%0 Journal Article
%T An Asynchronous IEEE Floating-Point Arithmetic Unit
%A Joel R. Noche
%A Jose C. Araneta
%J Science Diliman
%D 2007
%I University of the Philippines
%X An asynchronous floating-point arithmetic unit is designed and tested at the transistor level usingCadence software. It uses CMOS (complementary metal oxide semiconductor) and DCVS (differentialcascode voltage switch) logic in a 0.35 ¦Ìm process using a 3.3 V supply voltage, with dual-rail data andsingle-rail control signals using four-phase handshaking.Using 17,085 transistors, the unit handles single-precision (32-bit) addition/subtraction, multiplication,division, and remainder using the IEEE 754-1985 Standard for Binary Floating-Point Arithmetic, withrounding and other operations to be handled by separate hardware or software. Division and remainderare done using a restoring subtractive algorithm; multiplication uses an additive algorithm. Exceptionsare noted by flags (and not trap handlers) and the output is in single-precision.Previous work on asynchronous floating-point arithmetic units have mostly focused on single operationssuch as division. This is the first work to the authors' knowledge that can perform floating-point addition,multiplication, division, and remainder using a common datapath.
%K Asynchronous logic circuits
%K floating point arithmetic
%K calculation times
%U http://journals.upd.edu.ph/index.php/sciencediliman/article/view/711