1139804Simp//===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
21541Srgrimes//
31541Srgrimes//                     The LLVM Compiler Infrastructure
41541Srgrimes//
51541Srgrimes// This file is distributed under the University of Illinois Open Source
61541Srgrimes// License. See LICENSE.TXT for details.
71541Srgrimes//
81541Srgrimes//===----------------------------------------------------------------------===//
91541Srgrimes//
101541Srgrimes// This file implements float type expansion and softening for LegalizeTypes.
111541Srgrimes// Softening is the act of turning a computation in an illegal floating point
121541Srgrimes// type into a computation in an integer type of the same size; also known as
131541Srgrimes// "soft float".  For example, turning f32 arithmetic into operations using i32.
141541Srgrimes// The resulting integer value is the same as what you would get by performing
151541Srgrimes// the floating point operation and bitcasting the result to the integer type.
161541Srgrimes// Expansion is the act of changing a computation in an illegal type to be a
171541Srgrimes// computation in two identical registers of a smaller type.  For example,
181541Srgrimes// implementing ppcf128 arithmetic in two f64 registers.
191541Srgrimes//
201541Srgrimes//===----------------------------------------------------------------------===//
211541Srgrimes
221541Srgrimes#include "LegalizeTypes.h"
231541Srgrimes#include "llvm/Support/ErrorHandling.h"
241541Srgrimes#include "llvm/Support/raw_ostream.h"
251541Srgrimesusing namespace llvm;
261541Srgrimes
271541Srgrimes/// GetFPLibCall - Return the right libcall for the given floating point type.
281541Srgrimesstatic RTLIB::Libcall GetFPLibCall(EVT VT,
291541Srgrimes                                   RTLIB::Libcall Call_F32,
301541Srgrimes                                   RTLIB::Libcall Call_F64,
311541Srgrimes                                   RTLIB::Libcall Call_F80,
321541Srgrimes                                   RTLIB::Libcall Call_F128,
331541Srgrimes                                   RTLIB::Libcall Call_PPCF128) {
341541Srgrimes  return
351541Srgrimes    VT == MVT::f32 ? Call_F32 :
36116182Sobrien    VT == MVT::f64 ? Call_F64 :
37116182Sobrien    VT == MVT::f80 ? Call_F80 :
38116182Sobrien    VT == MVT::f128 ? Call_F128 :
391541Srgrimes    VT == MVT::ppcf128 ? Call_PPCF128 :
401541Srgrimes    RTLIB::UNKNOWN_LIBCALL;
4112577Sbde}
421541Srgrimes
431541Srgrimes//===----------------------------------------------------------------------===//
4424206Sbde//  Result Float to Integer Conversion.
4524206Sbde//===----------------------------------------------------------------------===//
461541Srgrimes
473308Sphkvoid DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
4812517Sjulian  DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
4929357Speter        dbgs() << "\n");
5041086Struckman  SDValue R = SDValue();
5170069Sjhb
5212517Sjulian  switch (N->getOpcode()) {
531541Srgrimes  default:
541541Srgrimes#ifndef NDEBUG
551541Srgrimes    dbgs() << "SoftenFloatResult #" << ResNo << ": ";
561541Srgrimes    N->dump(&DAG); dbgs() << "\n";
5712675Sjulian#endif
5812675Sjulian    llvm_unreachable("Do not know how to soften the result of this operator!");
5912675Sjulian
6012675Sjulian    case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
6129357Speter    case ISD::BITCAST:     R = SoftenFloatRes_BITCAST(N); break;
62230866Skib    case ISD::BUILD_PAIR:  R = SoftenFloatRes_BUILD_PAIR(N); break;
6312675Sjulian    case ISD::ConstantFP:
6470069Sjhb      R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
6570069Sjhb      break;
6647625Sphk    case ISD::EXTRACT_VECTOR_ELT:
67126080Sphk      R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
68111815Sphk    case ISD::FABS:        R = SoftenFloatRes_FABS(N); break;
69111815Sphk    case ISD::FADD:        R = SoftenFloatRes_FADD(N); break;
70111815Sphk    case ISD::FCEIL:       R = SoftenFloatRes_FCEIL(N); break;
71111815Sphk    case ISD::FCOPYSIGN:   R = SoftenFloatRes_FCOPYSIGN(N); break;
72111815Sphk    case ISD::FCOS:        R = SoftenFloatRes_FCOS(N); break;
73230866Skib    case ISD::FDIV:        R = SoftenFloatRes_FDIV(N); break;
74111815Sphk    case ISD::FEXP:        R = SoftenFloatRes_FEXP(N); break;
7547625Sphk    case ISD::FEXP2:       R = SoftenFloatRes_FEXP2(N); break;
7612675Sjulian    case ISD::FFLOOR:      R = SoftenFloatRes_FFLOOR(N); break;
77230866Skib    case ISD::FLOG:        R = SoftenFloatRes_FLOG(N); break;
78230866Skib    case ISD::FLOG2:       R = SoftenFloatRes_FLOG2(N); break;
79230866Skib    case ISD::FLOG10:      R = SoftenFloatRes_FLOG10(N); break;
80230866Skib    case ISD::FMA:         R = SoftenFloatRes_FMA(N); break;
81230866Skib    case ISD::FMUL:        R = SoftenFloatRes_FMUL(N); break;
82230866Skib    case ISD::FNEARBYINT:  R = SoftenFloatRes_FNEARBYINT(N); break;
83230866Skib    case ISD::FNEG:        R = SoftenFloatRes_FNEG(N); break;
84230866Skib    case ISD::FP_EXTEND:   R = SoftenFloatRes_FP_EXTEND(N); break;
85230866Skib    case ISD::FP_ROUND:    R = SoftenFloatRes_FP_ROUND(N); break;
86230866Skib    case ISD::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(N); break;
8712819Sphk    case ISD::FPOW:        R = SoftenFloatRes_FPOW(N); break;
881541Srgrimes    case ISD::FPOWI:       R = SoftenFloatRes_FPOWI(N); break;
891541Srgrimes    case ISD::FREM:        R = SoftenFloatRes_FREM(N); break;
9041087Struckman    case ISD::FRINT:       R = SoftenFloatRes_FRINT(N); break;
9170069Sjhb    case ISD::FROUND:      R = SoftenFloatRes_FROUND(N); break;
921541Srgrimes    case ISD::FSIN:        R = SoftenFloatRes_FSIN(N); break;
931541Srgrimes    case ISD::FSQRT:       R = SoftenFloatRes_FSQRT(N); break;
94198860Sed    case ISD::FSUB:        R = SoftenFloatRes_FSUB(N); break;
95198860Sed    case ISD::FTRUNC:      R = SoftenFloatRes_FTRUNC(N); break;
96198860Sed    case ISD::LOAD:        R = SoftenFloatRes_LOAD(N); break;
97198860Sed    case ISD::SELECT:      R = SoftenFloatRes_SELECT(N); break;
981541Srgrimes    case ISD::SELECT_CC:   R = SoftenFloatRes_SELECT_CC(N); break;
9970069Sjhb    case ISD::SINT_TO_FP:
10070069Sjhb    case ISD::UINT_TO_FP:  R = SoftenFloatRes_XINT_TO_FP(N); break;
10170069Sjhb    case ISD::UNDEF:       R = SoftenFloatRes_UNDEF(N); break;
10270069Sjhb    case ISD::VAARG:       R = SoftenFloatRes_VAARG(N); break;
10370069Sjhb  }
1041541Srgrimes
10512675Sjulian  // If R is null, the sub-method took care of registering the result.
106130585Sphk  if (R.getNode())
1071541Srgrimes    SetSoftenedFloat(SDValue(N, ResNo), R);
108198860Sed}
109116634Sbmilekic
110116634SbmilekicSDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
111116634Sbmilekic  return BitConvertToInteger(N->getOperand(0));
112116634Sbmilekic}
113198860Sed
114198860SedSDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
115198860Sed                                                      unsigned ResNo) {
116198860Sed  SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
117198860Sed  return BitConvertToInteger(Op);
118198860Sed}
119198860Sed
120247798SdavideSDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
121247798Sdavide  // Convert the inputs to integers, and build a new pair out of them.
122198860Sed  return DAG.getNode(ISD::BUILD_PAIR, SDLoc(N),
123198860Sed                     TLI.getTypeToTransformTo(*DAG.getContext(),
124198860Sed                                              N->getValueType(0)),
1251541Srgrimes                     BitConvertToInteger(N->getOperand(0)),
1261541Srgrimes                     BitConvertToInteger(N->getOperand(1)));
1271541Srgrimes}
1281541Srgrimes
12912675SjulianSDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
130130585Sphk  return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
1311541Srgrimes                         TLI.getTypeToTransformTo(*DAG.getContext(),
1321541Srgrimes                                                  N->getValueType(0)));
133198860Sed}
134198860Sed
135198860SedSDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
13670069Sjhb  SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
1371541Srgrimes  return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
138198860Sed                     NewOp.getValueType().getVectorElementType(),
139198860Sed                     NewOp, N->getOperand(1));
140198860Sed}
1411541Srgrimes
1421541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
1431541Srgrimes  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1441541Srgrimes  unsigned Size = NVT.getSizeInBits();
14512675Sjulian
146130585Sphk  // Mask = ~(1 << (Size-1))
1471541Srgrimes  APInt API = APInt::getAllOnesValue(Size);
148116660Siedowse  API.clearBit(Size-1);
14969741Sphk  SDValue Mask = DAG.getConstant(API, NVT);
150198860Sed  SDValue Op = GetSoftenedFloat(N->getOperand(0));
1511541Srgrimes  return DAG.getNode(ISD::AND, SDLoc(N), NVT, Op, Mask);
152198860Sed}
153116660Siedowse
1541541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
155198860Sed  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1561541Srgrimes  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
1571541Srgrimes                     GetSoftenedFloat(N->getOperand(1)) };
158198860Sed  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
159198860Sed                                           RTLIB::ADD_F32,
1601541Srgrimes                                           RTLIB::ADD_F64,
1611541Srgrimes                                           RTLIB::ADD_F80,
1621541Srgrimes                                           RTLIB::ADD_F128,
1631541Srgrimes                                           RTLIB::ADD_PPCF128),
1641541Srgrimes                         NVT, Ops, 2, false, SDLoc(N)).first;
165116660Siedowse}
166116660Siedowse
1671541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
1681541Srgrimes  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
169198860Sed  SDValue Op = GetSoftenedFloat(N->getOperand(0));
170116660Siedowse  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
171198860Sed                                           RTLIB::CEIL_F32,
172198860Sed                                           RTLIB::CEIL_F64,
173198860Sed                                           RTLIB::CEIL_F80,
1741541Srgrimes                                           RTLIB::CEIL_F128,
175198860Sed                                           RTLIB::CEIL_PPCF128),
1761541Srgrimes                         NVT, &Op, 1, false, SDLoc(N)).first;
1771541Srgrimes}
1781541Srgrimes
1791541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
18012675Sjulian  SDValue LHS = GetSoftenedFloat(N->getOperand(0));
181130585Sphk  SDValue RHS = BitConvertToInteger(N->getOperand(1));
1821541Srgrimes  SDLoc dl(N);
18329357Speter
1841541Srgrimes  EVT LVT = LHS.getValueType();
18546568Speter  EVT RVT = RHS.getValueType();
186198860Sed
187116660Siedowse  unsigned LSize = LVT.getSizeInBits();
18829357Speter  unsigned RSize = RVT.getSizeInBits();
18929357Speter
19083805Sjhb  // First get the sign bit of second operand.
191198860Sed  SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
19246568Speter                                  DAG.getConstant(RSize - 1,
19329357Speter                                                  TLI.getShiftAmountTy(RVT)));
1941541Srgrimes  SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
1951541Srgrimes
196230866Skib  // Shift right or sign-extend it if the two operands have different types.
197230866Skib  int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
198230866Skib  if (SizeDiff > 0) {
199230866Skib    SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
200230866Skib                          DAG.getConstant(SizeDiff,
201230866Skib                                 TLI.getShiftAmountTy(SignBit.getValueType())));
202230866Skib    SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
203230866Skib  } else if (SizeDiff < 0) {
204230866Skib    SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
205230866Skib    SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
206230866Skib                          DAG.getConstant(-SizeDiff,
207230866Skib                                 TLI.getShiftAmountTy(SignBit.getValueType())));
208230866Skib  }
209230866Skib
210230866Skib  // Clear the sign bit of the first operand.
211230866Skib  SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
212230866Skib                               DAG.getConstant(LSize - 1,
213230866Skib                                               TLI.getShiftAmountTy(LVT)));
214230866Skib  Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
215230866Skib  LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
216230866Skib
217230866Skib  // Or the value with the sign bit.
