1 //===-------- LegalizeFloatTypes.cpp - Legalization of float types --------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
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.
20 //===----------------------------------------------------------------------===//
22 #include "LegalizeTypes.h"
23 #include "llvm/Support/ErrorHandling.h"
24 #include "llvm/Support/raw_ostream.h"
27 #define DEBUG_TYPE "legalize-types"
29 /// GetFPLibCall - Return the right libcall for the given floating point type.
30 static RTLIB::Libcall GetFPLibCall(EVT VT,
31 RTLIB::Libcall Call_F32,
32 RTLIB::Libcall Call_F64,
33 RTLIB::Libcall Call_F80,
34 RTLIB::Libcall Call_F128,
35 RTLIB::Libcall Call_PPCF128) {
37 VT == MVT::f32 ? Call_F32 :
38 VT == MVT::f64 ? Call_F64 :
39 VT == MVT::f80 ? Call_F80 :
40 VT == MVT::f128 ? Call_F128 :
41 VT == MVT::ppcf128 ? Call_PPCF128 :
42 RTLIB::UNKNOWN_LIBCALL;
45 //===----------------------------------------------------------------------===//
46 // Result Float to Integer Conversion.
47 //===----------------------------------------------------------------------===//
49 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
50 DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
52 SDValue R = SDValue();
54 switch (N->getOpcode()) {
57 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
58 N->dump(&DAG); dbgs() << "\n";
60 llvm_unreachable("Do not know how to soften the result of this operator!");
62 case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
63 case ISD::BITCAST: R = SoftenFloatRes_BITCAST(N); break;
64 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
66 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
68 case ISD::EXTRACT_VECTOR_ELT:
69 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
70 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
71 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
72 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
73 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
74 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
75 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
76 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
77 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
78 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
79 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
80 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
81 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
82 case ISD::FMA: R = SoftenFloatRes_FMA(N); break;
83 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
84 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
85 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
86 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
87 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
88 case ISD::FP16_TO_FP: R = SoftenFloatRes_FP16_TO_FP(N); break;
89 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
90 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
91 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
92 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
93 case ISD::FROUND: R = SoftenFloatRes_FROUND(N); break;
94 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
95 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
96 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
97 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
98 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
99 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
100 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
101 case ISD::SINT_TO_FP:
102 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
103 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
104 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
107 // If R is null, the sub-method took care of registering the result.
109 SetSoftenedFloat(SDValue(N, ResNo), R);
112 SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
113 return BitConvertToInteger(N->getOperand(0));
116 SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
118 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
119 return BitConvertToInteger(Op);
122 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
123 // Convert the inputs to integers, and build a new pair out of them.
124 return DAG.getNode(ISD::BUILD_PAIR, SDLoc(N),
125 TLI.getTypeToTransformTo(*DAG.getContext(),
127 BitConvertToInteger(N->getOperand(0)),
128 BitConvertToInteger(N->getOperand(1)));
131 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
132 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
133 TLI.getTypeToTransformTo(*DAG.getContext(),
134 N->getValueType(0)));
137 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
138 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
139 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
140 NewOp.getValueType().getVectorElementType(),
141 NewOp, N->getOperand(1));
144 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
145 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
146 unsigned Size = NVT.getSizeInBits();
148 // Mask = ~(1 << (Size-1))
149 APInt API = APInt::getAllOnesValue(Size);
150 API.clearBit(Size-1);
151 SDValue Mask = DAG.getConstant(API, NVT);
152 SDValue Op = GetSoftenedFloat(N->getOperand(0));
153 return DAG.getNode(ISD::AND, SDLoc(N), NVT, Op, Mask);
156 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
157 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
158 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
159 GetSoftenedFloat(N->getOperand(1)) };
160 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
166 NVT, Ops, 2, false, SDLoc(N)).first;
169 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
170 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
171 SDValue Op = GetSoftenedFloat(N->getOperand(0));
172 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
177 RTLIB::CEIL_PPCF128),
178 NVT, &Op, 1, false, SDLoc(N)).first;
181 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
182 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
183 SDValue RHS = BitConvertToInteger(N->getOperand(1));
186 EVT LVT = LHS.getValueType();
187 EVT RVT = RHS.getValueType();
189 unsigned LSize = LVT.getSizeInBits();
190 unsigned RSize = RVT.getSizeInBits();
192 // First get the sign bit of second operand.
