rdrand

问题 There is an Intel DRNG Library that allows you to use a random number generator based on the processor's crystal entropy effect. The library itself and an instruction of its use: https://software.intel.com/en-us/articles/intel-digital-random-number-generator-drng-library-implementation-and-uses There is an example inside a library that just prints the contents of a randomly generated array. Please, share the working example in C, which allows using this library to generate a float type number

问题 There is an Intel DRNG Library that allows you to use a random number generator based on the processor's crystal entropy effect. The library itself and an instruction of its use: https://software.intel.com/en-us/articles/intel-digital-random-number-generator-drng-library-implementation-and-uses There is an example inside a library that just prints the contents of a randomly generated array. Please, share the working example in C, which allows using this library to generate a float type number

问题 Does Intel C++ compiler and/or GCC support the following intrinsics, like MSVC does since 2012 / 2013? int _rdrand16_step(uint16_t*); int _rdrand32_step(uint32_t*); int _rdrand64_step(uint64_t*); int _rdseed16_step(uint16_t*); int _rdseed32_step(uint32_t*); int _rdseed64_step(uint64_t*); And if these intrinsics are supported, since which version are they supported (with compile-time-constant please)? 回答1: Both GCC and Intel compiler support them. GCC support was introduced at the end of 2010.

问题 Does Intel C++ compiler and/or GCC support the following intrinsics, like MSVC does since 2012 / 2013? int _rdrand16_step(uint16_t*); int _rdrand32_step(uint32_t*); int _rdrand64_step(uint64_t*); int _rdseed16_step(uint16_t*); int _rdseed32_step(uint32_t*); int _rdseed64_step(uint64_t*); And if these intrinsics are supported, since which version are they supported (with compile-time-constant please)? 回答1: Both GCC and Intel compiler support them. GCC support was introduced at the end of 2010.

问题 I was looking at H.J. Lu's PATCH: Update x86 rdrand intrinsics. I can't tell if I should be using _rdrand_u64 , _rdrand64_step , or if there are other function(s). There does not appear to be test cases written for them. There also seems to be a lack of man pages (from Ubuntu 14, GCC 4.8.4): $ man -k rdrand rdrand: nothing appropriate. How does one use the RDRAND intrinsics to generate, say, a block of 32 bytes? A related question is RDRAND and RDSEED intrinsics GCC and Intel C++. But it does

问题 I have seen that Intel seems to have included a new assembly function to get real random numbers obtained from hardware. The name of the instruction is RdRand , but only a small amount of details seem accessible on it on Internet: http://en.wikipedia.org/wiki/RdRand My questions concerning this new instruction and its use in C++11 are the following: Are the random numbers generated with RdRand really random? (each bit generated from uncorrelated white noise or quantum processes? ) Is it a

问题 Cpuid says that I have rdrand on my system, but rdrand instruction throws sigill. I'm using linux mint inside VmWare workstation 11, I googled workstation support of rdrand, and they say that it enabled since 9th version. Proccess of host is i5-2550k and it should support rdrand. Can I somehow fix this? Here is gdb listing: Breakpoint 1, 0x08048060 in _start () (gdb) x/5i $eip => 0x8048060 <_start>: mov $0x1,%eax 0x8048065 <_start+5>: cpuid 0x8048067 <_start+7>: rdrand %eax 0x804806a <_start

问题 I'm using an Intel Ivy Bridge CPU and want to use the RDRAND opcode (https://software.intel.com/en-us/articles/intel-digital-random-number-generator-drng-software-implementation-guide) in C#. How can I call this CPU instruction via C#? I've seen an example of executing assembly code from c# here: x86/x64 CPUID in C# But I'm not sure how to use it for RDRAND. The code doesn't need to check whether the CPU executing the code supports the instruction or not. I've seen this C++ example of

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I'm looking to consume Intel's Digital Random Number Generator (the RDRAND instruction in Ivy Bridge) from a C# assembly. I've looked at cpp libs but I was hoping there was a more "managed" solution. Any ideas? 回答1: The best I can find is here: Rdrand manual and library (Windows* version) Rdrand manual and

问题 Are there any ready made libraries so that the intel hardware prng (rdrand) can be used by numpy programs to fill buffers of random numbers? Failing this can someone point me in the right direction for some C code that I could adapt or use (I use CPython and Cython with numpy so the bare minimum wrapper shd be enough). The random generators I want are uniform random numbers between [0,1). 回答1: This code will use /dev/urandom (Unix) or CryptGenRandom APIs (Windows). Which RNG is used, hardware