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"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/raw_ostream.h"
25 using namespace llvm;
26
27 #define DEBUG_TYPE "legalize-types"
28
29 /// GetFPLibCall - Return the right libcall for the given floating point type.
GetFPLibCall(EVT VT,RTLIB::Libcall Call_F32,RTLIB::Libcall Call_F64,RTLIB::Libcall Call_F80,RTLIB::Libcall Call_F128,RTLIB::Libcall Call_PPCF128)30 static RTLIB::Libcall GetFPLibCall(EVT VT,
31 RTLIB::Libcall Call_F32,
32 RTLIB::Libcall Call_F64,
33 RTLIB::Libcall Call_F80,
34 RTLIB::Libcall Call_F128,
35 RTLIB::Libcall Call_PPCF128) {
36 return
37 VT == MVT::f32 ? Call_F32 :
38 VT == MVT::f64 ? Call_F64 :
39 VT == MVT::f80 ? Call_F80 :
40 VT == MVT::f128 ? Call_F128 :
41 VT == MVT::ppcf128 ? Call_PPCF128 :
42 RTLIB::UNKNOWN_LIBCALL;
43 }
44
45 //===----------------------------------------------------------------------===//
46 // Result Float to Integer Conversion.
47 //===----------------------------------------------------------------------===//
48
SoftenFloatResult(SDNode * N,unsigned ResNo)49 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
50 DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
51 dbgs() << "\n");
52 SDValue R = SDValue();
53
54 switch (N->getOpcode()) {
55 default:
56 #ifndef NDEBUG
57 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
58 N->dump(&DAG); dbgs() << "\n";
59 #endif
60 llvm_unreachable("Do not know how to soften the result of this operator!");
61
62 case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
63 case ISD::BITCAST: R = SoftenFloatRes_BITCAST(N); break;
64 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
65 case ISD::ConstantFP:
66 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
67 break;
68 case ISD::EXTRACT_VECTOR_ELT:
69 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
70 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
71 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
72 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
73 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
74 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
75 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
76 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
77 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
78 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
79 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
80 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
81 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
82 case ISD::FMA: R = SoftenFloatRes_FMA(N); break;
83 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
84 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
85 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
86 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
87 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
88 case ISD::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(N); break;
89 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
90 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
91 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
92 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
93 case ISD::FROUND: R = SoftenFloatRes_FROUND(N); break;
94 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
95 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
96 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
97 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
98 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
99 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
100 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
101 case ISD::SINT_TO_FP:
102 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
103 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
104 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
105 }
106
107 // If R is null, the sub-method took care of registering the result.
108 if (R.getNode())
109 SetSoftenedFloat(SDValue(N, ResNo), R);
110 }
111
SoftenFloatRes_BITCAST(SDNode * N)112 SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
113 return BitConvertToInteger(N->getOperand(0));
114 }
115
SoftenFloatRes_MERGE_VALUES(SDNode * N,unsigned ResNo)116 SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
117 unsigned ResNo) {
118 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
119 return BitConvertToInteger(Op);
120 }
121
SoftenFloatRes_BUILD_PAIR(SDNode * N)122 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
123 // Convert the inputs to integers, and build a new pair out of them.
124 return DAG.getNode(ISD::BUILD_PAIR, SDLoc(N),
125 TLI.getTypeToTransformTo(*DAG.getContext(),
126 N->getValueType(0)),
127 BitConvertToInteger(N->getOperand(0)),
128 BitConvertToInteger(N->getOperand(1)));
129 }
130
SoftenFloatRes_ConstantFP(ConstantFPSDNode * N)131 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
132 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
133 TLI.getTypeToTransformTo(*DAG.getContext(),
134 N->getValueType(0)));
135 }
136
SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode * N)137 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
138 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
139 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
140 NewOp.getValueType().getVectorElementType(),
141 NewOp, N->getOperand(1));
142 }
143
SoftenFloatRes_FABS(SDNode * N)144 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
145 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
146 unsigned Size = NVT.getSizeInBits();
147
148 // Mask = ~(1 << (Size-1))
149 APInt API = APInt::getAllOnesValue(Size);
150 API.clearBit(Size-1);
151 SDValue Mask = DAG.getConstant(API, NVT);
152 SDValue Op = GetSoftenedFloat(N->getOperand(0));
153 return DAG.getNode(ISD::AND, SDLoc(N), NVT, Op, Mask);
154 }
155
SoftenFloatRes_FADD(SDNode * N)156 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
157 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
158 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
159 GetSoftenedFloat(N->getOperand(1)) };
160 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
161 RTLIB::ADD_F32,
162 RTLIB::ADD_F64,
163 RTLIB::ADD_F80,
164 RTLIB::ADD_F128,
165 RTLIB::ADD_PPCF128),
166 NVT, Ops, 2, false, SDLoc(N)).first;
167 }
168
SoftenFloatRes_FCEIL(SDNode * N)169 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
170 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
171 SDValue Op = GetSoftenedFloat(N->getOperand(0));
172 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
173 RTLIB::CEIL_F32,
174 RTLIB::CEIL_F64,
175 RTLIB::CEIL_F80,
176 RTLIB::CEIL_F128,
177 RTLIB::CEIL_PPCF128),
178 NVT, &Op, 1, false, SDLoc(N)).first;
179 }
180
SoftenFloatRes_FCOPYSIGN(SDNode * N)181 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
182 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
183 SDValue RHS = BitConvertToInteger(N->getOperand(1));
184 SDLoc dl(N);
185
186 EVT LVT = LHS.getValueType();
187 EVT RVT = RHS.getValueType();
188
189 unsigned LSize = LVT.getSizeInBits();
190 unsigned RSize = RVT.getSizeInBits();
191
192 // First get the sign bit of second operand.
193 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
194 DAG.getConstant(RSize - 1,
195 TLI.getShiftAmountTy(RVT)));
196 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
197
198 // Shift right or sign-extend it if the two operands have different types.
199 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
200 if (SizeDiff > 0) {
201 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
202 DAG.getConstant(SizeDiff,
203 TLI.getShiftAmountTy(SignBit.getValueType())));
204 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
205 } else if (SizeDiff < 0) {
206 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
207 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
208 DAG.getConstant(-SizeDiff,
209 TLI.getShiftAmountTy(SignBit.getValueType())));
210 }
211
212 // Clear the sign bit of the first operand.
213 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
214 DAG.getConstant(LSize - 1,
215 TLI.getShiftAmountTy(LVT)));
216 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
217 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
218
219 // Or the value with the sign bit.
220 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
221 }
222
SoftenFloatRes_FCOS(SDNode * N)223 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
224 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
225 SDValue Op = GetSoftenedFloat(N->getOperand(0));
226 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
227 RTLIB::COS_F32,
228 RTLIB::COS_F64,
229 RTLIB::COS_F80,
230 RTLIB::COS_F128,
231 RTLIB::COS_PPCF128),
232 NVT, &Op, 1, false, SDLoc(N)).first;
233 }
234
SoftenFloatRes_FDIV(SDNode * N)235 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
236 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
237 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
238 GetSoftenedFloat(N->getOperand(1)) };
239 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
240 RTLIB::DIV_F32,
241 RTLIB::DIV_F64,
242 RTLIB::DIV_F80,
243 RTLIB::DIV_F128,
244 RTLIB::DIV_PPCF128),
245 NVT, Ops, 2, false, SDLoc(N)).first;
246 }
247
SoftenFloatRes_FEXP(SDNode * N)248 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
249 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
250 SDValue Op = GetSoftenedFloat(N->getOperand(0));
251 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
252 RTLIB::EXP_F32,
253 RTLIB::EXP_F64,
254 RTLIB::EXP_F80,
255 RTLIB::EXP_F128,
256 RTLIB::EXP_PPCF128),
257 NVT, &Op, 1, false, SDLoc(N)).first;
258 }
259
SoftenFloatRes_FEXP2(SDNode * N)260 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
261 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
262 SDValue Op = GetSoftenedFloat(N->getOperand(0));
263 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
264 RTLIB::EXP2_F32,
265 RTLIB::EXP2_F64,
266 RTLIB::EXP2_F80,
267 RTLIB::EXP2_F128,
268 RTLIB::EXP2_PPCF128),
269 NVT, &Op, 1, false, SDLoc(N)).first;
270 }
271
SoftenFloatRes_FFLOOR(SDNode * N)272 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
273 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
274 SDValue Op = GetSoftenedFloat(N->getOperand(0));
275 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
276 RTLIB::FLOOR_F32,
277 RTLIB::FLOOR_F64,
278 RTLIB::FLOOR_F80,
279 RTLIB::FLOOR_F128,
280 RTLIB::FLOOR_PPCF128),
281 NVT, &Op, 1, false, SDLoc(N)).first;
282 }
283
SoftenFloatRes_FLOG(SDNode * N)284 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
285 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
286 SDValue Op = GetSoftenedFloat(N->getOperand(0));
287 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
288 RTLIB::LOG_F32,
289 RTLIB::LOG_F64,
290 RTLIB::LOG_F80,
291 RTLIB::LOG_F128,
292 RTLIB::LOG_PPCF128),
293 NVT, &Op, 1, false, SDLoc(N)).first;
294 }
295
SoftenFloatRes_FLOG2(SDNode * N)296 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
297 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
298 SDValue Op = GetSoftenedFloat(N->getOperand(0));
299 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
300 RTLIB::LOG2_F32,
301 RTLIB::LOG2_F64,
302 RTLIB::LOG2_F80,
303 RTLIB::LOG2_F128,
304 RTLIB::LOG2_PPCF128),
305 NVT, &Op, 1, false, SDLoc(N)).first;
306 }
307
SoftenFloatRes_FLOG10(SDNode * N)308 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
309 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
310 SDValue Op = GetSoftenedFloat(N->getOperand(0));
311 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
312 RTLIB::LOG10_F32,
313 RTLIB::LOG10_F64,
314 RTLIB::LOG10_F80,
315 RTLIB::LOG10_F128,
316 RTLIB::LOG10_PPCF128),
317 NVT, &Op, 1, false, SDLoc(N)).first;
318 }
319
SoftenFloatRes_FMA(SDNode * N)320 SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
321 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
322 SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
323 GetSoftenedFloat(N->getOperand(1)),
324 GetSoftenedFloat(N->getOperand(2)) };
325 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
326 RTLIB::FMA_F32,
327 RTLIB::FMA_F64,
328 RTLIB::FMA_F80,
329 RTLIB::FMA_F128,
330 RTLIB::FMA_PPCF128),
331 NVT, Ops, 3, false, SDLoc(N)).first;
332 }
333
SoftenFloatRes_FMUL(SDNode * N)334 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
335 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
336 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
337 GetSoftenedFloat(N->getOperand(1)) };
338 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
339 RTLIB::MUL_F32,
340 RTLIB::MUL_F64,
341 RTLIB::MUL_F80,
342 RTLIB::MUL_F128,
343 RTLIB::MUL_PPCF128),
344 NVT, Ops, 2, false, SDLoc(N)).first;
345 }
346
SoftenFloatRes_FNEARBYINT(SDNode * N)347 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
348 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
349 SDValue Op = GetSoftenedFloat(N->getOperand(0));
350 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
351 RTLIB::NEARBYINT_F32,
352 RTLIB::NEARBYINT_F64,
353 RTLIB::NEARBYINT_F80,
354 RTLIB::NEARBYINT_F128,
355 RTLIB::NEARBYINT_PPCF128),
356 NVT, &Op, 1, false, SDLoc(N)).first;
357 }
358
SoftenFloatRes_FNEG(SDNode * N)359 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
360 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
361 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
362 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
363 GetSoftenedFloat(N->getOperand(0)) };
364 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
365 RTLIB::SUB_F32,
366 RTLIB::SUB_F64,
367 RTLIB::SUB_F80,
368 RTLIB::SUB_F128,
369 RTLIB::SUB_PPCF128),
370 NVT, Ops, 2, false, SDLoc(N)).first;
371 }
372
SoftenFloatRes_FP_EXTEND(SDNode * N)373 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
374 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
375 SDValue Op = N->getOperand(0);
376 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
377 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
378 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
379 }
380
381 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
382 // nodes?
SoftenFloatRes_FP16_TO_FP32(SDNode * N)383 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
384 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
385 SDValue Op = N->getOperand(0);
386 return TLI.makeLibCall(DAG, RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false,
387 SDLoc(N)).first;
388 }
389
SoftenFloatRes_FP_ROUND(SDNode * N)390 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
391 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
392 SDValue Op = N->getOperand(0);
393 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
394 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
395 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
396 }
397
SoftenFloatRes_FPOW(SDNode * N)398 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
399 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
400 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
401 GetSoftenedFloat(N->getOperand(1)) };
402 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
403 RTLIB::POW_F32,
404 RTLIB::POW_F64,
405 RTLIB::POW_F80,
406 RTLIB::POW_F128,
407 RTLIB::POW_PPCF128),
408 NVT, Ops, 2, false, SDLoc(N)).first;
409 }
410
SoftenFloatRes_FPOWI(SDNode * N)411 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
412 assert(N->getOperand(1).getValueType() == MVT::i32 &&
413 "Unsupported power type!");
414 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
415 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
416 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
417 RTLIB::POWI_F32,
418 RTLIB::POWI_F64,
419 RTLIB::POWI_F80,
420 RTLIB::POWI_F128,
421 RTLIB::POWI_PPCF128),
422 NVT, Ops, 2, false, SDLoc(N)).first;
423 }
424
SoftenFloatRes_FREM(SDNode * N)425 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
426 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
427 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
428 GetSoftenedFloat(N->getOperand(1)) };
429 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
430 RTLIB::REM_F32,
431 RTLIB::REM_F64,
432 RTLIB::REM_F80,
433 RTLIB::REM_F128,
434 RTLIB::REM_PPCF128),
435 NVT, Ops, 2, false, SDLoc(N)).first;
436 }
437
SoftenFloatRes_FRINT(SDNode * N)438 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
439 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
440 SDValue Op = GetSoftenedFloat(N->getOperand(0));
441 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
442 RTLIB::RINT_F32,
443 RTLIB::RINT_F64,
444 RTLIB::RINT_F80,
445 RTLIB::RINT_F128,
446 RTLIB::RINT_PPCF128),
447 NVT, &Op, 1, false, SDLoc(N)).first;
448 }
449
SoftenFloatRes_FROUND(SDNode * N)450 SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
451 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
452 SDValue Op = GetSoftenedFloat(N->getOperand(0));
453 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
454 RTLIB::ROUND_F32,
455 RTLIB::ROUND_F64,
456 RTLIB::ROUND_F80,
457 RTLIB::ROUND_F128,
458 RTLIB::ROUND_PPCF128),
459 NVT, &Op, 1, false, SDLoc(N)).first;
460 }
461
SoftenFloatRes_FSIN(SDNode * N)462 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
463 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
464 SDValue Op = GetSoftenedFloat(N->getOperand(0));
465 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
466 RTLIB::SIN_F32,
467 RTLIB::SIN_F64,
468 RTLIB::SIN_F80,
469 RTLIB::SIN_F128,
470 RTLIB::SIN_PPCF128),
471 NVT, &Op, 1, false, SDLoc(N)).first;
472 }
473
SoftenFloatRes_FSQRT(SDNode * N)474 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
475 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
476 SDValue Op = GetSoftenedFloat(N->getOperand(0));
477 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
478 RTLIB::SQRT_F32,
479 RTLIB::SQRT_F64,
480 RTLIB::SQRT_F80,
481 RTLIB::SQRT_F128,
482 RTLIB::SQRT_PPCF128),
483 NVT, &Op, 1, false, SDLoc(N)).first;
484 }
485
SoftenFloatRes_FSUB(SDNode * N)486 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
487 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
488 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
489 GetSoftenedFloat(N->getOperand(1)) };
490 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
491 RTLIB::SUB_F32,
492 RTLIB::SUB_F64,
493 RTLIB::SUB_F80,
494 RTLIB::SUB_F128,
495 RTLIB::SUB_PPCF128),
496 NVT, Ops, 2, false, SDLoc(N)).first;
497 }
498
SoftenFloatRes_FTRUNC(SDNode * N)499 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
500 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
501 SDValue Op = GetSoftenedFloat(N->getOperand(0));
502 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
503 RTLIB::TRUNC_F32,
504 RTLIB::TRUNC_F64,
505 RTLIB::TRUNC_F80,
506 RTLIB::TRUNC_F128,
507 RTLIB::TRUNC_PPCF128),
508 NVT, &Op, 1, false, SDLoc(N)).first;
509 }
510
SoftenFloatRes_LOAD(SDNode * N)511 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
512 LoadSDNode *L = cast<LoadSDNode>(N);
513 EVT VT = N->getValueType(0);
514 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
515 SDLoc dl(N);
516
517 SDValue NewL;
518 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
519 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
520 NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
521 L->getPointerInfo(), NVT, L->isVolatile(),
522 L->isNonTemporal(), false, L->getAlignment(),
523 L->getTBAAInfo());
524 // Legalized the chain result - switch anything that used the old chain to
525 // use the new one.
526 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
527 return NewL;
528 }
529
530 // Do a non-extending load followed by FP_EXTEND.
531 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
532 L->getMemoryVT(), dl, L->getChain(),
533 L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
534 L->getMemoryVT(), L->isVolatile(),
535 L->isNonTemporal(), false, L->getAlignment(),
536 L->getTBAAInfo());
537 // Legalized the chain result - switch anything that used the old chain to
538 // use the new one.
539 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
540 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
541 }
542
SoftenFloatRes_SELECT(SDNode * N)543 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
544 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
545 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
546 return DAG.getSelect(SDLoc(N),
547 LHS.getValueType(), N->getOperand(0), LHS, RHS);
548 }
549
SoftenFloatRes_SELECT_CC(SDNode * N)550 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
551 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
552 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
553 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
554 LHS.getValueType(), N->getOperand(0),
555 N->getOperand(1), LHS, RHS, N->getOperand(4));
556 }
557
SoftenFloatRes_UNDEF(SDNode * N)558 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
559 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
560 N->getValueType(0)));
561 }
562
SoftenFloatRes_VAARG(SDNode * N)563 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
564 SDValue Chain = N->getOperand(0); // Get the chain.
565 SDValue Ptr = N->getOperand(1); // Get the pointer.
566 EVT VT = N->getValueType(0);
567 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
568 SDLoc dl(N);
569
570 SDValue NewVAARG;
571 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
572 N->getConstantOperandVal(3));
573
574 // Legalized the chain result - switch anything that used the old chain to
575 // use the new one.
