The-Homebrew-Cloud/dolphin
2
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2025-01-09 15:49:25 +01:00
Code Issues Packages Projects Releases Wiki Activity

Save/restore SSE flags through protected function calls.

Browse Source 
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@247 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard 2008-08-20 18:28:21 +00:00
parent b5ff3fd80e
commit bab47b610d
1 changed files with 7 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
Source/Core/Common/Src/Thunk.cpp
View File

@ -31,13 +31,13 @@ namespace {
static std::map<void *, const u8 *> thunks; static std::map<void *, const u8 *> thunks;
u8 GC_ALIGNED32(saved_fp_state[16 * 4 * 4]); u8 GC_ALIGNED32(saved_fp_state[16 * 4 * 4]);
u8 GC_ALIGNED32(saved_gpr_state[16 * 8]); u8 GC_ALIGNED32(saved_gpr_state[16 * 8]);
}
static u8 *thunk_memory; static u8 *thunk_memory;
static u8 *thunk_code; static u8 *thunk_code;
static const u8 *save_regs; static const u8 *save_regs;
static const u8 *load_regs; static const u8 *load_regs;
u32 saved_return; static u16 saved_mxcsr;
}
void Thunk_Init() void Thunk_Init()
{ {
@ -48,6 +48,7 @@ void Thunk_Init()
save_regs = GetCodePtr(); save_regs = GetCodePtr();
for (int i = 2; i < ABI_GetNumXMMRegs(); i++) for (int i = 2; i < ABI_GetNumXMMRegs(); i++)
MOVAPS(M(saved_fp_state + i * 16), (X64Reg)(XMM0 + i)); MOVAPS(M(saved_fp_state + i * 16), (X64Reg)(XMM0 + i));
STMXCSR(M(&saved_mxcsr));
#ifdef _M_X64 #ifdef _M_X64
MOV(64, M(saved_gpr_state + 0 ), R(RCX)); MOV(64, M(saved_gpr_state + 0 ), R(RCX));
MOV(64, M(saved_gpr_state + 8 ), R(RDX)); MOV(64, M(saved_gpr_state + 8 ), R(RDX));
@ -66,6 +67,7 @@ void Thunk_Init()
#endif #endif
RET(); RET();
load_regs = GetCodePtr(); load_regs = GetCodePtr();
LDMXCSR(M(&saved_mxcsr));
for (int i = 2; i < ABI_GetNumXMMRegs(); i++) for (int i = 2; i < ABI_GetNumXMMRegs(); i++)
MOVAPS((X64Reg)(XMM0 + i), M(saved_fp_state + i * 16)); MOVAPS((X64Reg)(XMM0 + i), M(saved_fp_state + i * 16));
#ifdef _M_X64 #ifdef _M_X64
@ -131,7 +133,9 @@ void *ProtectFunction(void *function, int num_params)
RET(); RET();
#else #else
CALL((void*)save_regs); CALL((void*)save_regs);
// Re-push parameters from previous stack frame // Since parameters are in the previous stack frame, not in registers, this takes some
// trickery : we simply re-push the parameters. might not be optimal, but that doesn't really
// matter.
for (int i = 0; i < num_params; i++) { for (int i = 0; i < num_params; i++) {
// ESP is changing, so we do not need i // ESP is changing, so we do not need i
PUSH(32, MDisp(ESP, (num_params) * 4)); PUSH(32, MDisp(ESP, (num_params) * 4));