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Implemented FPU precision control for 32-bit non-Windows platforms.

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git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@272 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Maarten ter Huurne 2008-08-22 17:46:13 +00:00
parent 292120453e
commit 31c0bc4508
1 changed files with 14 additions and 2 deletions
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16
Source/Core/Core/Src/PowerPC/Interpreter/Interpreter.cpp
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@ -26,6 +26,11 @@
#include "../../Core.h"
#include "PowerPCDisasm.h"
#include "../../IPC_HLE/WII_IPC_HLE.h"
static const unsigned short FPU_PREC_24 = 0 << 8;
static const unsigned short FPU_PREC_53 = 2 << 8;
static const unsigned short FPU_PREC_64 = 3 << 8;
static const unsigned short FPU_PREC_MASK = 3 << 8;
// cpu register to keep the code readable
u32* CInterpreter::m_GPR = PowerPC::ppcState.gpr;
@ -50,11 +55,18 @@ void CInterpreter::RunTable63(UGeckoInstruction _inst) {m_opTable63[_inst.SUBOP1
void CInterpreter::sInit()
{
// Crash();
#ifdef _M_IX86
// sets the floating-point lib to 53-bit
// PowerPC has a 53bit floating pipeline only
// eg: sscanf is very sensitive
#ifdef _M_IX86
_control87(_PC_53, MCW_PC);
#ifdef _WIN32
_control87(_PC_53, MCW_PC);
#else
unsigned short mode;
asm ("fstcw %0" : : "m" (mode));
mode = (mode & ~FPU_PREC_MASK) | FPU_PREC_53;
asm ("fldcw %0" : : "m" (mode));
#endif
#else
//x64 doesn't need this - fpu is done with SSE
//but still - set any useful sse options here