Fix saturating casts in simd_op_check
Fix saturating casts in simd_op_check


Former-commit-id: f66c03a9935b3802d3aef2eed33062ffa407169c
darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide