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Merge pull request #7053 from lioncash/frfi 

Interpreter_FPUtils/FloatingPoint/Paired: Amend cases where FPSCR.FR and FPSCR.FI should be unset
This commit is contained in:
Léo Lam 2018-06-03 15:36:12 +02:00 committed by GitHub
parent 66ee47c417 3e63d71046
commit c22205cd7e
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 72 additions and 20 deletions
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6
Source/Core/Core/PowerPC/Gekko.h
View File

@ -476,6 +476,12 @@ union UReg_FPSCR
UReg_FPSCR() = default;
explicit UReg_FPSCR(u32 hex_) : Hex{hex_} {}
void ClearFIFR()
{
FI = 0;
FR = 0;
}
};
// Hardware Implementation-Dependent Register 0

36
Source/Core/Core/PowerPC/Interpreter/Interpreter_FPUtils.h
View File

@ -103,7 +103,10 @@ inline double NI_mul(double a, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(a) || Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(a))
return MakeQuiet(a);
@ -111,6 +114,7 @@ inline double NI_mul(double a, double b)
return MakeQuiet(b);
SetFPException(FPSCR_VXIMZ);
FPSCR.ClearFIFR();
return PPC_NAN;
}
return t;
@ -123,7 +127,10 @@ inline double NI_div(double a, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(a) || Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(a))
return MakeQuiet(a);
@ -135,17 +142,18 @@ inline double NI_div(double a, double b)
if (a == 0.0)
{
SetFPException(FPSCR_VXZDZ);
FPSCR.ClearFIFR();
}
else
{
SetFPException(FPSCR_ZX);
FPSCR.FI = 0;
FPSCR.FR = 0;
FPSCR.ClearFIFR();
}
}
else if (std::isinf(a) && std::isinf(b))
{
SetFPException(FPSCR_VXIDI);
FPSCR.ClearFIFR();
}
return PPC_NAN;
@ -161,7 +169,10 @@ inline double NI_add(double a, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(a) || Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(a))
return MakeQuiet(a);
@ -169,6 +180,7 @@ inline double NI_add(double a, double b)
return MakeQuiet(b);
SetFPException(FPSCR_VXISI);
FPSCR.ClearFIFR();
return PPC_NAN;
}
@ -182,7 +194,10 @@ inline double NI_sub(double a, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(a) || Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(a))
return MakeQuiet(a);
@ -190,6 +205,7 @@ inline double NI_sub(double a, double b)
return MakeQuiet(b);
SetFPException(FPSCR_VXISI);
FPSCR.ClearFIFR();
return PPC_NAN;
}
@ -206,7 +222,10 @@ inline double NI_madd(double a, double c, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(a) || Common::IsSNAN(b) || Common::IsSNAN(c))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(a))
return MakeQuiet(a);
@ -216,6 +235,7 @@ inline double NI_madd(double a, double c, double b)
return MakeQuiet(c);
SetFPException(FPSCR_VXIMZ);
FPSCR.ClearFIFR();
return PPC_NAN;
}
@ -224,12 +244,16 @@ inline double NI_madd(double a, double c, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(b))
return MakeQuiet(b);
SetFPException(FPSCR_VXISI);
FPSCR.ClearFIFR();
return PPC_NAN;
}
@ -243,7 +267,10 @@ inline double NI_msub(double a, double c, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(a) || Common::IsSNAN(b) || Common::IsSNAN(c))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(a))
return MakeQuiet(a);
@ -253,6 +280,7 @@ inline double NI_msub(double a, double c, double b)
return MakeQuiet(c);
SetFPException(FPSCR_VXIMZ);
FPSCR.ClearFIFR();
return PPC_NAN;
}
@ -261,12 +289,16 @@ inline double NI_msub(double a, double c, double b)
if (std::isnan(t))
{
if (Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
if (std::isnan(b))
return MakeQuiet(b);
SetFPException(FPSCR_VXISI);
FPSCR.ClearFIFR();
return PPC_NAN;
}

