LegalizeFloatTypes.cpp revision 9fbc7e2e7a765298fb4326885b407e0962f7ab62 
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, N->getValueType(0)),
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.  Tell the legalizer
511  // core about this.
512  if (Res.getNode() == N)
513    return true;
514
515  assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
516         "Invalid operand expansion");
517
518  ReplaceValueWith(SDValue(N, 0), Res);
519  return false;
520}
521
522/// SoftenSetCCOperands - Soften the operands of a comparison.  This code is
523/// shared among BR_CC, SELECT_CC, and SETCC handlers.
524void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
525                                           ISD::CondCode &CCCode) {
526  SDValue LHSInt = GetSoftenedFloat(NewLHS);
527  SDValue RHSInt = GetSoftenedFloat(NewRHS);
528  MVT VT = NewLHS.getValueType();
529
530  assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
531
532  // Expand into one or more soft-fp libcall(s).
533  RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
534  switch (CCCode) {
535  case ISD::SETEQ:
536  case ISD::SETOEQ:
537    LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
538    break;
539  case ISD::SETNE:
540  case ISD::SETUNE:
541    LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
542    break;
543  case ISD::SETGE:
544  case ISD::SETOGE:
545    LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
546    break;
547  case ISD::SETLT:
548  case ISD::SETOLT:
549    LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
550    break;
551  case ISD::SETLE:
552  case ISD::SETOLE:
553    LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
554    break;
555  case ISD::SETGT:
556  case ISD::SETOGT:
557    LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
558    break;
559  case ISD::SETUO:
560    LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
561    break;
562  case ISD::SETO:
563    LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
564    break;
565  default:
566    LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
567    switch (CCCode) {
568    case ISD::SETONE:
569      // SETONE = SETOLT | SETOGT
570      LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
571      // Fallthrough
572    case ISD::SETUGT:
573      LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
574      break;
575    case ISD::SETUGE:
576      LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
577      break;
578    case ISD::SETULT:
579      LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
580      break;
581    case ISD::SETULE:
582      LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
583      break;
584    case ISD::SETUEQ:
585      LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
586      break;
587    default: assert(false && "Do not know how to soften this setcc!");
588    }
589  }
590
591  MVT RetVT = MVT::i32; // FIXME: is this the correct return type?
592  SDValue Ops[2] = { LHSInt, RHSInt };
593  NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/);
594  NewRHS = DAG.getConstant(0, RetVT);
595  CCCode = TLI.getCmpLibcallCC(LC1);
596  if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
597    SDValue Tmp = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(RetVT),
598                                NewLHS, NewRHS, DAG.getCondCode(CCCode));
599    NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/);
600    NewLHS = DAG.getNode(ISD::SETCC, TLI.getSetCCResultType(RetVT), NewLHS,
601                         NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
602    NewLHS = DAG.getNode(ISD::OR, Tmp.getValueType(), Tmp, NewLHS);
603    NewRHS = SDValue();
604  }
605}
606
607SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
608  return DAG.getNode(ISD::BIT_CONVERT, N->getValueType(0),
609                     GetSoftenedFloat(N->getOperand(0)));
610}
611
612SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
613  MVT SVT = N->getOperand(0).getValueType();
614  MVT RVT = N->getValueType(0);
615
616  RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
617  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
618
619  SDValue Op = GetSoftenedFloat(N->getOperand(0));
620  return MakeLibCall(LC, RVT, &Op, 1, false);
621}
622
623SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
624  SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
625  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
626  SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
627
628  // If SoftenSetCCOperands returned a scalar, we need to compare the result
629  // against zero to select between true and false values.
630  if (NewRHS.getNode() == 0) {
631    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
632    CCCode = ISD::SETNE;
633  }
634
635  // Update N to have the operands specified.
