Difference between thumb machine directives

Hi Experts, What is the key difference between the following directives .thumb .thumb_func .force_thumb .thumb_set What is the exact use case where the above things can to be applied ? Regards, Techguyz...
Why does ARM Branch with Link (BL) instruction considers prefetch?

Hi, When I read the words below dot line, I don't understand why "R14 is adjusted to allow for the prefetch" Could you explain it to me? Thanks, ....... Branch with Link (BL) writes the old PC into the...
Question about a code snippet on ARM, Thumb state change

Hi, I find the following code snippet online on ARM state change. Although that whole material looks solid, the second line in the blue code below is puzzling. add R1,PC,#1 ;Load address of SUB_BRANCH...
Could you explain this assembly line to me?

Hi, I am learning ARM assembly code. The following is a Thumb disassembly from a short .c file: int main() { printf("Hardware test, finish testing.\n"); return 0; } 00000000 <main>: 0:...