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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.print.ASMPrinter;
import org.junit.Assert;
import org.junit.Ignore;
import org.junit.Test;
import static com.seaofnodes.simple.Main.PORTS;
import static org.junit.Assert.*;
public class Chapter20Test {
@Test
public void testJig() {
CodeGen code = new CodeGen("return 0;");
code.parse().opto().typeCheck();
assertEquals("return 0;", code._stop.toString());
assertEquals("0", Eval2.eval(code, 2));
}
static void testCPU( String src, String cpu, String os, int spills, String stop ) {
CodeGen code = new CodeGen(src);
code.parse().opto().typeCheck().instSelect(PORTS,cpu,os).GCM().localSched().regAlloc().encode();
int delta = spills>>3;
if( delta==0 ) delta = 1;
assertEquals("Expect spills:",spills,code._regAlloc._spillScaled,delta);
if( stop != null )
assertEquals(stop, code._stop.toString());
}
private static void testAllCPUs( String src, int spills, String stop ) {
testCPU(src,"x86_64_v2", "SystemV",spills,stop);
testCPU(src,"riscv" , "SystemV",spills,stop);
testCPU(src,"arm" , "SystemV",spills,stop);
}
@Test public void testAlloc0() {
testAllCPUs("return new u8[arg];", 1, "return [u8];");
}
@Test public void testBasic1() {
String src = "return arg | 2;";
testCPU(src,"x86_64_v2", "SystemV",1,"return (ori,mov(arg));");
testCPU(src,"riscv" , "SystemV",0,"return ( arg | #2 );");
testCPU(src,"arm" , "SystemV",0,"return (ori,arg);");
}
@Test
public void testNewtonInteger() {
String src =
"""
// Newtons approximation to the square root
val sqrt = { int x ->
int guess = x;
while( 1 ) {
int next = (x/guess + guess)/2;
if( next == guess ) return guess;
guess = next;
}
};
return sqrt(arg) + sqrt(arg+2);
""";
testCPU(src,"x86_64_v2", "SystemV",26,null);
testCPU(src,"riscv" , "SystemV",19,null);
testCPU(src,"arm" , "SystemV",26,null);
}
@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",21,null);
testCPU(src,"arm" , "SystemV",18,null);
}
@Test
public void testAlloc2() {
String src = "int[] !xs = new int[3]; xs[arg]=1; return xs[arg&1];";
testAllCPUs(src,1,"return .[];");
}
@Test
public void testArray1() {
String src =
"""
int[] !ary = new int[arg];
// Fill [0,1,2,3,4,...]
for( int i=0; i<ary#; i++ )
ary[i] = i;
// Fill [0,1,3,6,10,...]
for( int i=0; i<ary#-1; i++ )
ary[i+1] += ary[i];
return ary[1] * 1000 + ary[3]; // 1 * 1000 + 6
""";
testCPU(src,"x86_64_v2", "SystemV",3,"return .[];");
testCPU(src,"riscv" , "SystemV",1,"return (add,.[],(mul,.[],1000));");
testCPU(src,"arm" , "SystemV",1,"return (add,.[],(muli,.[]));");
}
@Test
public void testString() {
String src = """
struct String {
u8[] cs;
int _hashCode;
};
val equals = { String self, String s ->
if( self == s ) return true;
if( self.cs# != s.cs# ) return false;
for( int i=0; i< self.cs#; i++ )
if( self.cs[i] != s.cs[i] )
return false;
return true;
};
val hashCode = { String self ->
self._hashCode
? self._hashCode
: (self._hashCode = _hashCodeString(self));
};
val _hashCodeString = { String self ->
int hash=0;
if( self.cs ) {
for( int i=0; i< self.cs#; i++ )
hash = hash*31 + self.cs[i];
}
if( !hash ) hash = 123456789;
return hash;
};
String !s = new String { cs = new u8[17]; };
s.cs[0] = 67; // C
s.cs[1] = 108; // l
hashCode(s);
""";
testCPU(src,"x86_64_v2", "SystemV",18,null);
testCPU(src,"riscv" , "SystemV", 3,null);
testCPU(src,"arm" , "SystemV", 3,null);
}
@Test
public void testCast() {
String src = "struct Bar { int x; }; var b = arg ? new Bar; return b ? b.x++ + b.x++ : -1;";
testAllCPUs(src,0,null);
}
@Test
public void testFltArg() {
String src = "return {int i, flt f, int j->return i+f+j;};";
testAllCPUs(src,0,null);
}
@Test
public void testFlags1() {
String src = """
bool b1 = arg == 1;
bool b2 = arg == 2;
if (b2) if (b1) return 1;
if (b1) return 2;
return 0;
""";
testCPU(src,"x86_64_v2", "SystemV",0,"return Phi(Region,1,2,0);");
testCPU(src,"riscv" , "SystemV",0,"return Phi(Region,1,2,0);");
testCPU(src,"arm" , "SystemV",0,"return Phi(Region,1,2,0);");
}
@Test
public void testFlags2() {
String src = """
bool b1 = arg == 1;
while (arg > 0) {
arg--;
if (b1) arg--;
}
return arg;
""";
testCPU(src,"x86_64_v2", "SystemV",3,null);
testCPU(src,"riscv" , "SystemV",2,null);
testCPU(src,"arm" , "SystemV",2,null);
}
}
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