636  return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
637                                DAG.getCondCode(CCCode), NewLHS, NewRHS,
638                                N->getOperand(4));
639}
640
641SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
642  MVT RVT = N->getValueType(0);
643  RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
644  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
645  SDValue Op = GetSoftenedFloat(N->getOperand(0));
646  return MakeLibCall(LC, RVT, &Op, 1, false);
647}
648
649SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
650  MVT RVT = N->getValueType(0);
651  RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
652  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
653  SDValue Op = GetSoftenedFloat(N->getOperand(0));
654  return MakeLibCall(LC, RVT, &Op, 1, false);
655}
656
657SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
658  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
659  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
660  SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
661
662  // If SoftenSetCCOperands returned a scalar, we need to compare the result
663  // against zero to select between true and false values.
664  if (NewRHS.getNode() == 0) {
665    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
666    CCCode = ISD::SETNE;
667  }
668
669  // Update N to have the operands specified.
670  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
671                                N->getOperand(2), N->getOperand(3),
672                                DAG.getCondCode(CCCode));
673}
674
675SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
676  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
677  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
678  SoftenSetCCOperands(NewLHS, NewRHS, CCCode);
679
680  // If SoftenSetCCOperands returned a scalar, use it.
681  if (NewRHS.getNode() == 0) {
682    assert(NewLHS.getValueType() == N->getValueType(0) &&
683           "Unexpected setcc expansion!");
684    return NewLHS;
685  }
686
687  // Otherwise, update N to have the operands specified.
688  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
689                                DAG.getCondCode(CCCode));
690}
691
692SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
693  assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
694  assert(OpNo == 1 && "Can only soften the stored value!");
695  StoreSDNode *ST = cast<StoreSDNode>(N);
696  SDValue Val = ST->getValue();
697
698  if (ST->isTruncatingStore())
699    // Do an FP_ROUND followed by a non-truncating store.
700    Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, ST->getMemoryVT(),
701                                          Val, DAG.getIntPtrConstant(0)));
702  else
703    Val = GetSoftenedFloat(Val);
704
705  return DAG.getStore(ST->getChain(), Val, ST->getBasePtr(),
706                      ST->getSrcValue(), ST->getSrcValueOffset(),
707                      ST->isVolatile(), ST->getAlignment());
708}
709
710
711//===----------------------------------------------------------------------===//
712//  Float Result Expansion
713//===----------------------------------------------------------------------===//
714
715/// ExpandFloatResult - This method is called when the specified result of the
716/// specified node is found to need expansion.  At this point, the node may also
717/// have invalid operands or may have other results that need promotion, we just
718/// know that (at least) one result needs expansion.
719void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
720  DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n");
721  SDValue Lo, Hi;
722  Lo = Hi = SDValue();
723
724  // See if the target wants to custom expand this node.
725  if (CustomLowerResults(N, N->getValueType(ResNo), true))
726    return;
727
728  switch (N->getOpcode()) {
729  default:
730#ifndef NDEBUG
731    cerr << "ExpandFloatResult #" << ResNo << ": ";
732    N->dump(&DAG); cerr << "\n";
733#endif
734    assert(0 && "Do not know how to expand the result of this operator!");
735    abort();
736
737  case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
738  case ISD::UNDEF:        SplitRes_UNDEF(N, Lo, Hi); break;
739  case ISD::SELECT:       SplitRes_SELECT(N, Lo, Hi); break;
740  case ISD::SELECT_CC:    SplitRes_SELECT_CC(N, Lo, Hi); break;
741
742  case ISD::BIT_CONVERT:        ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
743  case ISD::BUILD_PAIR:         ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
744  case ISD::EXTRACT_ELEMENT:    ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
745  case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
746  case ISD::VAARG:              ExpandRes_VAARG(N, Lo, Hi); break;
747
748  case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
749  case ISD::FABS:       ExpandFloatRes_FABS(N, Lo, Hi); break;
750  case ISD::FADD:       ExpandFloatRes_FADD(N, Lo, Hi); break;
751  case ISD::FCEIL:      ExpandFloatRes_FCEIL(N, Lo, Hi); break;
752  case ISD::FCOS:       ExpandFloatRes_FCOS(N, Lo, Hi); break;
753  case ISD::FDIV:       ExpandFloatRes_FDIV(N, Lo, Hi); break;
754  case ISD::FEXP:       ExpandFloatRes_FEXP(N, Lo, Hi); break;
755  case ISD::FEXP2:      ExpandFloatRes_FEXP2(N, Lo, Hi); break;
756  case ISD::FFLOOR:     ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
757  case ISD::FLOG:       ExpandFloatRes_FLOG(N, Lo, Hi); break;
758  case ISD::FLOG2:      ExpandFloatRes_FLOG2(N, Lo, Hi); break;
759  case ISD::FLOG10:     ExpandFloatRes_FLOG10(N, Lo, Hi); break;
760  case ISD::FMUL:       ExpandFloatRes_FMUL(N, Lo, Hi); break;
761  case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
762  case ISD::FNEG:       ExpandFloatRes_FNEG(N, Lo, Hi); break;
763  case ISD::FP_EXTEND:  ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
764  case ISD::FPOW:       ExpandFloatRes_FPOW(N, Lo, Hi); break;
765  case ISD::FPOWI:      ExpandFloatRes_FPOWI(N, Lo, Hi); break;
766  case ISD::FRINT:      ExpandFloatRes_FRINT(N, Lo, Hi); break;
767  case ISD::FSIN:       ExpandFloatRes_FSIN(N, Lo, Hi); break;
768  case ISD::FSQRT:      ExpandFloatRes_FSQRT(N, Lo, Hi); break;
769  case ISD::FSUB:       ExpandFloatRes_FSUB(N, Lo, Hi); break;
770  case ISD::FTRUNC:     ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
771  case ISD::LOAD:       ExpandFloatRes_LOAD(N, Lo, Hi); break;
772  case ISD::SINT_TO_FP:
773  case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
774  }
775
776  // If Lo/Hi is null, the sub-method took care of registering results etc.
777  if (Lo.getNode())
778    SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
779}
780
781void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
782                                                 SDValue &Hi) {
783  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
784  assert(NVT.getSizeInBits() == integerPartWidth &&
