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 /// 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_PPCF128)28 static RTLIB::Libcall GetFPLibCall(EVT VT,
29 RTLIB::Libcall Call_F32,
30 RTLIB::Libcall Call_F64,
31 RTLIB::Libcall Call_F80,
32 RTLIB::Libcall Call_PPCF128) {
33 return
34 VT == MVT::f32 ? Call_F32 :
35 VT == MVT::f64 ? Call_F64 :
36 VT == MVT::f80 ? Call_F80 :
37 VT == MVT::ppcf128 ? Call_PPCF128 :
38 RTLIB::UNKNOWN_LIBCALL;
39 }
40
41 //===----------------------------------------------------------------------===//
42 // Result Float to Integer Conversion.
43 //===----------------------------------------------------------------------===//
44
SoftenFloatResult(SDNode * N,unsigned ResNo)45 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
46 DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
47 dbgs() << "\n");
48 SDValue R = SDValue();
49
50 switch (N->getOpcode()) {
51 default:
52 #ifndef NDEBUG
53 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
54 N->dump(&DAG); dbgs() << "\n";
55 #endif
56 llvm_unreachable("Do not know how to soften the result of this operator!");
57
58 case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
59 case ISD::BITCAST: R = SoftenFloatRes_BITCAST(N); break;
60 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
61 case ISD::ConstantFP:
62 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
63 break;
64 case ISD::EXTRACT_VECTOR_ELT:
65 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
66 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
67 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
68 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
69 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
70 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
71 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
72 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
73 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
74 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
75 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
76 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
77 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
78 case ISD::FMA: R = SoftenFloatRes_FMA(N); break;
79 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
80 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
81 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
82 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
83 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
84 case ISD::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(N); break;
85 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
86 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
87 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
88 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
89 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
90 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
91 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
92 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
93 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
94 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
95 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
96 case ISD::SINT_TO_FP:
97 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
98 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
99 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
100 }
101
102 // If R is null, the sub-method took care of registering the result.
103 if (R.getNode())
104 SetSoftenedFloat(SDValue(N, ResNo), R);
105 }
106
SoftenFloatRes_BITCAST(SDNode * N)107 SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
108 return BitConvertToInteger(N->getOperand(0));
109 }
110
SoftenFloatRes_MERGE_VALUES(SDNode * N,unsigned ResNo)111 SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
112 unsigned ResNo) {
113 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
114 return BitConvertToInteger(Op);
115 }
116
SoftenFloatRes_BUILD_PAIR(SDNode * N)117 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
118 // Convert the inputs to integers, and build a new pair out of them.
119 return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(),
120 TLI.getTypeToTransformTo(*DAG.getContext(),
121 N->getValueType(0)),
122 BitConvertToInteger(N->getOperand(0)),
123 BitConvertToInteger(N->getOperand(1)));
124 }
125
SoftenFloatRes_ConstantFP(ConstantFPSDNode * N)126 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
127 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
128 TLI.getTypeToTransformTo(*DAG.getContext(),
129 N->getValueType(0)));
130 }
131
SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode * N)132 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
133 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
134 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
135 NewOp.getValueType().getVectorElementType(),
136 NewOp, N->getOperand(1));
137 }
138
SoftenFloatRes_FABS(SDNode * N)139 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
140 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
141 unsigned Size = NVT.getSizeInBits();
142
143 // Mask = ~(1 << (Size-1))
144 APInt API = APInt::getAllOnesValue(Size);
145 API.clearBit(Size-1);
146 SDValue Mask = DAG.getConstant(API, NVT);
147 SDValue Op = GetSoftenedFloat(N->getOperand(0));
148 return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
149 }
150
SoftenFloatRes_FADD(SDNode * N)151 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
152 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
153 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
154 GetSoftenedFloat(N->getOperand(1)) };
155 return MakeLibCall(GetFPLibCall(N->getValueType(0),
156 RTLIB::ADD_F32,
157 RTLIB::ADD_F64,
158 RTLIB::ADD_F80,
159 RTLIB::ADD_PPCF128),
160 NVT, Ops, 2, false, N->getDebugLoc());
161 }
162
SoftenFloatRes_FCEIL(SDNode * N)163 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
164 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
165 SDValue Op = GetSoftenedFloat(N->getOperand(0));
166 return MakeLibCall(GetFPLibCall(N->getValueType(0),
167 RTLIB::CEIL_F32,
168 RTLIB::CEIL_F64,
169 RTLIB::CEIL_F80,
170 RTLIB::CEIL_PPCF128),
171 NVT, &Op, 1, false, N->getDebugLoc());
172 }
173
SoftenFloatRes_FCOPYSIGN(SDNode * N)174 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
175 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
176 SDValue RHS = BitConvertToInteger(N->getOperand(1));
177 DebugLoc dl = N->getDebugLoc();
178
179 EVT LVT = LHS.getValueType();
180 EVT RVT = RHS.getValueType();
181
182 unsigned LSize = LVT.getSizeInBits();
183 unsigned RSize = RVT.getSizeInBits();
184
185 // First get the sign bit of second operand.
186 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
187 DAG.getConstant(RSize - 1,
188 TLI.getShiftAmountTy(RVT)));
189 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
190
191 // Shift right or sign-extend it if the two operands have different types.
192 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
193 if (SizeDiff > 0) {
194 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
195 DAG.getConstant(SizeDiff,
196 TLI.getShiftAmountTy(SignBit.getValueType())));
197 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
198 } else if (SizeDiff < 0) {
199 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
200 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
201 DAG.getConstant(-SizeDiff,
202 TLI.getShiftAmountTy(SignBit.getValueType())));
203 }
204
205 // Clear the sign bit of the first operand.
206 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
207 DAG.getConstant(LSize - 1,
208 TLI.getShiftAmountTy(LVT)));
209 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
210 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
211
212 // Or the value with the sign bit.
