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Fixed some bugs.
[llvm/zpu.git] / lib / CodeGen / SelectionDAG / LegalizeFloatTypes.cpp
blobb1506995b3559c3b87c733c269bed190cb9ccaea
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.
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
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
105 SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
106 return BitConvertToInteger(N->getOperand(0));
107 }
108
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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?
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
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
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
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
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
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
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
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
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
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
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->getPointerInfo(), 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(), L->getPointerInfo(),
470 L->getMemoryVT(), L->isVolatile(),
471 L->isNonTemporal(), L->getAlignment());
472 // Legalized the chain result - switch anything that used the old chain to
473 // use the new one.
474 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
475 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
476 }
477
478 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
479 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
480 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
481 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
482 LHS.getValueType(), N->getOperand(0),LHS,RHS);
483 }
484
485 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
486 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
487 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
488 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
489 LHS.getValueType(), N->getOperand(0),
490 N->getOperand(1), LHS, RHS, N->getOperand(4));
491 }
492
493 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
494 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
495 N->getValueType(0)));
496 }
497
498 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
499 SDValue Chain = N->getOperand(0); // Get the chain.
500 SDValue Ptr = N->getOperand(1); // Get the pointer.
501 EVT VT = N->getValueType(0);
502 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
503 DebugLoc dl = N->getDebugLoc();
504
505 SDValue NewVAARG;
506 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
507 N->getConstantOperandVal(3));
508
509 // Legalized the chain result - switch anything that used the old chain to
510 // use the new one.
511 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
512 return NewVAARG;
513 }
514
515 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
516 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
517 EVT SVT = N->getOperand(0).getValueType();
518 EVT RVT = N->getValueType(0);
519 EVT NVT = EVT();
520 DebugLoc dl = N->getDebugLoc();
521
522 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
523 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
524 // match. Look for an appropriate libcall.
525 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
526 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
527 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
528 NVT = (MVT::SimpleValueType)t;
529 // The source needs to big enough to hold the operand.
530 if (NVT.bitsGE(SVT))
531 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
532 }
533 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
534
535 // Sign/zero extend the argument if the libcall takes a larger type.
536 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
537 NVT, N->getOperand(0));
538 return MakeLibCall(LC, TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
539 &Op, 1, false, dl);
540 }
541
542
543 //===----------------------------------------------------------------------===//
544 // Operand Float to Integer Conversion..
545 //===----------------------------------------------------------------------===//
546
547 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
548 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
549 dbgs() << "\n");
550 SDValue Res = SDValue();
551
552 switch (N->getOpcode()) {
553 default:
554 #ifndef NDEBUG
555 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
556 N->dump(&DAG); dbgs() << "\n";
557 #endif
558 llvm_unreachable("Do not know how to soften this operator's operand!");
559
560 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
561 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
562 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
563 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
564 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
565 case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
566 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
567 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
568 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
569 }
570
571 // If the result is null, the sub-method took care of registering results etc.
572 if (!Res.getNode()) return false;
573
574 // If the result is N, the sub-method updated N in place. Tell the legalizer
575 // core about this.
576 if (Res.getNode() == N)
577 return true;
578
579 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
580 "Invalid operand expansion");
581
582 ReplaceValueWith(SDValue(N, 0), Res);
583 return false;
584 }
585
586 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
587 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
588 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
589 ISD::CondCode &CCCode, DebugLoc dl) {
590 SDValue LHSInt = GetSoftenedFloat(NewLHS);
591 SDValue RHSInt = GetSoftenedFloat(NewRHS);
592 EVT VT = NewLHS.getValueType();
593
594 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
595
596 // Expand into one or more soft-fp libcall(s).
