diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 107019254b..4bd00d2ead 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -72,7 +72,7 @@ jobs:
     - name: Install Dependencies
       run: pip install -e .
     - name: Compile EfficientNet to C
-      run: CLANG=1 GPU=1 python3 examples/compile_efficientnet.py > recognize.c
+      run: CLANG=1 python3 examples/compile_efficientnet.py > recognize.c
     - name: Compile C to native
       run: clang -O2 recognize.c -lm -o recognize
     - name: Test EfficientNet
diff --git a/accel/triton/ops_triton.py b/accel/triton/ops_triton.py
index e7fd4f036a..d778efccc2 100644
--- a/accel/triton/ops_triton.py
+++ b/accel/triton/ops_triton.py
@@ -14,7 +14,7 @@ from tinygrad.ops import UnaryOps, BinaryOps, ReduceOps, LazyOp, Op, ExplicitExe
 from tinygrad.shape import ShapeTracker
 from tinygrad.helpers import prod, DEBUG
 from tinygrad.runtime.cuda import CLBuffer
-from tinygrad.ast import ASTKernel
+from tinygrad.compiler.ast import ASTKernel
 
 stream = cuda.Stream()
 
diff --git a/examples/compile_efficientnet.py b/examples/compile_efficientnet.py
index 7817298315..a606053a78 100644
--- a/examples/compile_efficientnet.py
+++ b/examples/compile_efficientnet.py
@@ -4,31 +4,29 @@ from extra.utils import fetch
 import ast
 
 def compile_net(run, special_names):
-  # c header
-  cprog = ["#include <stdio.h>", "#include <math.h>", "#define max(x,y) ((x>y)?x:y)"]
-
   # functions that run the net
+  functions = {}
   bufs = {}
   bufnum = 0
   statements = []
   bufs_to_save = {}
   for fxn,args in run.jit_cache:
-    cprog.append(fxn.clprg.prg)
+    functions[fxn.name] = fxn.prg   # NOTE: this assumes all with the same name are the same
     cargs = []
     for i,arg in enumerate(args):
       if i in fxn.bufs_to_delete: continue
-      key = id(arg.cl)
+      key = id(arg.raw())
       if key not in bufs:
         if key in special_names:
-          bufs[key] = (special_names[key], len(arg.cl)//4)
+          bufs[key] = (special_names[key], len(arg.raw()._buf))
         else:
-          bufs[key] = (f"buf_{bufnum}", len(arg.cl)//4)
+          bufs[key] = (f"buf_{bufnum}", len(arg.raw()._buf))
           bufnum += 1
-          if i > 0: bufs_to_save[bufs[key][0]] = arg.cl  # if first usage of a buffer is not an output, and it's not a special name
+          if i > 0: bufs_to_save[bufs[key][0]] = arg.raw()  # if first usage of a buffer is not an output, and it's not a special name
       cargs.append(bufs[key][0])
-    statements.append(f"{fxn.clprg.name}({', '.join(cargs)});")
+    statements.append(f"{fxn.name}({', '.join(cargs)});")
 
-  return cprog, statements, bufs, bufs_to_save
+  return functions, statements, bufs, bufs_to_save
 
 if __name__ == "__main__":
   model = EfficientNet(0)
@@ -44,21 +42,17 @@ if __name__ == "__main__":
   the_output = run(the_input)
 
   # TODO: fetch this from the jit in self.input_replace and self.ret (hint: use get_parameters on self.ret)
-  special_names = {id(the_input.lazydata.realized.cl): "input", id(the_output.lazydata.realized.cl): "outputs"}
+  special_names = {id(the_input.lazydata.realized.raw()): "input", id(the_output.lazydata.realized.raw()): "outputs"}
 
-  cprog, statements, bufs, bufs_to_save = compile_net(run, special_names)
+  functions, statements, bufs, bufs_to_save = compile_net(run, special_names)
 
-  # buffers (empty)
-  cprog += [f"float {x[0]}[{x[1]}];" for x in bufs.values() if x[0] not in bufs_to_save] 
+  # c header
+  cprog = ["#include <stdio.h>", "#include <math.h>", "#define max(x,y) ((x>y)?x:y)"]
 
-  # buffers (weights)
+  # save the weights
   for name,cl in bufs_to_save.items():
-    weight = ''.join(["\\x%02X"%x for x in bytes(memoryview(cl)[0:len(cl)//4])])
+    weight = ''.join(["\\x%02X"%x for x in bytes(cl._buf)])
     cprog.append(f"unsigned char {name}_data[] = \"{weight}\";")
-    cprog.append(f"float *{name} = (float *){name}_data;")
-
-  # the net
-  cprog += ["void net() {"] + statements + ["}"]
 
   # image library!
   cprog += ["#define STB_IMAGE_IMPLEMENTATION", fetch("https://raw.githubusercontent.com/nothings/stb/master/stb_image.h").decode('utf-8')]
@@ -69,6 +63,15 @@ if __name__ == "__main__":
   lbls = ['"'+lbls[i]+'"' for i in range(1000)]
   cprog.append(f"char *lbls[] = {{{','.join(lbls)}}};")
 
+  # buffers (empty + weights)
+  cprog += [f"float {name}[{len}];" if name not in bufs_to_save else f"float *{name} = (float *){name}_data;" for name,len in bufs.values()] 
+
+  # the functions
+  cprog += list(functions.values())
+
+  # the net
+  cprog += ["void net() {"] + statements + ["}"]
+
   cprog += ["""
 int main(int argc, char* argv[]) {
   int DEBUG = getenv("DEBUG") != NULL ? atoi(getenv("DEBUG")) : 0;
@@ -101,5 +104,5 @@ int main(int argc, char* argv[]) {
   else printf("%s\\n", lbls[best_idx]);
 }"""]
 
-  # CLANG=1 GPU=1 python3 examples/compile_efficientnet.py | clang -O2 -lm -x c - -o recognize && time ./recognize docs/stable_diffusion_by_tinygrad.jpg
+  # CLANG=1 python3 examples/compile_efficientnet.py | clang -O2 -lm -x c - -o recognize && DEBUG=1 time ./recognize docs/stable_diffusion_by_tinygrad.jpg
   print('\n'.join(cprog))
diff --git a/extra/gemm/amx.py b/extra/gemm/amx.py
index 6a2cde1f34..5901a8a633 100755
--- a/extra/gemm/amx.py
+++ b/extra/gemm/amx.py
@@ -4,7 +4,7 @@ import time
 import sys
 np.set_printoptions(linewidth=160)
 np.set_printoptions(linewidth=1000, threshold=10000000000, suppress=False)
-from tinygrad.llops.ops_llvm import LLVM, LLVMBuffer, int_const
+from tinygrad.runtime.ops_llvm import LLVM, LLVMBuffer, int_const
 from llvmlite import ir  # type: ignore
 
 
diff --git a/extra/gemm/metal_matmul.py b/extra/gemm/metal_matmul.py
index 7d2839ad89..64eca2c17c 100644
--- a/extra/gemm/metal_matmul.py
+++ b/extra/gemm/metal_matmul.py
@@ -1,5 +1,5 @@
 import numpy as np
-from tinygrad.runtime.metal import CLBuffer, CLProgram
+from tinygrad.runtime.ops_metal import CLBuffer, CLProgram
 
 def benchmark(prog):
   e = prog()
diff --git a/extra/introspection.py b/extra/introspection.py
index 9b3ec6645c..47cbe6893b 100644
--- a/extra/introspection.py
+++ b/extra/introspection.py
@@ -3,7 +3,7 @@ import gc
 from tinygrad.helpers import prod
 from tinygrad.tensor import Tensor
 from tinygrad.lazy import LazyBuffer
-from tinygrad.llops.ops_gpu import GPUBuffer
+from tinygrad.runtime.ops_gpu import GPUBuffer
 from tinygrad.ops import GlobalCounters
 
 def print_objects():
diff --git a/extra/kernel_search.py b/extra/kernel_search.py
index a9e4d1ebfb..ceb27f2dfd 100644
--- a/extra/kernel_search.py
+++ b/extra/kernel_search.py
@@ -6,7 +6,7 @@ from enum import Enum
 import numpy as np
 from tinygrad.ops import LazyOp, ReduceOps, BinaryOps, UnaryOps, MovementOps
 from tinygrad.shape import ShapeTracker, View, ZeroView
-from tinygrad.llops.ops_gpu import GPUBuffer, CLASTKernel
+from tinygrad.runtime.ops_gpu import GPUBuffer, CLASTKernel
 from tinygrad.runtime.opencl import OSX_TIMING_RATIO
 from tinygrad.helpers import getenv, DEBUG
 from extra.lib_test_ast import test_ast
diff --git a/extra/lib_test_ast.py b/extra/lib_test_ast.py
index e41244d773..30eacedd7c 100644
--- a/extra/lib_test_ast.py
+++ b/extra/lib_test_ast.py
@@ -1,8 +1,8 @@
 import sys
 import numpy as np
 from typing import Dict, Type
-from tinygrad.ast import ASTKernel
-from tinygrad.llops.ops_cpu import CPUBuffer
+from tinygrad.compiler.ast import ASTKernel
+from tinygrad.runtime.ops_cpu import CPUBuffer
 from tinygrad.ops import DeviceBuffer, map_buffers
 
 in_test = False
diff --git a/extra/thneed.py b/extra/thneed.py
index f514087eb4..c9c428c8d3 100644
--- a/extra/thneed.py
+++ b/extra/thneed.py
@@ -4,12 +4,11 @@ import struct
 import json
 import traceback
 import numpy as np
-from tinygrad.runtime.opencl import CL
-from tinygrad.llops.ops_gpu import CLProgram, CLImage, CLBuffer
+from tinygrad.runtime.ops_gpu import CLProgram, CLImage, CLBuffer
 from tinygrad.helpers import prod, getenv
 from collections import defaultdict
 import pyopencl as cl
-from tinygrad.runtime.opencl import OSX_TIMING_RATIO
+from tinygrad.runtime.ops_gpu import CL, OSX_TIMING_RATIO
 
 DEBUGCL = getenv("DEBUGCL", 0)
 FLOAT16 = getenv("FLOAT16", 0)
@@ -75,29 +74,29 @@ class Thneed:
         if o['arg_type'] == "image2d_t":
           if 'buffer_id' in o and o['height'] == 1 and not bufs_loaded[o['buffer_id']]:
             # hack: use a image1d since we can back that with a buffer
-            buf = cl.Image(CL().cl_ctx, mf.READ_WRITE, tfmt, shape=(o['width'],), buffer=bufs[o['buffer_id']])
+            buf = cl.Image(CL.cl_ctx, mf.READ_WRITE, tfmt, shape=(o['width'],), buffer=bufs[o['buffer_id']])
           else:
             # buffer isn't supported in image2d, copy buffer into image
             if 'buffer_id' in o and bufs_loaded[o['buffer_id']]:
               arr = np.zeros(bufs[o['buffer_id']].size // 2, dtype=np.float16)
               cl.enqueue_copy(q, arr, bufs[o['buffer_id']])
-              buf = cl.Image(CL().cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, tfmt,
+              buf = cl.Image(CL.cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, tfmt,
                 shape=(o['width'], o['height']), pitches=(o['row_pitch'],), hostbuf=arr)
             elif o['needs_load']:
-              buf = cl.Image(CL().cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, tfmt,
+              buf = cl.Image(CL.cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, tfmt,
                 shape=(o['width'], o['height']), pitches=(o['row_pitch'],), hostbuf=o['data'])
             else:
-              buf = cl.Image(CL().cl_ctx, mf.READ_WRITE, tfmt, shape=(o['width'], o['height']))
+              buf = cl.Image(CL.cl_ctx, mf.READ_WRITE, tfmt, shape=(o['width'], o['height']))
         if o['arg_type'] == "image1d_t":
           assert not o['needs_load']
           assert not bufs_loaded[o['buffer_id']]
-          buf = cl.Image(CL().cl_ctx, mf.READ_WRITE, tfmt, shape=(o['width'],), buffer=bufs[o['buffer_id']])
+          buf = cl.Image(CL.cl_ctx, mf.READ_WRITE, tfmt, shape=(o['width'],), buffer=bufs[o['buffer_id']])
       else:
         if 'data' in o:
-          buf = cl.Buffer(CL().cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=o['data'])
+          buf = cl.Buffer(CL.cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=o['data'])
         else:
           # zero out buffers
-          buf = cl.Buffer(CL().cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=b'\x00'*o['size'])
+          buf = cl.Buffer(CL.cl_ctx, mf.READ_WRITE | mf.COPY_HOST_PTR, hostbuf=b'\x00'*o['size'])
         
       bufs[o['id']] = buf
       bufs_loaded[o['id']] = 'data' in o
@@ -119,7 +118,7 @@ class Thneed:
     # load binaries
     for o in jdat['binaries']:
       nptr = ptr + o['length']
-      prgs[o['name']] = CLProgram(o['name'], weights[ptr:nptr], rename=False, binary=True)
+      prgs[o['name']] = CLProgram(o['name'], weights[ptr:nptr], binary=True)
       ptr = nptr
   
     # populate the cl_cache
@@ -194,17 +193,17 @@ class Thneed:
               })
               if needs_load:
                 data = np.empty(a.size//4, dtype=np.float32)
-                cl.enqueue_copy(CL().cl_queue, data, a, is_blocking=True)
+                cl.enqueue_copy(CL.cl_queue, data, a, is_blocking=True)
                 weights.append(data.tobytes())
             elif isinstance(a, cl.Image):
               needs_load = a in self.buffers_to_save
               row_pitch = (a.shape[0]*4*(2 if FLOAT16 else 4) + 63)//64 * 64
               size = row_pitch * a.shape[1]
               # this is *2 if float16 and *4 if float32
-              buf = cl.Buffer(CL().cl_ctx, cl.mem_flags.READ_WRITE, size=size * (2 if FLOAT16 else 1))
+              buf = cl.Buffer(CL.cl_ctx, cl.mem_flags.READ_WRITE, size=size * (2 if FLOAT16 else 1))
 
               # zero out the buffer
-              cl.enqueue_copy(CL().cl_queue, buf, b'\x00'*buf.size, is_blocking=True)
+              cl.enqueue_copy(CL.cl_queue, buf, b'\x00'*buf.size, is_blocking=True)
 
               CLProgram("from_image_strided", """
                 __kernel void from_image_strided(read_only image2d_t in, __global float4 *out, int row_pitch) {
@@ -224,7 +223,7 @@ class Thneed:
 
               if needs_load:
                 data = np.empty(size//(2 if FLOAT16 else 4), dtype=np.float32)
-                cl.enqueue_copy(CL().cl_queue, data, buf, is_blocking=True)
+                cl.enqueue_copy(CL.cl_queue, data, buf, is_blocking=True)
                 if FLOAT16: data = data.astype(np.float16)
                 weights.append(data.tobytes())
             else:
@@ -271,9 +270,9 @@ class Thneed:
     events = []
     st = time.monotonic()
     for prg, args in self.cl_cache:
-      events.append(prg.clprg(CL().cl_queue, *args))
+      events.append(prg.clprg(CL.cl_queue, *args))
     mt = time.monotonic()
-    CL().cl_queue.finish()
+    CL.cl_queue.finish()
     et = time.monotonic() - st
     print(f"submit in {(mt-st)*1000.0:.2f} ms, total runtime is {et*1000.0:.2f} ms")
 
