This paper proposes the design of 32-bit Binary Coded Decimal (BCD) addition and subtraction unit using reversible logic gates. The reversible 32 -bit BCD addition unit is designed using the following modules such as reversible 4-bit Carry Propagate unit using reversible logic gates such as ...
We know that 541 − 216 = 325, Thus we can say that our result of BCD Subtraction is correct. Example: – 2In this example let 0101 0001 be subtracted from 0100 1001. As per rule firstly 1’s compliment of the subtrahend is done. Then the addition is done and the result is ...
Reversible circuits are of high interest in low-power CMOS design, optical computing, nano technology, and quantum computing. In this work, we present designs of reversible Binary Coded Decimal (BCD) adder and unified reversible BCD addition/subtraction circuit. We propose three design approaches ...
We present a new method and architecture to merge efficiently IEEE 754-2008 decimal rounding with significand BCD addition and subtraction. This is a key component to improve several decimal floating-point operations such as addition, multiplication and fused multiply-add. The decimal rounding unit is...
This article proposes two new reversible logic gates, ZRQ and NC. The first gate ZRQ not only implements all Boolean functions but also can be used to design optimised adder/subtraction architectures. One of the prominent functionalities of the proposed ZRQ gate is that it can work by itself ...
The quotient is complete, and the residual dividend equals the remainder. To help illustrate the concept, the procedure is applied in the example below. This technique uses only addition, subtraction, comparisons, and shifting, making it straightforward to implement in programmable logic. Application ...
压缩型 bcd 码减法调整指令 das (decimal adjust for subtraction)指令格式:dasdas 指令对减法进行十进制调整,指令隐含寄存器操作数 al。在减法运算时,das 指令对压缩型 bcd 码进行调整,其操作为:如果(al)0fh)9或(af)=1则(al)( 12、al)-06h (af)1如果(al)9fh或(cf)=1则(al)(al)-60h(cf)1与 ...
The Atari 8-bit family of computers implemented its floating-point algorithms in BCD, which feature was facilitated by the availability of BCD addition and subtraction in the computer's 6502 microprocessor. [edit] Representational variations Various BCD implementations exist that employ other ...
⑵ 压缩型BCD码加法调整指令DAA (Decimal Adjust for Addition) 指令格式: DAA DAA指令同样不带操作数,实际上隐含寄存器操作数AL。指令的操作为: 如果((AL) and 0FH)>9 或 (AF)=1 则 (AL)←(AL)+06H (AF)←1 如果(AL)>9FH 或 (CF)=1 ...
BCD is a numerical code. Many applications require arithmetic operations. Addition is the most important of theses because the other operation, namely subtraction, multiplication and division, can be done using addition. The rule for addition of two binary coded decimal (BCD) numbers is given below...