1 //===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This file implements float type expansion and softening for LegalizeTypes.
11 // Softening is the act of turning a computation in an illegal floating point
12 // type into a computation in an integer type of the same size; also known as
13 // "soft float". For example, turning f32 arithmetic into operations using i32.
14 // The resulting integer value is the same as what you would get by performing
15 // the floating point operation and bitcasting the result to the integer type.
16 // Expansion is the act of changing a computation in an illegal type to be a
17 // computation in two identical registers of a smaller type. For example,
18 // implementing ppcf128 arithmetic in two f64 registers.
19 //
20 //===----------------------------------------------------------------------===//
21
22 #include "LegalizeTypes.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/raw_ostream.h"
25 using namespace llvm;
26
27 #define DEBUG_TYPE "legalize-types"
28
29 /// GetFPLibCall - Return the right libcall for the given floating point type.
GetFPLibCall(EVT VT,RTLIB::Libcall Call_F32,RTLIB::Libcall Call_F64,RTLIB::Libcall Call_F80,RTLIB::Libcall Call_F128,RTLIB::Libcall Call_PPCF128)30 static RTLIB::Libcall GetFPLibCall(EVT VT,
31 RTLIB::Libcall Call_F32,
32 RTLIB::Libcall Call_F64,
33 RTLIB::Libcall Call_F80,
34 RTLIB::Libcall Call_F128,
35 RTLIB::Libcall Call_PPCF128) {
36 return
37 VT == MVT::f32 ? Call_F32 :
38 VT == MVT::f64 ? Call_F64 :
39 VT == MVT::f80 ? Call_F80 :
40 VT == MVT::f128 ? Call_F128 :
41 VT == MVT::ppcf128 ? Call_PPCF128 :
42 RTLIB::UNKNOWN_LIBCALL;
43 }
44
45 //===----------------------------------------------------------------------===//
46 // Result Float to Integer Conversion.
47 //===----------------------------------------------------------------------===//
48
SoftenFloatResult(SDNode * N,unsigned ResNo)49 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
50 DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
51 dbgs() << "\n");
52 SDValue R = SDValue();
53
54 switch (N->getOpcode()) {
55 default:
56 #ifndef NDEBUG
57 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
58 N->dump(&DAG); dbgs() << "\n";
59 #endif
60 llvm_unreachable("Do not know how to soften the result of this operator!");
61
62 case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
63 case ISD::BITCAST: R = SoftenFloatRes_BITCAST(N); break;
64 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
65 case ISD::ConstantFP:
66 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
67 break;
68 case ISD::EXTRACT_VECTOR_ELT:
69 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
70 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
71 case ISD::FMINNUM: R = SoftenFloatRes_FMINNUM(N); break;
72 case ISD::FMAXNUM: R = SoftenFloatRes_FMAXNUM(N); break;
73 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
74 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
75 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
76 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
77 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
78 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
79 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
80 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
81 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
82 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
83 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
84 case ISD::FMA: R = SoftenFloatRes_FMA(N); break;
85 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
86 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
87 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
88 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
89 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
90 case ISD::FP16_TO_FP: R = SoftenFloatRes_FP16_TO_FP(N); break;
91 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
92 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
93 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
94 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
95 case ISD::FROUND: R = SoftenFloatRes_FROUND(N); break;
96 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
97 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
98 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
99 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
100 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
101 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
102 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
103 case ISD::SINT_TO_FP:
104 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
105 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
106 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
107 }
108
109 // If R is null, the sub-method took care of registering the result.
110 if (R.getNode())
111 SetSoftenedFloat(SDValue(N, ResNo), R);
112 }
113
SoftenFloatRes_BITCAST(SDNode * N)114 SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
115 return BitConvertToInteger(N->getOperand(0));
116 }
117
SoftenFloatRes_MERGE_VALUES(SDNode * N,unsigned ResNo)118 SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
119 unsigned ResNo) {
120 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
121 return BitConvertToInteger(Op);
122 }
123
SoftenFloatRes_BUILD_PAIR(SDNode * N)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
SoftenFloatRes_ConstantFP(ConstantFPSDNode * N)133 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
134 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(), SDLoc(N),
135 TLI.getTypeToTransformTo(*DAG.getContext(),
136 N->getValueType(0)));
137 }
138
SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode * N)139 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
140 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
141 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
142 NewOp.getValueType().getVectorElementType(),
143 NewOp, N->getOperand(1));
144 }
145
SoftenFloatRes_FABS(SDNode * N)146 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
147 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
148 unsigned Size = NVT.getSizeInBits();
149
150 // Mask = ~(1 << (Size-1))
151 APInt API = APInt::getAllOnesValue(Size);
152 API.clearBit(Size - 1);
153 SDValue Mask = DAG.getConstant(API, SDLoc(N), NVT);
154 SDValue Op = GetSoftenedFloat(N->getOperand(0));
155 return DAG.getNode(ISD::AND, SDLoc(N), NVT, Op, Mask);
156 }
157
SoftenFloatRes_FMINNUM(SDNode * N)158 SDValue DAGTypeLegalizer::SoftenFloatRes_FMINNUM(SDNode *N) {
159 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
160 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
161 GetSoftenedFloat(N->getOperand(1)) };
162 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
163 RTLIB::FMIN_F32,
164 RTLIB::FMIN_F64,
165 RTLIB::FMIN_F80,
166 RTLIB::FMIN_F128,
167 RTLIB::FMIN_PPCF128),
168 NVT, Ops, 2, false, SDLoc(N)).first;
169 }
170
SoftenFloatRes_FMAXNUM(SDNode * N)171 SDValue DAGTypeLegalizer::SoftenFloatRes_FMAXNUM(SDNode *N) {
172 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
173 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
174 GetSoftenedFloat(N->getOperand(1)) };
175 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
176 RTLIB::FMAX_F32,
177 RTLIB::FMAX_F64,
178 RTLIB::FMAX_F80,
179 RTLIB::FMAX_F128,
180 RTLIB::FMAX_PPCF128),
181 NVT, Ops, 2, false, SDLoc(N)).first;
182 }
183
SoftenFloatRes_FADD(SDNode * N)184 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
185 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
186 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
187 GetSoftenedFloat(N->getOperand(1)) };
188 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
189 RTLIB::ADD_F32,
190 RTLIB::ADD_F64,
191 RTLIB::ADD_F80,
192 RTLIB::ADD_F128,
193 RTLIB::ADD_PPCF128),
194 NVT, Ops, 2, false, SDLoc(N)).first;
195 }
196
SoftenFloatRes_FCEIL(SDNode * N)197 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
198 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
199 SDValue Op = GetSoftenedFloat(N->getOperand(0));
200 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
201 RTLIB::CEIL_F32,
202 RTLIB::CEIL_F64,
203 RTLIB::CEIL_F80,
204 RTLIB::CEIL_F128,
205 RTLIB::CEIL_PPCF128),
206 NVT, &Op, 1, false, SDLoc(N)).first;
207 }
208
SoftenFloatRes_FCOPYSIGN(SDNode * N)209 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
210 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
211 SDValue RHS = BitConvertToInteger(N->getOperand(1));
212 SDLoc dl(N);
213
214 EVT LVT = LHS.getValueType();
215 EVT RVT = RHS.getValueType();
216
217 unsigned LSize = LVT.getSizeInBits();
218 unsigned RSize = RVT.getSizeInBits();
219
220 // First get the sign bit of second operand.
221 SDValue SignBit = DAG.getNode(
222 ISD::SHL, dl, RVT, DAG.getConstant(1, dl, RVT),
223 DAG.getConstant(RSize - 1, dl,
224 TLI.getShiftAmountTy(RVT, DAG.getDataLayout())));
225 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
226
227 // Shift right or sign-extend it if the two operands have different types.
228 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
229 if (SizeDiff > 0) {
230 SignBit =
231 DAG.getNode(ISD::SRL, dl, RVT, SignBit,
232 DAG.getConstant(SizeDiff, dl,
233 TLI.getShiftAmountTy(SignBit.getValueType(),
234 DAG.getDataLayout())));
235 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
236 } else if (SizeDiff < 0) {
237 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
238 SignBit =
239 DAG.getNode(ISD::SHL, dl, LVT, SignBit,
240 DAG.getConstant(-SizeDiff, dl,
241 TLI.getShiftAmountTy(SignBit.getValueType(),
242 DAG.getDataLayout())));
243 }
244
245 // Clear the sign bit of the first operand.
246 SDValue Mask = DAG.getNode(
247 ISD::SHL, dl, LVT, DAG.getConstant(1, dl, LVT),
248 DAG.getConstant(LSize - 1, dl,
249 TLI.getShiftAmountTy(LVT, DAG.getDataLayout())));
250 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, dl, LVT));
251 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
252
253 // Or the value with the sign bit.
