when swi instruction is executed at that time it is said that pc is not updated yet so it is pointing to instruction next to swi instruction for example
addr code
0x0000 swi 1000x0004 mov r1,r20x0008 mov r2,r3
so in this code when swi instruction is being executed at that time value of PC is 0x0004 so that value will be copied to R14_SVC while going to swi handler.means value in PC in not address of instruction being executed +8 but +4 as can be seen.
but when following code is run i.e
0x0000 mov R1,R150x0004 mov r2,r10x0008 mov r4,r5
so when first instruction is being executed means value of R15 goes to R1 that is 0x0008 so how pc is updated in this case means pc pointing to instruction being executed + 8 instead of +4.
why so?
so when use mov it give +8 offset and why when use swi it gives +4 offset and resone told in manual is that while swi is being executed pc is not updated to +8 so how can pc get updated in case of mov and not in case of swi?