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A comment on Id as Super-Ego: The Creation of Duke Nukem 3D (2001) [pdf].

Re:Id as Super-Ego: The Creation of Duke Nukem 3D (2001) [pdf] by aynsof on Friday March 10, 2017 @05:43PM (#13842806)
According to his website (bottom of the pdf), Ken Silverman's favourite optimisation is: sub eax 128, add eax -128

Can anyone explain this to an assembly rookie?

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Re:Id as Super-Ego: The Creation of Duke Nukem 3D (2001) [pdf] by jpollock on Friday March 10, 2017 @06:03PM (#13842910)
http://advsys.net/ken/add-128.htm
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Re:Id as Super-Ego: The Creation of Duke Nukem 3D (2001) [pdf] by digi_owl on Friday March 10, 2017 @06:17PM (#13842992)
Now that's attention to detail.
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