213 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
214 }
215
SoftenFloatRes_FCOS(SDNode * N)216 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
217 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
218 SDValue Op = GetSoftenedFloat(N->getOperand(0));
219 return MakeLibCall(GetFPLibCall(N->getValueType(0),
220 RTLIB::COS_F32,
221 RTLIB::COS_F64,
222 RTLIB::COS_F80,
223 RTLIB::COS_PPCF128),
224 NVT, &Op, 1, false, N->getDebugLoc());
225 }
226
SoftenFloatRes_FDIV(SDNode * N)227 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
228 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
229 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
230 GetSoftenedFloat(N->getOperand(1)) };
231 return MakeLibCall(GetFPLibCall(N->getValueType(0),
232 RTLIB::DIV_F32,
233 RTLIB::DIV_F64,
234 RTLIB::DIV_F80,
235 RTLIB::DIV_PPCF128),
236 NVT, Ops, 2, false, N->getDebugLoc());
237 }
238
SoftenFloatRes_FEXP(SDNode * N)239 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
240 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
241 SDValue Op = GetSoftenedFloat(N->getOperand(0));
242 return MakeLibCall(GetFPLibCall(N->getValueType(0),
243 RTLIB::EXP_F32,
244 RTLIB::EXP_F64,
245 RTLIB::EXP_F80,
246 RTLIB::EXP_PPCF128),
247 NVT, &Op, 1, false, N->getDebugLoc());
248 }
249
SoftenFloatRes_FEXP2(SDNode * N)250 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
251 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
252 SDValue Op = GetSoftenedFloat(N->getOperand(0));
253 return MakeLibCall(GetFPLibCall(N->getValueType(0),
254 RTLIB::EXP2_F32,
255 RTLIB::EXP2_F64,
256 RTLIB::EXP2_F80,
257 RTLIB::EXP2_PPCF128),
258 NVT, &Op, 1, false, N->getDebugLoc());
259 }
260
SoftenFloatRes_FFLOOR(SDNode * N)261 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
262 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
263 SDValue Op = GetSoftenedFloat(N->getOperand(0));
264 return MakeLibCall(GetFPLibCall(N->getValueType(0),
265 RTLIB::FLOOR_F32,
266 RTLIB::FLOOR_F64,
267 RTLIB::FLOOR_F80,
268 RTLIB::FLOOR_PPCF128),
269 NVT, &Op, 1, false, N->getDebugLoc());
270 }
271
SoftenFloatRes_FLOG(SDNode * N)272 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
273 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
274 SDValue Op = GetSoftenedFloat(N->getOperand(0));
275 return MakeLibCall(GetFPLibCall(N->getValueType(0),
276 RTLIB::LOG_F32,
277 RTLIB::LOG_F64,
278 RTLIB::LOG_F80,
279 RTLIB::LOG_PPCF128),
280 NVT, &Op, 1, false, N->getDebugLoc());
281 }
282
SoftenFloatRes_FLOG2(SDNode * N)283 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
284 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
285 SDValue Op = GetSoftenedFloat(N->getOperand(0));
286 return MakeLibCall(GetFPLibCall(N->getValueType(0),
287 RTLIB::LOG2_F32,
288 RTLIB::LOG2_F64,
289 RTLIB::LOG2_F80,
290 RTLIB::LOG2_PPCF128),
291 NVT, &Op, 1, false, N->getDebugLoc());
292 }
293
SoftenFloatRes_FLOG10(SDNode * N)294 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
295 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
296 SDValue Op = GetSoftenedFloat(N->getOperand(0));
297 return MakeLibCall(GetFPLibCall(N->getValueType(0),
298 RTLIB::LOG10_F32,
299 RTLIB::LOG10_F64,
300 RTLIB::LOG10_F80,
301 RTLIB::LOG10_PPCF128),
302 NVT, &Op, 1, false, N->getDebugLoc());
303 }
304
SoftenFloatRes_FMA(SDNode * N)305 SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
306 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
307 SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
308 GetSoftenedFloat(N->getOperand(1)),
309 GetSoftenedFloat(N->getOperand(2)) };
310 return MakeLibCall(GetFPLibCall(N->getValueType(0),
311 RTLIB::FMA_F32,
312 RTLIB::FMA_F64,
313 RTLIB::FMA_F80,
314 RTLIB::FMA_PPCF128),
315 NVT, Ops, 3, false, N->getDebugLoc());
316 }
317
SoftenFloatRes_FMUL(SDNode * N)318 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
319 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
320 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
321 GetSoftenedFloat(N->getOperand(1)) };
322 return MakeLibCall(GetFPLibCall(N->getValueType(0),
323 RTLIB::MUL_F32,
324 RTLIB::MUL_F64,
325 RTLIB::MUL_F80,
326 RTLIB::MUL_PPCF128),
327 NVT, Ops, 2, false, N->getDebugLoc());
328 }
329
SoftenFloatRes_FNEARBYINT(SDNode * N)330 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
331 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
332 SDValue Op = GetSoftenedFloat(N->getOperand(0));
333 return MakeLibCall(GetFPLibCall(N->getValueType(0),
334 RTLIB::NEARBYINT_F32,
335 RTLIB::NEARBYINT_F64,
336 RTLIB::NEARBYINT_F80,
337 RTLIB::NEARBYINT_PPCF128),
338 NVT, &Op, 1, false, N->getDebugLoc());
339 }
340
SoftenFloatRes_FNEG(SDNode * N)341 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
342 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
343 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
344 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
345 GetSoftenedFloat(N->getOperand(0)) };
346 return MakeLibCall(GetFPLibCall(N->getValueType(0),
347 RTLIB::SUB_F32,
348 RTLIB::SUB_F64,
349 RTLIB::SUB_F80,
350 RTLIB::SUB_PPCF128),
351 NVT, Ops, 2, false, N->getDebugLoc());
352 }
353
SoftenFloatRes_FP_EXTEND(SDNode * N)354 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
355 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
356 SDValue Op = N->getOperand(0);
357 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
358 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
359 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
360 }
361
362 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
363 // nodes?
