AN575 - Microchip Technology

AN575 IEEE 754 Compliant Floating-Point Routines

www.DataSheet.co.kr IEEE 754 Compliant Floating-Point Routines AN575 IEEE 754 Compliant Floating-Point Routines Author: Frank Testa INTRODUCTION This application note presents an implementation of the following floating point math routines for the PIC16/17 microcontroller family: INTxx( A ) float to integer conversion FLOxx( A ) NRMxx( A ) FPAxx( A , B ) F.

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PIC16/17 families are provided in a modified IEEE754 32 bit format together with versions in 24-bit truncated format. 5 FLOATING POINT ARITHMETIC Although fixed point arithmetic can usually be employed in many numerical problems through the use of proper scaling techniques, this approach can become complicated and sometimes result in less efficient code than is possible using floating point methods[1]. Floating point arithmetic is essentially equivalent to arithmetic in scientific notation relative to a particular base or radix. In the special case of base two or binary arithmetic, a number .