ARM's JavaScript instruction is actually a pretty good example of RISC philosophy. The instruction is a single cycle floating point conversion to integer using

ARM's JavaScript instruction is actually a pretty good example of RISC philosophy. The instruction is a single cycle floating point conversion to integer using x86 abi default rounding modes rather than the rounding modes in the flag register. It's a great example of the RISC filtration test of 'what's a single cycle instruction that can be noticed in instruction traces as something that will give an actual perf improvement'.