Change Details

Rather than implementing the recurrence using 3 16-bit integers, as was done in _dorand48() before this patch, provide an equivalent implementation using 64-bit integers. For drand48() and erand48(), replace the use of ldexp() with bit-twiddling assuming IEEE 754 double-precision float layout. This implementation is significantly faster and requires less code.

Rather than implementing the recurrence using 3 16-bit integers, as was done in _dorand48() before this patch, provide an equivalent implementation using 64-bit integers. For drand48() and erand48(), replace the use of ldexp() with bit-twiddling assuming IEEE 754 double-precision float layout. This implementation is significantly faster and requires less code. Obtained from: https://github.com/apple-oss-distributions/libc

Rather than implementing the recurrence using 3 16-bit integers, as was done in _dorand48() before this patch, provide an equivalent implementation using 64-bit integers. For drand48() and erand48(), replace the use of ldexp() with bit-twiddling assuming IEEE 754 double-precision float layout. This implementation is significantly faster and requires less code. Obtained from: https://github.com/apple-oss-distributions/libc