@@ -284,7 +283,7 @@ class Thneed:
       total_runtime = 0
       for i, ((prg, args), e) in enumerate(zip(self.cl_cache, events)):
         runtime = (e.profile.end - e.profile.start) * OSX_TIMING_RATIO
-        print(f"{i:3d} time {total_runtime/1e6:5.2f} ms running {prg.name:20s} with {str(args[0]):15s} {str(args[1]):15s} count {len(args)-2:2d} runtime {runtime/1e3:7.2f} us {(prg.op_estimate)/runtime:9.2f} GFLOPS {prg.options} -> {args[2].shape if hasattr(args[2], 'shape') else args[2].size}")
+        print(f"{i:3d} time {total_runtime/1e6:5.2f} ms running {prg.name:20s} with {str(args[0]):15s} {str(args[1]):15s} count {len(args)-2:2d} runtime {runtime/1e3:7.2f} us {(getattr(prg, 'op_estimate', float('nan')))/runtime:9.2f} GFLOPS -> {args[2].shape if hasattr(args[2], 'shape') else args[2].size}")
         if (DEBUGCL >= 2 and getenv("PRINT_KERNEL", -1) == i) or DEBUGCL >= 3:
           print(prg.prg)
         total_runtime += runtime
@@ -321,11 +320,11 @@ class Thneed:
         # 3 runs just in case
         for i in range(3):
           try:
-            e = prg.clprg(CL().cl_queue, *args)
+            e = prg.clprg(CL.cl_queue, *args)
           except (cl.LogicError, cl.RuntimeError):
             # INVALID_WORK_GROUP_SIZE
             continue
-          CL().cl_queue.finish()
+          CL.cl_queue.finish()
           runtime = e.profile.end - e.profile.start
           #print(runtime, args[0], args[1])
           runtimes.append((runtime, local_args))
diff --git a/openpilot/compile.py b/openpilot/compile.py
index 5161dc9b1c..af9b074bce 100644
--- a/openpilot/compile.py
+++ b/openpilot/compile.py
@@ -19,7 +19,8 @@ import numpy as np
 import tinygrad.graph as graph
 from tinygrad.ops import GlobalCounters
 
-from tinygrad.runtime.opencl import CL
+import pyopencl as cl
+from tinygrad.runtime.ops_gpu import CL
 from extra.utils import fetch
 from extra.onnx import get_run_onnx
 from tinygrad.tensor import Tensor
@@ -64,13 +65,16 @@ def compile(dat, output_fn):
   cl_cache = []
   for prg,args in model_exec.jit_cache:
     real_clprg = prg.clprg
+    setattr(real_clprg, "op_estimate", prg.op_estimate)
     used_ops += real_clprg.op_estimate
     # replace clprg with a fake program to log to cl_cache
-    prg.clprg = lambda *args: cl_cache.append((real_clprg, args))
+    prg.clprg = lambda *args, wait=False: cl_cache.append((real_clprg, list(args[0:2])+[x._cl for x in args[2:]]))
     prg(*args)
+    # put it back
+    prg.clprg = real_clprg
 
   from extra.thneed import Thneed
-  t = Thneed(cl_cache, {k:inputs[k].lazydata.realized.cl for k in inputs.keys()})
+  t = Thneed(cl_cache, {k:inputs[k].lazydata.realized.raw()._cl for k in inputs.keys()})
 
   if getenv("OPTWG", 0):
     t.optimize_local_workgroup()
@@ -84,7 +88,7 @@ def compile(dat, output_fn):
 
   # confirm thneed found the right output
   thneed_out = np.empty((t.outputs[0].size//4,), dtype=np.float32).reshape(tinygrad_out.shape)
-  CL.enqueue_copy(thneed_out, t.outputs[0], is_blocking=True)
+  cl.enqueue_copy(CL.cl_queue, thneed_out, t.outputs[0], is_blocking=True)
   np.testing.assert_allclose(thneed_out, tinygrad_out.numpy())
 
   # testing is float32 only (fix this)
@@ -102,11 +106,11 @@ def compile(dat, output_fn):
 
       # try old thneed with a different input
       for k,v in t.inputs.items():
-        CL.enqueue_copy(v, new_np_inputs[k], is_blocking=True)
+        cl.enqueue_copy(CL.cl_queue, v, new_np_inputs[k], is_blocking=True)
 
       t.run()
       old_thneed_out = np.empty((t.outputs[0].size//4,), dtype=np.float32).reshape(tinygrad_out.shape)
-      CL.enqueue_copy(old_thneed_out, t.outputs[0], is_blocking=True)
+      cl.enqueue_copy(CL.cl_queue, old_thneed_out, t.outputs[0], is_blocking=True)
 
       # compare thneed (rerun) with torch
       np.testing.assert_allclose(new_torch_out, old_thneed_out, atol=1e-4, rtol=1e-2)
@@ -119,11 +123,11 @@ def compile(dat, output_fn):
 
       # inputs
       for k,v in nt.inputs.items():
-        CL.enqueue_copy(v, new_np_inputs[k], is_blocking=True)
+        cl.enqueue_copy(CL.cl_queue, v, new_np_inputs[k], is_blocking=True)
 
       nt.run()
       new_thneed_out = np.empty((nt.outputs[0].size//4,), dtype=np.float32).reshape(tinygrad_out.shape)
-      CL.enqueue_copy(new_thneed_out, nt.outputs[0], is_blocking=True)
+      cl.enqueue_copy(CL.cl_queue, new_thneed_out, nt.outputs[0], is_blocking=True)
 
       # compare torch to thneed
       np.testing.assert_allclose(new_torch_out, new_thneed_out, atol=1e-4, rtol=1e-2)
diff --git a/setup.py b/setup.py
index ce72d88ba0..12f01950b6 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ setup(name='tinygrad',
       license='MIT',
       long_description=long_description,
       long_description_content_type='text/markdown',
-      packages = ['tinygrad', 'tinygrad.llops', 'tinygrad.nn', 'tinygrad.runtime', 'tinygrad.shape'],
+      packages = ['tinygrad', 'tinygrad.codegen', 'tinygrad.nn', 'tinygrad.runtime', 'tinygrad.shape'],
       classifiers=[
         "Programming Language :: Python :: 3",
         "License :: OSI Approved :: MIT License"
diff --git a/sz.sh b/sz.sh
index 0911cb8486..c1e4ba4831 100755
--- a/sz.sh
+++ b/sz.sh
@@ -1,2 +1,3 @@
 #!/bin/bash
-scc tinygrad --by-file
+# switched to cloc due to https://github.com/boyter/scc/issues/379
+cloc --by-file tinygrad/*
diff --git a/test/external_test_gpu_ast.py b/test/external_test_gpu_ast.py
index a14fabc975..54dab89213 100644
--- a/test/external_test_gpu_ast.py
+++ b/test/external_test_gpu_ast.py
@@ -3,7 +3,7 @@ import unittest
 import numpy as np
 from tinygrad.ops import LazyOp, ReduceOps, BinaryOps, UnaryOps, MovementOps
 from tinygrad.shape import ShapeTracker, View, ZeroView
-from tinygrad.llops.ops_gpu import GPUBuffer, CLASTKernel
+from tinygrad.runtime.ops_gpu import GPUBuffer, CLASTKernel
 from tinygrad.helpers import getenv
 from extra.lib_test_ast import test_ast
 
diff --git a/test/external_test_image.py b/test/external_test_image.py
index 1f4156713d..0a9e2b0c73 100644
--- a/test/external_test_image.py
+++ b/test/external_test_image.py
@@ -7,7 +7,7 @@ if 'IMAGE' not in os.environ:
 os.environ['GPU'] = '1'
 os.environ['OPT'] = '2'
 from tinygrad.tensor import Tensor
-from tinygrad.llops.ops_gpu import CLImage
+from tinygrad.runtime.ops_gpu import CLImage
 from tinygrad.nn import Conv2d
 Tensor.no_grad = True
 
diff --git a/test/test_conv_shapetracker.py b/test/test_conv_shapetracker.py
index cedb6fd631..3083f3d374 100644
--- a/test/test_conv_shapetracker.py
+++ b/test/test_conv_shapetracker.py
@@ -14,8 +14,8 @@ class TestConvShapetracker(unittest.TestCase):
     conv(inp).realize()
     test = GlobalCounters.cache
     GlobalCounters.cache = None
-    assert len(test) == 1, f"conv should only have one kernel {[x[0].clprg.name for x in test]}"
-    print(test[0][0].clprg.prg)
+    assert len(test) == 1, f"conv should only have one kernel {[x[0].name for x in test]}"
+    print(test[0][0].prg)
     for arg in test[0][1]:
       print(arg.st)
       assert len(arg.st.views) == 1
diff --git a/test/test_graph.py b/test/test_graph.py
index ca1b1a2cfb..650f219166 100644
--- a/test/test_graph.py
+++ b/test/test_graph.py
@@ -3,7 +3,7 @@ import unittest
 import networkx as nx  # type: ignore
 import numpy as np
 from tinygrad.graph import G, log_op, prune_graph
-from tinygrad.llops.ops_cpu import CPUBuffer
+from tinygrad.runtime.ops_cpu import CPUBuffer
 from tinygrad.ops import BinaryOps, LazyOp, MovementOps, ReduceOps
 
 class TestGraph(unittest.TestCase):
diff --git a/test/test_speed_v_torch.py b/test/test_speed_v_torch.py
index 62d6f9fc6d..cc65bcc4da 100644
--- a/test/test_speed_v_torch.py
+++ b/test/test_speed_v_torch.py
@@ -12,15 +12,6 @@ from tinygrad.tensor import Tensor
 from tinygrad.nn import Conv2d
 from tinygrad.helpers import colored, getenv, DEBUG
 from tinygrad.jit import TinyJit
-METAL = getenv("METAL")
-try:
-  from tinygrad.runtime.opencl import CL
-  if METAL:
-    from tinygrad.runtime.metal import sync
-  else:
-    def sync(): CL().cl_queue.finish()
-except ImportError:
-  def sync(): pass
 
 IN_CHANS = [int(x) for x in getenv("IN_CHANS", "4,16,64").split(",")]
 
@@ -43,22 +34,17 @@ def helper_test_speed(f1, *args):
   ret = None
   for _ in range(CNT):
     del ret
-    GlobalCounters.global_ops = 0
-    GlobalCounters.global_mem = 0
     args = [(x+1).realize() if isinstance(x,Tensor) else (None if x is None else (x+1)) for x in args]  # cache defeats
 
-    # sync all before!
-    sync()
-    torch.zeros(1, device=torch_device).cpu()
+    # force syncing
+    [x.cpu().numpy() for x in args if x is not None]
 
+    GlobalCounters.global_ops = 0
+    GlobalCounters.global_mem = 0
     if DEBUG >= 4: print("benchmark start")
     st = time.monotonic()
     ret = f1(*args)
-    if isinstance(ret, Tensor) and ret.device in ["GPU"]:
-      sync()
-    if not isinstance(ret, Tensor) and torch_device != "cpu":
-      # TODO: better way to sync?
-      torch.zeros(1, device=torch_device).cpu()
+    ret.cpu().numpy() # not ideal, it's copying. why is this so slow in tinygrad?
     et = (time.monotonic() - st) * 1000
     ets.append(et)
     if DEBUG >= 4: print("benchmark stop")
diff --git a/tinygrad/ast.py b/tinygrad/codegen/ast.py
similarity index 84%
rename from tinygrad/ast.py
rename to tinygrad/codegen/ast.py
index 286885d21c..73255c5f62 100644
--- a/tinygrad/ast.py
+++ b/tinygrad/codegen/ast.py
@@ -1,10 +1,26 @@
 from enum import Enum, auto
 import itertools
-from typing import List, Tuple, Optional
-from tinygrad.helpers import prod, dedup, all_same
-from tinygrad.ops import LazyOp, MovementOps, get_lazyop_info, get_buffers, ReduceOps, get_lazyops
+from typing import List, Tuple, Optional, Set
+from tinygrad.helpers import prod, dedup, all_same, DEBUG
+from tinygrad.ops import LazyOp, MovementOps, get_lazyop_info, get_buffers, ReduceOps, get_lazyops, GlobalCounters
 from tinygrad.shape import ShapeTracker, View, strides_for_shape
 
+class ASTRunner:
+  def __init__(self, name, prg, bufs_to_delete:Set[int]=set(), global_work_size:Optional[List[int]]=None, local_work_size:Optional[List[int]]=None, op_estimate=0, mem_estimate=0):
+    if DEBUG >= 4: print(prg)
+    self.name, self.prg, self.global_work_size, self.local_work_size, self.bufs_to_delete, self.op_estimate, self.mem_estimate = name, prg, global_work_size, local_work_size, bufs_to_delete, op_estimate, mem_estimate
+  def build(self, runtime):
+    self.clprg = runtime(self.name, self.prg)
+    return self
+  def __call__(self, *bufs):
+    et = self.clprg(self.global_work_size, self.local_work_size, *[x.raw() for i,x in enumerate(bufs) if i not in self.bufs_to_delete], wait=DEBUG>=2)
+    if et is not None: GlobalCounters.time_sum_s += et
+    if DEBUG >= 1:
+      print(f"**** {GlobalCounters.kernel_count:4d} {self.name:20s} args {len(bufs)-len(self.bufs_to_delete):5d}  kernels {str(self.global_work_size):18s} {str(self.local_work_size):12s} OPs {self.op_estimate/1e6:7.1f}M/{GlobalCounters.global_ops/1e9:7.2f}G  mem {GlobalCounters.mem_used/1e9:5.2f} GB " +
+            (str() if DEBUG <= 1 else f"tm {et*1e6:9.2f}us/{GlobalCounters.time_sum_s*1e3:9.2f}ms ({self.op_estimate/(et*1e9):8.2f} GFLOPS)"))
+    GlobalCounters.log_kernel(self.op_estimate, self.mem_estimate)
+    return et
+
 def get_first_reduce(shapes):
   for i in range(len(shapes[0])):
     if not all_same([x[i] for x in shapes]):
diff --git a/tinygrad/llops/ops_gpu.py b/tinygrad/codegen/gpu.py
similarity index 64%
rename from tinygrad/llops/ops_gpu.py
rename to tinygrad/codegen/gpu.py
index c62257a1b8..e2119827de 100644
--- a/tinygrad/llops/ops_gpu.py
+++ b/tinygrad/codegen/gpu.py
@@ -1,42 +1,35 @@
-from __future__ import annotations
-import numpy as np
 import math
-from typing import List, Tuple, Optional, Dict, Union, Set, Final, Callable
-from tinygrad.helpers import prod, DEBUG, IMAGE
-from tinygrad.ops import UnaryOps, BinaryOps, ReduceOps, MovementOps, LazyOp, Op, ExplicitExecAST, GlobalCounters
-from tinygrad.ast import ASTKernel, Token, Types
-from tinygrad.shape import ShapeTracker
+from collections import defaultdict
+from typing import Optional, List, Tuple, Dict, Set, Final, NamedTuple
+from tinygrad.ops import UnaryOps, BinaryOps, ReduceOps, LazyOp, Op
+from tinygrad.codegen.ast import ASTKernel, ASTRunner, Token, Types
 from tinygrad.shape.symbolic import Node, ModNode, DivNode, render_python
+from tinygrad.shape import ShapeTracker
+from tinygrad.helpers import getenv, DEBUG, prod
+
 # div is different in cl than python
 render_cl = render_python.copy()
 render_cl[DivNode] = lambda self,ops,ctx: f"({self.a.render(ops)}/{self.b})"
-from tinygrad.helpers import getenv
-
-# TODO: select runtimes in a smarter way
-CUDA,METAL,CLANG = getenv("CUDA", 0), getenv("METAL", 0), getenv("CLANG", 0)
-if not CUDA and not METAL and not CLANG:
-  from tinygrad.runtime.opencl import CLBuffer, CLImage, CLProgram # NOTE: using CL will not work for the CUDA runtime # noqa: F401
-else:
-  class CLImage:  # type: ignore
-    def __init__(self, shape): raise NotImplementedError("current runtime doesn't support images")
-  if CUDA: from tinygrad.runtime.cuda import CLBuffer, CLProgram  # type: ignore
-  elif METAL: from tinygrad.runtime.metal import CLBuffer, CLProgram  # type: ignore
-  elif CLANG: from tinygrad.runtime.clang import CLBuffer, CLProgram  # type: ignore
 
