[slimtensor] Add item() methods with CUDA and CPU support for scalar value extraction #16445
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…value extraction Add two `item()` methods to SlimTensor for extracting scalar values from single-element tensors: 1. **`item<T>()`** - Templated version requiring explicit type specification 2. **`item()`** - Non-templated version that auto-detects dtype and returns double Both methods: - Support all 7 slim dtypes (Float, BFloat16, Long, Int, Short, Char, Bool) - Handle CUDA tensors by automatically copying data to CPU - Validate that tensor has exactly 1 element Differential Revision: [D90034340](https://our.internmc.facebook.com/intern/diff/D90034340/) [ghstack-poisoned]
🔗 Helpful Links🧪 See artifacts and rendered test results at hud.pytorch.org/pr/pytorch/executorch/16445
Note: Links to docs will display an error until the docs builds have been completed. ❌ 1 New Failure, 2 Unrelated FailuresAs of commit e870f0d with merge base 2c59f85 ( NEW FAILURE - The following job has failed:
FLAKY - The following job failed but was likely due to flakiness present on trunk:
BROKEN TRUNK - The following job failed but was present on the merge base:👉 Rebase onto the `viable/strict` branch to avoid these failures
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…for scalar value extraction" Add two `item()` methods to SlimTensor for extracting scalar values from single-element tensors: 1. **`item<T>()`** - Templated version requiring explicit type specification 2. **`item()`** - Non-templated version that auto-detects dtype and returns double Both methods: - Support all 7 slim dtypes (Float, BFloat16, Long, Int, Short, Char, Bool) - Handle CUDA tensors by automatically copying data to CPU - Validate that tensor has exactly 1 element Differential Revision: [D90034340](https://our.internmc.facebook.com/intern/diff/D90034340/) [ghstack-poisoned]
…for scalar value extraction" Add two `item()` methods to SlimTensor for extracting scalar values from single-element tensors: 1. **`item<T>()`** - Templated version requiring explicit type specification 2. **`item()`** - Non-templated version that auto-detects dtype and returns double Both methods: - Support all 7 slim dtypes (Float, BFloat16, Long, Int, Short, Char, Bool) - Handle CUDA tensors by automatically copying data to CPU - Validate that tensor has exactly 1 element Differential Revision: [D90034340](https://our.internmc.facebook.com/intern/diff/D90034340/) [ghstack-poisoned]
…for scalar value extraction" Add two `item()` methods to SlimTensor for extracting scalar values from single-element tensors: 1. **`item<T>()`** - Templated version requiring explicit type specification 2. **`item()`** - Non-templated version that auto-detects dtype and returns double Both methods: - Support all 7 slim dtypes (Float, BFloat16, Long, Int, Short, Char, Bool) - Handle CUDA tensors by automatically copying data to CPU - Validate that tensor has exactly 1 element Differential Revision: [D90034340](https://our.internmc.facebook.com/intern/diff/D90034340/) [ghstack-poisoned]
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Stack from ghstack (oldest at bottom):
Add two
item()methods to SlimTensor for extracting scalar values from single-element tensors:item<T>()- Templated version requiring explicit type specificationitem()- Non-templated version that auto-detects dtype and returns doubleBoth methods:
Differential Revision: D90034340