625 lines
21 KiB
C++
625 lines
21 KiB
C++
//===-- Host.cpp - Implement OS Host Concept --------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file implements the operating system Host concept.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Support/Host.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/Config/config.h"
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#include "llvm/Support/DataStream.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include <string.h>
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// Include the platform-specific parts of this class.
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#ifdef LLVM_ON_UNIX
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#include "Unix/Host.inc"
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#endif
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#ifdef LLVM_ON_WIN32
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#include "Windows/Host.inc"
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#endif
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#ifdef _MSC_VER
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#include <intrin.h>
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#endif
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#if defined(__APPLE__) && (defined(__ppc__) || defined(__powerpc__))
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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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#endif
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//===----------------------------------------------------------------------===//
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//
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// Implementations of the CPU detection routines
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//
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//===----------------------------------------------------------------------===//
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using namespace llvm;
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#if defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)\
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|| defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
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/// GetX86CpuIDAndInfo - Execute the specified cpuid and return the 4 values in the
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/// specified arguments. If we can't run cpuid on the host, return true.
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static bool GetX86CpuIDAndInfo(unsigned value, unsigned *rEAX,
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unsigned *rEBX, unsigned *rECX, unsigned *rEDX) {
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#if defined(__x86_64__) || defined(_M_AMD64) || defined (_M_X64)
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#if defined(__GNUC__)
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// gcc doesn't know cpuid would clobber ebx/rbx. Preseve it manually.
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asm ("movq\t%%rbx, %%rsi\n\t"
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"cpuid\n\t"
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"xchgq\t%%rbx, %%rsi\n\t"
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: "=a" (*rEAX),
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"=S" (*rEBX),
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"=c" (*rECX),
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"=d" (*rEDX)
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: "a" (value));
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return false;
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#elif defined(_MSC_VER)
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int registers[4];
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__cpuid(registers, value);
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*rEAX = registers[0];
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*rEBX = registers[1];
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*rECX = registers[2];
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*rEDX = registers[3];
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return false;
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#else
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return true;
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#endif
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#elif defined(i386) || defined(__i386__) || defined(__x86__) || defined(_M_IX86)
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#if defined(__GNUC__)
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asm ("movl\t%%ebx, %%esi\n\t"
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"cpuid\n\t"
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"xchgl\t%%ebx, %%esi\n\t"
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: "=a" (*rEAX),
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"=S" (*rEBX),
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"=c" (*rECX),
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"=d" (*rEDX)
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: "a" (value));
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return false;
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#elif defined(_MSC_VER)
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__asm {
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mov eax,value
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cpuid
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mov esi,rEAX
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mov dword ptr [esi],eax
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mov esi,rEBX
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mov dword ptr [esi],ebx
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mov esi,rECX
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mov dword ptr [esi],ecx
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mov esi,rEDX
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mov dword ptr [esi],edx
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}
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return false;
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// pedantic #else returns to appease -Wunreachable-code (so we don't generate
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// postprocessed code that looks like "return true; return false;")
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#else
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return true;
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#endif
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#else
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return true;
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#endif
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}
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static bool OSHasAVXSupport() {
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#if defined(__GNUC__)
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// Check xgetbv; this uses a .byte sequence instead of the instruction
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// directly because older assemblers do not include support for xgetbv and
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// there is no easy way to conditionally compile based on the assembler used.
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int rEAX, rEDX;
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__asm__ (".byte 0x0f, 0x01, 0xd0" : "=a" (rEAX), "=d" (rEDX) : "c" (0));
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#elif defined(_MSC_FULL_VER) && defined(_XCR_XFEATURE_ENABLED_MASK)
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unsigned long long rEAX = _xgetbv(_XCR_XFEATURE_ENABLED_MASK);
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#else
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int rEAX = 0; // Ensures we return false
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#endif
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return (rEAX & 6) == 6;
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}
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static void DetectX86FamilyModel(unsigned EAX, unsigned &Family,
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unsigned &Model) {
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Family = (EAX >> 8) & 0xf; // Bits 8 - 11
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Model = (EAX >> 4) & 0xf; // Bits 4 - 7
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if (Family == 6 || Family == 0xf) {
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if (Family == 0xf)
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// Examine extended family ID if family ID is F.
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Family += (EAX >> 20) & 0xff; // Bits 20 - 27
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// Examine extended model ID if family ID is 6 or F.
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Model += ((EAX >> 16) & 0xf) << 4; // Bits 16 - 19
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}
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}
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std::string sys::getHostCPUName() {
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unsigned EAX = 0, EBX = 0, ECX = 0, EDX = 0;
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if (GetX86CpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX))
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return "generic";
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unsigned Family = 0;
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unsigned Model = 0;
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DetectX86FamilyModel(EAX, Family, Model);
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bool HasSSE3 = (ECX & 0x1);
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// If CPUID indicates support for XSAVE, XRESTORE and AVX, and XGETBV
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// indicates that the AVX registers will be saved and restored on context
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// switch, then we have full AVX support.
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const unsigned AVXBits = (1 << 27) | (1 << 28);
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bool HasAVX = ((ECX & AVXBits) == AVXBits) && OSHasAVXSupport();
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GetX86CpuIDAndInfo(0x80000001, &EAX, &EBX, &ECX, &EDX);
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bool Em64T = (EDX >> 29) & 0x1;
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union {
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unsigned u[3];
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char c[12];
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} text;
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GetX86CpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1);
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if (memcmp(text.c, "GenuineIntel", 12) == 0) {
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switch (Family) {
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case 3:
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return "i386";
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case 4:
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switch (Model) {
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case 0: // Intel486 DX processors
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case 1: // Intel486 DX processors
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case 2: // Intel486 SX processors
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case 3: // Intel487 processors, IntelDX2 OverDrive processors,
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// IntelDX2 processors
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case 4: // Intel486 SL processor
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case 5: // IntelSX2 processors
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case 7: // Write-Back Enhanced IntelDX2 processors
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case 8: // IntelDX4 OverDrive processors, IntelDX4 processors
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default: return "i486";
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}
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case 5:
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switch (Model) {
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case 1: // Pentium OverDrive processor for Pentium processor (60, 66),
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// Pentium processors (60, 66)
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case 2: // Pentium OverDrive processor for Pentium processor (75, 90,
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// 100, 120, 133), Pentium processors (75, 90, 100, 120, 133,
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// 150, 166, 200)
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case 3: // Pentium OverDrive processors for Intel486 processor-based
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// systems
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return "pentium";
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case 4: // Pentium OverDrive processor with MMX technology for Pentium
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// processor (75, 90, 100, 120, 133), Pentium processor with
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// MMX technology (166, 200)
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return "pentium-mmx";
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default: return "pentium";
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}
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case 6:
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switch (Model) {
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case 1: // Pentium Pro processor
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return "pentiumpro";
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case 3: // Intel Pentium II OverDrive processor, Pentium II processor,
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// model 03
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case 5: // Pentium II processor, model 05, Pentium II Xeon processor,
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// model 05, and Intel Celeron processor, model 05
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case 6: // Celeron processor, model 06
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return "pentium2";
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case 7: // Pentium III processor, model 07, and Pentium III Xeon
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// processor, model 07
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case 8: // Pentium III processor, model 08, Pentium III Xeon processor,
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// model 08, and Celeron processor, model 08
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case 10: // Pentium III Xeon processor, model 0Ah
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case 11: // Pentium III processor, model 0Bh
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return "pentium3";
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case 9: // Intel Pentium M processor, Intel Celeron M processor model 09.
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case 13: // Intel Pentium M processor, Intel Celeron M processor, model
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// 0Dh. All processors are manufactured using the 90 nm process.
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return "pentium-m";
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case 14: // Intel Core Duo processor, Intel Core Solo processor, model
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// 0Eh. All processors are manufactured using the 65 nm process.
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return "yonah";
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case 15: // Intel Core 2 Duo processor, Intel Core 2 Duo mobile
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// processor, Intel Core 2 Quad processor, Intel Core 2 Quad
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// mobile processor, Intel Core 2 Extreme processor, Intel
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// Pentium Dual-Core processor, Intel Xeon processor, model
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// 0Fh. All processors are manufactured using the 65 nm process.
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case 22: // Intel Celeron processor model 16h. All processors are
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// manufactured using the 65 nm process
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return "core2";
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case 21: // Intel EP80579 Integrated Processor and Intel EP80579
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// Integrated Processor with Intel QuickAssist Technology
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return "i686"; // FIXME: ???
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case 23: // Intel Core 2 Extreme processor, Intel Xeon processor, model
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// 17h. All processors are manufactured using the 45 nm process.
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//
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// 45nm: Penryn , Wolfdale, Yorkfield (XE)
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return "penryn";
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case 26: // Intel Core i7 processor and Intel Xeon processor. All
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// processors are manufactured using the 45 nm process.
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case 29: // Intel Xeon processor MP. All processors are manufactured using
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// the 45 nm process.
