- 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)
I am confused by CPUID data (see below) of SKL emulation with the latest version (7.39-win) of Intel SDE.
CPUID.07H.EBX.SGX[bit 2] = 0, but, CPUID.12H.EAX.SGX1[bit 0] = 1. How should I understand this?
I encounter the following error message with the latest version (7.39-win) of Intel SDE, when I attempt the "-p4" switch. What is the preferred way of using the "-p4" switch?
TID 0 SDE-ERROR: Executed instruction not valid for specified chip (PENTIUM4): 0x7ffbaa344fa2: syscall
Instruction bytes are: 0f 05
I refer to the document of ISA extensions at <https://software.intel.com/sites/default/files/managed/07/b7/319433-023..... (page 2-18)
The highest valid sub-leaf index, n, is
(POPCNT(CPUID.(EAX=0D, ECX=0):EAX) + POPCNT(CPUID.(EAX=0D, ECX=0):EDX) - 1)
How to obtain this formula of the highest valid sub-leaf index of CPUID.0DH?
Many factors that can make programs difficult for automatic vectorization. We will examine some of the factors that can make vectorizing code problematic without providing the compiler with some additional hints. Vectorizing loops is critical for increasing your applications’ performance, and Intel Advisor XE is the tool that can guide you through the process of vectorization.
Intel Advisor XE 2016 is a dynamic analysis tool that now contains a Vectorization Advisor feature. Using Vectorization Advisor you can survey all the loops in your application and see:
Is self-modifying code allowed in SGX enclaves? I created a simple example that just calls a function stored in a data buffer. I changed the properties for the enclave DLL so that data is also executable. It worked when I compiled the project in simulation mode, but it crashes in hardware mode.