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"
25 /// GetFPLibCall - Return the right libcall for the given floating point type.
26 static RTLIB::Libcall GetFPLibCall(MVT VT,
27 RTLIB::Libcall Call_F32,
28 RTLIB::Libcall Call_F64,
29 RTLIB::Libcall Call_F80,
30 RTLIB::Libcall Call_PPCF128) {
32 VT == MVT::f32 ? Call_F32 :
33 VT == MVT::f64 ? Call_F64 :
34 VT == MVT::f80 ? Call_F80 :
35 VT == MVT::ppcf128 ? Call_PPCF128 :
36 RTLIB::UNKNOWN_LIBCALL;
39 //===----------------------------------------------------------------------===//
40 // Result Float to Integer Conversion.
41 //===----------------------------------------------------------------------===//
43 void DAGTypeLegalizer::SoftenFloatResult(SDNode *N, unsigned ResNo) {
44 DEBUG(cerr << "Soften float result " << ResNo << ": "; N->dump(&DAG);
46 SDValue R = SDValue();
48 switch (N->getOpcode()) {
51 cerr << "SoftenFloatResult #" << ResNo << ": ";
52 N->dump(&DAG); cerr << "\n";
54 assert(0 && "Do not know how to soften the result of this operator!");
57 case ISD::BIT_CONVERT: R = SoftenFloatRes_BIT_CONVERT(N); break;
58 case ISD::BUILD_PAIR: R = SoftenFloatRes_BUILD_PAIR(N); break;
60 R = SoftenFloatRes_ConstantFP(cast<ConstantFPSDNode>(N));
62 case ISD::EXTRACT_VECTOR_ELT:
63 R = SoftenFloatRes_EXTRACT_VECTOR_ELT(N); break;
64 case ISD::FABS: R = SoftenFloatRes_FABS(N); break;
65 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
66 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
67 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
68 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
69 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
70 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
71 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
72 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
73 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
74 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
75 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
76 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
77 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
78 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
79 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
80 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
81 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
82 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
83 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
84 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
85 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
86 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
87 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
88 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
89 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
90 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
92 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
93 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
96 // If R is null, the sub-method took care of registering the result.
98 SetSoftenedFloat(SDValue(N, ResNo), R);
101 SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
102 return BitConvertToInteger(N->getOperand(0));
105 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
106 // Convert the inputs to integers, and build a new pair out of them.
107 return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(),
108 TLI.getTypeToTransformTo(N->getValueType(0)),
109 BitConvertToInteger(N->getOperand(0)),
110 BitConvertToInteger(N->getOperand(1)));
113 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
114 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
115 TLI.getTypeToTransformTo(N->getValueType(0)));
118 SDValue DAGTypeLegalizer::SoftenFloatRes_EXTRACT_VECTOR_ELT(SDNode *N) {
119 SDValue NewOp = BitConvertVectorToIntegerVector(N->getOperand(0));
120 return DAG.getNode(ISD::EXTRACT_VECTOR_ELT, N->getDebugLoc(),
121 NewOp.getValueType().getVectorElementType(),
122 NewOp, N->getOperand(1));
125 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
126 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
127 unsigned Size = NVT.getSizeInBits();
129 // Mask = ~(1 << (Size-1))
130 SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
132 SDValue Op = GetSoftenedFloat(N->getOperand(0));
133 return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
136 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
137 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
138 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
139 GetSoftenedFloat(N->getOperand(1)) };
140 return MakeLibCall(GetFPLibCall(N->getValueType(0),
145 NVT, Ops, 2, false, N->getDebugLoc());
148 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
149 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
150 SDValue Op = GetSoftenedFloat(N->getOperand(0));
151 return MakeLibCall(GetFPLibCall(N->getValueType(0),
155 RTLIB::CEIL_PPCF128),
156 NVT, &Op, 1, false, N->getDebugLoc());
159 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
160 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
161 SDValue RHS = BitConvertToInteger(N->getOperand(1));
162 DebugLoc dl = N->getDebugLoc();
164 MVT LVT = LHS.getValueType();
165 MVT RVT = RHS.getValueType();
167 unsigned LSize = LVT.getSizeInBits();
168 unsigned RSize = RVT.getSizeInBits();
170 // First get the sign bit of second operand.
