55 lines
1.6 KiB
C++
55 lines
1.6 KiB
C++
// -*- C++ -*-
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//===----------------------- support/ibm/support.h ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_SUPPORT_IBM_SUPPORT_H
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#define _LIBCPP_SUPPORT_IBM_SUPPORT_H
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extern "builtin" int __popcnt4(unsigned int);
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extern "builtin" int __popcnt8(unsigned long long);
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extern "builtin" unsigned int __cnttz4(unsigned int);
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extern "builtin" unsigned int __cnttz8(unsigned long long);
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extern "builtin" unsigned int __cntlz4(unsigned int);
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extern "builtin" unsigned int __cntlz8(unsigned long long);
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// Builtin functions for counting population
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#define __builtin_popcount(x) __popcnt4(x)
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#define __builtin_popcountll(x) __popcnt8(x)
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#if defined(__64BIT__)
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#define __builtin_popcountl(x) __builtin_popcountll(x)
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#else
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#define __builtin_popcountl(x) __builtin_popcount(x)
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#endif
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// Builtin functions for counting trailing zeros
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#define __builtin_ctz(x) __cnttz4(x)
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#define __builtin_ctzll(x) __cnttz8(x)
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#if defined(__64BIT__)
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#define __builtin_ctzl(x) __builtin_ctzll(x)
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#else
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#define __builtin_ctzl(x) __builtin_ctz(x)
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#endif
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// Builtin functions for counting leading zeros
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#define __builtin_clz(x) __cntlz4(x)
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#define __builtin_clzll(x) __cntlz8(x)
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#if defined(__64BIT__)
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#define __builtin_clzl(x) __builtin_clzll(x)
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#else
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#define __builtin_clzl(x) __builtin_clz(x)
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#endif
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#if defined(__64BIT__)
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#define __SIZE_WIDTH__ 64
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#else
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#define __SIZE_WIDTH__ 32
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#endif
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#endif // _LIBCPP_SUPPORT_IBM_SUPPORT_H
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