diff options
Diffstat (limited to 'gcc/fortran/intrinsic.texi')
| -rw-r--r-- | gcc/fortran/intrinsic.texi | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/gcc/fortran/intrinsic.texi b/gcc/fortran/intrinsic.texi index f390761..3aa068d 100644 --- a/gcc/fortran/intrinsic.texi +++ b/gcc/fortran/intrinsic.texi @@ -11792,10 +11792,10 @@ end program test_random_seed Returns a single pseudorandom number or an array of pseudorandom numbers from the uniform distribution over the range @math{ 0 \leq x < 1}. -The runtime-library implements the xorshift1024* random number -generator (RNG). This generator has a period of @math{2^{1024} - 1}, -and when using multiple threads up to @math{2^{512}} threads can each -generate @math{2^{512}} random numbers before any aliasing occurs. +The runtime-library implements the xoshiro256** pseudorandom number +generator (PRNG). This generator has a period of @math{2^{256} - 1}, +and when using multiple threads up to @math{2^{128}} threads can each +generate @math{2^{128}} random numbers before any aliasing occurs. Note that in a multi-threaded program (e.g. using OpenMP directives), each thread will have its own random number state. For details of the @@ -11852,7 +11852,7 @@ called either without arguments or with the @var{PUT} argument, the given seed is copied into a master seed as well as the seed of the current thread. When a new thread uses @code{RANDOM_NUMBER} for the first time, the seed is copied from the master seed, and forwarded -@math{N * 2^{512}} steps to guarantee that the random stream does not +@math{N * 2^{128}} steps to guarantee that the random stream does not alias any other stream in the system, where @var{N} is the number of threads that have used @code{RANDOM_NUMBER} so far during the program execution. |