254 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
255 }
256
SoftenFloatRes_FCOS(SDNode * N)257 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
258 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
259 SDValue Op = GetSoftenedFloat(N->getOperand(0));
260 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
261 RTLIB::COS_F32,
262 RTLIB::COS_F64,
263 RTLIB::COS_F80,
264 RTLIB::COS_F128,
265 RTLIB::COS_PPCF128),
266 NVT, &Op, 1, false, SDLoc(N)).first;
267 }
268
SoftenFloatRes_FDIV(SDNode * N)269 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
270 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
271 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
272 GetSoftenedFloat(N->getOperand(1)) };
273 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
274 RTLIB::DIV_F32,
275 RTLIB::DIV_F64,
276 RTLIB::DIV_F80,
277 RTLIB::DIV_F128,
278 RTLIB::DIV_PPCF128),
279 NVT, Ops, 2, false, SDLoc(N)).first;
280 }
281
SoftenFloatRes_FEXP(SDNode * N)282 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
283 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
284 SDValue Op = GetSoftenedFloat(N->getOperand(0));
285 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
286 RTLIB::EXP_F32,
287 RTLIB::EXP_F64,
288 RTLIB::EXP_F80,
289 RTLIB::EXP_F128,
290 RTLIB::EXP_PPCF128),
291 NVT, &Op, 1, false, SDLoc(N)).first;
292 }
293
SoftenFloatRes_FEXP2(SDNode * N)294 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
295 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
296 SDValue Op = GetSoftenedFloat(N->getOperand(0));
297 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
298 RTLIB::EXP2_F32,
299 RTLIB::EXP2_F64,
300 RTLIB::EXP2_F80,
301 RTLIB::EXP2_F128,
302 RTLIB::EXP2_PPCF128),
303 NVT, &Op, 1, false, SDLoc(N)).first;
304 }
305
SoftenFloatRes_FFLOOR(SDNode * N)306 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
307 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
308 SDValue Op = GetSoftenedFloat(N->getOperand(0));
309 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
310 RTLIB::FLOOR_F32,
311 RTLIB::FLOOR_F64,
312 RTLIB::FLOOR_F80,
313 RTLIB::FLOOR_F128,
314 RTLIB::FLOOR_PPCF128),
315 NVT, &Op, 1, false, SDLoc(N)).first;
316 }
317
SoftenFloatRes_FLOG(SDNode * N)318 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
319 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
320 SDValue Op = GetSoftenedFloat(N->getOperand(0));
321 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
322 RTLIB::LOG_F32,
323 RTLIB::LOG_F64,
324 RTLIB::LOG_F80,
325 RTLIB::LOG_F128,
326 RTLIB::LOG_PPCF128),
327 NVT, &Op, 1, false, SDLoc(N)).first;
328 }
329
SoftenFloatRes_FLOG2(SDNode * N)330 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
331 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
332 SDValue Op = GetSoftenedFloat(N->getOperand(0));
333 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
334 RTLIB::LOG2_F32,
335 RTLIB::LOG2_F64,
336 RTLIB::LOG2_F80,
337 RTLIB::LOG2_F128,
338 RTLIB::LOG2_PPCF128),
339 NVT, &Op, 1, false, SDLoc(N)).first;
340 }
341
SoftenFloatRes_FLOG10(SDNode * N)342 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
343 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
344 SDValue Op = GetSoftenedFloat(N->getOperand(0));
345 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
346 RTLIB::LOG10_F32,
347 RTLIB::LOG10_F64,
348 RTLIB::LOG10_F80,
349 RTLIB::LOG10_F128,
350 RTLIB::LOG10_PPCF128),
351 NVT, &Op, 1, false, SDLoc(N)).first;
352 }
353
SoftenFloatRes_FMA(SDNode * N)354 SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
355 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
356 SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
357 GetSoftenedFloat(N->getOperand(1)),
358 GetSoftenedFloat(N->getOperand(2)) };
359 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
360 RTLIB::FMA_F32,
361 RTLIB::FMA_F64,
362 RTLIB::FMA_F80,
363 RTLIB::FMA_F128,
364 RTLIB::FMA_PPCF128),
365 NVT, Ops, 3, false, SDLoc(N)).first;
366 }
367
SoftenFloatRes_FMUL(SDNode * N)368 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
369 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
370 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
371 GetSoftenedFloat(N->getOperand(1)) };
372 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
373 RTLIB::MUL_F32,
374 RTLIB::MUL_F64,
375 RTLIB::MUL_F80,
376 RTLIB::MUL_F128,
377 RTLIB::MUL_PPCF128),
378 NVT, Ops, 2, false, SDLoc(N)).first;
379 }
380
SoftenFloatRes_FNEARBYINT(SDNode * N)381 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
382 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
383 SDValue Op = GetSoftenedFloat(N->getOperand(0));
384 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
385 RTLIB::NEARBYINT_F32,
386 RTLIB::NEARBYINT_F64,
387 RTLIB::NEARBYINT_F80,
388 RTLIB::NEARBYINT_F128,
389 RTLIB::NEARBYINT_PPCF128),
390 NVT, &Op, 1, false, SDLoc(N)).first;
391 }
392
SoftenFloatRes_FNEG(SDNode * N)393 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
394 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
395 SDLoc dl(N);
396 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
397 SDValue Ops[2] = { DAG.getConstantFP(-0.0, dl, N->getValueType(0)),
398 GetSoftenedFloat(N->getOperand(0)) };
399 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
400 RTLIB::SUB_F32,
401 RTLIB::SUB_F64,
402 RTLIB::SUB_F80,
403 RTLIB::SUB_F128,
404 RTLIB::SUB_PPCF128),
405 NVT, Ops, 2, false, dl).first;
406 }
407
SoftenFloatRes_FP_EXTEND(SDNode * N)408 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
409 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
410 SDValue Op = N->getOperand(0);
411
412 // There's only a libcall for f16 -> f32, so proceed in two stages. Also, it's
413 // entirely possible for both f16 and f32 to be legal, so use the fully
414 // hard-float FP_EXTEND rather than FP16_TO_FP.
415 if (Op.getValueType() == MVT::f16 && N->getValueType(0) != MVT::f32) {
416 Op = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), MVT::f32, Op);
417 if (getTypeAction(MVT::f32) == TargetLowering::TypeSoftenFloat)
418 SoftenFloatResult(Op.getNode(), 0);
419 }
420
421 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
422 if (getTypeAction(Op.getValueType()) == TargetLowering::TypeSoftenFloat)
423 Op = GetSoftenedFloat(Op);
424 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
425 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
426 }
427
428 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
429 // nodes?
SoftenFloatRes_FP16_TO_FP(SDNode * N)430 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP(SDNode *N) {
431 EVT MidVT = TLI.getTypeToTransformTo(*DAG.getContext(), MVT::f32);
432 SDValue Op = N->getOperand(0);
433 SDValue Res32 = TLI.makeLibCall(DAG, RTLIB::FPEXT_F16_F32, MidVT, &Op, 1,
434 false, SDLoc(N)).first;
435 if (N->getValueType(0) == MVT::f32)
436 return Res32;
437
438 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
439 RTLIB::Libcall LC = RTLIB::getFPEXT(MVT::f32, N->getValueType(0));
440 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
441 return TLI.makeLibCall(DAG, LC, NVT, &Res32, 1, false, SDLoc(N)).first;
442 }
443
SoftenFloatRes_FP_ROUND(SDNode * N)444 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
445 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
446 SDValue Op = N->getOperand(0);
447 if (N->getValueType(0) == MVT::f16) {
448 // Semi-soften first, to FP_TO_FP16, so that targets which support f16 as a
449 // storage-only type get a chance to select things.
450 return DAG.getNode(ISD::FP_TO_FP16, SDLoc(N), NVT, Op);
451 }
452
453 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
454 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
455 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
456 }
457
SoftenFloatRes_FPOW(SDNode * N)458 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
459 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
460 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
461 GetSoftenedFloat(N->getOperand(1)) };
462 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
463 RTLIB::POW_F32,
464 RTLIB::POW_F64,
465 RTLIB::POW_F80,
466 RTLIB::POW_F128,
467 RTLIB::POW_PPCF128),
468 NVT, Ops, 2, false, SDLoc(N)).first;
469 }
470
SoftenFloatRes_FPOWI(SDNode * N)471 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
472 assert(N->getOperand(1).getValueType() == MVT::i32 &&
473 "Unsupported power type!");
474 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
475 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
476 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
477 RTLIB::POWI_F32,
478 RTLIB::POWI_F64,
479 RTLIB::POWI_F80,
480 RTLIB::POWI_F128,
481 RTLIB::POWI_PPCF128),
482 NVT, Ops, 2, false, SDLoc(N)).first;
483 }
484
SoftenFloatRes_FREM(SDNode * N)485 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
486 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
487 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
488 GetSoftenedFloat(N->getOperand(1)) };
489 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
490 RTLIB::REM_F32,
491 RTLIB::REM_F64,
492 RTLIB::REM_F80,
493 RTLIB::REM_F128,
494 RTLIB::REM_PPCF128),
495 NVT, Ops, 2, false, SDLoc(N)).first;
496 }
497
SoftenFloatRes_FRINT(SDNode * N)498 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
499 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
500 SDValue Op = GetSoftenedFloat(N->getOperand(0));
501 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
502 RTLIB::RINT_F32,
503 RTLIB::RINT_F64,
504 RTLIB::RINT_F80,
505 RTLIB::RINT_F128,
506 RTLIB::RINT_PPCF128),
507 NVT, &Op, 1, false, SDLoc(N)).first;
508 }
509
SoftenFloatRes_FROUND(SDNode * N)510 SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
511 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
512 SDValue Op = GetSoftenedFloat(N->getOperand(0));
513 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
514 RTLIB::ROUND_F32,
515 RTLIB::ROUND_F64,
516 RTLIB::ROUND_F80,
517 RTLIB::ROUND_F128,
518 RTLIB::ROUND_PPCF128),
519 NVT, &Op, 1, false, SDLoc(N)).first;
520 }
521
SoftenFloatRes_FSIN(SDNode * N)522 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
523 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
524 SDValue Op = GetSoftenedFloat(N->getOperand(0));
525 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
526 RTLIB::SIN_F32,
527 RTLIB::SIN_F64,
528 RTLIB::SIN_F80,
529 RTLIB::SIN_F128,
530 RTLIB::SIN_PPCF128),
531 NVT, &Op, 1, false, SDLoc(N)).first;
532 }
533
SoftenFloatRes_FSQRT(SDNode * N)534 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
535 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
536 SDValue Op = GetSoftenedFloat(N->getOperand(0));
537 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
538 RTLIB::SQRT_F32,
539 RTLIB::SQRT_F64,
540 RTLIB::SQRT_F80,
541 RTLIB::SQRT_F128,
542 RTLIB::SQRT_PPCF128),
543 NVT, &Op, 1, false, SDLoc(N)).first;
544 }
545
SoftenFloatRes_FSUB(SDNode * N)546 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
547 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
548 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
549 GetSoftenedFloat(N->getOperand(1)) };
550 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
551 RTLIB::SUB_F32,
552 RTLIB::SUB_F64,
553 RTLIB::SUB_F80,
554 RTLIB::SUB_F128,
555 RTLIB::SUB_PPCF128),
556 NVT, Ops, 2, false, SDLoc(N)).first;
557 }
558
SoftenFloatRes_FTRUNC(SDNode * N)559 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
560 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
561 if (N->getValueType(0) == MVT::f16)
562 return DAG.getNode(ISD::FP_TO_FP16, SDLoc(N), NVT, N->getOperand(0));
563
564 SDValue Op = GetSoftenedFloat(N->getOperand(0));
565 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
566 RTLIB::TRUNC_F32,
567 RTLIB::TRUNC_F64,
568 RTLIB::TRUNC_F80,
569 RTLIB::TRUNC_F128,
570 RTLIB::TRUNC_PPCF128),
571 NVT, &Op, 1, false, SDLoc(N)).first;
572 }
573
SoftenFloatRes_LOAD(SDNode * N)574 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
575 LoadSDNode *L = cast<LoadSDNode>(N);
576 EVT VT = N->getValueType(0);
577 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
578 SDLoc dl(N);
579
580 SDValue NewL;
581 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
582 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
583 NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
584 L->getPointerInfo(), NVT, L->isVolatile(),
585 L->isNonTemporal(), false, L->getAlignment(),
586 L->getAAInfo());
587 // Legalized the chain result - switch anything that used the old chain to
588 // use the new one.
