This was just calling the wrong function.
Looks like a copy and paste bug.

Change-Id: Icde43940f17f467f7602b7a2ce0e5ac1e517c769
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/26208Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>