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-rw-r--r--gcc-4.9/gcc/testsuite/gcc.target/i386/avx-os-support.h18
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.target/i386/avx-os-support.h b/gcc-4.9/gcc/testsuite/gcc.target/i386/avx-os-support.h
new file mode 100644
index 000000000..fb1ce7562
--- /dev/null
+++ b/gcc-4.9/gcc/testsuite/gcc.target/i386/avx-os-support.h
@@ -0,0 +1,18 @@
+/* Check if the OS supports executing AVX instructions. */
+
+#define XCR_XFEATURE_ENABLED_MASK 0x0
+
+#define XSTATE_FP 0x1
+#define XSTATE_SSE 0x2
+#define XSTATE_YMM 0x4
+
+static int
+avx_os_support (void)
+{
+ unsigned int eax, edx;
+ unsigned int ecx = XCR_XFEATURE_ENABLED_MASK;
+
+ __asm__ ("xgetbv" : "=a" (eax), "=d" (edx) : "c" (ecx));
+
+ return (eax & (XSTATE_SSE | XSTATE_YMM)) == (XSTATE_SSE | XSTATE_YMM);
+}