diff options
| author | Peter Maydell <peter.maydell@linaro.org> | 2019-06-11 16:39:49 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2019-06-13 15:14:05 +0100 |
| commit | d4893b01d23060845ee3855bc96626e16aad9ab5 (patch) | |
| tree | a92fe3bbd8616fdf0febd1ad375cb0321ad71534 /target/arm/vfp.decode | |
| parent | 519ee7ae31e050eb0ff9ad35c213f0bd7ab1c03e (diff) | |
target/arm: Convert VFP fused multiply-add insns to decodetree
Convert the VFP fused multiply-add instructions (VFNMA, VFNMS,
VFMA, VFMS) to decodetree.
Note that in the old decode structure we were implementing
these to honour the VFP vector stride/length. These instructions
were introduced in VFPv4, and in the v7A architecture they
are UNPREDICTABLE if the vector stride or length are non-zero.
In v8A they must UNDEF if stride or length are non-zero, like
all VFP instructions; we choose to UNDEF always.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'target/arm/vfp.decode')
| -rw-r--r-- | target/arm/vfp.decode | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/target/arm/vfp.decode b/target/arm/vfp.decode index de305f60e1..37eec0e131 100644 --- a/target/arm/vfp.decode +++ b/target/arm/vfp.decode @@ -142,3 +142,12 @@ VDIV_sp ---- 1110 1.00 .... .... 1010 .0.0 .... \ vm=%vm_sp vn=%vn_sp vd=%vd_sp VDIV_dp ---- 1110 1.00 .... .... 1011 .0.0 .... \ vm=%vm_dp vn=%vn_dp vd=%vd_dp + +VFM_sp ---- 1110 1.01 .... .... 1010 . o2:1 . 0 .... \ + vm=%vm_sp vn=%vn_sp vd=%vd_sp o1=1 +VFM_dp ---- 1110 1.01 .... .... 1011 . o2:1 . 0 .... \ + vm=%vm_dp vn=%vn_dp vd=%vd_dp o1=1 +VFM_sp ---- 1110 1.10 .... .... 1010 . o2:1 . 0 .... \ + vm=%vm_sp vn=%vn_sp vd=%vd_sp o1=2 +VFM_dp ---- 1110 1.10 .... .... 1011 . o2:1 . 0 .... \ + vm=%vm_dp vn=%vn_dp vd=%vd_dp o1=2 |