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::FABS: R = SoftenFloatRes_FABS(N); break;
63 case ISD::FADD: R = SoftenFloatRes_FADD(N); break;
64 case ISD::FCEIL: R = SoftenFloatRes_FCEIL(N); break;
65 case ISD::FCOPYSIGN: R = SoftenFloatRes_FCOPYSIGN(N); break;
66 case ISD::FCOS: R = SoftenFloatRes_FCOS(N); break;
67 case ISD::FDIV: R = SoftenFloatRes_FDIV(N); break;
68 case ISD::FEXP: R = SoftenFloatRes_FEXP(N); break;
69 case ISD::FEXP2: R = SoftenFloatRes_FEXP2(N); break;
70 case ISD::FFLOOR: R = SoftenFloatRes_FFLOOR(N); break;
71 case ISD::FLOG: R = SoftenFloatRes_FLOG(N); break;
72 case ISD::FLOG2: R = SoftenFloatRes_FLOG2(N); break;
73 case ISD::FLOG10: R = SoftenFloatRes_FLOG10(N); break;
74 case ISD::FMUL: R = SoftenFloatRes_FMUL(N); break;
75 case ISD::FNEARBYINT: R = SoftenFloatRes_FNEARBYINT(N); break;
76 case ISD::FNEG: R = SoftenFloatRes_FNEG(N); break;
77 case ISD::FP_EXTEND: R = SoftenFloatRes_FP_EXTEND(N); break;
78 case ISD::FP_ROUND: R = SoftenFloatRes_FP_ROUND(N); break;
79 case ISD::FPOW: R = SoftenFloatRes_FPOW(N); break;
80 case ISD::FPOWI: R = SoftenFloatRes_FPOWI(N); break;
81 case ISD::FRINT: R = SoftenFloatRes_FRINT(N); break;
82 case ISD::FSIN: R = SoftenFloatRes_FSIN(N); break;
83 case ISD::FSQRT: R = SoftenFloatRes_FSQRT(N); break;
84 case ISD::FSUB: R = SoftenFloatRes_FSUB(N); break;
85 case ISD::FTRUNC: R = SoftenFloatRes_FTRUNC(N); break;
86 case ISD::LOAD: R = SoftenFloatRes_LOAD(N); break;
87 case ISD::SELECT: R = SoftenFloatRes_SELECT(N); break;
88 case ISD::SELECT_CC: R = SoftenFloatRes_SELECT_CC(N); break;
90 case ISD::UINT_TO_FP: R = SoftenFloatRes_XINT_TO_FP(N); break;
91 case ISD::VAARG: R = SoftenFloatRes_VAARG(N); break;
94 // If R is null, the sub-method took care of registering the result.
96 SetSoftenedFloat(SDValue(N, ResNo), R);
99 SDValue DAGTypeLegalizer::SoftenFloatRes_BIT_CONVERT(SDNode *N) {
100 return BitConvertToInteger(N->getOperand(0));
103 SDValue DAGTypeLegalizer::SoftenFloatRes_BUILD_PAIR(SDNode *N) {
104 // Convert the inputs to integers, and build a new pair out of them.
105 return DAG.getNode(ISD::BUILD_PAIR, N->getDebugLoc(),
106 TLI.getTypeToTransformTo(N->getValueType(0)),
107 BitConvertToInteger(N->getOperand(0)),
108 BitConvertToInteger(N->getOperand(1)));
111 SDValue DAGTypeLegalizer::SoftenFloatRes_ConstantFP(ConstantFPSDNode *N) {
112 return DAG.getConstant(N->getValueAPF().bitcastToAPInt(),
113 TLI.getTypeToTransformTo(N->getValueType(0)));
116 SDValue DAGTypeLegalizer::SoftenFloatRes_FABS(SDNode *N) {
117 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
118 unsigned Size = NVT.getSizeInBits();
120 // Mask = ~(1 << (Size-1))
121 SDValue Mask = DAG.getConstant(APInt::getAllOnesValue(Size).clear(Size-1),
123 SDValue Op = GetSoftenedFloat(N->getOperand(0));
124 return DAG.getNode(ISD::AND, N->getDebugLoc(), NVT, Op, Mask);
127 SDValue DAGTypeLegalizer::SoftenFloatRes_FADD(SDNode *N) {
128 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
129 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
130 GetSoftenedFloat(N->getOperand(1)) };
131 return MakeLibCall(GetFPLibCall(N->getValueType(0),
136 NVT, Ops, 2, false, N->getDebugLoc());
139 SDValue DAGTypeLegalizer::SoftenFloatRes_FCEIL(SDNode *N) {
140 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
141 SDValue Op = GetSoftenedFloat(N->getOperand(0));
142 return MakeLibCall(GetFPLibCall(N->getValueType(0),
146 RTLIB::CEIL_PPCF128),
147 NVT, &Op, 1, false, N->getDebugLoc());
150 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOPYSIGN(SDNode *N) {
151 SDValue LHS = GetSoftenedFloat(N->getOperand(0));
152 SDValue RHS = BitConvertToInteger(N->getOperand(1));
153 DebugLoc dl = N->getDebugLoc();
155 MVT LVT = LHS.getValueType();
156 MVT RVT = RHS.getValueType();
158 unsigned LSize = LVT.getSizeInBits();
159 unsigned RSize = RVT.getSizeInBits();
161 // First get the sign bit of second operand.
162 SDValue SignBit = DAG.getNode(ISD::SHL, dl, RVT, DAG.getConstant(1, RVT),
163 DAG.getConstant(RSize - 1,
164 TLI.getShiftAmountTy()));
165 SignBit = DAG.getNode(ISD::AND, dl, RVT, RHS, SignBit);
167 // Shift right or sign-extend it if the two operands have different types.
168 int SizeDiff = RVT.getSizeInBits() - LVT.getSizeInBits();
170 SignBit = DAG.getNode(ISD::SRL, dl, RVT, SignBit,
171 DAG.getConstant(SizeDiff, TLI.getShiftAmountTy()));
172 SignBit = DAG.getNode(ISD::TRUNCATE, dl, LVT, SignBit);
173 } else if (SizeDiff < 0) {
174 SignBit = DAG.getNode(ISD::ANY_EXTEND, dl, LVT, SignBit);
175 SignBit = DAG.getNode(ISD::SHL, dl, LVT, SignBit,
176 DAG.getConstant(-SizeDiff, TLI.getShiftAmountTy()));
179 // Clear the sign bit of the first operand.
180 SDValue Mask = DAG.getNode(ISD::SHL, dl, LVT, DAG.getConstant(1, LVT),
181 DAG.getConstant(LSize - 1,
182 TLI.getShiftAmountTy()));
183 Mask = DAG.getNode(ISD::SUB, dl, LVT, Mask, DAG.getConstant(1, LVT));
184 LHS = DAG.getNode(ISD::AND, dl, LVT, LHS, Mask);
186 // Or the value with the sign bit.
