search for: byte&word

Displaying 1 result from an estimated 1 matches for "byte&word".

2013 Nov 21
1
[LLVMdev] Modelling M68k registers?
...t named but denoted by the size of the operation. Compare these two: 16bit mem to reg: "mov ax, [ebx] -> move.w (a0), d1" 32bit mem to reg: "mov eax, [ebx] -> move.l (a0), d1" This makes me think that maybe subregs is not what I should use, but instead treat it as the byte&word load and store in ARM? Or maybe I should treat data and address registers differently since writing to the 'subregs' of a data reg to not change the upper bits, whereas with address registers all 32bits are signed extended, as in: move.l #$12345678, d0 move.w #$fedc, d0 ; d...