589 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
590 return NewL;
591 }
592
593 // Do a non-extending load followed by FP_EXTEND.
594 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
595 L->getMemoryVT(), dl, L->getChain(),
596 L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
597 L->getMemoryVT(), L->isVolatile(),
598 L->isNonTemporal(), false, L->getAlignment(),
599 L->getAAInfo());
600 // Legalized the chain result - switch anything that used the old chain to
601 // use the new one.
602 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
603 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
604 }
605
SoftenFloatRes_SELECT(SDNode * N)606 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
607 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
608 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
609 return DAG.getSelect(SDLoc(N),
610 LHS.getValueType(), N->getOperand(0), LHS, RHS);
611 }
612
SoftenFloatRes_SELECT_CC(SDNode * N)613 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
614 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
615 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
616 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
617 LHS.getValueType(), N->getOperand(0),
618 N->getOperand(1), LHS, RHS, N->getOperand(4));
619 }
620
SoftenFloatRes_UNDEF(SDNode * N)621 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
622 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
623 N->getValueType(0)));
624 }
625
SoftenFloatRes_VAARG(SDNode * N)626 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
627 SDValue Chain = N->getOperand(0); // Get the chain.
628 SDValue Ptr = N->getOperand(1); // Get the pointer.
629 EVT VT = N->getValueType(0);
630 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
631 SDLoc dl(N);
632
633 SDValue NewVAARG;
634 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
635 N->getConstantOperandVal(3));
636
637 // Legalized the chain result - switch anything that used the old chain to
638 // use the new one.
639 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
640 return NewVAARG;
641 }
642
SoftenFloatRes_XINT_TO_FP(SDNode * N)643 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
644 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
645 EVT SVT = N->getOperand(0).getValueType();
646 EVT RVT = N->getValueType(0);
647 EVT NVT = EVT();
648 SDLoc dl(N);
649
650 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
651 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
652 // match. Look for an appropriate libcall.
653 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
654 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
655 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
656 NVT = (MVT::SimpleValueType)t;
657 // The source needs to big enough to hold the operand.
658 if (NVT.bitsGE(SVT))
659 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
660 }
661 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
662
663 // Sign/zero extend the argument if the libcall takes a larger type.
664 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
665 NVT, N->getOperand(0));
666 return TLI.makeLibCall(DAG, LC,
667 TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
668 &Op, 1, Signed, dl).first;
669 }
670
671
672 //===----------------------------------------------------------------------===//
673 // Operand Float to Integer Conversion..
674 //===----------------------------------------------------------------------===//
675
SoftenFloatOperand(SDNode * N,unsigned OpNo)676 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
677 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
678 dbgs() << "\n");
679 SDValue Res = SDValue();
680
681 switch (N->getOpcode()) {
682 default:
683 #ifndef NDEBUG
684 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
685 N->dump(&DAG); dbgs() << "\n";
686 #endif
687 llvm_unreachable("Do not know how to soften this operator's operand!");
688
689 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
690 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
691 case ISD::FP_EXTEND: Res = SoftenFloatOp_FP_EXTEND(N); break;
692 case ISD::FP_TO_FP16: // Same as FP_ROUND for softening purposes
693 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
694 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
695 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
696 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
697 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
698 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
699 }
700
701 // If the result is null, the sub-method took care of registering results etc.
702 if (!Res.getNode()) return false;
703
704 // If the result is N, the sub-method updated N in place. Tell the legalizer
705 // core about this.
706 if (Res.getNode() == N)
707 return true;
708
709 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
710 "Invalid operand expansion");
711
712 ReplaceValueWith(SDValue(N, 0), Res);
713 return false;
714 }
715
SoftenFloatOp_BITCAST(SDNode * N)716 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
717 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
718 GetSoftenedFloat(N->getOperand(0)));
719 }
720
SoftenFloatOp_FP_EXTEND(SDNode * N)721 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_EXTEND(SDNode *N) {
722 // If we get here, the result must be legal but the source illegal.
723 EVT SVT = N->getOperand(0).getValueType();
724 EVT RVT = N->getValueType(0);
725 SDValue Op = GetSoftenedFloat(N->getOperand(0));
726
727 if (SVT == MVT::f16)
728 return DAG.getNode(ISD::FP16_TO_FP, SDLoc(N), RVT, Op);
729
730 RTLIB::Libcall LC = RTLIB::getFPEXT(SVT, RVT);
731 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND libcall");
732
733 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
734 }
735
736
SoftenFloatOp_FP_ROUND(SDNode * N)737 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
738 // We actually deal with the partially-softened FP_TO_FP16 node too, which
739 // returns an i16 so doesn't meet the constraints necessary for FP_ROUND.
740 assert(N->getOpcode() == ISD::FP_ROUND || N->getOpcode() == ISD::FP_TO_FP16);
741
742 EVT SVT = N->getOperand(0).getValueType();
743 EVT RVT = N->getValueType(0);
744 EVT FloatRVT = N->getOpcode() == ISD::FP_TO_FP16 ? MVT::f16 : RVT;
745
746 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, FloatRVT);
747 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
748
749 SDValue Op = GetSoftenedFloat(N->getOperand(0));
750 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
751 }
752
SoftenFloatOp_BR_CC(SDNode * N)753 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
754 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
755 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
756
757 EVT VT = NewLHS.getValueType();
758 NewLHS = GetSoftenedFloat(NewLHS);
759 NewRHS = GetSoftenedFloat(NewRHS);
760 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
761
762 // If softenSetCCOperands returned a scalar, we need to compare the result
763 // against zero to select between true and false values.
764 if (!NewRHS.getNode()) {
765 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
766 CCCode = ISD::SETNE;
767 }
768
769 // Update N to have the operands specified.
770 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
771 DAG.getCondCode(CCCode), NewLHS, NewRHS,
772 N->getOperand(4)),
773 0);
774 }
775
SoftenFloatOp_FP_TO_SINT(SDNode * N)776 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
777 EVT RVT = N->getValueType(0);
778 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
779 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
780 SDValue Op = GetSoftenedFloat(N->getOperand(0));
781 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
782 }
783
SoftenFloatOp_FP_TO_UINT(SDNode * N)784 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
785 EVT RVT = N->getValueType(0);
786 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
787 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
788 SDValue Op = GetSoftenedFloat(N->getOperand(0));
789 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
790 }
791
SoftenFloatOp_SELECT_CC(SDNode * N)792 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
793 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
794 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
795
796 EVT VT = NewLHS.getValueType();
797 NewLHS = GetSoftenedFloat(NewLHS);
798 NewRHS = GetSoftenedFloat(NewRHS);
799 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
800
801 // If softenSetCCOperands returned a scalar, we need to compare the result
802 // against zero to select between true and false values.
803 if (!NewRHS.getNode()) {
804 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
805 CCCode = ISD::SETNE;
806 }
807
808 // Update N to have the operands specified.
809 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
810 N->getOperand(2), N->getOperand(3),
811 DAG.getCondCode(CCCode)),
812 0);
813 }
814
SoftenFloatOp_SETCC(SDNode * N)815 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
816 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
817 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
818
819 EVT VT = NewLHS.getValueType();
820 NewLHS = GetSoftenedFloat(NewLHS);
821 NewRHS = GetSoftenedFloat(NewRHS);
822 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
823
824 // If softenSetCCOperands returned a scalar, use it.
825 if (!NewRHS.getNode()) {
826 assert(NewLHS.getValueType() == N->getValueType(0) &&
827 "Unexpected setcc expansion!");
828 return NewLHS;
829 }
830
831 // Otherwise, update N to have the operands specified.