 VALIDHACKS = getenv("VALIDHACKS", 0)    # TODO: remove the need for this
 NATIVE_EXPLOG = getenv("NATIVE_EXPLOG", 0)  # this is needed as a switch for the tests to pass
 
-KOPT = getenv("KOPT", -1)
-PRINT_AST = getenv("PRINT_AST", "0")
-TEST_AST = getenv("TEST_AST", 0)
+class GPULanguage(NamedTuple):
+  kernel_prefix : str = ""
+  buffer_prefix : str = ""
+  smem_prefix : str = ""
+  barrier : str = ""
+  gid : List[str] = []
+  lid : List[str] = []
+  extra_args : List[str] = []
+  float4 : Optional[str] = None
 
-class GPURunner:
-  def __init__(self, clprg:CLProgram, bufs_to_delete:Set[int], global_work_size:List[int], local_work_size:Optional[List[int]]):
-    self.clprg, self.global_work_size, self.local_work_size, self.bufs_to_delete = clprg, global_work_size, local_work_size, bufs_to_delete
-  def __call__(self, *bufs):
-    return self.clprg(self.global_work_size, self.local_work_size, *[x.cl for i,x in enumerate(bufs) if i not in self.bufs_to_delete])
+class GPUCodegen(ASTKernel):
+  lang : GPULanguage = GPULanguage()
+
+  # for renaming
+  kernel_cnt : Final[Dict[str, int]] = defaultdict(lambda: -1)
 
-class CLASTKernel(ASTKernel):
   code_for_op : Final[Dict[Op, str]] = {
     UnaryOps.NOOP: "(A)", UnaryOps.NEG: "(-(A))", UnaryOps.NOT: "((float)1.0-A)",
     UnaryOps.EXP: "native_exp(A)" if NATIVE_EXPLOG else "exp(A)",
@@ -58,7 +51,7 @@ class CLASTKernel(ASTKernel):
     assert len(self.bufs[buf_index].st.views) == 1, "store has more than one view"
 
     # all stores can merge, since they have one view and are valid
-    should_upcast = not CLANG and self.buftokens[buf_index].can_float4()
+    should_upcast = self.lang.float4 and self.buftokens[buf_index].can_float4()
 
     to_store = {o:v for o,v in zip(self.buftokens[buf_index].offsets(), value)}
     did_store = set()
@@ -68,14 +61,14 @@ class CLASTKernel(ASTKernel):
       assert valid.min == 1, "store must always be valid"
       if should_upcast:
         for j in range(4): did_store.add(o+j)
-        v = Token(f"{CLProgram.float4}({','.join([to_store[o+j].tok for j in range(4)])})", Types.FLOAT4) 
+        v = Token(f"{self.lang.float4}({','.join([to_store[o+j].tok for j in range(4)])})", Types.FLOAT4) 
       idxy, valid = self.sts[buf_index].expr_idxs(o)
       assert valid.min == 1, "store must always be valid"
-      if isinstance(self.bufs[buf_index]._buf, CLImage):
+      if hasattr(self.bufs[buf_index]._buf, "IMAGE"):
         assert v.typ == Types.FLOAT4, "Image requires upcasting to FLOAT4"
         self.kernel.append(f"write_imagef(data{buf_index}, {self.image_idx(buf_index, idxy)}, {v.tok});  /* {self.bufs[buf_index]._base_shape} */\n")
       elif v.typ == Types.FLOAT4:
-        self.kernel.append(f"(({CLProgram.buffer_prefix}float4*)data{buf_index})[{(idxy//4).render(render_cl)}] = {v.tok};\n")
+        self.kernel.append(f"(({self.lang.buffer_prefix}float4*)data{buf_index})[{(idxy//4).render(render_cl)}] = {v.tok};\n")
       else:
         self.kernel.append(f"data{buf_index}[{(idxy//(4 if v.typ == Types.FLOAT4 else 1)).render(render_cl)}] = {v.tok};\n")
 
@@ -87,7 +80,7 @@ class CLASTKernel(ASTKernel):
       val = self.bufs[buf_index]._backing[0]
       assert not math.isnan(val)
       const = Token(f"({val}f)", Types.FLOAT)
-    should_upcast = not CLANG and const is None and self.buftokens[buf_index].can_float4()
+    should_upcast = self.lang.float4 and const is None and self.buftokens[buf_index].can_float4()
     tokens = []
     for o in self.buftokens[buf_index].offsets():
       key = f"val{buf_index}_{o}" if o >= 0 else f"val{buf_index}_m{-o}"
@@ -102,14 +95,14 @@ class CLASTKernel(ASTKernel):
             #print((idxy+j).render(), idxy_test.render(), valid.render(), valid_test.render(), can_merge)
         if const is not None:
           ldr = const
-        elif isinstance(self.bufs[buf_index]._buf, CLImage):
+        elif hasattr(self.bufs[buf_index]._buf, "IMAGE"):
           assert should_upcast and can_merge, f"Image requires upcasting to FLOAT4 {self.buftokens[buf_index]}"
           ldr = Token(f"read_imagef({self.buftokens[buf_index].tok}, smp, {self.image_idx(buf_index, idxy, VALIDHACKS)}) /* {self.bufs[buf_index]._base_shape} */", Types.FLOAT4)
         elif should_upcast and can_merge:
-          ldr = Token(f"(({CLProgram.buffer_prefix}float4*){self.buftokens[buf_index].tok})[{(idxy//4).render(render_cl)}]", Types.FLOAT4)
+          ldr = Token(f"(({self.lang.buffer_prefix}float4*){self.buftokens[buf_index].tok})[{(idxy//4).render(render_cl)}]", Types.FLOAT4)
         else:
           ldr = Token(f"{self.buftokens[buf_index].tok}[{idxy.render(render_cl)}]", Types.FLOAT)
-        ldr = ldr if valid.min == 1 or (VALIDHACKS and isinstance(self.bufs[buf_index]._buf, CLImage)) else (Token(f"({valid.render(render_cl)} ? {ldr.tok} : 0.0f)", ldr.typ) if valid.max == 1 else Token("0.0f", ldr.typ))
+        ldr = ldr if valid.min == 1 or (VALIDHACKS and hasattr(self.bufs[buf_index]._buf, "IMAGE")) else (Token(f"({valid.render(render_cl)} ? {ldr.tok} : 0.0f)", ldr.typ) if valid.max == 1 else Token("0.0f", ldr.typ))
         if const is not None:
           self.loaded_keys[(buf_index,o)] = ldr
         else:
@@ -122,11 +115,11 @@ class CLASTKernel(ASTKernel):
       tokens.append(self.loaded_keys[(buf_index,o)])
     return tokens
 
-  def ast_parse(self, x:Union[GPUBuffer, LazyOp], acc:List[Token], do_reduce=False) -> List[Token]:
+  def ast_parse(self, x, acc:List[Token], do_reduce=False) -> List[Token]:
     if not isinstance(x, LazyOp): return self.load(self.bufs.index(x))
     if isinstance(x.op, ReduceOps) and not do_reduce: return acc
     values : List[List[Token]] = ([acc] if isinstance(x.op, ReduceOps) else []) + [self.ast_parse(v, acc, do_reduce) for v in x.src]
-    code = CLASTKernel.code_for_op[x.op]  # TODO: replace this with a function
+    code = GPUCodegen.code_for_op[x.op]  # TODO: replace this with a function
     if len(values) == 2:
       assert len(values[0]) == len(values[1]) and values[0][0].typ == values[1][0].typ, f"values mismatch {values}"
       return [Token(code.replace("A", a.tok).replace("B", b.tok), a.typ) for a,b in zip(values[0], values[1])]
@@ -136,10 +129,10 @@ class CLASTKernel(ASTKernel):
   def hand_coded_optimizations(self):
     # if there's images in the earlybufs, we have to make an axis the 4 loading one
     # shove the axis to the end and remove 
-    if any(isinstance(buf._buf, CLImage) for buf in self.earlybufs):
+    if any(hasattr(buf._buf, "IMAGE") for buf in self.earlybufs):
       eb_valids = [True] * self.shape_len
       for i in range(len(self.bufs)):
-        if isinstance(self.bufs[i]._buf, CLImage) and self.bufs[i] in self.earlybufs:
+        if hasattr(self.bufs[i]._buf, "IMAGE") and self.bufs[i] in self.earlybufs:
           valids = [self.sts[i].shape[j]%4 == 0 and self.sts[i].views[-1].strides[j] == 1 for j in range(self.shape_len)]
           eb_valids = [x and y for x,y in zip(eb_valids, valids)]
       assert any(eb_valids), f"invalid op with images {eb_valids}"
@@ -158,18 +151,18 @@ class CLASTKernel(ASTKernel):
     self.simplify_ones()
 
     # are we grouping?
-    if not CLANG and not self.buftokens[0].can_float4() and self.first_reduce <= 2 and self.first_reduce + 1 <= self.shape_len and prod(self.sts[0].shape[:self.first_reduce]) <= 2048:
+    if self.lang.float4 and not self.buftokens[0].can_float4() and self.first_reduce <= 2 and self.first_reduce + 1 <= self.shape_len and prod(self.sts[0].shape[:self.first_reduce]) <= 2048:
       # TODO: use 1024 if it's allowed in a smarter way
-      for sz in ((([1024] if METAL else []) + [256, 16]) if prod(self.sts[0].shape[:self.first_reduce]) <= 32 else [16]):
+      for sz in (([256, 16]) if prod(self.sts[0].shape[:self.first_reduce]) <= 32 else [16]):
         if all([st.shape[self.first_reduce] % sz == 0 or st.shape[self.first_reduce] == 1 for st in self.sts]):
           self.group_for_reduce.append(sz)
           break
 
     # if there's images in the latebufs, we have to make an axis the 4 storing one. this affects the kernel shape
-    if any(isinstance(buf._buf, CLImage) for buf in self.bufs if buf not in self.earlybufs) and not self.buftokens[0].can_float4():
+    if any(hasattr(buf._buf, "IMAGE") for buf in self.bufs if buf not in self.earlybufs) and not self.buftokens[0].can_float4():
       lb_valids = [True] * self.shape_len
       for i in range(len(self.bufs)):
-        valids = [self.sts[i].shape[j]%4 == 0 and (self.sts[i].views[-1].strides[j] == 1 or not isinstance(self.bufs[i]._buf, CLImage) or self.bufs[i] in self.earlybufs) for j in range(self.shape_len)]
+        valids = [self.sts[i].shape[j]%4 == 0 and (self.sts[i].views[-1].strides[j] == 1 or not hasattr(self.bufs[i]._buf, "IMAGE") or self.bufs[i] in self.earlybufs) for j in range(self.shape_len)]
         lb_valids = [x and y for x,y in zip(lb_valids, valids)]
       assert any(lb_valids), f"invalid op with images {lb_valids}"
       lb_valid = lb_valids.index(True)
@@ -192,7 +185,7 @@ class CLASTKernel(ASTKernel):
     self.simplify_ones()
 
     # split to 4 float4s
-    if self.buftokens[0].can_float4() and any(isinstance(buf._buf, CLImage) for buf in self.earlybufs) and prod(self.sts[0].shape[:self.first_reduce]) >= 2048 and not self.group_for_reduce:
+    if self.buftokens[0].can_float4() and any(hasattr(buf._buf, "IMAGE") for buf in self.earlybufs) and prod(self.sts[0].shape[:self.first_reduce]) >= 2048 and not self.group_for_reduce:
       xb_choices = []
       for i in range(self.first_reduce):
         if all(st.shape[i]%4 == 0 for st in self.sts):
@@ -214,7 +207,7 @@ class CLASTKernel(ASTKernel):
         self.simplify_ones()
 
     # use more opencl indexing
-    if self.first_reduce == 2 and isinstance(self.bufs[0]._buf, CLImage):
+    if self.first_reduce == 2 and hasattr(self.bufs[0]._buf, "IMAGE"):
       base_shape = self.bufs[0]._base_shape
       if all([(base_shape[0]*base_shape[1])%st.shape[0] == 0 and st.shape[0]//base_shape[0] != 0 for st in self.sts]):
         if DEBUG >= 3: print("split opencl", base_shape, self.sts[0].shape)
@@ -237,11 +230,11 @@ class CLASTKernel(ASTKernel):
 
   # STOP WASTING TIME WITH DOING THE RESHAPES AND PERMUTES BY HAND. KERNEL SEARCH IS THE ONLY WAY IT WILL EVER BE GOOD
   # group_for_reduce will have to be better first
-  def codegen(self) -> Callable:
+  def codegen(self) -> ASTRunner:
     self.process()
     self.upcast_in_mid_reduce = False
     if DEBUG >= 3: self.printbufs("old:", DEBUG>=4)
-    if KOPT == -1 or IMAGE == 2: self.hand_coded_optimizations()
+    self.hand_coded_optimizations()
 
     # add a local buffer for multistage reduce
     if len(self.group_for_reduce):
@@ -257,18 +250,17 @@ class CLASTKernel(ASTKernel):
     self.loaded_keys : Dict[Tuple[int,int], Token] = {}
 
     self.prekernel : Set[str] = set()
-    self.kernel : List[str] = ["const sampler_t smp = CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP | CLK_FILTER_NEAREST;\n"] if any(isinstance(buf._buf, CLImage) for buf in self.bufs) else []
+    self.kernel : List[str] = ["const sampler_t smp = CLK_NORMALIZED_COORDS_FALSE | CLK_ADDRESS_CLAMP | CLK_FILTER_NEAREST;\n"] if any(hasattr(buf._buf, "IMAGE") for buf in self.bufs) else []
 
