Agner's CPU blog

A chimera is a monster combining parts from different animals, or an organism containing multiple different sets of DNA. I am calling Intel's new Alder Lake processor a chimera because it is a hybrid containing two different kinds of CPU cores with very different designs. The Alder Lake processor co...

Modern high-end microprocessors are able to handle unaligned access quite efficiently in most cases. In your case, the caches, prefetchers, and in/out buffers are handling the alignment issue smoothly while the bottleneck that determines the execution time is the exchange of data between caches and ...

I don't know. ARM is off-topic here.
You may post the question at stackoverflow.com

rejesh_g wrote This sounds interesting. Are you still looking for folks to work on this project? Yes indeed. Please look at https://www.forwardcom.info . The first softcore is working. You may start trying to run the examples in the emulator. If you have the FPGA board you can also try the examples ...

You are probably right. I don't remember much about the NetBurst architecture. Why do you care? NetBurst is long dead.

STA at port 7 calculates the address for a store. The address can be calculated before the data to store is available. The calculated address is passed back to the scheduler where it waits until STD at port 4 needs it. For example: MOV [RAX+RBX],ECX. Here RAX and RBX go to STA to calculate the addre...

The explanation is that mulss xmm0,xmm1 is using 32 bits of a 128 bits register. The remaining 96 bits of xmm0 are unchanged. This gives you a false dependence that delays the next iteration. Possible solutions: use the whole register (mulps xmm0, xmm1) or clear or reload the register between iterat...

I will suggest that you ask this question at stackoverflow.com

It is complicated to calculate the remainder with reasonable accuracy for high x. The vector class library is doing this in the sin, cos, and tan functions. See the file vectormath_trig.h in https://github.com/vectorclass/version2 If you are using the reduced x for a trigonometric function anyway th...

No. It is using temporary registers inside the CPU. It is not using the cache.