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 /// GetFPLibCall - Return the right libcall for the given floating point type.
28 static RTLIB::Libcall GetFPLibCall(EVT VT,
29 RTLIB::Libcall Call_F32,
30 RTLIB::Libcall Call_F64,
31 RTLIB::Libcall Call_F80,
32 RTLIB::Libcall Call_F128,
33 RTLIB::Libcall Call_PPCF128) {
35 VT == MVT::f32 ? Call_F32 :
36 VT == MVT::f64 ? Call_F64 :
37 VT == MVT::f80 ? Call_F80 :
38 VT == MVT::f128 ? Call_F128 :
39 VT == MVT::ppcf128 ? Call_PPCF128 :
40 RTLIB::UNKNOWN_LIBCALL;
43 //===----------------------------------------------------------------------===//
44 // Result Float to Integer Conversion.
45 //===----------------------------------------------------------------------===//
47 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
48 DEBUG(dbgs() << "Soften float result " << ResNo << ": "; N->dump(&DAG);
50 SDValue R = SDValue();
52 switch (N->getOpcode()) {
55 dbgs() << "SoftenFloatResult #" << ResNo << ": ";
56 N->dump(&DAG); dbgs() << "\n";
58 llvm_unreachable("Do not know how to soften the result of this operator!");
60 case ISD::MERGE_VALUES:R = SoftenFloatRes_MERGE_VALUES(N, ResNo); break;
61 case ISD::BITCAST: R = SoftenFloatRes_BITCAST(N); break;
62 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
64 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
66 case ISD::EXTRACT_VECTOR_ELT:
67 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
68 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
69 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
70 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
71 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
72 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
73 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
74 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
75 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
76 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
77 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
78 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
79 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
80 case ISD::FMA: R = SoftenFloatRes_FMA(N); break;
81 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
82 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
83 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
84 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
85 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
86 case ISD::FP16_TO_FP32:R = SoftenFloatRes_FP16_TO_FP32(N); break;
87 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
88 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
89 case ISD::FREM: R = SoftenFloatRes_FREM(N); break;
90 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
91 case ISD::FROUND: R = SoftenFloatRes_FROUND(N); break;
92 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
93 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
94 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
95 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
96 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
97 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
98 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
100 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
101 case ISD::UNDEF: R = SoftenFloatRes_UNDEF(N); break;
102 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
105 // If R is null, the sub-method took care of registering the result.
107 SetSoftenedFloat(SDValue(N, ResNo), R);
110 SDValue DAGTypeLegalizer::SoftenFloatRes_BITCAST(SDNode *N) {
111 return BitConvertToInteger(N->getOperand(0));
114 SDValue DAGTypeLegalizer::SoftenFloatRes_MERGE_VALUES(SDNode *N,
116 SDValue Op = DisintegrateMERGE_VALUES(N, ResNo);
117 return BitConvertToInteger(Op);
120 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
121 // Convert the inputs to integers, and build a new pair out of them.
122 return DAG.getNode(ISD::BUILD_PAIR, SDLoc(N),
123 TLI.getTypeToTransformTo(*DAG.getContext(),
125 BitConvertToInteger(N->getOperand(0)),
126 BitConvertToInteger(N->getOperand(1)));
129 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
130 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
131 TLI.getTypeToTransformTo(*DAG.getContext(),
132 N->getValueType(0)));
135 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
136 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
137 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(N),
138 NewOp.getValueType().getVectorElementType(),
139 NewOp, N->getOperand(1));
142 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
143 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
144 unsigned Size = NVT.getSizeInBits();
146 // Mask = ~(1 << (Size-1))
147 APInt API = APInt::getAllOnesValue(Size);
148 API.clearBit(Size-1);
149 SDValue Mask = DAG.getConstant(API, NVT);
150 SDValue Op = GetSoftenedFloat(N->getOperand(0));
151 return DAG.getNode(ISD::AND, SDLoc(N), NVT, Op, Mask);
154 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
155 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
156 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
157 GetSoftenedFloat(N->getOperand(1)) };
158 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
164 NVT, Ops, 2, false, SDLoc(N));
167 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
168 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
169 SDValue Op = GetSoftenedFloat(N->getOperand(0));
170 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
175 RTLIB::CEIL_PPCF128),
176 NVT, &Op, 1, false, SDLoc(N));
179 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
180 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
181 SDValue RHS = BitConvertToInteger(N->getOperand(1));
184 EVT LVT = LHS.getValueType();
185 EVT RVT = RHS.getValueType();
187 unsigned LSize = LVT.getSizeInBits();
188 unsigned RSize = RVT.getSizeInBits();
190 // First get the sign bit of second operand.
