+#ifdef UCONTEXT_FREGS
+#define UCONTEXT_REG_XMM
+#define UCONTEXT_REG_XMM0(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM0])
+#define UCONTEXT_REG_XMM1(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM1])
+#define UCONTEXT_REG_XMM2(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM2])
+#define UCONTEXT_REG_XMM3(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM3])
+#define UCONTEXT_REG_XMM4(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM4])
+#define UCONTEXT_REG_XMM5(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM5])
+#define UCONTEXT_REG_XMM6(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM6])
+#define UCONTEXT_REG_XMM7(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM7])
+#define UCONTEXT_REG_XMM8(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM8])
+#define UCONTEXT_REG_XMM9(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM9])
+#define UCONTEXT_REG_XMM10(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM10])
+#define UCONTEXT_REG_XMM11(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM11])
+#define UCONTEXT_REG_XMM12(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM12])
+#define UCONTEXT_REG_XMM13(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM13])
+#define UCONTEXT_REG_XMM14(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM14])
+#define UCONTEXT_REG_XMM15(ctx) (UCONTEXT_FREGS ((ctx)) [AMD64_XMM15])
+#endif
+