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Embedded Assembly Routines into C Language Using a Floating Point Routine as an Example
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Embedded Assembly Routines into C Language Using a Floating Point Routine as an Example
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From ww1.microchip.com
With the advent of MPLAB-C, the Microchip C-compiler, many PICmicro users need to embed existing assembly language routines and/or Microchip application notes into C. This application note explains how to embed an assembly language program into MPLAB-C, version 1.10, and the issues therein. For example, embedding interrupt save and restore must be done using assembly language. Also, critical timing routines may require assembly. The 32-bit floating point multiply routine from AN575 is used to illustrate this process. The remaining 32-bit floating point math routines are embedded into individual C functions and are included in the file accompanying this application note. Keywords:
 

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Microprocessor and IC programmers, compilers and debuggers are programs that translate high-level language codes into assembly (machine) code, or track and correct errors (bugs) in program code.
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Arithmetic logic units (ALU) perform arithmetic and logic operations on binary data inputs. In some processors, the ALU is divided into two units: an arithmetic unit (AU) and a logic unit (LU).
Digital signal processors (DSPs) are specialized microprocessors designed specifically for digital signal processing, usually in real-time. DSPs can also be used to perform general-purpose computations, but are not optimized for this function.
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This application note presents an implementation of the following floating point math routines for the PICmicro microcontroller families: float to integer conversion,integer to float... (Read More)
This application note presents an implementation of the following floating point math routines for the PICmicro microcontroller families: float to integer conversion,integer to float... (Read More)
It is often necessary to output a floating point number to a display. For example, to check calculations, one might want to output floating point numbers using the PICmicro ® microcontrollers serial... (Read More)
This application note presents implementations of the following math routines for the Microchip PICmicro microcontroller family: square root function, exponential function, base 10 exponential... (Read More)
This application note presents implementations of the following math routines for the Microchip PICmicro microcontroller family: square root function, exponential function, base 10 exponential... (Read More)
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