| // Copyright 2015 The Go Authors. All rights reserved. | |
| // Use of this source code is governed by a BSD-style | |
| // license that can be found in the LICENSE file. | |
| // +build gccgo | |
| #include <errno.h> | |
| #include <stdint.h> | |
| #include <unistd.h> | |
| #define _STRINGIFY2_(x) #x | |
| #define _STRINGIFY_(x) _STRINGIFY2_(x) | |
| #define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__) | |
| extern intptr_t popcount(uintptr_t x) __asm__(GOSYM_PREFIX GOPKGPATH ".popcount"); | |
| intptr_t popcount(uintptr_t x) { | |
| return __builtin_popcountl((unsigned long)(x)); | |
| } |