[texhax] Crosscompilation of TeX
Philip TAYLOR
P.Taylor at Rhul.Ac.Uk
Sat Mar 11 13:52:08 CET 2006
Uwe Lück wrote:
> At 20:37 10.03.06, Karl Berry wrote:
>
>> E.g. the ARM-processor does not contain a floating point unit.
>>
>> There is actually a long-standing (as in decades old) patch from Knuth
>> to make the TeX code use only fixed point arithmetic. I admit I am not
>> sure whether it's applied in the current distributions.
>
>
> According to the Wikipedia article on TeX, "fixed point arithmetic only"
> is an essential feature of TeX.
Never believe Wikis :-) Fixed-point arithmetic is an essential
feature of TeX only where the use of reals could affect DVI output.
If you look at TeX.web, you will see that there /are/ places where
"foo: real" is used!
@!g:real; {a glue ratio, as a floating point number}
@!glue_temp:real; {glue value before rounding}
@!cur_glue:real; ...
** Phil.
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