decade about graphics and performance programming that’s still relevant to Code Optimization is there too, and even my book Zen of Assembly. 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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While either case can happen, the latter case—significant performance reduction, ranging as high as 8.

Michael Abrash’s Graphics Programming Black Book, Special Edition

Actel rated it it was amazing Feb 08, LOOP, JCXZthe various accumulator-specific instructions, and even the string instructions in many circumstances no longer offer the advantages they did on the For implementation reasons, the long-period Zen timer is also incapable of timing code that starts before midnight and ends after midnight; if that eventuality occurs, the long-period Zen timer reports that it was unable to time the code because midnight was crossed.

Four college abrxsh, living in typical student housing, are frozen to the bone. I kept at it though, and about a year later I finally convinced him to come down and take a look at id.

Progarmming listings perform exactly the same number of memory accesses—2, accesses, each byte-sized, as all memory accesses must be. 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.

Prgramming first point to address in designing our program involves the appropriate text-search approach to use. The problem here is not that there are necessarily more wait states per access in highgraphics modes that varies from adapter to adapter and mode to mode. The operation of LEA is illustrated in Figure 6. The net result is that the Execution Unit burns up instruction bytes much faster than the Bus Interface Unit can fetch them, and ends up idling while waiting for instructions bytes to arrive.


This chapter is a long-time favorite of mine because it was the first—and to a large extent only—work that I know of that discussed this material, thereby introducing a generation of PC programmers to pedal-to-the-metal optimization.

Graphics Programming Black Book Special Edition by Michael Abrash

We can eliminate most calls to memcmp by performing a simple test on each potential match location that will reject most such locations right off the bat. In this pursuit, it can be useful to examine the code your compiler generates, either by viewing the code in a debugger or by having the compiler generate an assembly language output file.

Most of those programminy are straightforward; the only tricky part lies in reading the bytes and adding them together. This book is getting a little bit old and a little bit outdated.

Michael Abrash’s Graphics Programming Black Book, Special Edition

Any PC language can perform just about any function you can think of—eventually. The important point is that display memory is not very fast compared to normal system memory. In short, Listing 1. You also know now why abrasb is that you must time your code if you want to know how fast it really is.

Graphics Programming Black Book Special Edition

This book is gold PCs can work wonders. Jun 24, Justin marked it as to-read Shelves: The actually contains three timers, as shown in Figure 3. The logical approach is to get the file name, open the file, read the bytes out of the file, add them together, and print the result.


If the prefetch queue is empty at the start, the sequence could take 40 cycles. Let C do what it does well, and use assembly only when it makes a perceptible difference.

This chapter focuses almost entirely on the first popular xfamily processor, the I bought a lot. For starters, DOS functions are invoked with graphice, and interrupts are among the slowest instructions of the x86 family CPUs. This was referenced in a HN article that I read in the past day. You might think that the most obvious advantage assembly language has over C is that it allows the use of all forms of instructions and all registers in all ways, whereas C compilers tend to use a subset of registers and instructions in a limited number of ways.

The Good, theBad, and the Run-Sliced 0.

Recall that every access to a memory byte takes at least 4 cycles; that limitation is built right into the The subtle facts and examples I provide will help you gain the necessary experience, but you must continue the journey on your own. When that time comes, however, optimization can indeed make a significant difference.

Parallel Processing with the VGA 2.