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LibX86: Don't build_opcode_table_if_needed() every instruction decode

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Instead, just do this once at startup. :^)
This commit is contained in:
Andreas Kling 2020-07-13 20:42:37 +02:00
parent 2f81c20002
commit 7ea36f5ed0
2 changed files with 1 additions and 10 deletions
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8
Libraries/LibX86/Instruction.cpp
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@ -257,12 +257,8 @@ static void build_0f_slash(u8 op, u8 slash, const char* mnemonic, InstructionFor
build_slash(s_0f_table32, op, slash, mnemonic, format, impl, lock_prefix_allowed);
}
void Instruction::build_opcode_tables_if_needed()
[[gnu::constructor]] static void build_opcode_tables()
{
static bool has_built_tables = false;
if (has_built_tables)
return;
build(0x00, "ADD", OP_RM8_reg8, &Interpreter::ADD_RM8_reg8, LockPrefixAllowed);
build(0x01, "ADD", OP_RM16_reg16, &Interpreter::ADD_RM16_reg16, OP_RM32_reg32, &Interpreter::ADD_RM32_reg32, LockPrefixAllowed);
build(0x02, "ADD", OP_reg8_RM8, &Interpreter::ADD_reg8_RM8, LockPrefixAllowed);
@ -706,8 +702,6 @@ void Instruction::build_opcode_tables_if_needed()
build_0f(0xFD, "PADDW", OP_mm1_mm2m64, &Interpreter::PADDW_mm1_mm2m64);
build_0f(0xFE, "PADDD", OP_mm1_mm2m64, &Interpreter::PADDD_mm1_mm2m64);
build_0f(0xFF, "UD0", OP, &Interpreter::UD0);
has_built_tables = true;
}
static const char* register_name(RegisterIndex8);