Michael Abrash’s Graphics Programming Black Book (Special Edition) [Michael Abrash] on *FREE* shipping on qualifying offers. No one has done . Graphics Programming Black Book Special Edition has 65 ratings and 3 reviews. — Includes everything that master Abrash has ever written about optimizati. Michael Abrash’s classic Graphics Programming Black Book is a compilation of Michael’s writings on assembly language and graphics.
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Graphics Programming Black Book
In fact, the Zen timer shown in Listing 3. As a result, you should follow the rules bok thumb described here—and then time your code to see how fast it really is.
Whichever perspective you prefer is fine. When the best code—the fastest or smallest code possible—is needed, though, assembly is the only way to go. When programming the PC, however, the prefetch queue cycle-eater would make such careful code synchronization a difficult task lback, and any modest performance improvement that did result could never justify the increase in programming complexity and the limits on creative programming that such an approach would entail.
Some of those tricks became the basis for the Commander Keen series of games, which launched id Software. John Carmack, id Software. I checked out reviews and it seems like it’s a bit dated. Had I known I abradh seated next to a real, live science-fiction writer—an award-nominated writer, by God! A third approach is alteration of ZTimerReport to print the result over a serial port to a terminal or to another PC acting as a terminal. What makes this write-up particularly special is that this was aabrash only man to truly worked as an equal with John Carmack on Quake’s revolutionary 3d, fluid abrasj engine on and he’s giving the whole development story away for almost free.
A programmer examines the requirements of an application, designs a solution at some level of abstraction, and then makes that design come alive in a code implementation.
Reports State of Cloud A full understanding of code optimization requires an understanding of cycle-eaters and their implications.
It should be clear that we must somehow avoid invoking DOS for every byte in the file, and that means reading more than one byte at a time, then buffering the data and parceling it out for examination one byte at a time. Chris rated it it was amazing Mar 09, The time-of-day count measures the passage of You should not use the long-period Zen timer to time barash that requires interrupts to be disabled for more than 54 ms at a stretch during the timing interval, since when interrupts are disabled the long-period Zen timer is subject to the same 54 ms maximum measurement time as the precision Zen timer.
David did all his coding in Pascal, pointing out that while an assembly language version would probably be faster, his Pascal utility worked properly and was fast enough for him. One-tenth of a second!
If you look at Doom, there wasn’t a lot of assembler even hlack in the early ‘s. Because it allows INC to function as a data pointer manipulation instruction for multi-word arithmetic. Altering the Zen timer for linking to a small code model C program involves the following steps: The hack was that he started an fpu divide and then got useful work done on the integer pipeline without a stall, perfectly timing out when the fpu would have his value ready.
A long-period Zen timer for use in such cases will be presented later in this chapter. Who on Nov 2, Otherwise, ZTimerReport subtracts the reference count representing the overhead of the Zen timer from the count measured between the calls to ZTimerOn and ZTimerOffconverts the result from timer counts to microseconds, and prints the resulting time in microseconds to the standard output. He was a good student, and was planning to be an engineer.
When it comes to blak states, the CPU is passive, merely accepting whatever wait states the accessed device chooses to insert during the course of the access.
In other words, the inherent nature of this application limits the performance glack that can be obtained via assembly. When we discovered the 8-bit bus nook, we learned to use byte-sized memory operands whenever possible, and to keep word-sized variables in registers.
Assembly language optimization is the final and far from the only step in the optimization chain, and as such should be performed last; converting to assembly too soon can lock in your code before the design is optimal. This is just slightly longer than the time per load of AL measured by the precision Zen timer, as we would expect given that interrupts are left enabled by the boack Zen timer. The two approaches are functionally interchangeable but not bpok from a performance standpoint, and which is better depends on the particular context.
Michael Abrash’s Graphics Programming Black Book Special Edition: Table of Contents
Justin Alexander rated it it was amazing Jan 29, Both instructions are 2 bytes long, and in both cases it is the 8-cycle instruction fetch time, not the 3 or 4-cycle Execution Unit execution time, that limits performance. Learn more about Amazon Prime. It matters a great deal which master is more important, for while both the CPU and the video circuitry must gain access to display memory, only one of the two masters can read or write display memory at any one time.
A bit of background: Fast Convex Polygons 4. No one has done more to conquer the performance limitations of the PC than Michael Abrash, a software engineer for Microsoft.