Twiddling the FPU
I wrote an article for a website a friend of mine keeps. I'll warn you now: its preeeeettttyyy geeky. It had been sitting in a state of partial completion for years, but I've been in a lot of meetings lately, and so I finally got a chance to finish it :P
Its definitely in the "See how smart I am/educational" category, and not a commercially material type of thing, but, still, I think there are some nice tips there.
Embarassingly - in the course of writing the article - I discovered a long standing bug (*cough* - my bug) that I'd been blaming on the Boxely team. You can see the bug in action pretty easily in AIM Triton 1.0, AOL Explorer 1.2, AOL Safety and Security Center, and the AOL Suite Preview.
What's the bug you say?
RTFA.
And sadly, you have to get all the way to the bottom to see what it is. See? Even us Programmers can learn from Programmers :)
Its definitely in the "See how smart I am/educational" category, and not a commercially material type of thing, but, still, I think there are some nice tips there.
Embarassingly - in the course of writing the article - I discovered a long standing bug (*cough* - my bug) that I'd been blaming on the Boxely team. You can see the bug in action pretty easily in AIM Triton 1.0, AOL Explorer 1.2, AOL Safety and Security Center, and the AOL Suite Preview.
What's the bug you say?
RTFA.
And sadly, you have to get all the way to the bottom to see what it is. See? Even us Programmers can learn from Programmers :)
posted by Sree Kotay at 7:01 AM
14 Comments:
hey Sree ...'nuf on OCP...let's hear your thoughts on the combined Platform ...or are you not in a position to say anything yet? ;-)
Not to worry - I started with the OCP, because, well, that's where I started.
There will be a LOT I'll be saying about Open Services and AOL in the very near future.
But not just yet :)
And in any case, "Twiddling the FPU" wasn't an OCP post?
lol - yeah commented on the wrong post. FPU article was "fascinating" - to think that something as trivial as converting 64-bit to 16-bit numbers could have caused the Ariane-5 crash! Anyways...we all learn about IEEE specs for floating point numbers in Digital Logic 101, but I never realized casting them is so slow in compiler generated code.
Would love to read more about your 3D renderer ... how did you do hidden surface removal? I vaguely recall using BSP trees in some Graphics assignment.
3D Rendering? I used a custom HSR technique I called a "Slat buffer" - basically it was sort of like what came to be known as a hierarchical z-buffer - but per row hierarchy (i.e. "slats" instead of "tiles").
But truthfully, being fill-bound wasn't really the issue for most of the scenes I was doing: it was usually geometry bound, especially given the procedural antialiasing technique I favored.
There's a tiny bit more info here, and you can still see a (slightly munged) version in action.
I have a software rendered Quake3 renderer somewhere I should dig up and post...
wow power leveling
wow powerleveling
wow power leveling
wow gold
wow items
feelingame.com
wow tips
Most Valuable WOW Power Leveling Service
wow power leveling faq
cheap wow power leveling
wow power leveling
wow powerleveling
wow power lvl
Hi Sree Kotay, great FPU article! A few comments: I've read both the old and new versions, and I think it may need another update, as MSVC++ 8.0 has deprecated the /QIfist (Suppress _ftol) compiler option because they have "made significant improvements in float to int conversion speed." Depending on the test, your functions are sometimes much faster, but also sometimes slightly slower. I am most interested in xs_FloorToInt(), since I'm a graphics programmer. Also, a minor issue is that they have accuracy issues when dealing with numbers > 2^28 magnitude, and near integers, which makes unit testing (to ensure they actually work) rather cumbersome, but floating point inaccuracies are expected anyway, so any code using your functions should be able to deal with them. Also, in the #else clause of xs_FloorToInt(), you need to convert the result of floor() to an int. Nonetheless, it's an amazing article, with a ton of detail, and it's helped explain a lot to me. Thanks for your time in writing it, and thanks for listening! Take care,
P.S. You have no contact info in your article.