832 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
833 DAG.getCondCode(CCCode)),
834 0);
835 }
836
SoftenFloatOp_STORE(SDNode * N,unsigned OpNo)837 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
838 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
839 assert(OpNo == 1 && "Can only soften the stored value!");
840 StoreSDNode *ST = cast<StoreSDNode>(N);
841 SDValue Val = ST->getValue();
842 SDLoc dl(N);
843
844 if (ST->isTruncatingStore())
845 // Do an FP_ROUND followed by a non-truncating store.
846 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
847 Val, DAG.getIntPtrConstant(0, dl)));
848 else
849 Val = GetSoftenedFloat(Val);
850
851 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
852 ST->getMemOperand());
853 }
854
855
856 //===----------------------------------------------------------------------===//
857 // Float Result Expansion
858 //===----------------------------------------------------------------------===//
859
860 /// ExpandFloatResult - This method is called when the specified result of the
861 /// specified node is found to need expansion. At this point, the node may also
862 /// have invalid operands or may have other results that need promotion, we just
863 /// know that (at least) one result needs expansion.
ExpandFloatResult(SDNode * N,unsigned ResNo)864 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
865 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
866 SDValue Lo, Hi;
867 Lo = Hi = SDValue();
868
869 // See if the target wants to custom expand this node.
870 if (CustomLowerNode(N, N->getValueType(ResNo), true))
871 return;
872
873 switch (N->getOpcode()) {
874 default:
875 #ifndef NDEBUG
876 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
877 N->dump(&DAG); dbgs() << "\n";
878 #endif
879 llvm_unreachable("Do not know how to expand the result of this operator!");
880
881 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
882 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
883 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
884
885 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
886 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
887 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
888 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
889 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
890 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
891
892 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
893 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
894 case ISD::FMINNUM: ExpandFloatRes_FMINNUM(N, Lo, Hi); break;
895 case ISD::FMAXNUM: ExpandFloatRes_FMAXNUM(N, Lo, Hi); break;
896 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
897 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
898 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
899 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
900 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
901 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
902 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
903 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
904 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
905 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
906 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
907 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
908 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
909 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
910 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
911 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
912 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
913 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
914 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
915 case ISD::FROUND: ExpandFloatRes_FROUND(N, Lo, Hi); break;
916 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
917 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
918 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
919 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
920 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
921 case ISD::SINT_TO_FP:
922 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
923 case ISD::FREM: ExpandFloatRes_FREM(N, Lo, Hi); break;
924 }
925
926 // If Lo/Hi is null, the sub-method took care of registering results etc.
927 if (Lo.getNode())
928 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
929 }
930
ExpandFloatRes_ConstantFP(SDNode * N,SDValue & Lo,SDValue & Hi)931 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
932 SDValue &Hi) {
933 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
934 assert(NVT.getSizeInBits() == integerPartWidth &&
935 "Do not know how to expand this float constant!");
936 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
937 SDLoc dl(N);
938 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
939 APInt(integerPartWidth, C.getRawData()[1])),
940 dl, NVT);
941 Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
942 APInt(integerPartWidth, C.getRawData()[0])),
943 dl, NVT);
944 }
945
ExpandFloatRes_FABS(SDNode * N,SDValue & Lo,SDValue & Hi)946 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
947 SDValue &Hi) {
948 assert(N->getValueType(0) == MVT::ppcf128 &&
949 "Logic only correct for ppcf128!");
950 SDLoc dl(N);
951 SDValue Tmp;
952 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
953 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
954 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
955 Lo = DAG.getSelectCC(dl, Tmp, Hi, Lo,
956 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
957 ISD::SETEQ);
958 }
959
ExpandFloatRes_FMINNUM(SDNode * N,SDValue & Lo,SDValue & Hi)960 void DAGTypeLegalizer::ExpandFloatRes_FMINNUM(SDNode *N, SDValue &Lo,
961 SDValue &Hi) {
962 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
963 RTLIB::FMIN_F32, RTLIB::FMIN_F64,
964 RTLIB::FMIN_F80, RTLIB::FMIN_F128,
965 RTLIB::FMIN_PPCF128),
966 N, false);
967 GetPairElements(Call, Lo, Hi);
968 }
969
ExpandFloatRes_FMAXNUM(SDNode * N,SDValue & Lo,SDValue & Hi)970 void DAGTypeLegalizer::ExpandFloatRes_FMAXNUM(SDNode *N, SDValue &Lo,
971 SDValue &Hi) {
972 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
973 RTLIB::FMAX_F32, RTLIB::FMAX_F64,
974 RTLIB::FMAX_F80, RTLIB::FMAX_F128,
975 RTLIB::FMAX_PPCF128),
976 N, false);
977 GetPairElements(Call, Lo, Hi);
978 }
979
ExpandFloatRes_FADD(SDNode * N,SDValue & Lo,SDValue & Hi)980 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
981 SDValue &Hi) {
982 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
983 RTLIB::ADD_F32, RTLIB::ADD_F64,
984 RTLIB::ADD_F80, RTLIB::ADD_F128,
985 RTLIB::ADD_PPCF128),
986 N, false);
987 GetPairElements(Call, Lo, Hi);
988 }
989
ExpandFloatRes_FCEIL(SDNode * N,SDValue & Lo,SDValue & Hi)990 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
991 SDValue &Lo, SDValue &Hi) {
992 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
993 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
994 RTLIB::CEIL_F80, RTLIB::CEIL_F128,
995 RTLIB::CEIL_PPCF128),
996 N, false);
997 GetPairElements(Call, Lo, Hi);
998 }
999
ExpandFloatRes_FCOPYSIGN(SDNode * N,SDValue & Lo,SDValue & Hi)1000 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
1001 SDValue &Lo, SDValue &Hi) {
1002 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1003 RTLIB::COPYSIGN_F32,
1004 RTLIB::COPYSIGN_F64,
1005 RTLIB::COPYSIGN_F80,
1006 RTLIB::COPYSIGN_F128,
1007 RTLIB::COPYSIGN_PPCF128),
1008 N, false);
1009 GetPairElements(Call, Lo, Hi);
1010 }
1011
ExpandFloatRes_FCOS(SDNode * N,SDValue & Lo,SDValue & Hi)1012 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
1013 SDValue &Lo, SDValue &Hi) {
1014 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1015 RTLIB::COS_F32, RTLIB::COS_F64,
1016 RTLIB::COS_F80, RTLIB::COS_F128,
1017 RTLIB::COS_PPCF128),
1018 N, false);
1019 GetPairElements(Call, Lo, Hi);
1020 }
1021
ExpandFloatRes_FDIV(SDNode * N,SDValue & Lo,SDValue & Hi)1022 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
1023 SDValue &Hi) {
1024 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1025 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1026 RTLIB::DIV_F32,
1027 RTLIB::DIV_F64,
1028 RTLIB::DIV_F80,
1029 RTLIB::DIV_F128,
1030 RTLIB::DIV_PPCF128),
1031 N->getValueType(0), Ops, 2, false,
1032 SDLoc(N)).first;
1033 GetPairElements(Call, Lo, Hi);
1034 }
1035
ExpandFloatRes_FEXP(SDNode * N,SDValue & Lo,SDValue & Hi)1036 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
1037 SDValue &Lo, SDValue &Hi) {
1038 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1039 RTLIB::EXP_F32, RTLIB::EXP_F64,
1040 RTLIB::EXP_F80, RTLIB::EXP_F128,
1041 RTLIB::EXP_PPCF128),
1042 N, false);
1043 GetPairElements(Call, Lo, Hi);
1044 }
1045
ExpandFloatRes_FEXP2(SDNode * N,SDValue & Lo,SDValue & Hi)1046 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
1047 SDValue &Lo, SDValue &Hi) {
1048 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1049 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
1050 RTLIB::EXP2_F80, RTLIB::EXP2_F128,
1051 RTLIB::EXP2_PPCF128),
1052 N, false);
1053 GetPairElements(Call, Lo, Hi);
1054 }
1055
ExpandFloatRes_FFLOOR(SDNode * N,SDValue & Lo,SDValue & Hi)1056 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
1057 SDValue &Lo, SDValue &Hi) {
1058 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1059 RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
1060 RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
1061 RTLIB::FLOOR_PPCF128),
1062 N, false);
1063 GetPairElements(Call, Lo, Hi);
1064 }
1065
ExpandFloatRes_FLOG(SDNode * N,SDValue & Lo,SDValue & Hi)1066 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
1067 SDValue &Lo, SDValue &Hi) {
1068 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1069 RTLIB::LOG_F32, RTLIB::LOG_F64,
1070 RTLIB::LOG_F80, RTLIB::LOG_F128,
1071 RTLIB::LOG_PPCF128),
1072 N, false);
1073 GetPairElements(Call, Lo, Hi);
1074 }
1075
ExpandFloatRes_FLOG2(SDNode * N,SDValue & Lo,SDValue & Hi)1076 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
1077 SDValue &Lo, SDValue &Hi) {
1078 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1079 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
1080 RTLIB::LOG2_F80, RTLIB::LOG2_F128,
1081 RTLIB::LOG2_PPCF128),
1082 N, false);
1083 GetPairElements(Call, Lo, Hi);
1084 }
1085
ExpandFloatRes_FLOG10(SDNode * N,SDValue & Lo,SDValue & Hi)1086 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
1087 SDValue &Lo, SDValue &Hi) {
1088 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1089 RTLIB::LOG10_F32, RTLIB::LOG10_F64,
1090 RTLIB::LOG10_F80, RTLIB::LOG10_F128,
1091 RTLIB::LOG10_PPCF128),
1092 N, false);
1093 GetPairElements(Call, Lo, Hi);
1094 }
1095
ExpandFloatRes_FMA(SDNode * N,SDValue & Lo,SDValue & Hi)1096 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
1097 SDValue &Hi) {
1098 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
1099 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1100 RTLIB::FMA_F32,
1101 RTLIB::FMA_F64,
1102 RTLIB::FMA_F80,
1103 RTLIB::FMA_F128,
1104 RTLIB::FMA_PPCF128),
1105 N->getValueType(0), Ops, 3, false,
1106 SDLoc(N)).first;
1107 GetPairElements(Call, Lo, Hi);
1108 }
1109
ExpandFloatRes_FMUL(SDNode * N,SDValue & Lo,SDValue & Hi)1110 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1111 SDValue &Hi) {
1112 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1113 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1114 RTLIB::MUL_F32,
1115 RTLIB::MUL_F64,
1116 RTLIB::MUL_F80,
1117 RTLIB::MUL_F128,
1118 RTLIB::MUL_PPCF128),
1119 N->getValueType(0), Ops, 2, false,
1120 SDLoc(N)).first;
1121 GetPairElements(Call, Lo, Hi);
1122 }
1123
ExpandFloatRes_FNEARBYINT(SDNode * N,SDValue & Lo,SDValue & Hi)1124 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1125 SDValue &Lo, SDValue &Hi) {
1126 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1127 RTLIB::NEARBYINT_F32,
1128 RTLIB::NEARBYINT_F64,
1129 RTLIB::NEARBYINT_F80,
1130 RTLIB::NEARBYINT_F128,
1131 RTLIB::NEARBYINT_PPCF128),
1132 N, false);
1133 GetPairElements(Call, Lo, Hi);
1134 }
1135
ExpandFloatRes_FNEG(SDNode * N,SDValue & Lo,SDValue & Hi)1136 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1137 SDValue &Hi) {
1138 SDLoc dl(N);
1139 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1140 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1141 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1142 }
1143
ExpandFloatRes_FP_EXTEND(SDNode * N,SDValue & Lo,SDValue & Hi)1144 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1145 SDValue &Hi) {
1146 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1147 SDLoc dl(N);
1148 Hi = DAG.getNode(ISD::FP_EXTEND, dl, NVT, N->getOperand(0));
1149 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1150 APInt(NVT.getSizeInBits(), 0)), dl, NVT);
1151 }
1152
ExpandFloatRes_FPOW(SDNode * N,SDValue & Lo,SDValue & Hi)1153 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1154 SDValue &Lo, SDValue &Hi) {
1155 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1156 RTLIB::POW_F32, RTLIB::POW_F64,
1157 RTLIB::POW_F80, RTLIB::POW_F128,
1158 RTLIB::POW_PPCF128),
1159 N, false);
1160 GetPairElements(Call, Lo, Hi);
1161 }
1162
ExpandFloatRes_FPOWI(SDNode * N,SDValue & Lo,SDValue & Hi)1163 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1164 SDValue &Lo, SDValue &Hi) {
1165 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1166 RTLIB::POWI_F32, RTLIB::POWI_F64,
1167 RTLIB::POWI_F80, RTLIB::POWI_F128,
1168 RTLIB::POWI_PPCF128),
1169 N, false);
1170 GetPairElements(Call, Lo, Hi);
1171 }
1172
ExpandFloatRes_FREM(SDNode * N,SDValue & Lo,SDValue & Hi)1173 void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1174 SDValue &Lo, SDValue &Hi) {
1175 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1176 RTLIB::REM_F32, RTLIB::REM_F64,
1177 RTLIB::REM_F80, RTLIB::REM_F128,
1178 RTLIB::REM_PPCF128),
1179 N, false);
1180 GetPairElements(Call, Lo, Hi);
1181 }
1182
ExpandFloatRes_FRINT(SDNode * N,SDValue & Lo,SDValue & Hi)1183 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1184 SDValue &Lo, SDValue &Hi) {
1185 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1186 RTLIB::RINT_F32, RTLIB::RINT_F64,
1187 RTLIB::RINT_F80, RTLIB::RINT_F128,
1188 RTLIB::RINT_PPCF128),
1189 N, false);
1190 GetPairElements(Call, Lo, Hi);
1191 }
1192
ExpandFloatRes_FROUND(SDNode * N,SDValue & Lo,SDValue & Hi)1193 void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1194 SDValue &Lo, SDValue &Hi) {
1195 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1196 RTLIB::ROUND_F32,
1197 RTLIB::ROUND_F64,
1198 RTLIB::ROUND_F80,
1199 RTLIB::ROUND_F128,
1200 RTLIB::ROUND_PPCF128),
1201 N, false);
1202 GetPairElements(Call, Lo, Hi);
1203 }
1204
ExpandFloatRes_FSIN(SDNode * N,SDValue & Lo,SDValue & Hi)1205 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1206 SDValue &Lo, SDValue &Hi) {
1207 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1208 RTLIB::SIN_F32, RTLIB::SIN_F64,
1209 RTLIB::SIN_F80, RTLIB::SIN_F128,
1210 RTLIB::SIN_PPCF128),
1211 N, false);
1212 GetPairElements(Call, Lo, Hi);
1213 }
1214
ExpandFloatRes_FSQRT(SDNode * N,SDValue & Lo,SDValue & Hi)1215 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1216 SDValue &Lo, SDValue &Hi) {
1217 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1218 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1219 RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1220 RTLIB::SQRT_PPCF128),
1221 N, false);
1222 GetPairElements(Call, Lo, Hi);
1223 }
1224
ExpandFloatRes_FSUB(SDNode * N,SDValue & Lo,SDValue & Hi)1225 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1226 SDValue &Hi) {
1227 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1228 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1229 RTLIB::SUB_F32,
1230 RTLIB::SUB_F64,
1231 RTLIB::SUB_F80,
1232 RTLIB::SUB_F128,
1233 RTLIB::SUB_PPCF128),
1234 N->getValueType(0), Ops, 2, false,
1235 SDLoc(N)).first;
1236 GetPairElements(Call, Lo, Hi);
1237 }
1238
ExpandFloatRes_FTRUNC(SDNode * N,SDValue & Lo,SDValue & Hi)1239 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1240 SDValue &Lo, SDValue &Hi) {
1241 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1242 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1243 RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1244 RTLIB::TRUNC_PPCF128),
1245 N, false);
1246 GetPairElements(Call, Lo, Hi);
1247 }
1248
ExpandFloatRes_LOAD(SDNode * N,SDValue & Lo,SDValue & Hi)1249 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1250 SDValue &Hi) {
1251 if (ISD::isNormalLoad(N)) {
1252 ExpandRes_NormalLoad(N, Lo, Hi);
1253 return;
1254 }
1255
1256 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1257 LoadSDNode *LD = cast<LoadSDNode>(N);
1258 SDValue Chain = LD->getChain();
1259 SDValue Ptr = LD->getBasePtr();
1260 SDLoc dl(N);
1261
1262 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1263 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1264 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1265
1266 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1267 LD->getMemoryVT(), LD->getMemOperand());
1268
1269 // Remember the chain.
1270 Chain = Hi.getValue(1);
1271
1272 // The low part is zero.
1273 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1274 APInt(NVT.getSizeInBits(), 0)), dl, NVT);
1275
1276 // Modified the chain - switch anything that used the old chain to use the
1277 // new one.
1278 ReplaceValueWith(SDValue(LD, 1), Chain);
1279 }
1280
ExpandFloatRes_XINT_TO_FP(SDNode * N,SDValue & Lo,SDValue & Hi)1281 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1282 SDValue &Hi) {
1283 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1284 EVT VT = N->getValueType(0);
1285 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1286 SDValue Src = N->getOperand(0);
1287 EVT SrcVT = Src.getValueType();
1288 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1289 SDLoc dl(N);
1290
1291 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1292 // When promoting partial word types to i32 we must honor the signedness,
1293 // though.
1294 if (SrcVT.bitsLE(MVT::i32)) {
1295 // The integer can be represented exactly in an f64.
1296 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1297 MVT::i32, Src);
1298 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1299 APInt(NVT.getSizeInBits(), 0)), dl, NVT);
1300 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1301 } else {
1302 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1303 if (SrcVT.bitsLE(MVT::i64)) {
1304 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1305 MVT::i64, Src);
1306 LC = RTLIB::SINTTOFP_I64_PPCF128;
1307 } else if (SrcVT.bitsLE(MVT::i128)) {
1308 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1309 LC = RTLIB::SINTTOFP_I128_PPCF128;
1310 }
1311 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1312
1313 Hi = TLI.makeLibCall(DAG, LC, VT, &Src, 1, true, dl).first;
1314 GetPairElements(Hi, Lo, Hi);
1315 }
1316
1317 if (isSigned)
1318 return;
1319
1320 // Unsigned - fix up the SINT_TO_FP value just calculated.
1321 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1322 SrcVT = Src.getValueType();
1323
1324 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1325 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1326 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1327 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1328 ArrayRef<uint64_t> Parts;
1329
1330 switch (SrcVT.getSimpleVT().SimpleTy) {
1331 default:
1332 llvm_unreachable("Unsupported UINT_TO_FP!");
1333 case MVT::i32:
1334 Parts = TwoE32;
1335 break;
1336 case MVT::i64:
1337 Parts = TwoE64;
1338 break;
1339 case MVT::i128:
1340 Parts = TwoE128;
1341 break;
1342 }
1343
1344 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1345 DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble,
1346 APInt(128, Parts)),
1347 dl, MVT::ppcf128));
1348 Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, dl, SrcVT),
1349 Lo, Hi, ISD::SETLT);
1350 GetPairElements(Lo, Lo, Hi);
1351 }
1352
1353
1354 //===----------------------------------------------------------------------===//
1355 // Float Operand Expansion
1356 //===----------------------------------------------------------------------===//
1357
1358 /// ExpandFloatOperand - This method is called when the specified operand of the
1359 /// specified node is found to need expansion. At this point, all of the result
1360 /// types of the node are known to be legal, but other operands of the node may
1361 /// need promotion or expansion as well as the specified one.
