feat: add HIP support

optimum/quanto/library/extensions/__init__.py

@@ -19,7 +19,10 @@
 
 
 if torch.cuda.is_available():
-    from .cuda import *
+    if torch.version.cuda:
+        from .cuda import *
+    elif torch.version.hip:
+        from .hip import *
 
 if torch.backends.mps.is_available():
     from .mps import *

optimum/quanto/library/extensions/hip/__init__.py

@@ -0,0 +1,36 @@
+# Copyright 2024 The HuggingFace Team. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import os
+
+import torch
+
+from ..extension import Extension, register_extension
+
+
+__all__ = []
+
+
+ext = Extension(
+    "quanto_hip",
+    root_dir=os.path.dirname(__file__),
+    sources=["unpack.cu", "pybind_module.cpp"],
+    extra_cflags=["-std=c++17"],
+)
+register_extension(ext)
+
+
+@torch.library.impl("quanto::unpack", ["CUDA"])
+def unpack_hip(t: torch.Tensor, bits: int):
+    return ext.lib.unpack(t, bits)

optimum/quanto/library/extensions/hip/pybind_module.cpp

@@ -0,0 +1,21 @@
+// Copyright 2024 The HuggingFace Team. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <torch/extension.h>
+#include "unpack.h"
+
+
+PYBIND11_MODULE(TORCH_EXTENSION_NAME, m) {
+  m.def("unpack", &unpack, "unpack");
+}

optimum/quanto/library/extensions/hip/unpack.cu

@@ -0,0 +1,97 @@
+// Copyright 2024 The HuggingFace Team. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <torch/extension.h>
+#include <cuda.h>
+#include <cuda_runtime.h>
+#include <c10/cuda/CUDAException.h>
+
+inline  unsigned int cdiv(unsigned int a, unsigned int b) { return (a + b - 1) / b;}
+#define BLOCK_SIZE 256
+
+using namespace at;
+
+
+static torch::Tensor allocate_output(const torch::Tensor& input, int bits) {
+    int n_packed = 8 / bits;
+    auto output_shape = input.sizes().vec();
+    output_shape[0] = output_shape[0] * n_packed;
+    return torch::empty(output_shape, input.options());
+}
+
+__global__ void unpack_4bit_kernel(unsigned char* input, unsigned char* output, int n) {
+	int i = blockIdx.x*blockDim.x + threadIdx.x;
+	if(i>=n) return;
+
+	output[i]     = (input[i] & 0x0F);
+	output[i + n] = (input[i] & 0xF0) >> 4;
+}
+
+static torch::Tensor unpack_4bit(const torch::Tensor& input){
+
+	auto output = allocate_output(input, 4);
+
+    const auto numel = input.numel();
+	int blocks = cdiv(numel, BLOCK_SIZE);
+	unpack_4bit_kernel<<<blocks, BLOCK_SIZE>>>(
+        input.data_ptr<unsigned char>(),
+        output.data_ptr<unsigned char>(),
+        numel
+    );
+
+	C10_CUDA_KERNEL_LAUNCH_CHECK();
+
+	return output;
+}
+
+__global__ void unpack_2bit_kernel(unsigned char* input, unsigned char* output, int n) {
+	int i = blockIdx.x*blockDim.x + threadIdx.x;
+	if(i>=n) return;
+
+	output[i]       = (input[i] & 0x03);
+	output[i + n]   = (input[i] & 0x0C) >> 2;
+	output[i + n*2] = (input[i] & 0x30) >> 4;
+	output[i + n*3] = (input[i] & 0xC0) >> 6;
+}
+
+static torch::Tensor unpack_2bit(const torch::Tensor& input){
+
+	auto output = allocate_output(input, 2);
+
+    const auto numel = input.numel();
+	int blocks = cdiv(numel, BLOCK_SIZE);
+	unpack_2bit_kernel<<<blocks, BLOCK_SIZE>>>(
+        input.data_ptr<unsigned char>(),
+        output.data_ptr<unsigned char>(),
+        numel
+    );
+
+	C10_CUDA_KERNEL_LAUNCH_CHECK();
+
+	return output;
+}
+
+torch::Tensor unpack(torch::Tensor &t, int bits) {
+    TORCH_CHECK(t.scalar_type() == torch::kUInt8, "Unsupported data type: ", t.scalar_type());
+    TORCH_CHECK(t.device().is_cuda(), "t must be a CUDA tensor.");
+    TORCH_CHECK(t.is_contiguous(), "t must be contiguous.");
+    switch(bits) {
+      case 4:
+        return unpack_4bit(t);
+      case 2:
+        return unpack_2bit(t);
+      default:
+        throw std::invalid_argument("Can only unpack 2-bit or 4-bit tensors.");
+    }
+}

