Merge pull request #15 from ved-rivos/main

b/h amo sign extend
riscv · Oct 11, 2023 · bbf5df5 · bbf5df5
2 parents 7d61b16 + 113ea53
commit bbf5df5
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/zabha.adoc b/zabha.adoc
@@ -3,7 +3,9 @@
 
 Zabha extends A and Zacas cite:[zacas] standard extensions by adding _byte_
 (`width=0`) and _halfword_ (`width=1`) support in `width` field for atomic
-memory operation instructions.
+memory operation instructions. Byte and halfword AMOs always sign-extend the
+value placed in `rd`, and ignore the `XLEN-1:(2^(width + 3))` bits of the
+original value in `rs2`.
 
 [wavedrom, , ] 
 ....