protected override void Compile(CodeContext c)
{
var stack = c.Stack(256, 1).SetSize(1);
var i = c.IntPtr("i");
var a = c.Int32("a");
var b = c.Int32("b");
var l1 = c.Label();
var l2 = c.Label();
// Fill stack by sequence [0, 1, 2, 3 ... 255].
c.Xor(i, i);
c.Bind(l1);
c.Mov(stack.Clone().SetIndex(i), i.As8());
c.Inc(i);
c.Cmp(i, 255);
c.Jle(l1);
// Sum sequence in stack.
c.Xor(i, i);
c.Xor(a, a);
c.Bind(l2);
c.Movzx(b, stack.Clone().SetIndex(i));
c.Add(a, b);
c.Inc(i);
c.Cmp(i, 255);
c.Jle(l2);
c.Ret(a);
}
protected override void Compile(CodeContext c)
{
var rPtr = c.UIntPtr("rPtr");
var rSum = c.UInt32("rSum");
c.SetArgument(0, rPtr);
var rVar = new GpVariable[Cnt];
int i;
for (i = 0; i < Cnt; i++)
{
rVar[i] = c.UInt32("x" + i);
}
// Init pseudo-regs with values from our array.
for (i = 0; i < Cnt; i++)
{
c.Mov(rVar[i], Memory.DWord(rPtr, i * 4));
}
for (i = 2; i < Cnt; i++)
{
// Add and truncate to 8 bit; no purpose, just mess with jit.
c.Add(rVar[i], rVar[i - 1]);
c.Movzx(rVar[i], rVar[i].As8());
c.Movzx(rVar[i - 2], rVar[i - 1].As8());
c.Movzx(rVar[i - 1], rVar[i - 2].As8());
}
// Sum up all computed values.
c.Mov(rSum, 0);
for (i = 0; i < Cnt; i++)
{
c.Add(rSum, rVar[i]);
}
// Return the sum.
c.Ret(rSum);
}