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[InstCombine] Signed saturation patterns
[llvm-complete.git] / lib / CodeGen / SelectionDAG / LegalizeFloatTypes.cpp
blob72d052473f1155127392e89f4037833009fce349
1 //===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file implements float type expansion and softening for LegalizeTypes.
10 // Softening is the act of turning a computation in an illegal floating point
11 // type into a computation in an integer type of the same size; also known as
12 // "soft float". For example, turning f32 arithmetic into operations using i32.
13 // The resulting integer value is the same as what you would get by performing
14 // the floating point operation and bitcasting the result to the integer type.
15 // Expansion is the act of changing a computation in an illegal type to be a
16 // computation in two identical registers of a smaller type. For example,
17 // implementing ppcf128 arithmetic in two f64 registers.
18 //
19 //===----------------------------------------------------------------------===//
20
21 #include "LegalizeTypes.h"
22 #include "llvm/Support/ErrorHandling.h"
23 #include "llvm/Support/raw_ostream.h"
24 using namespace llvm;
25
26 #define DEBUG_TYPE "legalize-types"
27
28 /// GetFPLibCall - Return the right libcall for the given floating point type.
29 static RTLIB::Libcall GetFPLibCall(EVT VT,
30 RTLIB::Libcall Call_F32,
31 RTLIB::Libcall Call_F64,
32 RTLIB::Libcall Call_F80,
33 RTLIB::Libcall Call_F128,
34 RTLIB::Libcall Call_PPCF128) {
35 return
36 VT == MVT::f32 ? Call_F32 :
37 VT == MVT::f64 ? Call_F64 :
38 VT == MVT::f80 ? Call_F80 :
39 VT == MVT::f128 ? Call_F128 :
40 VT == MVT::ppcf128 ? Call_PPCF128 :
41 RTLIB::UNKNOWN_LIBCALL;
42 }
43
44 //===----------------------------------------------------------------------===//
45 // Convert Float Results to Integer
46 //===----------------------------------------------------------------------===//
47
48 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
49 LLVM_DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
50 dbgs() << "\n");
51 SDValue R = SDValue();
52
53 switch (N->getOpcode()) {
54 default:
55 #ifndef NDEBUG
56 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
57 N->dump(&DAG); dbgs() << "\n";
58 #endif
59 llvm_unreachable("Do not know how to soften the result of this operator!");
60
61 case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
62 case ISD::BITCAST: R = SoftenFloatRes_BITCAST(N); break;
63 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
64 case ISD::ConstantFP: R = SoftenFloatRes_ConstantFP(N); break;
65 case ISD::EXTRACT_VECTOR_ELT:
66 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N, ResNo); break;
67 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
68 case ISD::FMINNUM: R = SoftenFloatRes_FMINNUM(N); break;
69 case ISD::FMAXNUM: R = SoftenFloatRes_FMAXNUM(N); break;
70 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
71 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
72 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
73 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
74 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
75 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
76 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
77 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
78 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
79 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
80 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
81 case ISD::FMA: R = SoftenFloatRes_FMA(N); break;
82 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
83 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
84 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
85 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
86 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
87 case ISD::FP16_TO_FP: R = SoftenFloatRes_FP16_TO_FP(N); break;
88 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
89 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
90 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
91 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
92 case ISD::FROUND: R = SoftenFloatRes_FROUND(N); break;
93 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
94 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
95 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
96 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
97 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
98 case ISD::ATOMIC_SWAP: R = BitcastToInt_ATOMIC_SWAP(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 assert(R.getNode() != N);
110 SetSoftenedFloat(SDValue(N, ResNo), R);
111 }
112 }
113
114 SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
115 return BitConvertToInteger(N->getOperand(0));
116 }
117
118 SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
119 unsigned ResNo) {
120 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
121 return BitConvertToInteger(Op);
122 }
123
124 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
125 // Convert the inputs to integers, and build a new pair out of them.
126 return DAG.getNode(ISD::BUILD_PAIR, SDLoc(N),
127 TLI.getTypeToTransformTo(*DAG.getContext(),
128 N->getValueType(0)),
129 BitConvertToInteger(N->getOperand(0)),
130 BitConvertToInteger(N->getOperand(1)));
131 }
132
133 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(SDNode *N) {
134 ConstantFPSDNode *CN = cast<ConstantFPSDNode>(N);
135 // In ppcf128, the high 64 bits are always first in memory regardless
136 // of Endianness. LLVM's APFloat representation is not Endian sensitive,
137 // and so always converts into a 128-bit APInt in a non-Endian-sensitive
138 // way. However, APInt's are serialized in an Endian-sensitive fashion,
139 // so on big-Endian targets, the two doubles are output in the wrong
140 // order. Fix this by manually flipping the order of the high 64 bits
141 // and the low 64 bits here.
142 if (DAG.getDataLayout().isBigEndian() &&
143 CN->getValueType(0).getSimpleVT() == llvm::MVT::ppcf128) {
144 uint64_t words[2] = { CN->getValueAPF().bitcastToAPInt().getRawData()[1],
145 CN->getValueAPF().bitcastToAPInt().getRawData()[0] };
146 APInt Val(128, words);
147 return DAG.getConstant(Val, SDLoc(CN),
148 TLI.getTypeToTransformTo(*DAG.getContext(),
149 CN->getValueType(0)));
150 } else {
151 return DAG.getConstant(CN->getValueAPF().bitcastToAPInt(), SDLoc(CN),
152 TLI.getTypeToTransformTo(*DAG.getContext(),
153 CN->getValueType(0)));
154 }
155 }
156
157 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N, unsigned ResNo) {
158 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
159 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
160 NewOp.getValueType().getVectorElementType(),
161 NewOp, N->getOperand(1));
162 }
163
164 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
165 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
166 unsigned Size = NVT.getSizeInBits();
167
168 // Mask = ~(1 << (Size-1))
169 APInt API = APInt::getAllOnesValue(Size);
170 API.clearBit(Size - 1);
171 SDValue Mask = DAG.getConstant(API, SDLoc(N), NVT);
172 SDValue Op = GetSoftenedFloat(N->getOperand(0));
173 return DAG.getNode(ISD::AND, SDLoc(N), NVT, Op, Mask);
174 }
175
176 SDValue DAGTypeLegalizer::SoftenFloatRes_FMINNUM(SDNode *N) {
177 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
178 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
179 GetSoftenedFloat(N->getOperand(1)) };
180 TargetLowering::MakeLibCallOptions CallOptions;
181 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
182 N->getOperand(1).getValueType() };
183 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
184 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
185 RTLIB::FMIN_F32,
186 RTLIB::FMIN_F64,
187 RTLIB::FMIN_F80,
188 RTLIB::FMIN_F128,
189 RTLIB::FMIN_PPCF128),
190 NVT, Ops, CallOptions, SDLoc(N)).first;
191 }
192
193 SDValue DAGTypeLegalizer::SoftenFloatRes_FMAXNUM(SDNode *N) {
194 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
195 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
196 GetSoftenedFloat(N->getOperand(1)) };
197 TargetLowering::MakeLibCallOptions CallOptions;
198 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
199 N->getOperand(1).getValueType() };
200 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
201 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
202 RTLIB::FMAX_F32,
203 RTLIB::FMAX_F64,
204 RTLIB::FMAX_F80,
205 RTLIB::FMAX_F128,
206 RTLIB::FMAX_PPCF128),
207 NVT, Ops, CallOptions, SDLoc(N)).first;
208 }
209
210 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
211 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
212 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
213 GetSoftenedFloat(N->getOperand(1)) };
214 TargetLowering::MakeLibCallOptions CallOptions;
215 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
216 N->getOperand(1).getValueType() };
217 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
218 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
219 RTLIB::ADD_F32,
220 RTLIB::ADD_F64,
221 RTLIB::ADD_F80,
222 RTLIB::ADD_F128,
223 RTLIB::ADD_PPCF128),
224 NVT, Ops, CallOptions, SDLoc(N)).first;
225 }
226
227 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
228 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
229 SDValue Op = GetSoftenedFloat(N->getOperand(0));
230 TargetLowering::MakeLibCallOptions CallOptions;
231 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
232 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
233 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
234 RTLIB::CEIL_F32,
235 RTLIB::CEIL_F64,
236 RTLIB::CEIL_F80,
237 RTLIB::CEIL_F128,
238 RTLIB::CEIL_PPCF128),
239 NVT, Op, CallOptions, SDLoc(N)).first;
240 }
241
242 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
243 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
244 SDValue RHS = BitConvertToInteger(N->getOperand(1));
245 SDLoc dl(N);
246
247 EVT LVT = LHS.getValueType();
248 EVT RVT = RHS.getValueType();
249
250 unsigned LSize = LVT.getSizeInBits();
251 unsigned RSize = RVT.getSizeInBits();
252
253 // First get the sign bit of second operand.
254 SDValue SignBit = DAG.getNode(
255 ISD::SHL, dl, RVT, DAG.getConstant(1, dl, RVT),
256 DAG.getConstant(RSize - 1, dl,
257 TLI.getShiftAmountTy(RVT, DAG.getDataLayout())));
258 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
259
260 // Shift right or sign-extend it if the two operands have different types.
261 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
262 if (SizeDiff > 0) {
263 SignBit =
264 DAG.getNode(ISD::SRL, dl, RVT, SignBit,
265 DAG.getConstant(SizeDiff, dl,
266 TLI.getShiftAmountTy(SignBit.getValueType(),
267 DAG.getDataLayout())));
268 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
269 } else if (SizeDiff < 0) {
270 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
271 SignBit =
272 DAG.getNode(ISD::SHL, dl, LVT, SignBit,
273 DAG.getConstant(-SizeDiff, dl,
274 TLI.getShiftAmountTy(SignBit.getValueType(),
275 DAG.getDataLayout())));
276 }
277
278 // Clear the sign bit of the first operand.
279 SDValue Mask = DAG.getNode(
280 ISD::SHL, dl, LVT, DAG.getConstant(1, dl, LVT),
281 DAG.getConstant(LSize - 1, dl,
282 TLI.getShiftAmountTy(LVT, DAG.getDataLayout())));
283 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, dl, LVT));
284 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
285
286 // Or the value with the sign bit.
