In LLVM3, this conversion was subtly broken. We're now on LLVM7, where this should be fixed. Mostly a revert of https://swiftshader-review.googlesource.com/c/SwiftShader/+/7354, but also includes a subzero implementation Bug: b/31816482 Change-Id: I154a221b44b985a35bcc5e15923a0deb9b51c711 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/39148Tested-by: Chris Forbes <chrisforbes@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>
