_TO_SINT, MVT::i32, N->getOperand(0)),
1314                       DAG.getCondCode(ISD::SETGE));
1315  }
1316
1317  RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1318  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1319  return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false);
1320}
1321
1322SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1323  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1324  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1325  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1326
1327  // If ExpandSetCCOperands returned a scalar, we need to compare the result
1328  // against zero to select between true and false values.
1329  if (NewRHS.getNode() == 0) {
1330    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1331    CCCode = ISD::SETNE;
1332  }
1333
1334  // Update N to have the operands specified.
1335  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1336                                N->getOperand(2), N->getOperand(3),
1337                                DAG.getCondCode(CCCode));
1338}
1339
1340SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1341  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1342  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1343  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1344
1345  // If ExpandSetCCOperands returned a scalar, use it.
1346  if (NewRHS.getNode() == 0) {
1347    assert(NewLHS.getValueType() == N->getValueType(0) &&
1348           "Unexpected setcc expansion!");
1349    return NewLHS;
1350  }
1351
1352  // Otherwise, update N to have the operands specified.
1353  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1354                                DAG.getCondCode(CCCode));
1355}
1356
1357SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1358  if (ISD::isNormalStore(N))
1359    return ExpandOp_NormalStore(N, OpNo);
1360
1361  assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1362  assert(OpNo == 1 && "Can only expand the stored value so far");
1363  StoreSDNode *ST = cast<StoreSDNode>(N);
1364
1365  SDValue Chain = ST->getChain();
1366  SDValue Ptr = ST->getBasePtr();
1367
1368  MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType());
1369  assert(NVT.isByteSized() && "Expanded type not byte sized!");
1370  assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1371
1372  SDValue Lo, Hi;
1373  GetExpandedOp(ST->getValue(), Lo, Hi);
1374
1375  return DAG.getTruncStore(Chain, Hi, Ptr,
1376                           ST->getSrcValue(), ST->getSrcValueOffset(),
1377                           ST->getMemoryVT(),
1378                           ST->isVolatile(), ST->getAlignment());
1379}
1380