1 //===- PowerPCSubtarget.cpp - PPC Subtarget Information -------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by Nate Begeman and is distributed under the
6 // University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the PPC specific subclass of TargetSubtarget.
12 //===----------------------------------------------------------------------===//
14 #include "PPCSubtarget.h"
16 #include "llvm/Module.h"
17 #include "llvm/Support/CommandLine.h"
18 #include "PPCGenSubtarget.inc"
22 PPCTargetEnum llvm::PPCTarget = TargetDefault;
25 cl::opt<PPCTargetEnum, true>
26 PPCTargetArg(cl::desc("Force generation of code for a specific PPC target:"),
28 clEnumValN(TargetAIX, "aix", " Enable AIX codegen"),
29 clEnumValN(TargetDarwin,"darwin",
30 " Enable Darwin codegen"),
32 cl::location(PPCTarget), cl::init(TargetDefault));
35 #if defined(__APPLE__)
36 #include <mach/mach.h>
37 #include <mach/mach_host.h>
38 #include <mach/host_info.h>
39 #include <mach/machine.h>
41 /// GetCurrentPowerPCFeatures - Returns the current CPUs features.
42 static const char *GetCurrentPowerPCCPU() {
43 host_basic_info_data_t hostInfo;
44 mach_msg_type_number_t infoCount;
46 infoCount = HOST_BASIC_INFO_COUNT;
47 host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo,
50 if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
52 switch(hostInfo.cpu_subtype) {
53 case CPU_SUBTYPE_POWERPC_601: return "601";
54 case CPU_SUBTYPE_POWERPC_602: return "602";
55 case CPU_SUBTYPE_POWERPC_603: return "603";
56 case CPU_SUBTYPE_POWERPC_603e: return "603e";
57 case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
58 case CPU_SUBTYPE_POWERPC_604: return "604";
59 case CPU_SUBTYPE_POWERPC_604e: return "604e";
60 case CPU_SUBTYPE_POWERPC_620: return "620";
61 case CPU_SUBTYPE_POWERPC_750: return "750";
62 case CPU_SUBTYPE_POWERPC_7400: return "7400";
63 case CPU_SUBTYPE_POWERPC_7450: return "7450";
64 case CPU_SUBTYPE_POWERPC_970: return "970";
73 PPCSubtarget::PPCSubtarget(const Module &M, const std::string &FS, bool is64Bit)
76 , IsGigaProcessor(false)
77 , Has64BitSupport(false)
86 // Determine default and user specified characteristics
87 std::string CPU = "generic";
88 #if defined(__APPLE__)
89 CPU = GetCurrentPowerPCCPU();
92 // Parse features string.
93 ParseSubtargetFeatures(FS, CPU);
95 // If we are generating code for ppc64, verify that options make sense.
97 if (!has64BitSupport()) {
98 std::cerr << "PPC: Generation of 64-bit code for a 32-bit processor "
99 "requested. Ignoring 32-bit processor feature.\n";
100 Has64BitSupport = true;
101 // Silently force 64-bit register use on ppc64.
106 // If the user requested use of 64-bit regs, but the cpu selected doesn't
107 // support it, warn and ignore.
108 if (use64BitRegs() && !has64BitSupport()) {
109 std::cerr << "PPC: 64-bit registers requested on CPU without support. "
110 "Disabling 64-bit register use.\n";
111 Use64BitRegs = false;
114 // Set the boolean corresponding to the current target triple, or the default
115 // if one cannot be determined, to true.
116 const std::string& TT = M.getTargetTriple();
117 if (TT.length() > 5) {
118 IsDarwin = TT.find("darwin") != std::string::npos;
119 } else if (TT.empty()) {
122 #elif defined(__APPLE__)