1 // -*- C++ -*- 2 //===----------------------- support/ibm/support.h ----------------------===// 3 // 4 // The LLVM Compiler Infrastructure 5 // 6 // This file is dual licensed under the MIT and the University of Illinois Open 7 // Source Licenses. See LICENSE.TXT for details. 8 // 9 //===----------------------------------------------------------------------===// 10 11 #ifndef _LIBCPP_SUPPORT_IBM_SUPPORT_H 12 #define _LIBCPP_SUPPORT_IBM_SUPPORT_H 13 14 extern "builtin" int __popcnt4(unsigned int); 15 extern "builtin" int __popcnt8(unsigned long long); 16 extern "builtin" unsigned int __cnttz4(unsigned int); 17 extern "builtin" unsigned int __cnttz8(unsigned long long); 18 extern "builtin" unsigned int __cntlz4(unsigned int); 19 extern "builtin" unsigned int __cntlz8(unsigned long long); 20 21 // Builtin functions for counting population 22 #define __builtin_popcount(x) __popcnt4(x) 23 #define __builtin_popcountll(x) __popcnt8(x) 24 #if defined(__64BIT__) 25 #define __builtin_popcountl(x) __builtin_popcountll(x) 26 #else 27 #define __builtin_popcountl(x) __builtin_popcount(x) 28 #endif 29 30 // Builtin functions for counting trailing zeros 31 #define __builtin_ctz(x) __cnttz4(x) 32 #define __builtin_ctzll(x) __cnttz8(x) 33 #if defined(__64BIT__) 34 #define __builtin_ctzl(x) __builtin_ctzll(x) 35 #else 36 #define __builtin_ctzl(x) __builtin_ctz(x) 37 #endif 38 39 // Builtin functions for counting leading zeros 40 #define __builtin_clz(x) __cntlz4(x) 41 #define __builtin_clzll(x) __cntlz8(x) 42 #if defined(__64BIT__) 43 #define __builtin_clzl(x) __builtin_clzll(x) 44 #else 45 #define __builtin_clzl(x) __builtin_clz(x) 46 #endif 47 48 #if defined(__64BIT__) 49 #define __SIZE_WIDTH__ 64 50 #else 51 #define __SIZE_WIDTH__ 32 52 #endif 53 54 #endif // _LIBCPP_SUPPORT_IBM_SUPPORT_H 55
