diff options
Diffstat (limited to 'src/cpu/o3')
| -rw-r--r-- | src/cpu/o3/rename_impl.hh | 6 | ||||
| -rw-r--r-- | src/cpu/o3/rename_map.hh | 23 |
2 files changed, 27 insertions, 2 deletions
diff --git a/src/cpu/o3/rename_impl.hh b/src/cpu/o3/rename_impl.hh index 04a9020d7..7bf33d3ff 100644 --- a/src/cpu/o3/rename_impl.hh +++ b/src/cpu/o3/rename_impl.hh @@ -1,5 +1,5 @@ /* - * Copyright (c) 2010-2012, 2014 ARM Limited + * Copyright (c) 2010-2012, 2014-2015 ARM Limited * Copyright (c) 2013 Advanced Micro Devices, Inc. * All rights reserved. * @@ -633,7 +633,9 @@ DefaultRename<Impl>::renameInsts(ThreadID tid) // Check here to make sure there are enough destination registers // to rename to. Otherwise block. - if (renameMap[tid]->numFreeEntries() < inst->numDestRegs()) { + if (!renameMap[tid]->canRename(inst->numIntDestRegs(), + inst->numFPDestRegs(), + inst->numCCDestRegs())) { DPRINTF(Rename, "Blocking due to lack of free " "physical registers to rename to.\n"); blockThisCycle = true; diff --git a/src/cpu/o3/rename_map.hh b/src/cpu/o3/rename_map.hh index 1aa3bc702..9d91f232e 100644 --- a/src/cpu/o3/rename_map.hh +++ b/src/cpu/o3/rename_map.hh @@ -1,4 +1,16 @@ /* + * Copyright (c) 2015 ARM Limited + * All rights reserved. + * + * The license below extends only to copyright in the software and shall + * not be construed as granting a license to any other intellectual + * property including but not limited to intellectual property relating + * to a hardware implementation of the functionality of the software + * licensed hereunder. You may use the software subject to the license + * terms below provided that you ensure that this notice is replicated + * unmodified and in its entirety in all distributions of the software, + * modified or unmodified, in source code or in binary form. + * * Copyright (c) 2004-2005 The Regents of The University of Michigan * Copyright (c) 2013 Advanced Micro Devices, Inc. * All rights reserved. @@ -346,6 +358,17 @@ class UnifiedRenameMap { return std::min(intMap.numFreeEntries(), floatMap.numFreeEntries()); } + + /** + * Return whether there are enough registers to serve the request. + */ + bool canRename(uint32_t intRegs, uint32_t floatRegs, uint32_t ccRegs) const + { + return intRegs <= intMap.numFreeEntries() && + floatRegs <= floatMap.numFreeEntries() && + ccRegs <= ccMap.numFreeEntries(); + } + }; #endif //__CPU_O3_RENAME_MAP_HH__ |