187 return DAG.getNode(ISD::OR, dl, LVT, LHS, SignBit);
190 SDValue DAGTypeLegalizer::SoftenFloatRes_FCOS(SDNode *N) {
191 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
192 SDValue Op = GetSoftenedFloat(N->getOperand(0));
193 return MakeLibCall(GetFPLibCall(N->getValueType(0),
198 NVT, &Op, 1, false, N->getDebugLoc());
201 SDValue DAGTypeLegalizer::SoftenFloatRes_FDIV(SDNode *N) {
202 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
203 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
204 GetSoftenedFloat(N->getOperand(1)) };
205 return MakeLibCall(GetFPLibCall(N->getValueType(0),
210 NVT, Ops, 2, false, N->getDebugLoc());
213 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP(SDNode *N) {
214 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
215 SDValue Op = GetSoftenedFloat(N->getOperand(0));
216 return MakeLibCall(GetFPLibCall(N->getValueType(0),
221 NVT, &Op, 1, false, N->getDebugLoc());
224 SDValue DAGTypeLegalizer::SoftenFloatRes_FEXP2(SDNode *N) {
225 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
226 SDValue Op = GetSoftenedFloat(N->getOperand(0));
227 return MakeLibCall(GetFPLibCall(N->getValueType(0),
231 RTLIB::EXP2_PPCF128),
232 NVT, &Op, 1, false, N->getDebugLoc());
235 SDValue DAGTypeLegalizer::SoftenFloatRes_FFLOOR(SDNode *N) {
236 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
237 SDValue Op = GetSoftenedFloat(N->getOperand(0));
238 return MakeLibCall(GetFPLibCall(N->getValueType(0),
242 RTLIB::FLOOR_PPCF128),
243 NVT, &Op, 1, false, N->getDebugLoc());
246 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG(SDNode *N) {
247 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
248 SDValue Op = GetSoftenedFloat(N->getOperand(0));
249 return MakeLibCall(GetFPLibCall(N->getValueType(0),
254 NVT, &Op, 1, false, N->getDebugLoc());
257 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG2(SDNode *N) {
258 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
259 SDValue Op = GetSoftenedFloat(N->getOperand(0));
260 return MakeLibCall(GetFPLibCall(N->getValueType(0),
264 RTLIB::LOG2_PPCF128),
265 NVT, &Op, 1, false, N->getDebugLoc());
268 SDValue DAGTypeLegalizer::SoftenFloatRes_FLOG10(SDNode *N) {
269 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
270 SDValue Op = GetSoftenedFloat(N->getOperand(0));
271 return MakeLibCall(GetFPLibCall(N->getValueType(0),
275 RTLIB::LOG10_PPCF128),
276 NVT, &Op, 1, false, N->getDebugLoc());
279 SDValue DAGTypeLegalizer::SoftenFloatRes_FMUL(SDNode *N) {
280 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
281 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
282 GetSoftenedFloat(N->getOperand(1)) };
283 return MakeLibCall(GetFPLibCall(N->getValueType(0),
288 NVT, Ops, 2, false, N->getDebugLoc());
291 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEARBYINT(SDNode *N) {
292 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
293 SDValue Op = GetSoftenedFloat(N->getOperand(0));
294 return MakeLibCall(GetFPLibCall(N->getValueType(0),
295 RTLIB::NEARBYINT_F32,
296 RTLIB::NEARBYINT_F64,
297 RTLIB::NEARBYINT_F80,
298 RTLIB::NEARBYINT_PPCF128),
299 NVT, &Op, 1, false, N->getDebugLoc());
302 SDValue DAGTypeLegalizer::SoftenFloatRes_FNEG(SDNode *N) {
303 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
304 // Expand Y = FNEG(X) -> Y = SUB -0.0, X
305 SDValue Ops[2] = { DAG.getConstantFP(-0.0, N->getValueType(0)),
306 GetSoftenedFloat(N->getOperand(0)) };
307 return MakeLibCall(GetFPLibCall(N->getValueType(0),
312 NVT, Ops, 2, false, N->getDebugLoc());
315 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_EXTEND(SDNode *N) {
316 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
317 SDValue Op = N->getOperand(0);
318 RTLIB::Libcall LC = RTLIB::getFPEXT(Op.getValueType(), N->getValueType(0));
319 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_EXTEND!");
320 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
323 SDValue DAGTypeLegalizer::SoftenFloatRes_FP_ROUND(SDNode *N) {
324 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
325 SDValue Op = N->getOperand(0);
326 RTLIB::Libcall LC = RTLIB::getFPROUND(Op.getValueType(), N->getValueType(0));
327 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND!");
328 return MakeLibCall(LC, NVT, &Op, 1, false, N->getDebugLoc());
331 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOW(SDNode *N) {
332 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
333 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
334 GetSoftenedFloat(N->getOperand(1)) };
335 return MakeLibCall(GetFPLibCall(N->getValueType(0),
340 NVT, Ops, 2, false, N->getDebugLoc());
343 SDValue DAGTypeLegalizer::SoftenFloatRes_FPOWI(SDNode *N) {
344 assert(N->getOperand(1).getValueType() == MVT::i32 &&
345 "Unsupported power type!");
346 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
347 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)), N->getOperand(1) };
348 return MakeLibCall(GetFPLibCall(N->getValueType(0),
352 RTLIB::POWI_PPCF128),
353 NVT, Ops, 2, false, N->getDebugLoc());
356 SDValue DAGTypeLegalizer::SoftenFloatRes_FRINT(SDNode *N) {
357 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
358 SDValue Op = GetSoftenedFloat(N->getOperand(0));
359 return MakeLibCall(GetFPLibCall(N->getValueType(0),
363 RTLIB::RINT_PPCF128),
364 NVT, &Op, 1, false, N->getDebugLoc());
367 SDValue DAGTypeLegalizer::SoftenFloatRes_FSIN(SDNode *N) {
368 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
369 SDValue Op = GetSoftenedFloat(N->getOperand(0));
370 return MakeLibCall(GetFPLibCall(N->getValueType(0),
375 NVT, &Op, 1, false, N->getDebugLoc());
378 SDValue DAGTypeLegalizer::SoftenFloatRes_FSQRT(SDNode *N) {
379 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
380 SDValue Op = GetSoftenedFloat(N->getOperand(0));
381 return MakeLibCall(GetFPLibCall(N->getValueType(0),
385 RTLIB::SQRT_PPCF128),
386 NVT, &Op, 1, false, N->getDebugLoc());
389 SDValue DAGTypeLegalizer::SoftenFloatRes_FSUB(SDNode *N) {
390 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
391 SDValue Ops[2] = { GetSoftenedFloat(N->getOperand(0)),
392 GetSoftenedFloat(N->getOperand(1)) };
393 return MakeLibCall(GetFPLibCall(N->getValueType(0),
398 NVT, Ops, 2, false, N->getDebugLoc());
401 SDValue DAGTypeLegalizer::SoftenFloatRes_FTRUNC(SDNode *N) {
402 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
403 SDValue Op = GetSoftenedFloat(N->getOperand(0));
404 return MakeLibCall(GetFPLibCall(N->getValueType(0),
408 RTLIB::TRUNC_PPCF128),
409 NVT, &Op, 1, false, N->getDebugLoc());
412 SDValue DAGTypeLegalizer::SoftenFloatRes_LOAD(SDNode *N) {
413 LoadSDNode *L = cast<LoadSDNode>(N);
414 MVT VT = N->getValueType(0);
415 MVT NVT = TLI.getTypeToTransformTo(VT);
416 DebugLoc dl = N->getDebugLoc();
419 if (L->getExtensionType() == ISD::NON_EXTLOAD) {
420 NewL = DAG.getLoad(L->getAddressingMode(), dl, L->getExtensionType(),
421 NVT, L->getChain(), L->getBasePtr(), L->getOffset(),
422 L->getSrcValue(), L->getSrcValueOffset(), NVT,
423 L->isVolatile(), L->getAlignment());
424 // Legalized the chain result - switch anything that used the old chain to
426 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
430 // Do a non-extending load followed by FP_EXTEND.