597 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
598 switch (CCCode) {
599 case ISD::SETEQ:
600 case ISD::SETOEQ:
601 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
602 break;
603 case ISD::SETNE:
604 case ISD::SETUNE:
605 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
606 break;
607 case ISD::SETGE:
608 case ISD::SETOGE:
609 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
610 break;
611 case ISD::SETLT:
612 case ISD::SETOLT:
613 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
614 break;
615 case ISD::SETLE:
616 case ISD::SETOLE:
617 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
618 break;
619 case ISD::SETGT:
620 case ISD::SETOGT:
621 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
622 break;
623 case ISD::SETUO:
624 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
625 break;
626 case ISD::SETO:
627 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
628 break;
629 default:
630 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
631 switch (CCCode) {
632 case ISD::SETONE:
633 // SETONE = SETOLT | SETOGT
634 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
635 // Fallthrough
636 case ISD::SETUGT:
637 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
638 break;
639 case ISD::SETUGE:
640 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
641 break;
642 case ISD::SETULT:
643 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
644 break;
645 case ISD::SETULE:
646 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
647 break;
648 case ISD::SETUEQ:
649 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
650 break;
651 default: assert(false && "Do not know how to soften this setcc!");
652 }
653 }
654
655 // Use the target specific return value for comparions lib calls.
656 EVT RetVT = TLI.getCmpLibcallReturnType();
657 SDValue Ops[2] = { LHSInt, RHSInt };
658 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
659 NewRHS = DAG.getConstant(0, RetVT);
660 CCCode = TLI.getCmpLibcallCC(LC1);
661 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
662 SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
663 NewLHS, NewRHS, DAG.getCondCode(CCCode));
664 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
665 NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
666 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
667 NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
668 NewRHS = SDValue();
669 }
670 }
671
672 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
673 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0),
674 GetSoftenedFloat(N->getOperand(0)));
675 }
676
677 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
678 EVT SVT = N->getOperand(0).getValueType();
679 EVT RVT = N->getValueType(0);
680
681 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
682 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
683
684 SDValue Op = GetSoftenedFloat(N->getOperand(0));
685 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
686 }
687
688 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
689 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
690 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
691 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
692
693 // If SoftenSetCCOperands returned a scalar, we need to compare the result
694 // against zero to select between true and false values.
695 if (NewRHS.getNode() == 0) {
696 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
697 CCCode = ISD::SETNE;
698 }
699
700 // Update N to have the operands specified.
701 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
702 DAG.getCondCode(CCCode), NewLHS, NewRHS,
703 N->getOperand(4)),
704 0);
705 }
706
707 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
708 EVT RVT = N->getValueType(0);
709 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
710 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
711 SDValue Op = GetSoftenedFloat(N->getOperand(0));
712 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
713 }
714
715 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
716 EVT RVT = N->getValueType(0);
717 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
718 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
719 SDValue Op = GetSoftenedFloat(N->getOperand(0));
720 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
721 }
722
723 SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
724 EVT RVT = N->getValueType(0);
725 RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
726 SDValue Op = GetSoftenedFloat(N->getOperand(0));
727 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
728 }
729
730 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
731 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
732 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
733 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
734
735 // If SoftenSetCCOperands returned a scalar, we need to compare the result
736 // against zero to select between true and false values.
737 if (NewRHS.getNode() == 0) {
738 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
739 CCCode = ISD::SETNE;
740 }
741
742 // Update N to have the operands specified.
743 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
744 N->getOperand(2), N->getOperand(3),
745 DAG.getCondCode(CCCode)),
746 0);
747 }
748
749 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
750 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
751 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
752 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
753
754 // If SoftenSetCCOperands returned a scalar, use it.
755 if (NewRHS.getNode() == 0) {
756 assert(NewLHS.getValueType() == N->getValueType(0) &&
757 "Unexpected setcc expansion!");
758 return NewLHS;
759 }
760
761 // Otherwise, update N to have the operands specified.
762 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
763 DAG.getCondCode(CCCode)),
764 0);
765 }
766
767 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
768 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
769 assert(OpNo == 1 && "Can only soften the stored value!");
770 StoreSDNode *ST = cast<StoreSDNode>(N);
771 SDValue Val = ST->getValue();
772 DebugLoc dl = N->getDebugLoc();
773
774 if (ST->isTruncatingStore())
775 // Do an FP_ROUND followed by a non-truncating store.
776 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
777 Val, DAG.getIntPtrConstant(0)));
778 else
779 Val = GetSoftenedFloat(Val);
780
781 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
782 ST->getPointerInfo(),
783 ST->isVolatile(), ST->isNonTemporal(),
784 ST->getAlignment());
785 }
786
787
788 //===----------------------------------------------------------------------===//
789 // Float Result Expansion
790 //===----------------------------------------------------------------------===//
791
792 /// ExpandFloatResult - This method is called when the specified result of the
793 /// specified node is found to need expansion. At this point, the node may also
794 /// have invalid operands or may have other results that need promotion, we just
795 /// know that (at least) one result needs expansion.