171 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
172 DAG.getConstant(RSize - 1,
173 TLI.getShiftAmountTy()));
174 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
176 // Shift right or sign-extend it if the two operands have different types.
177 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
179 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
180 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
181 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
182 } else if (SizeDiff < 0) {
183 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
184 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
185 DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
188 // Clear the sign bit of the first operand.
189 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
190 DAG.getConstant(LSize - 1,
191 TLI.getShiftAmountTy()));
192 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
193 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
195 // Or the value with the sign bit.
196 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
199 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
200 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
201 SDValue Op = GetSoftenedFloat(N->getOperand(0));
202 return MakeLibCall(GetFPLibCall(N->getValueType(0),
207 NVT, &Op, 1, false, N->getDebugLoc());
210 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
211 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
212 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
213 GetSoftenedFloat(N->getOperand(1)) };
214 return MakeLibCall(GetFPLibCall(N->getValueType(0),
219 NVT, Ops, 2, false, N->getDebugLoc());
222 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
223 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
224 SDValue Op = GetSoftenedFloat(N->getOperand(0));
225 return MakeLibCall(GetFPLibCall(N->getValueType(0),
230 NVT, &Op, 1, false, N->getDebugLoc());
233 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
234 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
235 SDValue Op = GetSoftenedFloat(N->getOperand(0));
236 return MakeLibCall(GetFPLibCall(N->getValueType(0),
240 RTLIB::EXP2_PPCF128),
241 NVT, &Op, 1, false, N->getDebugLoc());
244 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
245 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
246 SDValue Op = GetSoftenedFloat(N->getOperand(0));
247 return MakeLibCall(GetFPLibCall(N->getValueType(0),
251 RTLIB::FLOOR_PPCF128),
252 NVT, &Op, 1, false, N->getDebugLoc());
255 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
256 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
257 SDValue Op = GetSoftenedFloat(N->getOperand(0));
258 return MakeLibCall(GetFPLibCall(N->getValueType(0),
263 NVT, &Op, 1, false, N->getDebugLoc());
266 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
267 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
268 SDValue Op = GetSoftenedFloat(N->getOperand(0));
269 return MakeLibCall(GetFPLibCall(N->getValueType(0),
273 RTLIB::LOG2_PPCF128),
274 NVT, &Op, 1, false, N->getDebugLoc());
277 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
278 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
279 SDValue Op = GetSoftenedFloat(N->getOperand(0));
280 return MakeLibCall(GetFPLibCall(N->getValueType(0),
284 RTLIB::LOG10_PPCF128),
285 NVT, &Op, 1, false, N->getDebugLoc());
288 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
289 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
290 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
291 GetSoftenedFloat(N->getOperand(1)) };
292 return MakeLibCall(GetFPLibCall(N->getValueType(0),
297 NVT, Ops, 2, false, N->getDebugLoc());
300 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
301 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
302 SDValue Op = GetSoftenedFloat(N->getOperand(0));
303 return MakeLibCall(GetFPLibCall(N->getValueType(0),
304 RTLIB::NEARBYINT_F32,
305 RTLIB::NEARBYINT_F64,
306 RTLIB::NEARBYINT_F80,
307 RTLIB::NEARBYINT_PPCF128),
308 NVT, &Op, 1, false, N->getDebugLoc());
311 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
312 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
313 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
314 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
315 GetSoftenedFloat(N->getOperand(0)) };
316 return MakeLibCall(GetFPLibCall(N->getValueType(0),
321 NVT, Ops, 2, false, N->getDebugLoc());
324 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
325 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
326 SDValue Op = N->getOperand(0);
327 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
328 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
329 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
332 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
333 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
334 SDValue Op = N->getOperand(0);
335 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
336 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
337 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
340 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
341 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
342 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
343 GetSoftenedFloat(N->getOperand(1)) };
344 return MakeLibCall(GetFPLibCall(N->getValueType(0),
349 NVT, Ops, 2, false, N->getDebugLoc());
352 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
353 assert(N->getOperand(1).getValueType() == MVT::i32 &&
354 "Unsupported power type!");
355 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
356 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
357 return MakeLibCall(GetFPLibCall(N->getValueType(0),
361 RTLIB::POWI_PPCF128),
362 NVT, Ops, 2, false, N->getDebugLoc());
