VM Spec

f2i

Operation
Convert float to int

f2i

Forms
f2i = 139 (0x8b)

Stack
..., value ..., result

Description
The value on the top of the operand stack must be of type float. It is popped from the operand stack and converted to an int. The result is pushed onto the operand stack:

If the value is NaN, the result of the conversion is an int 0.
Otherwise, if the value is not an infinity, it is rounded to an integer value V, rounding towards zero using IEEE 754 round-towards-zero mode. If this integer value V can be represented as an int, then the result is the int value V.
Otherwise, either the value must be too small (a negative value of large magnitude or negative infinity), and the result is the smallest representable value of type int, or the value must be too large (a positive value of large magnitude or positive infinity), and the result is the largest representable value of type int. Notes

The f2i instruction performs a narrowing primitive conversion (§2.6.3). It may lose information about the overall magnitude of value, and may also lose precision.

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Java Virtual Machine Specification (HTML generated by dkramer on February 25, 1997)
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