From 633983d4796a48949a0268c8593b26ff5f0206e2 Mon Sep 17 00:00:00 2001
From: Otmar Ertl <otmar.ertl@gmail.com>
Date: Sat, 10 Mar 2018 20:22:42 +0100
Subject: [PATCH] improved definition of HLL_Q

---
 src/hyperloglog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hyperloglog.c b/src/hyperloglog.c
index 7f5f62445..c6c7edaab 100644
--- a/src/hyperloglog.c
+++ b/src/hyperloglog.c
@@ -192,11 +192,11 @@ struct hllhdr {
 #define HLL_VALID_CACHE(hdr) (((hdr)->card[7] & (1<<7)) == 0)
 
 #define HLL_P 14 /* The greater is P, the smaller the error. */
-#define HLL_Q (63-HLL_P)
 #define HLL_REGISTERS (1<<HLL_P) /* With P=14, 16384 registers. */
 #define HLL_P_MASK (HLL_REGISTERS-1) /* Mask to index register. */
 #define HLL_BITS 6 /* Enough to count up to 63 leading zeroes. */
 #define HLL_REGISTER_MAX ((1<<HLL_BITS)-1)
+#define HLL_Q (HLL_REGISTER_MAX-HLL_P)
 #define HLL_HDR_SIZE sizeof(struct hllhdr)
 #define HLL_DENSE_SIZE (HLL_HDR_SIZE+((HLL_REGISTERS*HLL_BITS+7)/8))
 #define HLL_DENSE 0 /* Dense encoding. */