utility.hh revision 2980:eab855f06b79 
1/*
2 * Copyright (c) 2003-2005 The Regents of The University of Michigan
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are
7 * met: redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer;
9 * redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution;
12 * neither the name of the copyright holders nor the names of its
13 * contributors may be used to endorse or promote products derived from
14 * this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 *
28 * Authors: Nathan Binkert
29 *          Steve Reinhardt
30 */
31
32#ifndef __ARCH_MIPS_UTILITY_HH__
33#define __ARCH_MIPS_UTILITY_HH__
34
35#include "arch/mips/types.hh"
36#include "base/misc.hh"
37#include "config/full_system.hh"
38//XXX This is needed for size_t. We should use something other than size_t
39//#include "kern/linux/linux.hh"
40#include "sim/host.hh"
41
42class ThreadContext;
43
44namespace MipsISA {
45
46    //Floating Point Utility Functions
47    uint64_t fpConvert(ConvertType cvt_type, double fp_val);
48    double roundFP(double val, int digits);
49    double truncFP(double val);
50
51    bool getCondCode(uint32_t fcsr, int cc);
52    uint32_t genCCVector(uint32_t fcsr, int num, uint32_t cc_val);
53    uint32_t genInvalidVector(uint32_t fcsr);
54
55    bool isNan(void *val_ptr, int size);
56    bool isQnan(void *val_ptr, int size);
57    bool isSnan(void *val_ptr, int size);
58
59    /**
60     * Function to insure ISA semantics about 0 registers.
61     * @param tc The thread context.
62     */
63    template <class TC>
64    void zeroRegisters(TC *tc);
65
66    void copyRegs(ThreadContext *src, ThreadContext *dest);
67
68    // Instruction address compression hooks
69    static inline Addr realPCToFetchPC(const Addr &addr) {
70        return addr;
71    }
72
73    static inline Addr fetchPCToRealPC(const Addr &addr) {
74        return addr;
75    }
76
77    // the size of "fetched" instructions (not necessarily the size
78    // of real instructions for PISA)
79    static inline size_t fetchInstSize() {
80        return sizeof(MachInst);
81    }
82
83    static inline MachInst makeRegisterCopy(int dest, int src) {
84        panic("makeRegisterCopy not implemented");
85        return 0;
86    }
87
88    static inline ExtMachInst
89    makeExtMI(MachInst inst, const uint64_t &pc) {
90#if FULL_SYSTEM
91        ExtMachInst ext_inst = inst;
92        if (pc && 0x1)
93            return ext_inst|=(static_cast<ExtMachInst>(pc & 0x1) << 32);
94        else
95            return ext_inst;
96#else
97        return ExtMachInst(inst);
98#endif
99    }
100};
101
102
103#endif
104