     # output_shape[-1] is get_global_id(0)
-    if CLANG:
+    if len(self.lang.gid) == 0:
       self.kernel += [f"for (int idx{i} = 0; idx{i} < {self.output_shape[i]}; idx{i}++) {{\n" for i in range(0, len(self.output_shape))]
     else:
-      MAX_OUTPUT_SHAPE = 3
-      self.kernel += [f"int idx{len(self.output_shape)-1-i} = {CLProgram.gid[i]}; /* {self.output_shape[-1-i]} */\n" for i in range(min(MAX_OUTPUT_SHAPE, len(self.output_shape))) if self.output_shape[-1-i] != 1]
-      if len(self.output_shape) > MAX_OUTPUT_SHAPE:
+      self.kernel += [f"int idx{len(self.output_shape)-1-i} = {self.lang.gid[i]}; /* {self.output_shape[-1-i]} */\n" for i in range(min(len(self.lang.gid), len(self.output_shape))) if self.output_shape[-1-i] != 1]
+      if len(self.output_shape) > len(self.lang.gid):
         # sometimes, there's more dimensions. compact all the dimensions into the first one
         # TODO: these compactions should be searchable
-        final_dimension = len(self.output_shape)-MAX_OUTPUT_SHAPE
+        final_dimension = len(self.output_shape)-len(self.lang.gid)
         for i in range(final_dimension-1, -1, -1):
           self.kernel += [f"int idx{i} = idx{final_dimension} % {self.output_shape[i]};", f"idx{final_dimension} = idx{final_dimension} / {self.output_shape[i]};\n"]
         self.output_shape = [prod(self.output_shape[0:final_dimension+1])] + list(self.output_shape[final_dimension+1:])
@@ -282,7 +274,7 @@ class CLASTKernel(ASTKernel):
 
       acc_offsets = self.buftokens[self.bufs.index(self.earlybufs[0])].acc_offsets()
       assert self.reduceopop is not None
-      self.kernel += [f"{accumulator.decltype()} {accumulator.tok} = {CLASTKernel.start_for_op[self.reduceopop]};\n" for accumulator in accumulators]
+      self.kernel += [f"{accumulator.decltype()} {accumulator.tok} = {GPUCodegen.start_for_op[self.reduceopop]};\n" for accumulator in accumulators]
       self.kernel += [f"for (int idx{i} = 0; idx{i} < {full_shape[i]}; idx{i}++) {{\n" for i in range(self.first_reduce+len(self.group_for_reduce), self.shape_len)]
       self.kernel += [f"{x.tok};\n" for x in self.ast_parse(self.reduceop, [accumulators[off] for off in acc_offsets], do_reduce=True)] + ["}\n"] * (self.shape_len - (self.first_reduce + len(self.group_for_reduce)))
     
@@ -292,9 +284,9 @@ class CLASTKernel(ASTKernel):
       assert lvalid.min == 1, "local buffer must always be valid"
       self.kernel.append(f"int mid_idx = {lidx.render(render_cl)};\n")
       for i,acc in enumerate(accumulators):
-        self.kernel.append(CLProgram.smem_prefix + f"{acc.decltype()} {self.buftokens[-1].tok}{i}[{prod(self.group_for_reduce)}];")
+        self.kernel.append(self.lang.smem_prefix + f"{acc.decltype()} {self.buftokens[-1].tok}{i}[{prod(self.group_for_reduce)}];")
         self.kernel.append(f"{self.buftokens[-1].tok}{i}[mid_idx] = {acc.tok};\n")
-      self.kernel.append(CLProgram.barrier+"\n")
+      self.kernel.append(self.lang.barrier+"\n")
 
       if self.upcast_in_mid_reduce:
         assert len(self.group_for_reduce) == 2
@@ -311,86 +303,31 @@ class CLASTKernel(ASTKernel):
         if self.upcast_in_mid_reduce:
           self.kernel.append(f'float4 ld = vload4(0, &temp{i}[mid*4]);\n')
           for j in range(4):
-            self.kernel.append(CLASTKernel.code_for_op[self.reduceopop].replace('A', new_accumulators[i*4+j].tok).replace('B', f'ld.{"xyzw"[j]}')+";\n")
+            self.kernel.append(GPUCodegen.code_for_op[self.reduceopop].replace('A', new_accumulators[i*4+j].tok).replace('B', f'ld.{"xyzw"[j]}')+";\n")
         else:
-          self.kernel.append(CLASTKernel.code_for_op[self.reduceopop].replace('A', new_accumulators[i].tok).replace('B', f'temp{i}[mid]')+";\n")
+          self.kernel.append(GPUCodegen.code_for_op[self.reduceopop].replace('A', new_accumulators[i].tok).replace('B', f'temp{i}[mid]')+";\n")
       self.kernel.append("}\n")
       accumulators = new_accumulators
     
     # late ast
     self.store(0, self.ast_parse(self.ast, accumulators))
     if self.group_for_reduce: self.kernel.append("}")
-    if CLANG: self.kernel += ["}"] * len(self.output_shape)
+    if len(self.lang.gid) == 0: self.kernel += ["}"] * len(self.output_shape)
     self.kernel.append("\n}")
 
     # kernel function definition
     function_name = ("re_S" if self.reduceop else "ew_S") + '_'.join([str(x) for x in self.bufs[0].shape if x != 1])
-    buftypes = [f"{'read_only' if i > 0 else 'write_only'} image2d_t" if isinstance(x._buf, CLImage) else (CLProgram.buffer_prefix+self.buftokens[i].decltype() + ("restrict" if CLANG else "")) for i,x in enumerate(self.bufs)]
-    self.kernel = list(self.prekernel) + [f"{CLProgram.kernel_prefix} void {function_name}(",] + \
-      [', '.join([f'{t} data{i}' for i,t in enumerate(buftypes) if i not in self.bufs_to_delete] + CLProgram.extra_args)] + \
+    GPUCodegen.kernel_cnt[function_name] += 1
+    if GPUCodegen.kernel_cnt[function_name]:
+      function_name = f"{function_name}{'_N'+str(GPUCodegen.kernel_cnt[function_name])}"
+
+    buftypes = [f"{'read_only' if i > 0 else 'write_only'} image2d_t" if hasattr(x._buf, "IMAGE") else self.lang.buffer_prefix+self.buftokens[i].decltype() for i,x in enumerate(self.bufs)]
+    self.kernel = list(self.prekernel) + [f"{self.lang.kernel_prefix} void {function_name}(",] + \
+      [', '.join([f'{t} data{i}' for i,t in enumerate(buftypes) if i not in self.bufs_to_delete] + self.lang.extra_args)] + \
       [") {\n"] + self.kernel
 
-    # compile kernel
-    self.fxn = CLProgram(function_name, ' '.join(self.kernel), op_estimate=self.info.flops, mem_estimate=sum(prod(x._base_shape) for x in self.bufs))
     if DEBUG >= 3 and len(self.bufs_to_delete): print(f"deleting buffers {self.bufs_to_delete}")
-    return GPURunner(self.fxn, self.bufs_to_delete, self.output_shape[::-1] if len(self.output_shape) > 0 else [1], (self.group_for_reduce[::-1] + [1]*(len(self.output_shape)-len(self.group_for_reduce))) if self.group_for_reduce else None)
-
-  def print(self):
-    super().print()
-    for i in range(len(self.bufs)):
-      print(self.buftokens[i], self.bufs[i] in self.earlybufs, self.sts[i])
-    print(self.fxn.prg)
-
-class GPUBuffer(ExplicitExecAST):
-  def __init__(self, shape:Union[ShapeTracker, Tuple[int, ...]], hostbuf:Optional[GPUBuffer]=None, backing:Optional[np.ndarray]=None, force_create=False):
-    super().__init__(shape, hostbuf)
-    self._buf : Optional[Union[CLImage, CLBuffer]] = hostbuf._buf if hostbuf is not None else None
-    self._backing : Optional[np.ndarray] = hostbuf._backing if hostbuf is not None else backing
-    # early copy in for large buffers
-    if (self._backing is not None and self._backing.shape != (1,)) or force_create:
-      self.cl
-  
-  # TODO: refactor this to return self._buf and not import pyopencl
-  @property
-  def cl(self) -> Union[CLBuffer, CLImage]:
-    if self._buf is None:
-      self._buf = CLImage(self._base_shape) if (len(self._base_shape) == 3 and self._base_shape[2] == 4 and IMAGE >= 2) else CLBuffer(4*prod(self._base_shape))
-    assert self._buf is not None
-    if self._backing is not None:
-      assert GlobalCounters.cache is None, f"can't copy in {self._backing.shape} while caching"
-      self._buf.copyin(self._backing)
-      self._backing = None
-    return self._buf._cl
-
-  # TODO: we don't always need a hostbuf
-  def __repr__(self): return f"GPUBuffer(shape={self.st}, hostbuf=GPUBuffer(shape={self._base_shape}" + (f", backing=np.array({self._backing}, dtype=np.float32)))" if self._backing else ", force_create=True))")
-
-  @staticmethod
-  def fromCPU(x): return GPUBuffer(x.shape, backing=x.view(np.ndarray).astype(np.float32).ravel())
-
-  def toCPU(self) -> np.ndarray:
-    cl_buf = self.contiguous()
-    cl_buf.cl   # force buffer creation, happens if it's a backed buffer that hasn't been created yet
-    cl_buf = cl_buf if isinstance(cl_buf._buf, CLBuffer) else type(self).exec_ast(LazyOp(op=UnaryOps.NOOP, src=(self.movement_op(MovementOps.RESHAPE, tuple(list(self.shape)+[1])), )))
-    assert prod(cl_buf._base_shape) == prod(self.shape), f"shape product mismatch {cl_buf._base_shape} vs {self.shape}"
-    data = np.empty(self.shape, dtype=np.float32)
-    assert GlobalCounters.cache is None, f"can't copy out {self} while caching"
-    cl_buf._buf.copyout(data)
-    return data
-
-  @classmethod
-  def exec_ast(cls, ast:LazyOp, output_buffer:Optional[GPUBuffer]=None):
-    k = CLASTKernel(ast, output_buffer)
-    if KOPT > 0:
-      from extra.kernel_search import apply_optimization
-      apply_optimization(k, ast, max_interventions=KOPT)
-    prg = k.codegen()
-    if GlobalCounters.cache is not None: GlobalCounters.cache.append((prg, k.bufs))
-    prg(*k.bufs)
-    if PRINT_AST == "1" or (hasattr(k, "fxn") and PRINT_AST == k.fxn.name):
-      print(k.fxn.name)
-      k.print()
-    if TEST_AST:
-      from extra.lib_test_ast import test_ast  # type: ignore
-      test_ast(k)
-    return k.ret
+    return ASTRunner(function_name, ' '.join(self.kernel), self.bufs_to_delete,
+      self.output_shape[::-1] if len(self.output_shape) > 0 else [1],
+      (self.group_for_reduce[::-1] + [1]*(len(self.output_shape)-len(self.group_for_reduce))) if self.group_for_reduce else None,
+      op_estimate=self.info.flops, mem_estimate=sum(prod(x._base_shape) for x in self.bufs))
diff --git a/tinygrad/llops/ops_llvm.py b/tinygrad/codegen/llvm.py
similarity index 77%
rename from tinygrad/llops/ops_llvm.py
rename to tinygrad/codegen/llvm.py
index 13f69b8cf7..fc51c9a228 100644
--- a/tinygrad/llops/ops_llvm.py
+++ b/tinygrad/codegen/llvm.py
@@ -1,19 +1,12 @@
-from __future__ import annotations
-import math
-import functools
-from typing import Tuple, Union, Dict, Any, List, ClassVar, Optional
-from tinygrad.helpers import prod, DEBUG
-from tinygrad.shape import ShapeTracker
-from tinygrad.ops import LazyOp
-from tinygrad.ast import ASTKernel
-import ctypes
-import numpy as np
-from tinygrad.ops import UnaryOps, BinaryOps, ReduceOps, ExplicitExecAST
-from tinygrad.runtime.llvm import LLVM, ir
+import functools, math
+from typing import ClassVar, List
+from llvmlite import ir  # type: ignore
+from tinygrad.codegen.ast import ASTKernel, ASTRunner
+from tinygrad.ops import UnaryOps, BinaryOps, ReduceOps, LazyOp
+from tinygrad.helpers import DEBUG, prod
+
 from tinygrad.shape.symbolic import Variable, NumNode, MulNode, DivNode, ModNode, GeNode, LtNode, SumNode, AndNode
-
 def int_const(x): return ir.Constant(ir.IntType(64), x)
-
 render_llvm = {
   Variable: lambda self,ops,ctx: self.expr,
   NumNode: lambda self,ops,ctx: int_const(self.b),
@@ -26,7 +19,7 @@ render_llvm = {
   AndNode: lambda self,ops,ctx: functools.reduce(lambda a,b: ctx.and_(a,b.render(ops,ctx)), self.nodes[1:], self.nodes[0].render(ops,ctx))
 }
 
-class LLVMBuffer(ExplicitExecAST):
+class LLVMCodegen(ASTKernel):
   op_lookup : ClassVar = {
     UnaryOps.NOOP: lambda builder,x: x,
     UnaryOps.NEG: lambda builder,x: builder.fneg(x, flags=('fast',)),
@@ -46,41 +39,10 @@ class LLVMBuffer(ExplicitExecAST):
     ReduceOps.MAX: ir.Constant(ir.FloatType(), -math.inf)
   }
 
-  def __init__(self, shape:Union[ShapeTracker, Tuple[int, ...]], hostbuf=None, force_create=False):
-    super().__init__(shape, hostbuf)
-    # TODO: force alignment?
-    self._buf = (ctypes.c_float * (prod(self.shape)))() if hostbuf is None else hostbuf._buf
-    #assert ctypes.addressof(self._buf) & 0x1F == 0
+  def codegen(self):
+    self.process()
+    if DEBUG >= 3: self.printbufs("old:", DEBUG>=4)
 
-  def __repr__(self): return f"LLVMBuffer {str(self.st)}"
-
-  @staticmethod
-  def fromCPU(x):
-    x = x.astype(np.float32)
-    ret = LLVMBuffer(x.shape)
-    ctypes.memmove(ret._buf, x.ctypes.data, prod(ret.shape)*4)
-    return ret
-  
-  def toCPU(x): return np.ctypeslib.as_array(x.contiguous()._buf)[:prod(x.shape)].reshape(x.shape).copy()
-
-  func_cache : Dict[str, Any] = {}
-  @classmethod
-  def exec_ast(cls, ast:LazyOp, output_buffer:Optional[LLVMBuffer]=None) -> LLVMBuffer:
-    k = ASTKernel(ast, output_buffer)
-
-    # cached kernel
-    if k.key in LLVMBuffer.func_cache:
-      LLVMBuffer.func_cache[k.key](*[x._buf for x in k.bufs])
-      return k.ret
-
-    # process if uncached
-    k.process()
-
-    if DEBUG >= 2:
-      print(k.ast)
-      print("old:", [x.shape for x in k.sts])
-      print("old:", [x.views[-1].strides for x in k.sts])
-    
     # this stuff can't be hand coded
     kernel_output_axis : List[int] = []
     """
@@ -119,12 +81,12 @@ class LLVMBuffer(ExplicitExecAST):
     """
 
     # the 4x4 need to go all the way at the end, even after reduce
-    output_shape = k.sts[0].shape
-    full_shape_options = [x.shape for x in k.sts if x.shape != output_shape]
+    output_shape = self.sts[0].shape
+    full_shape_options = [x.shape for x in self.sts if x.shape != output_shape]
     full_shape = output_shape if len(full_shape_options) == 0 else full_shape_options[0]
 
     full_shape = full_shape if not kernel_output_axis else full_shape[:-len(kernel_output_axis)]
-    kernel_output_dim = prod([k.sts[0].shape[a] for a in kernel_output_axis])
+    kernel_output_dim = prod([self.sts[0].shape[a] for a in kernel_output_axis])
     kernel_output_type = ir.FloatType() if kernel_output_dim == 1 else ir.VectorType(ir.FloatType(), kernel_output_dim)
 
     def get_idxs(builder, idx, buf_index):
@@ -143,7 +105,7 @@ class LLVMBuffer(ExplicitExecAST):
 
     # create llvm function
     module = ir.Module(name=__file__)
-    func = ir.Function(module, ir.FunctionType(ir.VoidType(), [ir.FloatType().as_pointer()]*(len(k.bufs))), name='exec')
+    func = ir.Function(module, ir.FunctionType(ir.VoidType(), [ir.FloatType().as_pointer()]*(len(self.bufs))), name='exec')
 
     # force llvmlite to allow us to add function attribute then add the attribute
     func.attributes._known = func.attributes._known.union(frozenset(['"no-nans-fp-math"="true"']))
@@ -158,13 +120,13 @@ class LLVMBuffer(ExplicitExecAST):
     loop_exit = loop_exit[::-1]
 