431 NewL = DAG.getLoad(L->getAddressingMode(), dl, ISD::NON_EXTLOAD,
432 L->getMemoryVT(), L->getChain(),
433 L->getBasePtr(), L->getOffset(),
434 L->getSrcValue(), L->getSrcValueOffset(),
436 L->isVolatile(), L->getAlignment());
437 // Legalized the chain result - switch anything that used the old chain to
439 ReplaceValueWith(SDValue(N, 1), NewL.getValue(1));
440 return BitConvertToInteger(DAG.getNode(ISD::FP_EXTEND, dl, VT, NewL));
443 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT(SDNode *N) {
444 SDValue LHS = GetSoftenedFloat(N->getOperand(1));
445 SDValue RHS = GetSoftenedFloat(N->getOperand(2));
446 return DAG.getNode(ISD::SELECT, N->getDebugLoc(),
447 LHS.getValueType(), N->getOperand(0),LHS,RHS);
450 SDValue DAGTypeLegalizer::SoftenFloatRes_SELECT_CC(SDNode *N) {
451 SDValue LHS = GetSoftenedFloat(N->getOperand(2));
452 SDValue RHS = GetSoftenedFloat(N->getOperand(3));
453 return DAG.getNode(ISD::SELECT_CC, N->getDebugLoc(),
454 LHS.getValueType(), N->getOperand(0),
455 N->getOperand(1), LHS, RHS, N->getOperand(4));
458 SDValue DAGTypeLegalizer::SoftenFloatRes_VAARG(SDNode *N) {
459 SDValue Chain = N->getOperand(0); // Get the chain.
460 SDValue Ptr = N->getOperand(1); // Get the pointer.
461 MVT VT = N->getValueType(0);
462 MVT NVT = TLI.getTypeToTransformTo(VT);
463 DebugLoc dl = N->getDebugLoc();
466 NewVAARG = DAG.getVAArg(NVT, dl, Chain, Ptr, N->getOperand(2));
468 // Legalized the chain result - switch anything that used the old chain to
470 ReplaceValueWith(SDValue(N, 1), NewVAARG.getValue(1));
474 SDValue DAGTypeLegalizer::SoftenFloatRes_XINT_TO_FP(SDNode *N) {
475 bool Signed = N->getOpcode() == ISD::SINT_TO_FP;
476 MVT SVT = N->getOperand(0).getValueType();
477 MVT RVT = N->getValueType(0);
479 DebugLoc dl = N->getDebugLoc();
481 // If the input is not legal, eg: i1 -> fp, then it needs to be promoted to
482 // a larger type, eg: i8 -> fp. Even if it is legal, no libcall may exactly
483 // match. Look for an appropriate libcall.
484 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
485 for (unsigned t = MVT::FIRST_INTEGER_VALUETYPE;
486 t <= MVT::LAST_INTEGER_VALUETYPE && LC == RTLIB::UNKNOWN_LIBCALL; ++t) {
487 NVT = (MVT::SimpleValueType)t;
488 // The source needs to big enough to hold the operand.
490 LC = Signed ? RTLIB::getSINTTOFP(NVT, RVT):RTLIB::getUINTTOFP (NVT, RVT);
492 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
494 // Sign/zero extend the argument if the libcall takes a larger type.
495 SDValue Op = DAG.getNode(Signed ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
496 NVT, N->getOperand(0));
497 return MakeLibCall(LC, TLI.getTypeToTransformTo(RVT), &Op, 1, false, dl);
501 //===----------------------------------------------------------------------===//
502 // Operand Float to Integer Conversion..
503 //===----------------------------------------------------------------------===//
505 bool DAGTypeLegalizer::SoftenFloatOperand(SDNode *N, unsigned OpNo) {
506 DEBUG(cerr << "Soften float operand " << OpNo << ": "; N->dump(&DAG);
508 SDValue Res = SDValue();
510 switch (N->getOpcode()) {
513 cerr << "SoftenFloatOperand Op #" << OpNo << ": ";
514 N->dump(&DAG); cerr << "\n";
516 assert(0 && "Do not know how to soften this operator's operand!");
519 case ISD::BIT_CONVERT: Res = SoftenFloatOp_BIT_CONVERT(N); break;
520 case ISD::BR_CC: Res = SoftenFloatOp_BR_CC(N); break;
521 case ISD::FP_ROUND: Res = SoftenFloatOp_FP_ROUND(N); break;
522 case ISD::FP_TO_SINT: Res = SoftenFloatOp_FP_TO_SINT(N); break;
523 case ISD::FP_TO_UINT: Res = SoftenFloatOp_FP_TO_UINT(N); break;
524 case ISD::SELECT_CC: Res = SoftenFloatOp_SELECT_CC(N); break;
525 case ISD::SETCC: Res = SoftenFloatOp_SETCC(N); break;
526 case ISD::STORE: Res = SoftenFloatOp_STORE(N, OpNo); break;
529 // If the result is null, the sub-method took care of registering results etc.
530 if (!Res.getNode()) return false;
532 // If the result is N, the sub-method updated N in place. Tell the legalizer
534 if (Res.getNode() == N)
537 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
538 "Invalid operand expansion");
540 ReplaceValueWith(SDValue(N, 0), Res);
544 /// SoftenSetCCOperands - Soften the operands of a comparison. This code is
545 /// shared among BR_CC, SELECT_CC, and SETCC handlers.
546 void DAGTypeLegalizer::SoftenSetCCOperands(SDValue &NewLHS, SDValue &NewRHS,
547 ISD::CondCode &CCCode, DebugLoc dl) {
548 SDValue LHSInt = GetSoftenedFloat(NewLHS);
549 SDValue RHSInt = GetSoftenedFloat(NewRHS);
550 MVT VT = NewLHS.getValueType();
552 assert((VT == MVT::f32 || VT == MVT::f64) && "Unsupported setcc type!");
554 // Expand into one or more soft-fp libcall(s).
