Merge zizzer.eecs.umich.edu:/z/m5/Bitkeeper/m5

into  zizzer.eecs.umich.edu:/.automount/poolfs/z/home/stever/bk/m5

--HG--
extra : convert_revision : c777f18ba8462b7286ec8588b859de8f4091a772

arch/alpha/isa_desc

@@ -2660,6 +2660,28 @@ decode OPCODE default Unknown::unknown() {
 	}
     }
 
+    format HwMoveIPR {
+	0x19: hw_mfpr({{
+	    // this instruction is only valid in PAL mode
+	    if (!xc->inPalMode()) {
+		fault = Unimplemented_Opcode_Fault;
+	    }
+	    else {
+		Ra = xc->readIpr(ipr_index, fault);
+	    }
+	}});
+	0x1d: hw_mtpr({{
+	    // this instruction is only valid in PAL mode
+	    if (!xc->inPalMode()) {
+		fault = Unimplemented_Opcode_Fault;
+	    }
+	    else {
+		xc->setIpr(ipr_index, Ra);
+		if (traceData) { traceData->setData(Ra); }
+	    }
+	}});
+    }
+
     format BasicOperate {
 	0x1e: hw_rei({{ xc->hwrei(); }}, IsSerializing);
 
@@ -2700,35 +2722,12 @@ decode OPCODE default Unknown::unknown() {
 		AlphaPseudo::readfile(xc->xcBase());
 	    }}, IsNonSpeculative);
             0x51: m5break({{
-        AlphaPseudo::debugbreak(xc->xcBase());
-        }}, IsNonSpeculative);
+		AlphaPseudo::debugbreak(xc->xcBase());
+	    }}, IsNonSpeculative);
             0x52: m5switchcpu({{
-        AlphaPseudo::switchcpu(xc->xcBase());
-        }}, IsNonSpeculative);
-
+		AlphaPseudo::switchcpu(xc->xcBase());
+	    }}, IsNonSpeculative);
 	}
     }
-
-    format HwMoveIPR {
-	0x19: hw_mfpr({{
-	    // this instruction is only valid in PAL mode
-	    if (!xc->inPalMode()) {
-		fault = Unimplemented_Opcode_Fault;
-	    }
-	    else {
-		Ra = xc->readIpr(ipr_index, fault);
-	    }
-	}});
-	0x1d: hw_mtpr({{
-	    // this instruction is only valid in PAL mode
-	    if (!xc->inPalMode()) {
-		fault = Unimplemented_Opcode_Fault;
-	    }
-	    else {
-		xc->setIpr(ipr_index, Ra);
-		if (traceData) { traceData->setData(Ra); }
-	    }
-	}});
-    }
 #endif
 }

build/SConstruct

@@ -320,12 +320,25 @@ for build_dir in build_dirs:
     # Make a copy of the default environment to use for this config.
     env = base_env.Copy()
     # Set env according to the build directory config.
-    options_file = os.path.join('build_options', build_dir)
-    if os.path.isfile(options_file):
-        sticky_opts.files = [options_file]
-    else:
-        print "Options file %s not found, using defaults." % options_file
 
+    sticky_opts.files = []
+    default_options_file = os.path.join('build_options', 'default', build_dir)
+    if os.path.isfile(default_options_file):
+        sticky_opts.files.append(default_options_file)
+    current_options_file = os.path.join('build_options', 'current', build_dir)
+    if os.path.isfile(current_options_file):
+        sticky_opts.files.append(current_options_file)
+    else:
+        # if file doesn't exist, make sure at least the directory is there
+        # so we can create it later
+        opt_dir = os.path.dirname(current_options_file)
+        if not os.path.isdir(opt_dir):
+            os.mkdir(opt_dir)
+    if not sticky_opts.files:
+        print "%s: No options file found in build_options, using defaults." \
+              % build_dir
+
+    # Apply current option settings to env
     sticky_opts.Update(env)
     nonsticky_opts.Update(env)
 
@@ -353,8 +366,8 @@ for build_dir in build_dirs:
             env.ParseConfig(mysql_config_libs)
             env.ParseConfig(mysql_config_include)
 
-    # Save sticky option settings back to file
-    sticky_opts.Save(options_file, env)
+    # Save sticky option settings back to current options file
+    sticky_opts.Save(current_options_file, env)
 
     # Do this after we save setting back, or else we'll tack on an
     # extra 'qdo' every time we run scons.