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Floating-point Support

5.2.2 Conversions between floats, doubles, and ints

The routines in Table 5-2 perform conversions between number formats, excluding

long

Table 5-2 Number format conversion routines

Function Argument type Result type

_f2d float double

_d2f double float

_fflt int float

_ffltu unsigned int float

_dflt int double

_dfltu unsigned int double

_ffix float

int

a. Rounded 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

on the end of its name, that performs the same operation but rounds according to the current

mode.

_ffix_r float int

_ffixu float

unsigned int

_ffixu_r float unsigned int

_dfix double

int

_dfix_r double int

_dfixu double

unsigned int

_dfixu_r double unsigned int

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