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Tom Stellardf98f2ce2012-12-11 21:25:42 +00001//===-- AMDGPUISelLowering.cpp - AMDGPU Common DAG lowering functions -----===//
2//
3// The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10/// \file
11/// \brief This is the parent TargetLowering class for hardware code gen
12/// targets.
13//
14//===----------------------------------------------------------------------===//
15
16#include "AMDGPUISelLowering.h"
Tom Stellarde7397ee2013-06-03 17:40:11 +000017#include "AMDGPU.h"
Christian Konig90c64cb2013-03-07 09:03:52 +000018#include "AMDGPURegisterInfo.h"
Christian Konig90c64cb2013-03-07 09:03:52 +000019#include "AMDGPUSubtarget.h"
Benjamin Kramer5c352902013-05-23 17:10:37 +000020#include "AMDILIntrinsicInfo.h"
Tom Stellardf502c292013-07-23 01:48:05 +000021#include "R600MachineFunctionInfo.h"
Tom Stellarde7397ee2013-06-03 17:40:11 +000022#include "SIMachineFunctionInfo.h"
Christian Konig90c64cb2013-03-07 09:03:52 +000023#include "llvm/CodeGen/CallingConvLower.h"
Tom Stellardf98f2ce2012-12-11 21:25:42 +000024#include "llvm/CodeGen/MachineFunction.h"
25#include "llvm/CodeGen/MachineRegisterInfo.h"
26#include "llvm/CodeGen/SelectionDAG.h"
27#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
Tom Stellarde3d4cbc2013-06-28 15:47:08 +000028#include "llvm/IR/DataLayout.h"
Tom Stellardf98f2ce2012-12-11 21:25:42 +000029
30using namespace llvm;
31
Christian Konig90c64cb2013-03-07 09:03:52 +000032#include "AMDGPUGenCallingConv.inc"
33
Tom Stellardf98f2ce2012-12-11 21:25:42 +000034AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM) :
35 TargetLowering(TM, new TargetLoweringObjectFileELF()) {
36
37 // Initialize target lowering borrowed from AMDIL
38 InitAMDILLowering();
39
40 // We need to custom lower some of the intrinsics
41 setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
42
43 // Library functions. These default to Expand, but we have instructions
44 // for them.
45 setOperationAction(ISD::FCEIL, MVT::f32, Legal);
46 setOperationAction(ISD::FEXP2, MVT::f32, Legal);
47 setOperationAction(ISD::FPOW, MVT::f32, Legal);
48 setOperationAction(ISD::FLOG2, MVT::f32, Legal);
49 setOperationAction(ISD::FABS, MVT::f32, Legal);
50 setOperationAction(ISD::FFLOOR, MVT::f32, Legal);
51 setOperationAction(ISD::FRINT, MVT::f32, Legal);
52
Tom Stellardba534c22013-05-20 15:02:19 +000053 // The hardware supports ROTR, but not ROTL
54 setOperationAction(ISD::ROTL, MVT::i32, Expand);
55
Tom Stellardf98f2ce2012-12-11 21:25:42 +000056 // Lower floating point store/load to integer store/load to reduce the number
57 // of patterns in tablegen.
