Zhaoming Jiang 62bfd318ae tint: Implement `f16` keyword in Tint frontend ... This patch: 1. Add the `f16` WGSL extension. 2. Add `f16` as keyword, and remove it from reserved word list. 3. Add ast::f16 and sem::f16, and implement validation that using `f16` type must be with `f16` extension enabled. 4. Add `Number<NumberKindF16>` for f16 literal and constant, and add `ast::FloatLiteralExpression::Suffix::kH`. 5. Add placeholder in all writer which report error when try to emit f16 type. Bugs: tint:1473, tint:1502 Change-Id: Ifb363beeb2699ed7cac57e07227d1b2cfa8050b4 Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/89922 Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro: Kokoro <noreply+kokoro@google.com> Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>		2022-05-13 12:01:11 +00:00
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tint	tint: Implement `f16` keyword in Tint frontend	2022-05-13 12:01:11 +00:00
OWNERS	Add top-level OWNERS and scope Tint owners more tightly.	2022-04-07 17:59:14 +00:00