From 7e39ffe1135ee6ca1dc119f6eea9566668fd0916 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Sun, 17 Jun 2018 17:53:15 +0000 Subject: [PATCH] On x86-64, make MB/WMB compiler barriers Whie on x86(64) one does not normally need full memory barriers, it's good practice to at least use compiler barriers for places where on other architectures memory barriers are used; this prevents the compiler from over-optimizing. --- common_x86_64.h | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/common_x86_64.h b/common_x86_64.h index 7461aaf..3236778 100644 --- a/common_x86_64.h +++ b/common_x86_64.h @@ -60,8 +60,13 @@ #endif */ +#ifdef __GNUC__ +#define MB __asm__ __volatile__("": : :"memory") +#define WMB __asm__ __volatile__("": : :"memory") +#else #define MB #define WMB +#endif static void __inline blas_lock(volatile BLASULONG *address){ -- 2.7.4