diff options
| author | Steven Bosscher <steven@gcc.gnu.org> | 2012-06-17 21:01:25 +0000 |
|---|---|---|
| committer | Steven Bosscher <steven@gcc.gnu.org> | 2012-06-17 21:01:25 +0000 |
| commit | 46d33ae927892aa2fbec97dfa90f7bd9a055a1bb (patch) | |
| tree | a4d54b10f7c0db155dd485fd849fee5c27f1b77c /gcc/hwint.h | |
| parent | 0df965d73f62798d8b9288a27c351502edbb1831 (diff) | |
expmed.c (ceil_log2): Move from here...
* expmed.c (ceil_log2): Move from here...
* hwint.c: ... to here for older GCCs...
* hwint.h: ... and here for newer GCCs.
* rtl.h (ceil_log2): Remove prototype.
* tree-phinodes.c: Do not include rtl.h.
* Makefile.in (tree-phinodes.o): Do not depend on RTL_H.
From-SVN: r188710
Diffstat (limited to 'gcc/hwint.h')
| -rw-r--r-- | gcc/hwint.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/hwint.h b/gcc/hwint.h index 17346392f91..00c9538fb11 100644 --- a/gcc/hwint.h +++ b/gcc/hwint.h @@ -185,6 +185,9 @@ extern int exact_log2 (unsigned HOST_WIDE_INT); /* Return floor of log2, with -1 for zero. */ extern int floor_log2 (unsigned HOST_WIDE_INT); +/* Return the smallest n such that 2**n >= X. */ +extern int ceil_log2 (unsigned HOST_WIDE_INT); + #else /* GCC_VERSION >= 3004 */ /* For convenience, define 0 -> word_size. */ @@ -235,6 +238,12 @@ floor_log2 (unsigned HOST_WIDE_INT x) } static inline int +ceil_log2 (unsigned HOST_WIDE_INT x) +{ + return floor_log2 (x - 1) + 1; +} + +static inline int exact_log2 (unsigned HOST_WIDE_INT x) { return x == (x & -x) && x ? ctz_hwi (x) : -1; |