| Ben Murdoch | 097c5b2 | 2016-05-18 11:27:45 +0100 | [diff] [blame] | 1 | /*===---- lzcntintrin.h - LZCNT intrinsics ---------------------------------=== |
| 2 | * |
| 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 4 | * of this software and associated documentation files (the "Software"), to deal |
| 5 | * in the Software without restriction, including without limitation the rights |
| 6 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 7 | * copies of the Software, and to permit persons to whom the Software is |
| 8 | * furnished to do so, subject to the following conditions: |
| 9 | * |
| 10 | * The above copyright notice and this permission notice shall be included in |
| 11 | * all copies or substantial portions of the Software. |
| 12 | * |
| 13 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 14 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 15 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 16 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 17 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 18 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 19 | * THE SOFTWARE. |
| 20 | * |
| 21 | *===-----------------------------------------------------------------------=== |
| 22 | */ |
| 23 | |
| 24 | #if !defined __X86INTRIN_H && !defined __IMMINTRIN_H |
| 25 | #error "Never use <lzcntintrin.h> directly; include <x86intrin.h> instead." |
| 26 | #endif |
| 27 | |
| 28 | #ifndef __LZCNTINTRIN_H |
| 29 | #define __LZCNTINTRIN_H |
| 30 | |
| 31 | /* Define the default attributes for the functions in this file. */ |
| 32 | #define __DEFAULT_FN_ATTRS __attribute__((__always_inline__, __nodebug__, __target__("lzcnt"))) |
| 33 | |
| 34 | static __inline__ unsigned short __DEFAULT_FN_ATTRS |
| 35 | __lzcnt16(unsigned short __X) |
| 36 | { |
| 37 | return __X ? __builtin_clzs(__X) : 16; |
| 38 | } |
| 39 | |
| 40 | static __inline__ unsigned int __DEFAULT_FN_ATTRS |
| 41 | __lzcnt32(unsigned int __X) |
| 42 | { |
| 43 | return __X ? __builtin_clz(__X) : 32; |
| 44 | } |
| 45 | |
| 46 | static __inline__ unsigned int __DEFAULT_FN_ATTRS |
| 47 | _lzcnt_u32(unsigned int __X) |
| 48 | { |
| 49 | return __X ? __builtin_clz(__X) : 32; |
| 50 | } |
| 51 | |
| 52 | #ifdef __x86_64__ |
| 53 | static __inline__ unsigned long long __DEFAULT_FN_ATTRS |
| 54 | __lzcnt64(unsigned long long __X) |
| 55 | { |
| 56 | return __X ? __builtin_clzll(__X) : 64; |
| 57 | } |
| 58 | |
| 59 | static __inline__ unsigned long long __DEFAULT_FN_ATTRS |
| 60 | _lzcnt_u64(unsigned long long __X) |
| 61 | { |
| 62 | return __X ? __builtin_clzll(__X) : 64; |
| 63 | } |
| 64 | #endif |
| 65 | |
| 66 | #undef __DEFAULT_FN_ATTRS |
| 67 | |
| 68 | #endif /* __LZCNTINTRIN_H */ |