576 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
577 return NewVAARG;
578 }
579
SoftenFloatRes_XINT_TO_FP(SDNode * N)580 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
581 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
582 EVT SVT = N->getOperand(0).getValueType();
583 EVT RVT = N->getValueType(0);
584 EVT NVT = EVT();
585 SDLoc dl(N);
586
587 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
588 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
589 // match. Look for an appropriate libcall.
590 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
591 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
592 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
593 NVT = (MVT::SimpleValueType)t;
594 // The source needs to big enough to hold the operand.
595 if (NVT.bitsGE(SVT))
596 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
597 }
598 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
599
600 // Sign/zero extend the argument if the libcall takes a larger type.
601 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
602 NVT, N->getOperand(0));
603 return TLI.makeLibCall(DAG, LC,
604 TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
605 &Op, 1, false, dl).first;
606 }
607
608
609 //===----------------------------------------------------------------------===//
610 // Operand Float to Integer Conversion..
611 //===----------------------------------------------------------------------===//
612
SoftenFloatOperand(SDNode * N,unsigned OpNo)613 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
614 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
615 dbgs() << "\n");
616 SDValue Res = SDValue();
617
618 switch (N->getOpcode()) {
619 default:
620 #ifndef NDEBUG
621 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
622 N->dump(&DAG); dbgs() << "\n";
623 #endif
624 llvm_unreachable("Do not know how to soften this operator's operand!");
625
626 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
627 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
628 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
629 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
630 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
631 case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
632 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
633 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
634 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
635 }
636
637 // If the result is null, the sub-method took care of registering results etc.
638 if (!Res.getNode()) return false;
639
640 // If the result is N, the sub-method updated N in place. Tell the legalizer
641 // core about this.
642 if (Res.getNode() == N)
643 return true;
644
645 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
646 "Invalid operand expansion");
647
648 ReplaceValueWith(SDValue(N, 0), Res);
649 return false;
650 }
651
SoftenFloatOp_BITCAST(SDNode * N)652 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
653 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
654 GetSoftenedFloat(N->getOperand(0)));
655 }
656
SoftenFloatOp_FP_ROUND(SDNode * N)657 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
658 EVT SVT = N->getOperand(0).getValueType();
659 EVT RVT = N->getValueType(0);
660
661 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
662 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
663
664 SDValue Op = GetSoftenedFloat(N->getOperand(0));
665 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
666 }
667
SoftenFloatOp_BR_CC(SDNode * N)668 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
669 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
670 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
671
672 EVT VT = NewLHS.getValueType();
673 NewLHS = GetSoftenedFloat(NewLHS);
674 NewRHS = GetSoftenedFloat(NewRHS);
675 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
676
677 // If softenSetCCOperands returned a scalar, we need to compare the result
678 // against zero to select between true and false values.
679 if (!NewRHS.getNode()) {
680 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
681 CCCode = ISD::SETNE;
682 }
683
684 // Update N to have the operands specified.
685 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
686 DAG.getCondCode(CCCode), NewLHS, NewRHS,
687 N->getOperand(4)),
688 0);
689 }
690
SoftenFloatOp_FP_TO_SINT(SDNode * N)691 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
692 EVT RVT = N->getValueType(0);
693 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
694 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
695 SDValue Op = GetSoftenedFloat(N->getOperand(0));
696 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
697 }
698
SoftenFloatOp_FP_TO_UINT(SDNode * N)699 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
700 EVT RVT = N->getValueType(0);
701 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
702 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
703 SDValue Op = GetSoftenedFloat(N->getOperand(0));
704 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
705 }
706
SoftenFloatOp_FP32_TO_FP16(SDNode * N)707 SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
708 EVT RVT = N->getValueType(0);
709 RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
710 SDValue Op = GetSoftenedFloat(N->getOperand(0));
711 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
712 }
713
SoftenFloatOp_SELECT_CC(SDNode * N)714 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
715 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
716 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
717
718 EVT VT = NewLHS.getValueType();
719 NewLHS = GetSoftenedFloat(NewLHS);
720 NewRHS = GetSoftenedFloat(NewRHS);
721 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
722
723 // If softenSetCCOperands returned a scalar, we need to compare the result
724 // against zero to select between true and false values.
725 if (!NewRHS.getNode()) {
726 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
727 CCCode = ISD::SETNE;
728 }
729
730 // Update N to have the operands specified.
731 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
732 N->getOperand(2), N->getOperand(3),
733 DAG.getCondCode(CCCode)),
734 0);
735 }
736
SoftenFloatOp_SETCC(SDNode * N)737 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
738 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
739 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
740
741 EVT VT = NewLHS.getValueType();
742 NewLHS = GetSoftenedFloat(NewLHS);
743 NewRHS = GetSoftenedFloat(NewRHS);
744 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
745
746 // If softenSetCCOperands returned a scalar, use it.
747 if (!NewRHS.getNode()) {
748 assert(NewLHS.getValueType() == N->getValueType(0) &&
749 "Unexpected setcc expansion!");
750 return NewLHS;
751 }
752
753 // Otherwise, update N to have the operands specified.
754 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
755 DAG.getCondCode(CCCode)),
756 0);
757 }
758
SoftenFloatOp_STORE(SDNode * N,unsigned OpNo)759 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
760 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
761 assert(OpNo == 1 && "Can only soften the stored value!");
762 StoreSDNode *ST = cast<StoreSDNode>(N);
763 SDValue Val = ST->getValue();
764 SDLoc dl(N);
765
766 if (ST->isTruncatingStore())
767 // Do an FP_ROUND followed by a non-truncating store.