SoftenFloatRes_FP16_TO_FP32(SDNode * N)364 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
365 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
366 SDValue Op = N->getOperand(0);
367 return MakeLibCall(RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false,
368 N->getDebugLoc());
369 }
370
SoftenFloatRes_FP_ROUND(SDNode * N)371 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
372 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
373 SDValue Op = N->getOperand(0);
374 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
375 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
376 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
377 }
378
SoftenFloatRes_FPOW(SDNode * N)379 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
380 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
381 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
382 GetSoftenedFloat(N->getOperand(1)) };
383 return MakeLibCall(GetFPLibCall(N->getValueType(0),
384 RTLIB::POW_F32,
385 RTLIB::POW_F64,
386 RTLIB::POW_F80,
387 RTLIB::POW_PPCF128),
388 NVT, Ops, 2, false, N->getDebugLoc());
389 }
390
SoftenFloatRes_FPOWI(SDNode * N)391 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
392 assert(N->getOperand(1).getValueType() == MVT::i32 &&
393 "Unsupported power type!");
394 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
395 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
396 return MakeLibCall(GetFPLibCall(N->getValueType(0),
397 RTLIB::POWI_F32,
398 RTLIB::POWI_F64,
399 RTLIB::POWI_F80,
400 RTLIB::POWI_PPCF128),
401 NVT, Ops, 2, false, N->getDebugLoc());
402 }
403
SoftenFloatRes_FREM(SDNode * N)404 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
405 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
406 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
407 GetSoftenedFloat(N->getOperand(1)) };
408 return MakeLibCall(GetFPLibCall(N->getValueType(0),
409 RTLIB::REM_F32,
410 RTLIB::REM_F64,
411 RTLIB::REM_F80,
412 RTLIB::REM_PPCF128),
413 NVT, Ops, 2, false, N->getDebugLoc());
414 }
415
SoftenFloatRes_FRINT(SDNode * N)416 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
417 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
418 SDValue Op = GetSoftenedFloat(N->getOperand(0));
419 return MakeLibCall(GetFPLibCall(N->getValueType(0),
420 RTLIB::RINT_F32,
421 RTLIB::RINT_F64,
422 RTLIB::RINT_F80,
423 RTLIB::RINT_PPCF128),
424 NVT, &Op, 1, false, N->getDebugLoc());
425 }
426
SoftenFloatRes_FSIN(SDNode * N)427 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
428 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
429 SDValue Op = GetSoftenedFloat(N->getOperand(0));
430 return MakeLibCall(GetFPLibCall(N->getValueType(0),
431 RTLIB::SIN_F32,
432 RTLIB::SIN_F64,
433 RTLIB::SIN_F80,
434 RTLIB::SIN_PPCF128),
435 NVT, &Op, 1, false, N->getDebugLoc());
436 }
437
SoftenFloatRes_FSQRT(SDNode * N)438 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
439 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
440 SDValue Op = GetSoftenedFloat(N->getOperand(0));
441 return MakeLibCall(GetFPLibCall(N->getValueType(0),
442 RTLIB::SQRT_F32,
443 RTLIB::SQRT_F64,
444 RTLIB::SQRT_F80,
445 RTLIB::SQRT_PPCF128),
446 NVT, &Op, 1, false, N->getDebugLoc());
447 }
448
SoftenFloatRes_FSUB(SDNode * N)449 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
450 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
451 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
452 GetSoftenedFloat(N->getOperand(1)) };
453 return MakeLibCall(GetFPLibCall(N->getValueType(0),
454 RTLIB::SUB_F32,
455 RTLIB::SUB_F64,
456 RTLIB::SUB_F80,
457 RTLIB::SUB_PPCF128),
458 NVT, Ops, 2, false, N->getDebugLoc());
459 }
460
SoftenFloatRes_FTRUNC(SDNode * N)461 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
462 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
463 SDValue Op = GetSoftenedFloat(N->getOperand(0));
464 return MakeLibCall(GetFPLibCall(N->getValueType(0),
465 RTLIB::TRUNC_F32,
466 RTLIB::TRUNC_F64,
467 RTLIB::TRUNC_F80,
468 RTLIB::TRUNC_PPCF128),
469 NVT, &Op, 1, false, N->getDebugLoc());
470 }
471
SoftenFloatRes_LOAD(SDNode * N)472 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
473 LoadSDNode *L = cast<LoadSDNode>(N);
474 EVT VT = N->getValueType(0);
475 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
476 DebugLoc dl = N->getDebugLoc();
477
478 SDValue NewL;
479 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
480 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
481 NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
482 L->getPointerInfo(), NVT, L->isVolatile(),
483 L->isNonTemporal(), false, L->getAlignment());
484 // Legalized the chain result - switch anything that used the old chain to
485 // use the new one.
486 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
487 return NewL;
488 }
489
490 // Do a non-extending load followed by FP_EXTEND.
491 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
492 L->getMemoryVT(), dl, L->getChain(),
493 L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
494 L->getMemoryVT(), L->isVolatile(),
495 L->isNonTemporal(), false, L->getAlignment());
496 // Legalized the chain result - switch anything that used the old chain to
497 // use the new one.
498 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
499 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
500 }
501
SoftenFloatRes_SELECT(SDNode * N)502 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
503 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
504 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
505 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
506 LHS.getValueType(), N->getOperand(0),LHS,RHS);
507 }
508
SoftenFloatRes_SELECT_CC(SDNode * N)509 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
510 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
511 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
512 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
513 LHS.getValueType(), N->getOperand(0),
514 N->getOperand(1), LHS, RHS, N->getOperand(4));
515 }
516
SoftenFloatRes_UNDEF(SDNode * N)517 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
518 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
519 N->getValueType(0)));
520 }
521
SoftenFloatRes_VAARG(SDNode * N)522 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
523 SDValue Chain = N->getOperand(0); // Get the chain.
524 SDValue Ptr = N->getOperand(1); // Get the pointer.
525 EVT VT = N->getValueType(0);
526 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
527 DebugLoc dl = N->getDebugLoc();
528
529 SDValue NewVAARG;
530 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
531 N->getConstantOperandVal(3));
532
533 // Legalized the chain result - switch anything that used the old chain to
534 // use the new one.
535 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
536 return NewVAARG;
537 }
538
SoftenFloatRes_XINT_TO_FP(SDNode * N)539 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
540 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
541 EVT SVT = N->getOperand(0).getValueType();
542 EVT RVT = N->getValueType(0);
543 EVT NVT = EVT();
544 DebugLoc dl = N->getDebugLoc();
545
546 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
547 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
548 // match. Look for an appropriate libcall.
549 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
550 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
551 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
552 NVT = (MVT::SimpleValueType)t;
553 // The source needs to big enough to hold the operand.
554 if (NVT.bitsGE(SVT))
555 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
556 }
557 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
558
559 // Sign/zero extend the argument if the libcall takes a larger type.
560 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
561 NVT, N->getOperand(0));
562 return MakeLibCall(LC, TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
563 &Op, 1, false, dl);
564 }
565
566
567 //===----------------------------------------------------------------------===//
568 // Operand Float to Integer Conversion..
569 //===----------------------------------------------------------------------===//
570
SoftenFloatOperand(SDNode * N,unsigned OpNo)571 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
572 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
573 dbgs() << "\n");
574 SDValue Res = SDValue();
575
576 switch (N->getOpcode()) {
577 default:
578 #ifndef NDEBUG
579 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
580 N->dump(&DAG); dbgs() << "\n";
581 #endif
582 llvm_unreachable("Do not know how to soften this operator's operand!");
583
584 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
585 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
586 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
587 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
588 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
589 case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
590 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
591 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
592 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
593 }
594
595 // If the result is null, the sub-method took care of registering results etc.
596 if (!Res.getNode()) return false;
597
598 // If the result is N, the sub-method updated N in place. Tell the legalizer
599 // core about this.
600 if (Res.getNode() == N)
601 return true;
602
603 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
604 "Invalid operand expansion");
605
606 ReplaceValueWith(SDValue(N, 0), Res);
607 return false;
608 }
609
610 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
611 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
SoftenSetCCOperands(SDValue & NewLHS,SDValue & NewRHS,ISD::CondCode & CCCode,DebugLoc dl)612 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
613 ISD::CondCode &CCCode, DebugLoc dl) {
614 SDValue LHSInt = GetSoftenedFloat(NewLHS);
615 SDValue RHSInt = GetSoftenedFloat(NewRHS);
616 EVT VT = NewLHS.getValueType();
617
618 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
619
620 // Expand into one or more soft-fp libcall(s).
621 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
622 switch (CCCode) {
623 case ISD::SETEQ:
624 case ISD::SETOEQ:
625 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
626 break;
627 case ISD::SETNE:
628 case ISD::SETUNE:
629 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
630 break;
631 case ISD::SETGE:
632 case ISD::SETOGE:
633 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
634 break;
635 case ISD::SETLT:
636 case ISD::SETOLT:
637 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
638 break;
639 case ISD::SETLE:
640 case ISD::SETOLE:
641 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
642 break;
643 case ISD::SETGT:
644 case ISD::SETOGT:
645 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
646 break;
647 case ISD::SETUO:
648 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
649 break;
650 case ISD::SETO:
651 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
652 break;
653 default:
654 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
655 switch (CCCode) {
656 case ISD::SETONE:
657 // SETONE = SETOLT | SETOGT
658 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
659 // Fallthrough
660 case ISD::SETUGT:
661 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
662 break;
663 case ISD::SETUGE:
664 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
665 break;
666 case ISD::SETULT:
667 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
668 break;
669 case ISD::SETULE:
670 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
671 break;
672 case ISD::SETUEQ:
673 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
674 break;
675 default: llvm_unreachable("Do not know how to soften this setcc!");
676 }
677 }
678
679 // Use the target specific return value for comparions lib calls.
680 EVT RetVT = TLI.getCmpLibcallReturnType();
681 SDValue Ops[2] = { LHSInt, RHSInt };
682 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
683 NewRHS = DAG.getConstant(0, RetVT);
684 CCCode = TLI.getCmpLibcallCC(LC1);
685 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
686 SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
687 NewLHS, NewRHS, DAG.getCondCode(CCCode));
688 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
689 NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
690 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
691 NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
692 NewRHS = SDValue();
693 }
694 }
695
SoftenFloatOp_BITCAST(SDNode * N)696 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
697 return DAG.getNode(ISD::BITCAST, N->getDebugLoc(), N->getValueType(0),
698 GetSoftenedFloat(N->getOperand(0)));
699 }
700
SoftenFloatOp_FP_ROUND(SDNode * N)701 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
702 EVT SVT = N->getOperand(0).getValueType();
703 EVT RVT = N->getValueType(0);
704
705 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
706 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
707
708 SDValue Op = GetSoftenedFloat(N->getOperand(0));
709 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
710 }
711
SoftenFloatOp_BR_CC(SDNode * N)712 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
713 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
714 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
715 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
716
717 // If SoftenSetCCOperands returned a scalar, we need to compare the result
718 // against zero to select between true and false values.
719 if (NewRHS.getNode() == 0) {
720 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
721 CCCode = ISD::SETNE;
722 }
723
724 // Update N to have the operands specified.
