Arm_ How to press the stack

(1) Additional questions
Write assembler to add 8 times R4~r11, R4~r11 start value is 1~8, after each false operation put R4~R11 content into SP Stack, SP's initial set to 0x800.
(2) Problem analysis
First, the RI is added by adding to the add value.
The data is then pressed into the stack by Stmia, with a count record of the number of operations, the loop ending compares whether count is 0, the exit is satisfied, or the sum assignment is repeated.
(3) design scheme (algorithm idea description or drawing flowchart)
1. R4~r11 the eight values into the stack after doing a cumulative assignment
2. Counter R0 minus One
3. Compare if R0 is 0, if exit, otherwise repeat
(4) Assembly realization: