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 "PPCGenSubtarget.inc"
21 #if defined(__APPLE__)
22 #include <mach/mach.h>
23 #include <mach/mach_host.h>
24 #include <mach/host_info.h>
25 #include <mach/machine.h>
27 /// GetCurrentPowerPCFeatures - Returns the current CPUs features.
28 static const char *GetCurrentPowerPCCPU() {
29 host_basic_info_data_t hostInfo;
30 mach_msg_type_number_t infoCount;
32 infoCount = HOST_BASIC_INFO_COUNT;
33 host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo,
36 if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
38 switch(hostInfo.cpu_subtype) {
39 case CPU_SUBTYPE_POWERPC_601: return "601";
40 case CPU_SUBTYPE_POWERPC_602: return "602";
41 case CPU_SUBTYPE_POWERPC_603: return "603";
42 case CPU_SUBTYPE_POWERPC_603e: return "603e";
43 case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
44 case CPU_SUBTYPE_POWERPC_604: return "604";
45 case CPU_SUBTYPE_POWERPC_604e: return "604e";
46 case CPU_SUBTYPE_POWERPC_620: return "620";
47 case CPU_SUBTYPE_POWERPC_750: return "750";
48 case CPU_SUBTYPE_POWERPC_7400: return "7400";
49 case CPU_SUBTYPE_POWERPC_7450: return "7450";
50 case CPU_SUBTYPE_POWERPC_970: return "970";
59 PPCSubtarget::PPCSubtarget(const Module &M, const std::string &FS, bool is64Bit)
62 , IsGigaProcessor(false)
63 , Has64BitSupport(false)
72 // Determine default and user specified characteristics
73 std::string CPU = "generic";
74 #if defined(__APPLE__)
75 CPU = GetCurrentPowerPCCPU();
78 // Parse features string.
79 ParseSubtargetFeatures(FS, CPU);
81 // If we are generating code for ppc64, verify that options make sense.
83 if (!has64BitSupport()) {
84 std::cerr << "PPC: Generation of 64-bit code for a 32-bit processor "
85 "requested. Ignoring 32-bit processor feature.\n";
86 Has64BitSupport = true;
87 // Silently force 64-bit register use on ppc64.
92 // If the user requested use of 64-bit regs, but the cpu selected doesn't
93 // support it, warn and ignore.
94 if (use64BitRegs() && !has64BitSupport()) {
95 std::cerr << "PPC: 64-bit registers requested on CPU without support. "
96 "Disabling 64-bit register use.\n";
100 // Set the boolean corresponding to the current target triple, or the default
101 // if one cannot be determined, to true.
102 const std::string& TT = M.getTargetTriple();
103 if (TT.length() > 5) {
104 IsDarwin = TT.find("-darwin") != std::string::npos;
106 IsAIX = TT.find("-aix") != std::string::npos;
107 } else if (TT.empty()) {
110 #elif defined(__APPLE__)