555 RTLIB::Libcall LC1 = RTLIB::UNKNOWN_LIBCALL, LC2 = RTLIB::UNKNOWN_LIBCALL;
559 LC1 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
563 LC1 = (VT == MVT::f32) ? RTLIB::UNE_F32 : RTLIB::UNE_F64;
567 LC1 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
571 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
575 LC1 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
579 LC1 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
582 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
585 LC1 = (VT == MVT::f32) ? RTLIB::O_F32 : RTLIB::O_F64;
588 LC1 = (VT == MVT::f32) ? RTLIB::UO_F32 : RTLIB::UO_F64;
591 // SETONE = SETOLT | SETOGT
592 LC1 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
595 LC2 = (VT == MVT::f32) ? RTLIB::OGT_F32 : RTLIB::OGT_F64;
598 LC2 = (VT == MVT::f32) ? RTLIB::OGE_F32 : RTLIB::OGE_F64;
601 LC2 = (VT == MVT::f32) ? RTLIB::OLT_F32 : RTLIB::OLT_F64;
604 LC2 = (VT == MVT::f32) ? RTLIB::OLE_F32 : RTLIB::OLE_F64;
607 LC2 = (VT == MVT::f32) ? RTLIB::OEQ_F32 : RTLIB::OEQ_F64;
609 default: assert(false && "Do not know how to soften this setcc!");
613 MVT RetVT = MVT::i32; // FIXME: is this the correct return type?
614 SDValue Ops[2] = { LHSInt, RHSInt };
615 NewLHS = MakeLibCall(LC1, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
616 NewRHS = DAG.getConstant(0, RetVT);
617 CCCode = TLI.getCmpLibcallCC(LC1);
618 if (LC2 != RTLIB::UNKNOWN_LIBCALL) {
619 SDValue Tmp = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT),
620 NewLHS, NewRHS, DAG.getCondCode(CCCode));
621 NewLHS = MakeLibCall(LC2, RetVT, Ops, 2, false/*sign irrelevant*/, dl);
622 NewLHS = DAG.getNode(ISD::SETCC, dl, TLI.getSetCCResultType(RetVT), NewLHS,
623 NewRHS, DAG.getCondCode(TLI.getCmpLibcallCC(LC2)));
624 NewLHS = DAG.getNode(ISD::OR, dl, Tmp.getValueType(), Tmp, NewLHS);
629 SDValue DAGTypeLegalizer::SoftenFloatOp_BIT_CONVERT(SDNode *N) {
630 return DAG.getNode(ISD::BIT_CONVERT, N->getDebugLoc(), N->getValueType(0),
631 GetSoftenedFloat(N->getOperand(0)));
634 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_ROUND(SDNode *N) {
635 MVT SVT = N->getOperand(0).getValueType();
636 MVT RVT = N->getValueType(0);
638 RTLIB::Libcall LC = RTLIB::getFPROUND(SVT, RVT);
639 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_ROUND libcall");
641 SDValue Op = GetSoftenedFloat(N->getOperand(0));
642 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
645 SDValue DAGTypeLegalizer::SoftenFloatOp_BR_CC(SDNode *N) {
646 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
647 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
648 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
650 // If SoftenSetCCOperands returned a scalar, we need to compare the result
651 // against zero to select between true and false values.
652 if (NewRHS.getNode() == 0) {
653 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
657 // Update N to have the operands specified.
658 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
659 DAG.getCondCode(CCCode), NewLHS, NewRHS,
663 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_SINT(SDNode *N) {
664 MVT RVT = N->getValueType(0);
665 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
666 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
667 SDValue Op = GetSoftenedFloat(N->getOperand(0));
668 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
671 SDValue DAGTypeLegalizer::SoftenFloatOp_FP_TO_UINT(SDNode *N) {
672 MVT RVT = N->getValueType(0);
673 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
674 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
675 SDValue Op = GetSoftenedFloat(N->getOperand(0));
676 return MakeLibCall(LC, RVT, &Op, 1, false, N->getDebugLoc());
679 SDValue DAGTypeLegalizer::SoftenFloatOp_SELECT_CC(SDNode *N) {
680 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
681 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
682 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
684 // If SoftenSetCCOperands returned a scalar, we need to compare the result
685 // against zero to select between true and false values.
686 if (NewRHS.getNode() == 0) {
687 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
691 // Update N to have the operands specified.
692 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
693 N->getOperand(2), N->getOperand(3),
694 DAG.getCondCode(CCCode));
697 SDValue DAGTypeLegalizer::SoftenFloatOp_SETCC(SDNode *N) {
698 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
699 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
700 SoftenSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
702 // If SoftenSetCCOperands returned a scalar, use it.
703 if (NewRHS.getNode() == 0) {
704 assert(NewLHS.getValueType() == N->getValueType(0) &&
705 "Unexpected setcc expansion!");
709 // Otherwise, update N to have the operands specified.
710 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
711 DAG.getCondCode(CCCode));
714 SDValue DAGTypeLegalizer::SoftenFloatOp_STORE(SDNode *N, unsigned OpNo) {
715 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
716 assert(OpNo == 1 && "Can only soften the stored value!");
717 StoreSDNode *ST = cast<StoreSDNode>(N);
718 SDValue Val = ST->getValue();
719 DebugLoc dl = N->getDebugLoc();
721 if (ST->isTruncatingStore())
722 // Do an FP_ROUND followed by a non-truncating store.
723 Val = BitConvertToInteger(DAG.getNode(ISD::FP_ROUND, dl, ST->getMemoryVT(),
724 Val, DAG.getIntPtrConstant(0)));
726 Val = GetSoftenedFloat(Val);
728 return DAG.getStore(ST->getChain(), dl, Val, ST->getBasePtr(),
729 ST->getSrcValue(), ST->getSrcValueOffset(),
730 ST->isVolatile(), ST->getAlignment());
734 //===----------------------------------------------------------------------===//
735 // Float Result Expansion
736 //===----------------------------------------------------------------------===//
738 /// ExpandFloatResult - This method is called when the specified result of the
739 /// specified node is found to need expansion. At this point, the node may also
740 /// have invalid operands or may have other results that need promotion, we just
741 /// know that (at least) one result needs expansion.
742 void DAGTypeLegalizer::ExpandFloatResult(SDNode *N, unsigned ResNo) {
743 DEBUG(cerr << "Expand float result: "; N->dump(&DAG); cerr << "\n");
747 // See if the target wants to custom expand this node.
