From 6210dfb4d099651ea1731a19bd569eef0970109f Mon Sep 17 00:00:00 2001
From: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>
Date: Sun, 28 Jun 2026 14:18:01 -0400
Subject: [PATCH] [core] Use single-precision float math to avoid double
 promotion (#17252)

---
 esphome/core/helpers.cpp   | 10 +++++-----
 esphome/core/scheduler.cpp |  2 +-
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/esphome/core/helpers.cpp b/esphome/core/helpers.cpp
index 112dde7c45..a7b63643a4 100644
--- a/esphome/core/helpers.cpp
+++ b/esphome/core/helpers.cpp
@@ -669,11 +669,11 @@ void rgb_to_hsv(float red, float green, float blue, int &hue, float &saturation,
   if (delta == 0) {
     hue = 0;
   } else if (max_color_value == red) {
-    hue = int(fmod(((60 * ((green - blue) / delta)) + 360), 360));
+    hue = int(fmodf((60.0f * ((green - blue) / delta)) + 360.0f, 360.0f));
   } else if (max_color_value == green) {
-    hue = int(fmod(((60 * ((blue - red) / delta)) + 120), 360));
+    hue = int(fmodf((60.0f * ((blue - red) / delta)) + 120.0f, 360.0f));
   } else if (max_color_value == blue) {
-    hue = int(fmod(((60 * ((red - green) / delta)) + 240), 360));
+    hue = int(fmodf((60.0f * ((red - green) / delta)) + 240.0f, 360.0f));
   }
 
   if (max_color_value == 0) {
@@ -686,8 +686,8 @@ void rgb_to_hsv(float red, float green, float blue, int &hue, float &saturation,
 }
 void hsv_to_rgb(int hue, float saturation, float value, float &red, float &green, float &blue) {
   float chroma = value * saturation;
-  float hue_prime = fmod(hue / 60.0, 6);
-  float intermediate = chroma * (1 - fabs(fmod(hue_prime, 2) - 1));
+  float hue_prime = fmodf(hue / 60.0f, 6.0f);
+  float intermediate = chroma * (1.0f - fabsf(fmodf(hue_prime, 2.0f) - 1.0f));
   float delta = value - chroma;
 
   if (0 <= hue_prime && hue_prime < 1) {
diff --git a/esphome/core/scheduler.cpp b/esphome/core/scheduler.cpp
index 9c5557bdfc..8449cba5e8 100644
--- a/esphome/core/scheduler.cpp
+++ b/esphome/core/scheduler.cpp
@@ -356,7 +356,7 @@ void HOT Scheduler::set_retry_common_(Component *component, NameType name_type,
   }
 #endif
 
-  if (backoff_increase_factor < 0.0001) {
+  if (backoff_increase_factor < 0.0001f) {
     ESP_LOGE(TAG, "set_retry: backoff_factor %0.1f too small, using 1.0: %s", backoff_increase_factor,
              (name_type == NameType::STATIC_STRING && static_name) ? static_name : "");
     backoff_increase_factor = 1;