768 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
769 Val, DAG.getIntPtrConstant(0)));
770 else
771 Val = GetSoftenedFloat(Val);
772
773 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
774 ST->getMemOperand());
775 }
776
777
778 //===----------------------------------------------------------------------===//
779 // Float Result Expansion
780 //===----------------------------------------------------------------------===//
781
782 /// ExpandFloatResult - This method is called when the specified result of the
783 /// specified node is found to need expansion. At this point, the node may also
784 /// have invalid operands or may have other results that need promotion, we just
785 /// know that (at least) one result needs expansion.
ExpandFloatResult(SDNode * N,unsigned ResNo)786 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
787 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
788 SDValue Lo, Hi;
789 Lo = Hi = SDValue();
790
791 // See if the target wants to custom expand this node.
792 if (CustomLowerNode(N, N->getValueType(ResNo), true))
793 return;
794
795 switch (N->getOpcode()) {
796 default:
797 #ifndef NDEBUG
798 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
799 N->dump(&DAG); dbgs() << "\n";
800 #endif
801 llvm_unreachable("Do not know how to expand the result of this operator!");
802
803 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
804 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
805 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
806
807 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
808 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
809 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
810 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
811 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
812 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
813
814 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
815 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
816 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
817 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
818 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
819 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
820 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
821 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
822 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
823 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
824 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
825 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
826 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
827 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
828 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
829 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
830 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
831 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
832 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
833 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
834 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
835 case ISD::FROUND: ExpandFloatRes_FROUND(N, Lo, Hi); break;
836 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
837 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
838 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
839 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
840 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
841 case ISD::SINT_TO_FP:
842 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
843 case ISD::FREM: ExpandFloatRes_FREM(N, Lo, Hi); break;
844 }
845
846 // If Lo/Hi is null, the sub-method took care of registering results etc.
847 if (Lo.getNode())
848 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
849 }
850
ExpandFloatRes_ConstantFP(SDNode * N,SDValue & Lo,SDValue & Hi)851 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
852 SDValue &Hi) {
853 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
854 assert(NVT.getSizeInBits() == integerPartWidth &&
855 "Do not know how to expand this float constant!");
856 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
857 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
858 APInt(integerPartWidth, C.getRawData()[1])),
859 NVT);
860 Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
861 APInt(integerPartWidth, C.getRawData()[0])),
862 NVT);
863 }
864
ExpandFloatRes_FABS(SDNode * N,SDValue & Lo,SDValue & Hi)865 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
866 SDValue &Hi) {
867 assert(N->getValueType(0) == MVT::ppcf128 &&
868 "Logic only correct for ppcf128!");
869 SDLoc dl(N);
870 SDValue Tmp;
871 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
872 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
873 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
874 Lo = DAG.getSelectCC(dl, Tmp, Hi, Lo,
875 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
876 ISD::SETEQ);
877 }
878
ExpandFloatRes_FADD(SDNode * N,SDValue & Lo,SDValue & Hi)879 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
880 SDValue &Hi) {
881 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
882 RTLIB::ADD_F32, RTLIB::ADD_F64,
883 RTLIB::ADD_F80, RTLIB::ADD_F128,
884 RTLIB::ADD_PPCF128),
885 N, false);
886 GetPairElements(Call, Lo, Hi);
887 }
888
ExpandFloatRes_FCEIL(SDNode * N,SDValue & Lo,SDValue & Hi)889 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
890 SDValue &Lo, SDValue &Hi) {
891 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
892 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
893 RTLIB::CEIL_F80, RTLIB::CEIL_F128,
894 RTLIB::CEIL_PPCF128),
895 N, false);
896 GetPairElements(Call, Lo, Hi);
897 }
898
ExpandFloatRes_FCOPYSIGN(SDNode * N,SDValue & Lo,SDValue & Hi)899 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
900 SDValue &Lo, SDValue &Hi) {
901 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
902 RTLIB::COPYSIGN_F32,
903 RTLIB::COPYSIGN_F64,
904 RTLIB::COPYSIGN_F80,
905 RTLIB::COPYSIGN_F128,
906 RTLIB::COPYSIGN_PPCF128),
907 N, false);
908 GetPairElements(Call, Lo, Hi);
909 }
910
ExpandFloatRes_FCOS(SDNode * N,SDValue & Lo,SDValue & Hi)911 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
912 SDValue &Lo, SDValue &Hi) {
913 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
914 RTLIB::COS_F32, RTLIB::COS_F64,
915 RTLIB::COS_F80, RTLIB::COS_F128,
916 RTLIB::COS_PPCF128),
917 N, false);
918 GetPairElements(Call, Lo, Hi);
919 }
920
ExpandFloatRes_FDIV(SDNode * N,SDValue & Lo,SDValue & Hi)921 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
922 SDValue &Hi) {
923 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
924 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
925 RTLIB::DIV_F32,
926 RTLIB::DIV_F64,
927 RTLIB::DIV_F80,
928 RTLIB::DIV_F128,
929 RTLIB::DIV_PPCF128),
930 N->getValueType(0), Ops, 2, false,
