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.
Programming is not a zero-sum game. Scaled and three-dimensional graphics, which spend a great deal of time performing calculations often using very slow floating-point arithmetictend to suffer less. ZTimerReport first checks to see whether the timer overflowed counted down to 0 and turned over before ZTimerOff was called; if overflow did occur, ZTimerOff prints a message to that effect and returns.
As shown in Table 1.
I was a little worried I would need to be a guru to make any sense of this book. A second approach is modification of ZTimerReport to place the result at some safe location in memory, such as an unused portion of the BIOS data area.
Understand where the time really goes when your code runs. Please be aware that the inaccuracy that the Zen timer can introduce into the system clock time does not affect the accuracy of the performance measurements reported by the Zen timer itself.
Michael Abrash’s Graphics Programming Black Book, Special Edition
One-tenth of a second! This chapter has presented a quick step-by-step overview of the design process.
Credit for this final approach goes to Michael Geary, and thanks go to David Miller for passing the idea on to me. Like readgetc calls DOS to read from the file; the speed improvement of Listing 1. In other words, the inherent nature of this application limits bpack performance improvement that can be obtained via assembly. I have the Black Book as well, good memories!
To upload an avatar photo, first complete your Disqus profile. As a result, code timed with the Zen timer should not expect any hardware interrupts to occur during the interval between any call to ZTimerOn and the corresponding call to ZTimerOffand should not enable interrupts during that time.
Someone balck out and buys a gas heater, and at considerable risk to life and limb hooks it up to an abandoned but still live gas pipe that once fed a stove on the third floor. Assemblers perform no transformation from source code to machine language; instead, they merely map assembler instructions to machine language instructions on a one-to-one basis. That abrasy, with a word-sized memory access, such as. Here’s the original DDJ link: That means that it can never execute in less than 24 cycles even if the 4-byte prefetch queue is full when it starts, since 6 instruction bytes would still remain to be fetched, at 4 cycles per fetch.
Graphics Programming Black Book Special Edition by Michael Abrash
On the other hand, the potential of assembly code is much greater than that of other languages, as well. Interesting, yes; essential, no. There are a couple of interesting aspects to the last example.
In other words, one instruction admittedly, an instruction that does a great deal can take over one-tenth of a second longer on an than on ansimply because of the 8-bit bus. Eric rated it it was amazing Apr 06, Knowledge and wisdom for the aspiring developer.
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This page will not. Knowing that Jeff Duntemann is an aficionado of such esoterica who do you know who owns an album by The Peppermint Trolley Company? X or the Rational DOS Extender, ahrash example because segment loads in protected mode take a minimum of 17 cycles, versus a mere 2 cycles in real mode. Byte-by-byte processing is easy to program but can be extremely slow, bkack to the vast overhead that results from invoking DOS each time a byte must be processed.
Rebooting boo, clear up any timer-related problems of the sort described above. By the way, there is, to the best of my knowledge, no such problem with MASM up through version 5. The objective not always attained in creating high-performance software is to make the software able to carry out its appointed tasks so rapidly that it responds instantaneously, as far as the user is concerned.
The long-period Zen timer has exactly the same calling interface as the precision Zen timer, and can be used in place of the precision Zen timer simply by linking it to the code to be timed in place of linking the precision timer code. The Zen timer can be used to measure code performance when programming in C—but not right out of the box.
After all, every other arithmetic and logical blak sets the flags; why not Blxck The long-period timer—Listing 3.
Graphics Programming Black Book Special Edition
Amazon Renewed Refurbished products with a warranty. The sword cuts both ways, and good assembly code requires more, not less, forethought and planning than good code abrazh in a high-level language. You should experiment freely, but always remember that actual, measured performance is the bottom line.
Likewise, proper algorithm selection and good design are fundamental to performance.