arithmetic HI+PSI

[Aurelien Buhrig <aurelien.buhrig.gcc@xxxxxxxxx>]

Hi,

When I add a pointer (PSImode) with an int (HImode) (ex: sp-=cnt) ,
gcc expands the signed int by zero_extend'ing  the int and then adding
both PSI values (instead of sign extending).
How should I fix this ?
POINTERS_EXTEND_UNSIGNED is 0.

And what is the difference between ptr_mode and Pmode ?

thanks,
Aurélien