ExpandFloatOperand(SDNode * N,unsigned OpNo)1362 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1363 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1364 SDValue Res = SDValue();
1365
1366 // See if the target wants to custom expand this node.
1367 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1368 return false;
1369
1370 switch (N->getOpcode()) {
1371 default:
1372 #ifndef NDEBUG
1373 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1374 N->dump(&DAG); dbgs() << "\n";
1375 #endif
1376 llvm_unreachable("Do not know how to expand this operator's operand!");
1377
1378 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1379 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1380 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1381
1382 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1383 case ISD::FCOPYSIGN: Res = ExpandFloatOp_FCOPYSIGN(N); break;
1384 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1385 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1386 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1387 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1388 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1389 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1390 OpNo); break;
1391 }
1392
1393 // If the result is null, the sub-method took care of registering results etc.
1394 if (!Res.getNode()) return false;
1395
1396 // If the result is N, the sub-method updated N in place. Tell the legalizer
1397 // core about this.
1398 if (Res.getNode() == N)
1399 return true;
1400
1401 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1402 "Invalid operand expansion");
1403
1404 ReplaceValueWith(SDValue(N, 0), Res);
1405 return false;
1406 }
1407
1408 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1409 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
FloatExpandSetCCOperands(SDValue & NewLHS,SDValue & NewRHS,ISD::CondCode & CCCode,SDLoc dl)1410 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1411 SDValue &NewRHS,
1412 ISD::CondCode &CCCode,
1413 SDLoc dl) {
1414 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1415 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1416 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1417
1418 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1419
1420 // FIXME: This generated code sucks. We want to generate
1421 // FCMPU crN, hi1, hi2
1422 // BNE crN, L:
1423 // FCMPU crN, lo1, lo2
1424 // The following can be improved, but not that much.
1425 SDValue Tmp1, Tmp2, Tmp3;
1426 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1427 LHSHi, RHSHi, ISD::SETOEQ);
1428 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1429 LHSLo, RHSLo, CCCode);
1430 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1431 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1432 LHSHi, RHSHi, ISD::SETUNE);
1433 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1434 LHSHi, RHSHi, CCCode);
1435 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1436 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1437 NewRHS = SDValue(); // LHS is the result, not a compare.
1438 }
1439
ExpandFloatOp_BR_CC(SDNode * N)1440 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1441 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1442 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1443 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1444
1445 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1446 // against zero to select between true and false values.
1447 if (!NewRHS.getNode()) {
1448 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
1449 CCCode = ISD::SETNE;
1450 }
1451
1452 // Update N to have the operands specified.
1453 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1454 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1455 N->getOperand(4)), 0);
1456 }
1457
ExpandFloatOp_FCOPYSIGN(SDNode * N)1458 SDValue DAGTypeLegalizer::ExpandFloatOp_FCOPYSIGN(SDNode *N) {
1459 assert(N->getOperand(1).getValueType() == MVT::ppcf128 &&
1460 "Logic only correct for ppcf128!");
1461 SDValue Lo, Hi;
1462 GetExpandedFloat(N->getOperand(1), Lo, Hi);
1463 // The ppcf128 value is providing only the sign; take it from the
1464 // higher-order double (which must have the larger magnitude).
1465 return DAG.getNode(ISD::FCOPYSIGN, SDLoc(N),
1466 N->getValueType(0), N->getOperand(0), Hi);
1467 }
1468
ExpandFloatOp_FP_ROUND(SDNode * N)1469 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1470 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1471 "Logic only correct for ppcf128!");
1472 SDValue Lo, Hi;
1473 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1474 // Round it the rest of the way (e.g. to f32) if needed.
1475 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1476 N->getValueType(0), Hi, N->getOperand(1));
1477 }
1478
ExpandFloatOp_FP_TO_SINT(SDNode * N)1479 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1480 EVT RVT = N->getValueType(0);
1481 SDLoc dl(N);
1482
1483 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1484 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1485 if (RVT == MVT::i32) {
1486 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1487 "Logic only correct for ppcf128!");
1488 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1489 N->getOperand(0), DAG.getValueType(MVT::f64));
1490 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1491 DAG.getIntPtrConstant(1, dl));
1492 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1493 }
1494
1495 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1496 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1497 return TLI.makeLibCall(DAG, LC, RVT, &N->getOperand(0), 1, false, dl).first;
1498 }
1499
ExpandFloatOp_FP_TO_UINT(SDNode * N)1500 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1501 EVT RVT = N->getValueType(0);
1502 SDLoc dl(N);
1503
1504 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1505 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1506 if (RVT == MVT::i32) {
1507 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1508 "Logic only correct for ppcf128!");
1509 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1510 APFloat APF = APFloat(APFloat::PPCDoubleDouble, APInt(128, TwoE31));
1511 SDValue Tmp = DAG.getConstantFP(APF, dl, MVT::ppcf128);
1512 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1513 // FIXME: generated code sucks.
1514 return DAG.getSelectCC(dl, N->getOperand(0), Tmp,
1515 DAG.getNode(ISD::ADD, dl, MVT::i32,
1516 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1517 DAG.getNode(ISD::FSUB, dl,
1518 MVT::ppcf128,
1519 N->getOperand(0),
1520 Tmp)),
1521 DAG.getConstant(0x80000000, dl,
1522 MVT::i32)),
1523 DAG.getNode(ISD::FP_TO_SINT, dl,
1524 MVT::i32, N->getOperand(0)),
1525 ISD::SETGE);
1526 }
1527
1528 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1529 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1530 return TLI.makeLibCall(DAG, LC, N->getValueType(0), &N->getOperand(0), 1,
1531 false, dl).first;
1532 }
1533
ExpandFloatOp_SELECT_CC(SDNode * N)1534 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1535 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1536 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1537 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1538
1539 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1540 // against zero to select between true and false values.
1541 if (!NewRHS.getNode()) {
1542 NewRHS = DAG.getConstant(0, SDLoc(N), NewLHS.getValueType());
1543 CCCode = ISD::SETNE;
1544 }
1545
1546 // Update N to have the operands specified.
1547 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1548 N->getOperand(2), N->getOperand(3),
1549 DAG.getCondCode(CCCode)), 0);
1550 }
1551
ExpandFloatOp_SETCC(SDNode * N)1552 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1553 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1554 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1555 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1556
1557 // If ExpandSetCCOperands returned a scalar, use it.
1558 if (!NewRHS.getNode()) {
1559 assert(NewLHS.getValueType() == N->getValueType(0) &&
1560 "Unexpected setcc expansion!");
1561 return NewLHS;
1562 }
1563
1564 // Otherwise, update N to have the operands specified.
1565 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1566 DAG.getCondCode(CCCode)), 0);
1567 }
1568
ExpandFloatOp_STORE(SDNode * N,unsigned OpNo)1569 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1570 if (ISD::isNormalStore(N))
1571 return ExpandOp_NormalStore(N, OpNo);
1572
1573 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1574 assert(OpNo == 1 && "Can only expand the stored value so far");
1575 StoreSDNode *ST = cast<StoreSDNode>(N);
1576
1577 SDValue Chain = ST->getChain();
1578 SDValue Ptr = ST->getBasePtr();
1579
1580 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1581 ST->getValue().getValueType());
1582 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1583 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1584 (void)NVT;
1585
1586 SDValue Lo, Hi;
1587 GetExpandedOp(ST->getValue(), Lo, Hi);
1588
1589 return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1590 ST->getMemoryVT(), ST->getMemOperand());
1591 }
1592
1593 //===----------------------------------------------------------------------===//
1594 // Float Operand Promotion
1595 //===----------------------------------------------------------------------===//
1596 //
1597
GetPromotionOpcode(EVT OpVT,EVT RetVT)1598 static ISD::NodeType GetPromotionOpcode(EVT OpVT, EVT RetVT) {
1599 if (OpVT == MVT::f16) {
1600 return ISD::FP16_TO_FP;
1601 } else if (RetVT == MVT::f16) {
1602 return ISD::FP_TO_FP16;
1603 }
1604
1605 report_fatal_error("Attempt at an invalid promotion-related conversion");
1606 }
1607
PromoteFloatOperand(SDNode * N,unsigned OpNo)1608 bool DAGTypeLegalizer::PromoteFloatOperand(SDNode *N, unsigned OpNo) {
1609 SDValue R = SDValue();
1610
1611 // Nodes that use a promotion-requiring floating point operand, but doesn't
1612 // produce a promotion-requiring floating point result, need to be legalized
1613 // to use the promoted float operand. Nodes that produce at least one
1614 // promotion-requiring floating point result have their operands legalized as
1615 // a part of PromoteFloatResult.
