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Interpreter_FPUtils: Set FPSCR.VXSNAN if either operand to NI_div is a signaling NaN 

If either operand is a signaling NaN, we need to signify that by setting
the VXSNAN bit.

This fixes NaN flag setting for fdiv, fdivs and ps_div instructions.
This commit is contained in:
Lioncash 2018-05-27 15:56:25 -04:00
parent e9ce75ccc4
commit f4c5ceba1c
1 changed files with 8 additions and 1 deletions
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9
Source/Core/Core/PowerPC/Interpreter/Interpreter_FPUtils.h
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@ -113,13 +113,18 @@ inline double NI_mul(double a, double b)
inline double NI_div(double a, double b) inline double NI_div(double a, double b)
{ {
double t = a / b; const double t = a / b;
if (std::isnan(t)) if (std::isnan(t))
{ {
if (Common::IsSNAN(a) || Common::IsSNAN(b))
SetFPException(FPSCR_VXSNAN);
if (std::isnan(a)) if (std::isnan(a))
return MakeQuiet(a); return MakeQuiet(a);
if (std::isnan(b)) if (std::isnan(b))
return MakeQuiet(b); return MakeQuiet(b);
if (b == 0.0) if (b == 0.0)
{ {
SetFPException(FPSCR_ZX); SetFPException(FPSCR_ZX);
@ -130,8 +135,10 @@ inline double NI_div(double a, double b)
{ {
SetFPException(FPSCR_VXIDI); SetFPException(FPSCR_VXIDI);
} }
return PPC_NAN; return PPC_NAN;
} }
return t; return t;
} }