58 setOperationAction(ISD::STORE, MVT::f32, Promote);
59 AddPromotedToType(ISD::STORE, MVT::f32, MVT::i32);
60
Tom Stellardfc047272013-07-18 21:43:42 +000061 setOperationAction(ISD::STORE, MVT::v2f32, Promote);
62 AddPromotedToType(ISD::STORE, MVT::v2f32, MVT::v2i32);
63
Tom Stellardf98f2ce2012-12-11 21:25:42 +000064 setOperationAction(ISD::STORE, MVT::v4f32, Promote);
65 AddPromotedToType(ISD::STORE, MVT::v4f32, MVT::v4i32);
66
Tom Stellard68e13282013-07-12 18:14:56 +000067 setOperationAction(ISD::STORE, MVT::f64, Promote);
68 AddPromotedToType(ISD::STORE, MVT::f64, MVT::i64);
69
Tom Stellardf98f2ce2012-12-11 21:25:42 +000070 setOperationAction(ISD::LOAD, MVT::f32, Promote);
71 AddPromotedToType(ISD::LOAD, MVT::f32, MVT::i32);
72
Tom Stellardac85f3f2013-07-18 21:43:48 +000073 setOperationAction(ISD::LOAD, MVT::v2f32, Promote);
74 AddPromotedToType(ISD::LOAD, MVT::v2f32, MVT::v2i32);
75
Tom Stellardf98f2ce2012-12-11 21:25:42 +000076 setOperationAction(ISD::LOAD, MVT::v4f32, Promote);
77 AddPromotedToType(ISD::LOAD, MVT::v4f32, MVT::v4i32);
78
Tom Stellard68e13282013-07-12 18:14:56 +000079 setOperationAction(ISD::LOAD, MVT::f64, Promote);
80 AddPromotedToType(ISD::LOAD, MVT::f64, MVT::i64);
81
Tom Stellarda41520c2013-08-14 23:25:00 +000082 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4i32, Custom);
83 setOperationAction(ISD::CONCAT_VECTORS, MVT::v4f32, Custom);
84 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2i32, Custom);
85 setOperationAction(ISD::EXTRACT_SUBVECTOR, MVT::v2f32, Custom);
Tom Stellard692ee102013-08-01 15:23:42 +000086
Tom Stellardd7a472c2013-07-23 01:47:46 +000087 setOperationAction(ISD::FNEG, MVT::v2f32, Expand);
88 setOperationAction(ISD::FNEG, MVT::v4f32, Expand);
89
Christian Konig45b14e32013-03-27 09:12:51 +000090 setOperationAction(ISD::MUL, MVT::i64, Expand);
91
Tom Stellardf98f2ce2012-12-11 21:25:42 +000092 setOperationAction(ISD::UDIV, MVT::i32, Expand);
93 setOperationAction(ISD::UDIVREM, MVT::i32, Custom);
94 setOperationAction(ISD::UREM, MVT::i32, Expand);
Tom Stellardf5660aa2013-07-18 21:43:35 +000095 setOperationAction(ISD::VSELECT, MVT::v2f32, Expand);
96 setOperationAction(ISD::VSELECT, MVT::v4f32, Expand);
Aaron Watryf97c7fe2013-06-25 13:55:57 +000097
Craig Topper787e71d2013-07-15 06:39:13 +000098 static const int types[] = {
Aaron Watryf97c7fe2013-06-25 13:55:57 +000099 (int)MVT::v2i32,
100 (int)MVT::v4i32
101 };
Craig Topperb9df53a2013-07-15 04:27:47 +0000102 const size_t NumTypes = array_lengthof(types);
Aaron Watryf97c7fe2013-06-25 13:55:57 +0000103
104 for (unsigned int x = 0; x < NumTypes; ++x) {
105 MVT::SimpleValueType VT = (MVT::SimpleValueType)types[x];
106 //Expand the following operations for the current type by default
107 setOperationAction(ISD::ADD, VT, Expand);
108 setOperationAction(ISD::AND, VT, Expand);
Tom Stellarde3d60ac2013-07-30 14:31:03 +0000109 setOperationAction(ISD::FP_TO_SINT, VT, Expand);
110 setOperationAction(ISD::FP_TO_UINT, VT, Expand);
Aaron Watryf97c7fe2013-06-25 13:55:57 +0000111 setOperationAction(ISD::MUL, VT, Expand);
112 setOperationAction(ISD::OR, VT, Expand);
113 setOperationAction(ISD::SHL, VT, Expand);
Tom Stellarde3d60ac2013-07-30 14:31:03 +0000114 setOperationAction(ISD::SINT_TO_FP, VT, Expand);
Aaron Watryf97c7fe2013-06-25 13:55:57 +0000115 setOperationAction(ISD::SRL, VT, Expand);
116 setOperationAction(ISD::SRA, VT, Expand);
117 setOperationAction(ISD::SUB, VT, Expand);
118 setOperationAction(ISD::UDIV, VT, Expand);
Tom Stellarde3d60ac2013-07-30 14:31:03 +0000119 setOperationAction(ISD::UINT_TO_FP, VT, Expand);
Aaron Watryf97c7fe2013-06-25 13:55:57 +0000120 setOperationAction(ISD::UREM, VT, Expand);
Tom Stellardf5660aa2013-07-18 21:43:35 +0000121 setOperationAction(ISD::VSELECT, VT, Expand);
