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27474060e1287a67c45cd790d29b9095b35b2bdf
emulator/src/common/src/x86_utils.cpp
ShizZy 27474060e1 adding initial project layout
2013-08-29 23:35:09 -04:00

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/**
* Copyright (C) 2005-2012 Gekko Emulator
*
* @file x86_utils.cpp
* @author ShizZy <shizzy247@gmail.com>
* @date 2012-12-23
* @brief Utilities for the x86 architecture
*
* @section LICENSE
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details at
* http://www.gnu.org/copyleft/gpl.html
*
* Official project repository can be found at:
* http://code.google.com/p/gekko-gc-emu/
*/
#include "common.h"
#include "x86_utils.h"
#ifdef _WIN32
#define _interlockedbittestandset workaround_ms_header_bug_platform_sdk6_set
#define _interlockedbittestandreset workaround_ms_header_bug_platform_sdk6_reset
#define _interlockedbittestandset64 workaround_ms_header_bug_platform_sdk6_set64
#define _interlockedbittestandreset64 workaround_ms_header_bug_platform_sdk6_reset64
#include <intrin.h>
#undef _interlockedbittestandset
#undef _interlockedbittestandreset
#undef _interlockedbittestandset64
#undef _interlockedbittestandreset64
#else
//#include <config/i386/cpuid.h>
#include <xmmintrin.h>
#if defined __FreeBSD__
#include <sys/types.h>
#include <machine/cpufunc.h>
#else
static inline void do_cpuid(unsigned int *eax, unsigned int *ebx,
unsigned int *ecx, unsigned int *edx)
{
#ifdef _LP64
// Note: EBX is reserved on Mac OS X and in PIC on Linux, so it has to
// restored at the end of the asm block.
__asm__ (
"cpuid;"
"movl %%ebx,%1;"
: "=a" (*eax),
"=S" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "a" (*eax)
: "rbx"
);
#else
__asm__ (
"cpuid;"
"movl %%ebx,%1;"
: "=a" (*eax),
"=S" (*ebx),
"=c" (*ecx),
"=d" (*edx)
: "a" (*eax)
: "ebx"
);
#endif
}
#endif
static void __cpuid(int info[4], int x)
{
#if defined __FreeBSD__
do_cpuid((unsigned int)x, (unsigned int*)info);
#else
unsigned int eax = x, ebx = 0, ecx = 0, edx = 0;
do_cpuid(&eax, &ebx, &ecx, &edx);
info[0] = eax;
info[1] = ebx;
info[2] = ecx;
info[3] = edx;
#endif
}
#endif
namespace common {
X86Utils::X86Utils() {
memset(this, 0, sizeof(*this));
#ifdef _M_IX86
#elif defined (_M_X64)
support_x64_os_ = true;
support_sse_ = true;
support_sse2_ = true;
#endif
num_cores_ = 1;
#ifdef _WIN32
#ifdef _M_IX86
int f64 = 0;
IsWow64Process(GetCurrentProcess(), &f64);
support_x64_os_ = (f64 == 1) ? true : false;
#endif
#endif
// Assume CPU supports the CPUID instruction. Those that don't can barely
// boot modern OS:es anyway.
int cpu_id[4];
char cpu_string[32];
memset(cpu_string, 0, sizeof(cpu_string));
// Detect CPU's CPUID capabilities, and grab cpu string
__cpuid(cpu_id, 0x00000000);
u32 max_std_fn = cpu_id[0]; // EAX
*((int *)cpu_string) = cpu_id[1];
*((int *)(cpu_string + 4)) = cpu_id[3];
*((int *)(cpu_string + 8)) = cpu_id[2];
__cpuid(cpu_id, 0x80000000);
u32 max_ex_fn = cpu_id[0];
if (!strcmp(cpu_string, "GenuineIntel")) {
cpu_vendor_ = kVendorX86_Intel;
} else if (!strcmp(cpu_string, "AuthenticAMD")) {
cpu_vendor_ = kVendorX86_AMD;
} else {
cpu_vendor_ = kVendorX86_None;
}
// Detect family and other misc stuff.
