湖南广播电视大学学报
湖南廣播電視大學學報
호남엄파전시대학학보
JOURNAL OF HUNAN RADIO AND TELEVISION UNIVERSITY
2014年
3期
79-81
,共3页
浮点数%规格化%尾数
浮點數%規格化%尾數
부점수%규격화%미수
floating point%normalization%mantissa
浮点数在本质上仍然是以定点数表现出来的,通过浮点数中的指数使数据的表示范围得到扩展。浮点运算的尾数处理包括规格化、舍入处理和溢出处理。规格化就是使尾数部分最高有效位是1。舍入处理就是按照一定的规则确定一致的位数,然后舍去某些数字后面多余的尾数。溢出就是计算结果大于寄存器或内存所能储存或表示的能力。
浮點數在本質上仍然是以定點數錶現齣來的,通過浮點數中的指數使數據的錶示範圍得到擴展。浮點運算的尾數處理包括規格化、捨入處理和溢齣處理。規格化就是使尾數部分最高有效位是1。捨入處理就是按照一定的規則確定一緻的位數,然後捨去某些數字後麵多餘的尾數。溢齣就是計算結果大于寄存器或內存所能儲存或錶示的能力。
부점수재본질상잉연시이정점수표현출래적,통과부점수중적지수사수거적표시범위득도확전。부점운산적미수처리포괄규격화、사입처리화일출처리。규격화취시사미수부분최고유효위시1。사입처리취시안조일정적규칙학정일치적위수,연후사거모사수자후면다여적미수。일출취시계산결과대우기존기혹내존소능저존혹표시적능력。
The idea of floating-point representation over intrinsically integer fixed-point numbers, which consists purely of significand, is that expanding it with the exponent component achieves greater range.The mantissa handling including normalization, rounding rules and overflow handling.The floating point will be normalized such that the most significant bit will be a one. Rounding handling aims to turn a given value into another value with a specified number of significant digits.Overflow is that occurs when a calculation produces a result that is greater than what a given register can store or represent.