191 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
192 DAG.getConstant(RSize - 1,
193 TLI.getShiftAmountTy(RVT)));
194 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
196 // Shift right or sign-extend it if the two operands have different types.
197 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
199 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
200 DAG.getConstant(SizeDiff,
201 TLI.getShiftAmountTy(SignBit.getValueType())));
202 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
203 } else if (SizeDiff < 0) {
204 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
205 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
206 DAG.getConstant(-SizeDiff,
207 TLI.getShiftAmountTy(SignBit.getValueType())));
210 // Clear the sign bit of the first operand.
211 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
212 DAG.getConstant(LSize - 1,
213 TLI.getShiftAmountTy(LVT)));
214 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
215 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
217 // Or the value with the sign bit.
218 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
221 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
222 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
223 SDValue Op = GetSoftenedFloat(N->getOperand(0));
224 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
230 NVT, &Op, 1, false, SDLoc(N));
233 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
234 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
235 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
236 GetSoftenedFloat(N->getOperand(1)) };
237 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
243 NVT, Ops, 2, false, SDLoc(N));
246 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
247 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
248 SDValue Op = GetSoftenedFloat(N->getOperand(0));
249 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
255 NVT, &Op, 1, false, SDLoc(N));
258 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
259 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
260 SDValue Op = GetSoftenedFloat(N->getOperand(0));
261 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
266 RTLIB::EXP2_PPCF128),
267 NVT, &Op, 1, false, SDLoc(N));
270 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
271 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
272 SDValue Op = GetSoftenedFloat(N->getOperand(0));
273 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
278 RTLIB::FLOOR_PPCF128),
279 NVT, &Op, 1, false, SDLoc(N));
282 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
283 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
284 SDValue Op = GetSoftenedFloat(N->getOperand(0));
285 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
291 NVT, &Op, 1, false, SDLoc(N));
294 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
295 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
296 SDValue Op = GetSoftenedFloat(N->getOperand(0));
297 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
302 RTLIB::LOG2_PPCF128),
303 NVT, &Op, 1, false, SDLoc(N));
306 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
307 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
308 SDValue Op = GetSoftenedFloat(N->getOperand(0));
309 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
314 RTLIB::LOG10_PPCF128),
315 NVT, &Op, 1, false, SDLoc(N));
318 SDValue DAGTypeLegalizer::SoftenFloatRes_FMA(SDNode *N) {
319 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
320 SDValue Ops[3] = { GetSoftenedFloat(N->getOperand(0)),
321 GetSoftenedFloat(N->getOperand(1)),
322 GetSoftenedFloat(N->getOperand(2)) };
323 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
329 NVT, Ops, 3, false, SDLoc(N));
332 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
333 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
334 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
335 GetSoftenedFloat(N->getOperand(1)) };
336 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
342 NVT, Ops, 2, false, SDLoc(N));
345 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
346 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
347 SDValue Op = GetSoftenedFloat(N->getOperand(0));
348 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
349 RTLIB::NEARBYINT_F32,
350 RTLIB::NEARBYINT_F64,
351 RTLIB::NEARBYINT_F80,
352 RTLIB::NEARBYINT_F128,
353 RTLIB::NEARBYINT_PPCF128),
354 NVT, &Op, 1, false, SDLoc(N));
357 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
358 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
359 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
360 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
361 GetSoftenedFloat(N->getOperand(0)) };
362 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
368 NVT, Ops, 2, false, SDLoc(N));
371 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
372 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
373 SDValue Op = N->getOperand(0);
374 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
375 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
376 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N));
379 // FIXME: Should we just use 'normal' FP_EXTEND / FP_TRUNC instead of special
381 SDValue DAGTypeLegalizer::SoftenFloatRes_FP16_TO_FP32(SDNode *N) {
382 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
383 SDValue Op = N->getOperand(0);
384 return TLI.makeLibCall(DAG, RTLIB::FPEXT_F16_F32, NVT, &Op, 1, false,
388 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
389 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
390 SDValue Op = N->getOperand(0);
391 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
392 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
393 return TLI.makeLibCall(DAG, LC, NVT, &Op, 1, false, SDLoc(N));
396 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
397 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
398 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
399 GetSoftenedFloat(N->getOperand(1)) };
400 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
406 NVT, Ops, 2, false, SDLoc(N));
409 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
410 assert(N->getOperand(1).getValueType() == MVT::i32 &&
411 "Unsupported power type!");
412 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
413 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
414 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
419 RTLIB::POWI_PPCF128),
420 NVT, Ops, 2, false, SDLoc(N));
423 SDValue DAGTypeLegalizer::SoftenFloatRes_FREM(SDNode *N) {
424 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
425 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
426 GetSoftenedFloat(N->getOperand(1)) };
427 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
433 NVT, Ops, 2, false, SDLoc(N));
436 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
437 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
438 SDValue Op = GetSoftenedFloat(N->getOperand(0));
439 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
444 RTLIB::RINT_PPCF128),
445 NVT, &Op, 1, false, SDLoc(N));
448 SDValue DAGTypeLegalizer::SoftenFloatRes_FROUND(SDNode *N) {
449 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
450 SDValue Op = GetSoftenedFloat(N->getOperand(0));
451 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
456 RTLIB::ROUND_PPCF128),
457 NVT, &Op, 1, false, SDLoc(N));
460 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
461 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
462 SDValue Op = GetSoftenedFloat(N->getOperand(0));
463 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
469 NVT, &Op, 1, false, SDLoc(N));
472 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
473 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
474 SDValue Op = GetSoftenedFloat(N->getOperand(0));
475 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
480 RTLIB::SQRT_PPCF128),
481 NVT, &Op, 1, false, SDLoc(N));
484 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
485 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
486 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
487 GetSoftenedFloat(N->getOperand(1)) };
488 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
494 NVT, Ops, 2, false, SDLoc(N));
497 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
498 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
499 SDValue Op = GetSoftenedFloat(N->getOperand(0));
500 return TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
505 RTLIB::TRUNC_PPCF128),
506 NVT, &Op, 1, false, SDLoc(N));
509 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
510 LoadSDNode *L = cast<LoadSDNode>(N);
511 EVT VT = N->getValueType(0);
512 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
516 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
517 NewL = DAG.getLoad(L->getAddressingMode(), L->getExtensionType(),
518 NVT, dl, L->getChain(), L->getBasePtr(), L->getOffset(),
519 L->getPointerInfo(), NVT, L->isVolatile(),
520 L->isNonTemporal(), false, L->getAlignment());
521 // Legalized the chain result - switch anything that used the old chain to
523 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
527 // Do a non-extending load followed by FP_EXTEND.
528 NewL = DAG.getLoad(L->getAddressingMode(), ISD::NON_EXTLOAD,
529 L->getMemoryVT(), dl, L->getChain(),
530 L->getBasePtr(), L->getOffset(), L->getPointerInfo(),
531 L->getMemoryVT(), L->isVolatile(),
532 L->isNonTemporal(), false, L->getAlignment());
533 // Legalized the chain result - switch anything that used the old chain to
535 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
536 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
539 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
540 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
541 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
542 return DAG.getSelect(SDLoc(N),
543 LHS.getValueType(), N->getOperand(0), LHS, RHS);
546 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
547 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
548 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
549 return DAG.getNode(ISD::SELECT_CC, SDLoc(N),
550 LHS.getValueType(), N->getOperand(0),
551 N->getOperand(1), LHS, RHS, N->getOperand(4));
554 SDValue DAGTypeLegalizer::SoftenFloatRes_UNDEF(SDNode *N) {
555 return DAG.getUNDEF(TLI.getTypeToTransformTo(*DAG.getContext(),
556 N->getValueType(0)));
559 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
560 SDValue Chain = N->getOperand(0); // Get the chain.
561 SDValue Ptr = N->getOperand(1); // Get the pointer.
562 EVT VT = N->getValueType(0);
563 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
567 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2),
568 N->getConstantOperandVal(3));
570 // Legalized the chain result - switch anything that used the old chain to
572 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
576 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
577 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
578 EVT SVT = N->getOperand(0).getValueType();
579 EVT RVT = N->getValueType(0);
583 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
584 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
585 // match. Look for an appropriate libcall.
586 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
587 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
588 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
589 NVT = (MVT::SimpleValueType)t;
590 // The source needs to big enough to hold the operand.
592 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
594 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
596 // Sign/zero extend the argument if the libcall takes a larger type.
597 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
598 NVT, N->getOperand(0));
599 return TLI.makeLibCall(DAG, LC,
600 TLI.getTypeToTransformTo(*DAG.getContext(), RVT),
605 //===----------------------------------------------------------------------===//
606 // Operand Float to Integer Conversion..