218230866Skib  return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
219230866Skib}
220230866Skib
22170069SjhbSDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
222230866Skib  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
223230866Skib  SDValue Op = GetSoftenedFloat(N->getOperand(0));
224230866Skib  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
225230866Skib                                           RTLIB::COS_F32,
226230866Skib                                           RTLIB::COS_F64,
227230866Skib                                           RTLIB::COS_F80,
228230866Skib                                           RTLIB::COS_F128,
229230866Skib                                           RTLIB::COS_PPCF128),
230230866Skib                         NVT, &Op, 1, false, SDLoc(N)).first;
23170069Sjhb}
23270069Sjhb
23370069SjhbSDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
23477057Sphk  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
23570069Sjhb  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
236247798Sdavide                     GetSoftenedFloat(N->getOperand(1)) };
237247798Sdavide  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
23870239Sphk                                           RTLIB::DIV_F32,
239122352Stanimura                                           RTLIB::DIV_F64,
240230866Skib                                           RTLIB::DIV_F80,
24141086Struckman                                           RTLIB::DIV_F128,
24295883Salfred                                           RTLIB::DIV_PPCF128),
243198860Sed                         NVT, Ops, 2, false, SDLoc(N)).first;
244247798Sdavide}
245247798Sdavide
246247798SdavideSDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
247247798Sdavide  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
248247798Sdavide  SDValue Op = GetSoftenedFloat(N->getOperand(0));
249247798Sdavide  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
250247798Sdavide                                           RTLIB::EXP_F32,
2511541Srgrimes                                           RTLIB::EXP_F64,
2521541Srgrimes                                           RTLIB::EXP_F80,
2531541Srgrimes                                           RTLIB::EXP_F128,
25412675Sjulian                                           RTLIB::EXP_PPCF128),
255130585Sphk                         NVT, &Op, 1, false, SDLoc(N)).first;
2561541Srgrimes}
2571541Srgrimes
2581541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
2591541Srgrimes  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2601541Srgrimes  SDValue Op = GetSoftenedFloat(N->getOperand(0));
2611541Srgrimes  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
262116660Siedowse                                           RTLIB::EXP2_F32,
2631541Srgrimes                                           RTLIB::EXP2_F64,
2641541Srgrimes                                           RTLIB::EXP2_F80,
2651541Srgrimes                                           RTLIB::EXP2_F128,
2661541Srgrimes                                           RTLIB::EXP2_PPCF128),
2671541Srgrimes                         NVT, &Op, 1, false, SDLoc(N)).first;
2681541Srgrimes}
269198860Sed
2701541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
2711541Srgrimes  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2721541Srgrimes  SDValue Op = GetSoftenedFloat(N->getOperand(0));
2731541Srgrimes  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
274198860Sed                                           RTLIB::FLOOR_F32,
2751541Srgrimes                                           RTLIB::FLOOR_F64,
2761541Srgrimes                                           RTLIB::FLOOR_F80,
27741086Struckman                                           RTLIB::FLOOR_F128,
27841086Struckman                                           RTLIB::FLOOR_PPCF128),
27941086Struckman                         NVT, &Op, 1, false, SDLoc(N)).first;
28041086Struckman}
281104393Struckman
2821541SrgrimesSDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
2831541Srgrimes  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
28441086Struckman  SDValue Op = GetSoftenedFloat(N->getOperand(0));
28541086Struckman  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
28641086Struckman                                           RTLIB::LOG_F32,
28741086Struckman                                           RTLIB::LOG_F64,
28841086Struckman                                           RTLIB::LOG_F80,
2891541Srgrimes                                           RTLIB::LOG_F128,
290104393Struckman                                           RTLIB::LOG_PPCF128),
2911541Srgrimes                         NVT, &Op, 1, false, SDLoc(N)).first;
2921541Srgrimes}
2931541Srgrimes
2948161SjkhSDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
2951541Srgrimes  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2961541Srgrimes  SDValue Op = GetSoftenedFloat(N->getOperand(0));
2971541Srgrimes  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
29812517Sjulian                                           RTLIB::LOG2_F32,
29912675Sjulian                                           RTLIB::LOG2_F64,
30069741Sphk                                           RTLIB::LOG2_F80,
30112517Sjulian                                           RTLIB::LOG2_F128,
30269741Sphk                                           RTLIB::LOG2_PPCF128),
303198860Sed                         NVT, &Op, 1, false, SDLoc(N)).first;
304198860Sed}
305230866Skib
306216952SkibSDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
307216952Skib  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
30812517Sjulian  SDValue Op = GetSoftenedFloat(N->getOperand(0));
30912517Sjulian  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
310177253Srwatson                                           RTLIB::LOG10_F32,
311                                           RTLIB::LOG10_F64,
312                                           RTLIB::LOG10_F80,
313                                           RTLIB::LOG10_F128,
314                                           RTLIB::LOG10_PPCF128),
315                         NVT, &Op, 1, false, SDLoc(N)).first;
316}
317
318SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
319  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
320  SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
321                     GetSoftenedFloat(N->getOperand(1)),
322                     GetSoftenedFloat(N->getOperand(2)) };
323  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
324                                           RTLIB::FMA_F32,
325                                           RTLIB::FMA_F64,
326                                           RTLIB::FMA_F80,
327                                           RTLIB::FMA_F128,
328                                           RTLIB::FMA_PPCF128),
329                         NVT, Ops, 3, false, SDLoc(N)).first;
330}
331
332SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
333  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
334  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
335                     GetSoftenedFloat(N->getOperand(1)) };
336  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
337                                           RTLIB::MUL_F32,
338                                           RTLIB::MUL_F64,
339                                           RTLIB::MUL_F80,
340                                           RTLIB::MUL_F128,
341                                           RTLIB::MUL_PPCF128),
342                         NVT, Ops, 2, false, SDLoc(N)).first;
343}
344
345SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
346  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
347  SDValue Op = GetSoftenedFloat(N->getOperand(0));
348  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
349                                           RTLIB::NEARBYINT_F32,
350                                           RTLIB::NEARBYINT_F64,
351                                           RTLIB::NEARBYINT_F80,
352                                           RTLIB::NEARBYINT_F128,
353                                           RTLIB::NEARBYINT_PPCF128),
354                         NVT, &Op, 1, false, SDLoc(N)).first;
355}
356
357SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
358  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
359  // Expand Y = FNEG(X) -> Y = SUB -0.0, X
360  SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
361                     GetSoftenedFloat(N->getOperand(0)) };
362  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
363                                           RTLIB::SUB_F32,
364                                           RTLIB::SUB_F64,
365                                           RTLIB::SUB_F80,
366                                           RTLIB::SUB_F128,
367                                           RTLIB::SUB_PPCF128),
368                         NVT, Ops, 2, false, SDLoc(N)).first;
369}
370
371SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
372  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
373  SDValue Op = N->getOperand(0);
374  RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
375  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
376  return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
377}
378
379// FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
380// nodes?
381SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
382  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
383  SDValue Op = N->getOperand(0);
384  return TLI.makeLibCall(DAG, RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false,
385                         SDLoc(N)).first;
386}
387
388SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
389  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
390  SDValue Op = N->getOperand(0);
391  RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
392  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
393  return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
394}
395
396SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
397  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
398  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
399                     GetSoftenedFloat(N->getOperand(1)) };
400  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
401                                           RTLIB::POW_F32,
402                                           RTLIB::POW_F64,
403                                           RTLIB::POW_F80,
404                                           RTLIB::POW_F128,
405                                           RTLIB::POW_PPCF128),
406                         NVT, Ops, 2, false, SDLoc(N)).first;
407}
408
409SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
410  assert(N->getOperand(1).getValueType() == MVT::i32 &&
411         "Unsupported power type!");
412  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
413  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
414  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
415                                           RTLIB::POWI_F32,
416                                           RTLIB::POWI_F64,
417                                           RTLIB::POWI_F80,
418                                           RTLIB::POWI_F128,
419                                           RTLIB::POWI_PPCF128),
420                         NVT, Ops, 2, false, SDLoc(N)).first;
421}
422
423SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
424  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
425  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
426                     GetSoftenedFloat(N->getOperand(1)) };
427  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
428                                           RTLIB::REM_F32,
429                                           RTLIB::REM_F64,
430                                           RTLIB::REM_F80,
431                                           RTLIB::REM_F128,
432                                           RTLIB::REM_PPCF128),
433                         NVT, Ops, 2, false, SDLoc(N)).first;
434}
435
436SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
437  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
438  SDValue Op = GetSoftenedFloat(N->getOperand(0));
439  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
440                                           RTLIB::RINT_F32,
441                                           RTLIB::RINT_F64,
442                                           RTLIB::RINT_F80,
443                                           RTLIB::RINT_F128,
444                                           RTLIB::RINT_PPCF128),
445                         NVT, &Op, 1, false, SDLoc(N)).first;
446}
447
448SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
449  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
450  SDValue Op = GetSoftenedFloat(N->getOperand(0));
451  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
452                                           RTLIB::ROUND_F32,
453                                           RTLIB::ROUND_F64,
454                                           RTLIB::ROUND_F80,
455                                           RTLIB::ROUND_F128,
456                                           RTLIB::ROUND_PPCF128),
457                         NVT, &Op, 1, false, SDLoc(N)).first;
458}
459
460SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
461  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
462  SDValue Op = GetSoftenedFloat(N->getOperand(0));
463  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
464                                           RTLIB::SIN_F32,
465                                           RTLIB::SIN_F64,
466                                           RTLIB::SIN_F80,
467                                           RTLIB::SIN_F128,
468                                           RTLIB::SIN_PPCF128),
469                         NVT, &Op, 1, false, SDLoc(N)).first;
470}
471
472SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
473  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
474  SDValue Op = GetSoftenedFloat(N->getOperand(0));
475  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
476                                           RTLIB::SQRT_F32,
477                                           RTLIB::SQRT_F64,
478                                           RTLIB::SQRT_F80,
479                                           RTLIB::SQRT_F128,
480                                           RTLIB::SQRT_PPCF128),
481                         NVT, &Op, 1, false, SDLoc(N)).first;
482}
483
484SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
485  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
486  SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
487                     GetSoftenedFloat(N->getOperand(1)) };
488  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
489                                           RTLIB::SUB_F32,
490                                           RTLIB::SUB_F64,
491                                           RTLIB::SUB_F80,
492                                           RTLIB::SUB_F128,
493                                           RTLIB::SUB_PPCF128),
494                         NVT, Ops, 2, false, SDLoc(N)).first;
495}
496
497SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
498  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
499  SDValue Op = GetSoftenedFloat(N->getOperand(0));
500  return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
501                                           RTLIB::TRUNC_F32,
502                                           RTLIB::TRUNC_F64,
503                                           RTLIB::TRUNC_F80,
504                                           RTLIB::TRUNC_F128,
505                                           RTLIB::TRUNC_PPCF128),
506                         NVT, &Op, 1, false, SDLoc(N)).first;
507}
508
509SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
510  LoadSDNode *L = cast<LoadSDNode>(N);
511  EVT VT = N->getValueType(0);
512  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
513  SDLoc dl(N);
514
515  SDValue NewL;
516  if (L->getExtensionType() == ISD::NON_EXTLOAD) {
517    NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
518                       NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
519                       L->getPointerInfo(), NVT, L->isVolatile(),
520                       L->isNonTemporal(), false, L->getAlignment(),
521                       L->getTBAAInfo());
522    // Legalized the chain result - switch anything that used the old chain to
523    // use the new one.
524    ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
525    return NewL;
526  }
527
528  // Do a non-extending load followed by FP_EXTEND.
529  NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
530                     L->getMemoryVT(), dl, L->getChain(),
531                     L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
532                     L->getMemoryVT(), L->isVolatile(),
533                     L->isNonTemporal(), false, L->getAlignment(),
534                     L->getTBAAInfo());
535  // Legalized the chain result - switch anything that used the old chain to
536  // use the new one.
537  ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
538  return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
539}
540
541SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
542  SDValue LHS = GetSoftenedFloat(N->getOperand(1));
543  SDValue RHS = GetSoftenedFloat(N->getOperand(2));
544  return DAG.getSelect(SDLoc(N),
545                       LHS.getValueType(), N->getOperand(0), LHS, RHS);
546}
547
548SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
549  SDValue LHS = GetSoftenedFloat(N->getOperand(2));
550  SDValue RHS = GetSoftenedFloat(N->getOperand(3));
551  return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
552                     LHS.getValueType(), N->getOperand(0),
553                     N->getOperand(1), LHS, RHS, N->getOperand(4));
554}
555
556SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
557  return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
558                                               N->getValueType(0)));
559}
560
561SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
562  SDValue Chain = N->getOperand(0); // Get the chain.
563  SDValue Ptr = N->getOperand(1); // Get the pointer.
564  EVT VT = N->getValueType(0);
565  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
566  SDLoc dl(N);
567
568  SDValue NewVAARG;
569  NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
570                          N->getConstantOperandVal(3));
571
572  // Legalized the chain result - switch anything that used the old chain to
573  // use the new one.
574  ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
575  return NewVAARG;
576}
577
578SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
579  bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
580  EVT SVT = N->getOperand(0).getValueType();
581  EVT RVT = N->getValueType(0);
582  EVT NVT = EVT();
583  SDLoc dl(N);
584
585  // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
586  // a larger type, eg: i8 -> fp.  Even if it is legal, no libcall may exactly
587  // match.  Look for an appropriate libcall.
588  RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
589  for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
590       t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
591    NVT = (MVT::SimpleValueType)t;
592    // The source needs to big enough to hold the operand.
593    if (NVT.bitsGE(SVT))
594      LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
595  }
596  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
597
598  // Sign/zero extend the argument if the libcall takes a larger type.
599  SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
600                           NVT, N->getOperand(0));
601  return TLI.makeLibCall(DAG, LC,
602                         TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
603                         &Op, 1, false, dl).first;
604}
605
606
607//===----------------------------------------------------------------------===//
608//  Operand Float to Integer Conversion..
609//===----------------------------------------------------------------------===//
610
611bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
612  DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
613        dbgs() << "\n");
614  SDValue Res = SDValue();
615
616  switch (N->getOpcode()) {
617  default:
618#ifndef NDEBUG
619    dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
620    N->dump(&DAG); dbgs() << "\n";
621#endif
622    llvm_unreachable("Do not know how to soften this operator's operand!");
623
624  case ISD::BITCAST:     Res = SoftenFloatOp_BITCAST(N); break;
625  case ISD::BR_CC:       Res = SoftenFloatOp_BR_CC(N); break;
626  case ISD::FP_ROUND:    Res = SoftenFloatOp_FP_ROUND(N); break;
627  case ISD::FP_TO_SINT:  Res = SoftenFloatOp_FP_TO_SINT(N); break;
628  case ISD::FP_TO_UINT:  Res = SoftenFloatOp_FP_TO_UINT(N); break;
629  case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
630  case ISD::SELECT_CC:   Res = SoftenFloatOp_SELECT_CC(N); break;
631  case ISD::SETCC:       Res = SoftenFloatOp_SETCC(N); break;
632  case ISD::STORE:       Res = SoftenFloatOp_STORE(N, OpNo); break;
633  }
634
635  // If the result is null, the sub-method took care of registering results etc.
636  if (!Res.getNode()) return false;
637
638  // If the result is N, the sub-method updated N in place.  Tell the legalizer
639  // core about this.
640  if (Res.getNode() == N)
641    return true;
642
643  assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
644         "Invalid operand expansion");
645
646  ReplaceValueWith(SDValue(N, 0), Res);
647  return false;
648}
649
650SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
651  return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
652                     GetSoftenedFloat(N->getOperand(0)));
653}
654
655SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
656  EVT SVT = N->getOperand(0).getValueType();
657  EVT RVT = N->getValueType(0);
658
659  RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
660  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
661
662  SDValue Op = GetSoftenedFloat(N->getOperand(0));
663  return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
664}
665
666SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
667  SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
668  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
669
670  EVT VT = NewLHS.getValueType();
671  NewLHS = GetSoftenedFloat(NewLHS);
672  NewRHS = GetSoftenedFloat(NewRHS);
673  TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
674
675  // If softenSetCCOperands returned a scalar, we need to compare the result
676  // against zero to select between true and false values.