287 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
288 }
289
290 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
291 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
292 SDValue Op = GetSoftenedFloat(N->getOperand(0));
293 TargetLowering::MakeLibCallOptions CallOptions;
294 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
295 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
296 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
297 RTLIB::COS_F32,
298 RTLIB::COS_F64,
299 RTLIB::COS_F80,
300 RTLIB::COS_F128,
301 RTLIB::COS_PPCF128),
302 NVT, Op, CallOptions, SDLoc(N)).first;
303 }
304
305 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
306 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
307 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
308 GetSoftenedFloat(N->getOperand(1)) };
309 TargetLowering::MakeLibCallOptions CallOptions;
310 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
311 N->getOperand(1).getValueType() };
312 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
313 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
314 RTLIB::DIV_F32,
315 RTLIB::DIV_F64,
316 RTLIB::DIV_F80,
317 RTLIB::DIV_F128,
318 RTLIB::DIV_PPCF128),
319 NVT, Ops, CallOptions, SDLoc(N)).first;
320 }
321
322 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
323 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
324 SDValue Op = GetSoftenedFloat(N->getOperand(0));
325 TargetLowering::MakeLibCallOptions CallOptions;
326 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
327 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
328 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
329 RTLIB::EXP_F32,
330 RTLIB::EXP_F64,
331 RTLIB::EXP_F80,
332 RTLIB::EXP_F128,
333 RTLIB::EXP_PPCF128),
334 NVT, Op, CallOptions, SDLoc(N)).first;
335 }
336
337 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
338 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
339 SDValue Op = GetSoftenedFloat(N->getOperand(0));
340 TargetLowering::MakeLibCallOptions CallOptions;
341 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
342 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
343 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
344 RTLIB::EXP2_F32,
345 RTLIB::EXP2_F64,
346 RTLIB::EXP2_F80,
347 RTLIB::EXP2_F128,
348 RTLIB::EXP2_PPCF128),
349 NVT, Op, CallOptions, SDLoc(N)).first;
350 }
351
352 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
353 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
354 SDValue Op = GetSoftenedFloat(N->getOperand(0));
355 TargetLowering::MakeLibCallOptions CallOptions;
356 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
357 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
358 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
359 RTLIB::FLOOR_F32,
360 RTLIB::FLOOR_F64,
361 RTLIB::FLOOR_F80,
362 RTLIB::FLOOR_F128,
363 RTLIB::FLOOR_PPCF128),
364 NVT, Op, CallOptions, SDLoc(N)).first;
365 }
366
367 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
368 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
369 SDValue Op = GetSoftenedFloat(N->getOperand(0));
370 TargetLowering::MakeLibCallOptions CallOptions;
371 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
372 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
373 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
374 RTLIB::LOG_F32,
375 RTLIB::LOG_F64,
376 RTLIB::LOG_F80,
377 RTLIB::LOG_F128,
378 RTLIB::LOG_PPCF128),
379 NVT, Op, CallOptions, SDLoc(N)).first;
380 }
381
382 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
383 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
384 SDValue Op = GetSoftenedFloat(N->getOperand(0));
385 TargetLowering::MakeLibCallOptions CallOptions;
386 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
387 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
388 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
389 RTLIB::LOG2_F32,
390 RTLIB::LOG2_F64,
391 RTLIB::LOG2_F80,
392 RTLIB::LOG2_F128,
393 RTLIB::LOG2_PPCF128),
394 NVT, Op, CallOptions, SDLoc(N)).first;
395 }
396
397 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
398 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
399 SDValue Op = GetSoftenedFloat(N->getOperand(0));
400 TargetLowering::MakeLibCallOptions CallOptions;
401 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
402 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
403 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
404 RTLIB::LOG10_F32,
405 RTLIB::LOG10_F64,
406 RTLIB::LOG10_F80,
407 RTLIB::LOG10_F128,
408 RTLIB::LOG10_PPCF128),
409 NVT, Op, CallOptions, SDLoc(N)).first;
410 }
411
412 SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
413 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
414 SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
415 GetSoftenedFloat(N->getOperand(1)),
416 GetSoftenedFloat(N->getOperand(2)) };
417 TargetLowering::MakeLibCallOptions CallOptions;
418 EVT OpsVT[3] = { N->getOperand(0).getValueType(),
419 N->getOperand(1).getValueType(),
420 N->getOperand(2).getValueType() };
421 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
422 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
423 RTLIB::FMA_F32,
424 RTLIB::FMA_F64,
425 RTLIB::FMA_F80,
426 RTLIB::FMA_F128,
427 RTLIB::FMA_PPCF128),
428 NVT, Ops, CallOptions, SDLoc(N)).first;
429 }
430
431 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
432 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
433 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
434 GetSoftenedFloat(N->getOperand(1)) };
435 TargetLowering::MakeLibCallOptions CallOptions;
436 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
437 N->getOperand(1).getValueType() };
438 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
439 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
440 RTLIB::MUL_F32,
441 RTLIB::MUL_F64,
442 RTLIB::MUL_F80,
443 RTLIB::MUL_F128,
444 RTLIB::MUL_PPCF128),
445 NVT, Ops, CallOptions, SDLoc(N)).first;
446 }
447
448 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
449 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
450 SDValue Op = GetSoftenedFloat(N->getOperand(0));
451 TargetLowering::MakeLibCallOptions CallOptions;
452 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
453 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
454 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
455 RTLIB::NEARBYINT_F32,
456 RTLIB::NEARBYINT_F64,
457 RTLIB::NEARBYINT_F80,
458 RTLIB::NEARBYINT_F128,
459 RTLIB::NEARBYINT_PPCF128),
460 NVT, Op, CallOptions, SDLoc(N)).first;
461 }
462
463 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
464 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
465 SDLoc dl(N);
466
467 EVT FloatVT = N->getValueType(0);
468 if (FloatVT == MVT::f32 || FloatVT == MVT::f64 || FloatVT == MVT::f128) {
469 // Expand Y = FNEG(X) -> Y = X ^ sign mask
470 APInt SignMask = APInt::getSignMask(NVT.getSizeInBits());
471 return DAG.getNode(ISD::XOR, dl, NVT, GetSoftenedFloat(N->getOperand(0)),
472 DAG.getConstant(SignMask, dl, NVT));
473 }
474
475 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
476 SDValue Ops[2] = { DAG.getConstantFP(-0.0, dl, N->getValueType(0)),
477 GetSoftenedFloat(N->getOperand(0)) };
478 TargetLowering::MakeLibCallOptions CallOptions;
479 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
480 RTLIB::SUB_F32,
481 RTLIB::SUB_F64,
482 RTLIB::SUB_F80,
483 RTLIB::SUB_F128,
484 RTLIB::SUB_PPCF128),
485 NVT, Ops, CallOptions, dl).first;
486 }
487
488 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
489 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
490 SDValue Op = N->getOperand(0);
491
492 // There's only a libcall for f16 -> f32, so proceed in two stages. Also, it's
493 // entirely possible for both f16 and f32 to be legal, so use the fully
494 // hard-float FP_EXTEND rather than FP16_TO_FP.
495 if (Op.getValueType() == MVT::f16 && N->getValueType(0) != MVT::f32) {
496 Op = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), MVT::f32, Op);
497 if (getTypeAction(MVT::f32) == TargetLowering::TypeSoftenFloat)
498 AddToWorklist(Op.getNode());
499 }
500
501 if (getTypeAction(Op.getValueType()) == TargetLowering::TypePromoteFloat) {
502 Op = GetPromotedFloat(Op);
503 // If the promotion did the FP_EXTEND to the destination type for us,
504 // there's nothing left to do here.
505 if (Op.getValueType() == N->getValueType(0)) {
506 return BitConvertToInteger(Op);
507 }
508 }
509
510 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
511 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
512 TargetLowering::MakeLibCallOptions CallOptions;
513 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
514 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
515 return TLI.makeLibCall(DAG, LC, NVT, Op, CallOptions, SDLoc(N)).first;
516 }
517
518 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
519 // nodes?
520 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP(SDNode *N) {
521 EVT MidVT = TLI.getTypeToTransformTo(*DAG.getContext(), MVT::f32);
522 SDValue Op = N->getOperand(0);
523 TargetLowering::MakeLibCallOptions CallOptions;
524 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
525 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
526 SDValue Res32 = TLI.makeLibCall(DAG, RTLIB::FPEXT_F16_F32, MidVT, Op,
527 CallOptions, SDLoc(N)).first;
528 if (N->getValueType(0) == MVT::f32)
529 return Res32;
530
531 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
532 RTLIB::Libcall LC = RTLIB::getFPEXT(MVT::f32, N->getValueType(0));
533 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
534 return TLI.makeLibCall(DAG, LC, NVT, Res32, CallOptions, SDLoc(N)).first;
535 }
536
537 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
538 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
539 SDValue Op = N->getOperand(0);
540 if (N->getValueType(0) == MVT::f16) {
541 // Semi-soften first, to FP_TO_FP16, so that targets which support f16 as a
542 // storage-only type get a chance to select things.
