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/*
* Copyright 2011-2013 Blender Foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License
*/
#include "util_system.h"
#include "util_types.h"
#ifdef _WIN32
#if(!defined(FREE_WINDOWS))
#include <intrin.h>
#endif
#include <windows.h>
#elif defined(__APPLE__)
#include <sys/sysctl.h>
#include <sys/types.h>
#else
#include <unistd.h>
#endif
CCL_NAMESPACE_BEGIN
int system_cpu_thread_count()
{
static uint count = 0;
if(count > 0)
return count;
#ifdef _WIN32
SYSTEM_INFO info;
GetSystemInfo(&info);
count = (uint)info.dwNumberOfProcessors;
#elif defined(__APPLE__)
size_t len = sizeof(count);
int mib[2] = { CTL_HW, HW_NCPU };
sysctl(mib, 2, &count, &len, NULL, 0);
#else
count = (uint)sysconf(_SC_NPROCESSORS_ONLN);
#endif
if(count < 1)
count = 1;
return count;
}
#if !defined(_WIN32) || defined(FREE_WINDOWS)
static void __cpuid(int data[4], int selector)
{
#ifdef __x86_64__
asm("cpuid" : "=a" (data[0]), "=b" (data[1]), "=c" (data[2]), "=d" (data[3]) : "a"(selector));
#else
#ifdef __i386__
asm("pushl %%ebx \n\t"
"cpuid \n\t"
"movl %%ebx, %1 \n\t"
"popl %%ebx \n\t" : "=a" (data[0]), "=r" (data[1]), "=c" (data[2]), "=d" (data[3]) : "a"(selector));
#else
data[0] = data[1] = data[2] = data[3] = 0;
#endif
#endif
}
#endif
static void replace_string(string& haystack, const string& needle, const string& other)
{
size_t i;
while((i = haystack.find(needle)) != string::npos)
haystack.replace(i, needle.length(), other);
}
string system_cpu_brand_string()
{
char buf[48];
int result[4];
__cpuid(result, 0x80000000);
if(result[0] >= (int)0x80000004) {
__cpuid((int*)(buf+0), 0x80000002);
__cpuid((int*)(buf+16), 0x80000003);
__cpuid((int*)(buf+32), 0x80000004);
string brand = buf;
/* make it a bit more presentable */
replace_string(brand, "(TM)", "");
replace_string(brand, "(R)", "");
size_t i;
if((i = brand.find(" ")) != string::npos)
brand = brand.substr(0, i);
return brand;
}
return "Unknown CPU";
}
int system_cpu_bits()
{
return (sizeof(void*)*8);
}
#if defined(__x86_64__) || defined(_M_X64) || defined(i386) || defined(_M_IX86)
struct CPUCapabilities {
bool x64;
bool mmx;
bool sse;
bool sse2;
bool sse3;
bool ssse3;
bool sse41;
bool sse42;
bool sse4a;
bool avx;
bool xop;
bool fma3;
bool fma4;
};
static CPUCapabilities& system_cpu_capabilities()
{
static CPUCapabilities caps;
static bool caps_init = false;
if(!caps_init) {
int result[4], num; //, num_ex;
memset(&caps, 0, sizeof(caps));
__cpuid(result, 0);
num = result[0];
#if 0
__cpuid(result, 0x80000000);
num_ex = result[0];
#endif
if(num >= 1) {
__cpuid(result, 0x00000001);
caps.mmx = (result[3] & ((int)1 << 23)) != 0;
caps.sse = (result[3] & ((int)1 << 25)) != 0;
caps.sse2 = (result[3] & ((int)1 << 26)) != 0;
caps.sse3 = (result[2] & ((int)1 << 0)) != 0;
caps.ssse3 = (result[2] & ((int)1 << 9)) != 0;
caps.sse41 = (result[2] & ((int)1 << 19)) != 0;
caps.sse42 = (result[2] & ((int)1 << 20)) != 0;
caps.avx = (result[2] & ((int)1 << 28)) != 0;
caps.fma3 = (result[2] & ((int)1 << 12)) != 0;
}
#if 0
if(num_ex >= 0x80000001) {
__cpuid(result, 0x80000001);
caps.x64 = (result[3] & ((int)1 << 29)) != 0;
caps.sse4a = (result[2] & ((int)1 << 6)) != 0;
caps.fma4 = (result[2] & ((int)1 << 16)) != 0;
caps.xop = (result[2] & ((int)1 << 11)) != 0;
}
#endif
caps_init = true;
}
return caps;
}
bool system_cpu_support_sse2()
{
CPUCapabilities& caps = system_cpu_capabilities();
return caps.sse && caps.sse2;
}
bool system_cpu_support_sse3()
{
CPUCapabilities& caps = system_cpu_capabilities();
return caps.sse && caps.sse2 && caps.sse3 && caps.ssse3;
}
bool system_cpu_support_sse41()
{
CPUCapabilities& caps = system_cpu_capabilities();
return caps.sse && caps.sse2 && caps.sse3 && caps.ssse3 && caps.sse41;
}
#else
bool system_cpu_support_sse2()
{
return false;
}
bool system_cpu_support_sse3()
{
return false;
}
#endif
CCL_NAMESPACE_END
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