I recently had to debug a MachO binary and I came across the following instruction :- ldr.w r4, [r1, r0, lsl #2] I understand that ldr r4, [r1, r0, lsl #2] shifts r0 to the left two times, adds i...

I'm trying to learn skills useful in firmware modding (for which i don't have source code) These questions concern use of BX from thumb code to jump or call other existing thumb code. How do i us...

I've heard it might be a good idea to turn off "compile for thumb" in an iPhone target's settings to increase performance. I'm having some trouble finding this setting though. Since I couldn't find...

I have this C code: int test(signed char anim_col) { if (anim_col >= 31) { return 1; } else if (anim_col <= -15) { return -2; } return 0; } That compiles to the following thumb code ...

Guys, I have a project which I have compiled for the ARM Cortex-A8 processor. I'm making use of GCC to do this. Currently the size of my executable is 220.1 KB. Now I modify my makefile and I add t...

I was wondering if anyone had any hard numbers on ARM vs Thumb code performance on iPhone 3GS. Specifically for non-floating point (VFP or NEON) code - I'm aware of the issues with floating point p...