These samples illustrate a few tricks about how to avoid
conditional jumps with help of logical instructions.


   a:=abs(a)

   CDQ
   XOR EAX,EDX
   SUB EAX,EDX


   if (b < a) a:=b

   SUB EBX,EAX
   SBB ECX,ECX
   AND ECX,EBX
   ADD EAX,ECX


   if (a < b) a:=b

   SUB EBX,EAX
   SBB ECX,ECX
   NOT ECX
   AND ECX,EBX
   ADD EAX,ECX


   if (a!=0) a:=b  else a:=c

   CMP EAX,1
   SBB EAX,EAX      0  | FFFF
   XOR ECX,EBX      cx=cx xor bx
   AND EAX,ECX      0  | cx xor bx
   XOR EAX,EBX      bx | cx xor bx xor bx


   if (carry) a:=b  else a:=a
   condition
   SBB ECX,ECX
   SUB EBX,EAX
   AND ECX,EAX
   ADD EAX,ECX


   if (carry) a:=a+b  else a:=a
   condition
   SBB ECX,ECX
   AND ECX,EBX
   ADD EAX,ECX