725 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
726 DAG.getCondCode(CCCode), NewLHS, NewRHS,
727 N->getOperand(4)),
728 0);
729 }
730
SoftenFloatOp_FP_TO_SINT(SDNode * N)731 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
732 EVT RVT = N->getValueType(0);
733 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
734 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
735 SDValue Op = GetSoftenedFloat(N->getOperand(0));
736 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
737 }
738
SoftenFloatOp_FP_TO_UINT(SDNode * N)739 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
740 EVT RVT = N->getValueType(0);
741 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
742 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
743 SDValue Op = GetSoftenedFloat(N->getOperand(0));
744 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
745 }
746
SoftenFloatOp_FP32_TO_FP16(SDNode * N)747 SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
748 EVT RVT = N->getValueType(0);
749 RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
750 SDValue Op = GetSoftenedFloat(N->getOperand(0));
751 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
752 }
753
SoftenFloatOp_SELECT_CC(SDNode * N)754 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
755 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
756 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
757 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
758
759 // If SoftenSetCCOperands returned a scalar, we need to compare the result
760 // against zero to select between true and false values.
761 if (NewRHS.getNode() == 0) {
762 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
763 CCCode = ISD::SETNE;
764 }
765
766 // Update N to have the operands specified.
767 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
768 N->getOperand(2), N->getOperand(3),
769 DAG.getCondCode(CCCode)),
770 0);
771 }
772
SoftenFloatOp_SETCC(SDNode * N)773 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
774 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
775 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
776 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
777
778 // If SoftenSetCCOperands returned a scalar, use it.
779 if (NewRHS.getNode() == 0) {
780 assert(NewLHS.getValueType() == N->getValueType(0) &&
781 "Unexpected setcc expansion!");
782 return NewLHS;
783 }
784
785 // Otherwise, update N to have the operands specified.
786 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
787 DAG.getCondCode(CCCode)),
788 0);
789 }
790
SoftenFloatOp_STORE(SDNode * N,unsigned OpNo)791 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
792 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
793 assert(OpNo == 1 && "Can only soften the stored value!");
794 StoreSDNode *ST = cast<StoreSDNode>(N);
795 SDValue Val = ST->getValue();
796 DebugLoc dl = N->getDebugLoc();
797
798 if (ST->isTruncatingStore())
799 // Do an FP_ROUND followed by a non-truncating store.
800 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
801 Val, DAG.getIntPtrConstant(0)));
802 else
803 Val = GetSoftenedFloat(Val);
804
805 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
806 ST->getPointerInfo(),
807 ST->isVolatile(), ST->isNonTemporal(),
808 ST->getAlignment());
809 }
810
811
812 //===----------------------------------------------------------------------===//
813 // Float Result Expansion
814 //===----------------------------------------------------------------------===//
815
816 /// ExpandFloatResult - This method is called when the specified result of the
817 /// specified node is found to need expansion. At this point, the node may also
818 /// have invalid operands or may have other results that need promotion, we just
819 /// know that (at least) one result needs expansion.
ExpandFloatResult(SDNode * N,unsigned ResNo)820 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
821 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
822 SDValue Lo, Hi;
823 Lo = Hi = SDValue();
824
825 // See if the target wants to custom expand this node.
826 if (CustomLowerNode(N, N->getValueType(ResNo), true))
827 return;
828
829 switch (N->getOpcode()) {
830 default:
831 #ifndef NDEBUG
832 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
833 N->dump(&DAG); dbgs() << "\n";
834 #endif
835 llvm_unreachable("Do not know how to expand the result of this operator!");
836
837 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
838 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
839 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
840
841 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
842 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
843 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
844 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
845 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
846 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
847
848 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
849 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
850 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
851 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
852 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
853 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
854 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
855 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
856 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
857 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
858 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
859 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
860 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
861 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
862 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
863 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
864 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
865 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
866 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
867 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
868 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
869 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
870 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
871 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
872 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
873 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
874 case ISD::SINT_TO_FP:
875 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
876 }
877
878 // If Lo/Hi is null, the sub-method took care of registering results etc.
879 if (Lo.getNode())
880 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
881 }
882
ExpandFloatRes_ConstantFP(SDNode * N,SDValue & Lo,SDValue & Hi)883 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
884 SDValue &Hi) {
885 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
886 assert(NVT.getSizeInBits() == integerPartWidth &&
887 "Do not know how to expand this float constant!");
888 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
889 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, C.getRawData()[1])),
890 NVT);
891 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, C.getRawData()[0])),
892 NVT);
893 }
894
ExpandFloatRes_FABS(SDNode * N,SDValue & Lo,SDValue & Hi)895 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
