From 3f6b5e337b282bd8675a97e048e267e6f90ccec6 Mon Sep 17 00:00:00 2001
From: Julian Blake Kongslie
Date: Mon, 17 Oct 2022 17:54:53 -0700
Subject: Clean up address handling and change autoinc to preincrement

---
 isa/decode.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'isa/decode.cpp')

diff --git a/isa/decode.cpp b/isa/decode.cpp
index cb6a694..03e2225 100644
--- a/isa/decode.cpp
+++ b/isa/decode.cpp
@@ -252,7 +252,7 @@ instruction_context decode(unsigned int dfifb, unsigned int pc, unsigned int bit
 
     // Instructions with memory operands may be direct or indirect
     if (inst.need_exec_load || inst.need_exec_store || inst.possibly_redirects) {
-        auto addr = (df << 12) | ((bits & 00200) ? (inst.next_pc & 07600) : 0) | (bits & 00177);
+        auto addr = (df << 12) | ((bits & 00200) ? (pc & 07600) : 0) | (bits & 00177);
         if (bits & 00400) {
             inst.need_indirect_load = true;
             inst.init_address = addr;
@@ -262,7 +262,7 @@ instruction_context decode(unsigned int dfifb, unsigned int pc, unsigned int bit
     }
 
     // Non-jump indirect memory operands may be autoincrementing depending on operand bits
-    if (!inst.possibly_redirects && inst.need_indirect_load && ((bits & 00170) == 00010))
+    if (!inst.possibly_redirects && inst.need_indirect_load && ((inst.init_address.value() & 07770) == 00010))
         inst.need_autoinc_store = true;
 
     return inst;
-- 
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