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60 lines
2.4 KiB
C
60 lines
2.4 KiB
C
/*
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* Copyright 1999-2016 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <openssl/crypto.h>
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/*
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* Engage compiler specific rotate intrinsic function if available.
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*/
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#undef ROL32
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#ifndef PEDANTIC
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# if defined(_MSC_VER)
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# define ROL32(a,n) _lrotl(a,n)
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# elif defined(__ICC)
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# define ROL32(a,n) _rotl(a,n)
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# elif defined(__GNUC__) && __GNUC__>=2 && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM)
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/*
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* Some GNU C inline assembler templates. Note that these are
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* rotates by *constant* number of bits! But that's exactly
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* what we need here...
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* <appro@fy.chalmers.se>
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*/
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# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
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# define ROL32(a,n) ({ register unsigned int ret; \
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asm ( \
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"roll %1,%0" \
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: "=r"(ret) \
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: "I"(n), "0"((unsigned int)(a)) \
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: "cc"); \
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ret; \
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})
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# elif defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
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defined(__powerpc) || defined(__ppc__) || defined(__powerpc64__)
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# define ROL32(a,n) ({ register unsigned int ret; \
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asm ( \
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"rlwinm %0,%1,%2,0,31" \
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: "=r"(ret) \
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: "r"(a), "I"(n)); \
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ret; \
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})
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# elif defined(__s390x__)
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# define ROL32(a,n) ({ register unsigned int ret; \
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asm ("rll %0,%1,%2" \
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: "=r"(ret) \
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: "r"(a), "I"(n)); \
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ret; \
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})
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# endif
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# endif
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#endif /* PEDANTIC */
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#ifndef ROL32
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# define ROL32(a,n) (((a)<<(n))|(((a)&0xffffffff)>>(32-(n))))
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#endif
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