Alexey Brodkin 71621525c3 arc: Fine-tune implementation of memory barriers ... We improve on 2 things: 1. Only ARC HS family has "dmb" instructions so do compile-time check for automatically defined macro __ARCHS__. Previous check for ARCv2 ISA was not good enough because ARC EM family is v2 ISA as well but still "dmb" instaruction is not supported in EM family. 2. Still if there's no dedicated instruction for memory barrier let's at least insert compile-time barrier to make sure compiler deosn't reorder critical memory operations. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>		2018-03-21 16:21:34 +03:00
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asm	arc: Fine-tune implementation of memory barriers	2018-03-21 16:21:34 +03:00