543 return DAG.getNode(ISD::FP_TO_FP16, SDLoc(N), NVT, Op);
544 }
545
546 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
547 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
548 TargetLowering::MakeLibCallOptions CallOptions;
549 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
550 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
551 return TLI.makeLibCall(DAG, LC, NVT, Op, CallOptions, SDLoc(N)).first;
552 }
553
554 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
555 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
556 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
557 GetSoftenedFloat(N->getOperand(1)) };
558 TargetLowering::MakeLibCallOptions CallOptions;
559 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
560 N->getOperand(1).getValueType() };
561 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
562 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
563 RTLIB::POW_F32,
564 RTLIB::POW_F64,
565 RTLIB::POW_F80,
566 RTLIB::POW_F128,
567 RTLIB::POW_PPCF128),
568 NVT, Ops, CallOptions, SDLoc(N)).first;
569 }
570
571 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
572 assert(N->getOperand(1).getValueType() == MVT::i32 &&
573 "Unsupported power type!");
574 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
575 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
576 TargetLowering::MakeLibCallOptions CallOptions;
577 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
578 N->getOperand(1).getValueType() };
579 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
580 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
581 RTLIB::POWI_F32,
582 RTLIB::POWI_F64,
583 RTLIB::POWI_F80,
584 RTLIB::POWI_F128,
585 RTLIB::POWI_PPCF128),
586 NVT, Ops, CallOptions, SDLoc(N)).first;
587 }
588
589 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
590 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
591 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
592 GetSoftenedFloat(N->getOperand(1)) };
593 TargetLowering::MakeLibCallOptions CallOptions;
594 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
595 N->getOperand(1).getValueType() };
596 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
597 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
598 RTLIB::REM_F32,
599 RTLIB::REM_F64,
600 RTLIB::REM_F80,
601 RTLIB::REM_F128,
602 RTLIB::REM_PPCF128),
603 NVT, Ops, CallOptions, SDLoc(N)).first;
604 }
605
606 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
607 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
608 SDValue Op = GetSoftenedFloat(N->getOperand(0));
609 TargetLowering::MakeLibCallOptions CallOptions;
610 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
611 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
612 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
613 RTLIB::RINT_F32,
614 RTLIB::RINT_F64,
615 RTLIB::RINT_F80,
616 RTLIB::RINT_F128,
617 RTLIB::RINT_PPCF128),
618 NVT, Op, CallOptions, SDLoc(N)).first;
619 }
620
621 SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
622 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
623 SDValue Op = GetSoftenedFloat(N->getOperand(0));
624 TargetLowering::MakeLibCallOptions CallOptions;
625 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
626 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
627 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
628 RTLIB::ROUND_F32,
629 RTLIB::ROUND_F64,
630 RTLIB::ROUND_F80,
631 RTLIB::ROUND_F128,
632 RTLIB::ROUND_PPCF128),
633 NVT, Op, CallOptions, SDLoc(N)).first;
634 }
635
636 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
637 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
638 SDValue Op = GetSoftenedFloat(N->getOperand(0));
639 TargetLowering::MakeLibCallOptions CallOptions;
640 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
641 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
642 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
643 RTLIB::SIN_F32,
644 RTLIB::SIN_F64,
645 RTLIB::SIN_F80,
646 RTLIB::SIN_F128,
647 RTLIB::SIN_PPCF128),
648 NVT, Op, CallOptions, SDLoc(N)).first;
649 }
650
651 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
652 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
653 SDValue Op = GetSoftenedFloat(N->getOperand(0));
654 TargetLowering::MakeLibCallOptions CallOptions;
655 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
656 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
657 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
658 RTLIB::SQRT_F32,
659 RTLIB::SQRT_F64,
660 RTLIB::SQRT_F80,
661 RTLIB::SQRT_F128,
662 RTLIB::SQRT_PPCF128),
663 NVT, Op, CallOptions, SDLoc(N)).first;
664 }
665
666 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
667 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
668 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
669 GetSoftenedFloat(N->getOperand(1)) };
670 TargetLowering::MakeLibCallOptions CallOptions;
671 EVT OpsVT[2] = { N->getOperand(0).getValueType(),
672 N->getOperand(1).getValueType() };
673 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
674 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
675 RTLIB::SUB_F32,
676 RTLIB::SUB_F64,
677 RTLIB::SUB_F80,
678 RTLIB::SUB_F128,
679 RTLIB::SUB_PPCF128),
680 NVT, Ops, CallOptions, SDLoc(N)).first;
681 }
682
683 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
684 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
685 if (N->getValueType(0) == MVT::f16)
686 return DAG.getNode(ISD::FP_TO_FP16, SDLoc(N), NVT, N->getOperand(0));
687
688 SDValue Op = GetSoftenedFloat(N->getOperand(0));
689 TargetLowering::MakeLibCallOptions CallOptions;
690 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
691 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
692 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
693 RTLIB::TRUNC_F32,
694 RTLIB::TRUNC_F64,
695 RTLIB::TRUNC_F80,
696 RTLIB::TRUNC_F128,
697 RTLIB::TRUNC_PPCF128),
698 NVT, Op, CallOptions, SDLoc(N)).first;
699 }
700
701 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
702 LoadSDNode *L = cast<LoadSDNode>(N);
703 EVT VT = N->getValueType(0);
704 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
705 SDLoc dl(N);
706
707 auto MMOFlags =
708 L->getMemOperand()->getFlags() &
709 ~(MachineMemOperand::MOInvariant | MachineMemOperand::MODereferenceable);
710 SDValue NewL;
711 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
712 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(), NVT, dl,
713 L->getChain(), L->getBasePtr(), L->getOffset(),
714 L->getPointerInfo(), NVT, L->getAlignment(), MMOFlags,
715 L->getAAInfo());
716 // Legalized the chain result - switch anything that used the old chain to
717 // use the new one.
718 if (N != NewL.getValue(1).getNode())
719 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
720 return NewL;
721 }
722
723 // Do a non-extending load followed by FP_EXTEND.
724 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD, L->getMemoryVT(),
725 dl, L->getChain(), L->getBasePtr(), L->getOffset(),
726 L->getPointerInfo(), L->getMemoryVT(), L->getAlignment(),
727 MMOFlags, L->getAAInfo());
728 // Legalized the chain result - switch anything that used the old chain to
729 // use the new one.
730 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
731 auto ExtendNode = DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL);
732 return BitConvertToInteger(ExtendNode);
733 }
734
735 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
736 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
737 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
738 return DAG.getSelect(SDLoc(N),
739 LHS.getValueType(), N->getOperand(0), LHS, RHS);
740 }
741
742 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
743 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
744 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
745 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
746 LHS.getValueType(), N->getOperand(0),
747 N->getOperand(1), LHS, RHS, N->getOperand(4));
748 }
749
750 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
751 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
752 N->getValueType(0)));
753 }
754
755 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
756 SDValue Chain = N->getOperand(0); // Get the chain.
757 SDValue Ptr = N->getOperand(1); // Get the pointer.
758 EVT VT = N->getValueType(0);
759 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
760 SDLoc dl(N);
761
762 SDValue NewVAARG;
763 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
764 N->getConstantOperandVal(3));
765
766 // Legalized the chain result - switch anything that used the old chain to
767 // use the new one.
768 if (N != NewVAARG.getValue(1).getNode())
769 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
770 return NewVAARG;
771 }
772
773 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
774 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
775 EVT SVT = N->getOperand(0).getValueType();
776 EVT RVT = N->getValueType(0);
777 EVT NVT = EVT();
778 SDLoc dl(N);
779
780 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
781 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
782 // match. Look for an appropriate libcall.
783 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
784 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
785 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
786 NVT = (MVT::SimpleValueType)t;
787 // The source needs to big enough to hold the operand.
788 if (NVT.bitsGE(SVT))
789 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
790 }
791 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
792
793 // Sign/zero extend the argument if the libcall takes a larger type.
794 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
795 NVT, N->getOperand(0));
796 TargetLowering::MakeLibCallOptions CallOptions;
797 CallOptions.setSExt(Signed);
798 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
799 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
800 return TLI.makeLibCall(DAG, LC,
801 TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
802 Op, CallOptions, dl).first;
803 }
804
805
806 //===----------------------------------------------------------------------===//
807 // Convert Float Operand to Integer
808 //===----------------------------------------------------------------------===//
809
810 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
811 LLVM_DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
812 dbgs() << "\n");
813 SDValue Res = SDValue();
814
815 switch (N->getOpcode()) {
816 default:
817 #ifndef NDEBUG
818 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
819 N->dump(&DAG); dbgs() << "\n";
820 #endif
821 llvm_unreachable("Do not know how to soften this operator's operand!");
822
823 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
824 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
825 case ISD::FP_EXTEND: Res = SoftenFloatOp_FP_EXTEND(N); break;
826 case ISD::FP_TO_FP16: // Same as FP_ROUND for softening purposes
827 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
828 case ISD::FP_TO_SINT:
829 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_XINT(N); break;
830 case ISD::LROUND: Res = SoftenFloatOp_LROUND(N); break;
831 case ISD::LLROUND: Res = SoftenFloatOp_LLROUND(N); break;
832 case ISD::LRINT: Res = SoftenFloatOp_LRINT(N); break;
833 case ISD::LLRINT: Res = SoftenFloatOp_LLRINT(N); break;
834 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
835 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
836 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
837 }
838
839 // If the result is null, the sub-method took care of registering results etc.
840 if (!Res.getNode()) return false;
841
842 // If the result is N, the sub-method updated N in place. Tell the legalizer
843 // core about this to re-analyze.
844 if (Res.getNode() == N)
845 return true;
846
847 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
848 "Invalid operand promotion");
849
850 ReplaceValueWith(SDValue(N, 0), Res);
851 return false;
852 }
853
854 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
855 SDValue Op0 = GetSoftenedFloat(N->getOperand(0));
856
857 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0), Op0);
858 }
859
860 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_EXTEND(SDNode *N) {
861 // If we get here, the result must be legal but the source illegal.
862 EVT SVT = N->getOperand(0).getValueType();
863 EVT RVT = N->getValueType(0);
864 SDValue Op = GetSoftenedFloat(N->getOperand(0));
865
866 if (SVT == MVT::f16)
867 return DAG.getNode(ISD::FP16_TO_FP, SDLoc(N), RVT, Op);
868
869 RTLIB::Libcall LC = RTLIB::getFPEXT(SVT, RVT);
870 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND libcall");
871
872 TargetLowering::MakeLibCallOptions CallOptions;
873 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
874 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
875 return TLI.makeLibCall(DAG, LC, RVT, Op, CallOptions, SDLoc(N)).first;
876 }
877
878
879 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
880 // We actually deal with the partially-softened FP_TO_FP16 node too, which
881 // returns an i16 so doesn't meet the constraints necessary for FP_ROUND.
882 assert(N->getOpcode() == ISD::FP_ROUND || N->getOpcode() == ISD::FP_TO_FP16);
883
884 EVT SVT = N->getOperand(0).getValueType();
885 EVT RVT = N->getValueType(0);
886 EVT FloatRVT = N->getOpcode() == ISD::FP_TO_FP16 ? MVT::f16 : RVT;
887
888 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, FloatRVT);
889 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
890
891 SDValue Op = GetSoftenedFloat(N->getOperand(0));
892 TargetLowering::MakeLibCallOptions CallOptions;
893 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
894 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
895 return TLI.makeLibCall(DAG, LC, RVT, Op, CallOptions, SDLoc(N)).first;
896 }
897
898 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
899 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
900 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
901
902 EVT VT = NewLHS.getValueType();
903 NewLHS = GetSoftenedFloat(NewLHS);
904 NewRHS = GetSoftenedFloat(NewRHS);
905 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N),
906 N->getOperand(2), N->getOperand(3));
907
908 // If softenSetCCOperands returned a scalar, we need to compare the result
909 // against zero to select between true and false values.
910 if (!NewRHS.getNode()) {
911 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
912 CCCode = ISD::SETNE;
913 }
914
915 // Update N to have the operands specified.
916 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
917 DAG.getCondCode(CCCode), NewLHS, NewRHS,
918 N->getOperand(4)),
919 0);
920 }
921
922 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_XINT(SDNode *N) {
923 bool Signed = N->getOpcode() == ISD::FP_TO_SINT;
924 EVT SVT = N->getOperand(0).getValueType();
925 EVT RVT = N->getValueType(0);
926 EVT NVT = EVT();
927 SDLoc dl(N);
928
929 // If the result is not legal, eg: fp -> i1, then it needs to be promoted to
930 // a larger type, eg: fp -> i32. Even if it is legal, no libcall may exactly
931 // match, eg. we don't have fp -> i8 conversions.
932 // Look for an appropriate libcall.
933 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
934 for (unsigned IntVT = MVT::FIRST_INTEGER_VALUETYPE;
935 IntVT <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL;
936 ++IntVT) {
937 NVT = (MVT::SimpleValueType)IntVT;
938 // The type needs to big enough to hold the result.
939 if (NVT.bitsGE(RVT))
940 LC = Signed ? RTLIB::getFPTOSINT(SVT, NVT):RTLIB::getFPTOUINT(SVT, NVT);
941 }
942 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_XINT!");
943
944 SDValue Op = GetSoftenedFloat(N->getOperand(0));
945 TargetLowering::MakeLibCallOptions CallOptions;
946 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
947 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
948 SDValue Res = TLI.makeLibCall(DAG, LC, NVT, Op, CallOptions, dl).first;
949
950 // Truncate the result if the libcall returns a larger type.
951 return DAG.getNode(ISD::TRUNCATE, dl, RVT, Res);
952 }
953
954 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
955 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
956 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
957
958 EVT VT = NewLHS.getValueType();
959 NewLHS = GetSoftenedFloat(NewLHS);
960 NewRHS = GetSoftenedFloat(NewRHS);
961 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N),
962 N->getOperand(0), N->getOperand(1));
963
964 // If softenSetCCOperands returned a scalar, we need to compare the result
965 // against zero to select between true and false values.
966 if (!NewRHS.getNode()) {
967 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
968 CCCode = ISD::SETNE;
969 }
970
971 // Update N to have the operands specified.
972 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
973 N->getOperand(2), N->getOperand(3),
974 DAG.getCondCode(CCCode)),
975 0);
976 }
977
978 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
979 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
980 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
981
982 EVT VT = NewLHS.getValueType();
983 NewLHS = GetSoftenedFloat(NewLHS);
984 NewRHS = GetSoftenedFloat(NewRHS);
985 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N),
986 N->getOperand(0), N->getOperand(1));
987
988 // If softenSetCCOperands returned a scalar, use it.
989 if (!NewRHS.getNode()) {
990 assert(NewLHS.getValueType() == N->getValueType(0) &&
991 "Unexpected setcc expansion!");
992 return NewLHS;
993 }
994
995 // Otherwise, update N to have the operands specified.
996 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
997 DAG.getCondCode(CCCode)),
998 0);
999 }
1000
1001 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
1002 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1003 assert(OpNo == 1 && "Can only soften the stored value!");
1004 StoreSDNode *ST = cast<StoreSDNode>(N);
1005 SDValue Val = ST->getValue();
1006 SDLoc dl(N);
1007
1008 if (ST->isTruncatingStore())
1009 // Do an FP_ROUND followed by a non-truncating store.
1010 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
1011 Val, DAG.getIntPtrConstant(0, dl)));
1012 else
1013 Val = GetSoftenedFloat(Val);
1014
1015 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
1016 ST->getMemOperand());
1017 }
1018
1019 SDValue DAGTypeLegalizer::SoftenFloatOp_LROUND(SDNode *N) {
1020 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1021
1022 SDValue Op = GetSoftenedFloat(N->getOperand(0));
1023 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1024 TargetLowering::MakeLibCallOptions CallOptions;
1025 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
1026 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
1027 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1028 RTLIB::LROUND_F32,
1029 RTLIB::LROUND_F64,
1030 RTLIB::LROUND_F80,
1031 RTLIB::LROUND_F128,
1032 RTLIB::LROUND_PPCF128),
1033 NVT, Op, CallOptions, SDLoc(N)).first;
1034 }
1035
1036 SDValue DAGTypeLegalizer::SoftenFloatOp_LLROUND(SDNode *N) {
1037 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1038
1039 SDValue Op = GetSoftenedFloat(N->getOperand(0));
1040 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1041 TargetLowering::MakeLibCallOptions CallOptions;
1042 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
1043 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
1044 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1045 RTLIB::LLROUND_F32,
1046 RTLIB::LLROUND_F64,
1047 RTLIB::LLROUND_F80,
1048 RTLIB::LLROUND_F128,
1049 RTLIB::LLROUND_PPCF128),
1050 NVT, Op, CallOptions, SDLoc(N)).first;
1051 }
1052
1053 SDValue DAGTypeLegalizer::SoftenFloatOp_LRINT(SDNode *N) {
1054 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1055
1056 SDValue Op = GetSoftenedFloat(N->getOperand(0));
1057 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1058 TargetLowering::MakeLibCallOptions CallOptions;
1059 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
1060 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
1061 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1062 RTLIB::LRINT_F32,
1063 RTLIB::LRINT_F64,
1064 RTLIB::LRINT_F80,
1065 RTLIB::LRINT_F128,
1066 RTLIB::LRINT_PPCF128),
1067 NVT, Op, CallOptions, SDLoc(N)).first;
1068 }
1069
1070 SDValue DAGTypeLegalizer::SoftenFloatOp_LLRINT(SDNode *N) {
1071 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1072
1073 SDValue Op = GetSoftenedFloat(N->getOperand(0));
1074 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1075 TargetLowering::MakeLibCallOptions CallOptions;
1076 EVT OpsVT[1] = { N->getOperand(0).getValueType() };
1077 CallOptions.setTypeListBeforeSoften(OpsVT, N->getValueType(0), true);
1078 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1079 RTLIB::LLRINT_F32,
1080 RTLIB::LLRINT_F64,
1081 RTLIB::LLRINT_F80,
1082 RTLIB::LLRINT_F128,
1083 RTLIB::LLRINT_PPCF128),
1084 NVT, Op, CallOptions, SDLoc(N)).first;
1085 }
1086
1087 //===----------------------------------------------------------------------===//
1088 // Float Result Expansion
1089 //===----------------------------------------------------------------------===//
1090
1091 /// ExpandFloatResult - This method is called when the specified result of the
1092 /// specified node is found to need expansion. At this point, the node may also
1093 /// have invalid operands or may have other results that need promotion, we just
1094 /// know that (at least) one result needs expansion.
1095 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
1096 LLVM_DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
1097 SDValue Lo, Hi;
1098 Lo = Hi = SDValue();
1099
1100 // See if the target wants to custom expand this node.
1101 if (CustomLowerNode(N, N->getValueType(ResNo), true))
1102 return;
1103
1104 switch (N->getOpcode()) {
1105 default:
1106 #ifndef NDEBUG
1107 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
1108 N->dump(&DAG); dbgs() << "\n";
1109 #endif
1110 llvm_unreachable("Do not know how to expand the result of this operator!");
1111
1112 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
1113 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
1114 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
1115
1116 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
1117 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
1118 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
1119 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
1120 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
1121 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
1122
1123 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
1124 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
1125 case ISD::FMINNUM: ExpandFloatRes_FMINNUM(N, Lo, Hi); break;
1126 case ISD::FMAXNUM: ExpandFloatRes_FMAXNUM(N, Lo, Hi); break;
1127 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
1128 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
1129 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
1130 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
1131 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
1132 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
1133 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
1134 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
1135 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
1136 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
1137 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
1138 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
1139 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
1140 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
1141 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
1142 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
1143 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
1144 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
1145 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
1146 case ISD::FROUND: ExpandFloatRes_FROUND(N, Lo, Hi); break;
1147 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
1148 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
1149 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
1150 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
1151 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
1152 case ISD::SINT_TO_FP:
1153 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
1154 case ISD::FREM: ExpandFloatRes_FREM(N, Lo, Hi); break;
1155 }
1156
1157 // If Lo/Hi is null, the sub-method took care of registering results etc.
1158 if (Lo.getNode())
1159 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
1160 }
1161
1162 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
1163 SDValue &Hi) {
1164 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1165 assert(NVT.getSizeInBits() == 64 &&
1166 "Do not know how to expand this float constant!");
1167 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
1168 SDLoc dl(N);
1169 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1170 APInt(64, C.getRawData()[1])),
1171 dl, NVT);
1172 Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1173 APInt(64, C.getRawData()[0])),
1174 dl, NVT);
1175 }
1176
1177 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
1178 SDValue &Hi) {
1179 assert(N->getValueType(0) == MVT::ppcf128 &&
1180 "Logic only correct for ppcf128!");
1181 SDLoc dl(N);
1182 SDValue Tmp;
1183 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
1184 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
1185 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
1186 Lo = DAG.getSelectCC(dl, Tmp, Hi, Lo,
1187 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
1188 ISD::SETEQ);
1189 }
1190
1191 void DAGTypeLegalizer::ExpandFloatRes_FMINNUM(SDNode *N, SDValue &Lo,
1192 SDValue &Hi) {
1193 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1194 RTLIB::FMIN_F32, RTLIB::FMIN_F64,
1195 RTLIB::FMIN_F80, RTLIB::FMIN_F128,
1196 RTLIB::FMIN_PPCF128),
1197 N, false);
1198 GetPairElements(Call, Lo, Hi);
1199 }
1200
1201 void DAGTypeLegalizer::ExpandFloatRes_FMAXNUM(SDNode *N, SDValue &Lo,
1202 SDValue &Hi) {
1203 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1204 RTLIB::FMAX_F32, RTLIB::FMAX_F64,
1205 RTLIB::FMAX_F80, RTLIB::FMAX_F128,
1206 RTLIB::FMAX_PPCF128),
1207 N, false);
1208 GetPairElements(Call, Lo, Hi);
1209 }
1210
1211 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
1212 SDValue &Hi) {
1213 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1214 RTLIB::ADD_F32, RTLIB::ADD_F64,
1215 RTLIB::ADD_F80, RTLIB::ADD_F128,
1216 RTLIB::ADD_PPCF128),
1217 N, false);
1218 GetPairElements(Call, Lo, Hi);
1219 }
1220
1221 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
1222 SDValue &Lo, SDValue &Hi) {
1223 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1224 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
1225 RTLIB::CEIL_F80, RTLIB::CEIL_F128,
1226 RTLIB::CEIL_PPCF128),
1227 N, false);
1228 GetPairElements(Call, Lo, Hi);
1229 }
1230
1231 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
1232 SDValue &Lo, SDValue &Hi) {
1233 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1234 RTLIB::COPYSIGN_F32,
1235 RTLIB::COPYSIGN_F64,
1236 RTLIB::COPYSIGN_F80,
1237 RTLIB::COPYSIGN_F128,
1238 RTLIB::COPYSIGN_PPCF128),
1239 N, false);
1240 GetPairElements(Call, Lo, Hi);
1241 }
1242
1243 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
1244 SDValue &Lo, SDValue &Hi) {
1245 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1246 RTLIB::COS_F32, RTLIB::COS_F64,
1247 RTLIB::COS_F80, RTLIB::COS_F128,
1248 RTLIB::COS_PPCF128),
1249 N, false);
1250 GetPairElements(Call, Lo, Hi);
1251 }
1252
1253 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
1254 SDValue &Hi) {
1255 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1256 TargetLowering::MakeLibCallOptions CallOptions;
1257 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1258 RTLIB::DIV_F32,
1259 RTLIB::DIV_F64,
1260 RTLIB::DIV_F80,
1261 RTLIB::DIV_F128,
1262 RTLIB::DIV_PPCF128),
1263 N->getValueType(0), Ops, CallOptions,
1264 SDLoc(N)).first;
1265 GetPairElements(Call, Lo, Hi);
1266 }
1267
1268 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
1269 SDValue &Lo, SDValue &Hi) {
1270 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1271 RTLIB::EXP_F32, RTLIB::EXP_F64,
1272 RTLIB::EXP_F80, RTLIB::EXP_F128,
1273 RTLIB::EXP_PPCF128),
1274 N, false);
1275 GetPairElements(Call, Lo, Hi);
1276 }
1277
1278 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
1279 SDValue &Lo, SDValue &Hi) {
1280 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1281 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
1282 RTLIB::EXP2_F80, RTLIB::EXP2_F128,
1283 RTLIB::EXP2_PPCF128),
1284 N, false);
1285 GetPairElements(Call, Lo, Hi);
1286 }
1287
1288 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
1289 SDValue &Lo, SDValue &Hi) {
1290 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1291 RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
1292 RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
1293 RTLIB::FLOOR_PPCF128),
1294 N, false);
1295 GetPairElements(Call, Lo, Hi);
1296 }
1297
1298 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
1299 SDValue &Lo, SDValue &Hi) {
1300 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1301 RTLIB::LOG_F32, RTLIB::LOG_F64,
1302 RTLIB::LOG_F80, RTLIB::LOG_F128,
1303 RTLIB::LOG_PPCF128),
1304 N, false);
1305 GetPairElements(Call, Lo, Hi);
1306 }
1307
1308 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
1309 SDValue &Lo, SDValue &Hi) {
1310 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1311 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
1312 RTLIB::LOG2_F80, RTLIB::LOG2_F128,
1313 RTLIB::LOG2_PPCF128),
1314 N, false);
1315 GetPairElements(Call, Lo, Hi);
1316 }
1317
1318 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
1319 SDValue &Lo, SDValue &Hi) {
1320 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1321 RTLIB::LOG10_F32, RTLIB::LOG10_F64,
1322 RTLIB::LOG10_F80, RTLIB::LOG10_F128,
1323 RTLIB::LOG10_PPCF128),
1324 N, false);
1325 GetPairElements(Call, Lo, Hi);
1326 }
1327
1328 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
1329 SDValue &Hi) {
1330 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
1331 TargetLowering::MakeLibCallOptions CallOptions;
1332 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1333 RTLIB::FMA_F32,
1334 RTLIB::FMA_F64,
1335 RTLIB::FMA_F80,
1336 RTLIB::FMA_F128,
1337 RTLIB::FMA_PPCF128),
1338 N->getValueType(0), Ops, CallOptions,
1339 SDLoc(N)).first;
1340 GetPairElements(Call, Lo, Hi);
1341 }
1342
1343 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1344 SDValue &Hi) {
1345 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1346 TargetLowering::MakeLibCallOptions CallOptions;
1347 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1348 RTLIB::MUL_F32,
1349 RTLIB::MUL_F64,
1350 RTLIB::MUL_F80,
1351 RTLIB::MUL_F128,
1352 RTLIB::MUL_PPCF128),
1353 N->getValueType(0), Ops, CallOptions,
1354 SDLoc(N)).first;
1355 GetPairElements(Call, Lo, Hi);
1356 }
1357
1358 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1359 SDValue &Lo, SDValue &Hi) {
1360 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1361 RTLIB::NEARBYINT_F32,
1362 RTLIB::NEARBYINT_F64,
1363 RTLIB::NEARBYINT_F80,
1364 RTLIB::NEARBYINT_F128,
1365 RTLIB::NEARBYINT_PPCF128),
1366 N, false);
1367 GetPairElements(Call, Lo, Hi);
1368 }
1369
1370 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1371 SDValue &Hi) {
1372 SDLoc dl(N);
1373 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1374 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1375 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1376 }
1377
1378 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1379 SDValue &Hi) {
1380 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1381 SDLoc dl(N);
1382 Hi = DAG.getNode(ISD::FP_EXTEND, dl, NVT, N->getOperand(0));
1383 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1384 APInt(NVT.getSizeInBits(), 0)), dl, NVT);
1385 }
1386
1387 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1388 SDValue &Lo, SDValue &Hi) {
1389 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1390 RTLIB::POW_F32, RTLIB::POW_F64,
1391 RTLIB::POW_F80, RTLIB::POW_F128,
1392 RTLIB::POW_PPCF128),
1393 N, false);
1394 GetPairElements(Call, Lo, Hi);
1395 }
1396
1397 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1398 SDValue &Lo, SDValue &Hi) {
1399 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1400 RTLIB::POWI_F32, RTLIB::POWI_F64,
1401 RTLIB::POWI_F80, RTLIB::POWI_F128,
1402 RTLIB::POWI_PPCF128),
1403 N, false);
1404 GetPairElements(Call, Lo, Hi);
1405 }
1406
1407 void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1408 SDValue &Lo, SDValue &Hi) {
1409 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1410 RTLIB::REM_F32, RTLIB::REM_F64,
1411 RTLIB::REM_F80, RTLIB::REM_F128,
1412 RTLIB::REM_PPCF128),
1413 N, false);
1414 GetPairElements(Call, Lo, Hi);
1415 }
1416
1417 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1418 SDValue &Lo, SDValue &Hi) {
1419 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1420 RTLIB::RINT_F32, RTLIB::RINT_F64,
1421 RTLIB::RINT_F80, RTLIB::RINT_F128,
1422 RTLIB::RINT_PPCF128),
1423 N, false);
1424 GetPairElements(Call, Lo, Hi);
1425 }
1426
1427 void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1428 SDValue &Lo, SDValue &Hi) {
1429 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1430 RTLIB::ROUND_F32,
1431 RTLIB::ROUND_F64,
1432 RTLIB::ROUND_F80,
1433 RTLIB::ROUND_F128,
1434 RTLIB::ROUND_PPCF128),
1435 N, false);
1436 GetPairElements(Call, Lo, Hi);
1437 }
1438
1439 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1440 SDValue &Lo, SDValue &Hi) {
1441 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1442 RTLIB::SIN_F32, RTLIB::SIN_F64,
1443 RTLIB::SIN_F80, RTLIB::SIN_F128,
1444 RTLIB::SIN_PPCF128),
1445 N, false);
1446 GetPairElements(Call, Lo, Hi);
1447 }
1448
1449 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1450 SDValue &Lo, SDValue &Hi) {
1451 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1452 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1453 RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1454 RTLIB::SQRT_PPCF128),
1455 N, false);
1456 GetPairElements(Call, Lo, Hi);
1457 }
1458
1459 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1460 SDValue &Hi) {
1461 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1462 TargetLowering::MakeLibCallOptions CallOptions;
1463 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1464 RTLIB::SUB_F32,
1465 RTLIB::SUB_F64,
1466 RTLIB::SUB_F80,
1467 RTLIB::SUB_F128,
1468 RTLIB::SUB_PPCF128),
1469 N->getValueType(0), Ops, CallOptions,
1470 SDLoc(N)).first;
1471 GetPairElements(Call, Lo, Hi);
1472 }
1473
1474 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1475 SDValue &Lo, SDValue &Hi) {
1476 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1477 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1478 RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1479 RTLIB::TRUNC_PPCF128),
1480 N, false);
1481 GetPairElements(Call, Lo, Hi);
1482 }
1483
1484 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1485 SDValue &Hi) {
1486 if (ISD::isNormalLoad(N)) {
1487 ExpandRes_NormalLoad(N, Lo, Hi);
1488 return;
1489 }
1490
1491 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1492 LoadSDNode *LD = cast<LoadSDNode>(N);
1493 SDValue Chain = LD->getChain();
1494 SDValue Ptr = LD->getBasePtr();
1495 SDLoc dl(N);
1496
1497 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1498 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1499 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1500
1501 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1502 LD->getMemoryVT(), LD->getMemOperand());
1503
1504 // Remember the chain.
1505 Chain = Hi.getValue(1);
1506
1507 // The low part is zero.
1508 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1509 APInt(NVT.getSizeInBits(), 0)), dl, NVT);
1510
1511 // Modified the chain - switch anything that used the old chain to use the
1512 // new one.
1513 ReplaceValueWith(SDValue(LD, 1), Chain);
1514 }
1515
1516 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1517 SDValue &Hi) {
1518 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1519 EVT VT = N->getValueType(0);
1520 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1521 SDValue Src = N->getOperand(0);
1522 EVT SrcVT = Src.getValueType();
1523 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1524 SDLoc dl(N);
1525
1526 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1527 // When promoting partial word types to i32 we must honor the signedness,
1528 // though.
1529 if (SrcVT.bitsLE(MVT::i32)) {
1530 // The integer can be represented exactly in an f64.
1531 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1532 MVT::i32, Src);
1533 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1534 APInt(NVT.getSizeInBits(), 0)), dl, NVT);
1535 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1536 } else {
1537 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1538 if (SrcVT.bitsLE(MVT::i64)) {
1539 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1540 MVT::i64, Src);
1541 LC = RTLIB::SINTTOFP_I64_PPCF128;
1542 } else if (SrcVT.bitsLE(MVT::i128)) {
1543 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1544 LC = RTLIB::SINTTOFP_I128_PPCF128;
1545 }
1546 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1547
1548 TargetLowering::MakeLibCallOptions CallOptions;
1549 CallOptions.setSExt(true);
1550 Hi = TLI.makeLibCall(DAG, LC, VT, Src, CallOptions, dl).first;
1551 GetPairElements(Hi, Lo, Hi);
1552 }
1553
1554 if (isSigned)
1555 return;
1556
1557 // Unsigned - fix up the SINT_TO_FP value just calculated.