     # add the buffer indexing
-    idx_level = [[int_const(st.offset)] for st in k.sts]
+    idx_level = [[int_const(st.offset)] for st in self.sts]
     for i in range(len(full_shape)):
-      for j in range(len(k.bufs)):
+      for j in range(len(self.bufs)):
         # stride
         si = loop_entry[i+1].phi(ir.IntType(64), name=f"idx_{j}_{i}")
         si.add_incoming(idx_level[j][-1], loop_entry[i]._block)
-        si_ps = loop_exit[i+1].add(si, int_const(k.sts[j].views[-1].strides[i]))
+        si_ps = loop_exit[i+1].add(si, int_const(self.sts[j].views[-1].strides[i]))
         si.add_incoming(si_ps, loop_exit[i+1]._block)
         idx_level[j].append(si)
 
@@ -172,7 +134,7 @@ class LLVMBuffer(ExplicitExecAST):
     def ast_parse(builder, x, level, reduce_result=None):
       if not isinstance(x, LazyOp):
         m = kernel_output_type(ir.Undefined)
-        buf_index = k.bufs.index(x)
+        buf_index = self.bufs.index(x)
         for i, idx in enumerate(get_idxs(builder, idx_level[buf_index][level], buf_index)):
           # first view is already implictly handled
           idx, valid = x.st._expr_idx(Variable(idx, 0, prod(x.st.shape)))
@@ -195,12 +157,12 @@ class LLVMBuffer(ExplicitExecAST):
 
       m = kernel_output_type(ir.Undefined)
       if kernel_output_dim == 1:
-        return LLVMBuffer.op_lookup[x.op](builder, *values)
+        return LLVMCodegen.op_lookup[x.op](builder, *values)
       else:
         # TODO: this only has to be done for certain ops
         for i in range(kernel_output_dim):
           value = [builder.extract_element(v, int_const(i)) for v in values]
-          element = LLVMBuffer.op_lookup[x.op](builder, *value)
+          element = LLVMCodegen.op_lookup[x.op](builder, *value)
           m = builder.insert_element(m, element, int_const(i))
         return m
 
@@ -209,9 +171,9 @@ class LLVMBuffer(ExplicitExecAST):
 
     # do the early ast
     reduce_result = None
-    if k.reduceop:
-      reduce_input = ast_parse(loop_exit[-1], k.reduceop.src[0], -1)
-      phis = [LLVMBuffer.start_for_op[k.reduceop.op]]  # type: ignore
+    if self.reduceop:
+      reduce_input = ast_parse(loop_exit[-1], self.reduceop.src[0], -1)
+      phis = [LLVMCodegen.start_for_op[self.reduceop.op]]  # type: ignore
       if kernel_output_dim > 1:
         phis = [kernel_output_type(phis * kernel_output_dim)]
       for i in range(store_loop+1, len(loop_entry)):
@@ -219,16 +181,16 @@ class LLVMBuffer(ExplicitExecAST):
         val.add_incoming(phis[-1], loop_entry[i-1]._block)
         phis.append(val)
 
-      if k.reduceop.op == ReduceOps.SUM:
+      if self.reduceop.op == ReduceOps.SUM:
         reduce_result = loop_exit[-1].fadd(reduce_input, val, flags=('fast',))
-      elif k.reduceop.op == ReduceOps.MAX:
+      elif self.reduceop.op == ReduceOps.MAX:
         reduce_result = loop_exit[-1].select(loop_exit[-1].fcmp_unordered(">", val, reduce_input, flags=('fast',)), val, reduce_input, flags=('fast',))
 
       for i,phi in enumerate(phis[1:]):
         phi.add_incoming(reduce_result, loop_exit[store_loop+1+i]._block)
 
     # do the late ast
-    result = ast_parse(loop_exit[store_loop], k.ast, store_loop, reduce_result=reduce_result)
+    result = ast_parse(loop_exit[store_loop], self.ast, store_loop, reduce_result=reduce_result)
 
     # store result
     builder = loop_exit[store_loop]
@@ -247,5 +209,5 @@ class LLVMBuffer(ExplicitExecAST):
 
     loop_entry[-1].branch(loop_exit[-1]._block)
     loop_exit[0].ret_void()
-    LLVMBuffer.func_cache[k.key] = LLVM().exec(module, k.bufs, k.info.flops, sum(len(x._buf) for x in k.bufs))
-    return k.ret
+
+    return ASTRunner('exec', str(module), op_estimate=self.info.flops, mem_estimate=sum(prod(x._base_shape) for x in self.bufs))
diff --git a/tinygrad/jit.py b/tinygrad/jit.py
index 37eedf9d4f..f8581aa755 100644
--- a/tinygrad/jit.py
+++ b/tinygrad/jit.py
@@ -13,7 +13,7 @@ class TinyJit:
     self.input_replace : Dict[DeviceBuffer, Any]= {}
 
   def __call__(self, *args, **kwargs) -> Any:
-    if Device.DEFAULT != "GPU": return self.fxn(*args, **kwargs)  # only jit on the GPU
+    if Device.DEFAULT not in ["GPU", "CLANG"]: return self.fxn(*args, **kwargs)  # only jit on the GPU
     # NOTE: this cast is needed since although we know realize will create a ".realized" DeviceBuffer, the type checker doesn't
     input_tensors = {k:cast(DeviceBuffer, v.realize().lazydata.realized)._buf for k,v in itertools.chain(enumerate(args), kwargs.items()) if isinstance(v, Tensor)}
     assert len(input_tensors) != 0, "no inputs to JIT"
diff --git a/tinygrad/lazy.py b/tinygrad/lazy.py
index c4659610e7..13a6219485 100644
--- a/tinygrad/lazy.py
+++ b/tinygrad/lazy.py
@@ -1,6 +1,6 @@
 from __future__ import annotations
 from typing import Optional, Tuple, Union, List, Dict, Any, ClassVar, Type
-import sys, weakref, importlib, inspect
+import os, sys, weakref, importlib, inspect
 from weakref import WeakValueDictionary
 from tinygrad.helpers import prod, DEBUG
 from tinygrad.shape import ShapeTracker
@@ -14,21 +14,20 @@ sys.setrecursionlimit(10000)
 OPT = getenv("OPT", 2)
 LAZY = getenv("LAZY", 1)
 
-def get_buffer(name, base='tinygrad.llops'):
+def get_buffer(name, base='tinygrad.runtime'):
   try:
-    return (name.upper(), [cls for cname, cls in inspect.getmembers(importlib.import_module(f'{base}.ops_{name}'), inspect.isclass) if (cname.lower() == name + "buffer")][0])
+    return [cls for cname, cls in inspect.getmembers(importlib.import_module(f'{base}.ops_{name}'), inspect.isclass) if (cname.lower() == name + "buffer")][0]
   except Exception as e:  # NOTE: this can't be put on one line due to mypy issue
     print(name, "backend not available", e, file=sys.stderr)
 
 class _Device:
   def __init__(self) -> None:
-    self._buffers : Dict[str, Type[DeviceBuffer]] = {x[0]:x[1] for x in [
-      get_buffer('cpu'), get_buffer('gpu'), get_buffer('llvm'), get_buffer('torch'),
-      get_buffer('triton', 'accel.triton')] if x is not None}
+    self._buffers : Dict[str, Type[DeviceBuffer]] = {x.upper():get_buffer(x) for x in 
+      [os.path.splitext(x)[0][len("ops_"):] for x in sorted(os.listdir(os.path.join(os.path.dirname(os.path.realpath(__file__)), "runtime"))) if x.startswith("ops_")] if x is not None}
     self.DEFAULT : str = "CPU"
     for name in self._buffers:
       if getenv(name) == 1: self.DEFAULT = name  # note: DEFAULT can be a Device that can't be imported. better than silent use of a different device
-      self.__setattr__(name, name)
+      if self._buffers[name] is not None: self.__setattr__(name, name)
 Device = _Device()
 
 # TODO: movement ops that only change shape are really nops. treat them as such
diff --git a/tinygrad/ops.py b/tinygrad/ops.py
index 98ac10a0ad..50c8befb5b 100644
--- a/tinygrad/ops.py
+++ b/tinygrad/ops.py
@@ -1,7 +1,7 @@
 from __future__ import annotations
 import numpy as np
 from enum import Enum, auto
-from typing import Union, Type, NamedTuple, Tuple, Any, List, ClassVar, Optional, Callable, Dict
+from typing import Union, Type, NamedTuple, Tuple, Any, List, ClassVar, Optional, Callable, Dict, TypeVar
 import functools, operator
 from tinygrad.helpers import prod, DEBUG
 from tinygrad.shape import ShapeTracker
@@ -32,13 +32,35 @@ def map_buffers(real_srcs, x:LazyOp) -> LazyOp:
   if x in real_srcs: return map_buffers(real_srcs, real_srcs[x]) if isinstance(real_srcs[x], LazyOp) else real_srcs[x]
   return LazyOp(x.op, tuple((map_buffers(real_srcs, y) if isinstance(y, LazyOp) else real_srcs[y]) for y in x.src), x.arg)
 
+_T = TypeVar("_T")
+class RawBuffer:
+  def __init__(self, size): raise NotImplementedError("must be implemented")
+  @classmethod
+  def fromCPU(cls:Type[_T], x:np.ndarray) -> _T: raise NotImplementedError("must be implemented")
+  def toCPU(self:RawBuffer) -> np.ndarray: raise NotImplementedError("must be implemented")
+
+class RawBufferCopyIn(RawBuffer):
+  def copyin(self, x:np.ndarray) -> None: raise NotImplementedError("must be implemented")
+
+  @classmethod
+  def fromCPU(cls, x:np.ndarray):
+    ret = cls(4*prod(x.shape))
+    ret.copyin(x)
+    return ret
+
+class RawBufferCopyInOut(RawBufferCopyIn):
+  size : int
+  def copyout(self, x:np.ndarray) -> None: raise NotImplementedError("must be implemented")
+
+  def toCPU(self) -> np.ndarray:
+    x = np.empty((self.size//4), dtype=np.float32)
+    self.copyout(x)
+    return x
+
 # a placeholder class to extend by the exec classes
-class DeviceBuffer:
+class DeviceBuffer(RawBuffer):
   _buf: Any                # underlying buffer
   shape: Tuple[int, ...]
-  @staticmethod
-  def fromCPU(x:np.ndarray) -> DeviceBuffer: raise NotImplementedError("must be implemented")
-  def toCPU(self:DeviceBuffer) -> np.ndarray: raise NotImplementedError("must be implemented")
   @classmethod
   def exec_ast(cls, ast:LazyOp, output_buffer=None): raise NotImplementedError("must be implemented")
 
@@ -53,14 +75,14 @@ shape_fxn_for_op : Dict[Op, Callable] = {
   **{op:functools.partial(lambda mop,self,arg: GenericShape(ShapeTracker(self.shape).movement_op(mop, arg).shape, self.flops), op) for op in MovementOps}}
 
 # used in CPUBuffer and TorchBuffer
-class GenericExecAST(DeviceBuffer):  # pylint: disable=abstract-method
+class InterpretedBuffer(DeviceBuffer):  # pylint: disable=abstract-method
   fxn_for_op : ClassVar = shape_fxn_for_op
   # TODO: use generic types here to remove __init__ in specialized classes
-  def __init__(self, lbuf:Any): self.buf, self.shape = lbuf, tuple(lbuf.shape)
+  def __init__(self, lbuf:Any): self._buf, self.shape = lbuf, tuple(lbuf.shape)
   def contiguous(self): return type(self).exec_ast(LazyOp(op=UnaryOps.NOOP, src=(self,)))
-  def movement_op(self, op:MovementOps, arg=None): return type(self)(self.fxn_for_op[op](self.buf, arg)) if op in self.fxn_for_op else type(self)(getattr(self.buf, op.name.lower())(arg))
+  def movement_op(self, op:MovementOps, arg=None): return type(self)(self.fxn_for_op[op](self._buf, arg)) if op in self.fxn_for_op else type(self)(getattr(self._buf, op.name.lower())(arg))
   @classmethod
-  def exec_ast(cls, ast:LazyOp, output_buffer:Optional[GenericExecAST]=None):
+  def exec_ast(cls, ast:LazyOp, output_buffer:Optional[InterpretedBuffer]=None):
     if FusedOps.MULACC in cls.fxn_for_op and ast.op == ReduceOps.SUM and isinstance(ast.src[0], LazyOp) and ast.src[0].op == BinaryOps.MUL:
       ast = LazyOp(FusedOps.MULACC, ast.src[0].src, ast.arg)
     srcs = [cls.exec_ast(x) if isinstance(x, LazyOp) else x for x in ast.src]
@@ -68,22 +90,57 @@ class GenericExecAST(DeviceBuffer):  # pylint: disable=abstract-method
     if ast.op in BinaryOps: assert srcs[0].shape == srcs[1].shape, f"BinaryOps shape mismatch {srcs[0].shape} != {srcs[1].shape}"
     if ast.op in ReduceOps: assert all(r == n or n == 1 for r,n in zip(srcs[0].shape, ast.arg)), f"ReduceOps can't reduce {srcs[0].shape} -> {ast.arg}"
     if ast.op in MovementOps: ret = srcs[0].movement_op(ast.op, ast.arg)
-    else: ret = cls(cls.fxn_for_op[ast.op](*([x.buf for x in srcs] + ([ast.arg] if ast.arg else []))))
+    else: ret = cls(cls.fxn_for_op[ast.op](*([x._buf for x in srcs] + ([ast.arg] if ast.arg else []))))
     if output_buffer is not None:
       assert output_buffer.shape == ret.shape
-      output_buffer.buf = ret.buf
+      output_buffer._buf = ret._buf
       return output_buffer
     else:
       return ret
-def get_lazyop_info(ast:LazyOp): return GenericExecAST.exec_ast(map_buffers({x:GenericExecAST(GenericShape(x.shape)) for x in get_buffers(ast)}, ast)).buf
+def get_lazyop_info(ast:LazyOp): return InterpretedBuffer.exec_ast(map_buffers({x:InterpretedBuffer(GenericShape(x.shape)) for x in get_buffers(ast)}, ast))._buf
 