796 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
797 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
798 SDValue Lo, Hi;
799 Lo = Hi = SDValue();
800
801 // See if the target wants to custom expand this node.
802 if (CustomLowerNode(N, N->getValueType(ResNo), true))
803 return;
804
805 switch (N->getOpcode()) {
806 default:
807 #ifndef NDEBUG
808 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
809 N->dump(&DAG); dbgs() << "\n";
810 #endif
811 llvm_unreachable("Do not know how to expand the result of this operator!");
812
813 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
814 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
815 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
816 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
817
818 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
819 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
820 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
821 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
822 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
823
824 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
825 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
826 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
827 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
828 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
829 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
830 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
831 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
832 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
833 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
834 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
835 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
836 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
837 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
838 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
839 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
840 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
841 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
842 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
843 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
844 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
845 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
846 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
847 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
848 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
849 case ISD::SINT_TO_FP:
850 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
851 }
852
853 // If Lo/Hi is null, the sub-method took care of registering results etc.
854 if (Lo.getNode())
855 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
856 }
857
858 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
859 SDValue &Hi) {
860 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
861 assert(NVT.getSizeInBits() == integerPartWidth &&
862 "Do not know how to expand this float constant!");
863 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
864 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
865 &C.getRawData()[1])), NVT);
866 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
867 &C.getRawData()[0])), NVT);
868 }
869
870 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
871 SDValue &Hi) {
872 assert(N->getValueType(0) == MVT::ppcf128 &&
873 "Logic only correct for ppcf128!");
874 DebugLoc dl = N->getDebugLoc();
875 SDValue Tmp;
876 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
877 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
878 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
879 Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
880 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
881 DAG.getCondCode(ISD::SETEQ));
882 }
883
884 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
885 SDValue &Hi) {
886 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
887 RTLIB::ADD_F32, RTLIB::ADD_F64,
888 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
889 N, false);
890 GetPairElements(Call, Lo, Hi);
891 }
892
893 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
894 SDValue &Lo, SDValue &Hi) {
895 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
896 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
897 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
898 N, false);
899 GetPairElements(Call, Lo, Hi);
900 }
901
902 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
903 SDValue &Lo, SDValue &Hi) {
904 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
905 RTLIB::COPYSIGN_F32,
906 RTLIB::COPYSIGN_F64,
907 RTLIB::COPYSIGN_F80,
908 RTLIB::COPYSIGN_PPCF128),
909 N, false);
910 GetPairElements(Call, Lo, Hi);
911 }
912
913 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
914 SDValue &Lo, SDValue &Hi) {
915 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
916 RTLIB::COS_F32, RTLIB::COS_F64,
917 RTLIB::COS_F80, RTLIB::COS_PPCF128),
918 N, false);
919 GetPairElements(Call, Lo, Hi);
920 }
921
922 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
923 SDValue &Hi) {
924 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
925 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
926 RTLIB::DIV_F32,
927 RTLIB::DIV_F64,
928 RTLIB::DIV_F80,
929 RTLIB::DIV_PPCF128),
930 N->getValueType(0), Ops, 2, false,
931 N->getDebugLoc());
932 GetPairElements(Call, Lo, Hi);
933 }
934
935 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
936 SDValue &Lo, SDValue &Hi) {
937 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
938 RTLIB::EXP_F32, RTLIB::EXP_F64,
939 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
940 N, false);
941 GetPairElements(Call, Lo, Hi);
942 }
943
944 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
945 SDValue &Lo, SDValue &Hi) {
