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Interpreter: turn SNaNs into QNaNs

This commit is contained in:
Tillmann Karras 2015-06-25 05:25:17 +02:00
parent b78310bbe5
commit 2711d5201b
1 changed files with 23 additions and 16 deletions
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39
Source/Core/Core/PowerPC/Interpreter/Interpreter_FPUtils.h
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@ -76,6 +76,13 @@ inline double Force25Bit(double d)
return x.d; return x.d;
} }
inline double MakeQuiet(double d)
{
MathUtil::IntDouble x(d);
x.i |= MathUtil::DOUBLE_QBIT;
return x.d;
}
// these functions allow globally modify operations behaviour // these functions allow globally modify operations behaviour
// also, these may be used to set flags like FR, FI, OX, UX // also, these may be used to set flags like FR, FI, OX, UX
@ -84,8 +91,8 @@ inline double NI_mul(double a, double b)
double t = a * b; double t = a * b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(a)) return a; if (std::isnan(a)) return MakeQuiet(a);
if (std::isnan(b)) return b; if (std::isnan(b)) return MakeQuiet(b);
SetFPException(FPSCR_VXIMZ); SetFPException(FPSCR_VXIMZ);
return PPC_NAN; return PPC_NAN;
} }
@ -97,8 +104,8 @@ inline double NI_div(double a, double b)
double t = a / b; double t = a / b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(a)) return a; if (std::isnan(a)) return MakeQuiet(a);
if (std::isnan(b)) return b; if (std::isnan(b)) return MakeQuiet(b);
if (b == 0.0) if (b == 0.0)
{ {
SetFPException(FPSCR_ZX); SetFPException(FPSCR_ZX);
@ -119,8 +126,8 @@ inline double NI_add(double a, double b)
double t = a + b; double t = a + b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(a)) return a; if (std::isnan(a)) return MakeQuiet(a);
if (std::isnan(b)) return b; if (std::isnan(b)) return MakeQuiet(b);
SetFPException(FPSCR_VXISI); SetFPException(FPSCR_VXISI);
return PPC_NAN; return PPC_NAN;
} }
@ -132,8 +139,8 @@ inline double NI_sub(double a, double b)
double t = a - b; double t = a - b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(a)) return a; if (std::isnan(a)) return MakeQuiet(a);
if (std::isnan(b)) return b; if (std::isnan(b)) return MakeQuiet(b);
SetFPException(FPSCR_VXISI); SetFPException(FPSCR_VXISI);
return PPC_NAN; return PPC_NAN;
} }
@ -148,16 +155,16 @@ inline double NI_madd(double a, double c, double b, bool negate = false)
double t = a * c; double t = a * c;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(a)) return a; if (std::isnan(a)) return MakeQuiet(a);
if (std::isnan(b)) return b; // ! if (std::isnan(b)) return MakeQuiet(b); // !
if (std::isnan(c)) return c; if (std::isnan(c)) return MakeQuiet(c);
SetFPException(FPSCR_VXIMZ); SetFPException(FPSCR_VXIMZ);
return PPC_NAN; return PPC_NAN;
} }
t += b; t += b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(b)) return b; if (std::isnan(b)) return MakeQuiet(b);
SetFPException(FPSCR_VXISI); SetFPException(FPSCR_VXISI);
return PPC_NAN; return PPC_NAN;
} }
@ -169,9 +176,9 @@ inline double NI_msub(double a, double c, double b, bool negate = false)
double t = a * c; double t = a * c;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(a)) return a; if (std::isnan(a)) return MakeQuiet(a);
if (std::isnan(b)) return b; // ! if (std::isnan(b)) return MakeQuiet(b); // !
if (std::isnan(c)) return c; if (std::isnan(c)) return MakeQuiet(c);
SetFPException(FPSCR_VXIMZ); SetFPException(FPSCR_VXIMZ);
return PPC_NAN; return PPC_NAN;
} }
@ -179,7 +186,7 @@ inline double NI_msub(double a, double c, double b, bool negate = false)
t -= b; t -= b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (std::isnan(b)) return b; if (std::isnan(b)) return MakeQuiet(b);
SetFPException(FPSCR_VXISI); SetFPException(FPSCR_VXISI);
return PPC_NAN; return PPC_NAN;
} }