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macro_jit_x64: Select better registers

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All registers are now callee-save registers.

RBX and RBP selected for STATE and RESULT because these are most commonly accessed; this is to avoid the REX prefix.
RBP not used for STATE because there are some SIB restrictions, RBX emits smaller code.
This commit is contained in:
MerryMage
2020-06-15 21:12:53 +01:00
parent 79aa7b3ace
commit c09a9e5cc7
1 changed files with 8 additions and 8 deletions
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16
src/video_core/macro/macro_jit_x64.cpp
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@@ -14,18 +14,18 @@ MICROPROFILE_DEFINE(MacroJitCompile, "GPU", "Compile macro JIT", MP_RGB(173, 255
MICROPROFILE_DEFINE(MacroJitExecute, "GPU", "Execute macro JIT", MP_RGB(255, 255, 0));
namespace Tegra {
static const Xbyak::Reg64 PARAMETERS = Xbyak::util::r9;
static const Xbyak::Reg64 STATE = Xbyak::util::r11;
static const Xbyak::Reg64 NEXT_PARAMETER = Xbyak::util::r12;
static const Xbyak::Reg32 RESULT = Xbyak::util::r13d;
static const Xbyak::Reg64 STATE = Xbyak::util::rbx;
static const Xbyak::Reg32 RESULT = Xbyak::util::ebp;
static const Xbyak::Reg64 PARAMETERS = Xbyak::util::r12;
static const Xbyak::Reg64 NEXT_PARAMETER = Xbyak::util::r13;
static const Xbyak::Reg32 METHOD_ADDRESS = Xbyak::util::r14d;
static const Xbyak::Reg64 BRANCH_HOLDER = Xbyak::util::r15;
static const std::bitset<32> PERSISTENT_REGISTERS = Common::X64::BuildRegSet({
PARAMETERS,
STATE,
NEXT_PARAMETER,
RESULT,
PARAMETERS,
NEXT_PARAMETER,
METHOD_ADDRESS,
BRANCH_HOLDER,
});
@@ -64,13 +64,13 @@ void MacroJITx64Impl::Compile_ALU(Macro::Opcode opcode) {
if (!optimizer.zero_reg_skip) {
src_a = Compile_GetRegister(opcode.src_a, RESULT);
src_b = Compile_GetRegister(opcode.src_b, ebx);
src_b = Compile_GetRegister(opcode.src_b, eax);
} else {
if (!is_a_zero) {
src_a = Compile_GetRegister(opcode.src_a, RESULT);
}
if (!is_b_zero) {
src_b = Compile_GetRegister(opcode.src_b, ebx);
src_b = Compile_GetRegister(opcode.src_b, eax);
}
}
Xbyak::Label skip_carry{};