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31 #ifndef __ARCH_SPARC_PREDECODER_HH__
32 #define __ARCH_SPARC_PREDECODER_HH__
34 #include "arch/sparc/registers.hh"
35 #include "arch/sparc/types.hh"
36 #include "base/bitfield.hh"
37 #include "base/misc.hh"
38 #include "base/types.hh"
39 #include "cpu/thread_context.hh"
50 // The extended machine instruction being generated
55 Predecoder(ThreadContext * _tc) : tc(_tc), emiIsReady(false)
65 setTC(ThreadContext * _tc)
78 // Use this to give data to the predecoder. This should be used
79 // when there is control flow.
81 moreBytes(const PCState &pc, Addr fetchPC, MachInst inst)
84 // The I bit, bit 13, is used to figure out where the ASI
85 // should come from. Use that in the ExtMachInst. This is
86 // slightly redundant, but it removes the need to put a condition
87 // into all the execute functions
88 if (inst & (1 << 13)) {
89 emi |= (static_cast<ExtMachInst>(
90 tc->readMiscRegNoEffect(MISCREG_ASI))
91 << (sizeof(MachInst) * 8));
93 emi |= (static_cast<ExtMachInst>(bits(inst, 12, 5))
94 << (sizeof(MachInst) * 8));
111 // This returns a constant reference to the ExtMachInst to avoid a copy
113 getExtMachInst(PCState &pcState)
121 #endif // __ARCH_SPARC_PREDECODER_HH__