tree 394bcfad9b8e1500cd96c3e799594c664235b47a
parent 9dc41fd855998cde00a0958bf4ee07d1de78a6bb
author Chris Forbes <chrisforbes@google.com> 1567036176 -0700
committer Chris Forbes <chrisforbes@google.com> 1567038641 +0000

Clamp float values to correct range before conversion to normalized

Per Vulkan spec 2.9.2, when converting from a floating point value to
unsigned normalized, we must first clamp to [0,1]. When converting from
a floating point value to signed normalized, we must first clamp to
[-1,1]. This wasn't done to clear values.

Test: dEQP-VK.rasterization.provoking_vertex.*
Bug: b/140203285
Change-Id: I3f8c421b187b6a7e8bcb22d45142dc1664221605
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/35668
Tested-by: Chris Forbes <chrisforbes@google.com>
Presubmit-Ready: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>