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 #define GET_SUBTARGETINFO_ENUM
16 #define GET_SUBTARGETINFO_TARGET_DESC
17 #define GET_SUBTARGETINFO_CTOR
18 #include "NVPTXGenSubtargetInfo.inc"
19
20 using namespace llvm;
21
22
23 // Pin the vtable to this file.
anchor()24 void NVPTXSubtarget::anchor() {}
25
NVPTXSubtarget(const std::string & TT,const std::string & CPU,const std::string & FS,bool is64Bit)26 NVPTXSubtarget::NVPTXSubtarget(const std::string &TT, const std::string &CPU,
27 const std::string &FS, bool is64Bit)
28 : NVPTXGenSubtargetInfo(TT, CPU, FS), Is64Bit(is64Bit), PTXVersion(0),
29 SmVersion(20) {
30
31 Triple T(TT);
32
33 if (T.getOS() == Triple::NVCL)
34 drvInterface = NVPTX::NVCL;
35 else
36 drvInterface = NVPTX::CUDA;
37
38 // Provide the default CPU if none
39 std::string defCPU = "sm_20";
40
41 ParseSubtargetFeatures((CPU.empty() ? defCPU : CPU), FS);
42
43 // Get the TargetName from the FS if available
44 if (FS.empty() && CPU.empty())
45 TargetName = defCPU;
46 else if (!CPU.empty())
47 TargetName = CPU;
48 else
49 llvm_unreachable("we are not using FeatureStr");
50
51 // We default to PTX 3.1, but we cannot just default to it in the initializer
52 // since the attribute parser checks if the given option is >= the default.
53 // So if we set ptx31 as the default, the ptx30 attribute would never match.
54 // Instead, we use 0 as the default and manually set 31 if the default is
55 // used.
56 if (PTXVersion == 0) {
57 PTXVersion = 31;
58 }
59 }
60