From 61b1e75f7d8004461f2e18f171c26c2f545eed32 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Thu, 21 Jan 2016 19:28:15 +0000 Subject: overhaul sh atomics for new atomics framework, add j-core cas.l backend sh needs runtime-selected atomic backends since there are a number of supported models that use non-forwards-compatible (non-smp-compatible) atomic mechanisms. previously, the code paths for this were highly inefficient since they involved C function calls with multiple branches in the callee and heavy spills in the caller. the new code performs calls the runtime-selected asm fragment from inline asm with extremely minimal clobbers, rather than using a function call. for the sh4a case where the atomic mechanism is known and there is no forward-compatibility issue, the movli.l and movco.l instructions are provided as a_ll and a_sc, allowing the new shared atomic.h to generate efficient inline versions of all the basic atomic operations without needing a cas loop. --- src/thread/sh/__set_thread_area.s | 0 1 file changed, 0 insertions(+), 0 deletions(-) delete mode 100644 src/thread/sh/__set_thread_area.s (limited to 'src/thread/sh/__set_thread_area.s') diff --git a/src/thread/sh/__set_thread_area.s b/src/thread/sh/__set_thread_area.s deleted file mode 100644 index e69de29b..00000000 -- cgit v1.2.1