 # assumes you are using ShapeTracker
 # used in GPUBuffer and LLVMBuffer
-class ExplicitExecAST(DeviceBuffer):  # pylint: disable=abstract-method
-  def __init__(self, shape:Union[ShapeTracker, Tuple[int, ...]], hostbuf=None):
+class CompiledBuffer(DeviceBuffer):  # pylint: disable=abstract-method
+  def __init__(self, shape:Union[ShapeTracker, Tuple[int, ...]], hostbuf:Optional[CompiledBuffer]=None, backing:Optional[np.ndarray]=None, force_create=False):
     self.st = shape if isinstance(shape, ShapeTracker) else ShapeTracker(tuple(shape))
     self.shape = self.st.shape
     self._base_shape : Tuple[int, ...] = hostbuf._base_shape if hostbuf is not None else self.shape
+    self._buf = hostbuf._buf if hostbuf is not None else None
+    self._backing : Optional[np.ndarray] = hostbuf._backing if hostbuf is not None else backing
+    if (self._backing is not None and self._backing.shape != (1,)) or force_create: self.raw()
+
+  # TODO: not GPUBuffer, get name of class
+  def __repr__(self): return f"GPUBuffer(shape={self.st}, hostbuf=GPUBuffer(shape={self._base_shape}" + (f", backing=np.array({self._backing}, dtype=np.float32)))" if self._backing else ", force_create=True))")
+
+  raw_buffer_type : Type[RawBuffer]
+  @classmethod
+  def create_raw_buffer(cls, shape, backing) -> RawBuffer:
+    assert backing is None or prod(shape) == prod(backing.shape), "backing has the wrong shape"
+    assert backing is None or GlobalCounters.cache is None, f"can't copy in {backing.shape} while caching"
+    return cls.raw_buffer_type(4*prod(shape)) if backing is None else cls.raw_buffer_type.fromCPU(backing)
+  def raw(self) -> RawBuffer:
+    if self._buf is None: self._buf = self.create_raw_buffer(self._base_shape, self._backing)
+    self._backing = None
+    return self._buf
+
+  @classmethod
+  def fromCPU(cls, x:np.ndarray) -> CompiledBuffer: return cls(x.shape, backing=x.view(np.ndarray).astype(np.float32).ravel())
+  def toCPU(self) -> np.ndarray:
+    assert GlobalCounters.cache is None, f"can't copy out {self} while caching"
+    return self.contiguous().raw().toCPU().reshape(self.shape)
+
+  codegen_type : Any
+  runtime_type : Type
+  method_cache : Dict[str, Callable] = {}
+  @classmethod
+  def exec_ast(cls, ast:LazyOp, output_buffer:Optional[CompiledBuffer]=None):
+    k = cls.codegen_type(ast, output_buffer)
+    if k.key not in cls.method_cache: cls.method_cache[k.key] = k.codegen().build(cls.runtime_type)
+    prg = cls.method_cache[k.key]
+    if GlobalCounters.cache is not None: GlobalCounters.cache.append((prg, k.bufs))
+    prg(*k.bufs)
+    return k.ret
 
   # universal for shape tracked
   def contiguous(self): return self if self.st.contiguous and prod(self._base_shape) == prod(self.shape) else type(self).exec_ast(LazyOp(op=UnaryOps.NOOP, src=(self,)))
@@ -92,12 +149,12 @@ class ExplicitExecAST(DeviceBuffer):  # pylint: disable=abstract-method
 class GlobalCounters:
   global_ops : ClassVar[int] = 0
   global_mem : ClassVar[int] = 0
-  time_sum : ClassVar[int] = 0
+  time_sum_s : ClassVar[float] = 0.0
   kernel_count : ClassVar[int] = 0
   mem_used : ClassVar[int] = 0   # NOTE: this is not reset
   cache : ClassVar[Optional[list]] = None
   @staticmethod
-  def reset(): GlobalCounters.global_ops, GlobalCounters.global_mem, GlobalCounters.time_sum, GlobalCounters.kernel_count, GlobalCounters.cache = 0,0,0,0,None
+  def reset(): GlobalCounters.global_ops, GlobalCounters.global_mem, GlobalCounters.time_sum_s, GlobalCounters.kernel_count, GlobalCounters.cache = 0,0,0.0,0,None
   @staticmethod
   def log_kernel(op_estimate:int, mem_estimate:int):
     GlobalCounters.kernel_count += 1
diff --git a/tinygrad/runtime/clang.py b/tinygrad/runtime/clang.py
deleted file mode 100644
index 7068f08a5f..0000000000
--- a/tinygrad/runtime/clang.py
+++ /dev/null
@@ -1,38 +0,0 @@
-import ctypes
-import os
-import numpy as np
-import hashlib
-import subprocess
-from collections import defaultdict
-from typing import List, Final, Dict
-from tinygrad.helpers import DEBUG
-import platform
-OSX = platform.system() == "Darwin"
-
-class CLBuffer:
-  def __init__(self, size): self._cl = (ctypes.c_float * (size))()
-  def copyin(self, b:np.ndarray): ctypes.memmove(self._cl, b.ctypes.data, b.size*4)
-  def copyout(self, a:np.ndarray):
-    np.copyto(a, np.ctypeslib.as_array(self._cl)[:a.size].reshape(a.shape))
-
-class CLProgram:
-  kernel_prefix, buffer_prefix, smem_prefix, barrier = "", "", "", ""
-  gid = [f"gid[{i}]" for i in range(3)]
-  lid = [f"lid[{i}]" for i in range(3)]
-  extra_args : List[str] = []
-  kernel_cnt : Final[Dict[str, int]] = defaultdict(int)
-  # TODO: remove name, factor out op_estimate and mem_estimate
-  def __init__(self, name:str, prg:str, rename=True, op_estimate=0, mem_estimate=0):
-    self.name = f"{name}{('_N'+str(CLProgram.kernel_cnt[name])) if CLProgram.kernel_cnt[name] else str()}" if rename else name
-    CLProgram.kernel_cnt[name] += 1
-    self.prg = prg.replace(f"{name}(", f"{self.name}(")
-    prg = "#include <math.h>\n#define max(x,y) ((x>y)?x:y)\n" + prg
-    if DEBUG >= 4: print(prg)  # TODO: outside runtime!
-    # TODO: is there a way to not write this to disk?
-    fn = f"/tmp/clang_{hashlib.md5(prg.encode('utf-8')).hexdigest()}.{'dylib' if OSX else 'so'}"
-    if not os.path.exists(fn):
-      subprocess.check_output(['clang', '-shared', '-O2', '-Wall','-Werror', '-lm', '-fPIC', '-x', 'c', '-', '-o', fn+".tmp"], input=prg.encode('utf-8'))
-      os.rename(fn+".tmp", fn)
-    self.lib = ctypes.CDLL(fn)
-    self.fxn = self.lib[name]
-  def __call__(self, *args): self.fxn(*args[2:])
diff --git a/tinygrad/runtime/cuda.py b/tinygrad/runtime/cuda.py
deleted file mode 100644
index 95f0367046..0000000000
--- a/tinygrad/runtime/cuda.py
+++ /dev/null
@@ -1,37 +0,0 @@
-from typing import Optional, List
-import pycuda.autoprimaryctx # type: ignore # pylint: disable=unused-import # noqa: F401
-import pycuda.driver as cuda # type: ignore
-from pycuda.compiler import compile # type: ignore
-import numpy as np
-from tinygrad.helpers import DEBUG
-from tinygrad.ops import GlobalCounters
-
-class CLBuffer:
-  def __init__(self, size): self._cl = cuda.mem_alloc(size)
-  def copyin(self, b:np.ndarray, stream:Optional[cuda.Stream]=None): cuda.memcpy_htod_async(self._cl, b, stream)
-  def copyout(self, a:np.ndarray): cuda.memcpy_dtoh(a, self._cl)
-
-class CLProgram:
-  kernel_prefix = "__global__"
-  buffer_prefix = ""
-  smem_prefix = "__shared__ "
-  barrier = "__syncthreads();"
-  float4 = "make_float4"
-  gid = [f'blockDim.{chr(120+i)}*blockIdx.{chr(120+i)}+threadIdx.{chr(120+i)}' for i in range(3)]
-  lid = [f'threadIdx.{chr(120+i)}' for i in range(3)]
-  extra_args : List[str] = []
-  def __init__(self, name:str, prg:str, binary=False, shared=0, op_estimate:int=0, mem_estimate:int=0):
-    self.name, self.op_estimate, self.mem_estimate, self.shared = name, op_estimate, mem_estimate, shared
-    if DEBUG >= 4 and not binary: print("CUDA compile", prg)
-    if not binary: prg = compile(prg, target="ptx", no_extern_c=True).decode('utf-8')
-    if DEBUG >= 5: print(prg)
-    self.prg = cuda.module_from_buffer(prg.encode('utf-8')).get_function(prg.split(".visible .entry ")[1].split("(")[0])
-
-  def __call__(self, global_size, local_size, *args):
-    local_size = (local_size + [1] * (3 - len(local_size))) if local_size is not None else (1,1,1)
-    global_size = global_size + [1] * (3 - len(global_size))
-    assert all(x%y == 0 for x,y in zip(global_size, local_size)), f"local:{local_size} must divide global:{global_size}"
-    global_size = [x//y for x,y in zip(global_size, local_size)]
-    if DEBUG >= 2: print("CUDA launch", global_size, local_size)
-    self.prg(*args, block=tuple(local_size), grid=tuple(global_size), shared=self.shared)
-    GlobalCounters.log_kernel(self.op_estimate, self.mem_estimate)
\ No newline at end of file
diff --git a/tinygrad/runtime/metal.py b/tinygrad/runtime/metal.py
deleted file mode 100644
index 2ffdeacfbc..0000000000
--- a/tinygrad/runtime/metal.py
+++ /dev/null
@@ -1,98 +0,0 @@
-# pip3 install pyobjc-framework-Metal pyobjc-framework-libdispatch
-import Metal, Cocoa, libdispatch # type: ignore
-import numpy as np
-from typing import List, Any
-from tinygrad.ops import GlobalCounters
-from tinygrad.helpers import prod, getenv, DEBUG
-import subprocess, pathlib
-
-METAL_XCODE = getenv("METAL_XCODE")
-
-device = Metal.MTLCreateSystemDefaultDevice()
-mtl_queue = device.newCommandQueue()
-mtl_buffers_in_flight : List[Any] = []
-
-def sync():
-  global mtl_buffers_in_flight
-  for cbuf in mtl_buffers_in_flight: cbuf.waitUntilCompleted()
-  mtl_buffers_in_flight = []
-
-class CLBuffer:
-  def __init__(self, size): self._cl = device.newBufferWithLength_options_(size, Metal.MTLResourceStorageModeShared)
-  def __del__(self): self._cl.release()
-
-  def copyin(self, b:np.ndarray):
-    np.copyto(np.frombuffer(self._cl.contents().as_buffer(self._cl.length()), dtype=np.float32), b.reshape(-1).data)
-
-  def toCPU(self):
-    sync()
-    return np.frombuffer(self._cl.contents().as_buffer(self._cl.length()), dtype=np.float32)
-
-  # TODO: remove copyout everywhere
-  def copyout(self, a:np.ndarray): np.copyto(a, self.toCPU().reshape(a.shape))
-
-class CLProgram:
-  kernel_prefix = "#include <metal_stdlib>\nusing namespace metal;\nkernel"
-  buffer_prefix = "device "
-  smem_prefix = "threadgroup "
-  barrier = "threadgroup_barrier(mem_flags::mem_threadgroup);"
-  float4 = "float4"
-  gid = [f"gid.{chr(120+i)}" for i in range(3)]
-  lid = [f"lid.{chr(120+i)}" for i in range(3)]
-  extra_args = ['uint3 gid [[thread_position_in_grid]]', 'uint3 lid [[thread_position_in_threadgroup]]']
-  def __init__(self, name:str, prg:str, op_estimate:int=0, mem_estimate:int=0):
-    self.name, self.op_estimate, self.mem_estimate = name, op_estimate, mem_estimate
-    if DEBUG >= 4: print("Metal compile", prg)
-    if DEBUG >= 6:  # dump llvm
-      air = subprocess.check_output(['xcrun', '-sdk', 'macosx', 'metal', '-x', 'metal', '-c', '-', '-o', '-'], input=prg.encode('utf-8'))
-      dis = subprocess.check_output(['/Users/kafka/Downloads/clang+llvm-15.0.7-arm64-apple-darwin22.0/bin/llvm-dis'], input=air)
-      print(dis.decode('utf-8'))
-    if METAL_XCODE:
-      air = subprocess.check_output(['xcrun', '-sdk', 'macosx', 'metal', '-x', 'metal', '-c', '-', '-o', '-'], input=prg.encode('utf-8'))
-      lib = subprocess.check_output(['xcrun', '-sdk', 'macosx', 'metallib', '-', '-o', '-'], input=air)
-      data = libdispatch.dispatch_data_create(lib, len(lib), None, None)
-      self.library, err = device.newLibraryWithData_error_(data, None)
-    else:
-      options = Metal.MTLCompileOptions.alloc().init()
-      self.library, err = device.newLibraryWithSource_options_error_(prg, options, None)
-    assert err is None, str(err)
-    self.fxn = self.library.newFunctionWithName_(name) #self.library.functionNames()[0]
-    # hacks to disassemble shader
-    if DEBUG >= 5:
-      arc, err = device.newBinaryArchiveWithDescriptor_error_(Metal.MTLBinaryArchiveDescriptor.alloc().init(), None)
-      assert err is None, str(err)
-      desc = Metal.MTLComputePipelineDescriptor.alloc().init()
-      desc.setComputeFunction_(self.fxn)
-      _, err = arc.addComputePipelineFunctionsWithDescriptor_error_(desc, None)
-      assert err is None, str(err)
-      _, err = arc.serializeToURL_error_(Cocoa.NSURL.URLWithString_("file:///tmp/shader.bin"), None)
-      assert err is None, str(err)
-      # clone https://github.com/dougallj/applegpu.git in the root of tinygrad
-      import os
-      os.system(f"cd {pathlib.Path(__file__).parent.parent.parent}/applegpu && python3 compiler_explorer.py /tmp/shader.bin")
-    self.pipeline_state, err = device.newComputePipelineStateWithFunction_error_(self.fxn, None)
-    assert err is None, str(err)
-
-  def __call__(self, global_size, local_size, *args):
-    global_size += [1] * (3-len(global_size))
-    if local_size is None: local_size = [32]
-    local_size += [1] * (3-len(local_size))
-
-    assert prod(local_size) <= self.pipeline_state.maxTotalThreadsPerThreadgroup(), f"local size {local_size} bigger than {self.pipeline_state.maxTotalThreadsPerThreadgroup()} with exec width {self.pipeline_state.threadExecutionWidth()} memory length {self.pipeline_state.staticThreadgroupMemoryLength()}"
-    command_buffer = mtl_queue.commandBuffer()
-    encoder = command_buffer.computeCommandEncoder()
-    encoder.setComputePipelineState_(self.pipeline_state)
-    for i,a in enumerate(args):
-      encoder.setBuffer_offset_atIndex_(a, 0, i)
-    encoder.dispatchThreads_threadsPerThreadgroup_(Metal.MTLSize(*global_size), Metal.MTLSize(*local_size))
-    encoder.endEncoding()
-    command_buffer.commit()
-    if DEBUG >= 2:
-      command_buffer.waitUntilCompleted()
-      et = command_buffer.GPUEndTime() - command_buffer.GPUStartTime()
-      print(f"METAL et {et*1e6:8.2f} us  {self.name:28s} launch {str(global_size):18s} {local_size}")
-      GlobalCounters.time_sum += et
-    else:
-      mtl_buffers_in_flight.append(command_buffer)
-    GlobalCounters.log_kernel(self.op_estimate, self.mem_estimate)
-    return command_buffer
diff --git a/tinygrad/runtime/opencl.py b/tinygrad/runtime/opencl.py
deleted file mode 100644
index 515f745e0b..0000000000
--- a/tinygrad/runtime/opencl.py
+++ /dev/null
@@ -1,101 +0,0 @@
-import functools, platform
-import numpy as np
-import pyopencl as cl  # type: ignore
-from typing import Dict, Optional, Tuple, List, ClassVar, Final
-from collections import defaultdict
-from tinygrad.ops import GlobalCounters
-from tinygrad.helpers import getenv, DEBUG
-
-OSX = platform.system() == "Darwin"
-OSX_TIMING_RATIO = (125/3) if OSX else 1.0   # see test/external_osx_profiling.py to determine this ratio. it's in like GPU clocks or something
-
-CLCACHE = getenv("CLCACHE", 1)
-FLOAT16 = getenv("FLOAT16", 0)
-
-class CL:
-  BUFFER_CACHE : ClassVar[Dict[int, List[cl.Buffer]]] = defaultdict(list)
-  cl_ctx : ClassVar[Optional[cl.Context]] = None
-  cl_queue : ClassVar[Optional[cl.CommandQueue]] = None
-  def __init__(self) -> None:
-    if CL.cl_queue is not None: return   # already initted
-    devices : List[cl.Device] = sum([x.get_devices(device_type=cl.device_type.GPU) for x in cl.get_platforms()], [])
-    if len(devices) == 0:  # settle for CPU
-      devices = sum([x.get_devices(device_type=cl.device_type.CPU) for x in cl.get_platforms()], [])
-    CL.cl_ctx = cl.Context(devices=[devices[getenv("CL_DEVICE", 0)]])
-    if len(devices) > 1 or DEBUG >= 1: print(f"using {CL.cl_ctx.devices}")
-    CL.cl_queue = cl.CommandQueue(self.cl_ctx, properties=cl.command_queue_properties.PROFILING_ENABLE)  # this is an in-order command queue
-
-  @staticmethod
-  def enqueue_copy(a, b, is_blocking=False):
-    if DEBUG >= 1: print(f"**CL**        copy in {b.shape}" if isinstance(b, np.ndarray) else f"**CL**        copy OUT {a.shape}")
-    cl.enqueue_copy(CL().cl_queue, a, b, is_blocking=is_blocking)
-
-class CLBuffer:
-  def __init__(self, size):
-    if DEBUG >= 4: print(f"allocate GPU Buffer {size}")
-    if len(CL.BUFFER_CACHE[size]) > 0:
-      self._cl = CL.BUFFER_CACHE[size].pop()
-    else:
-      # TODO: on GPU OOM, clear the cache
-      self._cl = cl.Buffer(CL().cl_ctx, cl.mem_flags.READ_WRITE, size)
-      GlobalCounters.mem_used += self._cl.size
-
-  def __del__(self):
-    if CLCACHE: CL.BUFFER_CACHE[self._cl.size].append(self._cl)
-    else: GlobalCounters.mem_used -= self._cl.size
-
-  def copyin(self, b:np.ndarray): CL.enqueue_copy(self._cl, b, False)
-  def copyout(self, a:np.ndarray): CL.enqueue_copy(a, self._cl, True)
-
-class CLImage:
-  fmt : Final = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.HALF_FLOAT if FLOAT16 else cl.channel_type.FLOAT)
-
-  def __init__(self, shape):
-    self._cl = cl.Image(CL().cl_ctx, cl.mem_flags.READ_WRITE, CLImage.fmt, shape=(shape[1], shape[0]))
-    GlobalCounters.mem_used += self._cl.row_pitch * self._cl.height
-
-  def __del__(self):
-    GlobalCounters.mem_used -= self._cl.row_pitch * self._cl.height
-
-  def copyin(self, b:np.ndarray): raise NotImplementedError("no copyin for CLImage")
-  def copyout(self, a:np.ndarray): raise NotImplementedError("no copyout for CLImage")
-
-@functools.lru_cache(maxsize=None)
-class CLProgram:
-  kernel_prefix = "__kernel"
-  buffer_prefix = "__global "
-  smem_prefix = "__local "
-  kernel_cnt : Final[Dict[str, int]] = defaultdict(int)
-  barrier = "barrier(CLK_LOCAL_MEM_FENCE);"
-  float4 = "(float4)"
-  gid = [f'get_global_id({i})' for i in range(3)]
-  lid = [f'get_local_id({i})' for i in range(3)]
-  extra_args : List[str] = []
-  def __init__(self, name:str, prg:str, options:Tuple[str, ...]=tuple(), argdtypes=None, rename=True, binary=False, op_estimate=0, mem_estimate=0):
-    self.name = f"{name}{('_N'+str(CLProgram.kernel_cnt[name])) if CLProgram.kernel_cnt[name] else str()}" if rename else name
-    self.prg, self.options, self.argdtypes, self.op_estimate, self.mem_estimate = prg.replace(f"{name}(", f"{self.name}(") if rename else prg, options, argdtypes, op_estimate, mem_estimate
-    self.clprogram = cl.Program(CL().cl_ctx, CL().cl_ctx.devices, [self.prg]) if binary else cl.Program(CL().cl_ctx, self.prg)  # type: ignore
-    try:
-      self.clprg = self.clprogram.build(options=list(self.options)).__getattr__(self.name)
-    except cl.RuntimeError as e:
-      if DEBUG >= 3: print("FAILED TO BUILD", self.prg)
-      raise e
-    if self.argdtypes is not None:
-      self.clprg.set_scalar_arg_dtypes(self.argdtypes)
-    CLProgram.kernel_cnt[name] += 1
-  def __call__(self, *args) -> cl.Event:
-    if DEBUG >= 4: print(args[0], args[1], self.prg)
-    # print the PTX for NVIDIA. TODO: probably broken for everything else
-    if DEBUG >= 5 and not OSX: print(self.clprogram.get_info(cl.program_info.BINARIES)[0].decode('utf-8'))
-    e = self.clprg(CL().cl_queue, *args)
-    if DEBUG >= 2:
-      assert CL.cl_queue is not None
-      CL.cl_queue.finish()
-      # NOTE: Profiling is not in ns in OS X, we multiply by a computed ratio
-      et = (e.profile.end - e.profile.start) * OSX_TIMING_RATIO
-      GlobalCounters.time_sum += et
-    if DEBUG >= 1:
-      print(f"**CL** {GlobalCounters.kernel_count:6d} {self.name:28s} args {len(args[2:]):5d}  kernels {str(args[0]):18s} {str(args[1]):12s} OPs {self.op_estimate/1e6:7.1f}M/{GlobalCounters.global_ops/1e9:7.2f}G  mem {GlobalCounters.mem_used/1e9:5.2f} GB " +
-            (str() if DEBUG <= 1 else f"tm {et/1e3:9.2f}us/{GlobalCounters.time_sum/1e6:9.2f}ms ({self.op_estimate/et:8.2f} GFLOPS)"))
-    GlobalCounters.log_kernel(self.op_estimate, self.mem_estimate)
-    return e
diff --git a/tinygrad/runtime/ops_clang.py b/tinygrad/runtime/ops_clang.py
new file mode 100644
index 0000000000..7d32b3baf5
--- /dev/null
+++ b/tinygrad/runtime/ops_clang.py
@@ -0,0 +1,37 @@
+import ctypes
+import os, time
+import numpy as np
+import hashlib
+import subprocess
+from collections import defaultdict
+from typing import Final, Dict
+from tinygrad.ops import CompiledBuffer, RawBufferCopyIn
+from tinygrad.codegen.gpu import GPUCodegen
+import platform
+OSX = platform.system() == "Darwin"
+
+class RawMallocBuffer(RawBufferCopyIn):
+  def __init__(self, size): self._buf = (ctypes.c_float * (size//4))()
+  def copyin(self, x:np.ndarray): ctypes.memmove(self._buf, x.ctypes.data, x.size*4)
+  def toCPU(self): return np.ctypeslib.as_array(self._buf)
+
+class ClangProgram:
+  kernel_cnt : Final[Dict[str, int]] = defaultdict(int)
+  def __init__(self, name:str, prg:str):
+    prg = "#include <math.h>\n#define max(x,y) ((x>y)?x:y)\n" + prg
+    # TODO: is there a way to not write this to disk?
+    fn = f"/tmp/clang_{hashlib.md5(prg.encode('utf-8')).hexdigest()}.{'dylib' if OSX else 'so'}"
+    if not os.path.exists(fn):
+      subprocess.check_output(['clang', '-shared', '-O2', '-Wall','-Werror', '-lm', '-fPIC', '-x', 'c', '-', '-o', fn+".tmp"], input=prg.encode('utf-8'))
+      os.rename(fn+".tmp", fn)
+    self.lib = ctypes.CDLL(fn)
+    self.fxn = self.lib[name]
+  def __call__(self, *args, wait=False):
+    if wait: st = time.monotonic()
+    self.fxn(*[x._buf for x in args[2:]])
+    if wait: return time.monotonic()-st
+
+class ClangBuffer(CompiledBuffer):
+  raw_buffer_type = RawMallocBuffer
+  codegen_type = GPUCodegen   # clang is the default
+  runtime_type = ClangProgram
diff --git a/tinygrad/llops/ops_cpu.py b/tinygrad/runtime/ops_cpu.py
similarity index 95%
rename from tinygrad/llops/ops_cpu.py
rename to tinygrad/runtime/ops_cpu.py
index e5ca55617b..5d495d9442 100644
--- a/tinygrad/llops/ops_cpu.py
+++ b/tinygrad/runtime/ops_cpu.py
@@ -1,7 +1,7 @@
 import numpy as np
 import operator
 from typing import ClassVar, Callable, Dict
-from tinygrad.ops import UnaryOps, BinaryOps, MovementOps, ReduceOps, FusedOps, GenericExecAST, Op
+from tinygrad.ops import UnaryOps, BinaryOps, MovementOps, ReduceOps, FusedOps, InterpretedBuffer, Op
 from tinygrad.helpers import shape_to_axis
 