1558 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1559 SrcVT = Src.getValueType();
1560
1561 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1562 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1563 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1564 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1565 ArrayRef<uint64_t> Parts;
1566
1567 switch (SrcVT.getSimpleVT().SimpleTy) {
1568 default:
1569 llvm_unreachable("Unsupported UINT_TO_FP!");
1570 case MVT::i32:
1571 Parts = TwoE32;
1572 break;
1573 case MVT::i64:
1574 Parts = TwoE64;
1575 break;
1576 case MVT::i128:
1577 Parts = TwoE128;
1578 break;
1579 }
1580
1581 // TODO: Are there fast-math-flags to propagate to this FADD?
1582 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1583 DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble(),
1584 APInt(128, Parts)),
1585 dl, MVT::ppcf128));
1586 Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, dl, SrcVT),
1587 Lo, Hi, ISD::SETLT);
1588 GetPairElements(Lo, Lo, Hi);
1589 }
1590
1591
1592 //===----------------------------------------------------------------------===//
1593 // Float Operand Expansion
1594 //===----------------------------------------------------------------------===//
1595
1596 /// ExpandFloatOperand - This method is called when the specified operand of the
1597 /// specified node is found to need expansion. At this point, all of the result
1598 /// types of the node are known to be legal, but other operands of the node may
1599 /// need promotion or expansion as well as the specified one.
1600 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1601 LLVM_DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1602 SDValue Res = SDValue();
1603
1604 // See if the target wants to custom expand this node.
1605 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1606 return false;
1607
1608 switch (N->getOpcode()) {
1609 default:
1610 #ifndef NDEBUG
1611 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1612 N->dump(&DAG); dbgs() << "\n";
1613 #endif
1614 llvm_unreachable("Do not know how to expand this operator's operand!");
1615
1616 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1617 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1618 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1619
1620 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1621 case ISD::FCOPYSIGN: Res = ExpandFloatOp_FCOPYSIGN(N); break;
1622 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1623 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1624 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1625 case ISD::LROUND: Res = ExpandFloatOp_LROUND(N); break;
1626 case ISD::LLROUND: Res = ExpandFloatOp_LLROUND(N); break;
1627 case ISD::LRINT: Res = ExpandFloatOp_LRINT(N); break;
1628 case ISD::LLRINT: Res = ExpandFloatOp_LLRINT(N); break;
1629 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1630 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1631 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1632 OpNo); break;
1633 }
1634
1635 // If the result is null, the sub-method took care of registering results etc.
1636 if (!Res.getNode()) return false;
1637
1638 // If the result is N, the sub-method updated N in place. Tell the legalizer
1639 // core about this.
1640 if (Res.getNode() == N)
1641 return true;
1642
1643 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1644 "Invalid operand expansion");
1645
1646 ReplaceValueWith(SDValue(N, 0), Res);
1647 return false;
1648 }
1649
1650 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1651 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1652 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1653 SDValue &NewRHS,
1654 ISD::CondCode &CCCode,
1655 const SDLoc &dl) {
1656 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1657 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1658 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1659
1660 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1661
1662 // FIXME: This generated code sucks. We want to generate
1663 // FCMPU crN, hi1, hi2
1664 // BNE crN, L:
1665 // FCMPU crN, lo1, lo2
1666 // The following can be improved, but not that much.
1667 SDValue Tmp1, Tmp2, Tmp3;
1668 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1669 LHSHi, RHSHi, ISD::SETOEQ);
1670 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1671 LHSLo, RHSLo, CCCode);
1672 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1673 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1674 LHSHi, RHSHi, ISD::SETUNE);
1675 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1676 LHSHi, RHSHi, CCCode);
1677 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1678 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1679 NewRHS = SDValue(); // LHS is the result, not a compare.
1680 }
1681
1682 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1683 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1684 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1685 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1686
1687 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1688 // against zero to select between true and false values.
1689 if (!NewRHS.getNode()) {
1690 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
1691 CCCode = ISD::SETNE;
1692 }
1693
1694 // Update N to have the operands specified.
1695 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1696 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1697 N->getOperand(4)), 0);
1698 }
1699
1700 SDValue DAGTypeLegalizer::ExpandFloatOp_FCOPYSIGN(SDNode *N) {
1701 assert(N->getOperand(1).getValueType() == MVT::ppcf128 &&
1702 "Logic only correct for ppcf128!");
1703 SDValue Lo, Hi;
1704 GetExpandedFloat(N->getOperand(1), Lo, Hi);
1705 // The ppcf128 value is providing only the sign; take it from the
1706 // higher-order double (which must have the larger magnitude).
1707 return DAG.getNode(ISD::FCOPYSIGN, SDLoc(N),
1708 N->getValueType(0), N->getOperand(0), Hi);
1709 }
1710
1711 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1712 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1713 "Logic only correct for ppcf128!");
1714 SDValue Lo, Hi;
1715 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1716 // Round it the rest of the way (e.g. to f32) if needed.
1717 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1718 N->getValueType(0), Hi, N->getOperand(1));
1719 }
1720
1721 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1722 EVT RVT = N->getValueType(0);
1723 SDLoc dl(N);
1724
1725 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1726 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1727 TargetLowering::MakeLibCallOptions CallOptions;
1728 return TLI.makeLibCall(DAG, LC, RVT, N->getOperand(0), CallOptions, dl).first;
1729 }
1730
1731 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1732 EVT RVT = N->getValueType(0);
1733 SDLoc dl(N);
1734
1735 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1736 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1737 TargetLowering::MakeLibCallOptions CallOptions;
1738 return TLI.makeLibCall(DAG, LC, N->getValueType(0), N->getOperand(0),
1739 CallOptions, dl).first;
1740 }
1741
1742 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1743 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1744 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1745 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1746
1747 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1748 // against zero to select between true and false values.
1749 if (!NewRHS.getNode()) {
1750 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
1751 CCCode = ISD::SETNE;
1752 }
1753
1754 // Update N to have the operands specified.
1755 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1756 N->getOperand(2), N->getOperand(3),
1757 DAG.getCondCode(CCCode)), 0);
1758 }
1759
1760 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1761 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1762 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1763 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1764
1765 // If ExpandSetCCOperands returned a scalar, use it.
1766 if (!NewRHS.getNode()) {
1767 assert(NewLHS.getValueType() == N->getValueType(0) &&
1768 "Unexpected setcc expansion!");
1769 return NewLHS;
1770 }
1771
1772 // Otherwise, update N to have the operands specified.
1773 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1774 DAG.getCondCode(CCCode)), 0);
1775 }
1776
1777 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1778 if (ISD::isNormalStore(N))
1779 return ExpandOp_NormalStore(N, OpNo);
1780
1781 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1782 assert(OpNo == 1 && "Can only expand the stored value so far");
1783 StoreSDNode *ST = cast<StoreSDNode>(N);
1784
1785 SDValue Chain = ST->getChain();
1786 SDValue Ptr = ST->getBasePtr();
1787
1788 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1789 ST->getValue().getValueType());
1790 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1791 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1792 (void)NVT;
1793
1794 SDValue Lo, Hi;
1795 GetExpandedOp(ST->getValue(), Lo, Hi);
1796
1797 return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1798 ST->getMemoryVT(), ST->getMemOperand());
1799 }
1800
1801 SDValue DAGTypeLegalizer::ExpandFloatOp_LROUND(SDNode *N) {
1802 EVT RVT = N->getValueType(0);
1803 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1804 TargetLowering::MakeLibCallOptions CallOptions;
1805 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1806 RTLIB::LROUND_F32,
1807 RTLIB::LROUND_F64,
1808 RTLIB::LROUND_F80,
1809 RTLIB::LROUND_F128,
1810 RTLIB::LROUND_PPCF128),
1811 RVT, N->getOperand(0), CallOptions, SDLoc(N)).first;
1812 }
1813
1814 SDValue DAGTypeLegalizer::ExpandFloatOp_LLROUND(SDNode *N) {
1815 EVT RVT = N->getValueType(0);
1816 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1817 TargetLowering::MakeLibCallOptions CallOptions;
1818 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1819 RTLIB::LLROUND_F32,
1820 RTLIB::LLROUND_F64,
1821 RTLIB::LLROUND_F80,
1822 RTLIB::LLROUND_F128,
1823 RTLIB::LLROUND_PPCF128),
1824 RVT, N->getOperand(0), CallOptions, SDLoc(N)).first;
1825 }
1826
1827 SDValue DAGTypeLegalizer::ExpandFloatOp_LRINT(SDNode *N) {
1828 EVT RVT = N->getValueType(0);
1829 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1830 TargetLowering::MakeLibCallOptions CallOptions;
1831 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1832 RTLIB::LRINT_F32,
1833 RTLIB::LRINT_F64,
1834 RTLIB::LRINT_F80,
1835 RTLIB::LRINT_F128,
1836 RTLIB::LRINT_PPCF128),
1837 RVT, N->getOperand(0), CallOptions, SDLoc(N)).first;
1838 }
1839
1840 SDValue DAGTypeLegalizer::ExpandFloatOp_LLRINT(SDNode *N) {
1841 EVT RVT = N->getValueType(0);
1842 EVT RetVT = N->getOperand(0).getValueType().getSimpleVT().SimpleTy;
1843 TargetLowering::MakeLibCallOptions CallOptions;
1844 return TLI.makeLibCall(DAG, GetFPLibCall(RetVT,
1845 RTLIB::LLRINT_F32,
1846 RTLIB::LLRINT_F64,
1847 RTLIB::LLRINT_F80,
1848 RTLIB::LLRINT_F128,
1849 RTLIB::LLRINT_PPCF128),
1850 RVT, N->getOperand(0), CallOptions, SDLoc(N)).first;
1851 }
1852
1853 //===----------------------------------------------------------------------===//
1854 // Float Operand Promotion
1855 //===----------------------------------------------------------------------===//
1856 //
1857
1858 static ISD::NodeType GetPromotionOpcode(EVT OpVT, EVT RetVT) {
1859 if (OpVT == MVT::f16) {
1860 return ISD::FP16_TO_FP;
1861 } else if (RetVT == MVT::f16) {
1862 return ISD::FP_TO_FP16;
1863 }
1864
1865 report_fatal_error("Attempt at an invalid promotion-related conversion");
1866 }
1867
1868 bool DAGTypeLegalizer::PromoteFloatOperand(SDNode *N, unsigned OpNo) {
1869 LLVM_DEBUG(dbgs() << "Promote float operand " << OpNo << ": "; N->dump(&DAG);
1870 dbgs() << "\n");
1871 SDValue R = SDValue();
1872
1873 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false)) {
1874 LLVM_DEBUG(dbgs() << "Node has been custom lowered, done\n");
1875 return false;
1876 }
1877
1878 // Nodes that use a promotion-requiring floating point operand, but doesn't
1879 // produce a promotion-requiring floating point result, need to be legalized
1880 // to use the promoted float operand. Nodes that produce at least one
1881 // promotion-requiring floating point result have their operands legalized as
1882 // a part of PromoteFloatResult.
