Merge pull request #590 from pengcheng888/main

issue/588 - 为Tensor添加from_torch函数, +*运算符重载

Author: pengcheng888

python/infinicore/__init__.py

@@ -37,6 +37,7 @@
     empty,
     empty_like,
     from_blob,
+    from_torch,
     ones,
     strided_empty,
     strided_from_blob,
@@ -82,6 +83,7 @@
     "empty",
     "empty_like",
     "from_blob",
+    "from_torch",
     "ones",
     "strided_empty",
     "strided_from_blob",

python/infinicore/tensor.py

@@ -2,9 +2,11 @@
 import infinicore.dtype
 from infinicore.lib import _infinicore
 
+from .utils import to_infinicore_dtype
+
 
 class Tensor:
-    def __init__(self, underlying):
+    def __init__(self, underlying, *, _torch_ref=None):
         """An internal method. Please do not use this directly."""
 
         self._underlying = underlying
@@ -15,6 +17,8 @@ def __init__(self, underlying):
             self._underlying.device
         )
 
+        self._torch_ref = _torch_ref
+
     @property
     def shape(self):
         return self._underlying.shape
@@ -86,6 +90,12 @@ def debug(self, filename=None):
         else:
             self._underlying.debug(filename)
 
+    def __add__(self, other):
+        return infinicore.add(self, other)
+
+    def __mul__(self, other):
+        return infinicore.mul(self, other)
+
 
 def empty(size, *, dtype=None, device=None, pin_memory=False):
     return Tensor(
@@ -135,3 +145,17 @@ def strided_from_blob(data_ptr, size, strides, *, dtype=None, device=None):
             data_ptr, size, strides, dtype._underlying, device._underlying
         )
     )
+
+
+def from_torch(torch_tensor) -> Tensor:
+    infini_type = to_infinicore_dtype(torch_tensor.dtype)
+    infini_device = infinicore.device(torch_tensor.device.type, 0)
+    return Tensor(
+        _infinicore.from_blob(
+            torch_tensor.data_ptr(),
+            list(torch_tensor.shape),
+            dtype=infini_type._underlying,
+            device=infini_device._underlying,
+        ),
+        torch_ref=torch_tensor,
+    )

python/infinicore/utils.py

@@ -0,0 +1,47 @@
+import torch
+
+import infinicore
+
+
+def to_torch_dtype(infini_dtype):
+    """Convert infinicore data type to PyTorch data type"""
+    if infini_dtype == infinicore.float16:
+        return torch.float16
+    elif infini_dtype == infinicore.float32:
+        return torch.float32
+    elif infini_dtype == infinicore.bfloat16:
+        return torch.bfloat16
+    elif infini_dtype == infinicore.int8:
+        return torch.int8
+    elif infini_dtype == infinicore.int16:
+        return torch.int16
+    elif infini_dtype == infinicore.int32:
+        return torch.int32
+    elif infini_dtype == infinicore.int64:
+        return torch.int64
+    elif infini_dtype == infinicore.uint8:
+        return torch.uint8
+    else:
+        raise ValueError(f"Unsupported infinicore dtype: {infini_dtype}")
+
+
+def to_infinicore_dtype(torch_dtype):
+    """Convert PyTorch data type to infinicore data type"""
+    if torch_dtype == torch.float32:
+        return infinicore.float32
+    elif torch_dtype == torch.float16:
+        return infinicore.float16
+    elif torch_dtype == torch.bfloat16:
+        return infinicore.bfloat16
+    elif torch_dtype == torch.int8:
+        return infinicore.int8
+    elif torch_dtype == torch.int16:
+        return infinicore.int16
+    elif torch_dtype == torch.int32:
+        return infinicore.int32
+    elif torch_dtype == torch.int64:
+        return infinicore.int64
+    elif torch_dtype == torch.uint8:
+        return infinicore.uint8
+    else:
+        raise ValueError(f"Unsupported torch dtype: {torch_dtype}")

test/infinicore/test.py

@@ -1,6 +1,7 @@
-import infinicore
 import torch
 
+import infinicore
+
 
 def test():
     shape = [2, 3, 4]
@@ -40,5 +41,45 @@ def test():
     print("Test passed")
 
 
+def test2():
+    "测试infinicore.Tensor的from_torch, +* 运算符功能"
+    shape = [1, 2, 3]
+
+    x1_torch = torch.rand(shape, dtype=torch.float32, device="cpu")
+    x2_torch = torch.rand(shape, dtype=torch.float32, device="cpu")
+
+    x1_infini = infinicore.from_torch(x1_torch.clone())
+    x2_infini = infinicore.from_torch(x2_torch.clone())
+
+    ans1_infini = x1_infini + x2_infini
+    ans2_infini = x1_infini * x2_infini
+
+    ans1_torch_ref = x1_torch + x2_torch
+    ans2_torch_ref = x1_torch * x2_torch
+
+    print("----------------------------------------")
+    torch_ans1_result = torch.zeros(shape, dtype=torch.float32, device="cpu")
+    torch_ans2_result = torch.zeros(shape, dtype=torch.float32, device="cpu")
+    torch_ans1 = infinicore.from_blob(
+        torch_ans1_result.data_ptr(),
+        shape,
+        dtype=infinicore.float32,
+        device=infinicore.device("cpu", 0),
+    )
+    torch_ans2 = infinicore.from_blob(
+        torch_ans2_result.data_ptr(),
+        shape,
+        dtype=infinicore.float32,
+        device=infinicore.device("cpu", 0),
+    )
+    torch_ans1.copy_(ans1_infini)
+    torch_ans2.copy_(ans2_infini)
+
+    print("----------------------------------------")
+    print("abs error: ", torch.abs(ans1_torch_ref - torch_ans1_result).max())
+    print("abs error: ", torch.abs(ans2_torch_ref - torch_ans2_result).max())
+
+
 if __name__ == "__main__":
-    test()
+    # test()
+    test2()