607 //===----------------------------------------------------------------------===//
609 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
610 DEBUG(dbgs() << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
612 SDValue Res = SDValue();
614 switch (N->getOpcode()) {
617 dbgs() << "SoftenFloatOperand Op #" << OpNo << ": ";
618 N->dump(&DAG); dbgs() << "\n";
620 llvm_unreachable("Do not know how to soften this operator's operand!");
622 case ISD::BITCAST: Res = SoftenFloatOp_BITCAST(N); break;
623 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
624 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
625 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
626 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
627 case ISD::FP32_TO_FP16:Res = SoftenFloatOp_FP32_TO_FP16(N); break;
628 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
629 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
630 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
633 // If the result is null, the sub-method took care of registering results etc.
634 if (!Res.getNode()) return false;
636 // If the result is N, the sub-method updated N in place. Tell the legalizer
638 if (Res.getNode() == N)
641 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
642 "Invalid operand expansion");
644 ReplaceValueWith(SDValue(N, 0), Res);
648 SDValue DAGTypeLegalizer::SoftenFloatOp_BITCAST(SDNode *N) {
649 return DAG.getNode(ISD::BITCAST, SDLoc(N), N->getValueType(0),
650 GetSoftenedFloat(N->getOperand(0)));
653 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
654 EVT SVT = N->getOperand(0).getValueType();
655 EVT RVT = N->getValueType(0);
657 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
658 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
660 SDValue Op = GetSoftenedFloat(N->getOperand(0));
661 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N));
664 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
665 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
666 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
668 EVT VT = NewLHS.getValueType();
669 NewLHS = GetSoftenedFloat(NewLHS);
670 NewRHS = GetSoftenedFloat(NewRHS);
671 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
673 // If softenSetCCOperands returned a scalar, we need to compare the result
674 // against zero to select between true and false values.
675 if (NewRHS.getNode() == 0) {
676 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
680 // Update N to have the operands specified.
681 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
682 DAG.getCondCode(CCCode), NewLHS, NewRHS,
687 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
688 EVT RVT = N->getValueType(0);
689 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
690 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
691 SDValue Op = GetSoftenedFloat(N->getOperand(0));
692 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N));
695 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
696 EVT RVT = N->getValueType(0);
697 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
698 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
699 SDValue Op = GetSoftenedFloat(N->getOperand(0));
700 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N));
703 SDValue DAGTypeLegalizer::SoftenFloatOp_FP32_TO_FP16(SDNode *N) {
704 EVT RVT = N->getValueType(0);
705 RTLIB::Libcall LC = RTLIB::FPROUND_F32_F16;
706 SDValue Op = GetSoftenedFloat(N->getOperand(0));
707 return TLI.makeLibCall(DAG, LC, RVT, &Op, 1, false, SDLoc(N));
710 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
711 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
712 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
714 EVT VT = NewLHS.getValueType();
715 NewLHS = GetSoftenedFloat(NewLHS);
716 NewRHS = GetSoftenedFloat(NewRHS);
717 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
719 // If softenSetCCOperands returned a scalar, we need to compare the result
720 // against zero to select between true and false values.
721 if (NewRHS.getNode() == 0) {
722 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
726 // Update N to have the operands specified.
727 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
728 N->getOperand(2), N->getOperand(3),
729 DAG.getCondCode(CCCode)),
733 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
734 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
735 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
737 EVT VT = NewLHS.getValueType();
738 NewLHS = GetSoftenedFloat(NewLHS);
739 NewRHS = GetSoftenedFloat(NewRHS);
740 TLI.softenSetCCOperands(DAG, VT, NewLHS, NewRHS, CCCode, SDLoc(N));
742 // If softenSetCCOperands returned a scalar, use it.
743 if (NewRHS.getNode() == 0) {
744 assert(NewLHS.getValueType() == N->getValueType(0) &&
745 "Unexpected setcc expansion!");
749 // Otherwise, update N to have the operands specified.
750 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
751 DAG.getCondCode(CCCode)),
755 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
756 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
757 assert(OpNo == 1 && "Can only soften the stored value!");
758 StoreSDNode *ST = cast<StoreSDNode>(N);
759 SDValue Val = ST->getValue();
762 if (ST->isTruncatingStore())
763 // Do an FP_ROUND followed by a non-truncating store.
764 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
765 Val, DAG.getIntPtrConstant(0)));
767 Val = GetSoftenedFloat(Val);
769 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
770 ST->getPointerInfo(),
771 ST->isVolatile(), ST->isNonTemporal(),
776 //===----------------------------------------------------------------------===//
777 // Float Result Expansion
778 //===----------------------------------------------------------------------===//
780 /// ExpandFloatResult - This method is called when the specified result of the
781 /// specified node is found to need expansion. At this point, the node may also
782 /// have invalid operands or may have other results that need promotion, we just
783 /// know that (at least) one result needs expansion.
784 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
785 DEBUG(dbgs() << "Expand float result: "; N->dump(&DAG); dbgs() << "\n");
789 // See if the target wants to custom expand this node.
790 if (CustomLowerNode(N, N->getValueType(ResNo), true))
793 switch (N->getOpcode()) {
796 dbgs() << "ExpandFloatResult #" << ResNo << ": ";
797 N->dump(&DAG); dbgs() << "\n";
799 llvm_unreachable("Do not know how to expand the result of this operator!");
801 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
802 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
803 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
805 case ISD::MERGE_VALUES: ExpandRes_MERGE_VALUES(N, ResNo, Lo, Hi); break;
806 case ISD::BITCAST: ExpandRes_BITCAST(N, Lo, Hi); break;
807 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
808 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
809 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
810 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
812 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
813 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
814 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
815 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
816 case ISD::FCOPYSIGN: ExpandFloatRes_FCOPYSIGN(N, Lo, Hi); break;
817 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
818 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
819 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
820 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
821 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
822 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
823 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
824 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
825 case ISD::FMA: ExpandFloatRes_FMA(N, Lo, Hi); break;
826 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
827 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
828 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
829 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
830 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
831 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
832 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
833 case ISD::FROUND: ExpandFloatRes_FROUND(N, Lo, Hi); break;
834 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
835 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
836 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
837 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
838 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
839 case ISD::SINT_TO_FP:
840 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
841 case ISD::FREM: ExpandFloatRes_FREM(N, Lo, Hi); break;
844 // If Lo/Hi is null, the sub-method took care of registering results etc.
846 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
849 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
851 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
852 assert(NVT.getSizeInBits() == integerPartWidth &&
853 "Do not know how to expand this float constant!");
854 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
855 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
856 APInt(integerPartWidth, C.getRawData()[1])),
858 Hi = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
859 APInt(integerPartWidth, C.getRawData()[0])),
863 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
865 assert(N->getValueType(0) == MVT::ppcf128 &&
866 "Logic only correct for ppcf128!");
869 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
870 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
871 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
872 Lo = DAG.getSelectCC(dl, Tmp, Hi, Lo,
873 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
877 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
879 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
880 RTLIB::ADD_F32, RTLIB::ADD_F64,
881 RTLIB::ADD_F80, RTLIB::ADD_F128,
884 GetPairElements(Call, Lo, Hi);
887 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
888 SDValue &Lo, SDValue &Hi) {
889 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
890 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
891 RTLIB::CEIL_F80, RTLIB::CEIL_F128,
892 RTLIB::CEIL_PPCF128),
894 GetPairElements(Call, Lo, Hi);
897 void DAGTypeLegalizer::ExpandFloatRes_FCOPYSIGN(SDNode *N,
898 SDValue &Lo, SDValue &Hi) {
899 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
903 RTLIB::COPYSIGN_F128,
904 RTLIB::COPYSIGN_PPCF128),
906 GetPairElements(Call, Lo, Hi);
909 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
910 SDValue &Lo, SDValue &Hi) {
911 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
912 RTLIB::COS_F32, RTLIB::COS_F64,
913 RTLIB::COS_F80, RTLIB::COS_F128,
916 GetPairElements(Call, Lo, Hi);
919 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
921 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
922 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
928 N->getValueType(0), Ops, 2, false,
930 GetPairElements(Call, Lo, Hi);
933 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
934 SDValue &Lo, SDValue &Hi) {
935 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
936 RTLIB::EXP_F32, RTLIB::EXP_F64,
937 RTLIB::EXP_F80, RTLIB::EXP_F128,
940 GetPairElements(Call, Lo, Hi);
943 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
944 SDValue &Lo, SDValue &Hi) {
945 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
946 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
947 RTLIB::EXP2_F80, RTLIB::EXP2_F128,
948 RTLIB::EXP2_PPCF128),
950 GetPairElements(Call, Lo, Hi);
953 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
954 SDValue &Lo, SDValue &Hi) {
955 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
956 RTLIB::FLOOR_F32, RTLIB::FLOOR_F64,
957 RTLIB::FLOOR_F80, RTLIB::FLOOR_F128,
958 RTLIB::FLOOR_PPCF128),
960 GetPairElements(Call, Lo, Hi);
963 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
964 SDValue &Lo, SDValue &Hi) {
965 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
966 RTLIB::LOG_F32, RTLIB::LOG_F64,
967 RTLIB::LOG_F80, RTLIB::LOG_F128,
970 GetPairElements(Call, Lo, Hi);
973 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
974 SDValue &Lo, SDValue &Hi) {
975 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
976 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
977 RTLIB::LOG2_F80, RTLIB::LOG2_F128,
978 RTLIB::LOG2_PPCF128),
980 GetPairElements(Call, Lo, Hi);
983 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
984 SDValue &Lo, SDValue &Hi) {
985 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
986 RTLIB::LOG10_F32, RTLIB::LOG10_F64,
987 RTLIB::LOG10_F80, RTLIB::LOG10_F128,
988 RTLIB::LOG10_PPCF128),
990 GetPairElements(Call, Lo, Hi);
993 void DAGTypeLegalizer::ExpandFloatRes_FMA(SDNode *N, SDValue &Lo,
995 SDValue Ops[3] = { N->getOperand(0), N->getOperand(1), N->getOperand(2) };
996 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1001 RTLIB::FMA_PPCF128),
1002 N->getValueType(0), Ops, 3, false,
1004 GetPairElements(Call, Lo, Hi);
1007 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
1009 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1010 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1015 RTLIB::MUL_PPCF128),
1016 N->getValueType(0), Ops, 2, false,
1018 GetPairElements(Call, Lo, Hi);
1021 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
1022 SDValue &Lo, SDValue &Hi) {
1023 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1024 RTLIB::NEARBYINT_F32,
1025 RTLIB::NEARBYINT_F64,
1026 RTLIB::NEARBYINT_F80,
1027 RTLIB::NEARBYINT_F128,
1028 RTLIB::NEARBYINT_PPCF128),
1030 GetPairElements(Call, Lo, Hi);
1033 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
1036 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1037 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
1038 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
1041 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
1043 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), N->getValueType(0));
1044 Hi = DAG.getNode(ISD::FP_EXTEND, SDLoc(N), NVT, N->getOperand(0));
1045 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1046 APInt(NVT.getSizeInBits(), 0)), NVT);
1049 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
1050 SDValue &Lo, SDValue &Hi) {
1051 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1052 RTLIB::POW_F32, RTLIB::POW_F64,
1053 RTLIB::POW_F80, RTLIB::POW_F128,
1054 RTLIB::POW_PPCF128),
1056 GetPairElements(Call, Lo, Hi);
1059 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1060 SDValue &Lo, SDValue &Hi) {
1061 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1062 RTLIB::POWI_F32, RTLIB::POWI_F64,
1063 RTLIB::POWI_F80, RTLIB::POWI_F128,
1064 RTLIB::POWI_PPCF128),
1066 GetPairElements(Call, Lo, Hi);
1069 void DAGTypeLegalizer::ExpandFloatRes_FREM(SDNode *N,
1070 SDValue &Lo, SDValue &Hi) {
1071 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1072 RTLIB::REM_F32, RTLIB::REM_F64,
1073 RTLIB::REM_F80, RTLIB::REM_F128,
1074 RTLIB::REM_PPCF128),
1076 GetPairElements(Call, Lo, Hi);
1079 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1080 SDValue &Lo, SDValue &Hi) {
1081 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1082 RTLIB::RINT_F32, RTLIB::RINT_F64,
1083 RTLIB::RINT_F80, RTLIB::RINT_F128,
1084 RTLIB::RINT_PPCF128),
1086 GetPairElements(Call, Lo, Hi);
1089 void DAGTypeLegalizer::ExpandFloatRes_FROUND(SDNode *N,
1090 SDValue &Lo, SDValue &Hi) {
1091 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1096 RTLIB::ROUND_PPCF128),
1098 GetPairElements(Call, Lo, Hi);
1101 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1102 SDValue &Lo, SDValue &Hi) {
1103 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1104 RTLIB::SIN_F32, RTLIB::SIN_F64,
1105 RTLIB::SIN_F80, RTLIB::SIN_F128,
1106 RTLIB::SIN_PPCF128),
1108 GetPairElements(Call, Lo, Hi);
1111 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1112 SDValue &Lo, SDValue &Hi) {
1113 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1114 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1115 RTLIB::SQRT_F80, RTLIB::SQRT_F128,
1116 RTLIB::SQRT_PPCF128),
1118 GetPairElements(Call, Lo, Hi);
1121 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1123 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1124 SDValue Call = TLI.makeLibCall(DAG, GetFPLibCall(N->getValueType(0),
1129 RTLIB::SUB_PPCF128),
1130 N->getValueType(0), Ops, 2, false,
1132 GetPairElements(Call, Lo, Hi);
1135 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1136 SDValue &Lo, SDValue &Hi) {
1137 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1138 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1139 RTLIB::TRUNC_F80, RTLIB::TRUNC_F128,
1140 RTLIB::TRUNC_PPCF128),
1142 GetPairElements(Call, Lo, Hi);
1145 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1147 if (ISD::isNormalLoad(N)) {
1148 ExpandRes_NormalLoad(N, Lo, Hi);
1152 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1153 LoadSDNode *LD = cast<LoadSDNode>(N);
1154 SDValue Chain = LD->getChain();
1155 SDValue Ptr = LD->getBasePtr();
1158 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), LD->getValueType(0));
1159 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1160 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1162 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1163 LD->getPointerInfo(), LD->getMemoryVT(), LD->isVolatile(),
1164 LD->isNonTemporal(), LD->getAlignment());
1166 // Remember the chain.
