1//===- NVPTXSubtarget.cpp - NVPTX 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// This file implements the NVPTX specific subclass of TargetSubtarget.
11//
12//===----------------------------------------------------------------------===//
13
14#include "NVPTXSubtarget.h"
15
16using namespace llvm;
17
18#define DEBUG_TYPE "nvptx-subtarget"
19
20#define GET_SUBTARGETINFO_ENUM
21#define GET_SUBTARGETINFO_TARGET_DESC
22#define GET_SUBTARGETINFO_CTOR
23#include "NVPTXGenSubtargetInfo.inc"
24
25// Pin the vtable to this file.
26void NVPTXSubtarget::anchor() {}
27
28static std::string computeDataLayout(bool is64Bit) {
29  std::string Ret = "e";
30
31  if (!is64Bit)
32    Ret += "-p:32:32";
33
34  Ret += "-i64:64-v16:16-v32:32-n16:32:64";
35
36  return Ret;
37}
38
39NVPTXSubtarget &NVPTXSubtarget::initializeSubtargetDependencies(StringRef CPU,
40                                                                StringRef FS) {
41    // Provide the default CPU if we don't have one.
42  if (CPU.empty() && FS.size())
43    llvm_unreachable("we are not using FeatureStr");
44  TargetName = CPU.empty() ? "sm_20" : CPU;
45
46  ParseSubtargetFeatures(TargetName, FS);
47
48  // Set default to PTX 3.2 (CUDA 5.5)
49  if (PTXVersion == 0) {
50    PTXVersion = 32;
51  }
52
53  return *this;
54}
55
56NVPTXSubtarget::NVPTXSubtarget(const std::string &TT, const std::string &CPU,
57                               const std::string &FS, const TargetMachine &TM,
58                               bool is64Bit)
59    : NVPTXGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit), PTXVersion(0),
60      SmVersion(20), DL(computeDataLayout(is64Bit)),
61      InstrInfo(initializeSubtargetDependencies(CPU, FS)),
62      TLInfo((NVPTXTargetMachine &)TM), TSInfo(&DL), FrameLowering(*this) {
63
64  Triple T(TT);
65
66  if (T.getOS() == Triple::NVCL)
67    drvInterface = NVPTX::NVCL;
68  else
69    drvInterface = NVPTX::CUDA;
70}
71