1616 switch (N->getOpcode()) {
1617 default:
1618 llvm_unreachable("Do not know how to promote this operator's operand!");
1619
1620 case ISD::BITCAST: R = PromoteFloatOp_BITCAST(N, OpNo); break;
1621 case ISD::FCOPYSIGN: R = PromoteFloatOp_FCOPYSIGN(N, OpNo); break;
1622 case ISD::FP_TO_SINT:
1623 case ISD::FP_TO_UINT: R = PromoteFloatOp_FP_TO_XINT(N, OpNo); break;
1624 case ISD::FP_EXTEND: R = PromoteFloatOp_FP_EXTEND(N, OpNo); break;
1625 case ISD::SELECT_CC: R = PromoteFloatOp_SELECT_CC(N, OpNo); break;
1626 case ISD::SETCC: R = PromoteFloatOp_SETCC(N, OpNo); break;
1627 case ISD::STORE: R = PromoteFloatOp_STORE(N, OpNo); break;
1628 }
1629
1630 if (R.getNode())
1631 ReplaceValueWith(SDValue(N, 0), R);
1632 return false;
1633 }
1634
PromoteFloatOp_BITCAST(SDNode * N,unsigned OpNo)1635 SDValue DAGTypeLegalizer::PromoteFloatOp_BITCAST(SDNode *N, unsigned OpNo) {
1636 SDValue Op = N->getOperand(0);
1637 EVT OpVT = Op->getValueType(0);
1638
1639 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), OpVT.getSizeInBits());
1640 assert (IVT == N->getValueType(0) && "Bitcast to type of different size");
1641
1642 SDValue Promoted = GetPromotedFloat(N->getOperand(0));
1643 EVT PromotedVT = Promoted->getValueType(0);
1644
1645 // Convert the promoted float value to the desired IVT.
1646 return DAG.getNode(GetPromotionOpcode(PromotedVT, OpVT), SDLoc(N), IVT,
1647 Promoted);
1648 }
1649
1650 // Promote Operand 1 of FCOPYSIGN. Operand 0 ought to be handled by
1651 // PromoteFloatRes_FCOPYSIGN.
PromoteFloatOp_FCOPYSIGN(SDNode * N,unsigned OpNo)1652 SDValue DAGTypeLegalizer::PromoteFloatOp_FCOPYSIGN(SDNode *N, unsigned OpNo) {
1653 assert (OpNo == 1 && "Only Operand 1 must need promotion here");
1654 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
1655
1656 return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0),
1657 N->getOperand(0), Op1);
1658 }
1659
1660 // Convert the promoted float value to the desired integer type
PromoteFloatOp_FP_TO_XINT(SDNode * N,unsigned OpNo)1661 SDValue DAGTypeLegalizer::PromoteFloatOp_FP_TO_XINT(SDNode *N, unsigned OpNo) {
1662 SDValue Op = GetPromotedFloat(N->getOperand(0));
1663 return DAG.getNode(N->getOpcode(), SDLoc(N), N->getValueType(0), Op);
1664 }
1665
PromoteFloatOp_FP_EXTEND(SDNode * N,unsigned OpNo)1666 SDValue DAGTypeLegalizer::PromoteFloatOp_FP_EXTEND(SDNode *N, unsigned OpNo) {
1667 SDValue Op = GetPromotedFloat(N->getOperand(0));
1668 EVT VT = N->getValueType(0);
1669
1670 // Desired VT is same as promoted type. Use promoted float directly.
1671 if (VT == Op->getValueType(0))
1672 return Op;
1673
1674 // Else, extend the promoted float value to the desired VT.
1675 return DAG.getNode(ISD::FP_EXTEND, SDLoc(N), VT, Op);
1676 }
1677
1678 // Promote the float operands used for comparison. The true- and false-
1679 // operands have the same type as the result and are promoted, if needed, by
1680 // PromoteFloatRes_SELECT_CC
PromoteFloatOp_SELECT_CC(SDNode * N,unsigned OpNo)1681 SDValue DAGTypeLegalizer::PromoteFloatOp_SELECT_CC(SDNode *N, unsigned OpNo) {
1682 SDValue LHS = GetPromotedFloat(N->getOperand(0));
1683 SDValue RHS = GetPromotedFloat(N->getOperand(1));
1684
1685 return DAG.getNode(ISD::SELECT_CC, SDLoc(N), N->getValueType(0),
1686 LHS, RHS, N->getOperand(2), N->getOperand(3),
1687 N->getOperand(4));
1688 }
1689
1690 // Construct a SETCC that compares the promoted values and sets the conditional
1691 // code.
PromoteFloatOp_SETCC(SDNode * N,unsigned OpNo)1692 SDValue DAGTypeLegalizer::PromoteFloatOp_SETCC(SDNode *N, unsigned OpNo) {
1693 EVT VT = N->getValueType(0);
1694 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1695 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
1696 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
1697 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1698
1699 return DAG.getSetCC(SDLoc(N), NVT, Op0, Op1, CCCode);
1700
1701 }
1702
1703 // Lower the promoted Float down to the integer value of same size and construct
1704 // a STORE of the integer value.
PromoteFloatOp_STORE(SDNode * N,unsigned OpNo)1705 SDValue DAGTypeLegalizer::PromoteFloatOp_STORE(SDNode *N, unsigned OpNo) {
1706 StoreSDNode *ST = cast<StoreSDNode>(N);
1707 SDValue Val = ST->getValue();
1708 SDLoc DL(N);
1709
1710 SDValue Promoted = GetPromotedFloat(Val);
1711 EVT VT = ST->getOperand(1)->getValueType(0);
1712 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
1713
1714 SDValue NewVal;
1715 NewVal = DAG.getNode(GetPromotionOpcode(Promoted.getValueType(), VT), DL,
1716 IVT, Promoted);
1717
1718 return DAG.getStore(ST->getChain(), DL, NewVal, ST->getBasePtr(),
1719 ST->getMemOperand());
1720 }
1721
1722 //===----------------------------------------------------------------------===//
1723 // Float Result Promotion
1724 //===----------------------------------------------------------------------===//
1725
PromoteFloatResult(SDNode * N,unsigned ResNo)1726 void DAGTypeLegalizer::PromoteFloatResult(SDNode *N, unsigned ResNo) {
1727 SDValue R = SDValue();
1728
1729 switch (N->getOpcode()) {
1730 // These opcodes cannot appear if promotion of FP16 is done in the backend
1731 // instead of Clang
1732 case ISD::FP16_TO_FP:
1733 case ISD::FP_TO_FP16:
1734 default:
1735 llvm_unreachable("Do not know how to promote this operator's result!");
1736
1737 case ISD::BITCAST: R = PromoteFloatRes_BITCAST(N); break;
1738 case ISD::ConstantFP: R = PromoteFloatRes_ConstantFP(N); break;
1739 case ISD::EXTRACT_VECTOR_ELT:
1740 R = PromoteFloatRes_EXTRACT_VECTOR_ELT(N); break;
1741 case ISD::FCOPYSIGN: R = PromoteFloatRes_FCOPYSIGN(N); break;
1742
1743 // Unary FP Operations
1744 case ISD::FABS:
1745 case ISD::FCEIL:
1746 case ISD::FCOS:
1747 case ISD::FEXP:
1748 case ISD::FEXP2:
1749 case ISD::FFLOOR:
1750 case ISD::FLOG:
1751 case ISD::FLOG2:
1752 case ISD::FLOG10:
1753 case ISD::FNEARBYINT:
1754 case ISD::FNEG:
1755 case ISD::FRINT:
1756 case ISD::FROUND:
1757 case ISD::FSIN:
1758 case ISD::FSQRT:
1759 case ISD::FTRUNC: R = PromoteFloatRes_UnaryOp(N); break;
1760
1761 // Binary FP Operations
1762 case ISD::FADD:
1763 case ISD::FDIV:
1764 case ISD::FMAXNUM:
1765 case ISD::FMINNUM:
1766 case ISD::FMUL:
1767 case ISD::FPOW:
1768 case ISD::FREM:
1769 case ISD::FSUB: R = PromoteFloatRes_BinOp(N); break;
1770
1771 case ISD::FMA: // FMA is same as FMAD
1772 case ISD::FMAD: R = PromoteFloatRes_FMAD(N); break;
1773
1774 case ISD::FPOWI: R = PromoteFloatRes_FPOWI(N); break;
1775
1776 case ISD::FP_ROUND: R = PromoteFloatRes_FP_ROUND(N); break;
1777 case ISD::LOAD: R = PromoteFloatRes_LOAD(N); break;
1778 case ISD::SELECT: R = PromoteFloatRes_SELECT(N); break;
1779 case ISD::SELECT_CC: R = PromoteFloatRes_SELECT_CC(N); break;
1780
1781 case ISD::SINT_TO_FP:
1782 case ISD::UINT_TO_FP: R = PromoteFloatRes_XINT_TO_FP(N); break;
1783 case ISD::UNDEF: R = PromoteFloatRes_UNDEF(N); break;
1784
1785 }
1786
1787 if (R.getNode())
1788 SetPromotedFloat(SDValue(N, ResNo), R);
1789 }
1790
1791 // Bitcast from i16 to f16: convert the i16 to a f32 value instead.
1792 // At this point, it is not possible to determine if the bitcast value is
1793 // eventually stored to memory or promoted to f32 or promoted to a floating
1794 // point at a higher precision. Some of these cases are handled by FP_EXTEND,
1795 // STORE promotion handlers.
PromoteFloatRes_BITCAST(SDNode * N)1796 SDValue DAGTypeLegalizer::PromoteFloatRes_BITCAST(SDNode *N) {
1797 EVT VT = N->getValueType(0);
1798 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1799 return DAG.getNode(GetPromotionOpcode(VT, NVT), SDLoc(N), NVT,
1800 N->getOperand(0));
1801 }
1802
PromoteFloatRes_ConstantFP(SDNode * N)1803 SDValue DAGTypeLegalizer::PromoteFloatRes_ConstantFP(SDNode *N) {
1804 ConstantFPSDNode *CFPNode = cast<ConstantFPSDNode>(N);
1805 EVT VT = N->getValueType(0);
1806 SDLoc DL(N);
1807
1808 // Get the (bit-cast) APInt of the APFloat and build an integer constant
1809 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
1810 SDValue C = DAG.getConstant(CFPNode->getValueAPF().bitcastToAPInt(), DL,
1811 IVT);
1812
1813 // Convert the Constant to the desired FP type
1814 // FIXME We might be able to do the conversion during compilation and get rid
1815 // of it from the object code
1816 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1817 return DAG.getNode(GetPromotionOpcode(VT, NVT), DL, NVT, C);
1818 }
1819
1820 // If the Index operand is a constant, try to redirect the extract operation to
1821 // the correct legalized vector. If not, bit-convert the input vector to
1822 // equivalent integer vector. Extract the element as an (bit-cast) integer
1823 // value and convert it to the promoted type.