365 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
366 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
367 SDValue Op = GetSoftenedFloat(N->getOperand(0));
368 return MakeLibCall(GetFPLibCall(N->getValueType(0),
372 RTLIB::RINT_PPCF128),
373 NVT, &Op, 1, false, N->getDebugLoc());
376 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
377 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
378 SDValue Op = GetSoftenedFloat(N->getOperand(0));
379 return MakeLibCall(GetFPLibCall(N->getValueType(0),
384 NVT, &Op, 1, false, N->getDebugLoc());
387 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
388 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
389 SDValue Op = GetSoftenedFloat(N->getOperand(0));
390 return MakeLibCall(GetFPLibCall(N->getValueType(0),
394 RTLIB::SQRT_PPCF128),
395 NVT, &Op, 1, false, N->getDebugLoc());
398 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
399 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
400 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
401 GetSoftenedFloat(N->getOperand(1)) };
402 return MakeLibCall(GetFPLibCall(N->getValueType(0),
407 NVT, Ops, 2, false, N->getDebugLoc());
410 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
411 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
412 SDValue Op = GetSoftenedFloat(N->getOperand(0));
413 return MakeLibCall(GetFPLibCall(N->getValueType(0),
417 RTLIB::TRUNC_PPCF128),
418 NVT, &Op, 1, false, N->getDebugLoc());
421 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
422 LoadSDNode *L = cast<LoadSDNode>(N);
423 MVT VT = N->getValueType(0);
424 MVT NVT = TLI.getTypeToTransformTo(VT);
425 DebugLoc dl = N->getDebugLoc();
428 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
429 NewL = DAG.getLoad(L->getAddressingMode(), dl, L->getExtensionType(),
430 NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
431 L->getSrcValue(), L->getSrcValueOffset(), NVT,
432 L->isVolatile(), L->getAlignment());
433 // Legalized the chain result - switch anything that used the old chain to
435 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
439 // Do a non-extending load followed by FP_EXTEND.
440 NewL = DAG.getLoad(L->getAddressingMode(), dl, ISD::NON_EXTLOAD,
441 L->getMemoryVT(), L->getChain(),
442 L->getBasePtr(), L->getOffset(),
443 L->getSrcValue(), L->getSrcValueOffset(),
445 L->isVolatile(), L->getAlignment());
446 // Legalized the chain result - switch anything that used the old chain to
448 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
449 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
452 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
453 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
454 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
455 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
456 LHS.getValueType(), N->getOperand(0),LHS,RHS);
459 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
460 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
461 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
462 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
463 LHS.getValueType(), N->getOperand(0),
464 N->getOperand(1), LHS, RHS, N->getOperand(4));
467 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
468 SDValue Chain = N->getOperand(0); // Get the chain.
469 SDValue Ptr = N->getOperand(1); // Get the pointer.
470 MVT VT = N->getValueType(0);
471 MVT NVT = TLI.getTypeToTransformTo(VT);
472 DebugLoc dl = N->getDebugLoc();
475 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2));
477 // Legalized the chain result - switch anything that used the old chain to
479 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
483 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
484 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
485 MVT SVT = N->getOperand(0).getValueType();
486 MVT RVT = N->getValueType(0);
488 DebugLoc dl = N->getDebugLoc();
490 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
491 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
492 // match. Look for an appropriate libcall.
493 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
494 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
495 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
496 NVT = (MVT::SimpleValueType)t;
497 // The source needs to big enough to hold the operand.
499 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
501 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
503 // Sign/zero extend the argument if the libcall takes a larger type.
504 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
505 NVT, N->getOperand(0));
506 return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false, dl);
510 //===----------------------------------------------------------------------===//
511 // Operand Float to Integer Conversion..
512 //===----------------------------------------------------------------------===//
514 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
515 DEBUG(cerr << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
517 SDValue Res = SDValue();
519 switch (N->getOpcode()) {
522 cerr << "SoftenFloatOperand Op #" << OpNo << ": ";
523 N->dump(&DAG); cerr << "\n";
525 assert(0 && "Do not know how to soften this operator's operand!");
528 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
529 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
530 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
531 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
532 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
533 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
534 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
535 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
538 // If the result is null, the sub-method took care of registering results etc.
