implement AND for r/m32, r32

samsonjs · Feb 15, 2010 · e3b220d · e3b220d
1 parent 9667c21
commit e3b220d
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/asm/binary.rb b/asm/binary.rb
@@ -834,7 +834,12 @@ def shr(op, n)
 
 
     def and_(dest, src)
-      if rm?(dest, 8) && immediate?(src, 8)
+      if rm?(dest) && register?(src)
+        asm do
+          emit_byte(0x21)
+          emit_modrm(dest, src.regnum)
+        end
+      elsif rm?(dest, 8) && immediate?(src, 8)
         asm do
           emit_byte(0x80)
           emit_modrm(dest, 4)