748 if (CustomLowerResults(N, N->getValueType(ResNo), true))
751 switch (N->getOpcode()) {
754 cerr << "ExpandFloatResult #" << ResNo << ": ";
755 N->dump(&DAG); cerr << "\n";
757 assert(0 && "Do not know how to expand the result of this operator!");
760 case ISD::MERGE_VALUES: SplitRes_MERGE_VALUES(N, Lo, Hi); break;
761 case ISD::UNDEF: SplitRes_UNDEF(N, Lo, Hi); break;
762 case ISD::SELECT: SplitRes_SELECT(N, Lo, Hi); break;
763 case ISD::SELECT_CC: SplitRes_SELECT_CC(N, Lo, Hi); break;
765 case ISD::BIT_CONVERT: ExpandRes_BIT_CONVERT(N, Lo, Hi); break;
766 case ISD::BUILD_PAIR: ExpandRes_BUILD_PAIR(N, Lo, Hi); break;
767 case ISD::EXTRACT_ELEMENT: ExpandRes_EXTRACT_ELEMENT(N, Lo, Hi); break;
768 case ISD::EXTRACT_VECTOR_ELT: ExpandRes_EXTRACT_VECTOR_ELT(N, Lo, Hi); break;
769 case ISD::VAARG: ExpandRes_VAARG(N, Lo, Hi); break;
771 case ISD::ConstantFP: ExpandFloatRes_ConstantFP(N, Lo, Hi); break;
772 case ISD::FABS: ExpandFloatRes_FABS(N, Lo, Hi); break;
773 case ISD::FADD: ExpandFloatRes_FADD(N, Lo, Hi); break;
774 case ISD::FCEIL: ExpandFloatRes_FCEIL(N, Lo, Hi); break;
775 case ISD::FCOS: ExpandFloatRes_FCOS(N, Lo, Hi); break;
776 case ISD::FDIV: ExpandFloatRes_FDIV(N, Lo, Hi); break;
777 case ISD::FEXP: ExpandFloatRes_FEXP(N, Lo, Hi); break;
778 case ISD::FEXP2: ExpandFloatRes_FEXP2(N, Lo, Hi); break;
779 case ISD::FFLOOR: ExpandFloatRes_FFLOOR(N, Lo, Hi); break;
780 case ISD::FLOG: ExpandFloatRes_FLOG(N, Lo, Hi); break;
781 case ISD::FLOG2: ExpandFloatRes_FLOG2(N, Lo, Hi); break;
782 case ISD::FLOG10: ExpandFloatRes_FLOG10(N, Lo, Hi); break;
783 case ISD::FMUL: ExpandFloatRes_FMUL(N, Lo, Hi); break;
784 case ISD::FNEARBYINT: ExpandFloatRes_FNEARBYINT(N, Lo, Hi); break;
785 case ISD::FNEG: ExpandFloatRes_FNEG(N, Lo, Hi); break;
786 case ISD::FP_EXTEND: ExpandFloatRes_FP_EXTEND(N, Lo, Hi); break;
787 case ISD::FPOW: ExpandFloatRes_FPOW(N, Lo, Hi); break;
788 case ISD::FPOWI: ExpandFloatRes_FPOWI(N, Lo, Hi); break;
789 case ISD::FRINT: ExpandFloatRes_FRINT(N, Lo, Hi); break;
790 case ISD::FSIN: ExpandFloatRes_FSIN(N, Lo, Hi); break;
791 case ISD::FSQRT: ExpandFloatRes_FSQRT(N, Lo, Hi); break;
792 case ISD::FSUB: ExpandFloatRes_FSUB(N, Lo, Hi); break;
793 case ISD::FTRUNC: ExpandFloatRes_FTRUNC(N, Lo, Hi); break;
794 case ISD::LOAD: ExpandFloatRes_LOAD(N, Lo, Hi); break;
795 case ISD::SINT_TO_FP:
796 case ISD::UINT_TO_FP: ExpandFloatRes_XINT_TO_FP(N, Lo, Hi); break;
799 // If Lo/Hi is null, the sub-method took care of registering results etc.
801 SetExpandedFloat(SDValue(N, ResNo), Lo, Hi);
804 void DAGTypeLegalizer::ExpandFloatRes_ConstantFP(SDNode *N, SDValue &Lo,
806 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
807 assert(NVT.getSizeInBits() == integerPartWidth &&
808 "Do not know how to expand this float constant!");
809 APInt C = cast<ConstantFPSDNode>(N)->getValueAPF().bitcastToAPInt();
810 Lo = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
811 &C.getRawData()[1])), NVT);
812 Hi = DAG.getConstantFP(APFloat(APInt(integerPartWidth, 1,
813 &C.getRawData()[0])), NVT);
816 void DAGTypeLegalizer::ExpandFloatRes_FABS(SDNode *N, SDValue &Lo,
818 assert(N->getValueType(0) == MVT::ppcf128 &&
819 "Logic only correct for ppcf128!");
820 DebugLoc dl = N->getDebugLoc();
822 GetExpandedFloat(N->getOperand(0), Lo, Tmp);
823 Hi = DAG.getNode(ISD::FABS, dl, Tmp.getValueType(), Tmp);
824 // Lo = Hi==fabs(Hi) ? Lo : -Lo;
825 Lo = DAG.getNode(ISD::SELECT_CC, dl, Lo.getValueType(), Tmp, Hi, Lo,
826 DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo),
827 DAG.getCondCode(ISD::SETEQ));
830 void DAGTypeLegalizer::ExpandFloatRes_FADD(SDNode *N, SDValue &Lo,
832 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
833 RTLIB::ADD_F32, RTLIB::ADD_F64,
834 RTLIB::ADD_F80, RTLIB::ADD_PPCF128),
836 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
837 "Call lowered wrongly!");
838 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
841 void DAGTypeLegalizer::ExpandFloatRes_FCEIL(SDNode *N,
842 SDValue &Lo, SDValue &Hi) {
843 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
844 RTLIB::CEIL_F32, RTLIB::CEIL_F64,
845 RTLIB::CEIL_F80, RTLIB::CEIL_PPCF128),
847 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
848 "Call lowered wrongly!");
849 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
852 void DAGTypeLegalizer::ExpandFloatRes_FCOS(SDNode *N,
853 SDValue &Lo, SDValue &Hi) {
854 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
855 RTLIB::COS_F32, RTLIB::COS_F64,
856 RTLIB::COS_F80, RTLIB::COS_PPCF128),
858 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
859 "Call lowered wrongly!");
860 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
863 void DAGTypeLegalizer::ExpandFloatRes_FDIV(SDNode *N, SDValue &Lo,
865 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
866 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
871 N->getValueType(0), Ops, 2, false,
873 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
874 "Call lowered wrongly!");
875 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
878 void DAGTypeLegalizer::ExpandFloatRes_FEXP(SDNode *N,
879 SDValue &Lo, SDValue &Hi) {
880 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
881 RTLIB::EXP_F32, RTLIB::EXP_F64,
882 RTLIB::EXP_F80, RTLIB::EXP_PPCF128),
884 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
885 "Call lowered wrongly!");
886 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
889 void DAGTypeLegalizer::ExpandFloatRes_FEXP2(SDNode *N,
890 SDValue &Lo, SDValue &Hi) {
891 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
892 RTLIB::EXP2_F32, RTLIB::EXP2_F64,
893 RTLIB::EXP2_F80, RTLIB::EXP2_PPCF128),
895 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
896 "Call lowered wrongly!");
897 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
900 void DAGTypeLegalizer::ExpandFloatRes_FFLOOR(SDNode *N,
901 SDValue &Lo, SDValue &Hi) {
902 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
903 RTLIB::FLOOR_F32,RTLIB::FLOOR_F64,
904 RTLIB::FLOOR_F80,RTLIB::FLOOR_PPCF128),
906 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
