target/loongarch: Add LASX data support

Signed-off-by: Song Gao <gaosong@loongson.cn>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20230914022645.1151356-12-gaosong@loongson.cn>
diff --git a/target/loongarch/vec.h b/target/loongarch/vec.h
new file mode 100644
index 0000000..2f23cae
--- /dev/null
+++ b/target/loongarch/vec.h
@@ -0,0 +1,33 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * QEMU LoongArch vector utilitites
+ *
+ * Copyright (c) 2023 Loongson Technology Corporation Limited
+ */
+
+#ifndef LOONGARCH_VEC_H
+#define LOONGARCH_VEC_H
+
+#if HOST_BIG_ENDIAN
+#define B(x)  B[(x) ^ 15]
+#define H(x)  H[(x) ^ 7]
+#define W(x)  W[(x) ^ 3]
+#define D(x)  D[(x) ^ 1]
+#define UB(x) UB[(x) ^ 15]
+#define UH(x) UH[(x) ^ 7]
+#define UW(x) UW[(x) ^ 3]
+#define UD(x) UD[(x) ^ 1]
+#define Q(x)  Q[x]
+#else
+#define B(x)  B[x]
+#define H(x)  H[x]
+#define W(x)  W[x]
+#define D(x)  D[x]
+#define UB(x) UB[x]
+#define UH(x) UH[x]
+#define UW(x) UW[x]
+#define UD(x) UD[x]
+#define Q(x)  Q[x]
+#endif /* HOST_BIG_ENDIAN */
+
+#endif /* LOONGARCH_VEC_H */