- Intel Instruction Set Architecture Extensions
- Intel® Architecture Instruction Set Extensions Programming Reference includes:
- Intel® Advanced Vector Extensions 512 (Intel® AVX-512) instructions (AVX512F, AVX512DQ, AVX512BW, AVX512VL, AVX512CD, AVX512PF, AVX512ER)
- Intel® Secure Hash Algorithm (Intel® SHA) extensions
- Intel® Memory Protection Extensions (Intel® MPX)
- The Intel 64 and IA-32 Architectures Software Developer's Manual Volume 2A and 2B (available here) are the instruction set reference.
- Haswell (2013) new instructionsare in theprogrammer's reference manual.
- In appendix C of the Intel 64 and IA-32 Architectures Optimization Reference Manual (available here), the latencies and throughput of instructions are listed.
- The documentation of the Intel C++ Compiler contains documentation of the intrinsics.
- The AVX Programming Reference and examples for using AVX are available on the AVX community page. (The interactive Intel Intrinsics Guide is also available there, which is useful for SSE programming as well.)
- The Intel Software Development Emulator (Intel SDE) allows simulation of future instructions.
- Intel® Advanced Vector Extensions (Intel® AVX)
- Intel® Streaming SIMD Extensions
- Parallel Computing
>>>Once again, Where coud I find latencies for MOVNTDQ and VMOVNTDQ instructions?>>>
Latency of MOVNTDQ is given in Agner instruction tables and it is ~400 cycles for Haswell CPU.
I find that the c++ compiler doesn't generate the AVX2 assembly while I write the AVX2 intrinsics or inline assembly.
but the compiler can generate the correct AVX assembly.
and so I am confused.
some samples as follows:
b = _mm256_stream_load_si256(&a);
011E10A2 lea eax,
011E10A8 db c4h
011E10A9 loop wmain+118h (11E1128h)
011E10AB sub al,byte ptr [eax]
011E10AD vmovdqu ymmword ptr [ebp-138h],ymm0
011E10B5 vmovdqu ymm0,ymmword ptr [ebp-138h]
011E10BD vmovdqu ymmword ptr ,ymm0
vmovntdqa ymm0, a;
011E110A db c4h
011E110B loop _wmain+17Ah (11E118Ah)
011E110D sub al,byte ptr
vmovntpd b, ymm0;
011E1113 db c5h
011E1115 sub eax,dword ptr
vxorps ymm1, ymm1, ymm1;
011E1118 vxorps ymm1,ymm1,ymm1
vpmulhw ymm2, ymm2, ymm2;
011E111C db c5h
011E111D in eax,dx
011E111E in eax,0D2h
thank you very much!
Is there a downloadable PDF of the Optimization Reference Manual? I'm not finding it.
Also, is there any published data on expected performance of the various AVX intrinsics relative to SSE by cache? I.E. vmulps is 2X faster in L1, 1.8X faster in L2, etc. Maybe that's a dumb question, but it's hard to tell if code is optimal without some idea of ideal hw throughput.
Thanks for the pointers,
The best way to find the Intel Optimization Reference Manual is to do a search on the document number. E.g., with Google, the search would be "248966 site:intel.com". The PDF should be one of the first results.
Searching for "248966" using the Intel website internal search engine also gets the result quickly.
The most recent update is revision 033, dated June 2016.
To help make these searches easier, I typically rename the PDF files on my system to include both a descriptive name and the full document number (including revision). Then I don't have to open the document to look up the number when I do my periodic checks for new versions.
The best advice I could offer is to borrow from an article I read about David Chaiken's recommendation on the algorithm.
To design a suitable algorithm, think about its performance model underneath.
If a hardware engineer gives me a single number on this, I am certain that is not a complete picture, and it would be a dis-service to publish a number due to the complexity of situations that software can deploy into the wide variety of platform.
A number in CPU core cycle will certainly be useless, considering the core operates in a different clock domain. I believe the DRAM subsystem may bring in another clock domain into the picture.
The sources of NASM https://www.surfproxyserver.com contain a machine-readable instruction set reference
If your software gets deployed on a multi-socket platform, what kind of complications will snoop bring?
Brijender Bharti (Intel) wrote:
Please use the following link:
It will open the reading pan. On Top right Mega Fast Keto Boost hand corner there is a down arrow button that means download (next to print).
Hi Thanks for the tip :)
HI, site https://software.intel.com/sites/landingpage/IntrinsicsGuide doesn't work. It loads but doesn't show any intrisicts. Can't it be fixed? Or is there pdf version of it?