diff options
| -rw-r--r-- | ChangeLog | 2 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sys/param.h | 14 |
2 files changed, 12 insertions, 4 deletions
@@ -1,5 +1,7 @@ 2003-06-13 Ulrich Drepper <drepper@redhat.com> + * sysdeps/unix/sysv/linux/sys/param.h (howmany): Optimize for gcc. + Fixing gcc 3.3 warnings, part II. * argp/argp-help.c (hol_entry_long_iterate): Always inline. * elf/dl-load.c (cache_rpath): Don't inline. diff --git a/sysdeps/unix/sysv/linux/sys/param.h b/sysdeps/unix/sysv/linux/sys/param.h index d64f4b9a98..0b0424eb90 100644 --- a/sysdeps/unix/sysv/linux/sys/param.h +++ b/sysdeps/unix/sysv/linux/sys/param.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1995, 1996, 1997, 2000, 2001 Free Software Foundation, Inc. +/* Copyright (C) 1995,1996,1997,2000,2001,2003 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -49,10 +49,16 @@ /* Macros for counting and rounding. */ #ifndef howmany -# define howmany(x, y) (((x)+((y)-1))/(y)) +# define howmany(x, y) (((x) + ((y) - 1)) / (y)) #endif -#define roundup(x, y) ((((x)+((y)-1))/(y))*(y)) -#define powerof2(x) ((((x)-1)&(x))==0) +#ifdef __GNUC__ +# define roundup(x, y) (__builtin_constant_p (y) && powerof2 (y) \ + ? (((x) + (y) - 1) & ~((y) - 1)) \ + : ((((x) + ((y) - 1)) / (y)) * (y))) +#else +# define roundup(x, y) ((((x) + ((y) - 1)) / (y)) * (y)) +#endif +#define powerof2(x) ((((x) - 1) & (x)) == 0) /* Macros for min/max. */ #define MIN(a,b) (((a)<(b))?(a):(b)) |