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79 lines
2.6 KiB
79 lines
2.6 KiB
8 hours ago
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import unittest
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from tinygrad import TinyJit, Tensor
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# The JIT functions as a "capturing" JIT.
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# Whatever kernels ran in the JIT the second run through the function will be the kernels that will run from then on.
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# Explicit inputs to the function are updated in the JIT graph to the new inputs.
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# JITs have four tensor types
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# 1. Tensors that are explicit in the input, aka what's passed in. TODO: support lists/dicts/classes, anything get_state works on
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# 2. Tensors that are explicit in the output, aka what's returned. TODO: same as above
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# 3. Tensors that are implicit in the input as a closure.
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# 4. Tensors that are implicit in the output because they were assigned to and realized.
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# explicit inputs and outputs are realized on their way in and out of the JIT
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# there's a whole bunch of edge cases and weirdness here that needs to be tested and clarified.
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class TestJitCases(unittest.TestCase):
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def test_explicit(self):
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# this function has an explicit input and an explicit output
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@TinyJit
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def f(x:Tensor):
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ret:Tensor = x*2
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return ret
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for i in range(5):
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out = f(Tensor([i]))
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self.assertEqual(out.item(), i*2)
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def test_implicit_input(self):
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# x is the implicit input (like a weight)
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x = Tensor([0])
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# this function has an implicit input and an explicit output
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@TinyJit
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def f():
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ret:Tensor = x*2
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return ret
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for i in range(5):
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# NOTE: this must be realized here, otherwise the update doesn't happen
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# if we were explicitly tracking the implicit input Tensors, we might not need this realize
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x.assign(Tensor([i])).realize()
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out = f()
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self.assertEqual(out.item(), i*2)
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def test_implicit_output(self):
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# out is the implicit output (it's assigned to)
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out = Tensor([0])
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# this function has an explicit input and an implicit output
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@TinyJit
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def f(x:Tensor):
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# NOTE: this must be realized here
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# if we were explicitly tracking the implicit output Tensors, we might not need this realize
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out.assign(x*2).realize()
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for i in range(5):
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f(Tensor([i]))
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self.assertEqual(out.item(), i*2)
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def test_implicit_io(self):
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# x is the implicit input (like a weight)
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# out is the implicit output (it's assigned to)
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x = Tensor([0])
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out = Tensor([0])
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# this function has an implicit input and an implicit output
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@TinyJit
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def f():
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out.assign(x*2).realize() # NOTE: this must be realized here
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for i in range(5):
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x.assign(Tensor([i])).realize()
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f()
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self.assertEqual(out.item(), i*2)
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if __name__ == '__main__':
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unittest.main()
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