protected override void Compile(CodeContext c)
{
var dst = c.IntPtr("dst");
var src = c.IntPtr("src");
var cnt = c.UIntPtr("cnt");
var loop = c.Label(); // Create base labels we use
var exit = c.Label(); // in our function.
c.SetArgument(0, dst);
c.SetArgument(1, src);
c.SetArgument(2, cnt);
c.Allocate(dst); // Allocate all registers now,
c.Allocate(src); // because we want to keep them
c.Allocate(cnt); // in physical registers only.
c.Test(cnt, cnt); // Exit if length is zero.
c.Jz(exit);
c.Bind(loop); // Bind the loop label here.
var tmp = c.Int32("tmp"); // Copy a single dword (4 bytes).
c.Mov(tmp, Memory.DWord(src));
c.Mov(Memory.DWord(dst), tmp);
c.Add(src, 4); // Increment dst/src pointers.
c.Add(dst, 4);
c.Dec(cnt); // Loop until cnt isn't zero.
c.Jnz(loop);
c.Bind(exit); // Bind the exit label here.
}
protected override void Compile(CodeContext c)
{
var var = new GpVariable[32];
var a = c.IntPtr("a");
c.SetArgument(0, a);
int i;
for (i = 0; i < var.Length; i++)
{
var[i] = c.Int32("var" + i);
}
for (i = 0; i < var.Length; i++)
{
c.Xor(var[i], var[i]);
}
var v0 = c.Int32("v0");
var l = c.Label();
c.Mov(v0, 32);
c.Bind(l);
for (i = 0; i < var.Length; i++)
{
c.Add(var[i], i);
}
c.Dec(v0);
c.Jnz(l);
for (i = 0; i < var.Length; i++)
{
c.Mov(Memory.DWord(a, i * 4), var[i]);
}
}
protected override void Compile(CodeContext c)
{
var v0 = c.Int32("v0");
var v1 = c.Int32("v1");
var cnt = c.Int32("cnt");
c.Xor(v0, v0);
c.Xor(v1, v1);
c.Spill(v0);
c.Spill(v1);
var l = c.Label();
c.Mov(cnt, 32);
c.Bind(l);
c.Inc(v1);
c.Add(v0, v1);
c.Dec(cnt);
c.Jnz(l);
c.Ret(v0);
}
protected override void Compile(CodeContext c)
{
var dst = c.IntPtr("dst");
var src = c.IntPtr("src");
var i = c.IntPtr("i");
var j = c.IntPtr("j");
var t = c.IntPtr("t");
var cZero = c.Xmm("cZero");
var cMul255A = c.Xmm("cMul255A");
var cMul255M = c.Xmm("cMul255M");
var x0 = c.Xmm("x0");
var x1 = c.Xmm("x1");
var y0 = c.Xmm("y0");
var a0 = c.Xmm("a0");
var a1 = c.Xmm("a1");
var smallLoop = c.Label();
var smallEnd = c.Label();
var largeLoop = c.Label();
var largeEnd = c.Label();
var data = c.Label();
c.SetArgument(0, dst);
c.SetArgument(1, src);
c.SetArgument(2, i);
c.Allocate(dst);
c.Allocate(src);
c.Allocate(i);
// How many pixels have to be processed to make the loop aligned.
c.Lea(t, Memory.Ptr(data));
c.Xor(j, j);
c.Xorps(cZero, cZero);
c.Sub(j, dst);
c.Movaps(cMul255A, Memory.Ptr(t, 0));
c.And(j, 15);
c.Movaps(cMul255M, Memory.Ptr(t, 16));
c.Shr(j, 2);
c.Jz(smallEnd);
// j = min(i, j).
c.Cmp(j, i);
c.Cmovg(j, i);
// i -= j.
c.Sub(i, j);
// Small loop.
c.Bind(smallLoop);
c.Pcmpeqb(a0, a0);
c.Movd(y0, Memory.Ptr(src));
c.Pxor(a0, y0);
c.Movd(x0, Memory.Ptr(dst));
c.Psrlw(a0, 8);
c.Punpcklbw(x0, cZero);
c.Pshuflw(a0, a0, AsmJit.Common.Utils.Shuffle(1, 1, 1, 1));
c.Punpcklbw(y0, cZero);
c.Pmullw(x0, a0);
c.Paddsw(x0, cMul255A);
c.Pmulhuw(x0, cMul255M);
c.Paddw(x0, y0);
c.Packuswb(x0, x0);
c.Movd(Memory.Ptr(dst), x0);
c.Add(dst, 4);
c.Add(src, 4);
c.Dec(j);
c.Jnz(smallLoop);
// Second section, prepare for an aligned loop.
c.Bind(smallEnd);
c.Test(i, i);
c.Mov(j, i);
c.Jz(c.Exit);
c.And(j, 3);
c.Shr(i, 2);
c.Jz(largeEnd);
// Aligned loop.
c.Bind(largeLoop);
c.Movups(y0, Memory.Ptr(src));
c.Pcmpeqb(a0, a0);
c.Movaps(x0, Memory.Ptr(dst));
c.Xorps(a0, y0);
c.Movaps(x1, x0);
c.Psrlw(a0, 8);
c.Punpcklbw(x0, cZero);
c.Movaps(a1, a0);
c.Punpcklwd(a0, a0);
c.Punpckhbw(x1, cZero);
c.Punpckhwd(a1, a1);
c.Pshufd(a0, a0, AsmJit.Common.Utils.Shuffle(3, 3, 1, 1));
c.Pshufd(a1, a1, AsmJit.Common.Utils.Shuffle(3, 3, 1, 1));
c.Pmullw(x0, a0);
c.Pmullw(x1, a1);
c.Paddsw(x0, cMul255A);
c.Paddsw(x1, cMul255A);
c.Pmulhuw(x0, cMul255M);
c.Pmulhuw(x1, cMul255M);
c.Add(src, 16);
c.Packuswb(x0, x1);
c.Paddw(x0, y0);
c.Movaps(Memory.Ptr(dst), x0);
c.Add(dst, 16);
c.Dec(i);
c.Jnz(largeLoop);
c.Bind(largeEnd);
c.Test(j, j);
c.Jnz(smallLoop);
// Data
c.Data(data, 16,
Data.Of(0x0080008000800080, 0x0080008000800080),
Data.Of(0x0101010101010101, 0x0080008000800080));
}