Mastering Assembly Programming

Calculation loop

Once all the preparations are done, the calculation loop in which we generate our forecast is fairly simple. First of all we increment the number of days value, which has a dual purpose--during the first iteration, it solves the problem of the day of birth not being included and advances the current date one day during the remaining iterations.

The second instruction copies the XMM4 register to XMM0, which will be used for most of our calculations, and multiplies it with the number of days in XMM2 by the execution of the third instruction--which actually calculates the (2*PI*t) part of the formula.

The fourth instruction completes the calculation of the value we need the sine of, by division of XMM0 by lengths of biorhythmic ...