 base_fxn_for_op : Dict[Op, Callable] = {
@@ -30,9 +30,9 @@ numpy_fxn_for_op : Dict[Op, Callable] = {**base_fxn_for_op, **{
   FusedOps.MULACC: einsum_mulacc(lambda s,a,b: np.einsum(s, a.copy(), b.copy()), lambda x: x.strides, np.broadcast_to)
 }}
 
-class CPUBuffer(GenericExecAST):
+class CPUBuffer(InterpretedBuffer):
   fxn_for_op : ClassVar = numpy_fxn_for_op
 
   @staticmethod
   def fromCPU(x): return CPUBuffer(x)
-  def toCPU(x): return x.buf
+  def toCPU(x): return x._buf
diff --git a/tinygrad/runtime/ops_cuda.py b/tinygrad/runtime/ops_cuda.py
new file mode 100644
index 0000000000..7f8fc265ba
--- /dev/null
+++ b/tinygrad/runtime/ops_cuda.py
@@ -0,0 +1,38 @@
+from typing import Optional
+import pycuda.autoprimaryctx # type: ignore # pylint: disable=unused-import # noqa: F401
+import pycuda.driver as cuda # type: ignore
+from pycuda.compiler import compile # type: ignore
+import numpy as np
+from tinygrad.helpers import DEBUG
+from tinygrad.ops import CompiledBuffer, RawBufferCopyInOut
+from tinygrad.codegen.gpu import GPUCodegen, GPULanguage
+
+class RawCUDABuffer(RawBufferCopyInOut):
+  def __init__(self, size): self.size, self._cl = size, cuda.mem_alloc(size)
+  def copyin(self, x:np.ndarray, stream:Optional[cuda.Stream]=None): cuda.memcpy_htod_async(self._cl, x, stream)
+  def copyout(self, x:np.ndarray): cuda.memcpy_dtoh(x, self._cl)
+
+class CUDAProgram:
+  def __init__(self, name:str, prg:str, binary=False):
+    if not binary: prg = compile(prg, target="ptx", no_extern_c=True).decode('utf-8')
+    if DEBUG >= 5: print(prg)
+    # TODO: name is wrong
+    self.prg = cuda.module_from_buffer(prg.encode('utf-8')).get_function(prg.split(".visible .entry ")[1].split("(")[0])
+
+  def __call__(self, global_size, local_size, *args, wait=False):
+    local_size = (local_size + [1] * (3 - len(local_size))) if local_size is not None else (1,1,1)
+    global_size = global_size + [1] * (3 - len(global_size))
+    assert all(x%y == 0 for x,y in zip(global_size, local_size)), f"local:{local_size} must divide global:{global_size}"
+    global_size = [x//y for x,y in zip(global_size, local_size)]
+    self.prg(*args, block=tuple(local_size), grid=tuple(global_size))
+
+class CUDACodegen(GPUCodegen):
+  lang = GPULanguage(
+    kernel_prefix = "__global__", smem_prefix = "__shared__ ", barrier = "__syncthreads();", float4 = "make_float4",
+    gid = [f'blockDim.{chr(120+i)}*blockIdx.{chr(120+i)}+threadIdx.{chr(120+i)}' for i in range(3)],
+    lid = [f'threadIdx.{chr(120+i)}' for i in range(3)])
+
+class CUDABuffer(CompiledBuffer):
+  raw_buffer_type = RawCUDABuffer
+  codegen_type = CUDACodegen
+  runtime_type = CUDAProgram
diff --git a/tinygrad/runtime/ops_gpu.py b/tinygrad/runtime/ops_gpu.py
new file mode 100644
index 0000000000..cd7f6335a7
--- /dev/null
+++ b/tinygrad/runtime/ops_gpu.py
@@ -0,0 +1,92 @@
+from __future__ import annotations
+import platform, functools
+import numpy as np
+import pyopencl as cl  # type: ignore
+from typing import Dict, Optional, List, ClassVar, Final
+from collections import defaultdict
+from tinygrad.helpers import IMAGE, DEBUG, getenv
+from tinygrad.ops import CompiledBuffer, GlobalCounters, RawBufferCopyInOut, RawBuffer
+from tinygrad.codegen.gpu import GPUCodegen, GPULanguage
+
+OSX = platform.system() == "Darwin"
+OSX_TIMING_RATIO = (125/3) if OSX else 1.0   # see test/external_osx_profiling.py to determine this ratio. it's in like GPU clocks or something
+CLCACHE = getenv("CLCACHE", 1)
+FLOAT16 = getenv("FLOAT16", 0)
+
+class _CL:
+  @functools.cached_property
+  def cl_ctx(self) -> cl.Context:
+    devices : List[cl.Device] = sum([x.get_devices(device_type=cl.device_type.GPU) for x in cl.get_platforms()], [])
+    if len(devices) == 0: devices = sum([x.get_devices(device_type=cl.device_type.CPU) for x in cl.get_platforms()], []) # settle for CPU
+    if len(devices) > 1 or DEBUG >= 1: print(f"using {devices[getenv('CL_DEVICE', 0)]}")
+    return cl.Context(devices=[devices[getenv("CL_DEVICE", 0)]])
+
+  @functools.cached_property
+  def cl_queue(self) -> cl.CommandQueue:
+    return cl.CommandQueue(CL.cl_ctx, properties=cl.command_queue_properties.PROFILING_ENABLE)  # this is an in-order command queue
+CL = _CL()
+  
+class CLBuffer(RawBufferCopyInOut):
+  # TODO: this can be in RawBuffer generically
+  BUFFER_CACHE : ClassVar[Dict[int, List[cl.Buffer]]] = defaultdict(list)
+
+  def __init__(self, size):
+    self.size = size
+    if len(CLBuffer.BUFFER_CACHE[size]) > 0:
+      self._cl = CLBuffer.BUFFER_CACHE[size].pop()
+    else:
+      # TODO: on GPU OOM, clear the cache
+      self._cl = cl.Buffer(CL.cl_ctx, cl.mem_flags.READ_WRITE, size)
+      GlobalCounters.mem_used += self._cl.size
+
+  def __del__(self):
+    if CLCACHE: CLBuffer.BUFFER_CACHE[self._cl.size].append(self._cl)
+    else: GlobalCounters.mem_used -= self._cl.size
+
+  def copyin(self, x:np.ndarray): cl.enqueue_copy(CL.cl_queue, self._cl, x, is_blocking=False)
+  def copyout(self, x:np.ndarray): cl.enqueue_copy(CL.cl_queue, x, self._cl, is_blocking=True)
+
+class CLImage(RawBuffer):
+  fmt : Final = cl.ImageFormat(cl.channel_order.RGBA, cl.channel_type.HALF_FLOAT if FLOAT16 else cl.channel_type.FLOAT)
+  IMAGE : Final = True
+
+  def __init__(self, shape):
+    self._cl = cl.Image(CL.cl_ctx, cl.mem_flags.READ_WRITE, CLImage.fmt, shape=(shape[1], shape[0]))
+    GlobalCounters.mem_used += self._cl.row_pitch * self._cl.height
+
+  def __del__(self): GlobalCounters.mem_used -= self._cl.row_pitch * self._cl.height
+
+class CLProgram:
+  def __init__(self, name:str, prg:str, binary=False, argdtypes=None):
+    self.name, self.argdtypes, self.clprogram = name, argdtypes, cl.Program(CL.cl_ctx, CL.cl_ctx.devices, [prg]) if binary else cl.Program(CL.cl_ctx, prg)  # type: ignore
+    try:
+      self._clprg = self.clprogram.build()
+    except cl.RuntimeError as e:
+      if DEBUG >= 3: print("FAILED TO BUILD", prg)
+      raise e
+    self.clprg = self._clprg.__getattr__(name)
+    if DEBUG >= 5 and not OSX: print(self.clprogram.get_info(cl.program_info.BINARIES)[0].decode('utf-8'))  # print the PTX for NVIDIA. TODO: probably broken for everything else
+    if self.argdtypes is not None: self.clprg.set_scalar_arg_dtypes(self.argdtypes)
+
+  def __call__(self, global_size, local_size, *bufs, wait=False) -> Optional[float]:
+    e = self.clprg(CL.cl_queue, global_size, local_size, *[x._cl if isinstance(x, (CLBuffer, CLImage)) else x for x in bufs])
+    if wait:
+      CL.cl_queue.finish()
+      return ((e.profile.end - e.profile.start) * OSX_TIMING_RATIO) * 1e-9
+    return None
+
+class CLCodegen(GPUCodegen):
+  lang = GPULanguage(
+    kernel_prefix = "__kernel", buffer_prefix = "__global ", smem_prefix = "__local ",
+    barrier = "barrier(CLK_LOCAL_MEM_FENCE);", float4 = "(float4)",
+    gid = [f'get_global_id({i})' for i in range(3)], lid = [f'get_local_id({i})' for i in range(3)])
+
+class GPUBuffer(CompiledBuffer):
+  raw_buffer_type = CLBuffer
+  # override this method for image
+  @classmethod
+  def create_raw_buffer(cls, shape, backing) -> RawBuffer:
+    if len(shape) == 3 and shape[2] == 4 and IMAGE >= 2 and not backing: return CLImage(shape)
+    else: return super().create_raw_buffer(shape, backing)
+  codegen_type = CLCodegen
+  runtime_type = CLProgram
diff --git a/tinygrad/runtime/llvm.py b/tinygrad/runtime/ops_llvm.py
similarity index 53%
rename from tinygrad/runtime/llvm.py
rename to tinygrad/runtime/ops_llvm.py
index 2ff70d301f..7d17fa2b3f 100644
--- a/tinygrad/runtime/llvm.py
+++ b/tinygrad/runtime/ops_llvm.py
@@ -1,13 +1,12 @@
+import time, hashlib, ctypes
 from typing import ClassVar
+from tinygrad.ops import CompiledBuffer
+from tinygrad.runtime.ops_clang import RawMallocBuffer
 from tinygrad.helpers import getenv, DEBUG
-from tinygrad.ops import GlobalCounters
-import hashlib
-import time
-import ctypes
 from ctypes import CFUNCTYPE
+from tinygrad.codegen.llvm import LLVMCodegen
 