931 SDLoc(N)).first;
932 GetPairElements(Call, Lo, Hi);
933 }
934
ExpandFloatRes_FEXP(SDNode * N,SDValue & Lo,SDValue & Hi)935 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
936 SDValue &Lo, SDValue &Hi) {
937 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
938 RTLIB::EXP_F32, RTLIB::EXP_F64,
939 RTLIB::EXP_F80, RTLIB::EXP_F128,
940 RTLIB::EXP_PPCF128),
941 N, false);
942 GetPairElements(Call, Lo, Hi);
943 }
944
ExpandFloatRes_FEXP2(SDNode * N,SDValue & Lo,SDValue & Hi)945 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
946 SDValue &Lo, SDValue &Hi) {
947 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
948 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
949 RTLIB::EXP2_F80, RTLIB::EXP2_F128,
950 RTLIB::EXP2_PPCF128),
951 N, false);
952 GetPairElements(Call, Lo, Hi);
953 }
954
ExpandFloatRes_FFLOOR(SDNode * N,SDValue & Lo,SDValue & Hi)955 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
956 SDValue &Lo, SDValue &Hi) {
957 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
958 RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
959 RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
960 RTLIB::FLOOR_PPCF128),
961 N, false);
962 GetPairElements(Call, Lo, Hi);
963 }
964
ExpandFloatRes_FLOG(SDNode * N,SDValue & Lo,SDValue & Hi)965 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
966 SDValue &Lo, SDValue &Hi) {
967 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
968 RTLIB::LOG_F32, RTLIB::LOG_F64,
969 RTLIB::LOG_F80, RTLIB::LOG_F128,
970 RTLIB::LOG_PPCF128),
971 N, false);
972 GetPairElements(Call, Lo, Hi);
973 }
974
ExpandFloatRes_FLOG2(SDNode * N,SDValue & Lo,SDValue & Hi)975 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
976 SDValue &Lo, SDValue &Hi) {
977 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
978 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
979 RTLIB::LOG2_F80, RTLIB::LOG2_F128,
980 RTLIB::LOG2_PPCF128),
981 N, false);
982 GetPairElements(Call, Lo, Hi);
983 }
984
ExpandFloatRes_FLOG10(SDNode * N,SDValue & Lo,SDValue & Hi)985 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
986 SDValue &Lo, SDValue &Hi) {
987 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
988 RTLIB::LOG10_F32, RTLIB::LOG10_F64,
989 RTLIB::LOG10_F80, RTLIB::LOG10_F128,
990 RTLIB::LOG10_PPCF128),
991 N, false);
992 GetPairElements(Call, Lo, Hi);
993 }
994
ExpandFloatRes_FMA(SDNode * N,SDValue & Lo,SDValue & Hi)995 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
996 SDValue &Hi) {
997 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
998 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
999 RTLIB::FMA_F32,
1000 RTLIB::FMA_F64,
1001 RTLIB::FMA_F80,
1002 RTLIB::FMA_F128,
1003 RTLIB::FMA_PPCF128),
1004 N->getValueType(0), Ops, 3, false,
1005 SDLoc(N)).first;
1006 GetPairElements(Call, Lo, Hi);
1007 }
1008
ExpandFloatRes_FMUL(SDNode * N,SDValue & Lo,SDValue & Hi)1009 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1010 SDValue &Hi) {
1011 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1012 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1013 RTLIB::MUL_F32,
1014 RTLIB::MUL_F64,
1015 RTLIB::MUL_F80,
1016 RTLIB::MUL_F128,
1017 RTLIB::MUL_PPCF128),
1018 N->getValueType(0), Ops, 2, false,
1019 SDLoc(N)).first;
1020 GetPairElements(Call, Lo, Hi);
1021 }
1022
ExpandFloatRes_FNEARBYINT(SDNode * N,SDValue & Lo,SDValue & Hi)1023 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1024 SDValue &Lo, SDValue &Hi) {
1025 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1026 RTLIB::NEARBYINT_F32,
1027 RTLIB::NEARBYINT_F64,
1028 RTLIB::NEARBYINT_F80,
1029 RTLIB::NEARBYINT_F128,
1030 RTLIB::NEARBYINT_PPCF128),
1031 N, false);
1032 GetPairElements(Call, Lo, Hi);
1033 }
1034
ExpandFloatRes_FNEG(SDNode * N,SDValue & Lo,SDValue & Hi)1035 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1036 SDValue &Hi) {
1037 SDLoc dl(N);
1038 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1039 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1040 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1041 }
1042
ExpandFloatRes_FP_EXTEND(SDNode * N,SDValue & Lo,SDValue & Hi)1043 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1044 SDValue &Hi) {
1045 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1046 Hi = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), NVT, N->getOperand(0));
1047 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1048 APInt(NVT.getSizeInBits(), 0)), NVT);
1049 }
1050
ExpandFloatRes_FPOW(SDNode * N,SDValue & Lo,SDValue & Hi)1051 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1052 SDValue &Lo, SDValue &Hi) {
1053 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1054 RTLIB::POW_F32, RTLIB::POW_F64,
1055 RTLIB::POW_F80, RTLIB::POW_F128,
1056 RTLIB::POW_PPCF128),
1057 N, false);
1058 GetPairElements(Call, Lo, Hi);
1059 }
1060
ExpandFloatRes_FPOWI(SDNode * N,SDValue & Lo,SDValue & Hi)1061 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1062 SDValue &Lo, SDValue &Hi) {
1063 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1064 RTLIB::POWI_F32, RTLIB::POWI_F64,
1065 RTLIB::POWI_F80, RTLIB::POWI_F128,
1066 RTLIB::POWI_PPCF128),
1067 N, false);
1068 GetPairElements(Call, Lo, Hi);
1069 }
1070
ExpandFloatRes_FREM(SDNode * N,SDValue & Lo,SDValue & Hi)1071 void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1072 SDValue &Lo, SDValue &Hi) {
1073 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1074 RTLIB::REM_F32, RTLIB::REM_F64,
1075 RTLIB::REM_F80, RTLIB::REM_F128,
1076 RTLIB::REM_PPCF128),
1077 N, false);
1078 GetPairElements(Call, Lo, Hi);
1079 }
1080
ExpandFloatRes_FRINT(SDNode * N,SDValue & Lo,SDValue & Hi)1081 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1082 SDValue &Lo, SDValue &Hi) {
1083 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1084 RTLIB::RINT_F32, RTLIB::RINT_F64,
1085 RTLIB::RINT_F80, RTLIB::RINT_F128,
1086 RTLIB::RINT_PPCF128),
1087 N, false);
1088 GetPairElements(Call, Lo, Hi);
1089 }
1090
ExpandFloatRes_FROUND(SDNode * N,SDValue & Lo,SDValue & Hi)1091 void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1092 SDValue &Lo, SDValue &Hi) {
1093 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1094 RTLIB::ROUND_F32,
1095 RTLIB::ROUND_F64,
1096 RTLIB::ROUND_F80,
1097 RTLIB::ROUND_F128,
1098 RTLIB::ROUND_PPCF128),
1099 N, false);
1100 GetPairElements(Call, Lo, Hi);
1101 }
1102
ExpandFloatRes_FSIN(SDNode * N,SDValue & Lo,SDValue & Hi)1103 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1104 SDValue &Lo, SDValue &Hi) {
1105 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1106 RTLIB::SIN_F32, RTLIB::SIN_F64,
1107 RTLIB::SIN_F80, RTLIB::SIN_F128,
1108 RTLIB::SIN_PPCF128),
1109 N, false);
1110 GetPairElements(Call, Lo, Hi);
1111 }
1112
ExpandFloatRes_FSQRT(SDNode * N,SDValue & Lo,SDValue & Hi)1113 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1114 SDValue &Lo, SDValue &Hi) {
