src/arch/arm/isa/templates/neon.isa - amd/gem5 - Git at Google

 // -*- mode:c++ -*-

 // Copyright (c) 2010-2012, 2016 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.
 //
 // 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: Gabe Black

 let {{
     simdEnabledCheckCode = '''
     {
         Fault fault = checkAdvSIMDOrFPEnabled32(xc->tcBase(),
                                                 Cpsr, Cpacr, Nsacr, Fpexc,
                                                 true, true);
         if (fault != NoFault)
             return fault;
     }
     '''
 }};


 def template NeonRegRegRegOpDeclare {{
 template <class _Element>
 class %(class_name)s : public %(base_class)s
 {
   protected:
     typedef _Element Element;
   public:
     // Constructor
     %(class_name)s(ExtMachInst machInst,
                    IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2)
         : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
                          _dest, _op1, _op2)
     {
         %(constructor)s;
         if (!(condCode == COND_AL || condCode == COND_UC)) {
             for (int x = 0; x < _numDestRegs; x++) {
                 _srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
             }
         }
     }

     Fault execute(ExecContext *, Trace::InstRecord *) const override;
 };
 }};

 def template NeonRegRegRegImmOpDeclare {{
 template <class _Element>
 class %(class_name)s : public %(base_class)s
 {
   protected:
     typedef _Element Element;
   public:
     // Constructor
     %(class_name)s(ExtMachInst machInst,
                    IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2,
                    uint64_t _imm)
         : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
                          _dest, _op1, _op2, _imm)
     {
         %(constructor)s;
         if (!(condCode == COND_AL || condCode == COND_UC)) {
             for (int x = 0; x < _numDestRegs; x++) {
                 _srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
             }
         }
     }

     Fault execute(ExecContext *, Trace::InstRecord *) const override;
 };
 }};

 def template NeonRegRegImmOpDeclare {{
 template <class _Element>
 class %(class_name)s : public %(base_class)s
 {
   protected:
     typedef _Element Element;
   public:
     // Constructor
     %(class_name)s(ExtMachInst machInst,
                    IntRegIndex _dest, IntRegIndex _op1, uint64_t _imm)
         : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
                          _dest, _op1, _imm)
     {
         %(constructor)s;
         if (!(condCode == COND_AL || condCode == COND_UC)) {
             for (int x = 0; x < _numDestRegs; x++) {
                 _srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
             }
         }
     }

     Fault execute(ExecContext *, Trace::InstRecord *) const override;
 };
 }};

 def template NeonRegImmOpDeclare {{
 template <class _Element>
 class %(class_name)s : public %(base_class)s
 {
   protected:
     typedef _Element Element;
   public:
     // Constructor
     %(class_name)s(ExtMachInst machInst, IntRegIndex _dest, uint64_t _imm)
         : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s, _dest, _imm)
     {
         %(constructor)s;
         if (!(condCode == COND_AL || condCode == COND_UC)) {
             for (int x = 0; x < _numDestRegs; x++) {
                 _srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
             }
         }
     }

     Fault execute(ExecContext *, Trace::InstRecord *) const override;
 };
 }};

 def template NeonRegRegOpDeclare {{
 template <class _Element>
 class %(class_name)s : public %(base_class)s
 {
   protected:
     typedef _Element Element;
   public:
     // Constructor
     %(class_name)s(ExtMachInst machInst,
                    IntRegIndex _dest, IntRegIndex _op1)
         : %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
                          _dest, _op1)
     {
         %(constructor)s;
         if (!(condCode == COND_AL || condCode == COND_UC)) {
             for (int x = 0; x < _numDestRegs; x++) {
                 _srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
             }
         }
     }

     Fault execute(ExecContext *, Trace::InstRecord *) const override;
 };
 }};

 def template NeonExecDeclare {{
     template
     Fault %(class_name)s<%(targs)s>::execute(
             ExecContext *, Trace::InstRecord *) const;
 }};

 output header {{
     template <class T>
     // Implement a less-than-zero function: ltz()
     // this function exists because some versions of GCC complain when a
     // comparison is done between a unsigned variable and 0 and for GCC 4.2
     // there is no way to disable this warning
     inline bool ltz(T t);

     template <>
     inline bool ltz(uint8_t) { return false; }
     template <>
     inline bool ltz(uint16_t) { return false; }
     template <>
     inline bool ltz(uint32_t) { return false; }
     template <>
     inline bool ltz(uint64_t) { return false; }
     template <>
     inline bool ltz(int8_t v) { return v < 0; }
     template <>
     inline bool ltz(int16_t v) { return v < 0; }
     template <>
     inline bool ltz(int32_t v) { return v < 0; }
     template <>
     inline bool ltz(int64_t v) { return v < 0; }
 }};

