double floating data 中文意思是什麼
double floating data
解釋
雙倍字長浮點資料-
Double a double - precision floating point number data type
雙精度浮點數數據類型。 -
Double is the most efficient data type, because the processors on current platforms perform floating - point operations in double precision
是最有效的數據類型,因為當前平臺上的處理器以雙精度形式執行浮點運算。 -
No conversions are performed ; therefore, the data retrieved must already be a double precision floating point number or an exception is generated
不執行任何轉換,因此所檢索的數據必須已經是雙精度浮點數,否則會生成異常。 -
Double is the most efficient of the fractional data types, because the processors on current platforms perform floating - point operations in double precision
是小數數據類型中效率最高的,因為目前各平臺的處理器都是以雙精度來進行浮點運算。 -
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) 。 -
Since the address returned by a created word is not necessarily aligned for any particular class of floating - point data, a program shall align the address ( to be float aligned, single - float aligned, or double - float aligned ) before accessing floating - point data at the address
由於一個create出的詞傳回位址不必對齊任何特別的種類或浮點資料,一個程式必須在存取在位址上的浮點資料前將位址對齊(要浮點對齊,單浮點對齊或雙浮點對齊)
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