1115 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1116 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1117 RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1118 RTLIB::SQRT_PPCF128),
1119 N, false);
1120 GetPairElements(Call, Lo, Hi);
1121 }
1122
ExpandFloatRes_FSUB(SDNode * N,SDValue & Lo,SDValue & Hi)1123 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1124 SDValue &Hi) {
1125 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1126 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1127 RTLIB::SUB_F32,
1128 RTLIB::SUB_F64,
1129 RTLIB::SUB_F80,
1130 RTLIB::SUB_F128,
1131 RTLIB::SUB_PPCF128),
1132 N->getValueType(0), Ops, 2, false,
1133 SDLoc(N)).first;
1134 GetPairElements(Call, Lo, Hi);
1135 }
1136
ExpandFloatRes_FTRUNC(SDNode * N,SDValue & Lo,SDValue & Hi)1137 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1138 SDValue &Lo, SDValue &Hi) {
1139 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1140 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1141 RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1142 RTLIB::TRUNC_PPCF128),
1143 N, false);
1144 GetPairElements(Call, Lo, Hi);
1145 }
1146
ExpandFloatRes_LOAD(SDNode * N,SDValue & Lo,SDValue & Hi)1147 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1148 SDValue &Hi) {
1149 if (ISD::isNormalLoad(N)) {
1150 ExpandRes_NormalLoad(N, Lo, Hi);
1151 return;
1152 }
1153
1154 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1155 LoadSDNode *LD = cast<LoadSDNode>(N);
1156 SDValue Chain = LD->getChain();
1157 SDValue Ptr = LD->getBasePtr();
1158 SDLoc dl(N);
1159
1160 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1161 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1162 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1163
1164 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1165 LD->getMemoryVT(), LD->getMemOperand());
1166
1167 // Remember the chain.
1168 Chain = Hi.getValue(1);
1169
1170 // The low part is zero.
1171 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1172 APInt(NVT.getSizeInBits(), 0)), NVT);
1173
1174 // Modified the chain - switch anything that used the old chain to use the
1175 // new one.
1176 ReplaceValueWith(SDValue(LD, 1), Chain);
1177 }
1178
ExpandFloatRes_XINT_TO_FP(SDNode * N,SDValue & Lo,SDValue & Hi)1179 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1180 SDValue &Hi) {
1181 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1182 EVT VT = N->getValueType(0);
1183 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1184 SDValue Src = N->getOperand(0);
1185 EVT SrcVT = Src.getValueType();
1186 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1187 SDLoc dl(N);
1188
1189 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1190 // When promoting partial word types to i32 we must honor the signedness,
1191 // though.
1192 if (SrcVT.bitsLE(MVT::i32)) {
1193 // The integer can be represented exactly in an f64.
1194 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1195 MVT::i32, Src);
1196 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1197 APInt(NVT.getSizeInBits(), 0)), NVT);
1198 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1199 } else {
1200 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1201 if (SrcVT.bitsLE(MVT::i64)) {
1202 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1203 MVT::i64, Src);
1204 LC = RTLIB::SINTTOFP_I64_PPCF128;
1205 } else if (SrcVT.bitsLE(MVT::i128)) {
1206 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1207 LC = RTLIB::SINTTOFP_I128_PPCF128;
1208 }
1209 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1210
1211 Hi = TLI.makeLibCall(DAG, LC, VT, &Src, 1, true, dl).first;
1212 GetPairElements(Hi, Lo, Hi);
1213 }
1214
1215 if (isSigned)
1216 return;
1217
1218 // Unsigned - fix up the SINT_TO_FP value just calculated.
1219 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1220 SrcVT = Src.getValueType();
1221
1222 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1223 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1224 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1225 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1226 ArrayRef<uint64_t> Parts;
1227
1228 switch (SrcVT.getSimpleVT().SimpleTy) {
1229 default:
1230 llvm_unreachable("Unsupported UINT_TO_FP!");
1231 case MVT::i32:
1232 Parts = TwoE32;
1233 break;
1234 case MVT::i64:
1235 Parts = TwoE64;
1236 break;
1237 case MVT::i128:
1238 Parts = TwoE128;
1239 break;
1240 }
1241
1242 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1243 DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble,
1244 APInt(128, Parts)),
1245 MVT::ppcf128));
1246 Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, SrcVT),
1247 Lo, Hi, ISD::SETLT);
1248 GetPairElements(Lo, Lo, Hi);
1249 }
1250
1251
1252 //===----------------------------------------------------------------------===//
1253 // Float Operand Expansion
1254 //===----------------------------------------------------------------------===//
1255
1256 /// ExpandFloatOperand - This method is called when the specified operand of the
1257 /// specified node is found to need expansion. At this point, all of the result
1258 /// types of the node are known to be legal, but other operands of the node may
1259 /// need promotion or expansion as well as the specified one.
ExpandFloatOperand(SDNode * N,unsigned OpNo)1260 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1261 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1262 SDValue Res = SDValue();
1263
1264 // See if the target wants to custom expand this node.
1265 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1266 return false;
1267
1268 switch (N->getOpcode()) {
1269 default:
1270 #ifndef NDEBUG
1271 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1272 N->dump(&DAG); dbgs() << "\n";
1273 #endif
1274 llvm_unreachable("Do not know how to expand this operator's operand!");
1275
1276 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1277 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1278 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1279
1280 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1281 case ISD::FCOPYSIGN: Res = ExpandFloatOp_FCOPYSIGN(N); break;
1282 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1283 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1284 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1285 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1286 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1287 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1288 OpNo); break;
1289 }
1290
1291 // If the result is null, the sub-method took care of registering results etc.
1292 if (!Res.getNode()) return false;
1293
1294 // If the result is N, the sub-method updated N in place. Tell the legalizer
1295 // core about this.