 def template NeonEqualRegExecute {{
     template <class Element>
     Fault %(class_name)s<Element>::execute(ExecContext *xc,
             Trace::InstRecord *traceData) const
     {
         Fault fault = NoFault;
         %(op_decl)s;
         %(op_rd)s;

         const unsigned rCount = %(r_count)d;
         const unsigned eCount = rCount * sizeof(FloatRegBits) / sizeof(Element);

         union RegVect {
             FloatRegBits regs[rCount];
             Element elements[eCount];
         };

         if (%(predicate_test)s)
         {
             %(code)s;
             if (fault == NoFault)
             {
                 %(op_wb)s;
             }
         } else {
             xc->setPredicate(false);
         }

         return fault;
     }
 }};

 output header {{
         template <typename T>
             struct bigger_type_t;

         template<> struct bigger_type_t<uint8_t> { typedef uint16_t type; };
         template<> struct bigger_type_t<uint16_t> { typedef uint32_t type; };
         template<> struct bigger_type_t<uint32_t> { typedef uint64_t type; };

         template<> struct bigger_type_t<int8_t> { typedef int16_t type; };
         template<> struct bigger_type_t<int16_t> { typedef int32_t type; };
         template<> struct bigger_type_t<int32_t> { typedef int64_t type; };
 }};

 def template NeonUnequalRegExecute {{
     template <class Element>
     Fault %(class_name)s<Element>::execute(ExecContext *xc,
             Trace::InstRecord *traceData) const
     {
         typedef typename bigger_type_t<Element>::type BigElement;
         Fault fault = NoFault;
         %(op_decl)s;
         %(op_rd)s;

         const unsigned rCount = %(r_count)d;
         const unsigned eCount = rCount * sizeof(FloatRegBits) / sizeof(Element);

         union RegVect {
             FloatRegBits regs[rCount];
             Element elements[eCount];
             BigElement bigElements[eCount / 2];
         };

         union BigRegVect {
             FloatRegBits regs[2 * rCount];
             BigElement elements[eCount];
         };

         if (%(predicate_test)s)
         {
             %(code)s;
             if (fault == NoFault)
             {
                 %(op_wb)s;
             }
         } else {
             xc->setPredicate(false);
         }

         return fault;
     }
 }};
	// -- mode:c++ --

	// Copyright (c) 2010-2012, 2016 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.
	//
	// 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: Gabe Black

	let {{
	simdEnabledCheckCode = '''
	{
	Fault fault = checkAdvSIMDOrFPEnabled32(xc->tcBase(),
	Cpsr, Cpacr, Nsacr, Fpexc,
	true, true);
	if (fault != NoFault)
	return fault;
	}
	'''
	}};


	def template NeonRegRegRegOpDeclare {{
	template <class _Element>
	class %(class_name)s : public %(base_class)s
	{
	protected:
	typedef _Element Element;
	public:
	// Constructor
	%(class_name)s(ExtMachInst machInst,
	IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2)
	: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
	_dest, _op1, _op2)
	{
	%(constructor)s;
	if (!(condCode == COND_AL \|\| condCode == COND_UC)) {
	for (int x = 0; x < _numDestRegs; x++) {
	_srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
	}
	}
	}

	Fault execute(ExecContext , Trace::InstRecord ) const override;
	};
	}};

	def template NeonRegRegRegImmOpDeclare {{
	template <class _Element>
	class %(class_name)s : public %(base_class)s
	{
	protected:
	typedef _Element Element;
	public:
	// Constructor
	%(class_name)s(ExtMachInst machInst,
	IntRegIndex _dest, IntRegIndex _op1, IntRegIndex _op2,
	uint64_t _imm)
	: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
	_dest, _op1, _op2, _imm)
	{
	%(constructor)s;
	if (!(condCode == COND_AL \|\| condCode == COND_UC)) {
	for (int x = 0; x < _numDestRegs; x++) {
	_srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
	}
	}
	}

	Fault execute(ExecContext , Trace::InstRecord ) const override;
	};
	}};

	def template NeonRegRegImmOpDeclare {{
	template <class _Element>
	class %(class_name)s : public %(base_class)s
	{
	protected:
	typedef _Element Element;
	public:
	// Constructor
	%(class_name)s(ExtMachInst machInst,
	IntRegIndex _dest, IntRegIndex _op1, uint64_t _imm)
	: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
	_dest, _op1, _imm)
	{
	%(constructor)s;
	if (!(condCode == COND_AL \|\| condCode == COND_UC)) {
	for (int x = 0; x < _numDestRegs; x++) {
	_srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
	}
	}
	}

