From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
Date: Tue, 30 Aug 2022 13:20:08 +0000 (+0100)
Subject: Revert "remove fuck-up by programmerjake not reading the specification for svstep"
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=6140b25e7c7746a654d7d75750e67692196a7258;p=openpower-isa.git

Revert "remove fuck-up by programmerjake not reading the specification for svstep"

This reverts commit 1a06aea1fe266a75af713ac9815306696a1ffa4e.
---

diff --git a/src/openpower/sv/trans/svp64.py b/src/openpower/sv/trans/svp64.py
index b55e0654..0c3e3f87 100644
--- a/src/openpower/sv/trans/svp64.py
+++ b/src/openpower/sv/trans/svp64.py
@@ -1295,6 +1295,12 @@ class SVP64Asm:
         if not v30b_op.endswith('.'):
             v30b_op_rc += rc
 
+        # svstep is weird
+        # FIXME(lkcl): should sv.svstep be like svstep?
+        if v30b_op_rc in ("svstep", "svstep."):
+            # compensate for `SVi -= 1` in svstep()
+            v30b_newfields[1] = str(int(v30b_newfields[1]) + 1)
+
         custom_insn_hook = CUSTOM_INSNS.get(v30b_op_rc)
         if custom_insn_hook is not None:
             fields = tuple(map(to_number, v30b_newfields))