539 if (!Res.getNode()) return false;
541 // If the result is N, the sub-method updated N in place. Tell the legalizer
543 if (Res.getNode() == N)
546 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
547 "Invalid operand expansion");
549 ReplaceValueWith(SDValue(N, 0), Res);
553 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
554 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
555 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
556 ISD::CondCode &CCCode, DebugLoc dl) {
557 SDValue LHSInt = GetSoftenedFloat(NewLHS);
558 SDValue RHSInt = GetSoftenedFloat(NewRHS);
559 MVT VT = NewLHS.getValueType();
561 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
563 // Expand into one or more soft-fp libcall(s).
564 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
568 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
572 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
576 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
580 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
584 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
588 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
591 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
594 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
597 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
600 // SETONE = SETOLT | SETOGT
601 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
604 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
607 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
610 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
613 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
616 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
618 default: assert(false && "Do not know how to soften this setcc!");
622 MVT RetVT = MVT::i32; // FIXME: is this the correct return type?
623 SDValue Ops[2] = { LHSInt, RHSInt };
624 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
625 NewRHS = DAG.getConstant(0, RetVT);
626 CCCode = TLI.getCmpLibcallCC(LC1);
627 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
628 SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
629 NewLHS, NewRHS, DAG.getCondCode(CCCode));
630 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
631 NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
632 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
633 NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
638 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
639 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0),
640 GetSoftenedFloat(N->getOperand(0)));
643 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
644 MVT SVT = N->getOperand(0).getValueType();
645 MVT RVT = N->getValueType(0);
647 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
648 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
650 SDValue Op = GetSoftenedFloat(N->getOperand(0));
651 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
654 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
655 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
656 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
657 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
659 // If SoftenSetCCOperands returned a scalar, we need to compare the result
660 // against zero to select between true and false values.
661 if (NewRHS.getNode() == 0) {
662 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
666 // Update N to have the operands specified.
667 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
668 DAG.getCondCode(CCCode), NewLHS, NewRHS,
672 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
673 MVT RVT = N->getValueType(0);
674 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
675 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
676 SDValue Op = GetSoftenedFloat(N->getOperand(0));
677 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
680 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
681 MVT RVT = N->getValueType(0);
682 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
683 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
684 SDValue Op = GetSoftenedFloat(N->getOperand(0));
685 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
688 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
689 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
690 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
691 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
693 // If SoftenSetCCOperands returned a scalar, we need to compare the result
694 // against zero to select between true and false values.
695 if (NewRHS.getNode() == 0) {
696 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
700 // Update N to have the operands specified.
701 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
702 N->getOperand(2), N->getOperand(3),
703 DAG.getCondCode(CCCode));
706 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
707 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
708 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
709 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
711 // If SoftenSetCCOperands returned a scalar, use it.
712 if (NewRHS.getNode() == 0) {
713 assert(NewLHS.getValueType() == N->getValueType(0) &&
714 "Unexpected setcc expansion!");
718 // Otherwise, update N to have the operands specified.
719 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
720 DAG.getCondCode(CCCode));
723 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
724 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
725 assert(OpNo == 1 && "Can only soften the stored value!");
726 StoreSDNode *ST = cast<StoreSDNode>(N);
727 SDValue Val = ST->getValue();
728 DebugLoc dl = N->getDebugLoc();
730 if (ST->isTruncatingStore())
731 // Do an FP_ROUND followed by a non-truncating store.
732 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
733 Val, DAG.getIntPtrConstant(0)));
735 Val = GetSoftenedFloat(Val);
737 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
738 ST->getSrcValue(), ST->getSrcValueOffset(),
739 ST->isVolatile(), ST->getAlignment());
743 //===----------------------------------------------------------------------===//
744 // Float Result Expansion
745 //===----------------------------------------------------------------------===//
747 /// ExpandFloatResult - This method is called when the specified result of the
748 /// specified node is found to need expansion. At this point, the node may also
749 /// have invalid operands or may have other results that need promotion, we just
750 /// know that (at least) one result needs expansion.
751 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
752 DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n");
756 // See if the target wants to custom expand this node.
