[llvm] [SPIR-V] Implement SPV_KHR_float_controls2 (PR #146941)

[Steven Perron via llvm-commits]

s-perron wrote:

@Keenuts I on vacation for a while. You seem to have addressed his comment. You do not have to wait for him to merge.

https://github.com/llvm/llvm-project/pull/146941