193 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
194 DAG.getConstant(RSize - 1,
195 TLI.getShiftAmountTy(RVT)));
196 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
198 // Shift right or sign-extend it if the two operands have different types.
199 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
201 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
202 DAG.getConstant(SizeDiff,
203 TLI.getShiftAmountTy(SignBit.getValueType())));
204 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
205 } else if (SizeDiff < 0) {
206 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
207 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
208 DAG.getConstant(-SizeDiff,
209 TLI.getShiftAmountTy(SignBit.getValueType())));
212 // Clear the sign bit of the first operand.
213 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
214 DAG.getConstant(LSize - 1,
215 TLI.getShiftAmountTy(LVT)));
216 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
217 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
219 // Or the value with the sign bit.
220 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
223 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
224 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
225 SDValue Op = GetSoftenedFloat(N->getOperand(0));
226 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
232 NVT, &Op, 1, false, SDLoc(N)).first;
235 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
236 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
237 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
238 GetSoftenedFloat(N->getOperand(1)) };
239 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
245 NVT, Ops, 2, false, SDLoc(N)).first;
248 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
249 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
250 SDValue Op = GetSoftenedFloat(N->getOperand(0));
251 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
257 NVT, &Op, 1, false, SDLoc(N)).first;
260 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
261 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
262 SDValue Op = GetSoftenedFloat(N->getOperand(0));
263 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
268 RTLIB::EXP2_PPCF128),
269 NVT, &Op, 1, false, SDLoc(N)).first;
272 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
273 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
274 SDValue Op = GetSoftenedFloat(N->getOperand(0));
275 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
280 RTLIB::FLOOR_PPCF128),
281 NVT, &Op, 1, false, SDLoc(N)).first;
284 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
285 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
286 SDValue Op = GetSoftenedFloat(N->getOperand(0));
287 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
293 NVT, &Op, 1, false, SDLoc(N)).first;
296 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
297 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
298 SDValue Op = GetSoftenedFloat(N->getOperand(0));
299 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
304 RTLIB::LOG2_PPCF128),
305 NVT, &Op, 1, false, SDLoc(N)).first;
308 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
309 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
310 SDValue Op = GetSoftenedFloat(N->getOperand(0));
311 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
316 RTLIB::LOG10_PPCF128),
317 NVT, &Op, 1, false, SDLoc(N)).first;
320 SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
321 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
322 SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
323 GetSoftenedFloat(N->getOperand(1)),
324 GetSoftenedFloat(N->getOperand(2)) };
325 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
331 NVT, Ops, 3, false, SDLoc(N)).first;
334 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
335 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
336 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
337 GetSoftenedFloat(N->getOperand(1)) };
338 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
344 NVT, Ops, 2, false, SDLoc(N)).first;
347 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
348 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
349 SDValue Op = GetSoftenedFloat(N->getOperand(0));
350 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
351 RTLIB::NEARBYINT_F32,
352 RTLIB::NEARBYINT_F64,
353 RTLIB::NEARBYINT_F80,
354 RTLIB::NEARBYINT_F128,
355 RTLIB::NEARBYINT_PPCF128),
356 NVT, &Op, 1, false, SDLoc(N)).first;
359 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
360 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
361 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
362 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
363 GetSoftenedFloat(N->getOperand(0)) };
364 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
370 NVT, Ops, 2, false, SDLoc(N)).first;
373 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
374 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
375 SDValue Op = N->getOperand(0);
376 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
377 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
378 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
381 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
383 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP(SDNode *N) {
384 EVT MidVT = TLI.getTypeToTransformTo(*DAG.getContext(), MVT::f32);
385 SDValue Op = N->getOperand(0);
386 SDValue Res32 = TLI.makeLibCall(DAG, RTLIB::FPEXT_F16_F32, MidVT, &Op, 1,
387 false, SDLoc(N)).first;
388 if (N->getValueType(0) == MVT::f32)
391 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
392 RTLIB::Libcall LC = RTLIB::getFPEXT(MVT::f32, N->getValueType(0));
393 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
394 return TLI.makeLibCall(DAG, LC, NVT, &Res32, 1, false, SDLoc(N)).first;
397 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
398 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
399 SDValue Op = N->getOperand(0);
400 if (N->getValueType(0) == MVT::f16) {
401 // Semi-soften first, to FP_TO_FP16, so that targets which support f16 as a
402 // storage-only type get a chance to select things.