677  if (NewRHS.getNode() == 0) {
678    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
679    CCCode = ISD::SETNE;
680  }
681
682  // Update N to have the operands specified.
683  return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
684                                DAG.getCondCode(CCCode), NewLHS, NewRHS,
685                                N->getOperand(4)),
686                 0);
687}
688
689SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
690  EVT RVT = N->getValueType(0);
691  RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
692  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
693  SDValue Op = GetSoftenedFloat(N->getOperand(0));
694  return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
695}
696
697SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
698  EVT RVT = N->getValueType(0);
699  RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
700  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
701  SDValue Op = GetSoftenedFloat(N->getOperand(0));
702  return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
703}
704
705SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
706  EVT RVT = N->getValueType(0);
707  RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
708  SDValue Op = GetSoftenedFloat(N->getOperand(0));
709  return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
710}
711
712SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
713  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
714  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
715
716  EVT VT = NewLHS.getValueType();
717  NewLHS = GetSoftenedFloat(NewLHS);
718  NewRHS = GetSoftenedFloat(NewRHS);
719  TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
720
721  // If softenSetCCOperands returned a scalar, we need to compare the result
722  // against zero to select between true and false values.
723  if (NewRHS.getNode() == 0) {
724    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
725    CCCode = ISD::SETNE;
726  }
727
728  // Update N to have the operands specified.
729  return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
730                                N->getOperand(2), N->getOperand(3),
731                                DAG.getCondCode(CCCode)),
732                 0);
733}
734
735SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
736  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
737  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
738
739  EVT VT = NewLHS.getValueType();
740  NewLHS = GetSoftenedFloat(NewLHS);
741  NewRHS = GetSoftenedFloat(NewRHS);
742  TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
743
744  // If softenSetCCOperands returned a scalar, use it.
745  if (NewRHS.getNode() == 0) {
746    assert(NewLHS.getValueType() == N->getValueType(0) &&
747           "Unexpected setcc expansion!");
748    return NewLHS;
749  }
750
751  // Otherwise, update N to have the operands specified.
752  return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
753                                DAG.getCondCode(CCCode)),
754                 0);
755}
756
757SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
758  assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
759  assert(OpNo == 1 && "Can only soften the stored value!");
760  StoreSDNode *ST = cast<StoreSDNode>(N);
761  SDValue Val = ST->getValue();
762  SDLoc dl(N);
763
764  if (ST->isTruncatingStore())
765    // Do an FP_ROUND followed by a non-truncating store.
766    Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
767                                          Val, DAG.getIntPtrConstant(0)));
768  else
769    Val = GetSoftenedFloat(Val);
770
771  return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
772                      ST->getMemOperand());
773}
774
775
776//===----------------------------------------------------------------------===//
777//  Float Result Expansion
778//===----------------------------------------------------------------------===//
779
780/// ExpandFloatResult - This method is called when the specified result of the
781/// specified node is found to need expansion.  At this point, the node may also
782/// have invalid operands or may have other results that need promotion, we just
783/// know that (at least) one result needs expansion.
784void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
785  DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
786  SDValue Lo, Hi;
787  Lo = Hi = SDValue();
788
789  // See if the target wants to custom expand this node.
790  if (CustomLowerNode(N, N->getValueType(ResNo), true))
791    return;
792
793  switch (N->getOpcode()) {
794  default:
795#ifndef NDEBUG
796    dbgs() << "ExpandFloatResult #" << ResNo << ": ";
797    N->dump(&DAG); dbgs() << "\n";
798#endif
799    llvm_unreachable("Do not know how to expand the result of this operator!");
800
801  case ISD::UNDEF:        SplitRes_UNDEF(N, Lo, Hi); break;
802  case ISD::SELECT:       SplitRes_SELECT(N, Lo, Hi); break;
803  case ISD::SELECT_CC:    SplitRes_SELECT_CC(N, Lo, Hi); break;
804
805  case ISD::MERGE_VALUES:       ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
806  case ISD::BITCAST:            ExpandRes_BITCAST(N, Lo, Hi); break;
807  case ISD::BUILD_PAIR:         ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
808  case ISD::EXTRACT_ELEMENT:    ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
809  case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
810  case ISD::VAARG:              ExpandRes_VAARG(N, Lo, Hi); break;
811
812  case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
813  case ISD::FABS:       ExpandFloatRes_FABS(N, Lo, Hi); break;
814  case ISD::FADD:       ExpandFloatRes_FADD(N, Lo, Hi); break;
815  case ISD::FCEIL:      ExpandFloatRes_FCEIL(N, Lo, Hi); break;
816  case ISD::FCOPYSIGN:  ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
817  case ISD::FCOS:       ExpandFloatRes_FCOS(N, Lo, Hi); break;
818  case ISD::FDIV:       ExpandFloatRes_FDIV(N, Lo, Hi); break;
819  case ISD::FEXP:       ExpandFloatRes_FEXP(N, Lo, Hi); break;
820  case ISD::FEXP2:      ExpandFloatRes_FEXP2(N, Lo, Hi); break;
821  case ISD::FFLOOR:     ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
822  case ISD::FLOG:       ExpandFloatRes_FLOG(N, Lo, Hi); break;
823  case ISD::FLOG2:      ExpandFloatRes_FLOG2(N, Lo, Hi); break;
824  case ISD::FLOG10:     ExpandFloatRes_FLOG10(N, Lo, Hi); break;
825  case ISD::FMA:        ExpandFloatRes_FMA(N, Lo, Hi); break;
826  case ISD::FMUL:       ExpandFloatRes_FMUL(N, Lo, Hi); break;
827  case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
828  case ISD::FNEG:       ExpandFloatRes_FNEG(N, Lo, Hi); break;
829  case ISD::FP_EXTEND:  ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
830  case ISD::FPOW:       ExpandFloatRes_FPOW(N, Lo, Hi); break;
831  case ISD::FPOWI:      ExpandFloatRes_FPOWI(N, Lo, Hi); break;
832  case ISD::FRINT:      ExpandFloatRes_FRINT(N, Lo, Hi); break;
833  case ISD::FROUND:     ExpandFloatRes_FROUND(N, Lo, Hi); break;
834  case ISD::FSIN:       ExpandFloatRes_FSIN(N, Lo, Hi); break;
835  case ISD::FSQRT:      ExpandFloatRes_FSQRT(N, Lo, Hi); break;
836  case ISD::FSUB:       ExpandFloatRes_FSUB(N, Lo, Hi); break;
837  case ISD::FTRUNC:     ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
838  case ISD::LOAD:       ExpandFloatRes_LOAD(N, Lo, Hi); break;
839  case ISD::SINT_TO_FP:
840  case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
841  case ISD::FREM:       ExpandFloatRes_FREM(N, Lo, Hi); break;
842  }
843
844  // If Lo/Hi is null, the sub-method took care of registering results etc.
