double-precision exponent 中文意思是什麼
double-precision exponent
解釋
雙精度指數-
To modify the fp control word, then the run - time startup code will set the x87 fpu control word precision - control field to 53 - bits, so all float and double operations within an expression will occur with 53 - bit significand and 15 - bit exponent
修改fp控制字,則運行庫啟動代碼會將x87 fpu控制字精度控制欄位設置為53位,這樣,表達式內的所有浮點運算和雙精度運算都以53位有效數和15位指數進行。 -
All sse single - precision operations will, however, use a 24 - bit significand 8 - bit exponent, and sse2 double - precision operations will use a 53 - bit significand 11 - bit exponent
但是,所有sse單精度運算都將使用24位有效數/ 8位指數,而sse2雙精度運算將使用53位有效數/ 11位指數。 -
While floating - point data is stored in the fprs in double - precision format, a set of single - precision arithmetic instructions perform the arithmetic operation and round the final result to single - precision while detecting exceptions such as exponent overflow, underflow, and inexact that should occur with a single - precision operation
雖然浮點數以雙精度格式存儲于fpr中,但是,有一組單精度運算指令,可以執行運算操作並將最終結果舍入為單精度,同時檢測進行單精度操作時可能會發生的異常(比如指數溢出、下溢和失去精度) 。
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