runescape money runescape gold runescape gold runescape money buy runescape gold buy runescape money runescape money runescape gold wow power leveling wow powerleveling Warcraft Power Leveling Warcraft PowerLeveling buy runescape gold buy runescape money runescape itemsrunescape accounts runescape gp dofus kamas buy dofus kamas Guild Wars Gold buy Guild Wars Gold lotro gold buy lotro gold lotro gold buy lotro gold lotro gold buy lotro gold runescape money runescape power leveling runescape money runescape gold dofus kamas cheap runescape money cheap runescape gold Hellgate Palladium Hellgate London Palladium Hellgate money Tabula Rasa gold tabula rasa money Tabula Rasa Credit Tabula Rasa Credits Hellgate gold Hellgate London gold wow power leveling wow powerleveling Warcraft PowerLeveling Warcraft Power Leveling World of Warcraft PowerLeveling World of Warcraft Power Leveling runescape power leveling runescape powerleveling eve isk eve online isk eve isk eve online isk tibia gold Fiesta Silver Fiesta Gold
runescape money runescape gold wow power leveling
棕榈树
VI设计
画册设计
血管瘤
肝血管瘤
音乐剧
福卡
防静电地板
美国留学
留学美国
电阻器
不锈钢电阻器
频敏电阻器
睡眠呼吸机
伟康呼吸机
呼吸机
无创呼吸机
家用呼吸机
呼吸机的使用
北京消化系统疾病
北京心脑血管疾病
北京肾病
北京中医儿科
北京针灸减肥
针灸减肥
北京糖尿病
北京疼痛病
北京类风湿
wow power leveling
wow power leveling
wow power leveling
wow power leveling
wow powerleveling
wow powerleveling
wow powerleveling
wow powerleveling
wow gold
wow gold
world of warcraft power leveling
world of warcraft power leveling
wow power level
wow power level
power leveling wow
power leveling wow
power leveling wow
powerleveling wow
powerleveling wow
cheap wow power leveling
Maple Story mesos
MapleStory mesos
ms mesos
mesos
SilkRoad Gold
SRO Gold
SilkRoad Online Gold
eq2 plat
eq2 gold
eq2 Platinum
EverQuest 2 Platinum
EverQuest 2 gold
EverQuest 2 plat
lotro gold
lotr gold
Lord of the Rings online Gold
Rolex Replica
Replica Rolex
hy
After preparing for many long months, Kel'Thuzad and his Cult of the Damned finally struck the first blow by releasing the plague of undeath upon Lordaeron.wow goldworld of warcraft goldwow power levelbuy wow goldwow goldworld of warcraft goldwow power levelbuy wow gold Uther and his fellow paladins investigated the infected regions in the hope of finding a way to stop the plague. Despite their efforts,wow goldworld of warcraft goldwow power levelbuy wow goldEverQuest 2 goldEverQuest 2 platbuy eq2 goldeq2 plat the plague continued to spread and threatened to tear the Alliance apart. As the ranks of the undead swept across Lordaeron, Final Fantasy XI gilffxi gilbuy cheap ffxi gilMaple Story Mesosmaplestory MesosMaple Story mesoLOTRO GoldLOTR GoldTerenas' only son, Prince Arthas, took up the fight against the Scourge. Arthas succeeded in killing Kel'Thuzad, but even so,Lord of the Rings Online GoldEverQuest 2 goldEverQuest 2 platbuy eq2 goldeq2 platFinal Fantasy XI gilffxi gilbuy cheap ffxi gil the undead ranks swelled with every soldier that fell defending the land. Frustrated and stymied by the seemingly unstoppable enemy, Maple Story Mesosmaplestory MesosMaple Story mesoLOTRO GoldLOTR GoldLord of the Rings Online GoldEverQuest 2 goldEverQuest 2 platArthas took increasingly extreme steps to conquer them. Finally Arthas' comrades warned him that he was losing his hold on his humanity. buy eq2 goldeq2 platFinal Fantasy XI gilffxi gilbuy cheap ffxi gilMaple Story Mesosmaplestory MesosMaple Story mesoArthas' fear and resolve proved to be his ultimate undoing. He tracked the plague's source to Northrend, intending to end its threat forever. LOTRO GoldLOTR GoldLord of the Rings Online GoldSilkroad goldsilkroad online goldSRO goldInstead, Prince Arthas eventually fell prey to the Lich King's tremendous power. Believing that it would save his people, Lineage 