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 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
401 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
402 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N)).first;
405 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
406 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
407 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
408 GetSoftenedFloat(N->getOperand(1)) };
409 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
415 NVT, Ops, 2, false, SDLoc(N)).first;
418 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
419 assert(N->getOperand(1).getValueType() == MVT::i32 &&
420 "Unsupported power type!");
421 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
422 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
423 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
428 RTLIB::POWI_PPCF128),
429 NVT, Ops, 2, false, SDLoc(N)).first;
432 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
433 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
434 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
435 GetSoftenedFloat(N->getOperand(1)) };
436 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
442 NVT, Ops, 2, false, SDLoc(N)).first;
445 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
446 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
447 SDValue Op = GetSoftenedFloat(N->getOperand(0));
448 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
453 RTLIB::RINT_PPCF128),
454 NVT, &Op, 1, false, SDLoc(N)).first;
457 SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
458 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
459 SDValue Op = GetSoftenedFloat(N->getOperand(0));
460 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
465 RTLIB::ROUND_PPCF128),
466 NVT, &Op, 1, false, SDLoc(N)).first;
469 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
470 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
471 SDValue Op = GetSoftenedFloat(N->getOperand(0));
472 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
478 NVT, &Op, 1, false, SDLoc(N)).first;
481 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
482 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
483 SDValue Op = GetSoftenedFloat(N->getOperand(0));
484 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
489 RTLIB::SQRT_PPCF128),
490 NVT, &Op, 1, false, SDLoc(N)).first;
493 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
494 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
495 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
496 GetSoftenedFloat(N->getOperand(1)) };
497 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
503 NVT, Ops, 2, false, SDLoc(N)).first;
506 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
507 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
508 SDValue Op = GetSoftenedFloat(N->getOperand(0));
509 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
514 RTLIB::TRUNC_PPCF128),
515 NVT, &Op, 1, false, SDLoc(N)).first;
518 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
519 LoadSDNode *L = cast<LoadSDNode>(N);
520 EVT VT = N->getValueType(0);
521 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
525 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
526 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
527 NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
528 L->getPointerInfo(), NVT, L->isVolatile(),
529 L->isNonTemporal(), false, L->getAlignment(),
531 // Legalized the chain result - switch anything that used the old chain to
533 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
537 // Do a non-extending load followed by FP_EXTEND.
538 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
539 L->getMemoryVT(), dl, L->getChain(),
540 L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
541 L->getMemoryVT(), L->isVolatile(),
542 L->isNonTemporal(), false, L->getAlignment(),
544 // Legalized the chain result - switch anything that used the old chain to
546 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
547 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
550 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
551 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
552 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
553 return DAG.getSelect(SDLoc(N),
554 LHS.getValueType(), N->getOperand(0), LHS, RHS);
557 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
558 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
559 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
560 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
561 LHS.getValueType(), N->getOperand(0),
562 N->getOperand(1), LHS, RHS, N->getOperand(4));
565 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
566 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
567 N->getValueType(0)));
570 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
571 SDValue Chain = N->getOperand(0); // Get the chain.
572 SDValue Ptr = N->getOperand(1); // Get the pointer.
573 EVT VT = N->getValueType(0);
574 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
578 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
579 N->getConstantOperandVal(3));
581 // Legalized the chain result - switch anything that used the old chain to
583 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
587 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
588 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
589 EVT SVT = N->getOperand(0).getValueType();
590 EVT RVT = N->getValueType(0);
594 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
595 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
596 // match. Look for an appropriate libcall.
597 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
598 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
599 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
600 NVT = (MVT::SimpleValueType)t;
601 // The source needs to big enough to hold the operand.
603 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
605 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
607 // Sign/zero extend the argument if the libcall takes a larger type.
608 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
609 NVT, N->getOperand(0));
610 return TLI.makeLibCall(DAG, LC,
611 TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
612 &Op, 1, false, dl).first;
616 //===----------------------------------------------------------------------===//
617 // Operand Float to Integer Conversion..