785         "Do not know how to expand this float constant!");
786  APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
787  Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
788                                       &C.getRawData()[1])), NVT);
789  Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
790                                       &C.getRawData()[0])), NVT);
791}
792
793void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
794                                           SDValue &Hi) {
795  assert(N->getValueType(0) == MVT::ppcf128 &&
796         "Logic only correct for ppcf128!");
797  SDValue Tmp;
798  GetExpandedFloat(N->getOperand(0), Lo, Tmp);
799  Hi = DAG.getNode(ISD::FABS, Tmp.getValueType(), Tmp);
800  // Lo = Hi==fabs(Hi) ? Lo : -Lo;
801  Lo = DAG.getNode(ISD::SELECT_CC, Lo.getValueType(), Tmp, Hi, Lo,
802                   DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo),
803                   DAG.getCondCode(ISD::SETEQ));
804}
805
806void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
807                                           SDValue &Hi) {
808  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
809                                         RTLIB::ADD_F32, RTLIB::ADD_F64,
810                                         RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
811                            N, false);
812  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
813         "Call lowered wrongly!");
814  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
815}
816
817void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
818                                            SDValue &Lo, SDValue &Hi) {
819  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
820                                         RTLIB::CEIL_F32, RTLIB::CEIL_F64,
821                                         RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
822                            N, false);
823  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
824         "Call lowered wrongly!");
825  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
826}
827
828void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
829                                           SDValue &Lo, SDValue &Hi) {
830  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
831                                         RTLIB::COS_F32, RTLIB::COS_F64,
832                                         RTLIB::COS_F80, RTLIB::COS_PPCF128),
833                            N, false);
834  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
835         "Call lowered wrongly!");
836  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
837}
838
839void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
840                                           SDValue &Hi) {
841  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
842  SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
843                                          RTLIB::DIV_F32,
844                                          RTLIB::DIV_F64,
845                                          RTLIB::DIV_F80,
846                                          RTLIB::DIV_PPCF128),
847                             N->getValueType(0), Ops, 2, false);
848  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
849         "Call lowered wrongly!");
850  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
851}
852
853void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
854                                           SDValue &Lo, SDValue &Hi) {
855  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
856                                         RTLIB::EXP_F32, RTLIB::EXP_F64,
857                                         RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
858                            N, false);
859  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
860         "Call lowered wrongly!");
861  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
862}
863
864void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
865                                            SDValue &Lo, SDValue &Hi) {
866  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
867                                         RTLIB::EXP2_F32, RTLIB::EXP2_F64,
868                                         RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
869                            N, false);
870  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
871         "Call lowered wrongly!");
872  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
873}
874
875void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
876                                             SDValue &Lo, SDValue &Hi) {
877  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
878                                         RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
879                                         RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
880                            N, false);
881  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
882         "Call lowered wrongly!");
883  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
884}
885
886void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
887                                           SDValue &Lo, SDValue &Hi) {
888  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
889                                         RTLIB::LOG_F32, RTLIB::LOG_F64,
890                                         RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
891                            N, false);
892  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
893         "Call lowered wrongly!");
894  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
895}
896
897void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
898                                            SDValue &Lo, SDValue &Hi) {
899  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
900                                         RTLIB::LOG2_F32, RTLIB::LOG2_F64,
901                                         RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
902                            N, false);
903  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
904         "Call lowered wrongly!");
905  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
906}
907
908void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
909                                             SDValue &Lo, SDValue &Hi) {
910  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
911                                         RTLIB::LOG10_F32,RTLIB::LOG10_F64,
912                                         RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
913                            N, false);
914  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
915         "Call lowered wrongly!");
916  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
917}
918
919void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
