NASM allows use of "LEA" expressions that exceed 32-bits and silently wraps
them for you. YASM gives an error and refuses to compile when this is done.
In NASM, this works but YASM this fails with "invalid effective address":
%define P 0xB7E15163
%define Q 0x9E3779B9
lea eax,[eax+P+Q]
Normally YASM seems to try to give a warning for many other types of
instructions (mov, add, sub, ...). For example, in NASM this compiles without
warning, but YASM kindly prints out "warning: value does not fit in 32 bit
field" which is good.
%define P 0xB7E15163
%define Q 0x9E3779B9
add eax,P+Q
YASM should be consistent and allow the LEA with large constants, but give a
warning if it wants to.