907 "Call lowered wrongly!");
908 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
911 void DAGTypeLegalizer::ExpandFloatRes_FLOG(SDNode *N,
912 SDValue &Lo, SDValue &Hi) {
913 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
914 RTLIB::LOG_F32, RTLIB::LOG_F64,
915 RTLIB::LOG_F80, RTLIB::LOG_PPCF128),
917 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
918 "Call lowered wrongly!");
919 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
922 void DAGTypeLegalizer::ExpandFloatRes_FLOG2(SDNode *N,
923 SDValue &Lo, SDValue &Hi) {
924 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
925 RTLIB::LOG2_F32, RTLIB::LOG2_F64,
926 RTLIB::LOG2_F80, RTLIB::LOG2_PPCF128),
928 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
929 "Call lowered wrongly!");
930 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
933 void DAGTypeLegalizer::ExpandFloatRes_FLOG10(SDNode *N,
934 SDValue &Lo, SDValue &Hi) {
935 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
936 RTLIB::LOG10_F32,RTLIB::LOG10_F64,
937 RTLIB::LOG10_F80,RTLIB::LOG10_PPCF128),
939 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
940 "Call lowered wrongly!");
941 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
944 void DAGTypeLegalizer::ExpandFloatRes_FMUL(SDNode *N, SDValue &Lo,
946 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
947 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
952 N->getValueType(0), Ops, 2, false,
954 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
955 "Call lowered wrongly!");
956 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
959 void DAGTypeLegalizer::ExpandFloatRes_FNEARBYINT(SDNode *N,
960 SDValue &Lo, SDValue &Hi) {
961 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
962 RTLIB::NEARBYINT_F32,
963 RTLIB::NEARBYINT_F64,
964 RTLIB::NEARBYINT_F80,
965 RTLIB::NEARBYINT_PPCF128),
967 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
968 "Call lowered wrongly!");
969 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
972 void DAGTypeLegalizer::ExpandFloatRes_FNEG(SDNode *N, SDValue &Lo,
974 DebugLoc dl = N->getDebugLoc();
975 GetExpandedFloat(N->getOperand(0), Lo, Hi);
976 Lo = DAG.getNode(ISD::FNEG, dl, Lo.getValueType(), Lo);
977 Hi = DAG.getNode(ISD::FNEG, dl, Hi.getValueType(), Hi);
980 void DAGTypeLegalizer::ExpandFloatRes_FP_EXTEND(SDNode *N, SDValue &Lo,
982 MVT NVT = TLI.getTypeToTransformTo(N->getValueType(0));
983 Hi = DAG.getNode(ISD::FP_EXTEND, N->getDebugLoc(), NVT, N->getOperand(0));
984 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
987 void DAGTypeLegalizer::ExpandFloatRes_FPOW(SDNode *N,
988 SDValue &Lo, SDValue &Hi) {
989 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
990 RTLIB::POW_F32, RTLIB::POW_F64,
991 RTLIB::POW_F80, RTLIB::POW_PPCF128),
993 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
994 "Call lowered wrongly!");
995 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
998 void DAGTypeLegalizer::ExpandFloatRes_FPOWI(SDNode *N,
999 SDValue &Lo, SDValue &Hi) {
1000 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1001 RTLIB::POWI_F32, RTLIB::POWI_F64,
1002 RTLIB::POWI_F80, RTLIB::POWI_PPCF128),
1004 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1005 "Call lowered wrongly!");
1006 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1009 void DAGTypeLegalizer::ExpandFloatRes_FRINT(SDNode *N,
1010 SDValue &Lo, SDValue &Hi) {
1011 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1012 RTLIB::RINT_F32, RTLIB::RINT_F64,
1013 RTLIB::RINT_F80, RTLIB::RINT_PPCF128),
1015 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1016 "Call lowered wrongly!");
1017 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1020 void DAGTypeLegalizer::ExpandFloatRes_FSIN(SDNode *N,
1021 SDValue &Lo, SDValue &Hi) {
1022 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1023 RTLIB::SIN_F32, RTLIB::SIN_F64,
1024 RTLIB::SIN_F80, RTLIB::SIN_PPCF128),
1026 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1027 "Call lowered wrongly!");
1028 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1031 void DAGTypeLegalizer::ExpandFloatRes_FSQRT(SDNode *N,
1032 SDValue &Lo, SDValue &Hi) {
1033 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1034 RTLIB::SQRT_F32, RTLIB::SQRT_F64,
1035 RTLIB::SQRT_F80, RTLIB::SQRT_PPCF128),
1037 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1038 "Call lowered wrongly!");
1039 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1042 void DAGTypeLegalizer::ExpandFloatRes_FSUB(SDNode *N, SDValue &Lo,
1044 SDValue Ops[2] = { N->getOperand(0), N->getOperand(1) };
1045 SDValue Call = MakeLibCall(GetFPLibCall(N->getValueType(0),
1049 RTLIB::SUB_PPCF128),
1050 N->getValueType(0), Ops, 2, false,
1052 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1053 "Call lowered wrongly!");
1054 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1057 void DAGTypeLegalizer::ExpandFloatRes_FTRUNC(SDNode *N,
1058 SDValue &Lo, SDValue &Hi) {
1059 SDValue Call = LibCallify(GetFPLibCall(N->getValueType(0),
1060 RTLIB::TRUNC_F32, RTLIB::TRUNC_F64,
1061 RTLIB::TRUNC_F80, RTLIB::TRUNC_PPCF128),
1063 assert(Call.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1064 "Call lowered wrongly!");
1065 Lo = Call.getOperand(0); Hi = Call.getOperand(1);
1068 void DAGTypeLegalizer::ExpandFloatRes_LOAD(SDNode *N, SDValue &Lo,
1070 if (ISD::isNormalLoad(N)) {
1071 ExpandRes_NormalLoad(N, Lo, Hi);
1075 assert(ISD::isUNINDEXEDLoad(N) && "Indexed load during type legalization!");
1076 LoadSDNode *LD = cast<LoadSDNode>(N);
1077 SDValue Chain = LD->getChain();
1078 SDValue Ptr = LD->getBasePtr();
1079 DebugLoc dl = N->getDebugLoc();
1081 MVT NVT = TLI.getTypeToTransformTo(LD->getValueType(0));
1082 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1083 assert(LD->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1085 Hi = DAG.getExtLoad(LD->getExtensionType(), dl, NVT, Chain, Ptr,
1086 LD->getSrcValue(), LD->getSrcValueOffset(),
1088 LD->isVolatile(), LD->getAlignment());
1090 // Remember the chain.
1091 Chain = Hi.getValue(1);
1093 // The low part is zero.
