From b02c7f1bcd4fab4097b9b4b99d08a8287ae25ca8 Mon Sep 17 00:00:00 2001
From: Gabe Black <gblack@eecs.umich.edu>
Date: Wed, 2 Jun 2010 12:58:03 -0500
Subject: ARM: Move the macro mem constructor out of the isa desc. This code
 doesn't use the parser at all, and moving it out reduces the conceptual
 complexity of that code.

---
 src/arch/arm/insts/macromem.cc | 121 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 121 insertions(+)
 create mode 100644 src/arch/arm/insts/macromem.cc

(limited to 'src/arch/arm/insts/macromem.cc')

diff --git a/src/arch/arm/insts/macromem.cc b/src/arch/arm/insts/macromem.cc
new file mode 100644
index 000000000..bb69f0991
--- /dev/null
+++ b/src/arch/arm/insts/macromem.cc
@@ -0,0 +1,121 @@
+/*
+ * Copyright (c) 2010 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) 2007-2008 The Florida State University
+ * 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.
+ *
+ * Authors: Stephen Hines
+ */
+
+#include "arch/arm/insts/macromem.hh"
+#include "arch/arm/decoder.hh"
+
+using namespace ArmISAInst;
+
+namespace ArmISA
+{
+
+MacroMemOp::MacroMemOp(const char *mnem, ExtMachInst machInst,
+                       OpClass __opClass, IntRegIndex rn,
+                       bool index, bool up, bool user, bool writeback,
+                       bool load, uint32_t reglist) :
+    PredMacroOp(mnem, machInst, __opClass)
+{
+    uint32_t regs = reglist;
+    uint32_t ones = number_of_ones(reglist);
+    // Remember that writeback adds a uop
+    numMicroops = ones + (writeback ? 1 : 0) + 1;
+    microOps = new StaticInstPtr[numMicroops];
+    uint32_t addr = 0;
+
+    if (!up)
+        addr = (ones << 2) - 4;
+
+    if (!index)
+        addr += 4;
+
+    // Add 0 to Rn and stick it in ureg0.
+    // This is equivalent to a move.
+    microOps[0] = new MicroAddiUop(machInst, INTREG_UREG0, rn, 0);
+
+    unsigned reg = 0;
+    bool force_user = user & !bits(reglist, 15);
+    bool exception_ret = user & bits(reglist, 15);
+
+    for (int i = 1; i < ones + 1; i++) {
+        // Find the next register.
+        while (!bits(regs, reg))
+            reg++;
+        replaceBits(regs, reg, 0);
+
+        unsigned regIdx = reg;
+        if (force_user) {
+            regIdx = intRegForceUser(regIdx);
+        }
+
+        if (load) {
+            if (reg == INTREG_PC && exception_ret) {
+                // This must be the exception return form of ldm.
+                microOps[i] =
+                    new MicroLdrRetUop(machInst, regIdx,
+                                       INTREG_UREG0, up, addr);
+            } else {
+                microOps[i] =
+                    new MicroLdrUop(machInst, regIdx, INTREG_UREG0, up, addr);
+            }
+        } else {
+            microOps[i] =
+                new MicroStrUop(machInst, regIdx, INTREG_UREG0, up, addr);
+        }
+
+        if (up)
+            addr += 4;
+        else
+            addr -= 4;
+    }
+
+    StaticInstPtr &lastUop = microOps[numMicroops - 1];
+    if (writeback) {
+        if (up) {
+            lastUop = new MicroAddiUop(machInst, rn, rn, ones * 4);
+        } else {
+            lastUop = new MicroSubiUop(machInst, rn, rn, ones * 4);
+        }
+    }
+    lastUop->setLastMicroop();
+}
+
+}
-- 
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