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Libraries and Floating Point Support Guide
fplib conversions between floats, doubles, and ints
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Table 16 describes routines to perform conversions between number formats, excluding long long types.
Table 16. Number format conversion routines
| Function | Argument types | Return type |
|---|---|---|
__aeabi_f2d | float | double |
__aeabi_d2f | double | float |
_fflt | int | float |
_ffltu | unsigned int | float |
_dflt | int | double |
_dfltu | unsigned int | double |
_ffix | float | int (see Notes on rounding) |
_ffix_r | float | int |
_ffixu | float | unsigned int (see Notes on rounding) |
_ffixu_r | float | unsigned int |
_dfix | double | int (see Notes on rounding) |
_dfix_r | double | int |
_dfixu | double | unsigned int (see Notes on rounding) |
_dfixu_r | double | unsigned int |
Notes on roundingRounded toward zero, independently of the current rounding
mode. This is because the C standard requires implicit conversions
to integers to round this way, so it is convenient not to have to
change the rounding mode to do so. Each function has a corresponding
function with _r on the end of its name, that
performs the same operation but rounds according to the current mode.
| Copyright © 2007-2008, 2011-2012 ARM. All rights reserved. | ARM DUI 0378D |
| Non-Confidential | ID062912 |
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