summaryrefslogtreecommitdiff
path: root/src/arch/arm/utility.hh
blob: fedf1fa05566da025d685a0d038e63e2eee68677 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
/*
 * 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/types.hh"
#include "base/misc.hh"
#include "config/full_system.hh"
#include "cpu/thread_context.hh"
#include "sim/host.hh"

class ThreadContext;

namespace ArmISA {

    //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