multi.isa revision 4278:4233cadbe3c3 
1// -*- mode:c++ -*-
2
3// Copyright (c) 2007 The Hewlett-Packard Development Company
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56// Authors: Gabe Black
57
58////////////////////////////////////////////////////////////////////
59//
60// Instructions that do the same thing to multiple sets of arguments.
61//
62
63output header {{
64}};
65
66output decoder {{
67}};
68
69output exec {{
70}};
71
72let {{
73    multiops = {}
74}};
75
76def format MultiOp(code, switchVal, opTags, *opt_flags) {{
77    # Loads and stores that bring in and write out values from the
78    # instructions. These are determined by the input and output tags,
79    # and the resulting instruction will have the right number of micro ops,
80    # or could be implemented as an atomic macro op.
81    instNames = []
82    for tagSet in opTags:
83        loads = []
84        stores = []
85        postfix = ''
86        for tag in tagSet:
87            postfix += '_' + tag
88        gather_inputs = ''
89        if len(loads) + len(stores) == 0:
90            # If there are no loads or stores, make this a single instruction.
91            iop = InstObjParams(name, Name + postfix, 'X86StaticInst',
92                    {"code": code, "gather_inputs": gather_inputs},
93                    opt_flags)
94        else:
95            # Build up a macro op. We'll punt on this for now
96            pass
97
98    decodeBlob = 'switch(%s) {\n' % switchVal
99    counter = 0
100    for inst in instNames:
101        decodeBlob += '%d: return (X86StaticInst *)(new %s(machInst));\n' % \
102                      (counter, inst)
103        counter += 1
104    decodeBlob += '}\n'
105    # decode_block = BasicDecodeWithMnemonic.subst(iop)
106}};
107