Aaron Watryf97c7fe2013-06-25 13:55:57 +0000122 setOperationAction(ISD::XOR, VT, Expand);
123 }
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000124}
125
Tom Stellard2b272a12013-08-05 22:22:07 +0000126//===----------------------------------------------------------------------===//
127// Target Information
128//===----------------------------------------------------------------------===//
129
130MVT AMDGPUTargetLowering::getVectorIdxTy() const {
131 return MVT::i32;
132}
133
134
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000135//===---------------------------------------------------------------------===//
Tom Stellard1f67c632013-07-23 23:55:03 +0000136// Target Properties
137//===---------------------------------------------------------------------===//
138
139bool AMDGPUTargetLowering::isFAbsFree(EVT VT) const {
140 assert(VT.isFloatingPoint());
141 return VT == MVT::f32;
142}
143
144bool AMDGPUTargetLowering::isFNegFree(EVT VT) const {
145 assert(VT.isFloatingPoint());
146 return VT == MVT::f32;
147}
148
149//===---------------------------------------------------------------------===//
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000150// TargetLowering Callbacks
151//===---------------------------------------------------------------------===//
152
Christian Konig90c64cb2013-03-07 09:03:52 +0000153void AMDGPUTargetLowering::AnalyzeFormalArguments(CCState &State,
154 const SmallVectorImpl<ISD::InputArg> &Ins) const {
155
156 State.AnalyzeFormalArguments(Ins, CC_AMDGPU);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000157}
158
159SDValue AMDGPUTargetLowering::LowerReturn(
160 SDValue Chain,
161 CallingConv::ID CallConv,
162 bool isVarArg,
163 const SmallVectorImpl<ISD::OutputArg> &Outs,
164 const SmallVectorImpl<SDValue> &OutVals,
Andrew Trickac6d9be2013-05-25 02:42:55 +0000165 SDLoc DL, SelectionDAG &DAG) const {
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000166 return DAG.getNode(AMDGPUISD::RET_FLAG, DL, MVT::Other, Chain);
167}
168
169//===---------------------------------------------------------------------===//
170// Target specific lowering
171//===---------------------------------------------------------------------===//
172
173SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op, SelectionDAG &DAG)
174 const {
175 switch (Op.getOpcode()) {
176 default:
177 Op.getNode()->dump();
178 assert(0 && "Custom lowering code for this"
179 "instruction is not implemented yet!");
180 break;
181 // AMDIL DAG lowering
182 case ISD::SDIV: return LowerSDIV(Op, DAG);
183 case ISD::SREM: return LowerSREM(Op, DAG);
184 case ISD::SIGN_EXTEND_INREG: return LowerSIGN_EXTEND_INREG(Op, DAG);
185 case ISD::BRCOND: return LowerBRCOND(Op, DAG);
186 // AMDGPU DAG lowering
Tom Stellarda41520c2013-08-14 23:25:00 +0000187 case ISD::CONCAT_VECTORS: return LowerCONCAT_VECTORS(Op, DAG);
188 case ISD::EXTRACT_SUBVECTOR: return LowerEXTRACT_SUBVECTOR(Op, DAG);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000189 case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG);
190 case ISD::UDIVREM: return LowerUDIVREM(Op, DAG);
191 }
192 return Op;
193}
194
Tom Stellarde3d4cbc2013-06-28 15:47:08 +0000195SDValue AMDGPUTargetLowering::LowerGlobalAddress(AMDGPUMachineFunction* MFI,
196 SDValue Op,
197 SelectionDAG &DAG) const {
198
199 const DataLayout *TD = getTargetMachine().getDataLayout();
200 GlobalAddressSDNode *G = cast<GlobalAddressSDNode>(Op);
201 // XXX: What does the value of G->getOffset() mean?
202 assert(G->getOffset() == 0 &&
203 "Do not know what to do with an non-zero offset");
204
205 unsigned Offset = MFI->LDSSize;
206 const GlobalValue *GV = G->getGlobal();
207 uint64_t Size = TD->getTypeAllocSize(GV->getType()->getElementType());
208
209 // XXX: Account for alignment?