920                                           SDValue &Hi) {
921  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
922  SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
923                                          RTLIB::MUL_F32,
924                                          RTLIB::MUL_F64,
925                                          RTLIB::MUL_F80,
926                                          RTLIB::MUL_PPCF128),
927                             N->getValueType(0), Ops, 2, false);
928  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
929         "Call lowered wrongly!");
930  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
931}
932
933void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
934                                                 SDValue &Lo, SDValue &Hi) {
935  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
936                                         RTLIB::NEARBYINT_F32,
937                                         RTLIB::NEARBYINT_F64,
938                                         RTLIB::NEARBYINT_F80,
939                                         RTLIB::NEARBYINT_PPCF128),
940                            N, 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_FNEG(SDNode *N, SDValue &Lo,
947                                           SDValue &Hi) {
948  GetExpandedFloat(N->getOperand(0), Lo, Hi);
949  Lo = DAG.getNode(ISD::FNEG, Lo.getValueType(), Lo);
950  Hi = DAG.getNode(ISD::FNEG, Hi.getValueType(), Hi);
951}
952
953void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
954                                                SDValue &Hi) {
955  MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
956  Hi = DAG.getNode(ISD::FP_EXTEND, NVT, N->getOperand(0));
957  Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
958}
959
960void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
961                                           SDValue &Lo, SDValue &Hi) {
962  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
963                                         RTLIB::POW_F32, RTLIB::POW_F64,
964                                         RTLIB::POW_F80, RTLIB::POW_PPCF128),
965                            N, false);
966  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
967         "Call lowered wrongly!");
968  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
969}
970
971void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
972                                            SDValue &Lo, SDValue &Hi) {
973  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
974                                         RTLIB::POWI_F32, RTLIB::POWI_F64,
975                                         RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
976                            N, false);
977  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
978         "Call lowered wrongly!");
979  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
980}
981
982void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
983                                            SDValue &Lo, SDValue &Hi) {
984  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
985                                         RTLIB::RINT_F32, RTLIB::RINT_F64,
986                                         RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
987                            N, false);
988  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
989         "Call lowered wrongly!");
990  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
991}
992
993void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
994                                           SDValue &Lo, SDValue &Hi) {
995  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
996                                         RTLIB::SIN_F32, RTLIB::SIN_F64,
997                                         RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
998                            N, false);
999  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1000         "Call lowered wrongly!");
1001  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1002}
1003
1004void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1005                                            SDValue &Lo, SDValue &Hi) {
1006  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1007                                         RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1008                                         RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1009                            N, false);
1010  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1011         "Call lowered wrongly!");
1012  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1013}
1014
1015void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1016                                           SDValue &Hi) {
1017  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1018  SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1019                                          RTLIB::SUB_F32,
1020                                          RTLIB::SUB_F64,
1021                                          RTLIB::SUB_F80,
1022                                          RTLIB::SUB_PPCF128),
1023                             N->getValueType(0), Ops, 2, false);
1024  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1025         "Call lowered wrongly!");
1026  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1027}
1028
1029void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1030                                             SDValue &Lo, SDValue &Hi) {
1031  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1032                                         RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1033                                         RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1034                            N, false);
1035  assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1036         "Call lowered wrongly!");
1037  Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1038}
1039
1040void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1041                                           SDValue &Hi) {
1042  if (ISD::isNormalLoad(N)) {
1043    ExpandRes_NormalLoad(N, Lo, Hi);
1044    return;
1045  }
1046
1047  assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1048  LoadSDNode *LD = cast<LoadSDNode>(N);
1049  SDValue Chain = LD->getChain();
1050  SDValue Ptr = LD->getBasePtr();
1051
1052  MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
1053  assert(NVT.isByteSized() && "Expanded type not byte sized!");
1054  assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1055
1056  Hi = DAG.getExtLoad(LD->getExtensionType(), NVT, Chain, Ptr,
1057                      LD->getSrcValue(), LD->getSrcValueOffset(),
1058                      LD->getMemoryVT(),
1059                      LD->isVolatile(), LD->getAlignment());
1060
1061  // Remember the chain.
