The MB86903 is Fujitsu's third-generation SPARC processor. It includes an on-chip floating-point unit and operates at 33 and 40 MHz. It provides an integer performance of 20 and 25 MIPS and a floating-point performance of 4 and 5 MFLOPS. The integer unit, based on Version 7 of the SPARC architecture, has a single-pulse clock input, 136 registers organized into eight windows, a 4-stage pipeline to handle data interlocks, and an optimized branch handler.
This processor is from my Sun SPARCstation IPX (4/50) 'Hobbes' from 1991.