PromoteFloatRes_EXTRACT_VECTOR_ELT(SDNode * N)1824 SDValue DAGTypeLegalizer::PromoteFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
1825 SDLoc DL(N);
1826
1827 // If the index is constant, try to extract the value from the legalized
1828 // vector type.
1829 if (isa<ConstantSDNode>(N->getOperand(1))) {
1830 SDValue Vec = N->getOperand(0);
1831 SDValue Idx = N->getOperand(1);
1832 EVT VecVT = Vec->getValueType(0);
1833 EVT EltVT = VecVT.getVectorElementType();
1834
1835 uint64_t IdxVal = cast<ConstantSDNode>(Idx)->getZExtValue();
1836
1837 switch (getTypeAction(VecVT)) {
1838 default: break;
1839 case TargetLowering::TypeScalarizeVector: {
1840 SDValue Res = GetScalarizedVector(N->getOperand(0));
1841 ReplaceValueWith(SDValue(N, 0), Res);
1842 return SDValue();
1843 }
1844 case TargetLowering::TypeWidenVector: {
1845 Vec = GetWidenedVector(Vec);
1846 SDValue Res = DAG.getNode(N->getOpcode(), DL, EltVT, Vec, Idx);
1847 ReplaceValueWith(SDValue(N, 0), Res);
1848 return SDValue();
1849 }
1850 case TargetLowering::TypeSplitVector: {
1851 SDValue Lo, Hi;
1852 GetSplitVector(Vec, Lo, Hi);
1853
1854 uint64_t LoElts = Lo.getValueType().getVectorNumElements();
1855 SDValue Res;
1856 if (IdxVal < LoElts)
1857 Res = DAG.getNode(N->getOpcode(), DL, EltVT, Lo, Idx);
1858 else
1859 Res = DAG.getNode(N->getOpcode(), DL, EltVT, Hi,
1860 DAG.getConstant(IdxVal - LoElts, DL,
1861 Idx.getValueType()));
1862 ReplaceValueWith(SDValue(N, 0), Res);
1863 return SDValue();
1864 }
1865
1866 }
1867 }
1868
1869 // Bit-convert the input vector to the equivalent integer vector
1870 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
1871 EVT IVT = NewOp.getValueType().getVectorElementType();
1872
1873 // Extract the element as an (bit-cast) integer value
1874 SDValue NewVal = DAG.getNode(ISD::EXTRACT_VECTOR_ELT, DL, IVT,
1875 NewOp, N->getOperand(1));
1876
1877 // Convert the element to the desired FP type
1878 EVT VT = N->getValueType(0);
1879 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1880 return DAG.getNode(GetPromotionOpcode(VT, NVT), SDLoc(N), NVT, NewVal);
1881 }
1882
1883 // FCOPYSIGN(X, Y) returns the value of X with the sign of Y. If the result
1884 // needs promotion, so does the argument X. Note that Y, if needed, will be
1885 // handled during operand promotion.
PromoteFloatRes_FCOPYSIGN(SDNode * N)1886 SDValue DAGTypeLegalizer::PromoteFloatRes_FCOPYSIGN(SDNode *N) {
1887 EVT VT = N->getValueType(0);
1888 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1889 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
1890
1891 SDValue Op1 = N->getOperand(1);
1892
1893 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1);
1894 }
1895
1896 // Unary operation where the result and the operand have PromoteFloat type
1897 // action. Construct a new SDNode with the promoted float value of the old
1898 // operand.
PromoteFloatRes_UnaryOp(SDNode * N)1899 SDValue DAGTypeLegalizer::PromoteFloatRes_UnaryOp(SDNode *N) {
1900 EVT VT = N->getValueType(0);
1901 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1902 SDValue Op = GetPromotedFloat(N->getOperand(0));
1903
1904 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op);
1905 }
1906
1907 // Binary operations where the result and both operands have PromoteFloat type
1908 // action. Construct a new SDNode with the promoted float values of the old
1909 // operands.
PromoteFloatRes_BinOp(SDNode * N)1910 SDValue DAGTypeLegalizer::PromoteFloatRes_BinOp(SDNode *N) {
1911 EVT VT = N->getValueType(0);
1912 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1913 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
1914 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
1915
1916 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1);
1917 }
1918
PromoteFloatRes_FMAD(SDNode * N)1919 SDValue DAGTypeLegalizer::PromoteFloatRes_FMAD(SDNode *N) {
1920 EVT VT = N->getValueType(0);
1921 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1922 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
1923 SDValue Op1 = GetPromotedFloat(N->getOperand(1));
1924 SDValue Op2 = GetPromotedFloat(N->getOperand(2));
1925
1926 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1, Op2);
1927 }
1928
1929 // Promote the Float (first) operand and retain the Integer (second) operand
PromoteFloatRes_FPOWI(SDNode * N)1930 SDValue DAGTypeLegalizer::PromoteFloatRes_FPOWI(SDNode *N) {
1931 EVT VT = N->getValueType(0);
1932 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1933 SDValue Op0 = GetPromotedFloat(N->getOperand(0));
1934 SDValue Op1 = N->getOperand(1);
1935
1936 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, Op0, Op1);
1937 }
1938
1939 // Explicit operation to reduce precision. Reduce the value to half precision
1940 // and promote it back to the legal type.
PromoteFloatRes_FP_ROUND(SDNode * N)1941 SDValue DAGTypeLegalizer::PromoteFloatRes_FP_ROUND(SDNode *N) {
1942 SDLoc DL(N);
1943
1944 SDValue Op = N->getOperand(0);
1945 EVT VT = N->getValueType(0);
1946 EVT OpVT = Op->getValueType(0);
1947 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1948 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
1949
1950 // Round promoted float to desired precision
1951 SDValue Round = DAG.getNode(GetPromotionOpcode(OpVT, VT), DL, IVT, Op);
1952 // Promote it back to the legal output type
1953 return DAG.getNode(GetPromotionOpcode(VT, NVT), DL, NVT, Round);
1954 }
1955
PromoteFloatRes_LOAD(SDNode * N)1956 SDValue DAGTypeLegalizer::PromoteFloatRes_LOAD(SDNode *N) {
1957 LoadSDNode *L = cast<LoadSDNode>(N);
1958 EVT VT = N->getValueType(0);
1959
1960 // Load the value as an integer value with the same number of bits
1961 EVT IVT = EVT::getIntegerVT(*DAG.getContext(), VT.getSizeInBits());
1962 SDValue newL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
1963 IVT, SDLoc(N), L->getChain(), L->getBasePtr(),
1964 L->getOffset(), L->getPointerInfo(), IVT, L->isVolatile(),
1965 L->isNonTemporal(), false, L->getAlignment(),
1966 L->getAAInfo());
1967 // Legalize the chain result by replacing uses of the old value chain with the
1968 // new one
1969 ReplaceValueWith(SDValue(N, 1), newL.getValue(1));
1970
1971 // Convert the integer value to the desired FP type
1972 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1973 return DAG.getNode(GetPromotionOpcode(VT, NVT), SDLoc(N), NVT, newL);
1974 }
1975
1976 // Construct a new SELECT node with the promoted true- and false- values.
PromoteFloatRes_SELECT(SDNode * N)1977 SDValue DAGTypeLegalizer::PromoteFloatRes_SELECT(SDNode *N) {
1978 SDValue TrueVal = GetPromotedFloat(N->getOperand(1));
1979 SDValue FalseVal = GetPromotedFloat(N->getOperand(2));
1980
1981 return DAG.getNode(ISD::SELECT, SDLoc(N), TrueVal->getValueType(0),
1982 N->getOperand(0), TrueVal, FalseVal);
1983 }
1984
1985 // Construct a new SELECT_CC node with the promoted true- and false- values.
1986 // The operands used for comparison are promoted by PromoteFloatOp_SELECT_CC.
PromoteFloatRes_SELECT_CC(SDNode * N)1987 SDValue DAGTypeLegalizer::PromoteFloatRes_SELECT_CC(SDNode *N) {
1988 SDValue TrueVal = GetPromotedFloat(N->getOperand(2));
1989 SDValue FalseVal = GetPromotedFloat(N->getOperand(3));
1990
1991 return DAG.getNode(ISD::SELECT_CC, SDLoc(N), N->getValueType(0),
1992 N->getOperand(0), N->getOperand(1), TrueVal, FalseVal,
1993 N->getOperand(4));
1994 }
1995
1996 // Construct a SDNode that transforms the SINT or UINT operand to the promoted
1997 // float type.
PromoteFloatRes_XINT_TO_FP(SDNode * N)1998 SDValue DAGTypeLegalizer::PromoteFloatRes_XINT_TO_FP(SDNode *N) {
1999 EVT VT = N->getValueType(0);
2000 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
2001 return DAG.getNode(N->getOpcode(), SDLoc(N), NVT, N->getOperand(0));
2002 }
2003
PromoteFloatRes_UNDEF(SDNode * N)2004 SDValue DAGTypeLegalizer::PromoteFloatRes_UNDEF(SDNode *N) {
2005 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
2006 N->getValueType(0)));
2007 }
2008
2009