There are half a million x86 microarchitectures. You can look up a particular microarchitecture in Agner Fog’s instruction tables (link below). There will be bo

There are half a million x86 microarchitectures. You can look up a particular microarchitecture in Agner Fog’s instruction tables (link below). There will be both throughput and latency values for different instructions (or something else, depending on microarchitecture). Keep in mind that x86 has both x87 and SSE floating-point, it sounds like what you want is the single precision, non-vectorized SSE instructions (like ADDSS). Also note that most microarchitectures are superscalar and may have multiple units capable of executing the instruction you are looking at. https://www.agner.org/optimize/instruction_tables.pdf https://www.agner.org/optimize/instruction_tables.pdf