Changeset 4c4e444 for libcfa/src/math.hfa
- Timestamp:
- Apr 13, 2021, 5:38:34 PM (3 years ago)
- Branches:
- ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast-unique-expr, pthread-emulation, qualifiedEnum
- Children:
- fd4c009
- Parents:
- 88ac8672
- File:
-
- 1 edited
Legend:
- Unmodified
- Added
- Removed
-
libcfa/src/math.hfa
r88ac8672 r4c4e444 10 10 // Created On : Mon Apr 18 23:37:04 2016 11 11 // Last Modified By : Peter A. Buhr 12 // Last Modified On : Mon A ug 24 08:56:20 202013 // Update Count : 1 2612 // Last Modified On : Mon Apr 12 18:35:39 2021 13 // Update Count : 131 14 14 // 15 15 … … 100 100 long double _Complex log( long double _Complex x ) { return clogl( x ); } 101 101 102 // O(1) polymorphic integer log2, using clz, which returns the number of leading 0-bits, starting at the most 103 // significant bit (single instruction on x86) 104 int log2( unsigned int n ) { return n == 0 ? -1 : sizeof(n) * __CHAR_BIT__ - 1 - __builtin_clz( n ); } 105 long int log2( unsigned long int n ) { return n == 0 ? -1 : sizeof(n) * __CHAR_BIT__ - 1 - __builtin_clzl( n ); } 106 long long int log2( unsigned long long int n ) { return n == 0 ? -1 : sizeof(n) * __CHAR_BIT__ - 1 - __builtin_clzl( n ); } 102 107 float log2( float x ) { return log2f( x ); } 103 108 // extern "C" { double log2( double ); }
Note: See TracChangeset
for help on using the changeset viewer.