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From: "Stefan Kanthak" <stefan.kanthak@nexgo.de>
Newsgroups: gmane.linux.lib.musl.general
Subject: [PATCH] fdim(), fdimf() and fdiml() radically simplified
Date: Wed, 11 Dec 2019 10:55:01 +0100
Organization: Me, myself & IT
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Yet another optimisation/simplification in the math subtree.

JFTR: I'm NOT subscribed to your mailing list, so CC: me in replies!

--- -/src/math/fdim.c
+++ +/src/math/fdim.c
@@ -3,8 +3,4 @@
 double fdim(double x, double y)
 {
-        if (isnan(x))
-                return x;
-        if (isnan(y))
-                return y;
-        return x > y ? x - y : 0;
+        return x <= y ? 0.0 : x - y;
 }

--- -/src/math/fdimf.c
+++ +/src/math/fdimf.c
@@ -3,8 +3,4 @@
 float fdimf(float x, float y)
 {
-        if (isnan(x))
-                return x;
-        if (isnan(y))
-                return y;
-        return x > y ? x - y : 0;
+        return x <= y ? 0.0 : x - y;
 }

--- -/src/math/fdiml.c
+++ +/src/math/fdiml.c
@@ -10,8 +10,4 @@
 long double fdiml(long double x, long double y)
 {
-        if (isnan(x))
-                return x;
-        if (isnan(y))
-                return y;
-        return x > y ? x - y : 0;
+        return x <= y ? 0.0 : x - y;
 }