From 5097e9f08dacb25e4c4aca20b48aa7d523067628 Mon Sep 17 00:00:00 2001
From: Cliff Click <cliffc@acm.org>
Date: Sat, 15 Mar 2025 16:05:04 -0700
Subject: Encoding fixes

---
 .../java/com/seaofnodes/simple/Chapter21Test.java    | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

(limited to 'chapter21/src/test/java/com')

diff --git a/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java b/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java
index 770c7165..e2a79b8f 100644
--- a/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java
+++ b/chapter21/src/test/java/com/seaofnodes/simple/Chapter21Test.java
@@ -42,4 +42,24 @@ public class Chapter21Test {
         testCPU(src,"arm"      , "SystemV",0,"return (or,arg,2);");
     }
 
+    @Test
+    public void testNewtonFloat() {
+        String src =
+"""
+// Newtons approximation to the square root
+val sqrt = { flt x ->
+    flt guess = x;
+    while( 1 ) {
+        flt next = (x/guess + guess)/2;
+        if( next == guess ) return guess;
+        guess = next;
+    }
+};
+flt farg = arg;
+return sqrt(farg) + sqrt(farg+2.0);
+""";
+        testCPU(src,"x86_64_v2", "SystemV",25,null);
+        testCPU(src,"riscv"    , "SystemV",17,null);
+        testCPU(src,"arm"      , "SystemV",18,null);
+    }
 }
-- 
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