1 adenabuy Lineage 1 adenaL1 adenaLineage 2 adenabuy Lineage II adenaL2 adenadofus kamasArthas took up the cursed runeblade, Frostmourne. kamas dofuseve online iskeve iskbuy eve iskLineage 1 adenabuy Lineage 1 adenaL1 adenaLineage 2 adenaThough the sword did grant him unfathomable power, it also stole his soul and transformed him into the greatest of the Lich King's death knights.buy Lineage II adenaL2 adenadofus kamaskamas dofusLineage 1 adenabuy Lineage 1 adenaL1 adena With his soul cast aside and his sanity shattered, Arthas led the Scourge against his own kingdom. Ultimately, Arthas murdered his own father, Lineage 2 adenabuy Lineage II adenaL2 adenaeve online iskeve iskbuy eve iskKing Terenas, and crushed Lordaeron under the Lich King's iron heel. maple story mesosmaplestory mesosmaple story mesohero online goldimvu creditskal geonknight goldlast chaos goldlineage adenalineage 2 adenalord of the rings goldlotro goldwow goldwow power levelingwow powerlevelingffxi gilwow gold
sh气动马达 气动搅拌机 制袋机 手套机 收卷机 吹膜机 连线机 粉碎机 脱水机 搅拌机 造粒机 团粒机 卷绕机 拉丝机 织带机 包覆丝机 圆织机 裁料机 冲口机 下料机 压合机 纸杯机 纸碗机 纸碟机 热成型机 片材机 制杯机 牵引机 压底机 挤出机 冲压机 包装机 贴窗机 涂胶机 信封机 捆扎机 打包机 切袋机 喷码机 刻字机 打标机 标示机 缠绕机 灌装机 封箱机 丝印机 封口机 裹包机 整理机 滚齿机 封面机 包边机 折入机 整平机 冷压机 镂铣机 贴角机 贴膜机 纸巾机 湿巾机 折叠机 充填机 抛光机 装盒机 调头机 折边机 修边机 上光机 压光机 压纹机 压花机 分切机 分条机 涂布机 覆面机 裱纸机 除粉机 糊盒机 打孔机 磨刀机 切割机 钻孔机 胶水机 圆角机 压平机 划线机 纠编机 插边机 淋膜机 切片机 开槽机,V槽机 底封机 上糊机
powerleveling wow powerleveling world of warcraft power leveling 汽车空调 runescape money rs2 money wow gold 中国福利彩票 双色球 印刷机械 液压机
flexible connectors powerleveling wow powerleveling world of warcraft powerleveling briefcase 包装机械 液压机 铝型材 活塞 激光礼品 鞋业 环保空调 吹膜机 锻件
汽摩塑料配件 塑料酒瓶包装 塑料件喷漆 香炉 上海翻译公司 餐饮软件 embroidery machines runescape gold rs2 gold thermoforming machine bag making machine film coextrusion machine pvc casting film machine pvc hot shrinkable film extrusion machine
thermoforming machine thermoforming Equipment Plastic Machinery Plastic Thermoforming Machine Plastic Thermoforming Machinery Plastic Machine jordan shoes prada shoes Gucci shoes adidas shoes nike shoes ugg boots evisu jeans true religion jeans Gucci handbags lv handbags ed hardy new era
[url=http://buy-aoc-gold.rgtrcredit.com/][color=#800080][b]Age Of Conan Gold [/b][/color][/url][url=http://www.aocsale.com/][color=#800080][b]Age Of Conan Gold [/b][/color][/url][url=http://www.buy-cheap-aoc-gold.com/][color=#800080][b]Age Of Conan Gold[/b][/color][/url][url=http://www.buy-cheap-aoc-gold.com/][color=#800080][b]buy age of conan gold [/b][/color][/url]
[url=http://www.aocsale.com/][color=#800080][b]buy age of conan gold[/b][/color][/url][url=http://buy-aoc-gold.rgtrcredit.com/][color=#800080][b]buy age of conan gold [/b][/color][/url][url=http://www.buyfastgold.com/][color=#800080][b]aoc gold [/b][/color][/url][url=http://buy-aoc-gold.hellgate-pd.com/][color=#800080][b]aoc gold [/b][/color][/url][url=http://www.buyfastgold.com/][color=#800080][b]aoc gold[/b][/color][/url]
[url=http://buy-aoc-gold.hellgate-pd.com/][color=#800080][b] buy aoc gold [/b][/color][/url][url=http://www.buyfastgold.com/][color=#800080][b] buy aoc gold[/b][/color][/url]
http://www.buyfastgold.com
http://www.buy-cheap-aoc-gold.com
http://www.aocsale.com
http://buy-aoc-gold.hellgate-pd.com
http://buy-aoc-gold.rgtrcredit.com
Age Of Conan Gold Age Of Conan Gold Age Of Conan Gold buy age of conan gold buy age of conan gold buy age of conan gold aoc gold aoc gold aoc gold buy aoc gold buy aoc gold
runescape accounts
cheap runescape gold
buy runescape gp
sell runescape coin
runescape items
cheap runescape money
buy runescape gp
sell runescape coin
mabinogi gold
mabinogi money
mabinogileveling
mabinogi power leveling
mabinogi power leveling
mabinogi gold
Post a Comment
Links to this post:
Create a Link
<< Home