Dr. Dobb's is part of the Informa Tech Division of Informa PLC

This site is operated by a business or businesses owned by Informa PLC and all copyright resides with them. Informa PLC's registered office is 5 Howick Place, London SW1P 1WG. Registered in England and Wales. Number 8860726.


Channels ▼
RSS

Optimizing Pixomatic For Modern x86 Processors: Part II

By Michael Abrash, September 01, 2004

Michael discusses his greatest performance challenge ever-optimizing an x86 3D software rasterizer.
September, 2004: Optimizing Pixomatic For Modern x86 Processors: Part II

EAX Scratch register
EBX Scanline length
ECX 1/z
EDX Scratch register
ESI Pixel-buffer pixel address
EBP Span list pointer
EDI Z-buffer pixel address
ESP Stack pointer
MM0 Previous span (u0, v0)
MM1 Previous span (u1, v1)
MM2 Gouraud GB components
MM3 Gouraud AR components
MM4 Specular GB components
MM5-MM7 Scratch registers
XMM0 1/w
XMM1 u0,v0,u1,v1
XMM2 1/w2
XMM3 Left edge 1/w2
XMM4 Left edge 1/w
XMM5 Left edge u0, v0, u1, v1
XMM6-XMM7 Scratch registers

Table 2: Span generation register allocation.



Previous 1 2 3 4 5 

Related Reading

News

Commentary

Slideshow

Video

Most Popular

More Insights

White Papers

More >>

Reports

More >>

Webcasts

More >>
INFO-LINK




Currently we allow the following HTML tags in comments:

Single tags

These tags can be used alone and don't need an ending tag.

<br> Defines a single line break

<hr> Defines a horizontal line

Matching tags

These require an ending tag - e.g. <i>italic text</i>

<a> Defines an anchor

<b> Defines bold text

<big> Defines big text

<blockquote> Defines a long quotation

<caption> Defines a table caption

<cite> Defines a citation

<code> Defines computer code text

<em> Defines emphasized text

<fieldset> Defines a border around elements in a form

<h1> This is heading 1

<h2> This is heading 2

<h3> This is heading 3

<h4> This is heading 4

<h5> This is heading 5

<h6> This is heading 6

<i> Defines italic text

<p> Defines a paragraph

<pre> Defines preformatted text

<q> Defines a short quotation

<samp> Defines sample computer code text

<small> Defines small text

<span> Defines a section in a document

<s> Defines strikethrough text

<strike> Defines strikethrough text

<strong> Defines strong text

<sub> Defines subscripted text

<sup> Defines superscripted text

<u> Defines underlined text

Dr. Dobb's encourages readers to engage in spirited, healthy debate, including taking us to task. However, Dr. Dobb's moderates all comments posted to our site, and reserves the right to modify or remove any content that it determines to be derogatory, offensive, inflammatory, vulgar, irrelevant/off-topic, racist or obvious marketing or spam. Dr. Dobb's further reserves the right to disable the profile of any commenter participating in said activities.

 
Disqus Tips To upload an avatar photo, first complete your Disqus profile. | View the list of supported HTML tags you can use to style comments. | Please read our commenting policy.
 

Recent Articles

Most Popular

Stories Blogs

Upcoming Events



Most Recent Premium Content

Digital Issues