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| author | Peter Maydell <peter.maydell@linaro.org> | 2015-07-24 13:33:12 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2015-09-07 14:19:01 +0100 |
| commit | 8f1ed5f5081416d5d1cc9569aa826114c5b21213 (patch) | |
| tree | 5572cb1ed9a1142cdbc77fe1fdb43de20b0e677b /util/cutils.c | |
| parent | 10944a19209bb520054569e0f156f50338901264 (diff) | |
| download | qemu-8f1ed5f5081416d5d1cc9569aa826114c5b21213.tar.gz qemu-8f1ed5f5081416d5d1cc9569aa826114c5b21213.tar.bz2 qemu-8f1ed5f5081416d5d1cc9569aa826114c5b21213.zip | |
Make pow2ceil() and pow2floor() inline
Since the pow2floor() function is now used in a hot code path,
make it inline; for consistency, provide pow2ceil() as an inline
function too.
Because these functions use ctz64() we have to put the inline
versions into host-utils.h, so they have access to ctz64(),
and move the inline is_power_of_2() along with them.
We then need to include host-utils.h from qemu-common.h so that
the files which use these functions via qemu-common.h still have
access to them.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1437741192-20955-7-git-send-email-peter.maydell@linaro.org
Diffstat (limited to 'util/cutils.c')
| -rw-r--r-- | util/cutils.c | 23 |
1 files changed, 0 insertions, 23 deletions
diff --git a/util/cutils.c b/util/cutils.c index 43aafde8a5..923445267f 100644 --- a/util/cutils.c +++ b/util/cutils.c @@ -469,29 +469,6 @@ int qemu_parse_fd(const char *param) return fd; } -/* round down to the nearest power of 2*/ -int64_t pow2floor(int64_t value) -{ - if (!is_power_of_2(value)) { - value = 0x8000000000000000ULL >> clz64(value); - } - return value; -} - -/* round up to the nearest power of 2 (0 if overflow) */ -uint64_t pow2ceil(uint64_t value) -{ - uint8_t nlz = clz64(value); - - if (is_power_of_2(value)) { - return value; - } - if (!nlz) { - return 0; - } - return 1ULL << (64 - nlz); -} - /* * Implementation of ULEB128 (http://en.wikipedia.org/wiki/LEB128) * Input is limited to 14-bit numbers |