view modules/count-one-bits @ 17503:d78ea0b1af11

count-one-bits: port to MSC; support types wider than 64 bits The ideas behind the MSC port are stolen from Emacs. * lib/count-one-bits.c (popcount_support) [_MSC_VER]: New variable. * lib/count-one-bits.h: Include limits.h, for CHAR_BIT. Don't include verify.h: it's no longer needed, as types wider than 64 bits are now supported. (COUNT_ONE_BITS_GENERIC): New macro. (popcount_supported) [_MSC_VER]: New inline function. (COUNT_ONE_BITS): Use it. New arg MSC_BUILTIN, for better performance with MSC. All uses changed. Do not assume that TYPE has at most 64 bits. * modules/count-one-bits (Depends-on): Do not depend on 'verify'.
author Paul Eggert <eggert@cs.ucla.edu>
date Sun, 06 Oct 2013 23:43:43 -0700
parents 7178d4d98ee5
children
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Description:
Counts the number of 1-bits in a word.

Files:
lib/count-one-bits.c
lib/count-one-bits.h
m4/count-one-bits.m4

Depends-on:
extern-inline

configure.ac:
gl_COUNT_ONE_BITS

Makefile.am:
lib_SOURCES += count-one-bits.c

Include:
"count-one-bits.h"

License:
LGPLv2+

Maintainer:
Ben Pfaff