[PATCH] target/arm: Fix sve2 ldnt1 and stnt1

[Richard Henderson]

The order of arguments between ldnt1 and ld1 are swapped in the
architecture, and similarly for stnt1 and st1.  Swap them in the
decode so that we have "m" be the vector operand and "n" be the
general operand.

Fixes: https://gitlab.com/qemu-project/qemu/-/issues/826
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/sve.decode | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

diff --git a/target/arm/sve.decode b/target/arm/sve.decode
index fd96baeb68..91a0873b7c 100644
--- a/target/arm/sve.decode
+++ b/target/arm/sve.decode
@@ -1577,22 +1577,25 @@ USDOT_zzzz      01000100 .. 0 ..... 011 110 ..... ..... 
 @rda_rn_rm
 
 # 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 \
+# Note that Rm and Rn are swapped, so that the vector and general
+# register arguments match LD1_zprz.
+LDNT1_zprz      1100010 msz:2 00 rn:5 1 u:1 0 pg:3 rm:5 rd:5 \
                 &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 \
+LDNT1_zprz      1000010 msz:2 00 rn:5 10 u:1 pg:3 rm:5 rd:5 \
                 &rprr_gather_load xs=0 esz=2 scale=0 ff=0
 
 ### SVE2 Memory Store Group
 
 # SVE2 64-bit scatter non-temporal store (vector plus scalar)
-STNT1_zprz      1110010 .. 00 ..... 001 ... ..... ..... \
-                @rprr_scatter_store xs=2 esz=3 scale=0
+# Note the Rm and Rn swap, similar to LDNT1_zprz.
+STNT1_zprz      1110010 msz:2 00 rn:5 001 pg:3 rm:5 rd:5 \
+                &rprr_scatter_store xs=2 esz=3 scale=0
 
 # SVE2 32-bit scatter non-temporal store (vector plus scalar)
-STNT1_zprz      1110010 .. 10 ..... 001 ... ..... ..... \
-                @rprr_scatter_store xs=0 esz=2 scale=0
+STNT1_zprz      1110010 msz:2 10 rn:5 001 pg:3 rm:5 rd:5 \
+                &rprr_scatter_store xs=0 esz=2 scale=0
 
 ### SVE2 Crypto Extensions
 
-- 
2.25.1