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| author | Peter Maydell <peter.maydell@linaro.org> | 2021-06-17 13:16:13 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2021-06-24 14:58:47 +0100 |
| commit | a88903537d73b1d9728e3d824920b4d0096f10bc (patch) | |
| tree | 10929776a7bb5b54e9a2464defa3c05bc99d1e8f /target/arm/translate-mve.c | |
| parent | 66c0576754b100606e041fef54e5b897417426c7 (diff) | |
| download | qemu-a88903537d73b1d9728e3d824920b4d0096f10bc.zip qemu-a88903537d73b1d9728e3d824920b4d0096f10bc.tar.gz qemu-a88903537d73b1d9728e3d824920b4d0096f10bc.tar.bz2 | |
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 84a7320..f73b36c 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) { |