m68k: testing shift result

[Alex]

   Hi,

   If I compile the following code for coldfire:

int foo(int a)
{
  if(a >> 3)
    return 10;
  else
    return 100;
}

the output with -O2 or -O3 optimization is:

00000000 <foo>:
   0:   4e56 0000       linkw %fp,#0
   4:   202e 0008       movel %fp@(8),%d0
   8:   e680            asrl #3,%d0
   a:   4a80            tstl %d0
   c:   6608            bnes 16 <foo+0x16>
   e:   4e5e            unlk %fp
  10:   103c 0064       moveb #100,%d0
  14:   4e75            rts
  16:   4e5e            unlk %fp
  18:   700a            moveq #10,%d0
  1a:   4e75            rts

In Coldfire RM it says that zero flag is set by asrl if the result is 0, 
so "tstl %d0" is not necessary, right ?

In 68020 the result is the same, but I could not find the 680x0 RM manual.

thank you,
Alex Prado