618 //===----------------------------------------------------------------------===//
620 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
621 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
623 SDValue Res = SDValue();
625 switch (N->getOpcode()) {
628 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
629 N->dump(&DAG); dbgs() << "\n";
631 llvm_unreachable("Do not know how to soften this operator's operand!");
633 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
634 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
635 case ISD::FP_TO_FP16: // Same as FP_ROUND for softening purposes
636 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
637 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
638 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
639 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
640 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
641 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
644 // If the result is null, the sub-method took care of registering results etc.
645 if (!Res.getNode()) return false;
647 // If the result is N, the sub-method updated N in place. Tell the legalizer
649 if (Res.getNode() == N)
652 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
653 "Invalid operand expansion");
655 ReplaceValueWith(SDValue(N, 0), Res);
659 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
660 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
661 GetSoftenedFloat(N->getOperand(0)));
664 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
665 // We actually deal with the partially-softened FP_TO_FP16 node too, which
666 // returns an i16 so doesn't meet the constraints necessary for FP_ROUND.
667 assert(N->getOpcode() == ISD::FP_ROUND || N->getOpcode() == ISD::FP_TO_FP16);
669 EVT SVT = N->getOperand(0).getValueType();
670 EVT RVT = N->getValueType(0);
671 EVT FloatRVT = N->getOpcode() == ISD::FP_TO_FP16 ? MVT::f16 : RVT;
673 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, FloatRVT);
674 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
676 SDValue Op = GetSoftenedFloat(N->getOperand(0));
677 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
680 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
681 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
682 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
684 EVT VT = NewLHS.getValueType();
685 NewLHS = GetSoftenedFloat(NewLHS);
686 NewRHS = GetSoftenedFloat(NewRHS);
687 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
689 // If softenSetCCOperands returned a scalar, we need to compare the result
690 // against zero to select between true and false values.
691 if (!NewRHS.getNode()) {
692 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
696 // Update N to have the operands specified.
697 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
698 DAG.getCondCode(CCCode), NewLHS, NewRHS,
703 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
704 EVT RVT = N->getValueType(0);
705 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
706 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
707 SDValue Op = GetSoftenedFloat(N->getOperand(0));
708 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
711 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
712 EVT RVT = N->getValueType(0);
713 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
714 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
715 SDValue Op = GetSoftenedFloat(N->getOperand(0));
716 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N)).first;
719 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
720 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
721 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
723 EVT VT = NewLHS.getValueType();
724 NewLHS = GetSoftenedFloat(NewLHS);
725 NewRHS = GetSoftenedFloat(NewRHS);
726 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
728 // If softenSetCCOperands returned a scalar, we need to compare the result
729 // against zero to select between true and false values.
730 if (!NewRHS.getNode()) {
731 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
735 // Update N to have the operands specified.
736 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
737 N->getOperand(2), N->getOperand(3),
738 DAG.getCondCode(CCCode)),
742 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
743 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
744 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->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, use it.
752 if (!NewRHS.getNode()) {
753 assert(NewLHS.getValueType() == N->getValueType(0) &&
754 "Unexpected setcc expansion!");
758 // Otherwise, update N to have the operands specified.
759 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
760 DAG.getCondCode(CCCode)),
764 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
765 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
766 assert(OpNo == 1 && "Can only soften the stored value!");
767 StoreSDNode *ST = cast<StoreSDNode>(N);
768 SDValue Val = ST->getValue();
771 if (ST->isTruncatingStore())
772 // Do an FP_ROUND followed by a non-truncating store.
773 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
774 Val, DAG.getIntPtrConstant(0)));
776 Val = GetSoftenedFloat(Val);
778 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
779 ST->getMemOperand());
783 //===----------------------------------------------------------------------===//
784 // Float Result Expansion
785 //===----------------------------------------------------------------------===//
787 /// ExpandFloatResult - This method is called when the specified result of the
788 /// specified node is found to need expansion. At this point, the node may also
789 /// have invalid operands or may have other results that need promotion, we just
790 /// know that (at least) one result needs expansion.
