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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
commit | 2de9abc5c9d40b3c716307d67d16146f823fd554 (patch) | |
tree | 6979db67934ddc8b564150b465846a383b428ff8 /gnulib/lib/count-one-bits.h | |
parent | 33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff) | |
download | patch-baserock/bootstrap-pass2.tar.gz |
add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap
Diffstat (limited to 'gnulib/lib/count-one-bits.h')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/lib/count-one-bits.h | 77 |
2 files changed, 77 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/lib/count-one-bits.h b/gnulib/lib/count-one-bits.h new file mode 100644 index 0000000..093165c --- /dev/null +++ b/gnulib/lib/count-one-bits.h @@ -0,0 +1,77 @@ +/* count-one-bits.h -- counts the number of 1-bits in a word. + Copyright (C) 2007-2011 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +/* Written by Ben Pfaff. */ + +#ifndef COUNT_ONE_BITS_H +# define COUNT_ONE_BITS_H 1 + +#include <stdlib.h> +#include "verify.h" + +/* Expand the code which computes the number of 1-bits of the local + variable 'x' of type TYPE (an unsigned integer type) and returns it + from the current function. */ +#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) +#define COUNT_ONE_BITS(BUILTIN, TYPE) \ + return BUILTIN (x); +#else +#define COUNT_ONE_BITS(BUILTIN, TYPE) \ + /* This condition is written so as to avoid shifting by more than \ + 31 bits at once, and also avoids a random HP-UX cc bug. */ \ + verify (((TYPE) -1 >> 31 >> 31 >> 2) == 0); /* TYPE has at most 64 bits */ \ + int count = count_one_bits_32 (x); \ + if (1 < (TYPE) -1 >> 31) /* TYPE has more than 32 bits? */ \ + count += count_one_bits_32 (x >> 31 >> 1); \ + return count; + +/* Compute and return the number of 1-bits set in the least + significant 32 bits of X. */ +static inline int +count_one_bits_32 (unsigned int x) +{ + x = ((x & 0xaaaaaaaaU) >> 1) + (x & 0x55555555U); + x = ((x & 0xccccccccU) >> 2) + (x & 0x33333333U); + x = (x >> 16) + (x & 0xffff); + x = ((x & 0xf0f0) >> 4) + (x & 0x0f0f); + return (x >> 8) + (x & 0x00ff); +} +#endif + +/* Compute and return the number of 1-bits set in X. */ +static inline int +count_one_bits (unsigned int x) +{ + COUNT_ONE_BITS (__builtin_popcount, unsigned int); +} + +/* Compute and return the number of 1-bits set in X. */ +static inline int +count_one_bits_l (unsigned long int x) +{ + COUNT_ONE_BITS (__builtin_popcountl, unsigned long int); +} + +#if HAVE_UNSIGNED_LONG_LONG_INT +/* Compute and return the number of 1-bits set in X. */ +static inline int +count_one_bits_ll (unsigned long long int x) +{ + COUNT_ONE_BITS (__builtin_popcountll, unsigned long long int); +} +#endif + +#endif /* COUNT_ONE_BITS_H */ |