I am currently an eighth grader but I have a deep interest in ARM processors, since I'm a neophyte but I have great interest could u tell me what makes ARM processors so significant? Why? Thank you :)

Hagin

would u mind telling me please I'm really interested in this kind of stuffs.

Still more stupid questions on Cortex-A7 instruction set

Juha Aaltonen

I've beem constructing a list of Cortex-A7 ARM-instructions, and there are some questions I haven't found

an answer to in ARMv7-A/R ARM Issue C.

How is this special?

LDRD<c>_<Rt>,_<Rt2>,_<label>_LDRD<c>_<Rt>,_<Rt2>,_[PC,_#-0]_Special_case…

What does this instruction do?

Juha Aaltonen

In the ARMv7-A/R ARM Issue C I found two instructions with odd encoding: PUSH and POP, encoding A2.

What's the Rt's role? I guess Rt and 'registers'-bitlist needs to match?

Encoding A2 ARMv4*, ARMv5T*, ARMv6*, ARMv7

PUSH<c> <registers>…

Answered

Optimizing code for ARM: ARMv7, ARMv8, Memory Models and NEON Intrinsics

Matthew Du Puy

Matthew Gretton-Dann titled this presentation: Porting & Optimising Code 32-bit to 64-bit

The title is accurate but he does a better job of giving a high level overview of the ARMv7 and ARMv8 architecture differences, C++11 memory models (which become…