20
Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
View File

@ -92,8 +92,7 @@ void ConvertToInteger(UGeckoInstruction inst, RoundingMode rounding_mode)
const double di = i;
if (di == b)
{
FPSCR.FI = 0;
FPSCR.FR = 0;
FPSCR.ClearFIFR();
}
else
{
@ -105,8 +104,7 @@ void ConvertToInteger(UGeckoInstruction inst, RoundingMode rounding_mode)
if (exception_occurred)
{
FPSCR.FI = 0;
FPSCR.FR = 0;
FPSCR.ClearFIFR();
}
if (!exception_occurred || FPSCR.VE == 0)
@ -285,8 +283,7 @@ void Interpreter::frspx(UGeckoInstruction inst) // round to single
PowerPC::UpdateFPRF(b);
}
SetFI(0);
FPSCR.FR = 0;
FPSCR.ClearFIFR();
}
else
{
@ -397,6 +394,7 @@ void Interpreter::fresx(UGeckoInstruction inst)
if (b == 0.0)
{
SetFPException(FPSCR_ZX);
FPSCR.ClearFIFR();
if (FPSCR.ZE == 0)
compute_result(b);
@ -404,8 +402,7 @@ void Interpreter::fresx(UGeckoInstruction inst)
else if (Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.FI = 0;
FPSCR.FR = 0;
FPSCR.ClearFIFR();
if (FPSCR.VE == 0)
compute_result(b);
@ -432,8 +429,7 @@ void Interpreter::frsqrtex(UGeckoInstruction inst)
if (b < 0.0)
{
SetFPException(FPSCR_VXSQRT);
FPSCR.FI = 0;
FPSCR.FR = 0;
FPSCR.ClearFIFR();
if (FPSCR.VE == 0)
compute_result(b);
@ -441,6 +437,7 @@ void Interpreter::frsqrtex(UGeckoInstruction inst)
else if (b == 0.0)
{
SetFPException(FPSCR_ZX);
FPSCR.ClearFIFR();
if (FPSCR.ZE == 0)
compute_result(b);
@ -448,8 +445,7 @@ void Interpreter::frsqrtex(UGeckoInstruction inst)
else if (Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.FI = 0;
FPSCR.FR = 0;
FPSCR.ClearFIFR();
if (FPSCR.VE == 0)
compute_result(b);

30
Source/Core/Core/PowerPC/Interpreter/Interpreter_Paired.cpp
View File

@ -115,12 +115,19 @@ void Interpreter::ps_div(UGeckoInstruction inst)
void Interpreter::ps_res(UGeckoInstruction inst)
{
// this code is based on the real hardware tests
double a = rPS0(inst.FB);
double b = rPS1(inst.FB);
const double a = rPS0(inst.FB);
const double b = rPS1(inst.FB);
if (a == 0.0 || b == 0.0)
{
SetFPException(FPSCR_ZX);
FPSCR.ClearFIFR();
}
if (Common::IsSNAN(a) || Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
rPS0(inst.FD) = Common::ApproximateReciprocal(a);
@ -133,18 +140,29 @@ void Interpreter::ps_res(UGeckoInstruction inst)
void Interpreter::ps_rsqrte(UGeckoInstruction inst)
{
if (rPS0(inst.FB) == 0.0 || rPS1(inst.FB) == 0.0)
const double ps0 = rPS0(inst.FB);
const double ps1 = rPS1(inst.FB);
if (ps0 == 0.0 || ps1 == 0.0)
{
SetFPException(FPSCR_ZX);
FPSCR.ClearFIFR();
}
if (rPS0(inst.FB) < 0.0 || rPS1(inst.FB) < 0.0)
if (ps0 < 0.0 || ps1 < 0.0)
{
SetFPException(FPSCR_VXSQRT);
FPSCR.ClearFIFR();
}
rPS0(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(rPS0(inst.FB)));
rPS1(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(rPS1(inst.FB)));
if (Common::IsSNAN(ps0) || Common::IsSNAN(ps1))
{
SetFPException(FPSCR_VXSNAN);
FPSCR.ClearFIFR();
}
rPS0(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(ps0));
rPS1(inst.FD) = ForceSingle(Common::ApproximateReciprocalSquareRoot(ps1));
PowerPC::UpdateFPRF(rPS0(inst.FD));