896 SDValue &Hi) {
897 assert(N->getValueType(0) == MVT::ppcf128 &&
898 "Logic only correct for ppcf128!");
899 DebugLoc dl = N->getDebugLoc();
900 SDValue Tmp;
901 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
902 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
903 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
904 Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
905 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
906 DAG.getCondCode(ISD::SETEQ));
907 }
908
ExpandFloatRes_FADD(SDNode * N,SDValue & Lo,SDValue & Hi)909 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
910 SDValue &Hi) {
911 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
912 RTLIB::ADD_F32, RTLIB::ADD_F64,
913 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
914 N, false);
915 GetPairElements(Call, Lo, Hi);
916 }
917
ExpandFloatRes_FCEIL(SDNode * N,SDValue & Lo,SDValue & Hi)918 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
919 SDValue &Lo, SDValue &Hi) {
920 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
921 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
922 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
923 N, false);
924 GetPairElements(Call, Lo, Hi);
925 }
926
ExpandFloatRes_FCOPYSIGN(SDNode * N,SDValue & Lo,SDValue & Hi)927 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
928 SDValue &Lo, SDValue &Hi) {
929 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
930 RTLIB::COPYSIGN_F32,
931 RTLIB::COPYSIGN_F64,
932 RTLIB::COPYSIGN_F80,
933 RTLIB::COPYSIGN_PPCF128),
934 N, false);
935 GetPairElements(Call, Lo, Hi);
936 }
937
ExpandFloatRes_FCOS(SDNode * N,SDValue & Lo,SDValue & Hi)938 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
939 SDValue &Lo, SDValue &Hi) {
940 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
941 RTLIB::COS_F32, RTLIB::COS_F64,
942 RTLIB::COS_F80, RTLIB::COS_PPCF128),
943 N, false);
944 GetPairElements(Call, Lo, Hi);
945 }
946
ExpandFloatRes_FDIV(SDNode * N,SDValue & Lo,SDValue & Hi)947 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
948 SDValue &Hi) {
949 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
950 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
951 RTLIB::DIV_F32,
952 RTLIB::DIV_F64,
953 RTLIB::DIV_F80,
954 RTLIB::DIV_PPCF128),
955 N->getValueType(0), Ops, 2, false,
956 N->getDebugLoc());
957 GetPairElements(Call, Lo, Hi);
958 }
959
ExpandFloatRes_FEXP(SDNode * N,SDValue & Lo,SDValue & Hi)960 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
961 SDValue &Lo, SDValue &Hi) {
962 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
963 RTLIB::EXP_F32, RTLIB::EXP_F64,
964 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
965 N, false);
966 GetPairElements(Call, Lo, Hi);
967 }
968
ExpandFloatRes_FEXP2(SDNode * N,SDValue & Lo,SDValue & Hi)969 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
970 SDValue &Lo, SDValue &Hi) {
971 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
972 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
973 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
974 N, false);
975 GetPairElements(Call, Lo, Hi);
976 }
977
ExpandFloatRes_FFLOOR(SDNode * N,SDValue & Lo,SDValue & Hi)978 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
979 SDValue &Lo, SDValue &Hi) {
980 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
981 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
982 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
983 N, false);
984 GetPairElements(Call, Lo, Hi);
985 }
986
ExpandFloatRes_FLOG(SDNode * N,SDValue & Lo,SDValue & Hi)987 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
988 SDValue &Lo, SDValue &Hi) {
989 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
990 RTLIB::LOG_F32, RTLIB::LOG_F64,
991 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
992 N, false);
993 GetPairElements(Call, Lo, Hi);
994 }
995
ExpandFloatRes_FLOG2(SDNode * N,SDValue & Lo,SDValue & Hi)996 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
997 SDValue &Lo, SDValue &Hi) {
998 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
999 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
1000 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
1001 N, false);
1002 GetPairElements(Call, Lo, Hi);
1003 }
1004
ExpandFloatRes_FLOG10(SDNode * N,SDValue & Lo,SDValue & Hi)1005 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
1006 SDValue &Lo, SDValue &Hi) {
1007 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1008 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
1009 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
1010 N, false);
1011 GetPairElements(Call, Lo, Hi);
1012 }
1013
ExpandFloatRes_FMA(SDNode * N,SDValue & Lo,SDValue & Hi)1014 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
1015 SDValue &Hi) {
1016 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
1017 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1018 RTLIB::FMA_F32,
1019 RTLIB::FMA_F64,
1020 RTLIB::FMA_F80,
1021 RTLIB::FMA_PPCF128),
1022 N->getValueType(0), Ops, 3, false,
1023 N->getDebugLoc());
1024 GetPairElements(Call, Lo, Hi);
1025 }
1026
ExpandFloatRes_FMUL(SDNode * N,SDValue & Lo,SDValue & Hi)1027 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1028 SDValue &Hi) {
1029 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1030 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1031 RTLIB::MUL_F32,
1032 RTLIB::MUL_F64,
1033 RTLIB::MUL_F80,
1034 RTLIB::MUL_PPCF128),
1035 N->getValueType(0), Ops, 2, false,
1036 N->getDebugLoc());
1037 GetPairElements(Call, Lo, Hi);
1038 }
1039
ExpandFloatRes_FNEARBYINT(SDNode * N,SDValue & Lo,SDValue & Hi)1040 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1041 SDValue &Lo, SDValue &Hi) {
1042 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1043 RTLIB::NEARBYINT_F32,
1044 RTLIB::NEARBYINT_F64,
1045 RTLIB::NEARBYINT_F80,
1046 RTLIB::NEARBYINT_PPCF128),
1047 N, false);
1048 GetPairElements(Call, Lo, Hi);
1049 }
1050
ExpandFloatRes_FNEG(SDNode * N,SDValue & Lo,SDValue & Hi)1051 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1052 SDValue &Hi) {
1053 DebugLoc dl = N->getDebugLoc();
1054 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1055 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1056 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1057 }
1058
ExpandFloatRes_FP_EXTEND(SDNode * N,SDValue & Lo,SDValue & Hi)1059 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1060 SDValue &Hi) {
1061 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1062 Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
1063 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1064 }
1065
ExpandFloatRes_FPOW(SDNode * N,SDValue & Lo,SDValue & Hi)1066 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1067 SDValue &Lo, SDValue &Hi) {
1068 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1069 RTLIB::POW_F32, RTLIB::POW_F64,
1070 RTLIB::POW_F80, RTLIB::POW_PPCF128),
1071 N, false);
1072 GetPairElements(Call, Lo, Hi);
1073 }
1074
ExpandFloatRes_FPOWI(SDNode * N,SDValue & Lo,SDValue & Hi)1075 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1076 SDValue &Lo, SDValue &Hi) {
1077 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1078 RTLIB::POWI_F32, RTLIB::POWI_F64,
1079 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1080 N, false);
1081 GetPairElements(Call, Lo, Hi);
1082 }
1083