946 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
947 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
948 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
949 N, false);
950 GetPairElements(Call, Lo, Hi);
951 }
952
953 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
954 SDValue &Lo, SDValue &Hi) {
955 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
956 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
957 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
958 N, false);
959 GetPairElements(Call, Lo, Hi);
960 }
961
962 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
963 SDValue &Lo, SDValue &Hi) {
964 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
965 RTLIB::LOG_F32, RTLIB::LOG_F64,
966 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
967 N, false);
968 GetPairElements(Call, Lo, Hi);
969 }
970
971 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
972 SDValue &Lo, SDValue &Hi) {
973 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
974 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
975 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
976 N, false);
977 GetPairElements(Call, Lo, Hi);
978 }
979
980 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
981 SDValue &Lo, SDValue &Hi) {
982 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
983 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
984 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
985 N, false);
986 GetPairElements(Call, Lo, Hi);
987 }
988
989 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
990 SDValue &Hi) {
991 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
992 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
993 RTLIB::MUL_F32,
994 RTLIB::MUL_F64,
995 RTLIB::MUL_F80,
996 RTLIB::MUL_PPCF128),
997 N->getValueType(0), Ops, 2, false,
998 N->getDebugLoc());
999 GetPairElements(Call, Lo, Hi);
1000 }
1001
1002 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1003 SDValue &Lo, SDValue &Hi) {
1004 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1005 RTLIB::NEARBYINT_F32,
1006 RTLIB::NEARBYINT_F64,
1007 RTLIB::NEARBYINT_F80,
1008 RTLIB::NEARBYINT_PPCF128),
1009 N, false);
1010 GetPairElements(Call, Lo, Hi);
1011 }
1012
1013 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1014 SDValue &Hi) {
1015 DebugLoc dl = N->getDebugLoc();
1016 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1017 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1018 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1019 }
1020
1021 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1022 SDValue &Hi) {
1023 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1024 Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
1025 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1026 }
1027
1028 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1029 SDValue &Lo, SDValue &Hi) {
1030 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1031 RTLIB::POW_F32, RTLIB::POW_F64,
1032 RTLIB::POW_F80, RTLIB::POW_PPCF128),
1033 N, false);
1034 GetPairElements(Call, Lo, Hi);
1035 }
1036
1037 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1038 SDValue &Lo, SDValue &Hi) {
1039 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1040 RTLIB::POWI_F32, RTLIB::POWI_F64,
1041 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1042 N, false);
1043 GetPairElements(Call, Lo, Hi);
1044 }
1045
1046 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1047 SDValue &Lo, SDValue &Hi) {
1048 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1049 RTLIB::RINT_F32, RTLIB::RINT_F64,
1050 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1051 N, false);
1052 GetPairElements(Call, Lo, Hi);
1053 }
1054
1055 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1056 SDValue &Lo, SDValue &Hi) {
1057 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1058 RTLIB::SIN_F32, RTLIB::SIN_F64,
1059 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1060 N, false);
1061 GetPairElements(Call, Lo, Hi);
1062 }
1063
1064 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1065 SDValue &Lo, SDValue &Hi) {
1066 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1067 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1068 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1069 N, false);
1070 GetPairElements(Call, Lo, Hi);
1071 }
1072
1073 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1074 SDValue &Hi) {
1075 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1076 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1077 RTLIB::SUB_F32,
1078 RTLIB::SUB_F64,
1079 RTLIB::SUB_F80,
1080 RTLIB::SUB_PPCF128),
1081 N->getValueType(0), Ops, 2, false,
1082 N->getDebugLoc());
1083 GetPairElements(Call, Lo, Hi);
1084 }
1085
1086 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1087 SDValue &Lo, SDValue &Hi) {
1088 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1089 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1090 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1091 N, false);
1092 GetPairElements(Call, Lo, Hi);
1093 }
1094
1095 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1096 SDValue &Hi) {
1097 if (ISD::isNormalLoad(N)) {
1098 ExpandRes_NormalLoad(N, Lo, Hi);
1099 return;
1100 }
1101
1102 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1103 LoadSDNode *LD = cast<LoadSDNode>(N);
1104 SDValue Chain = LD->getChain();
1105 SDValue Ptr = LD->getBasePtr();
1106 DebugLoc dl = N->getDebugLoc();
1107
1108 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1109 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1110 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1111
1112 Hi = DAG.getExtLoad(LD->getExtensionType(), NVT, dl, Chain, Ptr,
1113 LD->getPointerInfo(), LD->getMemoryVT(), LD->isVolatile(),
1114 LD->isNonTemporal(), LD->getAlignment());
1115
1116 // Remember the chain.
