compiler: Add lowering support for 64-bit saturate operations
Fixes 7 Khronos GL CTS tests on ICL: KHR-GL45.gpu_shader_fp64.builtin.smoothstep_dvec{double, 2, 3, 4} KHR-GL45.gpu_shader_fp64.builtin.smoothstep_against_scalar_dvec{2, 3, 4}
Suggested-by: Jason Ekstrand jason@jlekstrand.net Signed-off-by: Anuj Phogat anuj.phogat@gmail.com
@mattst88 @jekstrand