diff options
| author | Richard Henderson <richard.henderson@linaro.org> | 2022-03-07 17:16:55 -1000 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2022-03-18 10:55:15 +0000 |
| commit | b17ab4705c78484d1bdd86cd9c1f7d42338cc1f1 (patch) | |
| tree | 9f1d45ce0530f2c9176f72f213c122d18e65fc15 /target/arm/sve.decode | |
| parent | 1d60bb4b14601e38ed17384277aa4c30c57925d3 (diff) | |
target/arm: Fix sve2 ldnt1 and stnt1
For both ldnt1 and stnt1, the meaning of the Rn and Rm are different
from ld1 and st1: the vector and integer registers are reversed, and
the integer register 31 refers to XZR instead of SP.
Secondly, the 64-bit version of ldnt1 was being interpreted as
32-bit unpacked unscaled offset instead of 64-bit unscaled offset,
which discarded the upper 32 bits of the address coming from
the vector argument.
Thirdly, validate that the memory element size is in range for the
vector element size for ldnt1. For ld1, we do this via independent
decode patterns, but for ldnt1 we need to do it manually.
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/826
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 20220308031655.240710-1-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/sve.decode')
| -rw-r--r-- | target/arm/sve.decode | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/target/arm/sve.decode b/target/arm/sve.decode index c60b9f0fec..0388cce3bd 100644 --- a/target/arm/sve.decode +++ b/target/arm/sve.decode @@ -1575,10 +1575,9 @@ USDOT_zzzz 01000100 .. 0 ..... 011 110 ..... ..... @rda_rn_rm ### SVE2 Memory Gather Load Group -# SVE2 64-bit gather non-temporal load -# (scalar plus unpacked 32-bit unscaled offsets) +# SVE2 64-bit gather non-temporal load (scalar plus 64-bit unscaled offsets) LDNT1_zprz 1100010 msz:2 00 rm:5 1 u:1 0 pg:3 rn:5 rd:5 \ - &rprr_gather_load xs=0 esz=3 scale=0 ff=0 + &rprr_gather_load xs=2 esz=3 scale=0 ff=0 # SVE2 32-bit gather non-temporal load (scalar plus 32-bit unscaled offsets) LDNT1_zprz 1000010 msz:2 00 rm:5 10 u:1 pg:3 rn:5 rd:5 \ |