1296 if (Res.getNode() == N)
1297 return true;
1298
1299 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1300 "Invalid operand expansion");
1301
1302 ReplaceValueWith(SDValue(N, 0), Res);
1303 return false;
1304 }
1305
1306 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1307 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
FloatExpandSetCCOperands(SDValue & NewLHS,SDValue & NewRHS,ISD::CondCode & CCCode,SDLoc dl)1308 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1309 SDValue &NewRHS,
1310 ISD::CondCode &CCCode,
1311 SDLoc dl) {
1312 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1313 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1314 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1315
1316 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1317
1318 // FIXME: This generated code sucks. We want to generate
1319 // FCMPU crN, hi1, hi2
1320 // BNE crN, L:
1321 // FCMPU crN, lo1, lo2
1322 // The following can be improved, but not that much.
1323 SDValue Tmp1, Tmp2, Tmp3;
1324 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1325 LHSHi, RHSHi, ISD::SETOEQ);
1326 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1327 LHSLo, RHSLo, CCCode);
1328 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1329 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1330 LHSHi, RHSHi, ISD::SETUNE);
1331 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1332 LHSHi, RHSHi, CCCode);
1333 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1334 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1335 NewRHS = SDValue(); // LHS is the result, not a compare.
1336 }
1337
ExpandFloatOp_BR_CC(SDNode * N)1338 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1339 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1340 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1341 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1342
1343 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1344 // against zero to select between true and false values.
1345 if (!NewRHS.getNode()) {
1346 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1347 CCCode = ISD::SETNE;
1348 }
1349
1350 // Update N to have the operands specified.
1351 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1352 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1353 N->getOperand(4)), 0);
1354 }
1355
ExpandFloatOp_FCOPYSIGN(SDNode * N)1356 SDValue DAGTypeLegalizer::ExpandFloatOp_FCOPYSIGN(SDNode *N) {
1357 assert(N->getOperand(1).getValueType() == MVT::ppcf128 &&
1358 "Logic only correct for ppcf128!");
1359 SDValue Lo, Hi;
1360 GetExpandedFloat(N->getOperand(1), Lo, Hi);
1361 // The ppcf128 value is providing only the sign; take it from the
1362 // higher-order double (which must have the larger magnitude).
1363 return DAG.getNode(ISD::FCOPYSIGN, SDLoc(N),
1364 N->getValueType(0), N->getOperand(0), Hi);
1365 }
1366
ExpandFloatOp_FP_ROUND(SDNode * N)1367 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1368 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1369 "Logic only correct for ppcf128!");
1370 SDValue Lo, Hi;
1371 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1372 // Round it the rest of the way (e.g. to f32) if needed.
1373 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1374 N->getValueType(0), Hi, N->getOperand(1));
1375 }
1376
ExpandFloatOp_FP_TO_SINT(SDNode * N)1377 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1378 EVT RVT = N->getValueType(0);
1379 SDLoc dl(N);
1380
1381 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1382 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1383 if (RVT == MVT::i32) {
1384 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1385 "Logic only correct for ppcf128!");
1386 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1387 N->getOperand(0), DAG.getValueType(MVT::f64));
1388 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1389 DAG.getIntPtrConstant(1));
1390 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1391 }
1392
1393 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1394 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1395 return TLI.makeLibCall(DAG, LC, RVT, &N->getOperand(0), 1, false, dl).first;
1396 }
1397
ExpandFloatOp_FP_TO_UINT(SDNode * N)1398 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1399 EVT RVT = N->getValueType(0);
1400 SDLoc dl(N);
1401
1402 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1403 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1404 if (RVT == MVT::i32) {
1405 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1406 "Logic only correct for ppcf128!");
1407 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1408 APFloat APF = APFloat(APFloat::PPCDoubleDouble, APInt(128, TwoE31));
1409 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1410 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1411 // FIXME: generated code sucks.
1412 return DAG.getSelectCC(dl, N->getOperand(0), Tmp,
1413 DAG.getNode(ISD::ADD, dl, MVT::i32,
1414 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1415 DAG.getNode(ISD::FSUB, dl,
1416 MVT::ppcf128,
1417 N->getOperand(0),
1418 Tmp)),
1419 DAG.getConstant(0x80000000, MVT::i32)),
1420 DAG.getNode(ISD::FP_TO_SINT, dl,
1421 MVT::i32, N->getOperand(0)),
1422 ISD::SETGE);
1423 }
1424
1425 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1426 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1427 return TLI.makeLibCall(DAG, LC, N->getValueType(0), &N->getOperand(0), 1,
1428 false, dl).first;
1429 }
1430
ExpandFloatOp_SELECT_CC(SDNode * N)1431 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1432 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1433 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1434 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1435
1436 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1437 // against zero to select between true and false values.
1438 if (!NewRHS.getNode()) {
1439 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1440 CCCode = ISD::SETNE;
1441 }
1442
1443 // Update N to have the operands specified.
1444 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1445 N->getOperand(2), N->getOperand(3),
1446 DAG.getCondCode(CCCode)), 0);
1447 }
1448
ExpandFloatOp_SETCC(SDNode * N)1449 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1450 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1451 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1452 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1453
1454 // If ExpandSetCCOperands returned a scalar, use it.
1455 if (!NewRHS.getNode()) {
1456 assert(NewLHS.getValueType() == N->getValueType(0) &&
1457 "Unexpected setcc expansion!");
1458 return NewLHS;
1459 }
1460
1461 // Otherwise, update N to have the operands specified.
1462 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1463 DAG.getCondCode(CCCode)), 0);
1464 }
1465
ExpandFloatOp_STORE(SDNode * N,unsigned OpNo)1466 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1467 if (ISD::isNormalStore(N))
1468 return ExpandOp_NormalStore(N, OpNo);
1469
1470 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1471 assert(OpNo == 1 && "Can only expand the stored value so far");
1472 StoreSDNode *ST = cast<StoreSDNode>(N);
1473
1474 SDValue Chain = ST->getChain();
1475 SDValue Ptr = ST->getBasePtr();
1476
1477 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1478 ST->getValue().getValueType());
1479 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1480 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1481 (void)NVT;
1482
1483 SDValue Lo, Hi;
1484 GetExpandedOp(ST->getValue(), Lo, Hi);
1485
1486 return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1487 ST->getMemoryVT(), ST->getMemOperand());
1488 }
1489