1 files changed, 103 insertions, 0 deletions
diff --git a/chapter-interprocedural-sccp/src/test/java/com/seaofnodes/simple/Chapter14FloatTest.java b/chapter-interprocedural-sccp/src/test/java/com/seaofnodes/simple/Chapter14FloatTest.java
new file mode 100644
index 00000000..b0cf0a91
--- /dev/null
+++ b/chapter-interprocedural-sccp/src/test/java/com/seaofnodes/simple/Chapter14FloatTest.java
@@ -0,0 +1,103 @@
+package com.seaofnodes.simple;
+
+import com.seaofnodes.simple.codegen.CodeGen;
+import com.seaofnodes.simple.node.StopNode;
+import org.junit.Ignore;
+import org.junit.Test;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.fail;
+
+public class Chapter14FloatTest {
+    @Test public void testNumericAssignments() {
+        String[][] tests = {
+            {"int rounded=17.3/2.5; return rounded;", "6", "6"},
+            {"int rounded=arg/2.5; return rounded;", "6", "-6"},
+            {"int rounded=0; rounded=arg/2.5; return rounded;", "6", "-6"},
+            {"i8 rounded=arg*16.0; return rounded;", "16", "-16"},
+            {"int rounded=1e100; return rounded;", "9223372036854775807", "9223372036854775807"},
+            {"int rounded=-1e100; return rounded;", "-9223372036854775808", "-9223372036854775808"},
+            {"int rounded=1e300*1e300-1e300*1e300; return rounded;", "0", "0"},
+            {"f32 rounded=arg+16777216.0; return rounded;", "1.6777232E7", "1.6777199E7"}
+        };
+        for( String[] test : tests ) {
+            var code = new CodeGen(test[0]).driver(CodeGen.Phase.TypeCheck);
+            assertEquals(test[0],test[1],Eval2.eval(code,17));
+            assertEquals(test[0],test[2],Eval2.eval(code,-17));
+        }
+    }
+
+
+    @Test public void testSubZeroFloat() {
+        var code = new CodeGen("flt x = arg; return 0-x;").driver(CodeGen.Phase.TypeCheck);
+        // Compare strings so +0.0 and -0.0 remain distinct.
+        assertEquals("0.0", Eval2.eval(code,0));
+        assertEquals("-1.0", Eval2.eval(code,1));
+    }
+
+    @Test public void testDeadNumericReturns() {
+        for( String[] test : new String[][] {
+            {"if(1) return 7; else return 2.5;", "7"},
+            {"if(0) return 7; else return 2.5;", "2.5"},
+            {"return 7; return 2.5;", "7"},
+            {"return 2.5; return 7;", "2.5"}
+        } ) {
+            String src = test[0];
+            var code = new CodeGen(src).driver(CodeGen.Phase.TypeCheck);
+            assertEquals(src,test[1],Eval2.eval(code,0));
+        }
+    }
+
+
+    @Ignore
+    @Test
+    public void testJig() {
+        CodeGen code = new CodeGen(
+"""
+return 3.14;
+""");
+        code.driver(CodeGen.Phase.FinalizeIR);
+        assertEquals("return 3.14;", code.print());
+        assertEquals("3.14", Eval2.eval(code,  0));
+    }
+
+    @Test
+    public void testFloat() {
+        CodeGen code = new CodeGen(
+"""
+return 3.14;
+""");
+        code.driver(CodeGen.Phase.FinalizeIR);
+        assertEquals("return 3.14;", code.print());
+        assertEquals("3.14", Eval2.eval(code,  0));
+    }
+
+    @Test
+    public void testSquareRoot() {
+        CodeGen code = new CodeGen(
+"""
+flt guess = arg;
+while( 1 ) {
+    flt next = (arg/guess + guess)/2;
+    if( next == guess ) break;
+    guess = next;
+}
+return guess;
+""");
+        code.driver(CodeGen.Phase.FinalizeIR);
+        assertEquals("return Phi(Loop,(flt)arg,(((ToFloat/Phi_guess)+Phi_guess)*0.5f));", code.print());
+        assertEquals("3.0", Eval2.eval(code,  9));
+        assertEquals("1.414213562373095", Eval2.eval(code,  2));
+    }
+
+    @Test
+    public void testFPOps() {
+        CodeGen code = new CodeGen(
+"""
+flt x = arg;
+return x+1==x;
+""");
+        code.driver(CodeGen.Phase.FinalizeIR);
+        assertEquals("return ((flt)arg==(ToFloat+1.0f));", code.print());
+        assertEquals("0", Eval2.eval(code, 1));
+    }
+}