diff options
Diffstat (limited to 'cpu/beta_cpu/iew_impl.hh')
| -rw-r--r-- | cpu/beta_cpu/iew_impl.hh | 34 |
1 files changed, 29 insertions, 5 deletions
diff --git a/cpu/beta_cpu/iew_impl.hh b/cpu/beta_cpu/iew_impl.hh index 79dd809ad..39c854833 100644 --- a/cpu/beta_cpu/iew_impl.hh +++ b/cpu/beta_cpu/iew_impl.hh @@ -1,11 +1,35 @@ +/* + * Copyright (c) 2004-2005 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + // @todo: Fix the instantaneous communication among all the stages within // iew. There's a clear delay between issue and execute, yet backwards -// communication happens simultaneously. Might not be that bad really... -// it might skew stats a bit though. Issue would otherwise try to issue -// instructions that would never be executed if there were a delay; without -// it issue will simply squash. Make this stage block properly. +// communication happens simultaneously. // Update the statuses for each stage. -// Actually read instructions out of the skid buffer. #include <queue> |