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package com.seaofnodes.simple;
import com.seaofnodes.simple.codegen.CodeGen;
import com.seaofnodes.simple.node.FunNode;
import com.seaofnodes.simple.node.cpus.arm.arm;
import com.seaofnodes.simple.util.BAOS;
import java.io.IOException;
import static org.junit.Assert.assertEquals;
// Runs 32-bit ARM code in an emulator
public class TestArm64 {
public static EvalArm64 build( String main, String src, int arg, int spills, boolean print ) throws IOException {
// Compile and export Simple
CodeGen code = new CodeGen(src).driver("arm", "SystemV",true,false);
// Allocation quality not degraded
int delta = spills>>3;
if( delta == 0 ) delta =1;
if( spills != -1 && !CodeGen.iterSeedOverridden() ) assertEquals("Expect spills:", spills, code._regAlloc._spillScaled, delta);
// Image
byte[] image = new byte[1<<20]; // A megabyte (1024*1024 bytes)
EvalArm64 ARM = new EvalArm64(image, 1<<16);
int start = 0; // Code at offset 0
int cpool = fill(code._encoding._bits ,image,start);
int sdata = fill(code._encoding._cpool,image,cpool);
int end = fill(code._encoding._sdata,image,sdata);
// Initial incoming int arg
ARM.regs[arm.X0] = arg;
// malloc memory starts at 64K and goes up
// Look up starting PC or zero if not given
if( main!=null )
for( FunNode fun : code._linker )
if( fun != null && !fun.isDead() && fun._compunit == code.compunit() && main.equals(fun._name) )
ARM._pc = code._encoding.opStart(fun);
return ARM;
}
// Fill bits into image; return end point rounded up.
private static int fill( BAOS bits, byte[] image, int off) {
System.arraycopy(bits.buf(), 0, image, off, bits.size());
return (off+bits.size() + 15) & -16;
}
}
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