1 //===-- AMDGPUSubtarget.cpp - AMDGPU Subtarget Information ----------------===//
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 Implements the AMDGPU specific subclass of TargetSubtarget.
12 //
13 //===----------------------------------------------------------------------===//
14
15 #include "AMDGPUSubtarget.h"
16 #include "R600InstrInfo.h"
17 #include "SIInstrInfo.h"
18
19 using namespace llvm;
20
21 #define DEBUG_TYPE "amdgpu-subtarget"
22
23 #define GET_SUBTARGETINFO_ENUM
24 #define GET_SUBTARGETINFO_TARGET_DESC
25 #define GET_SUBTARGETINFO_CTOR
26 #include "AMDGPUGenSubtargetInfo.inc"
27
AMDGPUSubtarget(StringRef TT,StringRef GPU,StringRef FS)28 AMDGPUSubtarget::AMDGPUSubtarget(StringRef TT, StringRef GPU, StringRef FS) :
29 AMDGPUGenSubtargetInfo(TT, GPU, FS),
30 DevName(GPU),
31 Is64bit(false),
32 DumpCode(false),
33 R600ALUInst(false),
34 HasVertexCache(false),
35 TexVTXClauseSize(0),
36 Gen(AMDGPUSubtarget::R600),
37 FP64(false),
38 CaymanISA(false),
39 EnableIRStructurizer(true),
40 EnableIfCvt(true),
41 WavefrontSize(0),
42 CFALUBug(false),
43 LocalMemorySize(0),
44 InstrItins(getInstrItineraryForCPU(GPU)) {
45 ParseSubtargetFeatures(GPU, FS);
46
47 if (getGeneration() <= AMDGPUSubtarget::NORTHERN_ISLANDS) {
48 InstrInfo.reset(new R600InstrInfo(*this));
49 } else {
50 InstrInfo.reset(new SIInstrInfo(*this));
51 }
52 }
53
getStackEntrySize() const54 unsigned AMDGPUSubtarget::getStackEntrySize() const {
55 assert(getGeneration() <= NORTHERN_ISLANDS);
56 switch(getWavefrontSize()) {
57 case 16:
58 return 8;
59 case 32:
60 return hasCaymanISA() ? 4 : 8;
61 case 64:
62 return 4;
63 default:
64 llvm_unreachable("Illegal wavefront size.");
65 }
66 }
67