Ignore:
Timestamp:
Apr 15, 2020, 11:05:32 AM (3 years ago)
Author:
Thierry Delisle <tdelisle@…>
Branches:
arm-eh, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum
Children:
21923bd, 912ccbcf
Parents:
5569a31 (diff), 391aa0e (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the (diff) links above to see all the changes relative to each parent.
Message:

Merge branch 'master' of plg.uwaterloo.ca:software/cfa/cfa-cc

File:
1 edited

Legend:

Unmodified
Added
Removed

  • libcfa/src/bitmanip.hfa

    r5569a31 r4ea5308  
    1111// Created On       : Sat Mar 14 18:12:27 2020
    1212// Last Modified By : Peter A. Buhr
    13 // Last Modified On : Mon Apr  6 22:17:19 2020
    14 // Update Count     : 78
     13// Last Modified On : Mon Apr 13 22:37:03 2020
     14// Update Count     : 110
    1515//
    1616
    … …  
    6767
    6868    // Find most significiant zero bit.
    69     unsigned int high0( unsigned char n ) { return n != (typeof(n))-1 ? __bitsizeof(unsigned int) - __builtin_clz( (typeof(n))~n ) : 0; }
    70     unsigned int high0( unsigned short int n ) { return n != (typeof(n))-1 ? __bitsizeof(unsigned int) - __builtin_clz( (typeof(n))~n ) : 0; }
    71     unsigned int high0( unsigned int n ) { return n != -1 ? __bitsizeof(n) - __builtin_clz( ~n ) : 0; }
    72     unsigned int high0( unsigned long int n ) { return n != -1 ? __bitsizeof(n) - __builtin_clzl( ~n ) : 0; }
    73     unsigned int high0( unsigned long long int n ) { return n != -1 ? __bitsizeof(n) - __builtin_clzll( ~n ) : 0; }
     69    unsigned int high0( unsigned char n ) { return n == (typeof(n))-1 ? 0 : __bitsizeof(unsigned int) - __builtin_clz( (typeof(n))~n ); }
     70    unsigned int high0( unsigned short int n ) { return n == (typeof(n))-1 ? 0 : __bitsizeof(unsigned int) - __builtin_clz( (typeof(n))~n ); }
     71    unsigned int high0( unsigned int n ) { return n == -1 ? 0 : __bitsizeof(n) - __builtin_clz( ~n ); }
     72    unsigned int high0( unsigned long int n ) { return n == -1 ? 0 : __bitsizeof(n) - __builtin_clzl( ~n ); }
     73    unsigned int high0( unsigned long long int n ) { return n == -1 ? 0 : __bitsizeof(n) - __builtin_clzll( ~n ); }
    7474
    7575    // Find most significiant one bit.
    76     unsigned int high1( unsigned char n ) { return n != 0 ? __bitsizeof(unsigned int) - __builtin_clz( n ) : 0; }
    77     unsigned int high1( unsigned short int n ) { return n != 0 ? __bitsizeof(unsigned int) - __builtin_clz( n ) : 0; }
    78     unsigned int high1( unsigned int n ) { return n != 0 ? __bitsizeof(n) - __builtin_clz( n ) : 0; }
    79     unsigned int high1( unsigned long int n ) { return n != 0 ? __bitsizeof(n) - __builtin_clzl( n ) : 0; }
    80     unsigned int high1( unsigned long long int n ) { return n != 0 ? __bitsizeof(n) - __builtin_clzll( n ) : 0; }
     76    unsigned int high1( unsigned char n ) { return n == 0 ? 0 : __bitsizeof(unsigned int) - __builtin_clz( n ); }
     77    unsigned int high1( unsigned short int n ) { return n == 0 ? 0 : __bitsizeof(unsigned int) - __builtin_clz( n ); }
     78    unsigned int high1( unsigned int n ) { return n == 0 ? 0 : __bitsizeof(n) - __builtin_clz( n ); }
     79    unsigned int high1( unsigned long int n ) { return n == 0 ? 0 : __bitsizeof(n) - __builtin_clzl( n ); }
     80    unsigned int high1( unsigned long long int n ) { return n == 0 ? 0 : __bitsizeof(n) - __builtin_clzll( n ); }
    8181
    82     // Check for power of 2, clears bits below value, rounding down to the next lower multiple of value.
    83     bool is_pow2( int value ) { return (value & (value - 1)) == 0; }
    84     bool is_pow2( unsigned long long int value ) { return (value & (value - 1)) == 0; }
     82    // Check for power of 2, clears bits below n, rounding down to the next lower multiple of n.
     83    bool is_pow2( unsigned char n ) { return n == 0 ? false : (n & (n - 1)) == 0; }
