1// Copyright (c) 2006-2007 The Regents of The University of Michigan
2// All rights reserved.
3//
4// Redistribution and use in source and binary forms, with or without
5// modification, are permitted provided that the following conditions are
6// met: redistributions of source code must retain the above copyright
7// notice, this list of conditions and the following disclaimer;
8// redistributions in binary form must reproduce the above copyright
9// notice, this list of conditions and the following disclaimer in the
10// documentation and/or other materials provided with the distribution;
11// neither the name of the copyright holders nor the names of its
12// contributors may be used to endorse or promote products derived from
13// this software without specific prior written permission.
14//
15// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26//
27// Authors: Ali Saidi
28//          Gabe Black
29//          Steve Reinhardt
30
31def template ROrImmDecode {{
32    {
33        return (I ? (SparcStaticInst *)(new %(class_name)sImm(machInst))
34                  : (SparcStaticInst *)(new %(class_name)s(machInst)));
35    }
36}};
37
38output header {{
39    union DoubleSingle
40    {
41        double d;
42        uint64_t ui;
43        uint32_t s[2];
44        DoubleSingle(double _d) : d(_d)
45        {}
46        DoubleSingle(uint64_t _ui) : ui(_ui)
47        {}
48        DoubleSingle(uint32_t _s0, uint32_t _s1)
49        {
50            s[0] = _s0;
51            s[1] = _s1;
52        }
53    };
54}};
55
56let {{
57    def filterDoubles(code):
58        assignRE = re.compile(r'\s*=(?!=)', re.MULTILINE)
59        for opName in ("Frd", "Frs1", "Frs2", "Frd_N"):
60            next_pos = 0
61            operandsREString = (r'''
62            (?<!\w)             # neg. lookbehind assertion: prevent partial matches
63            ((%s)(?:_([^\W_]+))?)   # match: operand with optional '.' then suffix
64            (?!\w)             # neg. lookahead assertion: prevent partial matches
65            ''' % opName)
66            operandsRE = re.compile(operandsREString, re.MULTILINE|re.VERBOSE)
67            is_src = False
68            is_dest = False
69            extension = None
70            foundOne = False
71            while 1:
72                match = operandsRE.search(code, next_pos)
73                if not match:
74                    break
75                foundOne = True
76                op = match.groups()
77                (op_full, op_base, op_ext) = op
78                is_dest_local = (assignRE.match(code, match.end()) != None)
79                is_dest = is_dest or is_dest_local
80                is_src = is_src or not is_dest_local
81                if extension and extension != op_ext:
82                    raise Exception, "Inconsistent extensions in double filter."
83                extension = op_ext
84                next_pos = match.end()
85            if foundOne:
86                # Get rid of any unwanted extension
87                code = operandsRE.sub(op_base, code)
88                is_int = False
89                member = "d"
90                if extension in ("sb", "ub", "shw", "uhw", "sw", "uw", "sdw", "udw"):
91                    is_int = True
92                    member = "ui"
93                if is_src:
94                    code = ("%s = DoubleSingle(%s_high, %s_low).%s;" % \
95                        (opName, opName, opName, member)) + code
96                if is_dest:
97                    code += '''
98                        %s_low = DoubleSingle(%s).s[1];
99                        %s_high = DoubleSingle(%s).s[0];''' % \
100                             (opName, opName, opName, opName)
101                if is_int:
102                    code = ("uint64_t %s;" % opName) + code
103                else:
104                    code = ("double %s;" % opName) + code
105        return code
106}};
107
108let {{
109    def splitOutImm(code):
110        matcher = re.compile(r'Rs(?P<rNum>\d)_or_imm(?P<iNum>\d+)(?P<typeQual>_[^\W_]+)?')
111        rOrImmMatch = matcher.search(code)
112        if (rOrImmMatch == None):
113            return (False, code, '', '', '')
114        rString = rOrImmMatch.group("rNum")
115        if (rOrImmMatch.group("typeQual") != None):
116            rString += rOrImmMatch.group("typeQual")
117        iString = rOrImmMatch.group("iNum")
118        orig_code = code
119        code = matcher.sub('Rs' + rString, orig_code)
120        imm_code = matcher.sub('imm', orig_code)
121        return (True, code, imm_code, rString, iString)
122}};
123
124output exec {{
125    /// Check "FP enabled" machine status bit.  Called when executing any FP
126    /// instruction.
127    /// @retval Full-system mode: NoFault if FP is enabled, FpDisabled
128    /// if not.  Non-full-system mode: always returns NoFault.
129    static inline Fault
130    checkFpEnableFault(ExecContext *xc)
131    {
132        if (FullSystem) {
133            PSTATE pstate = xc->readMiscReg(MISCREG_PSTATE);
134            if (pstate.pef && xc->readMiscReg(MISCREG_FPRS) & 0x4) {
135                return NoFault;
136            } else {
137                return std::make_shared<FpDisabled>();
138            }
139        } else {
140            return NoFault;
141        }
142    }
143
144    static inline Fault
145    checkVecEnableFault(ExecContext *xc)
146    {
147        return std::make_shared<VecDisabled>();
148    }
149}};
150
151
152