From: Ronald S. Bultje <[email protected]>
Signed-off-by: Diego Biurrun <[email protected]>
---
configure | 2 ++
libavutil/x86/cpu.c | 14 ++++++++++++++
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index 657e6d8..32270db 100755
--- a/configure
+++ b/configure
@@ -1128,6 +1128,7 @@ HAVE_LIST="
rdtsc
round
roundf
+ rweflags
sched_getaffinity
sdl
sdl_video_size
@@ -2750,6 +2751,7 @@ elif enabled x86; then
check_code ld immintrin.h "_xgetbv(0)" && enable xgetbv
check_code ld intrin.h "int info[4]; _cpuid(info, 0)" && enable cpuid
check_code ld intrin.h "__rdtsc()" && enable rdtsc
+ check_code ld intrin.h "unsigned int x = __readeflags()" && enable rweflags
check_code ld mmintrin.h "_mm_empty()" && enable mm_empty
diff --git a/libavutil/x86/cpu.c b/libavutil/x86/cpu.c
index 70e3125..6ddfebd 100644
--- a/libavutil/x86/cpu.c
+++ b/libavutil/x86/cpu.c
@@ -62,6 +62,8 @@
} while (0)
#endif /* HAVE_XGETBV */
+#if HAVE_INLINE_ASM
+
#define get_eflags(x) \
__asm__ volatile ("pushfl \n" \
"pop %0 \n" \
@@ -72,6 +74,18 @@
"popfl \n" \
:: "r"(x))
+#elif HAVE_RWEFLAGS
+
+#include <intrin.h>
+
+#define get_eflags(x) \
+ x = __readeflags()
+
+#define set_eflags(x) \
+ __writeeflags(x)
+
+#endif /* HAVE_INLINE_ASM */
+
/* Function to test if multimedia instructions are supported... */
int ff_get_cpu_flags_x86(void)
{
--
1.7.1
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