403 return DAG.getNode(ISD::FP_TO_FP16, SDLoc(N), NVT, Op);
406 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
407 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
408 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
411 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
412 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
413 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
414 GetSoftenedFloat(N->getOperand(1)) };
415 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
421 NVT, Ops, 2, false, SDLoc(N)).first;
424 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
425 assert(N->getOperand(1).getValueType() == MVT::i32 &&
426 "Unsupported power type!");
427 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
428 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
429 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
434 RTLIB::POWI_PPCF128),
435 NVT, Ops, 2, false, SDLoc(N)).first;
438 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
439 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
440 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
441 GetSoftenedFloat(N->getOperand(1)) };
442 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
448 NVT, Ops, 2, false, SDLoc(N)).first;
451 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
452 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
453 SDValue Op = GetSoftenedFloat(N->getOperand(0));
454 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
459 RTLIB::RINT_PPCF128),
460 NVT, &Op, 1, false, SDLoc(N)).first;
463 SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
464 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
465 SDValue Op = GetSoftenedFloat(N->getOperand(0));
466 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
471 RTLIB::ROUND_PPCF128),
472 NVT, &Op, 1, false, SDLoc(N)).first;
475 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
476 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
477 SDValue Op = GetSoftenedFloat(N->getOperand(0));
478 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
484 NVT, &Op, 1, false, SDLoc(N)).first;
487 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
488 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
489 SDValue Op = GetSoftenedFloat(N->getOperand(0));
490 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
495 RTLIB::SQRT_PPCF128),
496 NVT, &Op, 1, false, SDLoc(N)).first;
499 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
500 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
501 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
502 GetSoftenedFloat(N->getOperand(1)) };
503 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
509 NVT, Ops, 2, false, SDLoc(N)).first;
512 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
513 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
514 SDValue Op = GetSoftenedFloat(N->getOperand(0));
515 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
520 RTLIB::TRUNC_PPCF128),
521 NVT, &Op, 1, false, SDLoc(N)).first;
524 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
525 LoadSDNode *L = cast<LoadSDNode>(N);
526 EVT VT = N->getValueType(0);
527 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
531 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
532 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
533 NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
534 L->getPointerInfo(), NVT, L->isVolatile(),
535 L->isNonTemporal(), false, L->getAlignment(),
537 // Legalized the chain result - switch anything that used the old chain to
539 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
543 // Do a non-extending load followed by FP_EXTEND.
544 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
545 L->getMemoryVT(), dl, L->getChain(),
546 L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
547 L->getMemoryVT(), L->isVolatile(),
548 L->isNonTemporal(), false, L->getAlignment(),
550 // Legalized the chain result - switch anything that used the old chain to
552 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
553 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
556 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
557 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
558 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
559 return DAG.getSelect(SDLoc(N),
560 LHS.getValueType(), N->getOperand(0), LHS, RHS);
563 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
564 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
565 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
566 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
567 LHS.getValueType(), N->getOperand(0),
568 N->getOperand(1), LHS, RHS, N->getOperand(4));
571 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
572 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
573 N->getValueType(0)));
576 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
577 SDValue Chain = N->getOperand(0); // Get the chain.
578 SDValue Ptr = N->getOperand(1); // Get the pointer.
579 EVT VT = N->getValueType(0);
580 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
584 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
585 N->getConstantOperandVal(3));
587 // Legalized the chain result - switch anything that used the old chain to
589 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
593 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
594 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
595 EVT SVT = N->getOperand(0).getValueType();
596 EVT RVT = N->getValueType(0);
600 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
601 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
602 // match. Look for an appropriate libcall.
603 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
604 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
605 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
606 NVT = (MVT::SimpleValueType)t;
607 // The source needs to big enough to hold the operand.
609 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
611 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
613 // Sign/zero extend the argument if the libcall takes a larger type.
