qcmadness

Floating Point Unit

專計浮點數架

qcmadness

引用:

Originally posted by 真．飛鳥 at 2006-3-9 20:22:

浮點數有乜用

當整數 (1,2,3,4,5) 不能表示一個數時,
電腦就會用浮點數 (1.032 x 10^2) 來計......

qcmadness

引用:

Originally posted by 真．飛鳥 at 2006-3-10 13:24:

哦 ...
好似好少機會用 ...

除左office果d之外, 好多都要用FPU

Cornoe之前, AMD既FPU係高一等既

qcmadness

引用:

Originally posted by trentcys at 2006-3-11 22:34:
Can\'t believe they are using onchip x87 as a feature....

我諗唔係x87果d

而家駛鬼x87

qcmadness

引用:

Originally posted by trentcys at 2006-3-12 18:50:
係雞肋lor
好似x86咁...行內人點會唔知x86無論HW/SW都難設計. 不過邊個敢放棄

Market-Driven

qcmadness

引用:

Originally posted by 真．飛鳥 at 2006-3-12 18:53:

x87 又乜野來

http://en.wikipedia.org/wiki/X87

qcmadness

引用:

Originally posted by 真．飛鳥 at 2008-2-23 14:16:

你兩年之後先來答番我

原來果陣時我睇唔到你問

x87咪係用來計FP instruction的co-processor (e.g. 386DX + 387)
486DX開始入埋CPU入面, 一直到而家

不過而家用來計FP既, 多數用SSEx