1167 Chain = Hi.getValue(1);
1169 // The low part is zero.
1170 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1171 APInt(NVT.getSizeInBits(), 0)), NVT);
1173 // Modified the chain - switch anything that used the old chain to use the
1175 ReplaceValueWith(SDValue(LD, 1), Chain);
1178 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1180 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1181 EVT VT = N->getValueType(0);
1182 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(), VT);
1183 SDValue Src = N->getOperand(0);
1184 EVT SrcVT = Src.getValueType();
1185 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1188 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1189 // When promoting partial word types to i32 we must honor the signedness,
1191 if (SrcVT.bitsLE(MVT::i32)) {
1192 // The integer can be represented exactly in an f64.
1193 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1195 Lo = DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(NVT),
1196 APInt(NVT.getSizeInBits(), 0)), NVT);
1197 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1199 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1200 if (SrcVT.bitsLE(MVT::i64)) {
1201 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1203 LC = RTLIB::SINTTOFP_I64_PPCF128;
1204 } else if (SrcVT.bitsLE(MVT::i128)) {
1205 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1206 LC = RTLIB::SINTTOFP_I128_PPCF128;
1208 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1210 Hi = TLI.makeLibCall(DAG, LC, VT, &Src, 1, true, dl);
1211 GetPairElements(Hi, Lo, Hi);
1217 // Unsigned - fix up the SINT_TO_FP value just calculated.
1218 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1219 SrcVT = Src.getValueType();
1221 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1222 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1223 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1224 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1225 ArrayRef<uint64_t> Parts;
1227 switch (SrcVT.getSimpleVT().SimpleTy) {
1229 llvm_unreachable("Unsupported UINT_TO_FP!");
1241 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1242 DAG.getConstantFP(APFloat(APFloat::PPCDoubleDouble,
1245 Lo = DAG.getSelectCC(dl, Src, DAG.getConstant(0, SrcVT),
1246 Lo, Hi, ISD::SETLT);
1247 GetPairElements(Lo, Lo, Hi);
1251 //===----------------------------------------------------------------------===//
1252 // Float Operand Expansion
1253 //===----------------------------------------------------------------------===//
1255 /// ExpandFloatOperand - This method is called when the specified operand of the
1256 /// specified node is found to need expansion. At this point, all of the result
1257 /// types of the node are known to be legal, but other operands of the node may
1258 /// need promotion or expansion as well as the specified one.
1259 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1260 DEBUG(dbgs() << "Expand float operand: "; N->dump(&DAG); dbgs() << "\n");
1261 SDValue Res = SDValue();
1263 // See if the target wants to custom expand this node.
1264 if (CustomLowerNode(N, N->getOperand(OpNo).getValueType(), false))
1267 switch (N->getOpcode()) {
1270 dbgs() << "ExpandFloatOperand Op #" << OpNo << ": ";
1271 N->dump(&DAG); dbgs() << "\n";
1273 llvm_unreachable("Do not know how to expand this operator's operand!");
1275 case ISD::BITCAST: Res = ExpandOp_BITCAST(N); break;
1276 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1277 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1279 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1280 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1281 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1282 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1283 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1284 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1285 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1289 // If the result is null, the sub-method took care of registering results etc.
1290 if (!Res.getNode()) return false;
1292 // If the result is N, the sub-method updated N in place. Tell the legalizer
1294 if (Res.getNode() == N)
1297 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1298 "Invalid operand expansion");
1300 ReplaceValueWith(SDValue(N, 0), Res);
1304 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1305 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1306 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1308 ISD::CondCode &CCCode,
1310 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1311 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1312 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1314 assert(NewLHS.getValueType() == MVT::ppcf128 && "Unsupported setcc type!");
1316 // FIXME: This generated code sucks. We want to generate
1317 // FCMPU crN, hi1, hi2
1319 // FCMPU crN, lo1, lo2
1320 // The following can be improved, but not that much.
1321 SDValue Tmp1, Tmp2, Tmp3;
1322 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1323 LHSHi, RHSHi, ISD::SETOEQ);
1324 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSLo.getValueType()),
1325 LHSLo, RHSLo, CCCode);
1326 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1327 Tmp1 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1328 LHSHi, RHSHi, ISD::SETUNE);
1329 Tmp2 = DAG.getSetCC(dl, getSetCCResultType(LHSHi.getValueType()),
1330 LHSHi, RHSHi, CCCode);
1331 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1332 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1333 NewRHS = SDValue(); // LHS is the result, not a compare.
1336 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1337 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1338 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1339 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1341 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1342 // against zero to select between true and false values.
1343 if (NewRHS.getNode() == 0) {
1344 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1345 CCCode = ISD::SETNE;
1348 // Update N to have the operands specified.
1349 return SDValue(DAG.UpdateNodeOperands(N, N->getOperand(0),
1350 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1351 N->getOperand(4)), 0);
1354 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1355 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1356 "Logic only correct for ppcf128!");
1358 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1359 // Round it the rest of the way (e.g. to f32) if needed.
1360 return DAG.getNode(ISD::FP_ROUND, SDLoc(N),
1361 N->getValueType(0), Hi, N->getOperand(1));
1364 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1365 EVT RVT = N->getValueType(0);
1368 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1369 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1370 if (RVT == MVT::i32) {
1371 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1372 "Logic only correct for ppcf128!");
1373 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1374 N->getOperand(0), DAG.getValueType(MVT::f64));
1375 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1376 DAG.getIntPtrConstant(1));
1377 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1380 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1381 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1382 return TLI.makeLibCall(DAG, LC, RVT, &N->getOperand(0), 1, false, dl);
1385 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1386 EVT RVT = N->getValueType(0);
1389 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1390 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1391 if (RVT == MVT::i32) {
1392 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1393 "Logic only correct for ppcf128!");
1394 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1395 APFloat APF = APFloat(APFloat::PPCDoubleDouble, APInt(128, TwoE31));
1396 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1397 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1398 // FIXME: generated code sucks.
1399 return DAG.getSelectCC(dl, N->getOperand(0), Tmp,
1400 DAG.getNode(ISD::ADD, dl, MVT::i32,
1401 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1402 DAG.getNode(ISD::FSUB, dl,
1406 DAG.getConstant(0x80000000, MVT::i32)),
1407 DAG.getNode(ISD::FP_TO_SINT, dl,
1408 MVT::i32, N->getOperand(0)),
1412 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1413 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1414 return TLI.makeLibCall(DAG, LC, N->getValueType(0), &N->getOperand(0), 1,
1418 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1419 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1420 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1421 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1423 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1424 // against zero to select between true and false values.
1425 if (NewRHS.getNode() == 0) {
1426 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1427 CCCode = ISD::SETNE;
1430 // Update N to have the operands specified.
1431 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1432 N->getOperand(2), N->getOperand(3),
1433 DAG.getCondCode(CCCode)), 0);
1436 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1437 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1438 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1439 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, SDLoc(N));
1441 // If ExpandSetCCOperands returned a scalar, use it.
1442 if (NewRHS.getNode() == 0) {
1443 assert(NewLHS.getValueType() == N->getValueType(0) &&
1444 "Unexpected setcc expansion!");
1448 // Otherwise, update N to have the operands specified.
1449 return SDValue(DAG.UpdateNodeOperands(N, NewLHS, NewRHS,
1450 DAG.getCondCode(CCCode)), 0);
1453 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1454 if (ISD::isNormalStore(N))
1455 return ExpandOp_NormalStore(N, OpNo);
1457 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1458 assert(OpNo == 1 && "Can only expand the stored value so far");
1459 StoreSDNode *ST = cast<StoreSDNode>(N);
1461 SDValue Chain = ST->getChain();
1462 SDValue Ptr = ST->getBasePtr();
1464 EVT NVT = TLI.getTypeToTransformTo(*DAG.getContext(),
1465 ST->getValue().getValueType());
1466 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1467 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1471 GetExpandedOp(ST->getValue(), Lo, Hi);
1473 return DAG.getTruncStore(Chain, SDLoc(N), Hi, Ptr,
1474 ST->getPointerInfo(),
1475 ST->getMemoryVT(), ST->isVolatile(),
1476 ST->isNonTemporal(), ST->getAlignment());