614 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
615 NVT, N->getOperand(0));
616 return TLI.makeLibCall(DAG, LC,
617 TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
618 &Op, 1, false, dl).first;
622 //===----------------------------------------------------------------------===//
623 // Operand Float to Integer Conversion..
624 //===----------------------------------------------------------------------===//
626 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
627 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
629 SDValue Res = SDValue();
631 switch (N->getOpcode()) {
634 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
635 N->dump(&DAG); dbgs() << "\n";
637 llvm_unreachable("Do not know how to soften this operator's operand!");
639 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
640 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
641 case ISD::FP_EXTEND: Res = SoftenFloatOp_FP_EXTEND(N); break;
642 case ISD::FP_TO_FP16: // Same as FP_ROUND for softening purposes
643 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
644 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
645 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
646 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
647 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
648 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
651 // If the result is null, the sub-method took care of registering results etc.
652 if (!Res.getNode()) return false;
654 // If the result is N, the sub-method updated N in place. Tell the legalizer
656 if (Res.getNode() == N)
659 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
660 "Invalid operand expansion");
662 ReplaceValueWith(SDValue(N, 0), Res);
666 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
667 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
668 GetSoftenedFloat(N->getOperand(0)));
671 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_EXTEND(SDNode *N) {
672 // If we get here, the result must be legal but the source illegal.
673 EVT SVT = N->getOperand(0).getValueType();
674 EVT RVT = N->getValueType(0);
675 SDValue Op = GetSoftenedFloat(N->getOperand(0));
678 return DAG.getNode(ISD::FP16_TO_FP, SDLoc(N), RVT, Op);
680 RTLIB::Libcall LC = RTLIB::getFPEXT(SVT, RVT);
681 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND libcall");
683 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
687 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
688 // We actually deal with the partially-softened FP_TO_FP16 node too, which
689 // returns an i16 so doesn't meet the constraints necessary for FP_ROUND.
690 assert(N->getOpcode() == ISD::FP_ROUND || N->getOpcode() == ISD::FP_TO_FP16);
692 EVT SVT = N->getOperand(0).getValueType();
693 EVT RVT = N->getValueType(0);
694 EVT FloatRVT = N->getOpcode() == ISD::FP_TO_FP16 ? MVT::f16 : RVT;
696 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, FloatRVT);
697 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
699 SDValue Op = GetSoftenedFloat(N->getOperand(0));
700 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
703 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
704 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
705 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
707 EVT VT = NewLHS.getValueType();
708 NewLHS = GetSoftenedFloat(NewLHS);
709 NewRHS = GetSoftenedFloat(NewRHS);
710 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
712 // If softenSetCCOperands returned a scalar, we need to compare the result
713 // against zero to select between true and false values.
714 if (!NewRHS.getNode()) {
715 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
719 // Update N to have the operands specified.
720 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
721 DAG.getCondCode(CCCode), NewLHS, NewRHS,
726 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
727 EVT RVT = N->getValueType(0);
728 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
729 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
730 SDValue Op = GetSoftenedFloat(N->getOperand(0));
731 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
734 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
735 EVT RVT = N->getValueType(0);
736 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
737 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
738 SDValue Op = GetSoftenedFloat(N->getOperand(0));
739 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
742 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
743 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
744 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
746 EVT VT = NewLHS.getValueType();
747 NewLHS = GetSoftenedFloat(NewLHS);
748 NewRHS = GetSoftenedFloat(NewRHS);
749 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
751 // If softenSetCCOperands returned a scalar, we need to compare the result
752 // against zero to select between true and false values.
753 if (!NewRHS.getNode()) {
754 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
758 // Update N to have the operands specified.
759 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
760 N->getOperand(2), N->getOperand(3),
761 DAG.getCondCode(CCCode)),
765 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
766 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
767 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
769 EVT VT = NewLHS.getValueType();
770 NewLHS = GetSoftenedFloat(NewLHS);
771 NewRHS = GetSoftenedFloat(NewRHS);
772 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
774 // If softenSetCCOperands returned a scalar, use it.
775 if (!NewRHS.getNode()) {
776 assert(NewLHS.getValueType() == N->getValueType(0) &&
777 "Unexpected setcc expansion!");
781 // Otherwise, update N to have the operands specified.
782 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
783 DAG.getCondCode(CCCode)),
787 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
788 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
789 assert(OpNo == 1 && "Can only soften the stored value!");
790 StoreSDNode *ST = cast<StoreSDNode>(N);
791 SDValue Val = ST->getValue();
794 if (ST->isTruncatingStore())
795 // Do an FP_ROUND followed by a non-truncating store.
796 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
797 Val, DAG.getIntPtrConstant(0)));
799 Val = GetSoftenedFloat(Val);
801 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
802 ST->getMemOperand());
806 //===----------------------------------------------------------------------===//
807 // Float Result Expansion
808 //===----------------------------------------------------------------------===//
810 /// ExpandFloatResult - This method is called when the specified result of the
811 /// specified node is found to need expansion. At this point, the node may also
812 /// have invalid operands or may have other results that need promotion, we just
813 /// know that (at least) one result needs expansion.
814 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
815 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
819 // See if the target wants to custom expand this node.
820 if (CustomLowerNode(N, N->getValueType(ResNo), true))
823 switch (N->getOpcode()) {
826 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
827 N->dump(&DAG); dbgs() << "\n";
829 llvm_unreachable("Do not know how to expand the result of this operator!");
831 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
832 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
833 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
835 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
836 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
837 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
838 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
839 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
840 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
842 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
843 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
844 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
845 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
846 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
847 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
848 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
849 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
850 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
851 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
852 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
853 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
854 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
855 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
856 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
857 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
858 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
859 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
860 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
861 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
862 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
863 case ISD::FROUND: ExpandFloatRes_FROUND(N, Lo, Hi); break;
864 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
865 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
866 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
867 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
868 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
869 case ISD::SINT_TO_FP:
870 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
871 case ISD::FREM: ExpandFloatRes_FREM(N, Lo, Hi); break;
874 // If Lo/Hi is null, the sub-method took care of registering results etc.
876 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
879 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
881 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
882 assert(NVT.getSizeInBits() == integerPartWidth &&
883 "Do not know how to expand this float constant!");
884 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
885 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
886 APInt(integerPartWidth, C.getRawData()[1])),
888 Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
889 APInt(integerPartWidth, C.getRawData()[0])),
893 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
895 assert(N->getValueType(0) == MVT::ppcf128 &&
896 "Logic only correct for ppcf128!");
899 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
900 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
901 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
902 Lo = DAG.getSelectCC(dl, Tmp, Hi, Lo,
903 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
907 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
909 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
910 RTLIB::ADD_F32, RTLIB::ADD_F64,
911 RTLIB::ADD_F80, RTLIB::ADD_F128,
914 GetPairElements(Call, Lo, Hi);
917 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
918 SDValue &Lo, SDValue &Hi) {
919 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
920 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
921 RTLIB::CEIL_F80, RTLIB::CEIL_F128,
922 RTLIB::CEIL_PPCF128),
924 GetPairElements(Call, Lo, Hi);
927 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
928 SDValue &Lo, SDValue &Hi) {
929 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
933 RTLIB::COPYSIGN_F128,
934 RTLIB::COPYSIGN_PPCF128),
936 GetPairElements(Call, Lo, Hi);
939 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
940 SDValue &Lo, SDValue &Hi) {
941 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
942 RTLIB::COS_F32, RTLIB::COS_F64,
943 RTLIB::COS_F80, RTLIB::COS_F128,
946 GetPairElements(Call, Lo, Hi);
949 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
951 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
952 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
958 N->getValueType(0), Ops, 2, false,
960 GetPairElements(Call, Lo, Hi);
963 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
964 SDValue &Lo, SDValue &Hi) {
