According to the Zimbabwe Independent:
AMENDMENTS to the Electoral Act by President Robert Mugabe using Statutory Instrument 85 of 2013 shows the party-list system of proportional representation will be used in allocation of seats in the senate, national assembly and provincial councils…
Mugabe invoked the Presidential Powers (Temporary Measures) Act to make sweeping changes to the Electoral Act two weeks ago despite that parliament was still sitting.
The article goes on to explain the system, though not necessarily clearly. It seems that the FPTP system remains the basis of the upcoming elections, and that the list seats are additional. They might only be newly reserved seats for women, but I don’t find the article clear on these points.