ExpandFloatRes_FRINT(SDNode * N,SDValue & Lo,SDValue & Hi)1084 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1085 SDValue &Lo, SDValue &Hi) {
1086 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1087 RTLIB::RINT_F32, RTLIB::RINT_F64,
1088 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1089 N, false);
1090 GetPairElements(Call, Lo, Hi);
1091 }
1092
ExpandFloatRes_FSIN(SDNode * N,SDValue & Lo,SDValue & Hi)1093 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1094 SDValue &Lo, SDValue &Hi) {
1095 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1096 RTLIB::SIN_F32, RTLIB::SIN_F64,
1097 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1098 N, false);
1099 GetPairElements(Call, Lo, Hi);
1100 }
1101
ExpandFloatRes_FSQRT(SDNode * N,SDValue & Lo,SDValue & Hi)1102 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1103 SDValue &Lo, SDValue &Hi) {
1104 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1105 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1106 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1107 N, false);
1108 GetPairElements(Call, Lo, Hi);
1109 }
1110
ExpandFloatRes_FSUB(SDNode * N,SDValue & Lo,SDValue & Hi)1111 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1112 SDValue &Hi) {
1113 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1114 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1115 RTLIB::SUB_F32,
1116 RTLIB::SUB_F64,
1117 RTLIB::SUB_F80,
1118 RTLIB::SUB_PPCF128),
1119 N->getValueType(0), Ops, 2, false,
1120 N->getDebugLoc());
1121 GetPairElements(Call, Lo, Hi);
1122 }
1123
ExpandFloatRes_FTRUNC(SDNode * N,SDValue & Lo,SDValue & Hi)1124 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1125 SDValue &Lo, SDValue &Hi) {
1126 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1127 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1128 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1129 N, false);
1130 GetPairElements(Call, Lo, Hi);
1131 }
1132
ExpandFloatRes_LOAD(SDNode * N,SDValue & Lo,SDValue & Hi)1133 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1134 SDValue &Hi) {
1135 if (ISD::isNormalLoad(N)) {
1136 ExpandRes_NormalLoad(N, Lo, Hi);
1137 return;
1138 }
1139
1140 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1141 LoadSDNode *LD = cast<LoadSDNode>(N);
1142 SDValue Chain = LD->getChain();
1143 SDValue Ptr = LD->getBasePtr();
1144 DebugLoc dl = N->getDebugLoc();
1145
1146 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1147 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1148 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1149
1150 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1151 LD->getPointerInfo(), LD->getMemoryVT(), LD->isVolatile(),
1152 LD->isNonTemporal(), LD->getAlignment());
1153
1154 // Remember the chain.
1155 Chain = Hi.getValue(1);
1156
1157 // The low part is zero.
1158 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1159
1160 // Modified the chain - switch anything that used the old chain to use the
1161 // new one.
1162 ReplaceValueWith(SDValue(LD, 1), Chain);
1163 }
1164
ExpandFloatRes_XINT_TO_FP(SDNode * N,SDValue & Lo,SDValue & Hi)1165 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1166 SDValue &Hi) {
1167 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1168 EVT VT = N->getValueType(0);
1169 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1170 SDValue Src = N->getOperand(0);
1171 EVT SrcVT = Src.getValueType();
1172 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1173 DebugLoc dl = N->getDebugLoc();
1174
1175 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1176 // When promoting partial word types to i32 we must honor the signedness,
1177 // though.
1178 if (SrcVT.bitsLE(MVT::i32)) {
1179 // The integer can be represented exactly in an f64.
1180 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1181 MVT::i32, Src);
1182 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1183 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1184 } else {
1185 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1186 if (SrcVT.bitsLE(MVT::i64)) {
1187 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1188 MVT::i64, Src);
1189 LC = RTLIB::SINTTOFP_I64_PPCF128;
1190 } else if (SrcVT.bitsLE(MVT::i128)) {
1191 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1192 LC = RTLIB::SINTTOFP_I128_PPCF128;
1193 }
1194 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1195
1196 Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1197 GetPairElements(Hi, Lo, Hi);
1198 }
1199
1200 if (isSigned)
1201 return;
1202
1203 // Unsigned - fix up the SINT_TO_FP value just calculated.
1204 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1205 SrcVT = Src.getValueType();
1206
1207 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1208 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1209 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1210 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1211 ArrayRef<uint64_t> Parts;
1212
1213 switch (SrcVT.getSimpleVT().SimpleTy) {
1214 default:
1215 llvm_unreachable("Unsupported UINT_TO_FP!");
1216 case MVT::i32:
1217 Parts = TwoE32;
1218 break;
1219 case MVT::i64:
1220 Parts = TwoE64;
1221 break;
1222 case MVT::i128:
1223 Parts = TwoE128;
1224 break;
1225 }
1226
1227 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1228 DAG.getConstantFP(APFloat(APInt(128, Parts)),
1229 MVT::ppcf128));
1230 Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1231 Lo, Hi, DAG.getCondCode(ISD::SETLT));
1232 GetPairElements(Lo, Lo, Hi);
1233 }
1234
1235
1236 //===----------------------------------------------------------------------===//
1237 // Float Operand Expansion
1238 //===----------------------------------------------------------------------===//
1239
1240 /// ExpandFloatOperand - This method is called when the specified operand of the
1241 /// specified node is found to need expansion. At this point, all of the result
1242 /// types of the node are known to be legal, but other operands of the node may
1243 /// need promotion or expansion as well as the specified one.
ExpandFloatOperand(SDNode * N,unsigned OpNo)1244 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1245 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1246 SDValue Res = SDValue();
1247
1248 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1249 == TargetLowering::Custom)
1250 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1251
1252 if (Res.getNode() == 0) {
1253 switch (N->getOpcode()) {
1254 default:
1255 #ifndef NDEBUG
1256 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1257 N->dump(&DAG); dbgs() << "\n";
1258 #endif
1259 llvm_unreachable("Do not know how to expand this operator's operand!");
1260
1261 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1262 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1263 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1264
1265 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1266 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1267 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1268 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1269 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1270 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1271 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1272 OpNo); break;
1273 }
1274 }
1275
1276 // If the result is null, the sub-method took care of registering results etc.