791 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
792 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
796 // See if the target wants to custom expand this node.
797 if (CustomLowerNode(N, N->getValueType(ResNo), true))
800 switch (N->getOpcode()) {
803 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
804 N->dump(&DAG); dbgs() << "\n";
806 llvm_unreachable("Do not know how to expand the result of this operator!");
808 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
809 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
810 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
812 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
813 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
814 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
815 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
816 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
817 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
819 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
820 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
821 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
822 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
823 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
824 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
825 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
826 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
827 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
828 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
829 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
830 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
831 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
832 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
833 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
834 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
835 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
836 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
837 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
838 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
839 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
840 case ISD::FROUND: ExpandFloatRes_FROUND(N, Lo, Hi); break;
841 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
842 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
843 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
844 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
845 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
846 case ISD::SINT_TO_FP:
847 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
848 case ISD::FREM: ExpandFloatRes_FREM(N, Lo, Hi); break;
851 // If Lo/Hi is null, the sub-method took care of registering results etc.
853 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
856 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
858 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
859 assert(NVT.getSizeInBits() == integerPartWidth &&
860 "Do not know how to expand this float constant!");
861 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
862 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
863 APInt(integerPartWidth, C.getRawData()[1])),
865 Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
866 APInt(integerPartWidth, C.getRawData()[0])),
870 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
872 assert(N->getValueType(0) == MVT::ppcf128 &&
873 "Logic only correct for ppcf128!");
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.getSelectCC(dl, Tmp, Hi, Lo,
880 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
884 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
886 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
887 RTLIB::ADD_F32, RTLIB::ADD_F64,
888 RTLIB::ADD_F80, RTLIB::ADD_F128,
891 GetPairElements(Call, Lo, Hi);
894 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
895 SDValue &Lo, SDValue &Hi) {
896 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
897 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
898 RTLIB::CEIL_F80, RTLIB::CEIL_F128,
899 RTLIB::CEIL_PPCF128),
901 GetPairElements(Call, Lo, Hi);
904 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
905 SDValue &Lo, SDValue &Hi) {
906 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
910 RTLIB::COPYSIGN_F128,
911 RTLIB::COPYSIGN_PPCF128),
913 GetPairElements(Call, Lo, Hi);
916 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
917 SDValue &Lo, SDValue &Hi) {
918 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
919 RTLIB::COS_F32, RTLIB::COS_F64,
920 RTLIB::COS_F80, RTLIB::COS_F128,
923 GetPairElements(Call, Lo, Hi);
926 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
928 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
929 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
935 N->getValueType(0), Ops, 2, false,
937 GetPairElements(Call, Lo, Hi);
940 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
941 SDValue &Lo, SDValue &Hi) {
942 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
943 RTLIB::EXP_F32, RTLIB::EXP_F64,
944 RTLIB::EXP_F80, RTLIB::EXP_F128,
947 GetPairElements(Call, Lo, Hi);
950 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
951 SDValue &Lo, SDValue &Hi) {
952 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
953 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
954 RTLIB::EXP2_F80, RTLIB::EXP2_F128,
955 RTLIB::EXP2_PPCF128),
957 GetPairElements(Call, Lo, Hi);
960 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
961 SDValue &Lo, SDValue &Hi) {
962 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
963 RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
