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Libraries and Floating Point Support Guide
Conventions and feedback 
The ARM C and C++ libraries The ARM C micro-library 
Floating-point support About floating-point support The software floating-point library, fplib Calling fplib routines fplib arithmetic on numbers in a particular format fplib conversions between floats, doubles, and int fplib conversion between long longs, floats, and d fplib comparisons between floats and doubles fplib C99 functions Controlling the ARM floating-point environment Floating-point functions for compatibility with Mi C99-compatible functions for controlling the ARM f C99 rounding mode and floating-point exception mac Exception flag handling Functions for handling rounding modes Functions for saving and restoring the whole float Functions for temporarily disabling exceptions ARM floating-point compiler extensions to the C99 Writing a custom exception trap handler Example of a custom exception handler Exception trap handling by signals Using C99 signalling NaNs provided by mathlib (_WA mathlib double and single-precision floating-point Nonstandard functions in mathlib IEEE 754 arithmetic Basic data types for IEEE 754 arithmetic Single precision data type for IEEE 754 arithmetic Double precision data type for IEEE 754 arithmetic Sample single precision floating-point values for Sample double precision floating-point values for IEEE 754 arithmetic and rounding Exceptions arising from IEEE 754 floating-point ar Ignoring exceptions from IEEE 754 floating-point a Trapping exceptions from IEEE 754 floating-point a Exception types recognized by the ARM floating-poi Using the Vector Floating-Point (VFP) support librFloating-point support
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The following topics describe the ARM support for floating-point computations:
Floating-point functions for compatibility with Microsoft products
C99-compatible functions for controlling the ARM floating-point environment
Functions for saving and restoring the whole floating-point environment
mathlib double and single-precision floating-point functions
Sample single precision floating-point values for IEEE 754 arithmetic
Sample double precision floating-point values for IEEE 754 arithmetic
Ignoring exceptions from IEEE 754 floating-point arithmetic operations
Trapping exceptions from IEEE 754 floating-point arithmetic operations
Exception types recognized by the ARM floating-point environment
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