| Howard Hinnant | 5d1a701 | 2013-08-14 18:00:20 +0000 | [diff] [blame] | 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); |
| Marshall Clow | 028875a | 2013-11-19 19:16:03 +0000 | [diff] [blame] | 18 | extern "builtin" unsigned int __cntlz4(unsigned int); |
| Howard Hinnant | 5d1a701 | 2013-08-14 18:00:20 +0000 | [diff] [blame] | 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 |