1277 if (!Res.getNode()) return false;
1278
1279 // If the result is N, the sub-method updated N in place. Tell the legalizer
1280 // core about this.
1281 if (Res.getNode() == N)
1282 return true;
1283
1284 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1285 "Invalid operand expansion");
1286
1287 ReplaceValueWith(SDValue(N, 0), Res);
1288 return false;
1289 }
1290
1291 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1292 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
FloatExpandSetCCOperands(SDValue & NewLHS,SDValue & NewRHS,ISD::CondCode & CCCode,DebugLoc dl)1293 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1294 SDValue &NewRHS,
1295 ISD::CondCode &CCCode,
1296 DebugLoc dl) {
1297 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1298 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1299 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1300
1301 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1302
1303 // FIXME: This generated code sucks. We want to generate
1304 // FCMPU crN, hi1, hi2
1305 // BNE crN, L:
1306 // FCMPU crN, lo1, lo2
1307 // The following can be improved, but not that much.
1308 SDValue Tmp1, Tmp2, Tmp3;
1309 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1310 LHSHi, RHSHi, ISD::SETOEQ);
1311 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1312 LHSLo, RHSLo, CCCode);
1313 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1314 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1315 LHSHi, RHSHi, ISD::SETUNE);
1316 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1317 LHSHi, RHSHi, CCCode);
1318 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1319 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1320 NewRHS = SDValue(); // LHS is the result, not a compare.
1321 }
1322
ExpandFloatOp_BR_CC(SDNode * N)1323 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1324 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1325 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1326 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1327
1328 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1329 // against zero to select between true and false values.
1330 if (NewRHS.getNode() == 0) {
1331 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1332 CCCode = ISD::SETNE;
1333 }
1334
1335 // Update N to have the operands specified.
1336 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1337 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1338 N->getOperand(4)), 0);
1339 }
1340
ExpandFloatOp_FP_ROUND(SDNode * N)1341 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1342 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1343 "Logic only correct for ppcf128!");
1344 SDValue Lo, Hi;
1345 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1346 // Round it the rest of the way (e.g. to f32) if needed.
1347 return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1348 N->getValueType(0), Hi, N->getOperand(1));
1349 }
1350
ExpandFloatOp_FP_TO_SINT(SDNode * N)1351 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1352 EVT RVT = N->getValueType(0);
1353 DebugLoc dl = N->getDebugLoc();
1354
1355 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1356 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1357 if (RVT == MVT::i32) {
1358 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1359 "Logic only correct for ppcf128!");
1360 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1361 N->getOperand(0), DAG.getValueType(MVT::f64));
1362 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1363 DAG.getIntPtrConstant(1));
1364 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1365 }
1366
1367 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1368 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1369 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1370 }
1371
ExpandFloatOp_FP_TO_UINT(SDNode * N)1372 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1373 EVT RVT = N->getValueType(0);
1374 DebugLoc dl = N->getDebugLoc();
1375
1376 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1377 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1378 if (RVT == MVT::i32) {
1379 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1380 "Logic only correct for ppcf128!");
1381 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1382 APFloat APF = APFloat(APInt(128, TwoE31));
1383 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1384 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1385 // FIXME: generated code sucks.
1386 return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1387 DAG.getNode(ISD::ADD, dl, MVT::i32,
1388 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1389 DAG.getNode(ISD::FSUB, dl,
1390 MVT::ppcf128,
1391 N->getOperand(0),
1392 Tmp)),
1393 DAG.getConstant(0x80000000, MVT::i32)),
1394 DAG.getNode(ISD::FP_TO_SINT, dl,
1395 MVT::i32, N->getOperand(0)),
1396 DAG.getCondCode(ISD::SETGE));
1397 }
1398
1399 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1400 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1401 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1402 }
1403
ExpandFloatOp_SELECT_CC(SDNode * N)1404 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1405 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1406 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1407 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1408
1409 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1410 // against zero to select between true and false values.
1411 if (NewRHS.getNode() == 0) {
1412 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1413 CCCode = ISD::SETNE;
1414 }
1415
1416 // Update N to have the operands specified.
1417 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1418 N->getOperand(2), N->getOperand(3),
1419 DAG.getCondCode(CCCode)), 0);
1420 }
1421
ExpandFloatOp_SETCC(SDNode * N)1422 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1423 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1424 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1425 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1426
1427 // If ExpandSetCCOperands returned a scalar, use it.
1428 if (NewRHS.getNode() == 0) {
1429 assert(NewLHS.getValueType() == N->getValueType(0) &&
1430 "Unexpected setcc expansion!");
1431 return NewLHS;
1432 }
1433
1434 // Otherwise, update N to have the operands specified.
1435 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1436 DAG.getCondCode(CCCode)), 0);
1437 }
1438
ExpandFloatOp_STORE(SDNode * N,unsigned OpNo)1439 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1440 if (ISD::isNormalStore(N))
1441 return ExpandOp_NormalStore(N, OpNo);
1442
1443 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1444 assert(OpNo == 1 && "Can only expand the stored value so far");
1445 StoreSDNode *ST = cast<StoreSDNode>(N);
1446
1447 SDValue Chain = ST->getChain();
1448 SDValue Ptr = ST->getBasePtr();
1449
1450 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1451 ST->getValue().getValueType());
1452 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1453 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1454 (void)NVT;
1455
1456 SDValue Lo, Hi;
1457 GetExpandedOp(ST->getValue(), Lo, Hi);
1458
1459 return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1460 ST->getPointerInfo(),
1461 ST->getMemoryVT(), ST->isVolatile(),
1462 ST->isNonTemporal(), ST->getAlignment());
1463 }
1464