Справочник Пользователя для AMD 250

25112

Rev. 3.06

September 2005

Replace integer division with multiplication when there are multiple divisions in an expression. (This 
is possible only if no overflow will occur during the computation of the product. The possibility of an 
overflow can be determined by considering the possible ranges of the divisors.)

This optimization applies to:

•

32-bit software

•

64-bit software

Integer division is the slowest of all integer arithmetic operations.

Avoid code that uses two integer divisions:

int i, j, k, m;

m = i / j / k;

Instead, replace one of the integer divisions with the appropriate multiplication:

m = i / (j * k);