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/*
* Copyright (c) 2003-2005 The Regents of The University of Michigan
* 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: Korey Sewell
* Stephen Hines
*/
#ifndef __ARCH_ARM_UTILITY_HH__
#define __ARCH_ARM_UTILITY_HH__
#include "arch/arm/miscregs.hh"
#include "arch/arm/types.hh"
#include "base/misc.hh"
#include "base/types.hh"
#include "config/full_system.hh"
#include "cpu/thread_context.hh"
class ThreadContext;
namespace ArmISA {
inline bool
testPredicate(CPSR cpsr, ConditionCode code)
{
switch (code)
{
case COND_EQ: return cpsr.z;
case COND_NE: return !cpsr.z;
case COND_CS: return cpsr.c;
case COND_CC: return !cpsr.c;
case COND_MI: return cpsr.n;
case COND_PL: return !cpsr.n;
case COND_VS: return cpsr.v;
case COND_VC: return !cpsr.v;
case COND_HI: return (cpsr.c && !cpsr.z);
case COND_LS: return !(cpsr.c && !cpsr.z);
case COND_GE: return !(cpsr.n ^ cpsr.v);
case COND_LT: return (cpsr.n ^ cpsr.v);
case COND_GT: return !(cpsr.n ^ cpsr.v || cpsr.z);
case COND_LE: return (cpsr.n ^ cpsr.v || cpsr.z);
case COND_AL: return true;
case COND_NV: return false;
default:
panic("Unhandled predicate condition: %d\n", code);
}
}
//Floating Point Utility Functions
uint64_t fpConvert(ConvertType cvt_type, double fp_val);
double roundFP(double val, int digits);
double truncFP(double val);
bool getCondCode(uint32_t fcsr, int cc);
uint32_t genCCVector(uint32_t fcsr, int num, uint32_t cc_val);
uint32_t genInvalidVector(uint32_t fcsr);
bool isNan(void *val_ptr, int size);
bool isQnan(void *val_ptr, int size);
bool isSnan(void *val_ptr, int size);
/**
* Function to insure ISA semantics about 0 registers.
* @param tc The thread context.
*/
template <class TC>
void zeroRegisters(TC *tc);
// Instruction address compression hooks
static inline Addr realPCToFetchPC(const Addr &addr) {
return addr;
}
static inline Addr fetchPCToRealPC(const Addr &addr) {
return addr;
}
// the size of "fetched" instructions
static inline size_t fetchInstSize() {
return sizeof(MachInst);
}
static inline MachInst makeRegisterCopy(int dest, int src) {
panic("makeRegisterCopy not implemented");
return 0;
}
inline void startupCPU(ThreadContext *tc, int cpuId)
{
tc->activate(0);
}
};
#endif
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