Author: Tony Werten
Date: 23:10:02 04/09/03
Go up one level in this thread
On April 10, 2003 at 02:08:36, Tony Werten wrote: >On April 09, 2003 at 11:11:01, Uri Blass wrote: > >>Supppose file1 and file2 are numbers between 0 and 7. >> >>Am I correct to assume that in general it is better to not to use >> >>int A[8]; >>If (file1<=file2) x+=A[file2-file1]; > >Most modern compilers will do better with: > >bonus=0; >if (file1>file2) bonus=A[file2-file1]; Oops, (file2>file1) >x+=bonus; > >The 2nd line basicly forces the compiler to use a CMOV. It might also work with >less forcing, but this way you are sure. > >Tony > >> >> >>but instead of it something like >> >>int PADDED_A[15]; >>int * const A = PADDED_A+7; >>x+=A[file2-file1]; >> >>\\A[x]=0 for x=-1,x=-2,...x=-7 >> >> >>Uri
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