210 MFI->LDSSize += Size;
211
Michel Danzera3e39dc2013-07-10 16:37:07 +0000212 return DAG.getConstant(Offset, TD->getPointerSize() == 8 ? MVT::i64 : MVT::i32);
Tom Stellarde3d4cbc2013-06-28 15:47:08 +0000213}
214
Tom Stellarda41520c2013-08-14 23:25:00 +0000215void AMDGPUTargetLowering::ExtractVectorElements(SDValue Op, SelectionDAG &DAG,
216 SmallVectorImpl<SDValue> &Args,
217 unsigned Start,
218 unsigned Count) const {
219 EVT VT = Op.getValueType();
220 for (unsigned i = Start, e = Start + Count; i != e; ++i) {
221 Args.push_back(DAG.getNode(ISD::EXTRACT_VECTOR_ELT, SDLoc(Op),
222 VT.getVectorElementType(),
223 Op, DAG.getConstant(i, MVT::i32)));
224 }
225}
226
227SDValue AMDGPUTargetLowering::LowerCONCAT_VECTORS(SDValue Op,
228 SelectionDAG &DAG) const {
229 SmallVector<SDValue, 8> Args;
230 SDValue A = Op.getOperand(0);
231 SDValue B = Op.getOperand(1);
232
233 ExtractVectorElements(A, DAG, Args, 0,
234 A.getValueType().getVectorNumElements());
235 ExtractVectorElements(B, DAG, Args, 0,
236 B.getValueType().getVectorNumElements());
237
238 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(),
239 &Args[0], Args.size());
240}
241
242SDValue AMDGPUTargetLowering::LowerEXTRACT_SUBVECTOR(SDValue Op,
243 SelectionDAG &DAG) const {
244
245 SmallVector<SDValue, 8> Args;
246 EVT VT = Op.getValueType();
247 unsigned Start = cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
248 ExtractVectorElements(Op.getOperand(0), DAG, Args, Start,
249 VT.getVectorNumElements());
250
251 return DAG.getNode(ISD::BUILD_VECTOR, SDLoc(Op), Op.getValueType(),
252 &Args[0], Args.size());
253}
254
255
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000256SDValue AMDGPUTargetLowering::LowerINTRINSIC_WO_CHAIN(SDValue Op,
257 SelectionDAG &DAG) const {
258 unsigned IntrinsicID = cast<ConstantSDNode>(Op.getOperand(0))->getZExtValue();
Andrew Trickac6d9be2013-05-25 02:42:55 +0000259 SDLoc DL(Op);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000260 EVT VT = Op.getValueType();
261
262 switch (IntrinsicID) {
263 default: return Op;
264 case AMDGPUIntrinsic::AMDIL_abs:
265 return LowerIntrinsicIABS(Op, DAG);
266 case AMDGPUIntrinsic::AMDIL_exp:
267 return DAG.getNode(ISD::FEXP2, DL, VT, Op.getOperand(1));
268 case AMDGPUIntrinsic::AMDGPU_lrp:
269 return LowerIntrinsicLRP(Op, DAG);
270 case AMDGPUIntrinsic::AMDIL_fraction:
271 return DAG.getNode(AMDGPUISD::FRACT, DL, VT, Op.getOperand(1));
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000272 case AMDGPUIntrinsic::AMDIL_max:
273 return DAG.getNode(AMDGPUISD::FMAX, DL, VT, Op.getOperand(1),
274 Op.getOperand(2));
275 case AMDGPUIntrinsic::AMDGPU_imax:
276 return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Op.getOperand(1),
277 Op.getOperand(2));
278 case AMDGPUIntrinsic::AMDGPU_umax:
279 return DAG.getNode(AMDGPUISD::UMAX, DL, VT, Op.getOperand(1),
280 Op.getOperand(2));
281 case AMDGPUIntrinsic::AMDIL_min:
282 return DAG.getNode(AMDGPUISD::FMIN, DL, VT, Op.getOperand(1),
283 Op.getOperand(2));
284 case AMDGPUIntrinsic::AMDGPU_imin:
285 return DAG.getNode(AMDGPUISD::SMIN, DL, VT, Op.getOperand(1),
286 Op.getOperand(2));
287 case AMDGPUIntrinsic::AMDGPU_umin:
288 return DAG.getNode(AMDGPUISD::UMIN, DL, VT, Op.getOperand(1),
289 Op.getOperand(2));
290 case AMDGPUIntrinsic::AMDIL_round_nearest:
291 return DAG.getNode(ISD::FRINT, DL, VT, Op.getOperand(1));
