ROOT-Sim core  3.0.0-rc.2
A General-Purpose Multi-threaded Parallel/Distributed Simulation Library
intrinsics.h
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1 
13 #pragma once
14 
15 #include <assert.h>
16 
26 #define intrinsics_ctz(x) \
27  __extension__({ \
28  assert((x) != 0); \
29  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned), __builtin_ctz(x), \
30  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned long), \
31  __builtin_ctzl(x), \
32  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned long long), \
33  __builtin_ctzll(x), (void)0))); \
34  })
35 
45 #define intrinsics_clz(x) \
46  __extension__({ \
47  assert((x) != 0); \
48  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned), __builtin_clz(x), \
49  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned long), \
50  __builtin_clzl(x), \
51  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned long long), \
52  __builtin_clzll(x), (void)0))); \
53  })
54 
64 #define intrinsics_popcount(x) \
65  __extension__({ \
66  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned), __builtin_popcount(x), \
67  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned long), \
68  __builtin_popcountl(x), \
69  __builtin_choose_expr(__builtin_types_compatible_p(__typeof__(x), unsigned long long), \
70  __builtin_popcountll(x), (void)0))); \
71  })
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