ARM Instruction Set - Branching Instructions - B, BL,BX,BLX

[@kervinsingh6213]

Time stamps: (for those with basic programming background, if not watch from start)
6:00 Different Branch instruction types and what each of them does
16:00 List of all Branch instruction names
16:56 Examples using branch instructions
21:37 BX and BLX instructions (change processor mode from arm to thumb)
29:35 Examples
34:09 ARM-THUMB interworking
Good video. you explain branch better than my school.Have a great day. :D

[@VishalGaikwad]

Thanks kelvin

[@poojarajashekar]

Amazing explanation. I had no idea about arm, and everything was explained so clear with basics which made me understand so well. Thank u so much

[@VishalGaikwad]

Thanks pooja

[@Sagetheband]

A very easy to understand lecture. Thank you!

[@ziyaatayazc1312]

That was clear and easy to understand tutorial for the beginners. Thank you!

[@VishalGaikwad]

Thank you

[@bhavanavavilala5953]

Clear explanation.... Really helped me to get through my xam✌️

[@VishalGaikwad]

Glad to hear that

[@zetaconvex1987]

Worth emphasising is that BLX and BX use absolute addresses, whilst the others use relative addresses.

[@R0se_ix1b]

Very helpful video today I explained this example to my students

[@VishalGaikwad]

That's great

[@adarshkv4616]

Excellent Explaination Sir👏👏👏

[@aneeshchowdary1893]

Great video and an amazing explanation.

[@mamthas7734]

Sir, your videos are very useful for us...Easy to understood...please upload break point,MSR,MRS,CLZ instructions

[@VishalGaikwad]

Thank you.! I am explaining MRS instruction here,
MRS - Move to Register from Special Register
Special register means CPSR. Register means any general purpose register(like R0,R1 etc),
MRS R0,CPSR ; Take a copy of the CPSR.
As MRS means "Move to Register from Special Register" in the above instruction CPSR register cotents will be moved to R0 register.
Now similatly you can try to understand the remainig instructions, refer below mentioned links for the same,
www.keil.com/support/man/docs/armasm/armasm_dom1361289881054.htm
www.keil.com/support/man/docs/armasm/armasm_dom1361289881714.htm
developer.arm.com/docs/100076/0200/a32t32-instruction-set-reference/a32-and-t32-instructions/clz
infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0204g/Bcfbdihi.html
Hope this will help you.

[@mes7063]

Sir does it mean R14 will hold where BL IS present and r15 / pc will execute subroutine. Once done to again call it to main we do r15=14

[@snehalj4115]

So concise and engaging, THANK YOU😃

[@VishalGaikwad]

Thank you

[@linhinNTU]

why in 30:49, r0=tcode+1, then it will jump to address of tcode? i thought to jump to address of tcode, then in ARM only have: LDR ro, =tcode. Not tcode+1? why +1?

[@likhithshetty2715]

Thankyou Sir ,Best Explaination ever!!!!

[@malefetsanelenka8013]

How does BX and BLX change instruction set while cortex M processors work only with thumb instruction set?

[@fatimah4427]

Great super informative

[@VishalGaikwad]

🙏

[@sandhyakorada7852]

Lengthy but understandable

[@motivationalcomred]

streak 8/14

[@wm0zart]

At th-cam.com/video/su6AJEK5bJU/w-d-xo.html , you write:
if (r2 != 10) r5 = r5 +10 - r3
Considering the code which you present, I think this is incorrect,.
If r2 equals 10, "CMP r2, #10" will set the
Z condition flag, because r2 and #10
are the same. As a consequence the instruction
"BEQ SKIP" will cause the program to jump to
SKIP.
If r2 holds some other value, the Z condition flag
will not be set and BEQ will not cause a jump.
Consequently the "ADDNE r5,r5,r2" will increase r5
with the value of r2 and then subtract r3 from r5.
I think the formula would need to look like:
if (r2 != 10) r5 = r5 + r2 - r3
If r2 equals 10, then r5 will remain unaffected.