/*
 * Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <openssl/crypto.h>

/*
 * Engage compiler specific rotate intrinsic function if available.
 */
#undef ROL32
#ifndef PEDANTIC
# if defined(_MSC_VER)
#  define ROL32(a,n)   _lrotl(a,n)
# elif defined(__ICC)
#  define ROL32(a,n)   _rotl(a,n)
# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
  /*
   * Some GNU C inline assembler templates. Note that these are
   * rotates by *constant* number of bits! But that's exactly
   * what we need here...
   *                                    <appro@fy.chalmers.se>
   */
#  if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
#   define ROL32(a,n)  ({ register unsigned int ret;   \
                                asm (                   \
                                "roll %1,%0"            \
                                : "=r"(ret)             \
                                : "I"(n), "0"((unsigned int)(a))        \
                                : "cc");                \
                           ret;                         \
                        })
#  elif defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
        defined(__powerpc) || defined(__ppc__) || defined(__powerpc64__)
#   define ROL32(a,n)  ({ register unsigned int ret;   \
                                asm (                   \
                                "rlwinm %0,%1,%2,0,31"  \
                                : "=r"(ret)             \
                                : "r"(a), "I"(n));      \
                           ret;                         \
                        })
#  elif defined(__s390x__)
#   define ROL32(a,n) ({ register unsigned int ret;    \
                                asm ("rll %0,%1,%2"     \
                                : "=r"(ret)             \
                                : "r"(a), "I"(n));      \
                          ret;                          \
                        })
#  endif
# endif
#endif                          /* PEDANTIC */

#ifndef ROL32
# define ROL32(a,n)     (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
#endif