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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.node.StopNode;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
public class Chapter12Test {
@Test
public void testJig() {
CodeGen code = new CodeGen(
"""
return 3.14;
""");
code.parse().opto();
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.parse().opto();
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.parse().opto();
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.parse().opto();
assertEquals("return ((flt)arg==(ToFloat+1.0f));", code.print());
assertEquals("0", Eval2.eval(code, 1));
}
}
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