1094 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1096 // Modified the chain - switch anything that used the old chain to use the
1098 ReplaceValueWith(SDValue(LD, 1), Chain);
1101 void DAGTypeLegalizer::ExpandFloatRes_XINT_TO_FP(SDNode *N, SDValue &Lo,
1103 assert(N->getValueType(0) == MVT::ppcf128 && "Unsupported XINT_TO_FP!");
1104 MVT VT = N->getValueType(0);
1105 MVT NVT = TLI.getTypeToTransformTo(VT);
1106 SDValue Src = N->getOperand(0);
1107 MVT SrcVT = Src.getValueType();
1108 bool isSigned = N->getOpcode() == ISD::SINT_TO_FP;
1109 DebugLoc dl = N->getDebugLoc();
1111 // First do an SINT_TO_FP, whether the original was signed or unsigned.
1112 // When promoting partial word types to i32 we must honor the signedness,
1114 if (SrcVT.bitsLE(MVT::i32)) {
1115 // The integer can be represented exactly in an f64.
1116 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1118 Lo = DAG.getConstantFP(APFloat(APInt(NVT.getSizeInBits(), 0)), NVT);
1119 Hi = DAG.getNode(ISD::SINT_TO_FP, dl, NVT, Src);
1121 RTLIB::Libcall LC = RTLIB::UNKNOWN_LIBCALL;
1122 if (SrcVT.bitsLE(MVT::i64)) {
1123 Src = DAG.getNode(isSigned ? ISD::SIGN_EXTEND : ISD::ZERO_EXTEND, dl,
1125 LC = RTLIB::SINTTOFP_I64_PPCF128;
1126 } else if (SrcVT.bitsLE(MVT::i128)) {
1127 Src = DAG.getNode(ISD::SIGN_EXTEND, dl, MVT::i128, Src);
1128 LC = RTLIB::SINTTOFP_I128_PPCF128;
1130 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported XINT_TO_FP!");
1132 Hi = MakeLibCall(LC, VT, &Src, 1, true, dl);
1133 assert(Hi.getNode()->getOpcode() == ISD::BUILD_PAIR &&
1134 "Call lowered wrongly!");
1135 Lo = Hi.getOperand(0); Hi = Hi.getOperand(1);
1141 // Unsigned - fix up the SINT_TO_FP value just calculated.
1142 Hi = DAG.getNode(ISD::BUILD_PAIR, dl, VT, Lo, Hi);
1143 SrcVT = Src.getValueType();
1145 // x>=0 ? (ppcf128)(iN)x : (ppcf128)(iN)x + 2^N; N=32,64,128.
1146 static const uint64_t TwoE32[] = { 0x41f0000000000000LL, 0 };
1147 static const uint64_t TwoE64[] = { 0x43f0000000000000LL, 0 };
1148 static const uint64_t TwoE128[] = { 0x47f0000000000000LL, 0 };
1149 const uint64_t *Parts = 0;
1151 switch (SrcVT.getSimpleVT()) {
1153 assert(false && "Unsupported UINT_TO_FP!");
1165 Lo = DAG.getNode(ISD::FADD, dl, VT, Hi,
1166 DAG.getConstantFP(APFloat(APInt(128, 2, Parts)),
1168 Lo = DAG.getNode(ISD::SELECT_CC, dl, VT, Src, DAG.getConstant(0, SrcVT),
1169 Lo, Hi, DAG.getCondCode(ISD::SETLT));
1170 Hi = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Lo, DAG.getIntPtrConstant(1));
1171 Lo = DAG.getNode(ISD::EXTRACT_ELEMENT, dl, NVT, Lo, DAG.getIntPtrConstant(0));
1175 //===----------------------------------------------------------------------===//
1176 // Float Operand Expansion
1177 //===----------------------------------------------------------------------===//
1179 /// ExpandFloatOperand - This method is called when the specified operand of the
1180 /// specified node is found to need expansion. At this point, all of the result
1181 /// types of the node are known to be legal, but other operands of the node may
1182 /// need promotion or expansion as well as the specified one.
1183 bool DAGTypeLegalizer::ExpandFloatOperand(SDNode *N, unsigned OpNo) {
1184 DEBUG(cerr << "Expand float operand: "; N->dump(&DAG); cerr << "\n");
1185 SDValue Res = SDValue();
1187 if (TLI.getOperationAction(N->getOpcode(), N->getOperand(OpNo).getValueType())
1188 == TargetLowering::Custom)
1189 Res = TLI.LowerOperation(SDValue(N, 0), DAG);
1191 if (Res.getNode() == 0) {
1192 switch (N->getOpcode()) {
1195 cerr << "ExpandFloatOperand Op #" << OpNo << ": ";
1196 N->dump(&DAG); cerr << "\n";
1198 assert(0 && "Do not know how to expand this operator's operand!");
1201 case ISD::BIT_CONVERT: Res = ExpandOp_BIT_CONVERT(N); break;
1202 case ISD::BUILD_VECTOR: Res = ExpandOp_BUILD_VECTOR(N); break;
1203 case ISD::EXTRACT_ELEMENT: Res = ExpandOp_EXTRACT_ELEMENT(N); break;
1205 case ISD::BR_CC: Res = ExpandFloatOp_BR_CC(N); break;
1206 case ISD::FP_ROUND: Res = ExpandFloatOp_FP_ROUND(N); break;
1207 case ISD::FP_TO_SINT: Res = ExpandFloatOp_FP_TO_SINT(N); break;
1208 case ISD::FP_TO_UINT: Res = ExpandFloatOp_FP_TO_UINT(N); break;
1209 case ISD::SELECT_CC: Res = ExpandFloatOp_SELECT_CC(N); break;
1210 case ISD::SETCC: Res = ExpandFloatOp_SETCC(N); break;
1211 case ISD::STORE: Res = ExpandFloatOp_STORE(cast<StoreSDNode>(N),
1216 // If the result is null, the sub-method took care of registering results etc.
1217 if (!Res.getNode()) return false;
1219 // If the result is N, the sub-method updated N in place. Tell the legalizer
1221 if (Res.getNode() == N)
1224 assert(Res.getValueType() == N->getValueType(0) && N->getNumValues() == 1 &&
1225 "Invalid operand expansion");
1227 ReplaceValueWith(SDValue(N, 0), Res);
1231 /// FloatExpandSetCCOperands - Expand the operands of a comparison. This code
1232 /// is shared among BR_CC, SELECT_CC, and SETCC handlers.
1233 void DAGTypeLegalizer::FloatExpandSetCCOperands(SDValue &NewLHS,
1235 ISD::CondCode &CCCode,
1237 SDValue LHSLo, LHSHi, RHSLo, RHSHi;
1238 GetExpandedFloat(NewLHS, LHSLo, LHSHi);
1239 GetExpandedFloat(NewRHS, RHSLo, RHSHi);
1241 MVT VT = NewLHS.getValueType();
1242 assert(VT == MVT::ppcf128 && "Unsupported setcc type!");
1244 // FIXME: This generated code sucks. We want to generate
1245 // FCMPU crN, hi1, hi2
1247 // FCMPU crN, lo1, lo2
1248 // The following can be improved, but not that much.
