target/arm: Implement bfloat16 dot product (vector)

This is BFDOT for both AArch64 AdvSIMD and SVE,
and VDOT.BF16 for AArch32 NEON.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525225817.400336-7-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 9 insertions, 0 deletions

diff --git a/target/arm/translate-neon.c b/target/arm/translate-neon.c
index 6d94229c69..9460857b2a 100644
--- a/target/arm/translate-neon.c
+++ b/target/arm/translate-neon.c
@@ -296,6 +296,15 @@ static bool trans_VUSDOT(DisasContext *s, arg_VUSDOT *a)
                         gen_helper_gvec_usdot_b);
 }
 
+static bool trans_VDOT_b16(DisasContext *s, arg_VDOT_b16 *a)
+{
+    if (!dc_isar_feature(aa32_bf16, s)) {
+        return false;
+    }
+    return do_neon_ddda(s, a->q * 7, a->vd, a->vn, a->vm, 0,
+                        gen_helper_gvec_bfdot);
+}
+
 static bool trans_VFML(DisasContext *s, arg_VFML *a)
 {
     int opr_sz;