target/arm: Implement MVE VSHRN, VRSHRN
Implement the MVE shift-right-and-narrow insn VSHRN and VRSHRN.
do_urshr() is borrowed from sve_helper.c.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210628135835.6690-12-peter.maydell@linaro.org
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c
index b031f84..f1a8f21 100644
--- a/target/arm/translate-mve.c
+++ b/target/arm/translate-mve.c
@@ -911,3 +911,18 @@
DO_VSHLL(VSHLL_BU, vshllbu)
DO_VSHLL(VSHLL_TS, vshllts)
DO_VSHLL(VSHLL_TU, vshlltu)
+
+#define DO_2SHIFT_N(INSN, FN) \
+ static bool trans_##INSN(DisasContext *s, arg_2shift *a) \
+ { \
+ static MVEGenTwoOpShiftFn * const fns[] = { \
+ gen_helper_mve_##FN##b, \
+ gen_helper_mve_##FN##h, \
+ }; \
+ return do_2shift(s, a, fns[a->size], false); \
+ }
+
+DO_2SHIFT_N(VSHRNB, vshrnb)
+DO_2SHIFT_N(VSHRNT, vshrnt)
+DO_2SHIFT_N(VRSHRNB, vrshrnb)
+DO_2SHIFT_N(VRSHRNT, vrshrnt)
