jdk8-mips64-public/hotspot: src/cpu/sparc/vm/registerMap

6985015: C1 needs to support compressed oops
Summary: This change implements compressed oops for C1 for x64 and sparc. The changes are mostly on the codegen level, with a few exceptions when we do access things outside of the heap that are uncompressed from the IR. Compressed oops are now also enabled with tiered.
Reviewed-by: twisti, kvn, never, phh

     1 /*

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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

src/cpu/sparc/vm/registerMap_sparc.hpp@ac637b7220d1

src/cpu/sparc/vm/registerMap_sparc.hpp

Mercurial > jdk8-mips64-public > hotspot / file revision

src/cpu/sparc/vm/registerMap_sparc.hpp@ac637b7220d1

src/cpu/sparc/vm/registerMap_sparc.hpp