bool ht = false;
support_hyper_threading_ = ht;
logical_cpu_count_ = 1;
if (max_std_fn >= 1) {
__cpuid(cpu_id, 0x00000001);
logical_cpu_count_ = (cpu_id[1] >> 16) & 0xFF;
ht = (cpu_id[3] >> 28) & 1;
if ((cpu_id[3] >> 25) & 1) support_sse_ = true;
if ((cpu_id[3] >> 26) & 1) support_sse2_ = true;
if ((cpu_id[2]) & 1) support_sse3_ = true;
if ((cpu_id[2] >> 9) & 1) support_ssse3_ = true;
if ((cpu_id[2] >> 19) & 1) support_sse4_1_ = true;
if ((cpu_id[2] >> 20) & 1) support_sse4_2_ = true;
}
if (max_ex_fn >= 0x80000004) {
// Extract brand string
__cpuid(cpu_id, 0x80000002);
// memcpy(brand_string, cpu_id, sizeof(cpu_id));
__cpuid(cpu_id, 0x80000003);
// memcpy(brand_string + 16, cpu_id, sizeof(cpu_id));
__cpuid(cpu_id, 0x80000004);
// memcpy(brand_string + 32, cpu_id, sizeof(cpu_id));
}
num_cores_ = (logical_cpu_count_ == 0) ? 1 : logical_cpu_count_;
if (max_ex_fn >= 0x80000008) {
// Get number of cores. This is a bit complicated. Following AMD manual here.
__cpuid(cpu_id, 0x80000008);
int apic_id_core_id_size = (cpu_id[2] >> 12) & 0xF;
if (apic_id_core_id_size == 0) {
if (ht) {
// New mechanism for modern Intel CPUs.
if (cpu_vendor_ == kVendorX86_Intel) {
__cpuid(cpu_id, 0x00000004);
int cores_x_package = ((cpu_id[0] >> 26) & 0x3F) + 1;
support_hyper_threading_ = (cores_x_package < logical_cpu_count_);
cores_x_package = ((logical_cpu_count_ % cores_x_package) == 0) ? cores_x_package : 1;
num_cores_ = (cores_x_package > 1) ? cores_x_package : num_cores_;
logical_cpu_count_ /= cores_x_package;
}
}
} else {
// Use AMD's new method.
num_cores_ = (cpu_id[2] & 0xFF) + 1;
}
}
LOG_NOTICE(TCOMMON, "CPU detected (%s)", this->Summary().c_str());
}
X86Utils::~X86Utils() {
}
/**
* Check if an X86 extension is supported by the current architecture
* @param extension ExtensionX86 extension support to check for
* @return True if the extension is supported, otherwise false
*/
bool X86Utils::IsExtensionSupported(X86Utils::ExtensionX86 extension) {
switch (extension) {
case kExtensionX86_SSE:
return support_sse_;
case kExtensionX86_SSE2:
return support_sse2_;
case kExtensionX86_SSE3:
return support_sse3_;
case kExtensionX86_SSSE3:
return support_ssse3_;
case kExtensionX86_SSE4_1:
return support_sse4_1_;
case kExtensionX86_SSE4_2:
return support_sse4_2_;
}
return false;
}
/**
* Gets a string summary of the X86 CPU information, suitable for printing
* @return String summary
*/
std::string X86Utils::Summary() {
const char* cpu_vendors[] = {
"Unknown", "Intel", "AMD"
};
std::string res;
res = FormatStr("%s, %d core%s", cpu_vendors[cpu_vendor_], num_cores_, (num_cores_ > 1) ? "s" : "");
if (support_sse4_2_) {
res += FormatStr(" (%i logical threads per physical core)", logical_cpu_count_);
}
if (support_sse_) res += ", SSE";
if (support_sse2_) res += ", SSE2";
if (support_sse3_) res += ", SSE3";
if (support_ssse3_) res += ", SSSE3";
if (support_sse4_1_) res += ", SSE4.1";
if (support_sse4_2_) res += ", SSE4.2";
if (support_hyper_threading_) res += ", HTT";
//if (bLongMode) res += ", 64-bit support";
return res;
}
} // namespace
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