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Optimization: Implement Return Stack Buffer

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This commit is contained in:
MerryMage
2016-08-13 00:10:23 +01:00
parent 8e68e6fdd9
commit 960d14d18e
18 changed files with 167 additions and 31 deletions
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20
src/backend_x64/block_of_code.cpp
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@@ -15,7 +15,7 @@ using namespace Gen;
namespace Dynarmic {
namespace BackendX64 {
BlockOfCode::BlockOfCode() {
BlockOfCode::BlockOfCode() : Gen::XCodeBlock() {
AllocCodeSpace(128 * 1024 * 1024);
ClearCache(false);
}
@@ -29,6 +29,7 @@ void BlockOfCode::ClearCache(bool poison_memory) {
GenConstants();
GenRunCode();
GenReturnFromRunCode();
}
size_t BlockOfCode::RunCode(JitState* jit_state, CodePtr basic_block, size_t cycles_to_run) const {
@@ -41,11 +42,7 @@ size_t BlockOfCode::RunCode(JitState* jit_state, CodePtr basic_block, size_t cyc
}
void BlockOfCode::ReturnFromRunCode(bool MXCSR_switch) {
if (MXCSR_switch)
SwitchMxcsrOnExit();
ABI_PopRegistersAndAdjustStack(ABI_ALL_CALLEE_SAVED, 8);
RET();
JMP(MXCSR_switch ? return_from_run_code : return_from_run_code_without_mxcsr_switch, true);
}
void BlockOfCode::GenConstants() {
@@ -80,6 +77,17 @@ void BlockOfCode::GenRunCode() {
JMPptr(R(ABI_PARAM2));
}
void BlockOfCode::GenReturnFromRunCode() {
return_from_run_code = GetCodePtr();
SwitchMxcsrOnExit();
return_from_run_code_without_mxcsr_switch = GetCodePtr();
ABI_PopRegistersAndAdjustStack(ABI_ALL_CALLEE_SAVED, 8);
RET();
}
void BlockOfCode::SwitchMxcsrOnEntry() {
STMXCSR(MDisp(R15, offsetof(JitState, save_host_MXCSR)));
LDMXCSR(MDisp(R15, offsetof(JitState, guest_MXCSR)));