     84    bool is_pow2( unsigned short int n ) { return n == 0 ? false : (n & (n - 1)) == 0; }
     85    bool is_pow2( unsigned int n ) { return n == 0 ? false : (n & (n - 1)) == 0; }
     86    bool is_pow2( unsigned long int n ) { return n == 0 ? false : (n & (n - 1)) == 0; }
     87    bool is_pow2( unsigned long long int n ) { return n == 0 ? false : (n & (n - 1)) == 0; }
    8588
    86     // Returns value aligned at the floor of align, clear bits above or equal to align, giving value % align.
    87     unsigned int floor2( unsigned int value, unsigned int align ) { assert( is_pow2( align ) ); return value & -align; }
    88     unsigned long long int floor2( unsigned long long int value, unsigned long long int align ) { assert( is_pow2( align ) ); return value & -align; }
     89    // Returns n aligned at the floor of align, clear bits above or equal to align, giving n % align.
     90    // signed char floor2( signed char n, signed char align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     91    // unsigned char floor2( unsigned char n, unsigned char align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     92    // short int floor2( short int n, unsigned short int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     93    // unsigned short int floor2( unsigned short int n, unsigned short int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     94    // int floor2( int n, unsigned int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     95    // unsigned int floor2( unsigned int n, unsigned int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     96    // long int floor2( long int n, unsigned long int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     97    // unsigned long int floor2( unsigned long int n, unsigned long int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     98        // long long int floor2( long long int n, unsigned long long int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
     99    // unsigned long long int floor2( unsigned long long int n, unsigned long long int align ) { /*assert( is_pow2( align ) );*/ return n & -align; }
    89100
    90     unsigned int floor( unsigned int value, unsigned int align ) { return value / align * align; }
    91     unsigned long long int floor( unsigned long long int value, unsigned long long int align ) { return value / align * align; }
     101        forall( otype T | { T ?&?( T, T ); T -?( T ); } )
     102        T floor2( T n, T align ) { /* assert( is_pow2( align ) ); */ return n & -align; }
    92103
    93     // Returns value aligned at the ceiling of align, negate, round down, negate is the same as round up.
    94     unsigned int ceiling2( unsigned int value, unsigned int align ) { assert( is_pow2( align ) ); return -floor2( -value, align ); }
    95     unsigned long long int ceiling2( unsigned long long int value, unsigned long long int align ) { assert( is_pow2( align ) ); return -floor2( -value, align ); }
     104        forall( otype T | { T ?/?( T, T ); T ?*?( T, T ); } )
     105        T floor( T n, T align ) { return n / align * align; }
    96106
    97     unsigned int ceiling( unsigned int value, unsigned int align ) { return (value + (align - 1)) / align; }
    98     unsigned long long int ceiling( unsigned long long int value, unsigned long long int align ) { return (value + (align - 1)) / align; }
     107    // Returns n aligned at the ceiling of align, negate, round down, negate is the same as round up.
     108        forall( otype T | { T floor2( T, T ); T -?( T ); } )
     109        T ceiling2( T n, T align ) { /* assert( is_pow2( align ) ); */ return -floor2( -n, align ); }
     110
     111        forall( otype T | { void ?{}( T &, one_t ); T ?+?( T, T ); T ?-?( T, T ); T ?/?( T, T ); } )
     112        T ceiling( T n, T align ) { return (n + (align - (T){1})) / align; }
    99113} // distribution
    100114
Note: See TracChangeset for help on using the changeset viewer.