Automatic Rustup

Rounding intrinsics are now implemented for `f16` and `f128` and tests for `is_infinite`, NaN, `abs`, `copysign`, `min`, `max`, rounding, `*_fast` and `*_algebraic` have been added.

miri: improve support for `f16` and `f128`

Rounding intrinsics are now implemented for `f16` and `f128` and tests for `is_infinite`, NaN, `abs`, `copysign`, `min`, `max`, rounding, `*_fast` and `*_algebraic` have been added.

pthread-threadname: ensure we can see the name set via the Rust API

…fJung

tail_calls: add test ensuring local vars are indeed gone

Ensure that local variables get deallocated before the callee gets tail-called.

Automatic Rustup

Add `set_last_error_and_return_i64`, change calls from
`this.libc_eval` to `LibcError`, and replace pairs of
`set_last_error` and returning values of the right type
with the new helper functions

Replace set_last_error with set_last_error_and_return

Took care of the simple patterns. Other patterns involved setting an error and then using `write_int` or setting metadata and returning -1. Unsure if those are in the scope of this change

Looks like this has conflicts with rust-lang#3779, so I can update when how to handle that is decided.

Part of rust-lang/miri#3930.

Android: Added support for prctl handling thread names

Addresses the first part of rust-lang#3618.

Automatic Rustup

epoll_ctl: throw unsupported error on unsupported opcode

`@tiif` this is a somewhat suspicious "return -1" without setting the `errno` -- what is the reasoning behind that?

Throwing a clear error seems better to me.

Switch CI to merge queues

Clear `eval_libc` errors from unix shims

fix error returned from readdir_r when isolation is enabled, and uses of raw_os_error