tree 565861f573423dd3f36f761bc08021affc2f3de8
parent 856d6af57ea6d854f03de6ca5aa08fcd2296acf7
author Zhaoming Jiang <zhaoming.jiang@intel.com> 1654885115 +0000
committer Dawn LUCI CQ <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com> 1654885115 +0000

tint: f16 literal in WGSL lexer and check subnormal f32/f16 hex literal

This patch
1. Add F16 literal support in WGSL lexer and parser for both decimal and
hex form. Also fix the f16::Quantize method to deal with subnormal cases
correctly.
2. Fix exactly-representable check for hex f32 literal to deal with
subnormal cases.
3. Implement and fix related unitests for f16 and f32.

Bug: tint:1473, tint:1502
Change-Id: Ia4a7c9144ef9323fb23b2200a64e1ca8afb6c334
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/93100
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Zhaoming Jiang <zhaoming.jiang@intel.com>
Commit-Queue: David Neto <dneto@google.com>