An algorithm for a fast decimal addition is proposed. The addition is performed in two steps. First, the result of addition is produced in a decimal signed-digit format. Second, the decimal signed-digit result is converted into the non-redundant form BCD. The conversion uses a borrow generating scheme based on a parallel-prefix network. Using the flexible features of the decimal signed-digit re...

There is huge amount of data generated in modern hospitals, such as medical records, lab reports and doctor notes. Health care systems employ a large number of categorization and classification systems to assist data management for a variety of tasks such as patient care, record storage and retrieval, statistical analysis, insurance and billing. One of these systems is the International Classif...

School-aged children erroneously think that 1.45 is larger 1.5 because 45 is larger than 5. Using a negative priming paradigm, we investigated whether the ability to compare the magnitude of decimal numbers in the context in which the smallest number has the greatest number of digits after the decimal point (1.45 vs. 1.5) is rooted in part on the ability to inhibit the "greater the number of di...

Computer arithmetic is predominantly performed using binary arithmetic because the hardware implementations of the operations are simpler than those for decimal computation. However, many decimal fractions cannot be represented exactly as binary fractions with a finite number of bits. The value 0.1, for example, can only be represented as an infinitely recurring binary number. If a binary appro...

Origins of decimal arithmetic • Decimal (base 10) arithmetic has been used for thousands of years • Algorism (Indo-Arabic place value system) in use since 800 AD • Many early computers were decimal Decimal computation today • Pervasive in financial, commercial, and human-centric applications – often a legal requirement • Benchmarks do not reflect actual use • 55% of numeric data in databases ar...

With the growing popularity of decimal computer arithmetic in scientific, commercial, financial and Internet-based applications, hardware realisation of decimal arithmetic algorithms is gaining more importance. Hardware decimal arithmetic units now serve as an integral part of some recently commercialised general purpose processors, where complex decimal arithmetic operations, such as multiplic...

Decimal arithmetic is desirable for high precision requirements of many financial, industrial and scientific applications. Furthermore, hardware support for decimal arithmetic has gained momentum with IEEE 7542008, which standardized decimal floating-point. This paper presents a new architecture for two operand and multi-operand signed-digit decimal addition. Signed-digit architectures are adva...