845  if (Lo.getNode())
846    SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
847}
848
849void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
850                                                 SDValue &Hi) {
851  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
852  assert(NVT.getSizeInBits() == integerPartWidth &&
853         "Do not know how to expand this float constant!");
854  APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
855  Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
856                                 APInt(integerPartWidth, C.getRawData()[1])),
857                         NVT);
858  Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
859                                 APInt(integerPartWidth, C.getRawData()[0])),
860                         NVT);
861}
862
863void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
864                                           SDValue &Hi) {
865  assert(N->getValueType(0) == MVT::ppcf128 &&
866         "Logic only correct for ppcf128!");
867  SDLoc dl(N);
868  SDValue Tmp;
869  GetExpandedFloat(N->getOperand(0), Lo, Tmp);
870  Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
871  // Lo = Hi==fabs(Hi) ? Lo : -Lo;
872  Lo = DAG.getSelectCC(dl, Tmp, Hi, Lo,
873                   DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
874                   ISD::SETEQ);
875}
876
877void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
878                                           SDValue &Hi) {
879  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
880                                         RTLIB::ADD_F32, RTLIB::ADD_F64,
881                                         RTLIB::ADD_F80, RTLIB::ADD_F128,
882                                         RTLIB::ADD_PPCF128),
883                            N, false);
884  GetPairElements(Call, Lo, Hi);
885}
886
887void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
888                                            SDValue &Lo, SDValue &Hi) {
889  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
890                                         RTLIB::CEIL_F32, RTLIB::CEIL_F64,
891                                         RTLIB::CEIL_F80, RTLIB::CEIL_F128,
892                                         RTLIB::CEIL_PPCF128),
893                            N, false);
894  GetPairElements(Call, Lo, Hi);
895}
896
897void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
898                                                SDValue &Lo, SDValue &Hi) {
899  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
900                                         RTLIB::COPYSIGN_F32,
901                                         RTLIB::COPYSIGN_F64,
902                                         RTLIB::COPYSIGN_F80,
903                                         RTLIB::COPYSIGN_F128,
904                                         RTLIB::COPYSIGN_PPCF128),
905                            N, false);
906  GetPairElements(Call, Lo, Hi);
907}
908
909void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
910                                           SDValue &Lo, SDValue &Hi) {
911  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
912                                         RTLIB::COS_F32, RTLIB::COS_F64,
913                                         RTLIB::COS_F80, RTLIB::COS_F128,
914                                         RTLIB::COS_PPCF128),
915                            N, false);
916  GetPairElements(Call, Lo, Hi);
917}
918
919void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
920                                           SDValue &Hi) {
921  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
922  SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
923                                                   RTLIB::DIV_F32,
924                                                   RTLIB::DIV_F64,
925                                                   RTLIB::DIV_F80,
926                                                   RTLIB::DIV_F128,
927                                                   RTLIB::DIV_PPCF128),
928                                 N->getValueType(0), Ops, 2, false,
929                                 SDLoc(N)).first;
930  GetPairElements(Call, Lo, Hi);
931}
932
933void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
934                                           SDValue &Lo, SDValue &Hi) {
935  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
936                                         RTLIB::EXP_F32, RTLIB::EXP_F64,
937                                         RTLIB::EXP_F80, RTLIB::EXP_F128,
938                                         RTLIB::EXP_PPCF128),
939                            N, false);
940  GetPairElements(Call, Lo, Hi);
941}
942
943void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
944                                            SDValue &Lo, SDValue &Hi) {
945  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
946                                         RTLIB::EXP2_F32, RTLIB::EXP2_F64,
947                                         RTLIB::EXP2_F80, RTLIB::EXP2_F128,
948                                         RTLIB::EXP2_PPCF128),
949                            N, false);
950  GetPairElements(Call, Lo, Hi);
951}
952
953void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
954                                             SDValue &Lo, SDValue &Hi) {
955  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
956                                         RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
957                                         RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
958                                         RTLIB::FLOOR_PPCF128),
959                            N, false);
960  GetPairElements(Call, Lo, Hi);
961}
962
963void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
964                                           SDValue &Lo, SDValue &Hi) {
965  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
966                                         RTLIB::LOG_F32, RTLIB::LOG_F64,
967                                         RTLIB::LOG_F80, RTLIB::LOG_F128,
968                                         RTLIB::LOG_PPCF128),
969                            N, false);
970  GetPairElements(Call, Lo, Hi);
971}
972
973void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
974                                            SDValue &Lo, SDValue &Hi) {
975  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
976                                         RTLIB::LOG2_F32, RTLIB::LOG2_F64,
977                                         RTLIB::LOG2_F80, RTLIB::LOG2_F128,
978                                         RTLIB::LOG2_PPCF128),
979                            N, false);
980  GetPairElements(Call, Lo, Hi);
981}
982
983void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
984                                             SDValue &Lo, SDValue &Hi) {
985  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
986                                         RTLIB::LOG10_F32, RTLIB::LOG10_F64,
987                                         RTLIB::LOG10_F80, RTLIB::LOG10_F128,
988                                         RTLIB::LOG10_PPCF128),
989                            N, false);
990  GetPairElements(Call, Lo, Hi);
991}
992
993void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
994                                          SDValue &Hi) {
995  SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
996  SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
997                                                   RTLIB::FMA_F32,
998                                                   RTLIB::FMA_F64,
999                                                   RTLIB::FMA_F80,
1000                                                   RTLIB::FMA_F128,
1001                                                   RTLIB::FMA_PPCF128),
1002                                 N->getValueType(0), Ops, 3, false,
1003                                 SDLoc(N)).first;
1004  GetPairElements(Call, Lo, Hi);
1005}
1006
1007void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1008                                           SDValue &Hi) {
1009  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1010  SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1011                                                   RTLIB::MUL_F32,
1012                                                   RTLIB::MUL_F64,
1013                                                   RTLIB::MUL_F80,
1014                                                   RTLIB::MUL_F128,
1015                                                   RTLIB::MUL_PPCF128),
1016                                 N->getValueType(0), Ops, 2, false,
1017                                 SDLoc(N)).first;
1018  GetPairElements(Call, Lo, Hi);
1019}
1020
1021void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1022                                                 SDValue &Lo, SDValue &Hi) {
1023  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1024                                         RTLIB::NEARBYINT_F32,
1025                                         RTLIB::NEARBYINT_F64,
1026                                         RTLIB::NEARBYINT_F80,
1027                                         RTLIB::NEARBYINT_F128,
1028                                         RTLIB::NEARBYINT_PPCF128),
1029                            N, false);
1030  GetPairElements(Call, Lo, Hi);
1031}
1032
1033void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1034                                           SDValue &Hi) {
1035  SDLoc dl(N);
1036  GetExpandedFloat(N->getOperand(0), Lo, Hi);
1037  Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1038  Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1039}
1040
1041void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1042                                                SDValue &Hi) {
1043  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1044  Hi = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), NVT, N->getOperand(0));
