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      1 // -*- C++ -*-
      2 //===-----------------------------------------------------------------------===//
      3 //
      4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      5 // See https://llvm.org/LICENSE.txt for license information.
      6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #ifndef _LIBCPP_SUPPORT_IBM_SUPPORT_H
     11 #define _LIBCPP_SUPPORT_IBM_SUPPORT_H
     12 
     13 extern "builtin" int __popcnt4(unsigned int);
     14 extern "builtin" int __popcnt8(unsigned long long);
     15 extern "builtin" unsigned int __cnttz4(unsigned int);
     16 extern "builtin" unsigned int __cnttz8(unsigned long long);
     17 extern "builtin" unsigned int __cntlz4(unsigned int);
     18 extern "builtin" unsigned int __cntlz8(unsigned long long);
     19 
     20 // Builtin functions for counting population
     21 #define __builtin_popcount(x) __popcnt4(x)
     22 #define __builtin_popcountll(x) __popcnt8(x)
     23 #if defined(__64BIT__)
     24 #define __builtin_popcountl(x) __builtin_popcountll(x)
     25 #else
     26 #define __builtin_popcountl(x) __builtin_popcount(x)
     27 #endif
     28 
     29 // Builtin functions for counting trailing zeros
     30 #define __builtin_ctz(x) __cnttz4(x)
     31 #define __builtin_ctzll(x) __cnttz8(x)
     32 #if defined(__64BIT__)
     33 #define __builtin_ctzl(x) __builtin_ctzll(x)
     34 #else
     35 #define __builtin_ctzl(x) __builtin_ctz(x)
     36 #endif
     37 
     38 // Builtin functions for counting leading zeros
     39 #define __builtin_clz(x) __cntlz4(x)
     40 #define __builtin_clzll(x) __cntlz8(x)
     41 #if defined(__64BIT__)
     42 #define __builtin_clzl(x) __builtin_clzll(x)
     43 #else
     44 #define __builtin_clzl(x) __builtin_clz(x)
     45 #endif
     46 
     47 #if defined(__64BIT__)
     48 #define __SIZE_WIDTH__ 64
     49 #else
     50 #define __SIZE_WIDTH__ 32
     51 #endif
     52 
     53 #endif // _LIBCPP_SUPPORT_IBM_SUPPORT_H
     54