Doesn't yet fully work.

Thomas is going to finish debugging while I'm on the RISCV summit next week.

tests/wally-riscv-arch-test/riscv-test-suite/rv64i_m/privilege/references/WALLY-misaligned-access-01.reference_output

@@ -128,39 +128,42 @@ deadbeef
 77767574
 7b7a7978
 7f7e7d7c
-04030201 # Word1DstData
-08070605
-0c0b0a09
-100f0e0d
-14130211
-18171615
-1c1b1a19
-201f1e1d
-24232221
-28272625
-2c2b2a29
-302f2e2d
-34330231
-38373635
-3c3b3a39
-403f3e3d
-44434241
-48474645
-4c4b4a49
-504f4e4d
-54530251
-58575655
-5c5b5a59
-605f5e5d
-64636261
-68676665
-6c6b6a69
-706f6e6d
-74730271
-78777675
-7c7b7a79
-de7f7e7d
-05040302 # Word2DstData
+020100ef # Word1DstData
+06050403
+0a090807
+0e0d0c0b
+0211100f
+16151413
+1a191817
+1e1d1c1b
+2221201f
+26252423
+2a292827
+2e2d2c2b
+0231302f
+36353433
+3a393837
+3e3d3c3b
+4241403f
+46454443
+4a494847
+4e4d4c4b
+0251504f
+56555453
+5a595857
+5e5d5c5b
+6261605f
+66656463
+6a696867
+6e6d6c6b
+0271706f
+76757473
+7a797877
+7e7d7c7b
+deadbe7f
+deadbeef
+0100beef # Word2DstData
+05040302
 09080706
 0d0c0b0a
 11100f0e
@@ -192,6 +195,7 @@ de7f7e7d
 79787776
 7d7c7b7a
 dead7f7e
+deadbeef
 06050403 # Word3DstData
 0a090807
 0e0d0c0b
@@ -224,6 +228,7 @@ dead7f7e
 7a797877
 7e7d7c7b
 deadbe7f
+deadbeef
 03020100 # Double0DstData
 07060504
 0b0a0908