1062  Chain = Hi.getValue(1);
1063
1064  // The low part is zero.
1065  Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1066
1067  // Modified the chain - switch anything that used the old chain to use the
1068  // new one.
1069  ReplaceValueWith(SDValue(LD, 1), Chain);
1070}
1071
1072void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1073                                                 SDValue &Hi) {
1074  assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1075  MVT VT = N->getValueType(0);
1076  MVT NVT = TLI.getTypeToTransformTo(VT);
1077  SDValue Src = N->getOperand(0);
1078  MVT SrcVT = Src.getValueType();
1079  bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1080
1081  // First do an SINT_TO_FP, whether the original was signed or unsigned.
1082  // When promoting partial word types to i32 we must honor the signedness,
1083  // though.
1084  if (SrcVT.bitsLE(MVT::i32)) {
1085    // The integer can be represented exactly in an f64.
1086    Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
1087                      MVT::i32, Src);
1088    Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1089    Hi = DAG.getNode(ISD::SINT_TO_FP, NVT, Src);
1090  } else {
1091    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1092    if (SrcVT.bitsLE(MVT::i64)) {
1093      Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND,
1094                        MVT::i64, Src);
1095      LC = RTLIB::SINTTOFP_I64_PPCF128;
1096    } else if (SrcVT.bitsLE(MVT::i128)) {
1097      Src = DAG.getNode(ISD::SIGN_EXTEND, MVT::i128, Src);
1098      LC = RTLIB::SINTTOFP_I128_PPCF128;
1099    }
1100    assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1101
1102    Hi = MakeLibCall(LC, VT, &Src, 1, true);
1103    assert(Hi.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1104           "Call lowered wrongly!");
1105    Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
1106  }
1107
1108  if (isSigned)
1109    return;
1110
1111  // Unsigned - fix up the SINT_TO_FP value just calculated.
1112  Hi = DAG.getNode(ISD::BUILD_PAIR, VT, Lo, Hi);
1113  SrcVT = Src.getValueType();
1114
1115  // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1116  static const uint64_t TwoE32[]  = { 0x41f0000000000000LL, 0 };
1117  static const uint64_t TwoE64[]  = { 0x43f0000000000000LL, 0 };
1118  static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1119  const uint64_t *Parts = 0;
1120
1121  switch (SrcVT.getSimpleVT()) {
1122  default:
1123    assert(false && "Unsupported UINT_TO_FP!");
1124  case MVT::i32:
1125    Parts = TwoE32;
1126    break;
1127  case MVT::i64:
1128    Parts = TwoE64;
1129    break;
1130  case MVT::i128:
1131    Parts = TwoE128;
1132    break;
1133  }
1134
1135  Lo = DAG.getNode(ISD::FADD, VT, Hi,
1136                   DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1137                                     MVT::ppcf128));
1138  Lo = DAG.getNode(ISD::SELECT_CC, VT, Src, DAG.getConstant(0, SrcVT), Lo, Hi,
1139                   DAG.getCondCode(ISD::SETLT));
1140  Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(1));
1141  Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, NVT, Lo, DAG.getIntPtrConstant(0));
1142}
1143
1144
1145//===----------------------------------------------------------------------===//
1146//  Float Operand Expansion
1147//===----------------------------------------------------------------------===//
1148
1149/// ExpandFloatOperand - This method is called when the specified operand of the
1150/// specified node is found to need expansion.  At this point, all of the result
1151/// types of the node are known to be legal, but other operands of the node may
1152/// need promotion or expansion as well as the specified one.