optimum/quanto/library/extensions/hip/unpack.h

@@ -0,0 +1,17 @@
+// Copyright 2024 The HuggingFace Team. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <torch/extension.h>
+
+torch::Tensor unpack(torch::Tensor &t, int bits);

optimum/quanto/tensor/weights/qbits.py

@@ -101,15 +101,15 @@ def create(qtype, axis, group_size, size, stride, data, scale, shift, requires_g
             and axis == 0
             and group_size == 128
             and len(size) == 2
-            and data.device.type == "cuda"
+            and (data.device.type == "cuda" and torch.version.cuda)
             and torch.cuda.get_device_capability(data.device)[0] >= 8
         ):
             if type(data) is PackedTensor:
                 data = data.unpack()
             return AWQWeightQBitsTensor(qtype, axis, group_size, size, stride, data, scale, shift, requires_grad)
         if qtype == qint4 and scale.dtype == torch.bfloat16 and axis == 0 and group_size == 128 and len(size) == 2:
             if data.device.type == "cpu" or (
-                data.device.type == "cuda"
+                (data.device.type == "cuda" and torch.version.cuda)
                 and version.parse(torch.version.cuda).release >= (12, 1)
                 and torch.cuda.get_device_capability(data.device)[0] >= 8
             ):

optimum/quanto/tensor/weights/qbytes.py

@@ -124,7 +124,7 @@ def create(
             and activation_qtype is None
             and scale.dtype in [torch.float16, torch.bfloat16]
             and len(size) == 2
-            and data.device.type == "cuda"
+            and (data.device.type == "cuda" and torch.version.cuda)
             and axis == 0
             and torch.cuda.get_device_capability(data.device)[0] >= 8
         ):

test/library/test_extensions.py

@@ -6,7 +6,10 @@
 
 extension_names = ["quanto_cpp"]
 if torch.cuda.is_available():
-    extension_names.append("quanto_cuda")
+    if torch.version.cuda:
+        extension_names.append("quanto_cuda")
+    if torch.version.hip:
+        extension_names.append("quanto_hip")
 if torch.backends.mps.is_available():
     extension_names.append("quanto_mps")
 

test/tensor/weights/optimized/test_tinygemm_weight_qbits_tensor.py

@@ -27,6 +27,8 @@
 @pytest.mark.parametrize("out_features", [128, 256, 512, 1024])
 def test_tinygemm_weight_qbits_tensor_from_qbits_tensor(in_features, out_features, device):
     if device.type == "cuda":
+        if torch.version.hip:
+            pytest.skip(reason="TinyGemm not available for ROCm devices")
         if version.parse(torch.version.cuda).release < (12, 1):
             pytest.skip(reason="CUDA runtime must be at least 12.1")
         if torch.cuda.get_device_capability()[0] < 8:
@@ -98,6 +100,8 @@ def test_tinygemm_weight_qbits_tensor_move(device):
 @pytest.mark.parametrize("use_bias", [True, False], ids=["bias", "no-bias"])
 def test_tinygemm_weight_qbits_tensor_linear(batch_size, tokens, embeddings, use_bias, device):
     if device.type == "cuda":
+        if torch.version.hip:
+            pytest.skip(reason="TinyGemm not available for ROCm devices")
         if version.parse(torch.version.cuda).release < (12, 1):
             pytest.skip(reason="CUDA runtime must be at least 12.1")
         if torch.cuda.get_device_capability()[0] < 8: