utility.hh revision 2972:f84c6c5309ce 
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 "arch/mips/isa_traits.hh"
37#include "base/misc.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
42namespace MipsISA {
43
44    //Floating Point Utility Functions
45    uint64_t fpConvert(ConvertType cvt_type, double fp_val);
46    double roundFP(double val, int digits);
47    double truncFP(double val);
48
49    bool getCondCode(uint32_t fcsr, int cc);
50    uint32_t genCCVector(uint32_t fcsr, int num, uint32_t cc_val);
51    uint32_t genInvalidVector(uint32_t fcsr);
52
53    bool isNan(void *val_ptr, int size);
54    bool isQnan(void *val_ptr, int size);
55    bool isSnan(void *val_ptr, int size);
56
57    /**
58     * Function to insure ISA semantics about 0 registers.
59     * @param tc The thread context.
60     */
61    template <class TC>
62    void zeroRegisters(TC *tc);
63
64    void copyRegs(ThreadContext *src, ThreadContext *dest);
65
66    // Instruction address compression hooks
67    static inline Addr realPCToFetchPC(const Addr &addr) {
68        return addr;
69    }
70
71    static inline Addr fetchPCToRealPC(const Addr &addr) {
72        return addr;
73    }
74
75    // the size of "fetched" instructions (not necessarily the size
76    // of real instructions for PISA)
77    static inline size_t fetchInstSize() {
78        return sizeof(MachInst);
79    }
80
81    static inline MachInst makeRegisterCopy(int dest, int src) {
82        panic("makeRegisterCopy not implemented");
83        return 0;
84    }
85
86    static inline ExtMachInst
87    makeExtMI(MachInst inst, const uint64_t &pc) {
88#if FULL_SYSTEM
89        ExtMachInst ext_inst = inst;
90        if (pc && 0x1)
91            return ext_inst|=(static_cast<ExtMachInst>(pc & 0x1) << 32);
92        else
93            return ext_inst;
94#else
95        return ExtMachInst(inst);
96#endif
97    }
98};
99
100
101#endif
102