1117 Chain = Hi.getValue(1);
1118
1119 // The low part is zero.
1120 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1121
1122 // Modified the chain - switch anything that used the old chain to use the
1123 // new one.
1124 ReplaceValueWith(SDValue(LD, 1), Chain);
1125 }
1126
1127 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1128 SDValue &Hi) {
1129 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1130 EVT VT = N->getValueType(0);
1131 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1132 SDValue Src = N->getOperand(0);
1133 EVT SrcVT = Src.getValueType();
1134 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1135 DebugLoc dl = N->getDebugLoc();
1136
1137 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1138 // When promoting partial word types to i32 we must honor the signedness,
1139 // though.
1140 if (SrcVT.bitsLE(MVT::i32)) {
1141 // The integer can be represented exactly in an f64.
1142 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1143 MVT::i32, Src);
1144 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1145 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1146 } else {
1147 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1148 if (SrcVT.bitsLE(MVT::i64)) {
1149 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1150 MVT::i64, Src);
1151 LC = RTLIB::SINTTOFP_I64_PPCF128;
1152 } else if (SrcVT.bitsLE(MVT::i128)) {
1153 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1154 LC = RTLIB::SINTTOFP_I128_PPCF128;
1155 }
1156 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1157
1158 Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1159 GetPairElements(Hi, Lo, Hi);
1160 }
1161
1162 if (isSigned)
1163 return;
1164
1165 // Unsigned - fix up the SINT_TO_FP value just calculated.
1166 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1167 SrcVT = Src.getValueType();
1168
1169 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1170 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1171 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1172 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1173 const uint64_t *Parts = 0;
1174
1175 switch (SrcVT.getSimpleVT().SimpleTy) {
1176 default:
1177 assert(false && "Unsupported UINT_TO_FP!");
1178 case MVT::i32:
1179 Parts = TwoE32;
1180 break;
1181 case MVT::i64:
1182 Parts = TwoE64;
1183 break;
1184 case MVT::i128:
1185 Parts = TwoE128;
1186 break;
1187 }
1188
1189 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1190 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1191 MVT::ppcf128));
1192 Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1193 Lo, Hi, DAG.getCondCode(ISD::SETLT));
1194 GetPairElements(Lo, Lo, Hi);
1195 }
1196
1197
1198 //===----------------------------------------------------------------------===//
1199 // Float Operand Expansion
1200 //===----------------------------------------------------------------------===//
1201
1202 /// ExpandFloatOperand - This method is called when the specified operand of the
1203 /// specified node is found to need expansion. At this point, all of the result
1204 /// types of the node are known to be legal, but other operands of the node may
1205 /// need promotion or expansion as well as the specified one.
1206 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1207 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1208 SDValue Res = SDValue();
1209
1210 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1211 == TargetLowering::Custom)
1212 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1213
1214 if (Res.getNode() == 0) {
1215 switch (N->getOpcode()) {
1216 default:
1217 #ifndef NDEBUG
1218 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1219 N->dump(&DAG); dbgs() << "\n";
1220 #endif
1221 llvm_unreachable("Do not know how to expand this operator's operand!");
1222
1223 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1224 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1225 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1226
1227 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1228 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1229 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1230 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1231 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1232 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1233 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1234 OpNo); break;
1235 }
1236 }
1237
1238 // If the result is null, the sub-method took care of registering results etc.
1239 if (!Res.getNode()) return false;
1240
1241 // If the result is N, the sub-method updated N in place. Tell the legalizer
1242 // core about this.
1243 if (Res.getNode() == N)
1244 return true;
1245
1246 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1247 "Invalid operand expansion");
1248
1249 ReplaceValueWith(SDValue(N, 0), Res);
1250 return false;
1251 }
1252
1253 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1254 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1255 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1256 SDValue &NewRHS,
1257 ISD::CondCode &CCCode,
1258 DebugLoc dl) {
1259 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1260 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1261 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1262
1263 EVT VT = NewLHS.getValueType();
1264 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1265
1266 // FIXME: This generated code sucks. We want to generate
1267 // FCMPU crN, hi1, hi2
1268 // BNE crN, L:
1269 // FCMPU crN, lo1, lo2
1270 // The following can be improved, but not that much.
