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* sysdeps/unix/sysv/linux/sys/param.h (howmany): Optimize for gcc.
This commit is contained in:
Ulrich Drepper
2003-06-14 05:18:31 +00:00
parent 2533775393
commit da4fef4bc3
2 changed files with 12 additions and 4 deletions
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14
sysdeps/unix/sysv/linux/sys/param.h
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@ -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))