1153bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1154  DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n");
1155  SDValue Res = SDValue();
1156
1157  if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1158      == TargetLowering::Custom)
1159    Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1160
1161  if (Res.getNode() == 0) {
1162    switch (N->getOpcode()) {
1163    default:
1164  #ifndef NDEBUG
1165      cerr << "ExpandFloatOperand Op #" << OpNo << ": ";
1166      N->dump(&DAG); cerr << "\n";
1167  #endif
1168      assert(0 && "Do not know how to expand this operator's operand!");
1169      abort();
1170
1171    case ISD::BIT_CONVERT:     Res = ExpandOp_BIT_CONVERT(N); break;
1172    case ISD::BUILD_VECTOR:    Res = ExpandOp_BUILD_VECTOR(N); break;
1173    case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1174
1175    case ISD::BR_CC:      Res = ExpandFloatOp_BR_CC(N); break;
1176    case ISD::FP_ROUND:   Res = ExpandFloatOp_FP_ROUND(N); break;
1177    case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1178    case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1179    case ISD::SELECT_CC:  Res = ExpandFloatOp_SELECT_CC(N); break;
1180    case ISD::SETCC:      Res = ExpandFloatOp_SETCC(N); break;
1181    case ISD::STORE:      Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1182                                                    OpNo); break;
1183    }
1184  }
1185
1186  // If the result is null, the sub-method took care of registering results etc.
1187  if (!Res.getNode()) return false;
1188
1189  // If the result is N, the sub-method updated N in place.  Tell the legalizer
1190  // core about this.
1191  if (Res.getNode() == N)
1192    return true;
1193
1194  assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1195         "Invalid operand expansion");
1196
1197  ReplaceValueWith(SDValue(N, 0), Res);
1198  return false;
1199}
1200
1201/// FloatExpandSetCCOperands - Expand the operands of a comparison.  This code
1202/// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1203void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1204                                                SDValue &NewRHS,
1205                                                ISD::CondCode &CCCode) {
1206  SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1207  GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1208  GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1209
1210  MVT VT = NewLHS.getValueType();
1211  assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1212
1213  // FIXME:  This generated code sucks.  We want to generate
1214  //         FCMPU crN, hi1, hi2
1215  //         BNE crN, L:
1216  //         FCMPU crN, lo1, lo2
1217  // The following can be improved, but not that much.
1218  SDValue Tmp1, Tmp2, Tmp3;
1219  Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
1220                      LHSHi, RHSHi, ISD::SETOEQ);
1221  Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSLo.getValueType()),
1222                      LHSLo, RHSLo, CCCode);
1223  Tmp3 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1224  Tmp1 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
1225                      LHSHi, RHSHi, ISD::SETUNE);
1226  Tmp2 = DAG.getSetCC(TLI.getSetCCResultType(LHSHi.getValueType()),
1227                      LHSHi, RHSHi, CCCode);
1228  Tmp1 = DAG.getNode(ISD::AND, Tmp1.getValueType(), Tmp1, Tmp2);
1229  NewLHS = DAG.getNode(ISD::OR, Tmp1.getValueType(), Tmp1, Tmp3);
1230  NewRHS = SDValue();   // LHS is the result, not a compare.
1231}
1232
1233SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1234  SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1235  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1236  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1237
1238  // If ExpandSetCCOperands returned a scalar, we need to compare the result
1239  // against zero to select between true and false values.
1240  if (NewRHS.getNode() == 0) {
1241    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1242    CCCode = ISD::SETNE;
1243  }
1244
1245  // Update N to have the operands specified.
1246  return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1247                                DAG.getCondCode(CCCode), NewLHS, NewRHS,
1248                                N->getOperand(4));
1249}
1250
1251SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1252  assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1253         "Logic only correct for ppcf128!");
1254  SDValue Lo, Hi;
1255  GetExpandedFloat(N->getOperand(0), Lo, Hi);
1256  // Round it the rest of the way (e.g. to f32) if needed.
1257  return DAG.getNode(ISD::FP_ROUND, N->getValueType(0), Hi, N->getOperand(1));
1258}
1259
1260SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1261  MVT RVT = N->getValueType(0);
1262
1263  // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1264  // PPC (the libcall is not available).  FIXME: Do this in a less hacky way.
1265  if (RVT == MVT::i32) {
1266    assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1267           "Logic only correct for ppcf128!");
1268    SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, MVT::ppcf128,
1269                              N->getOperand(0), DAG.getValueType(MVT::f64));
1270    Res = DAG.getNode(ISD::FP_ROUND, MVT::f64, Res, DAG.getIntPtrConstant(1));
1271    return DAG.getNode(ISD::FP_TO_SINT, MVT::i32, Res);
1272  }
1273
1274  RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1275  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1276  return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false);
1277}
1278
1279SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1280  MVT RVT = N->getValueType(0);
1281
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    const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1288    APFloat APF = APFloat(APInt(128, 2, TwoE31));
1289    SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1290    //  X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1291    // FIXME: generated code sucks.
1292    return DAG.getNode(ISD::SELECT_CC, MVT::i32, N->getOperand(0), Tmp,
1293                       DAG.getNode(ISD::ADD, MVT::i32,
1294                                   DAG.getNode(ISD::FP_TO_SINT, MVT::i32,
1295                                               DAG.getNode(ISD::FSUB,
1296                                                           MVT::ppcf128,
1297                                                           N->getOperand(0),
1298                                                           Tmp)),
1299                                   DAG.getConstant(0x80000000, MVT::i32)),
1300                       DAG.getNode(ISD::FP_TO_SINT, MVT::i32, N->getOperand(0)),
1301                       DAG.getCondCode(ISD::SETGE));
1302  }
1303
1304  RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1305  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1306  return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false);
1307}
1308
1309SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1310  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1311  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1312  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1313
1314  // If ExpandSetCCOperands returned a scalar, we need to compare the result
1315  // against zero to select between true and false values.
1316  if (NewRHS.getNode() == 0) {
1317    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1318    CCCode = ISD::SETNE;
1319  }
1320
1321  // Update N to have the operands specified.
1322  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1323                                N->getOperand(2), N->getOperand(3),
1324                                DAG.getCondCode(CCCode));
1325}
1326
1327SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1328  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1329  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1330  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode);
1331
1332  // If ExpandSetCCOperands returned a scalar, use it.
1333  if (NewRHS.getNode() == 0) {
1334    assert(NewLHS.getValueType() == N->getValueType(0) &&
1335           "Unexpected setcc expansion!");
1336    return NewLHS;
1337  }
1338
1339  // Otherwise, update N to have the operands specified.
1340  return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1341                                DAG.getCondCode(CCCode));
1342}
1343
1344SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1345  if (ISD::isNormalStore(N))
1346    return ExpandOp_NormalStore(N, OpNo);
1347
1348  assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1349  assert(OpNo == 1 && "Can only expand the stored value so far");
1350  StoreSDNode *ST = cast<StoreSDNode>(N);
1351
1352  SDValue Chain = ST->getChain();
1353  SDValue Ptr = ST->getBasePtr();
1354
1355  MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType());
1356  assert(NVT.isByteSized() && "Expanded type not byte sized!");
1357  assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1358
1359  SDValue Lo, Hi;
1360  GetExpandedOp(ST->getValue(), Lo, Hi);
1361
1362  return DAG.getTruncStore(Chain, Hi, Ptr,
1363                           ST->getSrcValue(), ST->getSrcValueOffset(),
1364                           ST->getMemoryVT(),
1365                           ST->isVolatile(), ST->getAlignment());
1366}
1367