Fri, 25 Mar 2011 09:35:39 +0100
7029017: Additional architecture support for c2 compiler
Summary: Enables cross building of a c2 VM. Support masking of shift counts when the processor architecture mandates it.
Reviewed-by: kvn, never
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25 #ifndef CPU_SPARC_VM_REGISTERMAP_SPARC_HPP
26 #define CPU_SPARC_VM_REGISTERMAP_SPARC_HPP
28 // machine-dependent implemention for register maps
29 friend class frame;
31 private:
32 intptr_t* _window; // register window save area (for L and I regs)
33 intptr_t* _younger_window; // previous save area (for O regs, if needed)
35 address pd_location(VMReg reg) const;
36 void pd_clear();
37 void pd_initialize_from(const RegisterMap* map) {
38 _window = map->_window;
39 _younger_window = map->_younger_window;
40 _location_valid[0] = 0; // avoid the shift_individual_registers game
41 }
42 void pd_initialize() {
43 _window = NULL;
44 _younger_window = NULL;
45 _location_valid[0] = 0; // avoid the shift_individual_registers game
46 }
47 void shift_window(intptr_t* sp, intptr_t* younger_sp) {
48 _window = sp;
49 _younger_window = younger_sp;
50 // Throw away locations for %i, %o, and %l registers:
51 // But do not throw away %g register locs.
52 if (_location_valid[0] != 0) shift_individual_registers();
53 }
54 void shift_individual_registers();
55 // When popping out of compiled frames, we make all IRegs disappear.
56 void make_integer_regs_unsaved() { _location_valid[0] = 0; }
58 #endif // CPU_SPARC_VM_REGISTERMAP_SPARC_HPP