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

1 files changed, 0 insertions, 23 deletions

diff --git a/util/cutils.c b/util/cutils.c
index 43aafde..9234452 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