965 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
966 RTLIB::EXP_F32, RTLIB::EXP_F64,
967 RTLIB::EXP_F80, RTLIB::EXP_F128,
970 GetPairElements(Call, Lo, Hi);
973 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
974 SDValue &Lo, SDValue &Hi) {
975 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
976 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
977 RTLIB::EXP2_F80, RTLIB::EXP2_F128,
978 RTLIB::EXP2_PPCF128),
980 GetPairElements(Call, Lo, Hi);
983 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
984 SDValue &Lo, SDValue &Hi) {
985 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
986 RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
987 RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
988 RTLIB::FLOOR_PPCF128),
990 GetPairElements(Call, Lo, Hi);
993 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
994 SDValue &Lo, SDValue &Hi) {
995 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
996 RTLIB::LOG_F32, RTLIB::LOG_F64,
997 RTLIB::LOG_F80, RTLIB::LOG_F128,
1000 GetPairElements(Call, Lo, Hi);
1003 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
1004 SDValue &Lo, SDValue &Hi) {
1005 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1006 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
1007 RTLIB::LOG2_F80, RTLIB::LOG2_F128,
1008 RTLIB::LOG2_PPCF128),
1010 GetPairElements(Call, Lo, Hi);
1013 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
1014 SDValue &Lo, SDValue &Hi) {
1015 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1016 RTLIB::LOG10_F32, RTLIB::LOG10_F64,
1017 RTLIB::LOG10_F80, RTLIB::LOG10_F128,
1018 RTLIB::LOG10_PPCF128),
1020 GetPairElements(Call, Lo, Hi);
1023 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
1025 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
1026 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1031 RTLIB::FMA_PPCF128),
1032 N->getValueType(0), Ops, 3, false,
1034 GetPairElements(Call, Lo, Hi);
1037 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1039 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1040 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1045 RTLIB::MUL_PPCF128),
1046 N->getValueType(0), Ops, 2, false,
1048 GetPairElements(Call, Lo, Hi);
1051 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1052 SDValue &Lo, SDValue &Hi) {
1053 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1054 RTLIB::NEARBYINT_F32,
1055 RTLIB::NEARBYINT_F64,
1056 RTLIB::NEARBYINT_F80,
1057 RTLIB::NEARBYINT_F128,
1058 RTLIB::NEARBYINT_PPCF128),
1060 GetPairElements(Call, Lo, Hi);
1063 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1066 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1067 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1068 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1071 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1073 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1074 Hi = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), NVT, N->getOperand(0));
1075 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1076 APInt(NVT.getSizeInBits(), 0)), NVT);
1079 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1080 SDValue &Lo, SDValue &Hi) {
1081 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1082 RTLIB::POW_F32, RTLIB::POW_F64,
1083 RTLIB::POW_F80, RTLIB::POW_F128,
1084 RTLIB::POW_PPCF128),
1086 GetPairElements(Call, Lo, Hi);
1089 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1090 SDValue &Lo, SDValue &Hi) {
1091 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1092 RTLIB::POWI_F32, RTLIB::POWI_F64,
1093 RTLIB::POWI_F80, RTLIB::POWI_F128,
1094 RTLIB::POWI_PPCF128),
1096 GetPairElements(Call, Lo, Hi);
1099 void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1100 SDValue &Lo, SDValue &Hi) {
1101 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1102 RTLIB::REM_F32, RTLIB::REM_F64,
1103 RTLIB::REM_F80, RTLIB::REM_F128,
1104 RTLIB::REM_PPCF128),
1106 GetPairElements(Call, Lo, Hi);
1109 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1110 SDValue &Lo, SDValue &Hi) {
1111 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1112 RTLIB::RINT_F32, RTLIB::RINT_F64,
1113 RTLIB::RINT_F80, RTLIB::RINT_F128,
1114 RTLIB::RINT_PPCF128),
1116 GetPairElements(Call, Lo, Hi);
1119 void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1120 SDValue &Lo, SDValue &Hi) {
1121 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1126 RTLIB::ROUND_PPCF128),
1128 GetPairElements(Call, Lo, Hi);
1131 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1132 SDValue &Lo, SDValue &Hi) {
1133 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1134 RTLIB::SIN_F32, RTLIB::SIN_F64,
1135 RTLIB::SIN_F80, RTLIB::SIN_F128,
1136 RTLIB::SIN_PPCF128),
1138 GetPairElements(Call, Lo, Hi);
1141 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1142 SDValue &Lo, SDValue &Hi) {
1143 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1144 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1145 RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1146 RTLIB::SQRT_PPCF128),
1148 GetPairElements(Call, Lo, Hi);
1151 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1153 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1154 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1159 RTLIB::SUB_PPCF128),
1160 N->getValueType(0), Ops, 2, false,
1162 GetPairElements(Call, Lo, Hi);
1165 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1166 SDValue &Lo, SDValue &Hi) {
1167 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1168 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1169 RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1170 RTLIB::TRUNC_PPCF128),
1172 GetPairElements(Call, Lo, Hi);
1175 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1177 if (ISD::isNormalLoad(N)) {
1178 ExpandRes_NormalLoad(N, Lo, Hi);
1182 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1183 LoadSDNode *LD = cast<LoadSDNode>(N);
1184 SDValue Chain = LD->getChain();
1185 SDValue Ptr = LD->getBasePtr();
1188 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1189 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1190 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1192 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1193 LD->getMemoryVT(), LD->getMemOperand());
1195 // Remember the chain.
