From d13573c930efc7330fcfd25d1df4f092cbc05ab1 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Mon, 4 Mar 2024 06:51:39 +0100
Subject: oops, the last accurate double is 2^53 and not 2^54!

---
 src/object.cpp | 2 +-
 src/timer.hpp  | 6 +++---
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/object.cpp b/src/object.cpp
index e881e5d0..00df3793 100644
--- a/src/object.cpp
+++ b/src/object.cpp
@@ -297,7 +297,7 @@ uint32_t object::allocate_frame_time(Ns dt, uint16_t& accum, uint32_t hz, float
 
     const auto from_accum = uint64_t{accum} * ns_in_sec / u16_max;
     const auto from_dt = Ns(uint64_t(double(dt.stamp) * double(speed)));
-    fm_assert(from_dt <= Ns{uint64_t{1} << 54});
+    fm_assert(from_dt <= Ns{uint64_t{1} << 53});
     const auto ticks = from_dt + from_accum;
     const auto frame_duration = ns_in_sec / hz;
     const auto frames = (uint32_t)(ticks / frame_duration);
diff --git a/src/timer.hpp b/src/timer.hpp
index faf92a3e..6e9bd651 100644
--- a/src/timer.hpp
+++ b/src/timer.hpp
@@ -34,7 +34,7 @@ struct Ns
     requires std::is_same_v<T, double>
     explicit constexpr Ns(T x) : stamp{}
     {
-        constexpr double max{uint64_t{1} << 54};
+        constexpr double max{uint64_t{1} << 53};
         fm_assert(x >= 0);
         fm_assert(x <= max);
         stamp = uint64_t(x);
@@ -50,7 +50,7 @@ struct Ns
     requires (std::is_same_v<T, double>)
     friend Ns operator*(const Ns& lhs, T b)
     {
-        constexpr double max{uint64_t{1} << 54};
+        constexpr double max{uint64_t{1} << 53};
         auto a = lhs.stamp;
         fm_assert(b >= 0);
         fm_assert(b <= max);
@@ -65,7 +65,7 @@ struct Ns
     requires (std::is_same_v<T, double>)
     static Ns from_nonzero(T seconds)
     {
-        constexpr double max{uint64_t{1} << 54};
+        constexpr double max{uint64_t{1} << 53};
         fm_assert(seconds >= 0);
         fm_assert(seconds <= max);
         return Ns((uint64_t)seconds);
-- 
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