intapply_gaussian:
    push {r4-r10, fp, lr}
    add fp, sp, #32
    // sub SP, SP, #4
    mov r4, #0 //i
    mov r7, r0
    mov r8, r1
    mov r9, r2
    mov r10, r3
forExt:
    CMP r4, r10
    BGE endForExt
    MOV r5, #0 // j
forInt:
    CMP r5, r9
    BGE endForInt
    MOV r0, #3
    MUL r6, r4, r9 // i * width ADD r6, r6, r5 // i * width + j // MUL r6, r0, r6 // each pixel occupies 3 bytes ADD r6, r6, r8 // addr(im2) + i * width + j MOV r0, r7 MOV r1, r9 MOV r2, r10 MOV r3, r4 PUSH {r5} BL gaussian STR r0, [r6] POP {r5} ADD r5, r5, #1 B forIntendForInt: ADD r4, r4, #1 B forExtendForExt: sub sp, fp, #32 pop {r4-r10,fp,lr} bx lr    .end