mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-30 05:29:47 +00:00
These are strictly utilities for registering targets and components. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138450 91177308-0d34-0410-b5e6-96231b3b80d8
142 lines
4.6 KiB
C++
142 lines
4.6 KiB
C++
//===- PowerPCSubtarget.cpp - PPC Subtarget Information -------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the PPC specific subclass of TargetSubtargetInfo.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PPCSubtarget.h"
|
|
#include "PPC.h"
|
|
#include "llvm/GlobalValue.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Support/TargetRegistry.h"
|
|
#include <cstdlib>
|
|
|
|
#define GET_SUBTARGETINFO_TARGET_DESC
|
|
#define GET_SUBTARGETINFO_CTOR
|
|
#include "PPCGenSubtargetInfo.inc"
|
|
|
|
using namespace llvm;
|
|
|
|
#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 std::string &TT, const std::string &CPU,
|
|
const std::string &FS, bool is64Bit)
|
|
: PPCGenSubtargetInfo(TT, CPU, FS)
|
|
, StackAlignment(16)
|
|
, DarwinDirective(PPC::DIR_NONE)
|
|
, IsGigaProcessor(false)
|
|
, Has64BitSupport(false)
|
|
, Use64BitRegs(false)
|
|
, IsPPC64(is64Bit)
|
|
, HasAltivec(false)
|
|
, HasFSQRT(false)
|
|
, HasSTFIWX(false)
|
|
, HasLazyResolverStubs(false)
|
|
, IsJITCodeModel(false)
|
|
, TargetTriple(TT) {
|
|
|
|
// Determine default and user specified characteristics
|
|
std::string CPUName = CPU;
|
|
if (CPUName.empty())
|
|
CPUName = "generic";
|
|
#if defined(__APPLE__)
|
|
if (CPUName == "generic")
|
|
CPUName = GetCurrentPowerPCCPU();
|
|
#endif
|
|
|
|
// Parse features string.
|
|
ParseSubtargetFeatures(CPUName, FS);
|
|
|
|
// Initialize scheduling itinerary for the specified CPU.
|
|
InstrItins = getInstrItineraryForCPU(CPUName);
|
|
|
|
// If we are generating code for ppc64, verify that options make sense.
|
|
if (is64Bit) {
|
|
Has64BitSupport = true;
|
|
// Silently force 64-bit register use on ppc64.
|
|
Use64BitRegs = true;
|
|
}
|
|
|
|
// If the user requested use of 64-bit regs, but the cpu selected doesn't
|
|
// support it, ignore.
|
|
if (use64BitRegs() && !has64BitSupport())
|
|
Use64BitRegs = false;
|
|
|
|
// Set up darwin-specific properties.
|
|
if (isDarwin())
|
|
HasLazyResolverStubs = true;
|
|
}
|
|
|
|
/// SetJITMode - This is called to inform the subtarget info that we are
|
|
/// producing code for the JIT.
|
|
void PPCSubtarget::SetJITMode() {
|
|
// JIT mode doesn't want lazy resolver stubs, it knows exactly where
|
|
// everything is. This matters for PPC64, which codegens in PIC mode without
|
|
// stubs.
|
|
HasLazyResolverStubs = false;
|
|
|
|
// Calls to external functions need to use indirect calls
|
|
IsJITCodeModel = true;
|
|
}
|
|
|
|
|
|
/// hasLazyResolverStub - Return true if accesses to the specified global have
|
|
/// to go through a dyld lazy resolution stub. This means that an extra load
|
|
/// is required to get the address of the global.
|
|
bool PPCSubtarget::hasLazyResolverStub(const GlobalValue *GV,
|
|
const TargetMachine &TM) const {
|
|
// We never have stubs if HasLazyResolverStubs=false or if in static mode.
|
|
if (!HasLazyResolverStubs || TM.getRelocationModel() == Reloc::Static)
|
|
return false;
|
|
// If symbol visibility is hidden, the extra load is not needed if
|
|
// the symbol is definitely defined in the current translation unit.
|
|
bool isDecl = GV->isDeclaration() && !GV->isMaterializable();
|
|
if (GV->hasHiddenVisibility() && !isDecl && !GV->hasCommonLinkage())
|
|
return false;
|
|
return GV->hasWeakLinkage() || GV->hasLinkOnceLinkage() ||
|
|
GV->hasCommonLinkage() || isDecl;
|
|
}
|