1249 SDValue Tmp1, Tmp2, Tmp3;
1250 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1251 LHSHi, RHSHi, ISD::SETOEQ);
1252 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSLo.getValueType()),
1253 LHSLo, RHSLo, CCCode);
1254 Tmp3 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1255 Tmp1 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1256 LHSHi, RHSHi, ISD::SETUNE);
1257 Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(LHSHi.getValueType()),
1258 LHSHi, RHSHi, CCCode);
1259 Tmp1 = DAG.getNode(ISD::AND, dl, Tmp1.getValueType(), Tmp1, Tmp2);
1260 NewLHS = DAG.getNode(ISD::OR, dl, Tmp1.getValueType(), Tmp1, Tmp3);
1261 NewRHS = SDValue(); // LHS is the result, not a compare.
1264 SDValue DAGTypeLegalizer::ExpandFloatOp_BR_CC(SDNode *N) {
1265 SDValue NewLHS = N->getOperand(2), NewRHS = N->getOperand(3);
1266 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(1))->get();
1267 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1269 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1270 // against zero to select between true and false values.
1271 if (NewRHS.getNode() == 0) {
1272 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1273 CCCode = ISD::SETNE;
1276 // Update N to have the operands specified.
1277 return DAG.UpdateNodeOperands(SDValue(N, 0), N->getOperand(0),
1278 DAG.getCondCode(CCCode), NewLHS, NewRHS,
1282 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_ROUND(SDNode *N) {
1283 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1284 "Logic only correct for ppcf128!");
1286 GetExpandedFloat(N->getOperand(0), Lo, Hi);
1287 // Round it the rest of the way (e.g. to f32) if needed.
1288 return DAG.getNode(ISD::FP_ROUND, N->getDebugLoc(),
1289 N->getValueType(0), Hi, N->getOperand(1));
1292 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_SINT(SDNode *N) {
1293 MVT RVT = N->getValueType(0);
1294 DebugLoc dl = N->getDebugLoc();
1296 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1297 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1298 if (RVT == MVT::i32) {
1299 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1300 "Logic only correct for ppcf128!");
1301 SDValue Res = DAG.getNode(ISD::FP_ROUND_INREG, dl, MVT::ppcf128,
1302 N->getOperand(0), DAG.getValueType(MVT::f64));
1303 Res = DAG.getNode(ISD::FP_ROUND, dl, MVT::f64, Res,
1304 DAG.getIntPtrConstant(1));
1305 return DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32, Res);
1308 RTLIB::Libcall LC = RTLIB::getFPTOSINT(N->getOperand(0).getValueType(), RVT);
1309 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_SINT!");
1310 return MakeLibCall(LC, RVT, &N->getOperand(0), 1, false, dl);
1313 SDValue DAGTypeLegalizer::ExpandFloatOp_FP_TO_UINT(SDNode *N) {
1314 MVT RVT = N->getValueType(0);
1315 DebugLoc dl = N->getDebugLoc();
1317 // Expand ppcf128 to i32 by hand for the benefit of llvm-gcc bootstrap on
1318 // PPC (the libcall is not available). FIXME: Do this in a less hacky way.
1319 if (RVT == MVT::i32) {
1320 assert(N->getOperand(0).getValueType() == MVT::ppcf128 &&
1321 "Logic only correct for ppcf128!");
1322 const uint64_t TwoE31[] = {0x41e0000000000000LL, 0};
1323 APFloat APF = APFloat(APInt(128, 2, TwoE31));
1324 SDValue Tmp = DAG.getConstantFP(APF, MVT::ppcf128);
1325 // X>=2^31 ? (int)(X-2^31)+0x80000000 : (int)X
1326 // FIXME: generated code sucks.
1327 return DAG.getNode(ISD::SELECT_CC, dl, MVT::i32, N->getOperand(0), Tmp,
1328 DAG.getNode(ISD::ADD, dl, MVT::i32,
1329 DAG.getNode(ISD::FP_TO_SINT, dl, MVT::i32,
1330 DAG.getNode(ISD::FSUB, dl,
1334 DAG.getConstant(0x80000000, MVT::i32)),
1335 DAG.getNode(ISD::FP_TO_SINT, dl,
1336 MVT::i32, N->getOperand(0)),
1337 DAG.getCondCode(ISD::SETGE));
1340 RTLIB::Libcall LC = RTLIB::getFPTOUINT(N->getOperand(0).getValueType(), RVT);
1341 assert(LC != RTLIB::UNKNOWN_LIBCALL && "Unsupported FP_TO_UINT!");
1342 return MakeLibCall(LC, N->getValueType(0), &N->getOperand(0), 1, false, dl);
1345 SDValue DAGTypeLegalizer::ExpandFloatOp_SELECT_CC(SDNode *N) {
1346 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1347 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(4))->get();
1348 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1350 // If ExpandSetCCOperands returned a scalar, we need to compare the result
1351 // against zero to select between true and false values.
1352 if (NewRHS.getNode() == 0) {
1353 NewRHS = DAG.getConstant(0, NewLHS.getValueType());
1354 CCCode = ISD::SETNE;
1357 // Update N to have the operands specified.
1358 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1359 N->getOperand(2), N->getOperand(3),
1360 DAG.getCondCode(CCCode));
1363 SDValue DAGTypeLegalizer::ExpandFloatOp_SETCC(SDNode *N) {
1364 SDValue NewLHS = N->getOperand(0), NewRHS = N->getOperand(1);
1365 ISD::CondCode CCCode = cast<CondCodeSDNode>(N->getOperand(2))->get();
1366 FloatExpandSetCCOperands(NewLHS, NewRHS, CCCode, N->getDebugLoc());
1368 // If ExpandSetCCOperands returned a scalar, use it.
1369 if (NewRHS.getNode() == 0) {
1370 assert(NewLHS.getValueType() == N->getValueType(0) &&
1371 "Unexpected setcc expansion!");
1375 // Otherwise, update N to have the operands specified.
1376 return DAG.UpdateNodeOperands(SDValue(N, 0), NewLHS, NewRHS,
1377 DAG.getCondCode(CCCode));
1380 SDValue DAGTypeLegalizer::ExpandFloatOp_STORE(SDNode *N, unsigned OpNo) {
1381 if (ISD::isNormalStore(N))
1382 return ExpandOp_NormalStore(N, OpNo);
1384 assert(ISD::isUNINDEXEDStore(N) && "Indexed store during type legalization!");
1385 assert(OpNo == 1 && "Can only expand the stored value so far");
1386 StoreSDNode *ST = cast<StoreSDNode>(N);
1388 SDValue Chain = ST->getChain();
1389 SDValue Ptr = ST->getBasePtr();
1391 MVT NVT = TLI.getTypeToTransformTo(ST->getValue().getValueType());
1392 assert(NVT.isByteSized() && "Expanded type not byte sized!");
1393 assert(ST->getMemoryVT().bitsLE(NVT) && "Float type not round?");
1396 GetExpandedOp(ST->getValue(), Lo, Hi);
1398 return DAG.getTruncStore(Chain, N->getDebugLoc(), Hi, Ptr,
1399 ST->getSrcValue(), ST->getSrcValueOffset(),
1401 ST->isVolatile(), ST->getAlignment());