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Decode a float into integers #10803

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@vmx vmx commented Dec 4, 2013

The integer_decode() function decodes a float (f32/f64)
into integers containing the mantissa, exponent and sign.

It's needed for rationalize() implementation of #9838.

The code got ported from ABCL [1].

[1] http://abcl.org/trac/browser/trunk/abcl/src/org/armedbear/lisp/FloatFunctions.java?rev=14465#L94

I got the permission to use this code for Rust from Peter Graves (the ABCL copyright holder) . If there's any further IP clearance needed, let me know.

The `integer_decode()` function decodes a float (f32/f64)
into integers containing the mantissa, exponent and sign.

It's needed for `rationalize()` implementation of rust-lang#9838.

The code got ported from ABCL [1].

[1] http://abcl.org/trac/browser/trunk/abcl/src/org/armedbear/lisp/FloatFunctions.java?rev=14465#L94
bors added a commit that referenced this pull request Dec 5, 2013
The `integer_decode()` function decodes a float (f32/f64)
into integers containing the mantissa, exponent and sign.

It's needed for `rationalize()` implementation of #9838.

The code got ported from ABCL [1].

[1] http://abcl.org/trac/browser/trunk/abcl/src/org/armedbear/lisp/FloatFunctions.java?rev=14465#L94

I got the permission to use this code for Rust from Peter Graves (the ABCL copyright holder) . If there's any further IP clearance needed, let me know.
@bors bors closed this Dec 5, 2013
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