1883 switch (N->getOpcode()) {
1884 default:
1885 #ifndef NDEBUG
1886 dbgs() << "PromoteFloatOperand Op #" << OpNo << ": ";
1887 N->dump(&DAG); dbgs() << "\n";
1888 #endif
1889 llvm_unreachable("Do not know how to promote this operator's operand!");
1890
1891 case ISD::BITCAST: R = PromoteFloatOp_BITCAST(N, OpNo); break;
1892 case ISD::FCOPYSIGN: R = PromoteFloatOp_FCOPYSIGN(N, OpNo); break;
1893 case ISD::FP_TO_SINT:
1894 case ISD::FP_TO_UINT: R = PromoteFloatOp_FP_TO_XINT(N, OpNo); break;
1895 case ISD::FP_EXTEND: R = PromoteFloatOp_FP_EXTEND(N, OpNo); break;
1896 case ISD::SELECT_CC: R = PromoteFloatOp_SELECT_CC(N, OpNo); break;
1897 case ISD::SETCC: R = PromoteFloatOp_SETCC(N, OpNo); break;
1898 case ISD::STORE: R = PromoteFloatOp_STORE(N, OpNo); break;
1899 }
1900
1901 if (R.getNode())
1902 ReplaceValueWith(SDValue(N, 0), R);
1903 return false;
1904 }
1905
1906 SDValue DAGTypeLegalizer::PromoteFloatOp_BITCAST(SDNode *N, unsigned OpNo) {
1907 SDValue Op = N->getOperand(0);
1908 EVT OpVT = Op->getValueType(0);
1909
1910 SDValue Promoted = GetPromotedFloat(N->getOperand(0));
1911 EVT PromotedVT = Promoted->getValueType(0);
1912
1913 // Convert the promoted float value to the desired IVT.
1914 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), OpVT.getSizeInBits());
1915 SDValue Convert = DAG.getNode(GetPromotionOpcode(PromotedVT, OpVT), SDLoc(N),
1916 IVT, Promoted);
1917 // The final result type might not be an scalar so we need a bitcast. The
1918 // bitcast will be further legalized if needed.
1919 return DAG.getBitcast(N->getValueType(0), Convert);
1920 }
1921
1922 // Promote Operand 1 of FCOPYSIGN. Operand 0 ought to be handled by
1923 // PromoteFloatRes_FCOPYSIGN.
1924 SDValue DAGTypeLegalizer::PromoteFloatOp_FCOPYSIGN(SDNode *N, unsigned OpNo) {
1925 assert (OpNo == 1 && "Only Operand 1 must need promotion here");
1926 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
1927
1928 return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0),
1929 N->getOperand(0), Op1);
1930 }
1931
1932 // Convert the promoted float value to the desired integer type
1933 SDValue DAGTypeLegalizer::PromoteFloatOp_FP_TO_XINT(SDNode *N, unsigned OpNo) {
1934 SDValue Op = GetPromotedFloat(N->getOperand(0));
1935 return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0), Op);
1936 }
1937
1938 SDValue DAGTypeLegalizer::PromoteFloatOp_FP_EXTEND(SDNode *N, unsigned OpNo) {
1939 SDValue Op = GetPromotedFloat(N->getOperand(0));
1940 EVT VT = N->getValueType(0);
1941
1942 // Desired VT is same as promoted type. Use promoted float directly.
1943 if (VT == Op->getValueType(0))
1944 return Op;
1945
1946 // Else, extend the promoted float value to the desired VT.
1947 return DAG.getNode(ISD::FP_EXTEND, SDLoc(N), VT, Op);
1948 }
1949
1950 // Promote the float operands used for comparison. The true- and false-
1951 // operands have the same type as the result and are promoted, if needed, by
1952 // PromoteFloatRes_SELECT_CC
1953 SDValue DAGTypeLegalizer::PromoteFloatOp_SELECT_CC(SDNode *N, unsigned OpNo) {
1954 SDValue LHS = GetPromotedFloat(N->getOperand(0));
1955 SDValue RHS = GetPromotedFloat(N->getOperand(1));
1956
1957 return DAG.getNode(ISD::SELECT_CC, SDLoc(N), N->getValueType(0),
1958 LHS, RHS, N->getOperand(2), N->getOperand(3),
1959 N->getOperand(4));
1960 }
1961
1962 // Construct a SETCC that compares the promoted values and sets the conditional
1963 // code.
1964 SDValue DAGTypeLegalizer::PromoteFloatOp_SETCC(SDNode *N, unsigned OpNo) {
1965 EVT VT = N->getValueType(0);
1966 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1967 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
1968 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
1969 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1970
1971 return DAG.getSetCC(SDLoc(N), NVT, Op0, Op1, CCCode);
1972
1973 }
1974
1975 // Lower the promoted Float down to the integer value of same size and construct
1976 // a STORE of the integer value.
1977 SDValue DAGTypeLegalizer::PromoteFloatOp_STORE(SDNode *N, unsigned OpNo) {
1978 StoreSDNode *ST = cast<StoreSDNode>(N);
1979 SDValue Val = ST->getValue();
1980 SDLoc DL(N);
1981
1982 SDValue Promoted = GetPromotedFloat(Val);
1983 EVT VT = ST->getOperand(1).getValueType();
1984 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
1985
1986 SDValue NewVal;
1987 NewVal = DAG.getNode(GetPromotionOpcode(Promoted.getValueType(), VT), DL,
1988 IVT, Promoted);
1989
1990 return DAG.getStore(ST->getChain(), DL, NewVal, ST->getBasePtr(),
1991 ST->getMemOperand());
1992 }
1993
1994 //===----------------------------------------------------------------------===//
1995 // Float Result Promotion
1996 //===----------------------------------------------------------------------===//
1997
1998 void DAGTypeLegalizer::PromoteFloatResult(SDNode *N, unsigned ResNo) {
1999 LLVM_DEBUG(dbgs() << "Promote float result " << ResNo << ": "; N->dump(&DAG);
2000 dbgs() << "\n");
2001 SDValue R = SDValue();
2002
2003 // See if the target wants to custom expand this node.
2004 if (CustomLowerNode(N, N->getValueType(ResNo), true)) {
2005 LLVM_DEBUG(dbgs() << "Node has been custom expanded, done\n");
2006 return;
2007 }
2008
2009 switch (N->getOpcode()) {
2010 // These opcodes cannot appear if promotion of FP16 is done in the backend
2011 // instead of Clang
2012 case ISD::FP16_TO_FP:
2013 case ISD::FP_TO_FP16:
2014 default:
2015 #ifndef NDEBUG
2016 dbgs() << "PromoteFloatResult #" << ResNo << ": ";
2017 N->dump(&DAG); dbgs() << "\n";
2018 #endif
2019 llvm_unreachable("Do not know how to promote this operator's result!");
2020
2021 case ISD::BITCAST: R = PromoteFloatRes_BITCAST(N); break;
2022 case ISD::ConstantFP: R = PromoteFloatRes_ConstantFP(N); break;
2023 case ISD::EXTRACT_VECTOR_ELT:
2024 R = PromoteFloatRes_EXTRACT_VECTOR_ELT(N); break;
2025 case ISD::FCOPYSIGN: R = PromoteFloatRes_FCOPYSIGN(N); break;
2026
2027 // Unary FP Operations
2028 case ISD::FABS:
2029 case ISD::FCEIL:
2030 case ISD::FCOS:
2031 case ISD::FEXP:
2032 case ISD::FEXP2:
2033 case ISD::FFLOOR:
2034 case ISD::FLOG:
2035 case ISD::FLOG2:
2036 case ISD::FLOG10:
2037 case ISD::FNEARBYINT:
2038 case ISD::FNEG:
2039 case ISD::FRINT:
2040 case ISD::FROUND:
2041 case ISD::FSIN:
2042 case ISD::FSQRT:
2043 case ISD::FTRUNC:
2044 case ISD::FCANONICALIZE: R = PromoteFloatRes_UnaryOp(N); break;
2045
2046 // Binary FP Operations
2047 case ISD::FADD:
2048 case ISD::FDIV:
2049 case ISD::FMAXIMUM:
2050 case ISD::FMINIMUM:
2051 case ISD::FMAXNUM:
2052 case ISD::FMINNUM:
2053 case ISD::FMUL:
2054 case ISD::FPOW:
2055 case ISD::FREM:
2056 case ISD::FSUB: R = PromoteFloatRes_BinOp(N); break;
2057
2058 case ISD::FMA: // FMA is same as FMAD
2059 case ISD::FMAD: R = PromoteFloatRes_FMAD(N); break;
2060
2061 case ISD::FPOWI: R = PromoteFloatRes_FPOWI(N); break;
2062
2063 case ISD::FP_ROUND: R = PromoteFloatRes_FP_ROUND(N); break;
2064 case ISD::LOAD: R = PromoteFloatRes_LOAD(N); break;
2065 case ISD::SELECT: R = PromoteFloatRes_SELECT(N); break;
2066 case ISD::SELECT_CC: R = PromoteFloatRes_SELECT_CC(N); break;
2067
2068 case ISD::SINT_TO_FP:
2069 case ISD::UINT_TO_FP: R = PromoteFloatRes_XINT_TO_FP(N); break;
2070 case ISD::UNDEF: R = PromoteFloatRes_UNDEF(N); break;
2071 case ISD::ATOMIC_SWAP: R = BitcastToInt_ATOMIC_SWAP(N); break;
2072 }
2073
2074 if (R.getNode())
2075 SetPromotedFloat(SDValue(N, ResNo), R);
2076 }
2077
2078 // Bitcast from i16 to f16: convert the i16 to a f32 value instead.
2079 // At this point, it is not possible to determine if the bitcast value is
2080 // eventually stored to memory or promoted to f32 or promoted to a floating
2081 // point at a higher precision. Some of these cases are handled by FP_EXTEND,
2082 // STORE promotion handlers.
2083 SDValue DAGTypeLegalizer::PromoteFloatRes_BITCAST(SDNode *N) {
2084 EVT VT = N->getValueType(0);
2085 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2086 // Input type isn't guaranteed to be a scalar int so bitcast if not. The
2087 // bitcast will be legalized further if necessary.
