src/lib/libcompiler_rt, branch release/10.4.0

MFC r323001:

2017-09-05T17:32:14Z

In compiler-rt, a few assembler implementations for i386 floating point conversion functions use SSE2 instructions, but these are not guarded by #ifdef __SSE2__, and there is no implementation using general purpose registers. For these functions, use the generic C variants instead, otherwise they will cause SIGILL on older processors. Approved by: re (kib) Reported by: bsdpr@phoe.frmug.org PR: 221733 MFC r323014: Follow-up to r323001: if the actually selected CPUTYPE is capable of SSE2 instructions, we can use them. Suggested by: jkim PR: 221733

Unconditionally compile the __sync_* atomics support functions into compiler-rt

2013-08-31T08:50:45Z

for ARM. This is quite ugly, because it has to work around a clang bug that does not allow built-in functions to be defined, even when they're ones that are expected to be built as part of a library. Reviewed by: ed

Build __clear_cache on ARM with clang now it supports it.

2013-06-15T12:16:27Z

Let ARM use the custom tailored atomic intrinsics.

2013-06-15T09:04:10Z

Use improved __sync_*() intrinsics for MIPS in userspace as well.

2013-06-08T13:22:53Z

r251524 introduced custom tailored versions for MIPS of these functions for kernel-space code. We can just reuse them in userspace as well.

Add __sync_synchronize().

2013-05-30T06:20:50Z

This function can easily be implemented on top of the mb() macro provided by .

Use #ifdef instead of #if defined.

2013-05-30T06:20:23Z

This makes these tests a bit more consistent with the tests done at the bottom of the file.

Unbreak on ARM + Clang.

2013-04-27T04:56:02Z

Clang only supports atomic operations for ARMv6. For non-ARMv6, we still need to emit these functions. Clang's prototype for these functions slightly differs, as it is truly based on GCC's documentation. It requires the use of signed types, but also requires varargs. Still, we are not allowed to simply implement this function directly. Cleverly work around this by implementing it under a different name and using __strong_reference().

Enable libcompiler-rt on MIPS.

2013-04-20T14:44:28Z

Originally we disabled libcompiler-rt on MIPS and SPARC64, because of an issue where __clzdi2 and __ctzdi2 would cause endless recursion. This bug has been fixed in r230021 already, but for some reason we only switched to libcompiler-rt on SPARC64 -- not MIPS. This means we can finally use on all our architectures.

Add the __aeabi_mem* functions to compiler-rt as clang uses them.

2013-02-06T00:01:28Z