1045  Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1046                                 APInt(NVT.getSizeInBits(), 0)), NVT);
1047}
1048
1049void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1050                                           SDValue &Lo, SDValue &Hi) {
1051  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1052                                         RTLIB::POW_F32, RTLIB::POW_F64,
1053                                         RTLIB::POW_F80, RTLIB::POW_F128,
1054                                         RTLIB::POW_PPCF128),
1055                            N, false);
1056  GetPairElements(Call, Lo, Hi);
1057}
1058
1059void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1060                                            SDValue &Lo, SDValue &Hi) {
1061  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1062                                         RTLIB::POWI_F32, RTLIB::POWI_F64,
1063                                         RTLIB::POWI_F80, RTLIB::POWI_F128,
1064                                         RTLIB::POWI_PPCF128),
1065                            N, false);
1066  GetPairElements(Call, Lo, Hi);
1067}
1068
1069void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1070                                           SDValue &Lo, SDValue &Hi) {
1071  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1072                                         RTLIB::REM_F32, RTLIB::REM_F64,
1073                                         RTLIB::REM_F80, RTLIB::REM_F128,
1074                                         RTLIB::REM_PPCF128),
1075                            N, false);
1076  GetPairElements(Call, Lo, Hi);
1077}
1078
1079void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1080                                            SDValue &Lo, SDValue &Hi) {
1081  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1082                                         RTLIB::RINT_F32, RTLIB::RINT_F64,
1083                                         RTLIB::RINT_F80, RTLIB::RINT_F128,
1084                                         RTLIB::RINT_PPCF128),
1085                            N, false);
1086  GetPairElements(Call, Lo, Hi);
1087}
1088
1089void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1090                                             SDValue &Lo, SDValue &Hi) {
1091  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1092                                         RTLIB::ROUND_F32,
1093                                         RTLIB::ROUND_F64,
1094                                         RTLIB::ROUND_F80,
1095                                         RTLIB::ROUND_F128,
1096                                         RTLIB::ROUND_PPCF128),
1097                            N, false);
1098  GetPairElements(Call, Lo, Hi);
1099}
1100
1101void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1102                                           SDValue &Lo, SDValue &Hi) {
1103  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1104                                         RTLIB::SIN_F32, RTLIB::SIN_F64,
1105                                         RTLIB::SIN_F80, RTLIB::SIN_F128,
1106                                         RTLIB::SIN_PPCF128),
1107                            N, false);
1108  GetPairElements(Call, Lo, Hi);
1109}
1110
1111void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1112                                            SDValue &Lo, SDValue &Hi) {
1113  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1114                                         RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1115                                         RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1116                                         RTLIB::SQRT_PPCF128),
1117                            N, false);
1118  GetPairElements(Call, Lo, Hi);
1119}
1120
1121void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1122                                           SDValue &Hi) {
1123  SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1124  SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1125                                                   RTLIB::SUB_F32,
1126                                                   RTLIB::SUB_F64,
1127                                                   RTLIB::SUB_F80,
1128                                                   RTLIB::SUB_F128,
1129                                                   RTLIB::SUB_PPCF128),
1130                                 N->getValueType(0), Ops, 2, false,
1131                                 SDLoc(N)).first;
1132  GetPairElements(Call, Lo, Hi);
1133}
1134
1135void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1136                                             SDValue &Lo, SDValue &Hi) {
1137  SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1138                                         RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1139                                         RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1140                                         RTLIB::TRUNC_PPCF128),
1141                            N, false);
1142  GetPairElements(Call, Lo, Hi);
1143}
1144
1145void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1146                                           SDValue &Hi) {
1147  if (ISD::isNormalLoad(N)) {
1148    ExpandRes_NormalLoad(N, Lo, Hi);
1149    return;
1150  }
1151
1152  assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1153  LoadSDNode *LD = cast<LoadSDNode>(N);
1154  SDValue Chain = LD->getChain();
1155  SDValue Ptr = LD->getBasePtr();
1156  SDLoc dl(N);
1157
1158  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1159  assert(NVT.isByteSized() && "Expanded type not byte sized!");
1160  assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1161
1162  Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1163                      LD->getMemoryVT(), LD->getMemOperand());
1164
1165  // Remember the chain.
1166  Chain = Hi.getValue(1);
1167
1168  // The low part is zero.
1169  Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1170                                 APInt(NVT.getSizeInBits(), 0)), NVT);
1171
1172  // Modified the chain - switch anything that used the old chain to use the
1173  // new one.
1174  ReplaceValueWith(SDValue(LD, 1), Chain);
1175}
1176
1177void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1178                                                 SDValue &Hi) {
1179  assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1180  EVT VT = N->getValueType(0);
1181  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1182  SDValue Src = N->getOperand(0);
1183  EVT SrcVT = Src.getValueType();
1184  bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1185  SDLoc dl(N);
1186
1187  // First do an SINT_TO_FP, whether the original was signed or unsigned.
1188  // When promoting partial word types to i32 we must honor the signedness,
1189  // though.
1190  if (SrcVT.bitsLE(MVT::i32)) {
1191    // The integer can be represented exactly in an f64.
1192    Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1193                      MVT::i32, Src);
1194    Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1195                                   APInt(NVT.getSizeInBits(), 0)), NVT);
1196    Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1197  } else {
1198    RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1199    if (SrcVT.bitsLE(MVT::i64)) {
1200      Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1201                        MVT::i64, Src);
1202      LC = RTLIB::SINTTOFP_I64_PPCF128;
1203    } else if (SrcVT.bitsLE(MVT::i128)) {
1204      Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1205      LC = RTLIB::SINTTOFP_I128_PPCF128;
1206    }
1207    assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1208
1209    Hi = TLI.makeLibCall(DAG, LC, VT, &Src, 1, true, dl).first;
1210    GetPairElements(Hi, Lo, Hi);
1211  }
1212
1213  if (isSigned)
1214    return;
1215
1216  // Unsigned - fix up the SINT_TO_FP value just calculated.
1217  Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1218  SrcVT = Src.getValueType();
1219
1220  // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1221  static const uint64_t TwoE32[]  = { 0x41f0000000000000LL, 0 };
1222  static const uint64_t TwoE64[]  = { 0x43f0000000000000LL, 0 };
1223  static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1224  ArrayRef<uint64_t> Parts;
1225
1226  switch (SrcVT.getSimpleVT().SimpleTy) {
1227  default:
1228    llvm_unreachable("Unsupported UINT_TO_FP!");
1229  case MVT::i32:
1230    Parts = TwoE32;
1231    break;
1232  case MVT::i64:
1233    Parts = TwoE64;
1234    break;
1235  case MVT::i128:
1236    Parts = TwoE128;
1237    break;
1238  }
1239
1240  Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1241                   DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble,
1242                                             APInt(128, Parts)),
1243                                     MVT::ppcf128));
1244  Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, SrcVT),
1245                       Lo, Hi, ISD::SETLT);
1246  GetPairElements(Lo, Lo, Hi);
1247}
1248
1249
1250//===----------------------------------------------------------------------===//
1251//  Float Operand Expansion
1252//===----------------------------------------------------------------------===//
1253
1254/// ExpandFloatOperand - This method is called when the specified operand of the
1255/// specified node is found to need expansion.  At this point, all of the result
1256/// types of the node are known to be legal, but other operands of the node may
1257/// need promotion or expansion as well as the specified one.
1258bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1259  DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1260  SDValue Res = SDValue();
1261
1262  // See if the target wants to custom expand this node.