1196 Chain = Hi.getValue(1);
1198 // The low part is zero.
1199 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1200 APInt(NVT.getSizeInBits(), 0)), NVT);
1202 // Modified the chain - switch anything that used the old chain to use the
1204 ReplaceValueWith(SDValue(LD, 1), Chain);
1207 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1209 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1210 EVT VT = N->getValueType(0);
1211 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1212 SDValue Src = N->getOperand(0);
1213 EVT SrcVT = Src.getValueType();
1214 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1217 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1218 // When promoting partial word types to i32 we must honor the signedness,
1220 if (SrcVT.bitsLE(MVT::i32)) {
1221 // The integer can be represented exactly in an f64.
1222 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1224 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1225 APInt(NVT.getSizeInBits(), 0)), NVT);
1226 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1228 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1229 if (SrcVT.bitsLE(MVT::i64)) {
1230 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1232 LC = RTLIB::SINTTOFP_I64_PPCF128;
1233 } else if (SrcVT.bitsLE(MVT::i128)) {
1234 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1235 LC = RTLIB::SINTTOFP_I128_PPCF128;
1237 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1239 Hi = TLI.makeLibCall(DAG, LC, VT, &Src, 1, true, dl).first;
1240 GetPairElements(Hi, Lo, Hi);
1246 // Unsigned - fix up the SINT_TO_FP value just calculated.
1247 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1248 SrcVT = Src.getValueType();
1250 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1251 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1252 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1253 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1254 ArrayRef<uint64_t> Parts;
1256 switch (SrcVT.getSimpleVT().SimpleTy) {
1258 llvm_unreachable("Unsupported UINT_TO_FP!");
1270 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1271 DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble,
1274 Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, SrcVT),
1275 Lo, Hi, ISD::SETLT);
1276 GetPairElements(Lo, Lo, Hi);
1280 //===----------------------------------------------------------------------===//
1281 // Float Operand Expansion
1282 //===----------------------------------------------------------------------===//
1284 /// ExpandFloatOperand - This method is called when the specified operand of the
1285 /// specified node is found to need expansion. At this point, all of the result
1286 /// types of the node are known to be legal, but other operands of the node may
1287 /// need promotion or expansion as well as the specified one.
1288 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1289 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1290 SDValue Res = SDValue();
1292 // See if the target wants to custom expand this node.
1293 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1296 switch (N->getOpcode()) {
1299 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1300 N->dump(&DAG); dbgs() << "\n";
1302 llvm_unreachable("Do not know how to expand this operator's operand!");
1304 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1305 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1306 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1308 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1309 case ISD::FCOPYSIGN: Res = ExpandFloatOp_FCOPYSIGN(N); break;
1310 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1311 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1312 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1313 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1314 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1315 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1319 // If the result is null, the sub-method took care of registering results etc.
1320 if (!Res.getNode()) return false;
1322 // If the result is N, the sub-method updated N in place. Tell the legalizer
1324 if (Res.getNode() == N)
1327 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1328 "Invalid operand expansion");
1330 ReplaceValueWith(SDValue(N, 0), Res);
1334 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1335 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1336 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1338 ISD::CondCode &CCCode,
1340 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1341 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1342 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1344 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1346 // FIXME: This generated code sucks. We want to generate
1347 // FCMPU crN, hi1, hi2
1349 // FCMPU crN, lo1, lo2
1350 // The following can be improved, but not that much.
