Added some patterns for shifts with constant shift count

diff --git a/mach/i86/ncg/table b/mach/i86/ncg/table
index b5d19db..cec0bfe 100644 (file)
--- a/mach/i86/ncg/table
+++ b/mach/i86/ncg/table
@@ -986,6 +986,22 @@ with REG REG
   gen sal %1,{ANYCON,1}
       rcl %2,{ANYCON,1}                yields %2 %1
 
+pat loc sli $1==2 && $2==4
+with REG REG
+  gen sal %1,{ANYCON,1}
+      rcl %2,{ANYCON,1}
+      sal %1,{ANYCON,1}
+      rcl %2,{ANYCON,1}                yields %2 %1
+
+pat loc sli $1==3 && $2==4
+with REG REG
+  gen sal %1,{ANYCON,1}
+      rcl %2,{ANYCON,1}
+      sal %1,{ANYCON,1}
+      rcl %2,{ANYCON,1}
+      sal %1,{ANYCON,1}
+      rcl %2,{ANYCON,1}                yields %2 %1
+
 pat loc sli $1==16 && $2==4
 with rmorconst rmorconst       yields %1 {ANYCON,0}
 
@@ -1019,6 +1035,22 @@ with REG REG
   gen sar %2,{ANYCON,1}
       rcr %1,{ANYCON,1}                yields %2 %1
 
+pat loc sri $1==2 && $2==4
+with REG REG
+  gen sar %2,{ANYCON,1}
+      rcr %1,{ANYCON,1}
+      sar %2,{ANYCON,1}
+      rcr %1,{ANYCON,1}                yields %2 %1
+
+pat loc sri $1==3 && $2==4
+with REG REG
+  gen sar %2,{ANYCON,1}
+      rcr %1,{ANYCON,1}
+      sar %2,{ANYCON,1}
+      rcr %1,{ANYCON,1}
+      sar %2,{ANYCON,1}
+      rcr %1,{ANYCON,1}                yields %2 %1
+
 pat sri $1==2
 with SHIFT_CREG REG
   gen sar %2,cl                        yields %2