964 RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
965 RTLIB::FLOOR_PPCF128),
967 GetPairElements(Call, Lo, Hi);
970 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
971 SDValue &Lo, SDValue &Hi) {
972 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
973 RTLIB::LOG_F32, RTLIB::LOG_F64,
974 RTLIB::LOG_F80, RTLIB::LOG_F128,
977 GetPairElements(Call, Lo, Hi);
980 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
981 SDValue &Lo, SDValue &Hi) {
982 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
983 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
984 RTLIB::LOG2_F80, RTLIB::LOG2_F128,
985 RTLIB::LOG2_PPCF128),
987 GetPairElements(Call, Lo, Hi);
990 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
991 SDValue &Lo, SDValue &Hi) {
992 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
993 RTLIB::LOG10_F32, RTLIB::LOG10_F64,
994 RTLIB::LOG10_F80, RTLIB::LOG10_F128,
995 RTLIB::LOG10_PPCF128),
997 GetPairElements(Call, Lo, Hi);
1000 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
1002 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
1003 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1008 RTLIB::FMA_PPCF128),
1009 N->getValueType(0), Ops, 3, false,
1011 GetPairElements(Call, Lo, Hi);
1014 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1016 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1017 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1022 RTLIB::MUL_PPCF128),
1023 N->getValueType(0), Ops, 2, false,
1025 GetPairElements(Call, Lo, Hi);
1028 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1029 SDValue &Lo, SDValue &Hi) {
1030 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1031 RTLIB::NEARBYINT_F32,
1032 RTLIB::NEARBYINT_F64,
1033 RTLIB::NEARBYINT_F80,
1034 RTLIB::NEARBYINT_F128,
1035 RTLIB::NEARBYINT_PPCF128),
1037 GetPairElements(Call, Lo, Hi);
1040 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1043 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1044 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1045 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1048 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1050 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1051 Hi = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), NVT, N->getOperand(0));
1052 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1053 APInt(NVT.getSizeInBits(), 0)), NVT);
1056 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1057 SDValue &Lo, SDValue &Hi) {
1058 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1059 RTLIB::POW_F32, RTLIB::POW_F64,
1060 RTLIB::POW_F80, RTLIB::POW_F128,
1061 RTLIB::POW_PPCF128),
1063 GetPairElements(Call, Lo, Hi);
1066 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1067 SDValue &Lo, SDValue &Hi) {
1068 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1069 RTLIB::POWI_F32, RTLIB::POWI_F64,
1070 RTLIB::POWI_F80, RTLIB::POWI_F128,
1071 RTLIB::POWI_PPCF128),
1073 GetPairElements(Call, Lo, Hi);
1076 void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1077 SDValue &Lo, SDValue &Hi) {
1078 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1079 RTLIB::REM_F32, RTLIB::REM_F64,
1080 RTLIB::REM_F80, RTLIB::REM_F128,
1081 RTLIB::REM_PPCF128),
1083 GetPairElements(Call, Lo, Hi);
1086 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1087 SDValue &Lo, SDValue &Hi) {
1088 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1089 RTLIB::RINT_F32, RTLIB::RINT_F64,
1090 RTLIB::RINT_F80, RTLIB::RINT_F128,
1091 RTLIB::RINT_PPCF128),
1093 GetPairElements(Call, Lo, Hi);
1096 void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1097 SDValue &Lo, SDValue &Hi) {
1098 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1103 RTLIB::ROUND_PPCF128),
1105 GetPairElements(Call, Lo, Hi);
1108 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1109 SDValue &Lo, SDValue &Hi) {
1110 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1111 RTLIB::SIN_F32, RTLIB::SIN_F64,
1112 RTLIB::SIN_F80, RTLIB::SIN_F128,
1113 RTLIB::SIN_PPCF128),
1115 GetPairElements(Call, Lo, Hi);
1118 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1119 SDValue &Lo, SDValue &Hi) {
1120 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1121 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1122 RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1123 RTLIB::SQRT_PPCF128),
1125 GetPairElements(Call, Lo, Hi);
1128 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1130 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1131 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1136 RTLIB::SUB_PPCF128),
1137 N->getValueType(0), Ops, 2, false,
1139 GetPairElements(Call, Lo, Hi);
1142 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1143 SDValue &Lo, SDValue &Hi) {
1144 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1145 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1146 RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1147 RTLIB::TRUNC_PPCF128),
1149 GetPairElements(Call, Lo, Hi);
1152 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1154 if (ISD::isNormalLoad(N)) {
1155 ExpandRes_NormalLoad(N, Lo, Hi);
1159 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1160 LoadSDNode *LD = cast<LoadSDNode>(N);
1161 SDValue Chain = LD->getChain();
1162 SDValue Ptr = LD->getBasePtr();
1165 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1166 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1167 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1169 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1170 LD->getMemoryVT(), LD->getMemOperand());
1172 // Remember the chain.
