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| author | Kaveh R. Ghazi <ghazi@caip.rutgers.edu> | 2001-10-21 19:44:08 +0000 |
|---|---|---|
| committer | Kaveh Ghazi <ghazi@gcc.gnu.org> | 2001-10-21 19:44:08 +0000 |
| commit | 5297e08564adcb6d396d0870df9c1df1d2c6aab9 (patch) | |
| tree | 50a7ccac927ff3fce5b7e2bad6d5a896b3c10f83 /gcc/system.h | |
| parent | 77c068446e143cc8f95e276eadee7528f3142105 (diff) | |
| download | gcc-5297e08564adcb6d396d0870df9c1df1d2c6aab9.zip gcc-5297e08564adcb6d396d0870df9c1df1d2c6aab9.tar.gz gcc-5297e08564adcb6d396d0870df9c1df1d2c6aab9.tar.bz2 | |
arm.h (FUNCTION_ARG_REGNO_P): Use IN_RANGE.
* arm.h (FUNCTION_ARG_REGNO_P): Use IN_RANGE.
* system.h (IN_RANGE): New macro.
From-SVN: r46395
Diffstat (limited to 'gcc/system.h')
| -rw-r--r-- | gcc/system.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/system.h b/gcc/system.h index 55a9370..7cf3b5f 100644 --- a/gcc/system.h +++ b/gcc/system.h @@ -168,6 +168,16 @@ extern int errno; /* Get definitions of HOST_WIDE_INT and HOST_WIDEST_INT. */ #include "hwint.h" +/* A macro to determine whether a VALUE lies inclusively within a + certain range without evaluating the VALUE more than once. This + macro won't warn if the VALUE is unsigned and the LOWER bound is + zero, as it would e.g. with "VALUE >= 0 && ...". Note the LOWER + bound *is* evaluated twice, and LOWER must not be greater than + UPPER. However the bounds themselves can be either positive or + negative. */ +#define IN_RANGE(VALUE, LOWER, UPPER) \ + ((unsigned HOST_WIDE_INT)((VALUE) - (LOWER)) <= ((UPPER) - (LOWER))) + /* Infrastructure for defining missing _MAX and _MIN macros. Note that macros defined with these cannot be used in #if. */ |