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Now tracking constant values for most operations.

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This will make it easier to enable memory access optimizations and hacks.
Not all operations are updating the constant registers, only those that
are likely to participate in constant value building. Constant values are
cleared on every basic block, though this may be too zealous it prevents
weird fall-through cases.
This commit is contained in:
Ben Vanik
2013-05-30 22:50:32 -07:00
parent 7990146001
commit 78086684c6
5 changed files with 281 additions and 5 deletions
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11
src/xenia/cpu/x64/x64_emitter.h
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@@ -58,6 +58,11 @@ public:
void FillRegisters();
void SpillRegisters();
bool get_constant_gpr_value(uint32_t n, uint64_t* value);
void set_constant_gpr_value(uint32_t n, uint64_t value);
void clear_constant_gpr_value(uint32_t n);
void clear_all_constant_gpr_values();
AsmJit::GpVar xer_value();
void update_xer_value(AsmJit::GpVar& value);
void update_xer_with_overflow(AsmJit::GpVar& value);
@@ -124,7 +129,11 @@ private:
std::map<uint32_t, AsmJit::Label> bbs_;
ppc::InstrAccessBits access_bits_;
ppc::InstrAccessBits access_bits_;
struct {
bool is_constant;
uint64_t value;
} gpr_values_[32];
struct {
AsmJit::GpVar indirection_target;
AsmJit::GpVar indirection_cia;