diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2021-06-17 13:16:13 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-06-21 17:12:51 +0100 |
| commit | 87fe14668c5aeaf764959afd43acc80b1fcc01b1 (patch) | |
| tree | f482c60393f492e721e5ddbc0d8ba7b230251eef /target/arm/translate-mve.c | |
| parent | 4462dfe1211fcc46f40592855dd80a5f63c6007f (diff) | |
target/arm: Implement MVE VQDMULL scalar
Implement the MVE VQDMULL scalar insn. This multiplies the top or
bottom half of each element by the scalar, doubles and saturates
to a double-width result.
Note that this encoding overlaps with VQADD and VQSUB; it uses
what in VQADD and VQSUB would be the 'size=0b11' encoding.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210617121628.20116-30-peter.maydell@linaro.org
Diffstat (limited to 'target/arm/translate-mve.c')
| -rw-r--r-- | target/arm/translate-mve.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/target/arm/translate-mve.c b/target/arm/translate-mve.c index 84a7320cf8..f73b36cae4 100644 --- a/target/arm/translate-mve.c +++ b/target/arm/translate-mve.c @@ -454,6 +454,36 @@ DO_2OP_SCALAR(VQDMULH_scalar, vqdmulh_scalar) DO_2OP_SCALAR(VQRDMULH_scalar, vqrdmulh_scalar) DO_2OP_SCALAR(VBRSR, vbrsr) +static bool trans_VQDMULLB_scalar(DisasContext *s, arg_2scalar *a) +{ + static MVEGenTwoOpScalarFn * const fns[] = { + NULL, + gen_helper_mve_vqdmullb_scalarh, + gen_helper_mve_vqdmullb_scalarw, + NULL, + }; + if (a->qd == a->qn && a->size == MO_32) { + /* UNPREDICTABLE; we choose to undef */ + return false; + } + return do_2op_scalar(s, a, fns[a->size]); +} + +static bool trans_VQDMULLT_scalar(DisasContext *s, arg_2scalar *a) +{ + static MVEGenTwoOpScalarFn * const fns[] = { + NULL, + gen_helper_mve_vqdmullt_scalarh, + gen_helper_mve_vqdmullt_scalarw, + NULL, + }; + if (a->qd == a->qn && a->size == MO_32) { + /* UNPREDICTABLE; we choose to undef */ + return false; + } + return do_2op_scalar(s, a, fns[a->size]); +} + static bool do_long_dual_acc(DisasContext *s, arg_vmlaldav *a, MVEGenDualAccOpFn *fn) { |