1 files changed, 50 insertions, 0 deletions
diff --git a/tools/debugserver/source/MacOSX/HasAVX.s b/tools/debugserver/source/MacOSX/HasAVX.s
new file mode 100644
index 0000000000000..b66ccf14dbeed
--- /dev/null
+++ b/tools/debugserver/source/MacOSX/HasAVX.s
@@ -0,0 +1,50 @@
+//===-- HasAVX.s ---------------------------------------*- x86 Assembly -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#if defined (__i386__) || defined (__x86_64__)
+
+.globl _HasAVX
+
+_HasAVX:
+#if defined (__x86_64__)
+    pushq %rbp
+    movq %rsp, %rbp
+    pushq %rbx
+#else
+    pushl %ebp
+    movl %esp, %ebp
+    pushl %ebx
+#endif
+    mov $1, %eax
+    cpuid                                                                       // clobbers ebx
+    and $0x018000000, %ecx
+    cmp $0x018000000, %ecx
+    jne not_supported
+    mov $0, %ecx
+.byte 0x0f, 0x01, 0xd0    // xgetbv, for those assemblers that don't know it
+    and $0x06, %eax
+    cmp $0x06, %eax
+    jne not_supported
+    mov $1, %eax
+    jmp done
+not_supported:
+    mov $0, %eax
+done:
+#if defined (__x86_64__)
+    popq %rbx
+    movq %rbp, %rsp
+    popq %rbp
+#else
+    popl %ebx
+    movl %ebp, %esp
+    popl %ebp
+#endif
+    ret                                                                         // return
+
+#endif