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authorGabe Black <gblack@eecs.umich.edu>2007-08-07 15:23:01 -0700
committerGabe Black <gblack@eecs.umich.edu>2007-08-07 15:23:01 -0700
commitd79a591608106b1de4bf2cbc9b9eb31ed5bf14e9 (patch)
tree1a6a3d06d51bc432ff74a6fa43ce619e12efcc08
parent60c61cb2b1af83b2685f40d427fee920ba85eb08 (diff)
downloadgem5-d79a591608106b1de4bf2cbc9b9eb31ed5bf14e9.tar.xz
X86: Add a format to handle string instructions which can use the repe and repne prefixes.
--HG-- extra : convert_revision : 205fbbb947258bc0ef2915e22d5b32a3df1a1ce2
-rw-r--r--src/arch/x86/isa/formats/formats.isa4
-rw-r--r--src/arch/x86/isa/formats/string.isa88
2 files changed, 92 insertions, 0 deletions
diff --git a/src/arch/x86/isa/formats/formats.isa b/src/arch/x86/isa/formats/formats.isa
index 1e7bb4a74..6906413c0 100644
--- a/src/arch/x86/isa/formats/formats.isa
+++ b/src/arch/x86/isa/formats/formats.isa
@@ -99,6 +99,10 @@
//thing on a variety of inputs
##include "multi.isa"
+//Include a format which implements an extra layer of decoding to handle the
+//repe and repne prefixes
+##include "string.isa"
+
//Include a format which makes instructions who's sole purpose is to generate
//a syscall.
##include "syscall.isa"
diff --git a/src/arch/x86/isa/formats/string.isa b/src/arch/x86/isa/formats/string.isa
new file mode 100644
index 000000000..cd182ff62
--- /dev/null
+++ b/src/arch/x86/isa/formats/string.isa
@@ -0,0 +1,88 @@
+// -*- mode:c++ -*-
+
+// Copyright (c) 2007 The Hewlett-Packard Development Company
+// All rights reserved.
+//
+// Redistribution and use of this software in source and binary forms,
+// with or without modification, are permitted provided that the
+// following conditions are met:
+//
+// The software must be used only for Non-Commercial Use which means any
+// use which is NOT directed to receiving any direct monetary
+// compensation for, or commercial advantage from such use. Illustrative
+// examples of non-commercial use are academic research, personal study,
+// teaching, education and corporate research & development.
+// Illustrative examples of commercial use are distributing products for
+// commercial advantage and providing services using the software for
+// commercial advantage.
+//
+// If you wish to use this software or functionality therein that may be
+// covered by patents for commercial use, please contact:
+// Director of Intellectual Property Licensing
+// Office of Strategy and Technology
+// Hewlett-Packard Company
+// 1501 Page Mill Road
+// Palo Alto, California 94304
+//
+// 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 HOLDER(s), HEWLETT-PACKARD COMPANY, nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission. No right of
+// sublicense is granted herewith. Derivatives of the software and
+// output created using the software may be prepared, but only for
+// Non-Commercial Uses. Derivatives of the software may be shared with
+// others provided: (i) the others agree to abide by the list of
+// conditions herein which includes the Non-Commercial Use restrictions;
+// and (ii) such Derivatives of the software include the above copyright
+// notice to acknowledge the contribution from this software where
+// applicable, this list of conditions and the disclaimer below.
+//
+// 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.
+//
+// Authors: Gabe Black
+
+//////////////////////////////////////////////////////////////////////////
+//
+// String Instructions
+//
+//////////////////////////////////////////////////////////////////////////
+
+def format StringInst(*opTypeSet) {{
+ allBlocks = OutputBlocks()
+
+ regBlocks = specializeInst(Name, list(opTypeSet), EmulEnv())
+ eBlocks = specializeInst(Name + "_E", list(opTypeSet), EmulEnv())
+ nBlocks = specializeInst(Name + "_N", list(opTypeSet), EmulEnv())
+
+ for blocks in (regBlocks, eBlocks, nBlocks):
+ allBlocks.header_output += blocks.header_output
+ allBlocks.decoder_output += blocks.decoder_output
+ allBlocks.exec_output += blocks.exec_output
+
+ allBlocks.decode_block = '''
+ if (LEGACY_REP) {
+ %s
+ } else if (LEGACY_REPNE) {
+ %s
+ } else {
+ %s
+ }
+ ''' % (eBlocks.decode_block, nBlocks.decode_block, regBlocks.decode_block)
+
+ (header_output, decoder_output,
+ decode_block, exec_output) = allBlocks.makeList()
+}};