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- /* ===================================================================
- *
- * Copyright (c) 2014, Legrandin <helderijs@gmail.com>
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- * ===================================================================
- */
- #include "common.h"
- FAKE_INIT(cpuid_c)
- #if defined HAVE_CPUID_H
- #include <cpuid.h>
- #elif defined HAVE_INTRIN_H
- #include <intrin.h>
- #endif
- /** Call X86 CPUID for Leaf 1: return CX **/
- static uint32_t leaf1_ecx(void)
- {
- uint32_t info[4];
- memset(info, 0, sizeof info);
- #if defined(HAVE_CPUID_H)
- __get_cpuid(1, info, info+1, info+2, info+3);
- #elif defined(HAVE_INTRIN_H)
- __cpuidex(info, 1, 0);
- #endif
- return info[2];
- }
- /** Return 1 if the CPU supports the AESNI extension **/
- EXPORT_SYM int have_aes_ni(void)
- {
- uint32_t ecx;
- ecx = leaf1_ecx();
- return (ecx & (1UL<<25)) ? 1 : 0;
- }
- /** Return non-zero if the CPU supports the PCLMULQDQ instruction (carry-less
- * multiplication). **/
- EXPORT_SYM int have_clmul(void)
- {
- uint32_t ecx;
- ecx = leaf1_ecx();
- return (ecx >> 1) & 1;
- }
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