1263  if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1264    return false;
1265
1266  switch (N->getOpcode()) {
1267  default:
1268#ifndef NDEBUG
1269    dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1270    N->dump(&DAG); dbgs() << "\n";
1271#endif
1272    llvm_unreachable("Do not know how to expand this operator's operand!");
1273
1274  case ISD::BITCAST:         Res = ExpandOp_BITCAST(N); break;
1275  case ISD::BUILD_VECTOR:    Res = ExpandOp_BUILD_VECTOR(N); break;
1276  case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1277
1278  case ISD::BR_CC:      Res = ExpandFloatOp_BR_CC(N); break;
1279  case ISD::FCOPYSIGN:  Res = ExpandFloatOp_FCOPYSIGN(N); break;
1280  case ISD::FP_ROUND:   Res = ExpandFloatOp_FP_ROUND(N); break;
1281  case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1282  case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1283  case ISD::SELECT_CC:  Res = ExpandFloatOp_SELECT_CC(N); break;
1284  case ISD::SETCC:      Res = ExpandFloatOp_SETCC(N); break;
1285  case ISD::STORE:      Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1286                                                  OpNo); break;
1287  }
1288
1289  // If the result is null, the sub-method took care of registering results etc.
1290  if (!Res.getNode()) return false;
1291
1292  // If the result is N, the sub-method updated N in place.  Tell the legalizer
1293  // core about this.
1294  if (Res.getNode() == N)
1295    return true;
1296
1297  assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1298         "Invalid operand expansion");
1299
1300  ReplaceValueWith(SDValue(N, 0), Res);
1301  return false;
1302}
1303
1304/// FloatExpandSetCCOperands - Expand the operands of a comparison.  This code
1305/// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1306void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1307                                                SDValue &NewRHS,
1308                                                ISD::CondCode &CCCode,
1309                                                SDLoc dl) {
1310  SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1311  GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1312  GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1313
1314  assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1315
1316  // FIXME:  This generated code sucks.  We want to generate
1317  //         FCMPU crN, hi1, hi2
1318  //         BNE crN, L:
1319  //         FCMPU crN, lo1, lo2
1320  // The following can be improved, but not that much.
1321  SDValue Tmp1, Tmp2, Tmp3;
1322  Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1323                      LHSHi, RHSHi, ISD::SETOEQ);
1324  Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1325                      LHSLo, RHSLo, CCCode);
1326  Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1327  Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1328                      LHSHi, RHSHi, ISD::SETUNE);
1329  Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1330                      LHSHi, RHSHi, CCCode);
1331  Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1332  NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1333  NewRHS = SDValue();   // LHS is the result, not a compare.
1334}
1335
1336SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1337  SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1338  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1339  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1340
1341  // If ExpandSetCCOperands returned a scalar, we need to compare the result
1342  // against zero to select between true and false values.
1343  if (NewRHS.getNode() == 0) {
1344    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1345    CCCode = ISD::SETNE;
1346  }
1347
1348  // Update N to have the operands specified.
1349  return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1350                                DAG.getCondCode(CCCode), NewLHS, NewRHS,
1351                                N->getOperand(4)), 0);
1352}
1353
1354SDValue DAGTypeLegalizer::ExpandFloatOp_FCOPYSIGN(SDNode *N) {
1355  assert(N->getOperand(1).getValueType() == MVT::ppcf128 &&
1356         "Logic only correct for ppcf128!");
1357  SDValue Lo, Hi;
1358  GetExpandedFloat(N->getOperand(1), Lo, Hi);
1359  // The ppcf128 value is providing only the sign; take it from the
1360  // higher-order double (which must have the larger magnitude).
1361  return DAG.getNode(ISD::FCOPYSIGN, SDLoc(N),
1362                     N->getValueType(0), N->getOperand(0), Hi);
1363}
1364
1365SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1366  assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1367         "Logic only correct for ppcf128!");
1368  SDValue Lo, Hi;
1369  GetExpandedFloat(N->getOperand(0), Lo, Hi);
1370  // Round it the rest of the way (e.g. to f32) if needed.
1371  return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1372                     N->getValueType(0), Hi, N->getOperand(1));
1373}
1374
1375SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1376  EVT RVT = N->getValueType(0);
1377  SDLoc dl(N);
1378
1379  // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1380  // PPC (the libcall is not available).  FIXME: Do this in a less hacky way.
1381  if (RVT == MVT::i32) {
1382    assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1383           "Logic only correct for ppcf128!");
1384    SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1385                              N->getOperand(0), DAG.getValueType(MVT::f64));
1386    Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1387                      DAG.getIntPtrConstant(1));
1388    return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1389  }
1390
1391  RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1392  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1393  return TLI.makeLibCall(DAG, LC, RVT, &N->getOperand(0), 1, false, dl).first;
1394}
1395
1396SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1397  EVT RVT = N->getValueType(0);
1398  SDLoc dl(N);
1399
1400  // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1401  // PPC (the libcall is not available).  FIXME: Do this in a less hacky way.
1402  if (RVT == MVT::i32) {
1403    assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1404           "Logic only correct for ppcf128!");
1405    const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1406    APFloat APF = APFloat(APFloat::PPCDoubleDouble, APInt(128, TwoE31));
1407    SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1408    //  X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1409    // FIXME: generated code sucks.
1410    return DAG.getSelectCC(dl, N->getOperand(0), Tmp,
1411                           DAG.getNode(ISD::ADD, dl, MVT::i32,
1412                                       DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1413                                                   DAG.getNode(ISD::FSUB, dl,
1414                                                               MVT::ppcf128,
1415                                                               N->getOperand(0),
1416                                                               Tmp)),
1417                                       DAG.getConstant(0x80000000, MVT::i32)),
1418                           DAG.getNode(ISD::FP_TO_SINT, dl,
1419                                       MVT::i32, N->getOperand(0)),
1420                           ISD::SETGE);
1421  }
1422
1423  RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1424  assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1425  return TLI.makeLibCall(DAG, LC, N->getValueType(0), &N->getOperand(0), 1,
1426                         false, dl).first;
1427}
1428
1429SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1430  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1431  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1432  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1433
1434  // If ExpandSetCCOperands returned a scalar, we need to compare the result
1435  // against zero to select between true and false values.
1436  if (NewRHS.getNode() == 0) {
1437    NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1438    CCCode = ISD::SETNE;
1439  }
1440
1441  // Update N to have the operands specified.
1442  return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1443                                N->getOperand(2), N->getOperand(3),
1444                                DAG.getCondCode(CCCode)), 0);
1445}
1446
1447SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1448  SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1449  ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1450  FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1451
1452  // If ExpandSetCCOperands returned a scalar, use it.
1453  if (NewRHS.getNode() == 0) {
1454    assert(NewLHS.getValueType() == N->getValueType(0) &&
1455           "Unexpected setcc expansion!");
1456    return NewLHS;
1457  }
1458
1459  // Otherwise, update N to have the operands specified.
1460  return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1461                                DAG.getCondCode(CCCode)), 0);
1462}
1463
1464SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1465  if (ISD::isNormalStore(N))
1466    return ExpandOp_NormalStore(N, OpNo);
1467
1468  assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1469  assert(OpNo == 1 && "Can only expand the stored value so far");
1470  StoreSDNode *ST = cast<StoreSDNode>(N);
1471
1472  SDValue Chain = ST->getChain();
1473  SDValue Ptr = ST->getBasePtr();
1474
1475  EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1476                                     ST->getValue().getValueType());
1477  assert(NVT.isByteSized() && "Expanded type not byte sized!");
1478  assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1479  (void)NVT;
1480
1481  SDValue Lo, Hi;
1482  GetExpandedOp(ST->getValue(), Lo, Hi);
1483
1484  return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1485                           ST->getMemoryVT(), ST->getMemOperand());
1486}
1487