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| author | Ulrich Drepper <drepper@redhat.com> | 2003-06-14 05:18:31 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2003-06-14 05:18:31 +0000 |
| commit | da4fef4bc3403c7d6f481ec35d7153328e222f9b (patch) | |
| tree | 9cb80bcd8a1cfc6a0a86201e90294d92c6ccb428 /sysdeps/unix/sysv/linux/sys | |
| parent | 2533775393adba65535482cf3a6277774231677d (diff) | |
| download | glibc-da4fef4bc3403c7d6f481ec35d7153328e222f9b.tar.gz glibc-da4fef4bc3403c7d6f481ec35d7153328e222f9b.tar.xz glibc-da4fef4bc3403c7d6f481ec35d7153328e222f9b.zip | |
Update.
* sysdeps/unix/sysv/linux/sys/param.h (howmany): Optimize for gcc.
Diffstat (limited to 'sysdeps/unix/sysv/linux/sys')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sys/param.h | 14 |
1 files changed, 10 insertions, 4 deletions
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)) |