2088 EVT IVT = EVT::getIntegerVT(*DAG.getContext(),
2089 N->getOperand(0).getValueType().getSizeInBits());
2090 SDValue Cast = DAG.getBitcast(IVT, N->getOperand(0));
2091 return DAG.getNode(GetPromotionOpcode(VT, NVT), SDLoc(N), NVT, Cast);
2092 }
2093
2094 SDValue DAGTypeLegalizer::PromoteFloatRes_ConstantFP(SDNode *N) {
2095 ConstantFPSDNode *CFPNode = cast<ConstantFPSDNode>(N);
2096 EVT VT = N->getValueType(0);
2097 SDLoc DL(N);
2098
2099 // Get the (bit-cast) APInt of the APFloat and build an integer constant
2100 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
2101 SDValue C = DAG.getConstant(CFPNode->getValueAPF().bitcastToAPInt(), DL,
2102 IVT);
2103
2104 // Convert the Constant to the desired FP type
2105 // FIXME We might be able to do the conversion during compilation and get rid
2106 // of it from the object code
2107 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2108 return DAG.getNode(GetPromotionOpcode(VT, NVT), DL, NVT, C);
2109 }
2110
2111 // If the Index operand is a constant, try to redirect the extract operation to
2112 // the correct legalized vector. If not, bit-convert the input vector to
2113 // equivalent integer vector. Extract the element as an (bit-cast) integer
2114 // value and convert it to the promoted type.
2115 SDValue DAGTypeLegalizer::PromoteFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
2116 SDLoc DL(N);
2117
2118 // If the index is constant, try to extract the value from the legalized
2119 // vector type.
2120 if (isa<ConstantSDNode>(N->getOperand(1))) {
2121 SDValue Vec = N->getOperand(0);
2122 SDValue Idx = N->getOperand(1);
2123 EVT VecVT = Vec->getValueType(0);
2124 EVT EltVT = VecVT.getVectorElementType();
2125
2126 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
2127
2128 switch (getTypeAction(VecVT)) {
2129 default: break;
2130 case TargetLowering::TypeScalarizeVector: {
2131 SDValue Res = GetScalarizedVector(N->getOperand(0));
2132 ReplaceValueWith(SDValue(N, 0), Res);
2133 return SDValue();
2134 }
2135 case TargetLowering::TypeWidenVector: {
2136 Vec = GetWidenedVector(Vec);
2137 SDValue Res = DAG.getNode(N->getOpcode(), DL, EltVT, Vec, Idx);
2138 ReplaceValueWith(SDValue(N, 0), Res);
2139 return SDValue();
2140 }
2141 case TargetLowering::TypeSplitVector: {
2142 SDValue Lo, Hi;
2143 GetSplitVector(Vec, Lo, Hi);
2144
2145 uint64_t LoElts = Lo.getValueType().getVectorNumElements();
2146 SDValue Res;
2147 if (IdxVal < LoElts)
2148 Res = DAG.getNode(N->getOpcode(), DL, EltVT, Lo, Idx);
2149 else
2150 Res = DAG.getNode(N->getOpcode(), DL, EltVT, Hi,
2151 DAG.getConstant(IdxVal - LoElts, DL,
2152 Idx.getValueType()));
2153 ReplaceValueWith(SDValue(N, 0), Res);
2154 return SDValue();
2155 }
2156
2157 }
2158 }
2159
2160 // Bit-convert the input vector to the equivalent integer vector
2161 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
2162 EVT IVT = NewOp.getValueType().getVectorElementType();
2163
2164 // Extract the element as an (bit-cast) integer value
2165 SDValue NewVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, IVT,
2166 NewOp, N->getOperand(1));
2167
2168 // Convert the element to the desired FP type
2169 EVT VT = N->getValueType(0);
2170 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2171 return DAG.getNode(GetPromotionOpcode(VT, NVT), SDLoc(N), NVT, NewVal);
2172 }
2173
2174 // FCOPYSIGN(X, Y) returns the value of X with the sign of Y. If the result
2175 // needs promotion, so does the argument X. Note that Y, if needed, will be
2176 // handled during operand promotion.
2177 SDValue DAGTypeLegalizer::PromoteFloatRes_FCOPYSIGN(SDNode *N) {
2178 EVT VT = N->getValueType(0);
2179 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2180 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
2181
2182 SDValue Op1 = N->getOperand(1);
2183
2184 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1);
2185 }
2186
2187 // Unary operation where the result and the operand have PromoteFloat type
2188 // action. Construct a new SDNode with the promoted float value of the old
2189 // operand.
2190 SDValue DAGTypeLegalizer::PromoteFloatRes_UnaryOp(SDNode *N) {
2191 EVT VT = N->getValueType(0);
2192 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2193 SDValue Op = GetPromotedFloat(N->getOperand(0));
2194
2195 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op);
2196 }
2197
2198 // Binary operations where the result and both operands have PromoteFloat type
2199 // action. Construct a new SDNode with the promoted float values of the old
2200 // operands.
2201 SDValue DAGTypeLegalizer::PromoteFloatRes_BinOp(SDNode *N) {
2202 EVT VT = N->getValueType(0);
2203 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2204 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
2205 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
2206 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1, N->getFlags());
2207 }
2208
2209 SDValue DAGTypeLegalizer::PromoteFloatRes_FMAD(SDNode *N) {
2210 EVT VT = N->getValueType(0);
2211 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2212 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
2213 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
2214 SDValue Op2 = GetPromotedFloat(N->getOperand(2));
2215
2216 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1, Op2);
2217 }
2218
2219 // Promote the Float (first) operand and retain the Integer (second) operand
2220 SDValue DAGTypeLegalizer::PromoteFloatRes_FPOWI(SDNode *N) {
2221 EVT VT = N->getValueType(0);
2222 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2223 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
2224 SDValue Op1 = N->getOperand(1);
2225
2226 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1);
2227 }
2228
2229 // Explicit operation to reduce precision. Reduce the value to half precision
2230 // and promote it back to the legal type.
2231 SDValue DAGTypeLegalizer::PromoteFloatRes_FP_ROUND(SDNode *N) {
2232 SDLoc DL(N);
2233
2234 SDValue Op = N->getOperand(0);
2235 EVT VT = N->getValueType(0);
2236 EVT OpVT = Op->getValueType(0);
2237 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
2238 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
2239
2240 // Round promoted float to desired precision
2241 SDValue Round = DAG.getNode(GetPromotionOpcode(OpVT, VT), DL, IVT, Op);
2242 // Promote it back to the legal output type
2243 return DAG.getNode(GetPromotionOpcode(VT, NVT), DL, NVT, Round);
2244 }
2245
2246 SDValue DAGTypeLegalizer::PromoteFloatRes_LOAD(SDNode *N) {
2247 LoadSDNode *L = cast<LoadSDNode>(N);
2248 EVT VT = N->getValueType(0);
2249
2250 // Load the value as an integer value with the same number of bits.
2251 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
2252 SDValue newL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(), IVT,
2253 SDLoc(N), L->getChain(), L->getBasePtr(),
2254 L->getOffset(), L->getPointerInfo(), IVT,
2255 L->getAlignment(),
2256 L->getMemOperand()->getFlags(),
2257 L->getAAInfo());
2258 // Legalize the chain result by replacing uses of the old value chain with the
2259 // new one
2260 ReplaceValueWith(SDValue(N, 1), newL.getValue(1));
2261
2262 // Convert the integer value to the desired FP type
2263 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2264 return DAG.getNode(GetPromotionOpcode(VT, NVT), SDLoc(N), NVT, newL);
2265 }
2266
2267 // Construct a new SELECT node with the promoted true- and false- values.
2268 SDValue DAGTypeLegalizer::PromoteFloatRes_SELECT(SDNode *N) {
2269 SDValue TrueVal = GetPromotedFloat(N->getOperand(1));
2270 SDValue FalseVal = GetPromotedFloat(N->getOperand(2));
2271
2272 return DAG.getNode(ISD::SELECT, SDLoc(N), TrueVal->getValueType(0),
2273 N->getOperand(0), TrueVal, FalseVal);
2274 }
2275
2276 // Construct a new SELECT_CC node with the promoted true- and false- values.
2277 // The operands used for comparison are promoted by PromoteFloatOp_SELECT_CC.
2278 SDValue DAGTypeLegalizer::PromoteFloatRes_SELECT_CC(SDNode *N) {
2279 SDValue TrueVal = GetPromotedFloat(N->getOperand(2));
2280 SDValue FalseVal = GetPromotedFloat(N->getOperand(3));
2281
2282 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
2283 TrueVal.getNode()->getValueType(0), N->getOperand(0),
2284 N->getOperand(1), TrueVal, FalseVal, N->getOperand(4));
2285 }
2286
2287 // Construct a SDNode that transforms the SINT or UINT operand to the promoted
2288 // float type.
2289 SDValue DAGTypeLegalizer::PromoteFloatRes_XINT_TO_FP(SDNode *N) {
2290 SDLoc DL(N);
2291 EVT VT = N->getValueType(0);
2292 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2293 SDValue NV = DAG.getNode(N->getOpcode(), DL, NVT, N->getOperand(0));
2294 // Round the value to the desired precision (that of the source type).
2295 return DAG.getNode(
2296 ISD::FP_EXTEND, DL, NVT,
2297 DAG.getNode(ISD::FP_ROUND, DL, VT, NV, DAG.getIntPtrConstant(0, DL)));
2298 }
2299
2300 SDValue DAGTypeLegalizer::PromoteFloatRes_UNDEF(SDNode *N) {
2301 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
2302 N->getValueType(0)));
2303 }
2304
2305 SDValue DAGTypeLegalizer::BitcastToInt_ATOMIC_SWAP(SDNode *N) {
2306 EVT VT = N->getValueType(0);
2307 EVT NFPVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2308
2309 AtomicSDNode *AM = cast<AtomicSDNode>(N);
2310 SDLoc SL(N);
2311
2312 SDValue CastVal = BitConvertToInteger(AM->getVal());
2313 EVT CastVT = CastVal.getValueType();
2314
2315 SDValue NewAtomic
2316 = DAG.getAtomic(ISD::ATOMIC_SWAP, SL, CastVT,
2317 DAG.getVTList(CastVT, MVT::Other),
2318 { AM->getChain(), AM->getBasePtr(), CastVal },
2319 AM->getMemOperand());
2320
2321 SDValue ResultCast = DAG.getNode(GetPromotionOpcode(VT, NFPVT), SL, NFPVT,
2322 NewAtomic);
2323 // Legalize the chain result by replacing uses of the old value chain with the
2324 // new one
2325 ReplaceValueWith(SDValue(N, 1), NewAtomic.getValue(1));
2326
2327 return ResultCast;
2328
2329 }
2330
The low level virtual machine