dolphin-emu/dolphin
1
0
Fork 0
mirror of https://github.com/dolphin-emu/dolphin.git synced 2024-10-07 07:43:36 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Force the result of single precision arithmetic to have single precision only, also in jit. That is, another attempt at fixing the FPU bug in Zelda.

Browse Source 
git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@251 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
hrydgard 2008-08-20 23:25:48 +00:00
parent adafeaa8b4
commit 77cec36ad4
3 changed files with 23 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
Source/Core/Core/Src/PowerPC/Jit64/Jit_FloatingPoint.cpp
View File

@ -24,6 +24,7 @@
#include "Jit.h"
#include "JitCache.h"
#include "JitRegCache.h"
#include "Jit_Util.h"
#define INSTRUCTION_START
// #define INSTRUCTION_START Default(inst); return;
@ -70,9 +71,9 @@ namespace Jit64
MOVSD(fpr.RX(d), Gen::R(XMM0));
}
if (dupe) {
ForceSinglePrecisionS(fpr.RX(d));
MOVDDUP(fpr.RX(d), fpr.R(d));
}
//fpr.SetDirty(fpr.RX(d));
fpr.UnlockAll();
}
@ -106,6 +107,9 @@ namespace Jit64
if (inst.Rc) {
Default(inst); return;
}
bool single_precision = inst.OPCD == 59;
int a = inst.FA;
int b = inst.FB;
int c = inst.FC;
@ -137,7 +141,12 @@ namespace Jit64
fpr.LoadToX64(d, false);
//YES it is necessary to dupe the result :(
//TODO : analysis - does the top reg get used? If so, dupe, if not, don't.
MOVDDUP(fpr.RX(d), Gen::R(XMM0));
if (single_precision) {
ForceSinglePrecisionS(XMM0);
MOVDDUP(fpr.RX(d), R(XMM0));
} else {
MOVSD(fpr.RX(d), R(XMM0));
}
fpr.UnlockAll();
}

9
Source/Core/Core/Src/PowerPC/Jit64/Jit_Util.cpp
View File

@ -127,4 +127,13 @@ void WriteFloatToConstRamAddress(const Gen::X64Reg& xmm_reg, u32 address)
#endif
}
void ForceSinglePrecisionS(X64Reg xmm) {
CVTSD2SS(xmm, R(xmm));
CVTSS2SD(xmm, R(xmm));
}
void ForceSinglePrecisionP(X64Reg xmm) {
CVTPD2PS(xmm, R(xmm));
CVTPS2PD(xmm, R(xmm));
}
} // namespace

3
Source/Core/Core/Src/PowerPC/Jit64/Jit_Util.h
View File

@ -30,4 +30,7 @@ void SafeWriteRegToReg(Gen::X64Reg reg_value, Gen::X64Reg reg_addr, int accessSi
void WriteToConstRamAddress(int accessSize, const Gen::OpArg& arg, u32 address);
void WriteFloatToConstRamAddress(const Gen::X64Reg& xmm_reg, u32 address);
void ForceSinglePrecisionS(X64Reg xmm);
void ForceSinglePrecisionP(X64Reg xmm);
} // namespace