diff options
Diffstat (limited to 'compiler/optimizing/code_generator_mips.h')
| -rw-r--r-- | compiler/optimizing/code_generator_mips.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/compiler/optimizing/code_generator_mips.h b/compiler/optimizing/code_generator_mips.h index 003998129e..956a466f9b 100644 --- a/compiler/optimizing/code_generator_mips.h +++ b/compiler/optimizing/code_generator_mips.h @@ -218,6 +218,14 @@ class InstructionCodeGeneratorMIPS : public InstructionCodeGenerator { MipsAssembler* GetAssembler() const { return assembler_; } + // Compare-and-jump packed switch generates approx. 3 + 2.5 * N 32-bit + // instructions for N cases. + // Table-based packed switch generates approx. 11 32-bit instructions + // and N 32-bit data words for N cases. + // At N = 6 they come out as 18 and 17 32-bit words respectively. + // We switch to the table-based method starting with 7 cases. + static constexpr uint32_t kPackedSwitchJumpTableThreshold = 6; + private: void GenerateClassInitializationCheck(SlowPathCodeMIPS* slow_path, Register class_reg); void GenerateMemoryBarrier(MemBarrierKind kind); @@ -262,6 +270,17 @@ class InstructionCodeGeneratorMIPS : public InstructionCodeGenerator { void GenerateDivRemIntegral(HBinaryOperation* instruction); void HandleGoto(HInstruction* got, HBasicBlock* successor); auto GetImplicitNullChecker(HInstruction* instruction); + void GenPackedSwitchWithCompares(Register value_reg, + int32_t lower_bound, + uint32_t num_entries, + HBasicBlock* switch_block, + HBasicBlock* default_block); + void GenTableBasedPackedSwitch(Register value_reg, + Register constant_area, + int32_t lower_bound, + uint32_t num_entries, + HBasicBlock* switch_block, + HBasicBlock* default_block); MipsAssembler* const assembler_; CodeGeneratorMIPS* const codegen_; |