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case 30: // Intel(R) Core(TM) i7 CPU 870 @ 2.93GHz.
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// As found in a Summer 2010 model iMac.
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case 37: // Intel Core i7, laptop version.
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case 44: // Intel Core i7 processor and Intel Xeon processor. All
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// processors are manufactured using the 32 nm process.
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case 46: // Nehalem EX
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case 47: // Westmere EX
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return "corei7";
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// SandyBridge:
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case 42: // Intel Core i7 processor. All processors are manufactured
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// using the 32 nm process.
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case 45:
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// Not all Sandy Bridge processors support AVX (such as the Pentium
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// versions instead of the i7 versions).
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return HasAVX ? "corei7-avx" : "corei7";
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// Ivy Bridge:
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case 58:
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// Not all Ivy Bridge processors support AVX (such as the Pentium
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// versions instead of the i7 versions).
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return HasAVX ? "core-avx-i" : "corei7";
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case 28: // Most 45 nm Intel Atom processors
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case 38: // 45 nm Atom Lincroft
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case 39: // 32 nm Atom Medfield
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case 53: // 32 nm Atom Midview
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case 54: // 32 nm Atom Midview
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return "atom";
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default: return (Em64T) ? "x86-64" : "i686";
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}
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case 15: {
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switch (Model) {
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case 0: // Pentium 4 processor, Intel Xeon processor. All processors are
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// model 00h and manufactured using the 0.18 micron process.
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case 1: // Pentium 4 processor, Intel Xeon processor, Intel Xeon
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// processor MP, and Intel Celeron processor. All processors are
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// model 01h and manufactured using the 0.18 micron process.
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case 2: // Pentium 4 processor, Mobile Intel Pentium 4 processor - M,
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// Intel Xeon processor, Intel Xeon processor MP, Intel Celeron
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// processor, and Mobile Intel Celeron processor. All processors
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// are model 02h and manufactured using the 0.13 micron process.
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return (Em64T) ? "x86-64" : "pentium4";
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case 3: // Pentium 4 processor, Intel Xeon processor, Intel Celeron D
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// processor. All processors are model 03h and manufactured using
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// the 90 nm process.
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case 4: // Pentium 4 processor, Pentium 4 processor Extreme Edition,
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// Pentium D processor, Intel Xeon processor, Intel Xeon
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// processor MP, Intel Celeron D processor. All processors are
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// model 04h and manufactured using the 90 nm process.
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case 6: // Pentium 4 processor, Pentium D processor, Pentium processor
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// Extreme Edition, Intel Xeon processor, Intel Xeon processor
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// MP, Intel Celeron D processor. All processors are model 06h
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// and manufactured using the 65 nm process.
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return (Em64T) ? "nocona" : "prescott";
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default:
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return (Em64T) ? "x86-64" : "pentium4";
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}
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}
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default:
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return "generic";
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}
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} else if (memcmp(text.c, "AuthenticAMD", 12) == 0) {
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// FIXME: this poorly matches the generated SubtargetFeatureKV table. There
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// appears to be no way to generate the wide variety of AMD-specific targets
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// from the information returned from CPUID.
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switch (Family) {
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case 4:
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return "i486";
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case 5:
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switch (Model) {
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case 6:
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case 7: return "k6";
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case 8: return "k6-2";
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case 9:
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case 13: return "k6-3";
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case 10: return "geode";
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default: return "pentium";
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}
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case 6:
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switch (Model) {
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case 4: return "athlon-tbird";
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case 6:
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case 7:
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case 8: return "athlon-mp";
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case 10: return "athlon-xp";
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default: return "athlon";
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}
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case 15:
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if (HasSSE3)
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return "k8-sse3";
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switch (Model) {
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case 1: return "opteron";
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case 5: return "athlon-fx"; // also opteron
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default: return "athlon64";
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}
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case 16:
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return "amdfam10";
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case 20:
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return "btver1";
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case 21:
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if (!HasAVX) // If the OS doesn't support AVX provide a sane fallback.
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return "btver1";
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if (Model > 15 && Model <= 31)
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return "bdver2";
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return "bdver1";
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case 22:
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if (!HasAVX) // If the OS doesn't support AVX provide a sane fallback.
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return "btver1";
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return "btver2";
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default:
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return "generic";
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}
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}
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return "generic";
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}
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#elif defined(__APPLE__) && (defined(__ppc__) || defined(__powerpc__))
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std::string sys::getHostCPUName() {
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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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#elif defined(__linux__) && (defined(__ppc__) || defined(__powerpc__))
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std::string sys::getHostCPUName() {
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// Access to the Processor Version Register (PVR) on PowerPC is privileged,
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// and so we must use an operating-system interface to determine the current
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// processor type. On Linux, this is exposed through the /proc/cpuinfo file.
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const char *generic = "generic";
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// Note: We cannot mmap /proc/cpuinfo here and then process the resulting
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// memory buffer because the 'file' has 0 size (it can be read from only
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// as a stream).
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std::string Err;
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DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
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if (!DS) {
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DEBUG(dbgs() << "Unable to open /proc/cpuinfo: " << Err << "\n");
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return generic;
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}
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// The cpu line is second (after the 'processor: 0' line), so if this
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// buffer is too small then something has changed (or is wrong).
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char buffer[1024];
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size_t CPUInfoSize = DS->GetBytes((unsigned char*) buffer, sizeof(buffer));
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delete DS;
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const char *CPUInfoStart = buffer;
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const char *CPUInfoEnd = buffer + CPUInfoSize;
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const char *CIP = CPUInfoStart;
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const char *CPUStart = 0;
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size_t CPULen = 0;
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// We need to find the first line which starts with cpu, spaces, and a colon.
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// After the colon, there may be some additional spaces and then the cpu type.
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while (CIP < CPUInfoEnd && CPUStart == 0) {
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if (CIP < CPUInfoEnd && *CIP == '\n')
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++CIP;
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if (CIP < CPUInfoEnd && *CIP == 'c') {
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++CIP;
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if (CIP < CPUInfoEnd && *CIP == 'p') {
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++CIP;
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if (CIP < CPUInfoEnd && *CIP == 'u') {
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++CIP;
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while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
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++CIP;
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if (CIP < CPUInfoEnd && *CIP == ':') {
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++CIP;
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while (CIP < CPUInfoEnd && (*CIP == ' ' || *CIP == '\t'))
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++CIP;
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if (CIP < CPUInfoEnd) {
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CPUStart = CIP;
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while (CIP < CPUInfoEnd && (*CIP != ' ' && *CIP != '\t' &&
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*CIP != ',' && *CIP != '\n'))
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++CIP;
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CPULen = CIP - CPUStart;
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}
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}
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}
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}
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}
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if (CPUStart == 0)
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while (CIP < CPUInfoEnd && *CIP != '\n')
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++CIP;
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}
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if (CPUStart == 0)
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return generic;
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return StringSwitch<const char *>(StringRef(CPUStart, CPULen))
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.Case("604e", "604e")
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.Case("604", "604")
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.Case("7400", "7400")
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.Case("7410", "7400")
|
|
.Case("7447", "7400")
|
|
.Case("7455", "7450")
|
|
.Case("G4", "g4")
|
|
.Case("POWER4", "970")
|
|
.Case("PPC970FX", "970")
|
|
.Case("PPC970MP", "970")
|
|
.Case("G5", "g5")
|
|
.Case("POWER5", "g5")
|
|
.Case("A2", "a2")
|
|
.Case("POWER6", "pwr6")
|
|
.Case("POWER7", "pwr7")
|
|
.Default(generic);
|
|
}
|
|
#elif defined(__linux__) && defined(__arm__)
|
|
std::string sys::getHostCPUName() {
|
|
// The cpuid register on arm is not accessible from user space. On Linux,
|
|
// it is exposed through the /proc/cpuinfo file.
|
|
// Note: We cannot mmap /proc/cpuinfo here and then process the resulting
|
|
// memory buffer because the 'file' has 0 size (it can be read from only
|
|
// as a stream).
|
|
|
|
std::string Err;
|
|
DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
|
|
if (!DS) {
|
|
DEBUG(dbgs() << "Unable to open /proc/cpuinfo: " << Err << "\n");
|
|
return "generic";
|
|
}
|
|
|
|
// Read 1024 bytes from /proc/cpuinfo, which should contain the CPU part line
|
|
// in all cases.
|
|
char buffer[1024];
|
|
size_t CPUInfoSize = DS->GetBytes((unsigned char*) buffer, sizeof(buffer));
|
|
delete DS;
|
|
|
|
StringRef Str(buffer, CPUInfoSize);
|
|
|
|
SmallVector<StringRef, 32> Lines;
|
|
Str.split(Lines, "\n");
|
|
|
|
// Look for the CPU implementer line.
|
|
StringRef Implementer;
|
|
for (unsigned I = 0, E = Lines.size(); I != E; ++I)
|
|
if (Lines[I].startswith("CPU implementer"))
|
|
Implementer = Lines[I].substr(15).ltrim("\t :");
|
|
|
|
if (Implementer == "0x41") // ARM Ltd.
|
|
// Look for the CPU part line.
|
|
for (unsigned I = 0, E = Lines.size(); I != E; ++I)
|
|
if (Lines[I].startswith("CPU part"))
|
|
// The CPU part is a 3 digit hexadecimal number with a 0x prefix. The
|
|
// values correspond to the "Part number" in the CP15/c0 register. The
|
|
// contents are specified in the various processor manuals.
|
|
return StringSwitch<const char *>(Lines[I].substr(8).ltrim("\t :"))
|
|
.Case("0x926", "arm926ej-s")
|
|
.Case("0xb02", "mpcore")
|
|
.Case("0xb36", "arm1136j-s")
|
|
.Case("0xb56", "arm1156t2-s")
|
|
.Case("0xb76", "arm1176jz-s")
|
|
.Case("0xc08", "cortex-a8")
|
|
.Case("0xc09", "cortex-a9")
|
|
.Case("0xc0f", "cortex-a15")
|
|
.Case("0xc20", "cortex-m0")
|
|
.Case("0xc23", "cortex-m3")
|
|
.Case("0xc24", "cortex-m4")
|
|
.Default("generic");
|
|
|
|
return "generic";
|
|
}
|
|
#else
|
|
std::string sys::getHostCPUName() {
|
|
return "generic";
|
|
}
|
|
#endif
|
|
|
|
#if defined(__linux__) && defined(__arm__)
|
|
bool sys::getHostCPUFeatures(StringMap<bool> &Features) {
|
|
std::string Err;
|
|
DataStreamer *DS = getDataFileStreamer("/proc/cpuinfo", &Err);
|
|
if (!DS) {
|
|
DEBUG(dbgs() << "Unable to open /proc/cpuinfo: " << Err << "\n");
|
|
return false;
|
|
}
|
|
|
|
// Read 1024 bytes from /proc/cpuinfo, which should contain the Features line
|
|
// in all cases.
|
|
char buffer[1024];
|
|
size_t CPUInfoSize = DS->GetBytes((unsigned char*) buffer, sizeof(buffer));
|
|
delete DS;
|
|
|
|
StringRef Str(buffer, CPUInfoSize);
|
|
|
|
SmallVector<StringRef, 32> Lines;
|
|
Str.split(Lines, "\n");
|
|
|
|
// Look for the CPU implementer line.
|
|
StringRef Implementer;
|
|
for (unsigned I = 0, E = Lines.size(); I != E; ++I)
|
|
if (Lines[I].startswith("CPU implementer"))
|
|
Implementer = Lines[I].substr(15).ltrim("\t :");
|
|
|
|
if (Implementer == "0x41") { // ARM Ltd.
|
|
SmallVector<StringRef, 32> CPUFeatures;
|
|
|
|
// Look for the CPU features.
|
|
for (unsigned I = 0, E = Lines.size(); I != E; ++I)
|
|
if (Lines[I].startswith("Features")) {
|
|
Lines[I].split(CPUFeatures, " ");
|
|
break;
|
|
}
|
|
|
|
for (unsigned I = 0, E = CPUFeatures.size(); I != E; ++I) {
|
|
StringRef LLVMFeatureStr = StringSwitch<StringRef>(CPUFeatures[I])
|
|
.Case("half", "fp16")
|
|
.Case("neon", "neon")
|
|
.Case("vfpv3", "vfp3")
|
|
.Case("vfpv3d16", "d16")
|
|
.Case("vfpv4", "vfp4")
|
|
.Case("idiva", "hwdiv-arm")
|
|
.Case("idivt", "hwdiv")
|
|
.Default("");
|
|
|
|
if (LLVMFeatureStr != "")
|
|
Features.GetOrCreateValue(LLVMFeatureStr).setValue(true);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
#else
|
|
bool sys::getHostCPUFeatures(StringMap<bool> &Features){
|
|
return false;
|
|
}
|
|
#endif
|
|
|
|
std::string sys::getProcessTriple() {
|
|
Triple PT(LLVM_HOST_TRIPLE);
|
|
|
|
if (sizeof(void *) == 8 && PT.isArch32Bit())
|
|
PT = PT.get64BitArchVariant();
|
|
if (sizeof(void *) == 4 && PT.isArch64Bit())
|
|
PT = PT.get32BitArchVariant();
|
|
|
|
return PT.str();
|
|
}
|