From: Igor Fedotov <igor.fedotov@croit.io>
Date: Mon, 29 Jan 2024 16:21:51 +0000 (+0300)
Subject: include/intarith: introduce p2aligned()
X-Git-Tag: v19.2.3~223^2~6
X-Git-Url: http://git.apps.os.sepia.ceph.com/?a=commitdiff_plain;h=96730b417e57376224c61d67bdb5e307a13bb688;p=ceph.git

include/intarith: introduce p2aligned()

Signed-off-by: Igor Fedotov <igor.fedotov@croit.io>
---

diff --git a/src/include/intarith.h b/src/include/intarith.h
index 92f827d88e580..42bafcf88b4a4 100644
--- a/src/include/intarith.h
+++ b/src/include/intarith.h
@@ -57,6 +57,18 @@ constexpr inline T p2align(T x, T align) {
   return x & -align;
 }
 
+/*
+ * return whether x is aligned with (align)
+ * eg, p2aligned(1200, 1024) ==> false
+ * eg, p2aligned(1024, 1024) ==> true
+ * eg, p2aligned(0x1234, 0x100) ==> false
+ * eg, p2aligned(0x5600, 0x100) ==> true
+ */
+template<typename T>
+constexpr inline bool p2aligned(T x, T align) {
+  return p2align(x, align) == x;
+}
+
 /*
  * return x % (mod) align
  * eg, p2phase(0x1234, 0x100) == 0x34 (x-0x12*align)