1 files changed, 63 insertions, 0 deletions
diff --git a/third_party/dav1d/src/cpu.c b/third_party/dav1d/src/cpu.c
new file mode 100644
index 0000000000..f8a909f28d
--- /dev/null
+++ b/third_party/dav1d/src/cpu.c
@@ -0,0 +1,63 @@
+/*
+ * Copyright © 2018, VideoLAN and dav1d authors
+ * Copyright © 2018, Two Orioles, LLC
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+#include "config.h"
+
+#include <stdint.h>
+
+#include "src/cpu.h"
+
+static unsigned flags = 0;
+
+#if __has_feature(memory_sanitizer)
+// memory sanitizer is inherently incompatible with asm
+static unsigned flags_mask = 0;
+#elif ARCH_X86
+/* Disable AVX-512 by default for the time being */
+static unsigned flags_mask = ~DAV1D_X86_CPU_FLAG_AVX512ICL;
+#else
+static unsigned flags_mask = -1;
+#endif
+
+COLD void dav1d_init_cpu(void) {
+#if HAVE_ASM
+#if ARCH_AARCH64 || ARCH_ARM
+    flags = dav1d_get_cpu_flags_arm();
+#elif ARCH_PPC64LE
+    flags = dav1d_get_cpu_flags_ppc();
+#elif ARCH_X86
+    flags = dav1d_get_cpu_flags_x86();
+#endif
+#endif
+}
+
+COLD unsigned dav1d_get_cpu_flags(void) {
+    return flags & flags_mask;
+}
+
+COLD void dav1d_set_cpu_flags_mask(const unsigned mask) {
+    flags_mask = mask;
+}