From: David Given <dg@cowlark.com>
Date: Mon, 10 Oct 2016 22:29:18 +0000 (+0200)
Subject: A few more opcodes.
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=668cccdff1d5292893f13e9c88a4312aa43a9d6e;p=ack.git

A few more opcodes.
---

diff --git a/mach/proto/mcg/table b/mach/proto/mcg/table
index 20ef46b2b..f50f02c11 100644
--- a/mach/proto/mcg/table
+++ b/mach/proto/mcg/table
@@ -301,7 +301,11 @@ PATTERNS
 		cost 4;
 
 	out:(int)reg = SUB4(left:(int)reg, right:(int)reg)
-		emit "sub %out, %right, %left"
+		emit "subf %out, %left, %right"
+		cost 4;
+
+	out:(int)reg = SUB4(left:(int)reg, right:CONST4)
+		emit "addi %out, %left, -($right)"
 		cost 4;
 
 	out:(int)reg = MUL4(left:(int)reg, right:(int)reg)
diff --git a/mach/proto/mcg/treebuilder.c b/mach/proto/mcg/treebuilder.c
index 8039b3449..828a99747 100644
--- a/mach/proto/mcg/treebuilder.c
+++ b/mach/proto/mcg/treebuilder.c
@@ -217,6 +217,30 @@ static void insn_simple(int opcode)
             break;
         }
 
+        case op_inc:
+        {
+            push(
+                new_ir2(
+                    IR_ADD, EM_wordsize,
+                    pop(EM_wordsize),
+                    new_wordir(1)
+                )
+            );
+            break;
+        }
+
+        case op_dec:
+        {
+            push(
+                new_ir2(
+                    IR_SUB, EM_wordsize,
+                    pop(EM_wordsize),
+                    new_wordir(1)
+                )
+            );
+            break;
+        }
+
         default:
             fatal("treebuilder: unknown simple instruction '%s'",
                 em_mnem[opcode - sp_fmnem]);