From: Øyvind Kolås <pippin@gimp.org>
Date: Wed, 26 Jan 2022 11:23:37 +0000 (+0100)
Subject: babl: make unified alpha conversion branchless
X-Git-Tag: archive/raspbian/1%0.1.106-3+rpi1^2~15^2~4^2~20
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=73df0c4d338f8dae7fe7ecb966307fd88065179b;p=babl.git

babl: make unified alpha conversion branchless
---

diff --git a/babl/base/util.h b/babl/base/util.h
index aba9c61..9f46211 100644
--- a/babl/base/util.h
+++ b/babl/base/util.h
@@ -50,23 +50,17 @@
 static inline double
 babl_epsilon_for_zero (double value)
 {
- if (value <=  BABL_ALPHA_FLOOR &&
-     value >= -BABL_ALPHA_FLOOR)
- {
-   return BABL_ALPHA_FLOOR;
- }
- return value;
+   return value * (value >  BABL_ALPHA_FLOOR || value < -BABL_ALPHA_FLOOR) +
+          BABL_ALPHA_FLOOR * (value <=  BABL_ALPHA_FLOOR &&
+                              value >= -BABL_ALPHA_FLOOR);
 }
 
 static inline float
 babl_epsilon_for_zero_float (float value)
 {
- if (value <= BABL_ALPHA_FLOOR_F &&
-     value >= -BABL_ALPHA_FLOOR_F)
- {
-   return BABL_ALPHA_FLOOR_F;
- }
- return value;
+   return value * (value >  BABL_ALPHA_FLOOR_F || value < -BABL_ALPHA_FLOOR_F) +
+          BABL_ALPHA_FLOOR * (value <=  BABL_ALPHA_FLOOR_F &&
+                              value >= -BABL_ALPHA_FLOOR_F);
 }