tree 4a1f37e65cfd1d8b996681f239b16016bf6d10ba
parent 7a9ea24fdf61ff7f734a5eebf65d1bba8a6b2bbb
author dan sinclair <dsinclair@chromium.org> 1679065686 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1679065686 +0000

Support float values where the zeros change the exponent

When underflow is detected in float parsing, WGSL returns `0.0`.
Currently, if the number of `0`s following a `.` shifts the exponent
from a positive to a negative we were not correctly identify the
underflow and returning 0. This CL updates the float parsing to detect
undeflow in this case and return `0.0` as expected.

Bug: tint:1863
Change-Id: I164063cebf70f825fdf2753dff8a4f016939c38e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/124341
Commit-Queue: David Neto <dneto@google.com>
Reviewed-by: David Neto <dneto@google.com>
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>