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/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2013,2014 Inktank Storage, Inc.
* Copyright (C) 2014 Cloudwatt <libre.licensing@cloudwatt.com>
*
* Author: Loic Dachary <loic@dachary.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
*/
#include <stdio.h>
#include "arch/probe.h"
/* flags we export */
int ceph_arch_intel_pclmul = 0;
int ceph_arch_intel_sse42 = 0;
int ceph_arch_intel_sse41 = 0;
int ceph_arch_intel_ssse3 = 0;
int ceph_arch_intel_sse3 = 0;
int ceph_arch_intel_sse2 = 0;
int ceph_arch_intel_aesni = 0;
#ifdef __x86_64__
#include <cpuid.h>
/* http://en.wikipedia.org/wiki/CPUID#EAX.3D1:_Processor_Info_and_Feature_Bits */
#define CPUID_PCLMUL (1 << 1)
#define CPUID_SSE42 (1 << 20)
#define CPUID_SSE41 (1 << 19)
#define CPUID_SSSE3 (1 << 9)
#define CPUID_SSE3 (1)
#define CPUID_SSE2 (1 << 26)
#define CPUID_AESNI (1 << 25)
int ceph_arch_intel_probe(void)
{
/* i know how to check this on x86_64... */
unsigned int eax, ebx, ecx = 0, edx = 0;
if (!__get_cpuid(1, &eax, &ebx, &ecx, &edx)) {
return 1;
}
if ((ecx & CPUID_PCLMUL) != 0) {
ceph_arch_intel_pclmul = 1;
}
if ((ecx & CPUID_SSE42) != 0) {
ceph_arch_intel_sse42 = 1;
}
if ((ecx & CPUID_SSE41) != 0) {
ceph_arch_intel_sse41 = 1;
}
if ((ecx & CPUID_SSSE3) != 0) {
ceph_arch_intel_ssse3 = 1;
}
if ((ecx & CPUID_SSE3) != 0) {
ceph_arch_intel_sse3 = 1;
}
if ((edx & CPUID_SSE2) != 0) {
ceph_arch_intel_sse2 = 1;
}
if ((ecx & CPUID_AESNI) != 0) {
ceph_arch_intel_aesni = 1;
}
return 0;
}
#else // __x86_64__
int ceph_arch_intel_probe(void)
{
/* no features */
return 0;
}
#endif // __x86_64__
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