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