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+// -*- mode:c++ -*-
+
+// Copyright (c) 2003-2005 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.
+
+output header {{
+ /**
+ * Base class for integer immediate instructions.
+ */
+ class IntegerImm : public AlphaStaticInst
+ {
+ protected:
+ /// Immediate operand value (unsigned 8-bit int).
+ uint8_t imm;
+
+ /// Constructor
+ IntegerImm(const char *mnem, MachInst _machInst, OpClass __opClass)
+ : AlphaStaticInst(mnem, _machInst, __opClass), imm(INTIMM)
+ {
+ }
+
+ std::string
+ generateDisassembly(Addr pc, const SymbolTable *symtab) const;
+ };
+}};
+
+output decoder {{
+ std::string
+ IntegerImm::generateDisassembly(Addr pc, const SymbolTable *symtab) const
+ {
+ std::stringstream ss;
+
+ ccprintf(ss, "%-10s ", mnemonic);
+
+ // just print the first source reg... if there's
+ // a second one, it's a read-modify-write dest (Rc),
+ // e.g. for CMOVxx
+ if (_numSrcRegs > 0) {
+ printReg(ss, _srcRegIdx[0]);
+ ss << ",";
+ }
+
+ ss << (int)imm;
+
+ if (_numDestRegs > 0) {
+ ss << ",";
+ printReg(ss, _destRegIdx[0]);
+ }
+
+ return ss.str();
+ }
+}};
+
+
+def template RegOrImmDecode {{
+ {
+ AlphaStaticInst *i =
+ (IMM) ? (AlphaStaticInst *)new %(class_name)sImm(machInst)
+ : (AlphaStaticInst *)new %(class_name)s(machInst);
+ if (RC == 31) {
+ i = makeNop(i);
+ }
+ return i;
+ }
+}};
+
+// Primary format for integer operate instructions:
+// - Generates both reg-reg and reg-imm versions if Rb_or_imm is used.
+// - Generates NOP if RC == 31.
+def format IntegerOperate(code, *opt_flags) {{
+ # If the code block contains 'Rb_or_imm', we define two instructions,
+ # one using 'Rb' and one using 'imm', and have the decoder select
+ # the right one.
+ uses_imm = (code.find('Rb_or_imm') != -1)
+ if uses_imm:
+ orig_code = code
+ # base code is reg version:
+ # rewrite by substituting 'Rb' for 'Rb_or_imm'
+ code = re.sub(r'Rb_or_imm', 'Rb', orig_code)
+ # generate immediate version by substituting 'imm'
+ # note that imm takes no extenstion, so we extend
+ # the regexp to replace any extension as well
+ imm_code = re.sub(r'Rb_or_imm(\.\w+)?', 'imm', orig_code)
+
+ # generate declaration for register version
+ cblk = CodeBlock(code)
+ iop = InstObjParams(name, Name, 'AlphaStaticInst', cblk, opt_flags)
+ header_output = BasicDeclare.subst(iop)
+ decoder_output = BasicConstructor.subst(iop)
+ exec_output = BasicExecute.subst(iop)
+
+ if uses_imm:
+ # append declaration for imm version
+ imm_cblk = CodeBlock(imm_code)
+ imm_iop = InstObjParams(name, Name + 'Imm', 'IntegerImm', imm_cblk,
+ opt_flags)
+ header_output += BasicDeclare.subst(imm_iop)
+ decoder_output += BasicConstructor.subst(imm_iop)
+ exec_output += BasicExecute.subst(imm_iop)
+ # decode checks IMM bit to pick correct version
+ decode_block = RegOrImmDecode.subst(iop)
+ else:
+ # no imm version: just check for nop
+ decode_block = OperateNopCheckDecode.subst(iop)
+}};