757 if (CustomLowerResults(N, N->getValueType(ResNo), true))
760 switch (N->getOpcode()) {
763 cerr << "ExpandFloatResult #" << ResNo << ": ";
764 N->dump(&DAG); cerr << "\n";
766 assert(0 && "Do not know how to expand the result of this operator!");
769 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
770 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
771 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
772 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
774 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
775 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
776 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
777 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
778 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
780 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
781 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
782 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
783 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
784 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
785 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
786 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
787 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
788 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
789 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
790 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
791 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
792 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
793 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
794 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
795 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
796 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
797 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
798 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
799 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
800 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
801 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
802 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
803 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
804 case ISD::SINT_TO_FP:
805 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
808 // If Lo/Hi is null, the sub-method took care of registering results etc.
810 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
813 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
815 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
816 assert(NVT.getSizeInBits() == integerPartWidth &&
817 "Do not know how to expand this float constant!");
818 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
819 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
820 &C.getRawData()[1])), NVT);
821 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
822 &C.getRawData()[0])), NVT);
825 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
827 assert(N->getValueType(0) == MVT::ppcf128 &&
828 "Logic only correct for ppcf128!");
829 DebugLoc dl = N->getDebugLoc();
831 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
832 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
833 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
834 Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
835 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
836 DAG.getCondCode(ISD::SETEQ));
839 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
841 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
842 RTLIB::ADD_F32, RTLIB::ADD_F64,
843 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
845 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
846 "Call lowered wrongly!");
847 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
850 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
851 SDValue &Lo, SDValue &Hi) {
852 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
853 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
854 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
856 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
857 "Call lowered wrongly!");
858 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
861 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
862 SDValue &Lo, SDValue &Hi) {
863 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
864 RTLIB::COS_F32, RTLIB::COS_F64,
865 RTLIB::COS_F80, RTLIB::COS_PPCF128),
867 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
868 "Call lowered wrongly!");
869 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
872 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
874 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
875 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
880 N->getValueType(0), Ops, 2, false,
882 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
883 "Call lowered wrongly!");
884 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
887 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
888 SDValue &Lo, SDValue &Hi) {
889 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
890 RTLIB::EXP_F32, RTLIB::EXP_F64,
891 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
893 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
894 "Call lowered wrongly!");
895 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
898 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
899 SDValue &Lo, SDValue &Hi) {
900 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
901 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
902 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
904 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
905 "Call lowered wrongly!");
906 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
909 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
910 SDValue &Lo, SDValue &Hi) {
911 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
912 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
913 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
915 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
916 "Call lowered wrongly!");
917 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
920 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
921 SDValue &Lo, SDValue &Hi) {
922 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
923 RTLIB::LOG_F32, RTLIB::LOG_F64,
924 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
926 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
927 "Call lowered wrongly!");
928 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
931 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
932 SDValue &Lo, SDValue &Hi) {
933 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
934 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
935 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
937 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
938 "Call lowered wrongly!");
939 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
942 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
943 SDValue &Lo, SDValue &Hi) {
944 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
945 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
946 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
948 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
949 "Call lowered wrongly!");
950 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
953 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
955 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
956 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
961 N->getValueType(0), Ops, 2, false,
963 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
964 "Call lowered wrongly!");
965 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
968 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
969 SDValue &Lo, SDValue &Hi) {
970 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
971 RTLIB::NEARBYINT_F32,
972 RTLIB::NEARBYINT_F64,
973 RTLIB::NEARBYINT_F80,
974 RTLIB::NEARBYINT_PPCF128),
976 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
977 "Call lowered wrongly!");
978 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
981 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