292 }
293}
294
295///IABS(a) = SMAX(sub(0, a), a)
296SDValue AMDGPUTargetLowering::LowerIntrinsicIABS(SDValue Op,
297 SelectionDAG &DAG) const {
298
Andrew Trickac6d9be2013-05-25 02:42:55 +0000299 SDLoc DL(Op);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000300 EVT VT = Op.getValueType();
301 SDValue Neg = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
302 Op.getOperand(1));
303
304 return DAG.getNode(AMDGPUISD::SMAX, DL, VT, Neg, Op.getOperand(1));
305}
306
307/// Linear Interpolation
308/// LRP(a, b, c) = muladd(a, b, (1 - a) * c)
309SDValue AMDGPUTargetLowering::LowerIntrinsicLRP(SDValue Op,
310 SelectionDAG &DAG) const {
Andrew Trickac6d9be2013-05-25 02:42:55 +0000311 SDLoc DL(Op);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000312 EVT VT = Op.getValueType();
313 SDValue OneSubA = DAG.getNode(ISD::FSUB, DL, VT,
314 DAG.getConstantFP(1.0f, MVT::f32),
315 Op.getOperand(1));
316 SDValue OneSubAC = DAG.getNode(ISD::FMUL, DL, VT, OneSubA,
317 Op.getOperand(3));
Vincent Lejeunee3111962013-02-18 14:11:28 +0000318 return DAG.getNode(ISD::FADD, DL, VT,
319 DAG.getNode(ISD::FMUL, DL, VT, Op.getOperand(1), Op.getOperand(2)),
320 OneSubAC);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000321}
322
323/// \brief Generate Min/Max node
324SDValue AMDGPUTargetLowering::LowerMinMax(SDValue Op,
325 SelectionDAG &DAG) const {
Andrew Trickac6d9be2013-05-25 02:42:55 +0000326 SDLoc DL(Op);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000327 EVT VT = Op.getValueType();
328
329 SDValue LHS = Op.getOperand(0);
330 SDValue RHS = Op.getOperand(1);
331 SDValue True = Op.getOperand(2);
332 SDValue False = Op.getOperand(3);
333 SDValue CC = Op.getOperand(4);
334
335 if (VT != MVT::f32 ||
336 !((LHS == True && RHS == False) || (LHS == False && RHS == True))) {
337 return SDValue();
338 }
339
340 ISD::CondCode CCOpcode = cast<CondCodeSDNode>(CC)->get();
341 switch (CCOpcode) {
342 case ISD::SETOEQ:
343 case ISD::SETONE:
344 case ISD::SETUNE:
345 case ISD::SETNE:
346 case ISD::SETUEQ:
347 case ISD::SETEQ:
348 case ISD::SETFALSE:
349 case ISD::SETFALSE2:
350 case ISD::SETTRUE:
351 case ISD::SETTRUE2:
352 case ISD::SETUO:
353 case ISD::SETO:
354 assert(0 && "Operation should already be optimised !");
355 case ISD::SETULE:
356 case ISD::SETULT:
357 case ISD::SETOLE:
358 case ISD::SETOLT:
359 case ISD::SETLE:
360 case ISD::SETLT: {
361 if (LHS == True)
362 return DAG.getNode(AMDGPUISD::FMIN, DL, VT, LHS, RHS);
363 else
364 return DAG.getNode(AMDGPUISD::FMAX, DL, VT, LHS, RHS);
365 }
366 case ISD::SETGT:
367 case ISD::SETGE:
368 case ISD::SETUGE:
369 case ISD::SETOGE:
370 case ISD::SETUGT:
371 case ISD::SETOGT: {
372 if (LHS == True)
373 return DAG.getNode(AMDGPUISD::FMAX, DL, VT, LHS, RHS);
374 else
375 return DAG.getNode(AMDGPUISD::FMIN, DL, VT, LHS, RHS);
376 }
377 case ISD::SETCC_INVALID:
378 assert(0 && "Invalid setcc condcode !");
379 }
380 return Op;
381}
382
383
384
385SDValue AMDGPUTargetLowering::LowerUDIVREM(SDValue Op,
386 SelectionDAG &DAG) const {
Andrew Trickac6d9be2013-05-25 02:42:55 +0000387 SDLoc DL(Op);
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000388 EVT VT = Op.getValueType();
389
390 SDValue Num = Op.getOperand(0);
391 SDValue Den = Op.getOperand(1);
392
393 SmallVector<SDValue, 8> Results;
394
395 // RCP = URECIP(Den) = 2^32 / Den + e
396 // e is rounding error.
