diff options
Diffstat (limited to 'sys/arch/amd64/include/cpufunc.h')
| -rw-r--r-- | sys/arch/amd64/include/cpufunc.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sys/arch/amd64/include/cpufunc.h b/sys/arch/amd64/include/cpufunc.h index f0599634079..bda18a00287 100644 --- a/sys/arch/amd64/include/cpufunc.h +++ b/sys/arch/amd64/include/cpufunc.h @@ -1,4 +1,4 @@ -/* $OpenBSD: cpufunc.h,v 1.13 2016/09/04 09:22:28 mpi Exp $ */ +/* $OpenBSD: cpufunc.h,v 1.14 2017/04/27 06:16:39 mlarkin Exp $ */ /* $NetBSD: cpufunc.h,v 1.3 2003/05/08 10:27:43 fvdl Exp $ */ /*- @@ -335,6 +335,16 @@ xsetbv(uint32_t reg, uint64_t mask) __asm volatile("xsetbv" :: "c" (reg), "a" (lo), "d" (hi) : "memory"); } +static __inline uint64_t +xgetbv(uint32_t reg) +{ + uint32_t lo, hi; + + __asm volatile("xgetbv" : "=a" (lo), "=d" (hi) : "c" (reg)); + + return (((uint64_t)hi << 32) | (uint64_t)lo); +} + /* Break into DDB/KGDB. */ static __inline void breakpoint(void) |