Comparison of implementations of real arithmetic in ELLA and VHDL

A comparison is made between the newly available `numerics´ features of ELLA Version 4 and equivalent facilities in VHDL. The comparison is made for two particular functions, an infinite impulse response filter and an implementation of an IEEE 454 standard 32 bit arithmetic multiplier. While these designs can be readily expressed in both ELLA and VHDL, only ELLA provides a direct migration path from behaviour to structure. This is claimed to be a considerable research achievement, with attractive development prospects for synthesis and formal verification