397 SDValue RCP = DAG.getNode(AMDGPUISD::URECIP, DL, VT, Den);
398
399 // RCP_LO = umulo(RCP, Den) */
400 SDValue RCP_LO = DAG.getNode(ISD::UMULO, DL, VT, RCP, Den);
401
402 // RCP_HI = mulhu (RCP, Den) */
403 SDValue RCP_HI = DAG.getNode(ISD::MULHU, DL, VT, RCP, Den);
404
405 // NEG_RCP_LO = -RCP_LO
406 SDValue NEG_RCP_LO = DAG.getNode(ISD::SUB, DL, VT, DAG.getConstant(0, VT),
407 RCP_LO);
408
409 // ABS_RCP_LO = (RCP_HI == 0 ? NEG_RCP_LO : RCP_LO)
410 SDValue ABS_RCP_LO = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
411 NEG_RCP_LO, RCP_LO,
412 ISD::SETEQ);
413 // Calculate the rounding error from the URECIP instruction
414 // E = mulhu(ABS_RCP_LO, RCP)
415 SDValue E = DAG.getNode(ISD::MULHU, DL, VT, ABS_RCP_LO, RCP);
416
417 // RCP_A_E = RCP + E
418 SDValue RCP_A_E = DAG.getNode(ISD::ADD, DL, VT, RCP, E);
419
420 // RCP_S_E = RCP - E
421 SDValue RCP_S_E = DAG.getNode(ISD::SUB, DL, VT, RCP, E);
422
423 // Tmp0 = (RCP_HI == 0 ? RCP_A_E : RCP_SUB_E)
424 SDValue Tmp0 = DAG.getSelectCC(DL, RCP_HI, DAG.getConstant(0, VT),
425 RCP_A_E, RCP_S_E,
426 ISD::SETEQ);
427 // Quotient = mulhu(Tmp0, Num)
428 SDValue Quotient = DAG.getNode(ISD::MULHU, DL, VT, Tmp0, Num);
429
430 // Num_S_Remainder = Quotient * Den
431 SDValue Num_S_Remainder = DAG.getNode(ISD::UMULO, DL, VT, Quotient, Den);
432
433 // Remainder = Num - Num_S_Remainder
434 SDValue Remainder = DAG.getNode(ISD::SUB, DL, VT, Num, Num_S_Remainder);
435
436 // Remainder_GE_Den = (Remainder >= Den ? -1 : 0)
437 SDValue Remainder_GE_Den = DAG.getSelectCC(DL, Remainder, Den,
438 DAG.getConstant(-1, VT),
439 DAG.getConstant(0, VT),
440 ISD::SETGE);
441 // Remainder_GE_Zero = (Remainder >= 0 ? -1 : 0)
442 SDValue Remainder_GE_Zero = DAG.getSelectCC(DL, Remainder,
443 DAG.getConstant(0, VT),
444 DAG.getConstant(-1, VT),
445 DAG.getConstant(0, VT),
446 ISD::SETGE);
447 // Tmp1 = Remainder_GE_Den & Remainder_GE_Zero
448 SDValue Tmp1 = DAG.getNode(ISD::AND, DL, VT, Remainder_GE_Den,
449 Remainder_GE_Zero);
450
451 // Calculate Division result:
452
453 // Quotient_A_One = Quotient + 1
454 SDValue Quotient_A_One = DAG.getNode(ISD::ADD, DL, VT, Quotient,
455 DAG.getConstant(1, VT));
456
457 // Quotient_S_One = Quotient - 1
458 SDValue Quotient_S_One = DAG.getNode(ISD::SUB, DL, VT, Quotient,
459 DAG.getConstant(1, VT));
460
461 // Div = (Tmp1 == 0 ? Quotient : Quotient_A_One)
462 SDValue Div = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
463 Quotient, Quotient_A_One, ISD::SETEQ);
464
465 // Div = (Remainder_GE_Zero == 0 ? Quotient_S_One : Div)
466 Div = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
467 Quotient_S_One, Div, ISD::SETEQ);
468
469 // Calculate Rem result:
470
471 // Remainder_S_Den = Remainder - Den
472 SDValue Remainder_S_Den = DAG.getNode(ISD::SUB, DL, VT, Remainder, Den);
473
474 // Remainder_A_Den = Remainder + Den
475 SDValue Remainder_A_Den = DAG.getNode(ISD::ADD, DL, VT, Remainder, Den);
476
477 // Rem = (Tmp1 == 0 ? Remainder : Remainder_S_Den)
