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//===- PowerPCSubtarget.cpp - PPC Subtarget Information ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by Nate Begeman and is distributed under the
// University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the PPC specific subclass of TargetSubtarget.
//
//===----------------------------------------------------------------------===//
#include "PPCSubtarget.h"
#include "PPC.h"
#include "llvm/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Target/SubtargetFeature.h"
using namespace llvm;
PPCTargetEnum llvm::PPCTarget = TargetDefault;
namespace llvm {
cl::opt<PPCTargetEnum, true>
PPCTargetArg(cl::desc("Force generation of code for a specific PPC target:"),
cl::values(
clEnumValN(TargetAIX, "aix", " Enable AIX codegen"),
clEnumValN(TargetDarwin,"darwin",
" Enable Darwin codegen"),
clEnumValEnd),
cl::location(PPCTarget), cl::init(TargetDefault));
}
enum PowerPCFeature {
PowerPCFeature64Bit = 1 << 0,
PowerPCFeatureAltivec = 1 << 1,
PowerPCFeatureFSqrt = 1 << 2,
PowerPCFeatureGPUL = 1 << 3,
};
/// Sorted (by key) array of values for CPU subtype.
static const SubtargetFeatureKV PowerPCSubTypeKV[] = {
{ "601" , "Select the PowerPC 601 processor", 0 },
{ "602" , "Select the PowerPC 602 processor", 0 },
{ "603" , "Select the PowerPC 603 processor", 0 },
{ "603e" , "Select the PowerPC 603e processor", 0 },
{ "603ev" , "Select the PowerPC 603ev processor", 0 },
{ "604" , "Select the PowerPC 604 processor", 0 },
{ "604e" , "Select the PowerPC 604e processor", 0 },
{ "620" , "Select the PowerPC 620 processor", 0 },
{ "7400" , "Select the PowerPC 7400 (G4) processor",
PowerPCFeatureAltivec },
{ "7450" , "Select the PowerPC 7450 (G4+) processor",
PowerPCFeatureAltivec },
{ "750" , "Select the PowerPC 750 (G3) processor", 0 },
{ "970" , "Select the PowerPC 970 (G5 - GPUL) processor",
PowerPCFeature64Bit | PowerPCFeatureAltivec |
PowerPCFeatureFSqrt | PowerPCFeatureGPUL },
{ "g3" , "Select the PowerPC G3 (750) processor", 0 },
{ "g4" , "Select the PowerPC G4 (7400) processor",
PowerPCFeatureAltivec },
{ "g4+" , "Select the PowerPC G4+ (7450) processor",
PowerPCFeatureAltivec },
{ "g5" , "Select the PowerPC g5 (970 - GPUL) processor",
PowerPCFeature64Bit | PowerPCFeatureAltivec |
PowerPCFeatureFSqrt | PowerPCFeatureGPUL },
{ "generic", "Select instructions for a generic PowerPC processor", 0 }
};
/// Length of PowerPCSubTypeKV.
static const unsigned PowerPCSubTypeKVSize = sizeof(PowerPCSubTypeKV)
/ sizeof(SubtargetFeatureKV);
/// Sorted (by key) array of values for CPU features.
static SubtargetFeatureKV PowerPCFeatureKV[] = {
{ "64bit" , "Should 64 bit instructions be used" , PowerPCFeature64Bit },
{ "altivec", "Should Altivec instructions be used" , PowerPCFeatureAltivec },
{ "fsqrt" , "Should the fsqrt instruction be used", PowerPCFeatureFSqrt },
{ "gpul" , "Should GPUL instructions be used" , PowerPCFeatureGPUL }
};
/// Length of PowerPCFeatureKV.
static const unsigned PowerPCFeatureKVSize = sizeof(PowerPCFeatureKV)
/ sizeof(SubtargetFeatureKV);
#if defined(__APPLE__)
#include <mach/mach.h>
#include <mach/mach_host.h>
#include <mach/host_info.h>
#include <mach/machine.h>
/// GetCurrentPowerPCFeatures - Returns the current CPUs features.
static const char *GetCurrentPowerPCCPU() {
host_basic_info_data_t hostInfo;
mach_msg_type_number_t infoCount;
infoCount = HOST_BASIC_INFO_COUNT;
host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo,
&infoCount);
if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
switch(hostInfo.cpu_subtype) {
case CPU_SUBTYPE_POWERPC_601: return "601";
case CPU_SUBTYPE_POWERPC_602: return "602";
case CPU_SUBTYPE_POWERPC_603: return "603";
case CPU_SUBTYPE_POWERPC_603e: return "603e";
case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
case CPU_SUBTYPE_POWERPC_604: return "604";
case CPU_SUBTYPE_POWERPC_604e: return "604e";
case CPU_SUBTYPE_POWERPC_620: return "620";
case CPU_SUBTYPE_POWERPC_750: return "750";
case CPU_SUBTYPE_POWERPC_7400: return "7400";
case CPU_SUBTYPE_POWERPC_7450: return "7450";
case CPU_SUBTYPE_POWERPC_970: return "970";
default: ;
}
return "generic";
}
#endif
PPCSubtarget::PPCSubtarget(const Module &M, const std::string &FS)
: StackAlignment(16), IsGigaProcessor(false), IsAIX(false), IsDarwin(false) {
// Determine default and user specified characteristics
std::string CPU = "generic";
#if defined(__APPLE__)
CPU = GetCurrentPowerPCCPU();
#endif
uint32_t Bits =
SubtargetFeatures::Parse(FS, CPU,
PowerPCSubTypeKV, PowerPCSubTypeKVSize,
PowerPCFeatureKV, PowerPCFeatureKVSize);
IsGigaProcessor = (Bits & PowerPCFeatureGPUL ) != 0;
Is64Bit = (Bits & PowerPCFeature64Bit) != 0;
HasFSQRT = (Bits & PowerPCFeatureFSqrt) != 0;
// Set the boolean corresponding to the current target triple, or the default
// if one cannot be determined, to true.
const std::string& TT = M.getTargetTriple();
if (TT.length() > 5) {
IsDarwin = TT.find("darwin") != std::string::npos;
} else if (TT.empty()) {
#if defined(_POWER)
IsAIX = true;
#elif defined(__APPLE__)
IsDarwin = true;
#endif
}
}
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