1173 Chain = Hi.getValue(1);
1175 // The low part is zero.
1176 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1177 APInt(NVT.getSizeInBits(), 0)), NVT);
1179 // Modified the chain - switch anything that used the old chain to use the
1181 ReplaceValueWith(SDValue(LD, 1), Chain);
1184 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1186 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1187 EVT VT = N->getValueType(0);
1188 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1189 SDValue Src = N->getOperand(0);
1190 EVT SrcVT = Src.getValueType();
1191 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1194 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1195 // When promoting partial word types to i32 we must honor the signedness,
1197 if (SrcVT.bitsLE(MVT::i32)) {
1198 // The integer can be represented exactly in an f64.
1199 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1201 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1202 APInt(NVT.getSizeInBits(), 0)), NVT);
1203 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1205 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1206 if (SrcVT.bitsLE(MVT::i64)) {
1207 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1209 LC = RTLIB::SINTTOFP_I64_PPCF128;
1210 } else if (SrcVT.bitsLE(MVT::i128)) {
1211 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1212 LC = RTLIB::SINTTOFP_I128_PPCF128;
1214 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1216 Hi = TLI.makeLibCall(DAG, LC, VT, &Src, 1, true, dl).first;
1217 GetPairElements(Hi, Lo, Hi);
1223 // Unsigned - fix up the SINT_TO_FP value just calculated.
1224 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1225 SrcVT = Src.getValueType();
1227 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1228 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1229 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1230 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1231 ArrayRef<uint64_t> Parts;
1233 switch (SrcVT.getSimpleVT().SimpleTy) {
1235 llvm_unreachable("Unsupported UINT_TO_FP!");
1247 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1248 DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble,
1251 Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, SrcVT),
1252 Lo, Hi, ISD::SETLT);
1253 GetPairElements(Lo, Lo, Hi);
1257 //===----------------------------------------------------------------------===//
1258 // Float Operand Expansion
1259 //===----------------------------------------------------------------------===//
1261 /// ExpandFloatOperand - This method is called when the specified operand of the
1262 /// specified node is found to need expansion. At this point, all of the result
1263 /// types of the node are known to be legal, but other operands of the node may
1264 /// need promotion or expansion as well as the specified one.
1265 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1266 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1267 SDValue Res = SDValue();
1269 // See if the target wants to custom expand this node.
1270 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1273 switch (N->getOpcode()) {
1276 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1277 N->dump(&DAG); dbgs() << "\n";
1279 llvm_unreachable("Do not know how to expand this operator's operand!");
1281 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1282 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1283 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1285 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1286 case ISD::FCOPYSIGN: Res = ExpandFloatOp_FCOPYSIGN(N); break;
1287 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1288 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1289 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1290 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1291 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1292 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1296 // If the result is null, the sub-method took care of registering results etc.
1297 if (!Res.getNode()) return false;
1299 // If the result is N, the sub-method updated N in place. Tell the legalizer
1301 if (Res.getNode() == N)
1304 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1305 "Invalid operand expansion");
1307 ReplaceValueWith(SDValue(N, 0), Res);
1311 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1312 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1313 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1315 ISD::CondCode &CCCode,
1317 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1318 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1319 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1321 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1323 // FIXME: This generated code sucks. We want to generate
1324 // FCMPU crN, hi1, hi2
1326 // FCMPU crN, lo1, lo2
1327 // The following can be improved, but not that much.
1328 SDValue Tmp1, Tmp2, Tmp3;
1329 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1330 LHSHi, RHSHi, ISD::SETOEQ);
1331 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1332 LHSLo, RHSLo, CCCode);
1333 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1334 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1335 LHSHi, RHSHi, ISD::SETUNE);
1336 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1337 LHSHi, RHSHi, CCCode);
1338 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1339 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1340 NewRHS = SDValue(); // LHS is the result, not a compare.
1343 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1344 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1345 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1346 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1348 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1349 // against zero to select between true and false values.
1350 if (!NewRHS.getNode()) {
1351 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1352 CCCode = ISD::SETNE;
1355 // Update N to have the operands specified.
1356 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1357 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1358 N->getOperand(4)), 0);
1361 SDValue DAGTypeLegalizer::ExpandFloatOp_FCOPYSIGN(SDNode *N) {
1362 assert(N->getOperand(1).getValueType() == MVT::ppcf128 &&
1363 "Logic only correct for ppcf128!");
1365 GetExpandedFloat(N->getOperand(1), Lo, Hi);
1366 // The ppcf128 value is providing only the sign; take it from the
1367 // higher-order double (which must have the larger magnitude).
1368 return DAG.getNode(ISD::FCOPYSIGN, SDLoc(N),
1369 N->getValueType(0), N->getOperand(0), Hi);
1372 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1373 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1374 "Logic only correct for ppcf128!");
1376 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1377 // Round it the rest of the way (e.g. to f32) if needed.
1378 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1379 N->getValueType(0), Hi, N->getOperand(1));
1382 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1383 EVT RVT = N->getValueType(0);
1386 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1387 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1388 if (RVT == MVT::i32) {
1389 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1390 "Logic only correct for ppcf128!");
1391 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1392 N->getOperand(0), DAG.getValueType(MVT::f64));
1393 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1394 DAG.getIntPtrConstant(1));
1395 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1398 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1399 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1400 return TLI.makeLibCall(DAG, LC, RVT, &N->getOperand(0), 1, false, dl).first;
1403 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1404 EVT RVT = N->getValueType(0);
1407 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1408 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1409 if (RVT == MVT::i32) {
1410 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1411 "Logic only correct for ppcf128!");
1412 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1413 APFloat APF = APFloat(APFloat::PPCDoubleDouble, APInt(128, TwoE31));
1414 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1415 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1416 // FIXME: generated code sucks.
1417 return DAG.getSelectCC(dl, N->getOperand(0), Tmp,
1418 DAG.getNode(ISD::ADD, dl, MVT::i32,
1419 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1420 DAG.getNode(ISD::FSUB, dl,
1424 DAG.getConstant(0x80000000, MVT::i32)),
1425 DAG.getNode(ISD::FP_TO_SINT, dl,
1426 MVT::i32, N->getOperand(0)),
1430 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1431 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1432 return TLI.makeLibCall(DAG, LC, N->getValueType(0), &N->getOperand(0), 1,
1436 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1437 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1438 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1439 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1441 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1442 // against zero to select between true and false values.
1443 if (!NewRHS.getNode()) {
1444 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1445 CCCode = ISD::SETNE;
1448 // Update N to have the operands specified.
1449 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1450 N->getOperand(2), N->getOperand(3),
1451 DAG.getCondCode(CCCode)), 0);
1454 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1455 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1456 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1457 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1459 // If ExpandSetCCOperands returned a scalar, use it.
1460 if (!NewRHS.getNode()) {
1461 assert(NewLHS.getValueType() == N->getValueType(0) &&
1462 "Unexpected setcc expansion!");
1466 // Otherwise, update N to have the operands specified.
1467 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1468 DAG.getCondCode(CCCode)), 0);
1471 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1472 if (ISD::isNormalStore(N))
1473 return ExpandOp_NormalStore(N, OpNo);
1475 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1476 assert(OpNo == 1 && "Can only expand the stored value so far");
1477 StoreSDNode *ST = cast<StoreSDNode>(N);
1479 SDValue Chain = ST->getChain();
1480 SDValue Ptr = ST->getBasePtr();
1482 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1483 ST->getValue().getValueType());
1484 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1485 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1489 GetExpandedOp(ST->getValue(), Lo, Hi);
1491 return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1492 ST->getMemoryVT(), ST->getMemOperand());