 import llvmlite.binding as llvm  # type: ignore
-from llvmlite import ir  # type: ignore
 
 class LLVM:
   target_machine : ClassVar[llvm.targets.TargetMachine] = None
@@ -15,8 +14,7 @@ class LLVM:
   optimizer : ClassVar[llvm.passmanagers.ModulePassManager] = None
 
   def __init__(self):
-    if LLVM.engine is not None:
-      return
+    if LLVM.engine is not None: return
     llvm.initialize()
     llvm.initialize_native_target()
     llvm.initialize_native_asmprinter()
@@ -46,42 +44,26 @@ class LLVM:
     backing_mod.triple = llvm.get_process_triple()
     LLVM.engine = llvm.create_mcjit_compiler(backing_mod, LLVM.target_machine)
 
-  # TODO: LLVMProgram
-  def exec(self, module:ir.Module, bufs, op_estimate=0, mem_estimate=0):
-    module.triple = llvm.get_process_triple()
-    module.data_layout = self.engine.target_data
-    llvm_ir = str(module)
-
-    if DEBUG >= 2:
-      print(llvm_ir)
-
-    mod = llvm.parse_assembly(llvm_ir)
-    mod.verify()
-    LLVM.optimizer.run(mod)
-    if DEBUG >= 4:
-      print("Optimized IR:")
-      print(str(mod))
-    mod.name = hashlib.sha1(llvm_ir.encode('utf-8')).hexdigest()
-    if DEBUG >= 3:
-      print(LLVM.target_machine.emit_assembly(mod))
-    LLVM.engine.add_module(mod)
+class LLVMProgram:
+  def __init__(self, name:str, prg:str, binary=False):
+    self.mod = llvm.parse_assembly(prg)
+    self.mod.verify()
+    LLVM().optimizer.run(self.mod)
+    self.mod.name = hashlib.sha1(prg.encode('utf-8')).hexdigest()
+    if DEBUG >= 5: print(LLVM.target_machine.emit_assembly(self.mod))
+    LLVM.engine.add_module(self.mod)
     LLVM.engine.finalize_object()
+    self.fxn = LLVM.engine.get_function_address(name)
 
-    # call function (NOTE: if the types don't match, there's likely something wrong with the cache)
-    #cfunc = CFUNCTYPE(ctypes.c_int, *[type(x._buf) for x in bufs])(LLVM.engine.get_function_address('exec'))
+  def __del__(self): LLVM.engine.remove_module(self.mod)
 
-    # why is this needed without the types. fixed tests below
-    # LLVM=1 OPT=2 python3 test/test_ops.py TestOps.test_cat TestOps.test_multicat
-    cfunc = CFUNCTYPE(ctypes.c_int, *[ctypes.POINTER(ctypes.c_float) for x in bufs])(LLVM.engine.get_function_address('exec'))
-
-    st = time.monotonic()
+  def __call__(self, unused_global_size, unused_local_size, *bufs, wait=False):
+    cfunc = CFUNCTYPE(ctypes.c_int, *[ctypes.POINTER(ctypes.c_float) for _ in bufs])(self.fxn)
+    if wait: st = time.monotonic()
     cfunc(*[x._buf for x in bufs])
-    et = time.monotonic() - st
-    if DEBUG >= 1:
-      print(f"**LLVM** time {et*1000:7.2f} ms  OPs {op_estimate/1e6:7.2f}M -- {(op_estimate/1e9)/et:5.2f} GFLOPS -- {mem_estimate:10d} reads -- {(mem_estimate*4/1e9)/et:5.2f} GB/s")
-    GlobalCounters.global_ops += op_estimate
-    GlobalCounters.global_mem += mem_estimate
+    if wait: return time.monotonic()-st
 
-    # we are done
-    LLVM.engine.remove_module(mod)
-    return cfunc
+class LLVMBuffer(CompiledBuffer):
+  raw_buffer_type = RawMallocBuffer
+  codegen_type = LLVMCodegen
+  runtime_type = LLVMProgram
diff --git a/tinygrad/runtime/ops_metal.py b/tinygrad/runtime/ops_metal.py
new file mode 100644
index 0000000000..fc363dce88
--- /dev/null
+++ b/tinygrad/runtime/ops_metal.py
@@ -0,0 +1,92 @@
+# pip3 install pyobjc-framework-Metal pyobjc-framework-libdispatch
+import os, subprocess, pathlib, functools
+import Metal, Cocoa, libdispatch # type: ignore
+import numpy as np
+from typing import List, Any
+from tinygrad.codegen.gpu import GPUCodegen, GPULanguage
+from tinygrad.helpers import prod, getenv, DEBUG
+from tinygrad.ops import CompiledBuffer, RawBufferCopyIn
+
+METAL_XCODE = getenv("METAL_XCODE")
+
+class _METAL:
+  mtl_buffers_in_flight : List[Any] = []
+  @functools.cached_property
+  def device(self):
+    return Metal.MTLCreateSystemDefaultDevice()
+  @functools.cached_property
+  def mtl_queue(self):
+    return METAL.device.newCommandQueue()
+METAL = _METAL()
+
+class RawMetalBuffer(RawBufferCopyIn):
+  def __init__(self, size): self.size, self._cl = size, METAL.device.newBufferWithLength_options_(size, Metal.MTLResourceStorageModeShared)
+  def __del__(self): self._cl.release()
+  def _as_np(self): return np.frombuffer(self._cl.contents().as_buffer(self._cl.length()), dtype=np.float32)
+  def copyin(self, x:np.ndarray): np.copyto(self._as_np(), x.reshape(-1).data)
+  def toCPU(self) -> np.ndarray:
+    for cbuf in METAL.mtl_buffers_in_flight: cbuf.waitUntilCompleted()
+    METAL.mtl_buffers_in_flight = []
+    return self._as_np()  # no copy!
+
+class MetalProgram:
+  def __init__(self, name:str, prg:str):
+    if DEBUG >= 6:  # dump llvm
+      air = subprocess.check_output(['xcrun', '-sdk', 'macosx', 'metal', '-x', 'metal', '-c', '-', '-o', '-'], input=prg.encode('utf-8'))
+      dis = subprocess.check_output(['/Users/kafka/Downloads/clang+llvm-15.0.7-arm64-apple-darwin22.0/bin/llvm-dis'], input=air)
+      print(dis.decode('utf-8'))
+    if METAL_XCODE:
+      air = subprocess.check_output(['xcrun', '-sdk', 'macosx', 'metal', '-x', 'metal', '-c', '-', '-o', '-'], input=prg.encode('utf-8'))
+      lib = subprocess.check_output(['xcrun', '-sdk', 'macosx', 'metallib', '-', '-o', '-'], input=air)
+      data = libdispatch.dispatch_data_create(lib, len(lib), None, None)
+      self.library, err = METAL.device.newLibraryWithData_error_(data, None)
+    else:
+      options = Metal.MTLCompileOptions.alloc().init()
+      self.library, err = METAL.device.newLibraryWithSource_options_error_(prg, options, None)
+    assert err is None, str(err)
+    self.fxn = self.library.newFunctionWithName_(name)
+    # hacks to disassemble shader
+    if DEBUG >= 5:
+      arc, err = METAL.device.newBinaryArchiveWithDescriptor_error_(Metal.MTLBinaryArchiveDescriptor.alloc().init(), None)
+      assert err is None, str(err)
+      desc = Metal.MTLComputePipelineDescriptor.alloc().init()
+      desc.setComputeFunction_(self.fxn)
+      _, err = arc.addComputePipelineFunctionsWithDescriptor_error_(desc, None)
+      assert err is None, str(err)
+      _, err = arc.serializeToURL_error_(Cocoa.NSURL.URLWithString_("file:///tmp/shader.bin"), None)
+      assert err is None, str(err)
+      # clone https://github.com/dougallj/applegpu.git in the root of tinygrad
+      os.system(f"cd {pathlib.Path(__file__).parent.parent.parent}/applegpu && python3 compiler_explorer.py /tmp/shader.bin")
+    self.pipeline_state, err = METAL.device.newComputePipelineStateWithFunction_error_(self.fxn, None)
+    assert err is None, str(err)
+
+  def __call__(self, global_size, local_size, *bufs, wait=False):
+    global_size += [1] * (3-len(global_size))
+    if local_size is None: local_size = [32]
+    local_size += [1] * (3-len(local_size))
+
+    assert prod(local_size) <= self.pipeline_state.maxTotalThreadsPerThreadgroup(), f"local size {local_size} bigger than {self.pipeline_state.maxTotalThreadsPerThreadgroup()} with exec width {self.pipeline_state.threadExecutionWidth()} memory length {self.pipeline_state.staticThreadgroupMemoryLength()}"
+    command_buffer = METAL.mtl_queue.commandBuffer()
+    encoder = command_buffer.computeCommandEncoder()
+    encoder.setComputePipelineState_(self.pipeline_state)
+    for i,a in enumerate(bufs): encoder.setBuffer_offset_atIndex_(a._cl, 0, i)
+    encoder.dispatchThreads_threadsPerThreadgroup_(Metal.MTLSize(*global_size), Metal.MTLSize(*local_size))
+    encoder.endEncoding()
+    command_buffer.commit()
+    if wait:
+      command_buffer.waitUntilCompleted()
+      return command_buffer.GPUEndTime() - command_buffer.GPUStartTime()
+    else:
+      METAL.mtl_buffers_in_flight.append(command_buffer)
+
+class MetalCodegen(GPUCodegen):
+  lang = GPULanguage(
+    kernel_prefix = "#include <metal_stdlib>\nusing namespace metal;\nkernel", buffer_prefix = "device ", smem_prefix = "threadgroup ",
+    barrier = "threadgroup_barrier(mem_flags::mem_threadgroup);", float4 = "float4",
+    gid = [f"gid.{chr(120+i)}" for i in range(3)], lid = [f"lid.{chr(120+i)}" for i in range(3)],
+    extra_args = ['uint3 gid [[thread_position_in_grid]]', 'uint3 lid [[thread_position_in_threadgroup]]'])
+
+class MetalBuffer(CompiledBuffer):
+  raw_buffer_type = RawMetalBuffer
+  codegen_type = MetalCodegen
+  runtime_type = MetalProgram
\ No newline at end of file
diff --git a/tinygrad/llops/ops_torch.py b/tinygrad/runtime/ops_torch.py
similarity index 75%
rename from tinygrad/llops/ops_torch.py
rename to tinygrad/runtime/ops_torch.py
index f881fc37cd..120c3900c6 100644
--- a/tinygrad/llops/ops_torch.py
+++ b/tinygrad/runtime/ops_torch.py
@@ -1,8 +1,8 @@
 import torch
-from typing import ClassVar, Final, Dict, Callable
-from tinygrad.ops import UnaryOps, BinaryOps, MovementOps, FusedOps, GenericExecAST, Op
+from typing import ClassVar, Dict, Callable
+from tinygrad.ops import UnaryOps, BinaryOps, MovementOps, FusedOps, InterpretedBuffer, Op
 from tinygrad.helpers import getenv
-from tinygrad.llops.ops_cpu import base_fxn_for_op, einsum_mulacc
+from tinygrad.runtime.ops_cpu import base_fxn_for_op, einsum_mulacc
 
 torch_fxn_for_op : Dict[Op, Callable] = {**base_fxn_for_op, **{
   UnaryOps.EXP: lambda x: x.exp(), UnaryOps.LOG: lambda x: x.log(),
@@ -12,10 +12,9 @@ torch_fxn_for_op : Dict[Op, Callable] = {**base_fxn_for_op, **{
 }}
 
 device = torch.device("cuda:0" if torch.cuda.is_available() else ("mps" if getenv("MPS", 0) else "cpu"))
-class TorchBuffer(GenericExecAST):
+class TorchBuffer(InterpretedBuffer):
   fxn_for_op : ClassVar = torch_fxn_for_op
-  SUPPORTS_SIMPLE_PADDING : Final = True
 
   @staticmethod
   def fromCPU(data): return TorchBuffer(torch.from_numpy(data).requires_grad_(False).to(device))
-  def toCPU(x): return x.buf.cpu().numpy()
+  def toCPU(x): return x._buf.cpu().numpy()