mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
f4f4caab0e
I wanted a tiny scriptable meltdown proof way to run userspace programs and visualize how program execution impacts memory. It helps to explain how things like Actually Portable Executable works. It can show you how the GCC generated code is going about manipulating matrices and more. I didn't feel fully comfortable with Qemu and Bochs because I'm not smart enough to understand them. I wanted something like gVisor but with much stronger levels of assurances. I wanted a single binary that'll run, on all major operating systems with an embedded GPL barrier ZIP filesystem that is tiny enough to transpile to JavaScript and run in browsers too. https://justine.storage.googleapis.com/emulator625.mp4
14 lines
512 B
C
14 lines
512 B
C
#ifndef COSMOPOLITAN_LIBC_LCG_H_
|
|
#define COSMOPOLITAN_LIBC_LCG_H_
|
|
#if !(__ASSEMBLER__ + __LINKER__ + 0)
|
|
|
|
forceinline uint64_t KnuthLinearCongruentialGenerator(uint64_t prev[1]) {
|
|
/* Knuth, D.E., "The Art of Computer Programming," Vol 2,
|
|
Seminumerical Algorithms, Third Edition, Addison-Wesley, 1998,
|
|
p. 106 (line 26) & p. 108 */
|
|
prev[0] = prev[0] * 6364136223846793005 + 1442695040888963407;
|
|
return prev[0];
|
|
}
|
|
|
|
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
|
|
#endif /* COSMOPOLITAN_LIBC_LCG_H_ */
|