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Build engine port backed by GZDoom tech. Currently supports Duke Nukem 3D, Blood, Shadow Warrior, Redneck Rampage and Powerslave/Exhumed.
792ac2fdf0
Affected functions: hlineasm4, vlineasm1, mvlineasm1, tvlineasm1.
Optimizations:
- declare all used variables as possibly const-qualified locals in each
function. This removes unnecessary loads from memory in the loops.
- rewrite "for (; cnt>=0; cnt--) {...}" to "cnt++; do {...} while (--cnt);"
in the three last ones (yes, these function iterate cnt+1 times). This
makes them functionally equivalent to the asm versions (madness ensues for
cnt < 0) and allows the compiler to remove one 'test' instruction at the
end of each loop.
- in the translucence function, replace addition by ORing
Observations (system: Core2 Duo Linux x86_64):
With a 1680x1050 window fully covered by the respective type of wall (simple,
masked, trans. masked), fps increases by 3-4 from the baseline of approx. 60.
git-svn-id: https://svn.eduke32.com/eduke32@2405 1a8010ca-5511-0410-912e-c29ae57300e0
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