983 DebugLoc dl = N->getDebugLoc();
984 GetExpandedFloat(N->getOperand(0), Lo, Hi);
985 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
986 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
989 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
991 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
992 Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
993 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
996 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
997 SDValue &Lo, SDValue &Hi) {
998 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
999 RTLIB::POW_F32, RTLIB::POW_F64,
1000 RTLIB::POW_F80, RTLIB::POW_PPCF128),
1002 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1003 "Call lowered wrongly!");
1004 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1007 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
1008 SDValue &Lo, SDValue &Hi) {
1009 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1010 RTLIB::POWI_F32, RTLIB::POWI_F64,
1011 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1013 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1014 "Call lowered wrongly!");
1015 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1018 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1019 SDValue &Lo, SDValue &Hi) {
1020 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1021 RTLIB::RINT_F32, RTLIB::RINT_F64,
1022 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1024 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1025 "Call lowered wrongly!");
1026 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1029 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1030 SDValue &Lo, SDValue &Hi) {
1031 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1032 RTLIB::SIN_F32, RTLIB::SIN_F64,
1033 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1035 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1036 "Call lowered wrongly!");
1037 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1040 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1041 SDValue &Lo, SDValue &Hi) {
1042 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1043 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1044 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1046 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1047 "Call lowered wrongly!");
1048 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1051 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1053 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1054 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1058 RTLIB::SUB_PPCF128),
1059 N->getValueType(0), Ops, 2, false,
1061 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1062 "Call lowered wrongly!");
1063 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1066 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1067 SDValue &Lo, SDValue &Hi) {
1068 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1069 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1070 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1072 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1073 "Call lowered wrongly!");
1074 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1077 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1079 if (ISD::isNormalLoad(N)) {
1080 ExpandRes_NormalLoad(N, Lo, Hi);
1084 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1085 LoadSDNode *LD = cast<LoadSDNode>(N);
1086 SDValue Chain = LD->getChain();
1087 SDValue Ptr = LD->getBasePtr();
1088 DebugLoc dl = N->getDebugLoc();
1090 MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
1091 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1092 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1094 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1095 LD->getSrcValue(), LD->getSrcValueOffset(),
1097 LD->isVolatile(), LD->getAlignment());
1099 // Remember the chain.
1100 Chain = Hi.getValue(1);
1102 // The low part is zero.
1103 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1105 // Modified the chain - switch anything that used the old chain to use the
1107 ReplaceValueWith(SDValue(LD, 1), Chain);
1110 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1112 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1113 MVT VT = N->getValueType(0);
1114 MVT NVT = TLI.getTypeToTransformTo(VT);
1115 SDValue Src = N->getOperand(0);
1116 MVT SrcVT = Src.getValueType();
1117 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1118 DebugLoc dl = N->getDebugLoc();
1120 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1121 // When promoting partial word types to i32 we must honor the signedness,
1123 if (SrcVT.bitsLE(MVT::i32)) {
1124 // The integer can be represented exactly in an f64.
1125 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1127 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1128 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1130 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1131 if (SrcVT.bitsLE(MVT::i64)) {
1132 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1134 LC = RTLIB::SINTTOFP_I64_PPCF128;
1135 } else if (SrcVT.bitsLE(MVT::i128)) {
1136 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1137 LC = RTLIB::SINTTOFP_I128_PPCF128;
1139 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1141 Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1142 assert(Hi.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1143 "Call lowered wrongly!");
1144 Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
1150 // Unsigned - fix up the SINT_TO_FP value just calculated.
1151 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1152 SrcVT = Src.getValueType();
1154 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1155 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1156 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1157 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1158 const uint64_t *Parts = 0;
1160 switch (SrcVT.getSimpleVT()) {
1162 assert(false && "Unsupported UINT_TO_FP!");
1174 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1175 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1177 Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1178 Lo, Hi, DAG.getCondCode(ISD::SETLT));
1179 Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Lo, DAG.getIntPtrConstant(1));
1180 Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Lo, DAG.getIntPtrConstant(0));
1184 //===----------------------------------------------------------------------===//
1185 // Float Operand Expansion
1186 //===----------------------------------------------------------------------===//
1188 /// ExpandFloatOperand - This method is called when the specified operand of the
1189 /// specified node is found to need expansion. At this point, all of the result
1190 /// types of the node are known to be legal, but other operands of the node may
1191 /// need promotion or expansion as well as the specified one.
1192 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1193 DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n");
1194 SDValue Res = SDValue();
1196 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1197 == TargetLowering::Custom)
1198 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1200 if (Res.getNode() == 0) {
1201 switch (N->getOpcode()) {
1204 cerr << "ExpandFloatOperand Op #" << OpNo << ": ";
1205 N->dump(&DAG); cerr << "\n";
1207 assert(0 && "Do not know how to expand this operator's operand!");
1210 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1211 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1212 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1214 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1215 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1216 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1217 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1218 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1219 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1220 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1225 // If the result is null, the sub-method took care of registering results etc.