	Fault execute(ExecContext , Trace::InstRecord ) const override;
	};
	}};

	def template NeonRegImmOpDeclare {{
	template <class _Element>
	class %(class_name)s : public %(base_class)s
	{
	protected:
	typedef _Element Element;
	public:
	// Constructor
	%(class_name)s(ExtMachInst machInst, IntRegIndex _dest, uint64_t _imm)
	: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s, _dest, _imm)
	{
	%(constructor)s;
	if (!(condCode == COND_AL \|\| condCode == COND_UC)) {
	for (int x = 0; x < _numDestRegs; x++) {
	_srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
	}
	}
	}

	Fault execute(ExecContext , Trace::InstRecord ) const override;
	};
	}};

	def template NeonRegRegOpDeclare {{
	template <class _Element>
	class %(class_name)s : public %(base_class)s
	{
	protected:
	typedef _Element Element;
	public:
	// Constructor
	%(class_name)s(ExtMachInst machInst,
	IntRegIndex _dest, IntRegIndex _op1)
	: %(base_class)s("%(mnemonic)s", machInst, %(op_class)s,
	_dest, _op1)
	{
	%(constructor)s;
	if (!(condCode == COND_AL \|\| condCode == COND_UC)) {
	for (int x = 0; x < _numDestRegs; x++) {
	_srcRegIdx[_numSrcRegs++] = _destRegIdx[x];
	}
	}
	}

	Fault execute(ExecContext , Trace::InstRecord ) const override;
	};
	}};

	def template NeonExecDeclare {{
	template
	Fault %(class_name)s<%(targs)s>::execute(
	ExecContext , Trace::InstRecord ) const;
	}};

	output header {{
	template <class T>
	// Implement a less-than-zero function: ltz()
	// this function exists because some versions of GCC complain when a
	// comparison is done between a unsigned variable and 0 and for GCC 4.2
	// there is no way to disable this warning
	inline bool ltz(T t);

	template <>
	inline bool ltz(uint8_t) { return false; }
	template <>
	inline bool ltz(uint16_t) { return false; }
	template <>
	inline bool ltz(uint32_t) { return false; }
	template <>
	inline bool ltz(uint64_t) { return false; }
	template <>
	inline bool ltz(int8_t v) { return v < 0; }
	template <>
	inline bool ltz(int16_t v) { return v < 0; }
	template <>
	inline bool ltz(int32_t v) { return v < 0; }
	template <>
	inline bool ltz(int64_t v) { return v < 0; }
	}};

	def template NeonEqualRegExecute {{
	template <class Element>
	Fault %(class_name)s<Element>::execute(ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	Fault fault = NoFault;
	%(op_decl)s;
	%(op_rd)s;

	const unsigned rCount = %(r_count)d;
	const unsigned eCount = rCount * sizeof(FloatRegBits) / sizeof(Element);

	union RegVect {
	FloatRegBits regs[rCount];
	Element elements[eCount];
	};

	if (%(predicate_test)s)
	{
	%(code)s;
	if (fault == NoFault)
	{
	%(op_wb)s;
	}
	} else {
	xc->setPredicate(false);
	}

	return fault;
	}
	}};

	output header {{
	template <typename T>
	struct bigger_type_t;

	template<> struct bigger_type_t<uint8_t> { typedef uint16_t type; };
	template<> struct bigger_type_t<uint16_t> { typedef uint32_t type; };
	template<> struct bigger_type_t<uint32_t> { typedef uint64_t type; };

	template<> struct bigger_type_t<int8_t> { typedef int16_t type; };
	template<> struct bigger_type_t<int16_t> { typedef int32_t type; };
	template<> struct bigger_type_t<int32_t> { typedef int64_t type; };
	}};

	def template NeonUnequalRegExecute {{
	template <class Element>
	Fault %(class_name)s<Element>::execute(ExecContext *xc,
	Trace::InstRecord *traceData) const
	{
	typedef typename bigger_type_t<Element>::type BigElement;
	Fault fault = NoFault;
	%(op_decl)s;
	%(op_rd)s;

	const unsigned rCount = %(r_count)d;
	const unsigned eCount = rCount * sizeof(FloatRegBits) / sizeof(Element);

	union RegVect {
	FloatRegBits regs[rCount];
	Element elements[eCount];
	BigElement bigElements[eCount / 2];
	};

	union BigRegVect {
	FloatRegBits regs[2 * rCount];
	BigElement elements[eCount];
	};

	if (%(predicate_test)s)
	{
	%(code)s;
	if (fault == NoFault)
	{
	%(op_wb)s;
	}
	} else {
	xc->setPredicate(false);
	}

	return fault;
	}
	}};