osfmk/corecrypto/ccsha2/src/ccsha256_di.c

   1 /*
   2  *  ccsha256_di.c
   3  *  corecrypto
   4  *
   5  *  Created on 09/18/2012
   6  *
   7  *  Copyright (c) 2012,2014,2015 Apple Inc. All rights reserved.
   8  *
   9  *
  10  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  11  *
  12  * This file contains Original Code and/or Modifications of Original Code
  13  * as defined in and that are subject to the Apple Public Source License
  14  * Version 2.0 (the 'License'). You may not use this file except in
  15  * compliance with the License. The rights granted to you under the License
  16  * may not be used to create, or enable the creation or redistribution of,
  17  * unlawful or unlicensed copies of an Apple operating system, or to
  18  * circumvent, violate, or enable the circumvention or violation of, any
  19  * terms of an Apple operating system software license agreement.
  20  *
  21  * Please obtain a copy of the License at
  22  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  23  *
  24  * The Original Code and all software distributed under the License are
  25  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  26  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  27  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  28  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  29  * Please see the License for the specific language governing rights and
  30  * limitations under the License.
  31  *
  32  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  33  */
  34
  35 #include <corecrypto/ccsha2.h>
  36 #include "ccsha2_internal.h"
  37 #include <corecrypto/cc_runtime_config.h>
  38
  39 #include "corecrypto/fipspost_trace.h"
  40
  41 const struct ccdigest_info *
  42 ccsha256_di(void)
  43 {
  44         FIPSPOST_TRACE_EVENT;
  45
  46 #if  CCSHA2_VNG_INTEL
  47 #if defined (__x86_64__)
  48         if (CC_HAS_AVX512_AND_IN_KERNEL()) {
  49                 return &ccsha256_vng_intel_SupplementalSSE3_di;
  50         } else
  51 #if CC_ACCELERATECRYPTO
  52         { return &ccsha256_vng_intel_di; // use AccelerateCrypto
  53         }
  54 #else
  55         { return CC_HAS_AVX2() ? &ccsha256_vng_intel_AVX2_di :
  56                  ((CC_HAS_AVX1() ? &ccsha256_vng_intel_AVX1_di :
  57                  &ccsha256_vng_intel_SupplementalSSE3_di)); }
  58 #endif
  59 #else
  60         return &ccsha256_vng_intel_SupplementalSSE3_di;
  61 #endif
  62 #elif  CCSHA2_VNG_ARM
  63         return &ccsha256_vng_arm_di;
  64 #elif CCSHA256_ARMV6M_ASM
  65         return &ccsha256_v6m_di;
  66 #else
  67         return &ccsha256_ltc_di;
  68 #endif
  69 }