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9d2b817fcb
option. Currently the only way to enable this is to specify the 64bitregs mattr flag. It is never enabled by default on any config yet. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23779 91177308-0d34-0410-b5e6-96231b3b80d8
154 lines
5.9 KiB
C++
154 lines
5.9 KiB
C++
//===- PowerPCSubtarget.cpp - PPC Subtarget Information ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by Nate Begeman and is distributed under the
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// University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the PPC specific subclass of TargetSubtarget.
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//
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//===----------------------------------------------------------------------===//
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#include "PPCSubtarget.h"
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#include "PPC.h"
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#include "llvm/Module.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Target/SubtargetFeature.h"
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using namespace llvm;
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PPCTargetEnum llvm::PPCTarget = TargetDefault;
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namespace llvm {
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cl::opt<PPCTargetEnum, true>
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PPCTargetArg(cl::desc("Force generation of code for a specific PPC target:"),
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cl::values(
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clEnumValN(TargetAIX, "aix", " Enable AIX codegen"),
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clEnumValN(TargetDarwin,"darwin",
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" Enable Darwin codegen"),
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clEnumValEnd),
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cl::location(PPCTarget), cl::init(TargetDefault));
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}
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enum PowerPCFeature {
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PowerPCFeature64Bit = 1 << 0,
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PowerPCFeatureAltivec = 1 << 1,
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PowerPCFeatureFSqrt = 1 << 2,
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PowerPCFeatureGPUL = 1 << 3,
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PowerPCFeature64BRegs = 1 << 4
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};
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/// Sorted (by key) array of values for CPU subtype.
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static const SubtargetFeatureKV PowerPCSubTypeKV[] = {
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{ "601" , "Select the PowerPC 601 processor", 0 },
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{ "602" , "Select the PowerPC 602 processor", 0 },
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{ "603" , "Select the PowerPC 603 processor", 0 },
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{ "603e" , "Select the PowerPC 603e processor", 0 },
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{ "603ev" , "Select the PowerPC 603ev processor", 0 },
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{ "604" , "Select the PowerPC 604 processor", 0 },
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{ "604e" , "Select the PowerPC 604e processor", 0 },
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{ "620" , "Select the PowerPC 620 processor", 0 },
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{ "7400" , "Select the PowerPC 7400 (G4) processor",
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PowerPCFeatureAltivec },
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{ "7450" , "Select the PowerPC 7450 (G4+) processor",
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PowerPCFeatureAltivec },
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{ "750" , "Select the PowerPC 750 (G3) processor", 0 },
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{ "970" , "Select the PowerPC 970 (G5 - GPUL) processor",
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PowerPCFeature64Bit | PowerPCFeatureAltivec |
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PowerPCFeatureFSqrt | PowerPCFeatureGPUL },
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{ "g3" , "Select the PowerPC G3 (750) processor", 0 },
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{ "g4" , "Select the PowerPC G4 (7400) processor",
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PowerPCFeatureAltivec },
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{ "g4+" , "Select the PowerPC G4+ (7450) processor",
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PowerPCFeatureAltivec },
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{ "g5" , "Select the PowerPC g5 (970 - GPUL) processor",
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PowerPCFeature64Bit | PowerPCFeatureAltivec |
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PowerPCFeatureFSqrt | PowerPCFeatureGPUL },
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{ "generic", "Select instructions for a generic PowerPC processor", 0 }
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};
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/// Length of PowerPCSubTypeKV.
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static const unsigned PowerPCSubTypeKVSize = sizeof(PowerPCSubTypeKV)
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/ sizeof(SubtargetFeatureKV);
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/// Sorted (by key) array of values for CPU features.
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static SubtargetFeatureKV PowerPCFeatureKV[] = {
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{ "64bit" , "Should 64 bit instructions be used" , PowerPCFeature64Bit },
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{ "64bitregs", "Should 64 bit registers be used" , PowerPCFeature64BRegs },
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{ "altivec", "Should Altivec instructions be used" , PowerPCFeatureAltivec },
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{ "fsqrt" , "Should the fsqrt instruction be used", PowerPCFeatureFSqrt },
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{ "gpul" , "Should GPUL instructions be used" , PowerPCFeatureGPUL }
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};
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/// Length of PowerPCFeatureKV.
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static const unsigned PowerPCFeatureKVSize = sizeof(PowerPCFeatureKV)
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/ sizeof(SubtargetFeatureKV);
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#if defined(__APPLE__)
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#include <mach/mach.h>
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#include <mach/mach_host.h>
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#include <mach/host_info.h>
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#include <mach/machine.h>
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/// GetCurrentPowerPCFeatures - Returns the current CPUs features.
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static const char *GetCurrentPowerPCCPU() {
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host_basic_info_data_t hostInfo;
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mach_msg_type_number_t infoCount;
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infoCount = HOST_BASIC_INFO_COUNT;
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host_info(mach_host_self(), HOST_BASIC_INFO, (host_info_t)&hostInfo,
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&infoCount);
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if (hostInfo.cpu_type != CPU_TYPE_POWERPC) return "generic";
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switch(hostInfo.cpu_subtype) {
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case CPU_SUBTYPE_POWERPC_601: return "601";
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case CPU_SUBTYPE_POWERPC_602: return "602";
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case CPU_SUBTYPE_POWERPC_603: return "603";
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case CPU_SUBTYPE_POWERPC_603e: return "603e";
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case CPU_SUBTYPE_POWERPC_603ev: return "603ev";
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case CPU_SUBTYPE_POWERPC_604: return "604";
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case CPU_SUBTYPE_POWERPC_604e: return "604e";
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case CPU_SUBTYPE_POWERPC_620: return "620";
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case CPU_SUBTYPE_POWERPC_750: return "750";
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case CPU_SUBTYPE_POWERPC_7400: return "7400";
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case CPU_SUBTYPE_POWERPC_7450: return "7450";
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case CPU_SUBTYPE_POWERPC_970: return "970";
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default: ;
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}
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return "generic";
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}
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#endif
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PPCSubtarget::PPCSubtarget(const Module &M, const std::string &FS)
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: StackAlignment(16), IsGigaProcessor(false), IsAIX(false), IsDarwin(false) {
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// Determine default and user specified characteristics
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std::string CPU = "generic";
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#if defined(__APPLE__)
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CPU = GetCurrentPowerPCCPU();
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#endif
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uint32_t Bits =
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SubtargetFeatures::Parse(FS, CPU,
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PowerPCSubTypeKV, PowerPCSubTypeKVSize,
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PowerPCFeatureKV, PowerPCFeatureKVSize);
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IsGigaProcessor = (Bits & PowerPCFeatureGPUL ) != 0;
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Is64Bit = (Bits & PowerPCFeature64Bit) != 0;
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HasFSQRT = (Bits & PowerPCFeatureFSqrt) != 0;
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Has64BitRegs = (Bits & PowerPCFeature64BRegs) != 0;
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// Set the boolean corresponding to the current target triple, or the default
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// if one cannot be determined, to true.
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const std::string& TT = M.getTargetTriple();
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if (TT.length() > 5) {
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IsDarwin = TT.find("darwin") != std::string::npos;
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} else if (TT.empty()) {
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#if defined(_POWER)
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IsAIX = true;
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#elif defined(__APPLE__)
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IsDarwin = true;
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#endif
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}
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}
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