1271 SDValue Tmp1, Tmp2, Tmp3;
1272 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1273 LHSHi, RHSHi, ISD::SETOEQ);
1274 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1275 LHSLo, RHSLo, CCCode);
1276 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1277 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1278 LHSHi, RHSHi, ISD::SETUNE);
1279 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1280 LHSHi, RHSHi, CCCode);
1281 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1282 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1283 NewRHS = SDValue(); // LHS is the result, not a compare.
1284 }
1285
1286 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1287 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1288 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1289 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1290
1291 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1292 // against zero to select between true and false values.
1293 if (NewRHS.getNode() == 0) {
1294 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1295 CCCode = ISD::SETNE;
1296 }
1297
1298 // Update N to have the operands specified.
1299 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1300 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1301 N->getOperand(4)), 0);
1302 }
1303
1304 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1305 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1306 "Logic only correct for ppcf128!");
1307 SDValue Lo, Hi;
1308 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1309 // Round it the rest of the way (e.g. to f32) if needed.
1310 return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1311 N->getValueType(0), Hi, N->getOperand(1));
1312 }
1313
1314 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1315 EVT RVT = N->getValueType(0);
1316 DebugLoc dl = N->getDebugLoc();
1317
1318 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1319 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1320 if (RVT == MVT::i32) {
1321 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1322 "Logic only correct for ppcf128!");
1323 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1324 N->getOperand(0), DAG.getValueType(MVT::f64));
1325 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1326 DAG.getIntPtrConstant(1));
1327 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1328 }
1329
1330 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1331 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1332 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1333 }
1334
1335 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1336 EVT RVT = N->getValueType(0);
1337 DebugLoc dl = N->getDebugLoc();
1338
1339 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1340 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1341 if (RVT == MVT::i32) {
1342 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1343 "Logic only correct for ppcf128!");
1344 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1345 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1346 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1347 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1348 // FIXME: generated code sucks.
1349 return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1350 DAG.getNode(ISD::ADD, dl, MVT::i32,
1351 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1352 DAG.getNode(ISD::FSUB, dl,
1353 MVT::ppcf128,
1354 N->getOperand(0),
1355 Tmp)),
1356 DAG.getConstant(0x80000000, MVT::i32)),
1357 DAG.getNode(ISD::FP_TO_SINT, dl,
1358 MVT::i32, N->getOperand(0)),
1359 DAG.getCondCode(ISD::SETGE));
1360 }
1361
1362 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1363 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1364 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1365 }
1366
1367 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1368 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1369 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1370 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1371
1372 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1373 // against zero to select between true and false values.
1374 if (NewRHS.getNode() == 0) {
1375 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1376 CCCode = ISD::SETNE;
1377 }
1378
1379 // Update N to have the operands specified.
1380 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1381 N->getOperand(2), N->getOperand(3),
1382 DAG.getCondCode(CCCode)), 0);
1383 }
1384
1385 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1386 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1387 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1388 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1389
1390 // If ExpandSetCCOperands returned a scalar, use it.
1391 if (NewRHS.getNode() == 0) {
1392 assert(NewLHS.getValueType() == N->getValueType(0) &&
1393 "Unexpected setcc expansion!");
1394 return NewLHS;
1395 }
1396
1397 // Otherwise, update N to have the operands specified.
1398 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1399 DAG.getCondCode(CCCode)), 0);
1400 }
1401
1402 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1403 if (ISD::isNormalStore(N))
1404 return ExpandOp_NormalStore(N, OpNo);
1405
1406 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1407 assert(OpNo == 1 && "Can only expand the stored value so far");
1408 StoreSDNode *ST = cast<StoreSDNode>(N);
1409
1410 SDValue Chain = ST->getChain();
1411 SDValue Ptr = ST->getBasePtr();
1412
1413 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1414 ST->getValue().getValueType());
1415 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1416 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1417
1418 SDValue Lo, Hi;
1419 GetExpandedOp(ST->getValue(), Lo, Hi);
1420
1421 return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1422 ST->getPointerInfo(),
1423 ST->getMemoryVT(), ST->isVolatile(),
1424 ST->isNonTemporal(), ST->getAlignment());
1425 }
ZPU llvm backend wip