3 ms·
It depends on the precision and accuracy and data types of the arguments and result. The 80387 was absolutely faster than software emulation for F32/64/80 by ho
by sacnoradhq 4y ago
It depends on the precision and accuracy and data types of the arguments and result. The 80387 was absolutely faster than software emulation for F32/64/80 by hooking real-mode interrupt handlers the way it was back to the 8086/8087. For I8/16, lookup tables were faster. For I32, a quality result would be very expensive. There were no GPUs in the 387 era, and there wasn't SIMD (MMX) either. In the x86 era, compilers weren't that smart. If they were, then they were slow.