1226 if (!Res.getNode()) return false;
1228 // If the result is N, the sub-method updated N in place. Tell the legalizer
1230 if (Res.getNode() == N)
1233 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1234 "Invalid operand expansion");
1236 ReplaceValueWith(SDValue(N, 0), Res);
1240 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1241 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1242 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1244 ISD::CondCode &CCCode,
1246 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1247 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1248 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1250 MVT VT = NewLHS.getValueType();
1251 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1253 // FIXME: This generated code sucks. We want to generate
1254 // FCMPU crN, hi1, hi2
1256 // FCMPU crN, lo1, lo2
1257 // The following can be improved, but not that much.
1258 SDValue Tmp1, Tmp2, Tmp3;
1259 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1260 LHSHi, RHSHi, ISD::SETOEQ);
1261 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1262 LHSLo, RHSLo, CCCode);
1263 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1264 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1265 LHSHi, RHSHi, ISD::SETUNE);
1266 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1267 LHSHi, RHSHi, CCCode);
1268 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1269 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1270 NewRHS = SDValue(); // LHS is the result, not a compare.
1273 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1274 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1275 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1276 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1278 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1279 // against zero to select between true and false values.
1280 if (NewRHS.getNode() == 0) {
1281 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1282 CCCode = ISD::SETNE;
1285 // Update N to have the operands specified.
1286 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1287 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1291 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1292 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1293 "Logic only correct for ppcf128!");
1295 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1296 // Round it the rest of the way (e.g. to f32) if needed.
1297 return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1298 N->getValueType(0), Hi, N->getOperand(1));
1301 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1302 MVT RVT = N->getValueType(0);
1303 DebugLoc dl = N->getDebugLoc();
1305 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1306 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1307 if (RVT == MVT::i32) {
1308 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1309 "Logic only correct for ppcf128!");
1310 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1311 N->getOperand(0), DAG.getValueType(MVT::f64));
1312 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1313 DAG.getIntPtrConstant(1));
1314 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1317 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1318 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1319 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1322 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1323 MVT RVT = N->getValueType(0);
1324 DebugLoc dl = N->getDebugLoc();
1326 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1327 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1328 if (RVT == MVT::i32) {
1329 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1330 "Logic only correct for ppcf128!");
1331 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1332 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1333 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1334 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1335 // FIXME: generated code sucks.
1336 return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1337 DAG.getNode(ISD::ADD, dl, MVT::i32,
1338 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1339 DAG.getNode(ISD::FSUB, dl,
1343 DAG.getConstant(0x80000000, MVT::i32)),
1344 DAG.getNode(ISD::FP_TO_SINT, dl,
1345 MVT::i32, N->getOperand(0)),
1346 DAG.getCondCode(ISD::SETGE));
1349 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1350 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1351 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1354 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1355 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1356 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1357 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1359 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1360 // against zero to select between true and false values.
1361 if (NewRHS.getNode() == 0) {
1362 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1363 CCCode = ISD::SETNE;
1366 // Update N to have the operands specified.
1367 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1368 N->getOperand(2), N->getOperand(3),
1369 DAG.getCondCode(CCCode));
1372 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1373 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1374 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1375 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1377 // If ExpandSetCCOperands returned a scalar, use it.
1378 if (NewRHS.getNode() == 0) {
1379 assert(NewLHS.getValueType() == N->getValueType(0) &&
1380 "Unexpected setcc expansion!");
1384 // Otherwise, update N to have the operands specified.
1385 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1386 DAG.getCondCode(CCCode));
1389 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1390 if (ISD::isNormalStore(N))
1391 return ExpandOp_NormalStore(N, OpNo);
1393 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1394 assert(OpNo == 1 && "Can only expand the stored value so far");
1395 StoreSDNode *ST = cast<StoreSDNode>(N);
1397 SDValue Chain = ST->getChain();
1398 SDValue Ptr = ST->getBasePtr();
1400 MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType());
1401 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1402 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1405 GetExpandedOp(ST->getValue(), Lo, Hi);
1407 return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1408 ST->getSrcValue(), ST->getSrcValueOffset(),
1410 ST->isVolatile(), ST->getAlignment());