478 SDValue Rem = DAG.getSelectCC(DL, Tmp1, DAG.getConstant(0, VT),
479 Remainder, Remainder_S_Den, ISD::SETEQ);
480
481 // Rem = (Remainder_GE_Zero == 0 ? Remainder_A_Den : Rem)
482 Rem = DAG.getSelectCC(DL, Remainder_GE_Zero, DAG.getConstant(0, VT),
483 Remainder_A_Den, Rem, ISD::SETEQ);
484 SDValue Ops[2];
485 Ops[0] = Div;
486 Ops[1] = Rem;
487 return DAG.getMergeValues(Ops, 2, DL);
488}
489
490//===----------------------------------------------------------------------===//
491// Helper functions
492//===----------------------------------------------------------------------===//
493
494bool AMDGPUTargetLowering::isHWTrueValue(SDValue Op) const {
495 if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
496 return CFP->isExactlyValue(1.0);
497 }
498 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
499 return C->isAllOnesValue();
500 }
501 return false;
502}
503
504bool AMDGPUTargetLowering::isHWFalseValue(SDValue Op) const {
505 if (ConstantFPSDNode * CFP = dyn_cast<ConstantFPSDNode>(Op)) {
506 return CFP->getValueAPF().isZero();
507 }
508 if (ConstantSDNode *C = dyn_cast<ConstantSDNode>(Op)) {
509 return C->isNullValue();
510 }
511 return false;
512}
513
514SDValue AMDGPUTargetLowering::CreateLiveInRegister(SelectionDAG &DAG,
515 const TargetRegisterClass *RC,
516 unsigned Reg, EVT VT) const {
517 MachineFunction &MF = DAG.getMachineFunction();
518 MachineRegisterInfo &MRI = MF.getRegInfo();
519 unsigned VirtualRegister;
520 if (!MRI.isLiveIn(Reg)) {
521 VirtualRegister = MRI.createVirtualRegister(RC);
522 MRI.addLiveIn(Reg, VirtualRegister);
523 } else {
524 VirtualRegister = MRI.getLiveInVirtReg(Reg);
525 }
526 return DAG.getRegister(VirtualRegister, VT);
527}
528
529#define NODE_NAME_CASE(node) case AMDGPUISD::node: return #node;
530
531const char* AMDGPUTargetLowering::getTargetNodeName(unsigned Opcode) const {
532 switch (Opcode) {
533 default: return 0;
534 // AMDIL DAG nodes
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000535 NODE_NAME_CASE(CALL);
536 NODE_NAME_CASE(UMUL);
537 NODE_NAME_CASE(DIV_INF);
538 NODE_NAME_CASE(RET_FLAG);
539 NODE_NAME_CASE(BRANCH_COND);
540
541 // AMDGPU DAG nodes
542 NODE_NAME_CASE(DWORDADDR)
543 NODE_NAME_CASE(FRACT)
544 NODE_NAME_CASE(FMAX)
545 NODE_NAME_CASE(SMAX)
546 NODE_NAME_CASE(UMAX)
547 NODE_NAME_CASE(FMIN)
548 NODE_NAME_CASE(SMIN)
549 NODE_NAME_CASE(UMIN)
550 NODE_NAME_CASE(URECIP)
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000551 NODE_NAME_CASE(EXPORT)
Tom Stellardc7e18882013-01-23 02:09:03 +0000552 NODE_NAME_CASE(CONST_ADDRESS)
Tom Stellardc0b0c672013-02-06 17:32:29 +0000553 NODE_NAME_CASE(REGISTER_LOAD)
554 NODE_NAME_CASE(REGISTER_STORE)
Tom Stellard68db37b2013-08-14 23:24:45 +0000555 NODE_NAME_CASE(LOAD_CONSTANT)
556 NODE_NAME_CASE(LOAD_INPUT)
557 NODE_NAME_CASE(SAMPLE)
558 NODE_NAME_CASE(SAMPLEB)
559 NODE_NAME_CASE(SAMPLED)
560 NODE_NAME_CASE(SAMPLEL)
Tom Stellardf98f2ce2012-12-11 21:25:42 +0000561 }
562}