1351 SDValue Tmp1, Tmp2, Tmp3;
1352 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1353 LHSHi, RHSHi, ISD::SETOEQ);
1354 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1355 LHSLo, RHSLo, CCCode);
1356 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1357 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1358 LHSHi, RHSHi, ISD::SETUNE);
1359 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1360 LHSHi, RHSHi, CCCode);
1361 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1362 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1363 NewRHS = SDValue(); // LHS is the result, not a compare.
1366 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1367 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1368 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1369 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1371 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1372 // against zero to select between true and false values.
1373 if (!NewRHS.getNode()) {
1374 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1375 CCCode = ISD::SETNE;
1378 // Update N to have the operands specified.
1379 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1380 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1381 N->getOperand(4)), 0);
1384 SDValue DAGTypeLegalizer::ExpandFloatOp_FCOPYSIGN(SDNode *N) {
1385 assert(N->getOperand(1).getValueType() == MVT::ppcf128 &&
1386 "Logic only correct for ppcf128!");
1388 GetExpandedFloat(N->getOperand(1), Lo, Hi);
1389 // The ppcf128 value is providing only the sign; take it from the
1390 // higher-order double (which must have the larger magnitude).
1391 return DAG.getNode(ISD::FCOPYSIGN, SDLoc(N),
1392 N->getValueType(0), N->getOperand(0), Hi);
1395 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1396 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1397 "Logic only correct for ppcf128!");
1399 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1400 // Round it the rest of the way (e.g. to f32) if needed.
1401 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1402 N->getValueType(0), Hi, N->getOperand(1));
1405 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1406 EVT RVT = N->getValueType(0);
1409 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1410 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1411 if (RVT == MVT::i32) {
1412 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1413 "Logic only correct for ppcf128!");
1414 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1415 N->getOperand(0), DAG.getValueType(MVT::f64));
1416 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1417 DAG.getIntPtrConstant(1));
1418 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1421 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1422 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1423 return TLI.makeLibCall(DAG, LC, RVT, &N->getOperand(0), 1, false, dl).first;
1426 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1427 EVT RVT = N->getValueType(0);
1430 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1431 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1432 if (RVT == MVT::i32) {
1433 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1434 "Logic only correct for ppcf128!");
1435 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1436 APFloat APF = APFloat(APFloat::PPCDoubleDouble, APInt(128, TwoE31));
1437 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1438 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1439 // FIXME: generated code sucks.
1440 return DAG.getSelectCC(dl, N->getOperand(0), Tmp,
1441 DAG.getNode(ISD::ADD, dl, MVT::i32,
1442 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1443 DAG.getNode(ISD::FSUB, dl,
1447 DAG.getConstant(0x80000000, MVT::i32)),
1448 DAG.getNode(ISD::FP_TO_SINT, dl,
1449 MVT::i32, N->getOperand(0)),
1453 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1454 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1455 return TLI.makeLibCall(DAG, LC, N->getValueType(0), &N->getOperand(0), 1,
1459 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1460 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1461 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1462 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1464 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1465 // against zero to select between true and false values.
1466 if (!NewRHS.getNode()) {
1467 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1468 CCCode = ISD::SETNE;
1471 // Update N to have the operands specified.
1472 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1473 N->getOperand(2), N->getOperand(3),
1474 DAG.getCondCode(CCCode)), 0);
1477 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1478 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1479 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1480 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1482 // If ExpandSetCCOperands returned a scalar, use it.
1483 if (!NewRHS.getNode()) {
1484 assert(NewLHS.getValueType() == N->getValueType(0) &&
1485 "Unexpected setcc expansion!");
1489 // Otherwise, update N to have the operands specified.
1490 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1491 DAG.getCondCode(CCCode)), 0);
1494 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1495 if (ISD::isNormalStore(N))
1496 return ExpandOp_NormalStore(N, OpNo);
1498 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1499 assert(OpNo == 1 && "Can only expand the stored value so far");
1500 StoreSDNode *ST = cast<StoreSDNode>(N);
1502 SDValue Chain = ST->getChain();
1503 SDValue Ptr = ST->getBasePtr();
1505 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1506 ST->getValue().getValueType());
1507 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1508 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1512 GetExpandedOp(ST->getValue(), Lo, Hi);
1514 return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1515 ST->getMemoryVT(), ST->getMemOperand());