ShuriZma
/
dolphin
mirror of https://github.com/dolphin-emu/dolphin.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Merge pull request #6958 from lioncash/rsqrte 

Interpreter_FloatingPoint: Handle SNaN flag setting in frsqrte
This commit is contained in:
Léo Lam 2018-05-25 15:11:28 +02:00 committed by GitHub
parent 56217fd42f 155bcb1649
commit 3d44dc3981
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 20 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
Source/Core/Core/PowerPC/Interpreter/Interpreter_FloatingPoint.cpp
View File

@ -424,19 +424,36 @@ void Interpreter::fresx(UGeckoInstruction inst)
void Interpreter::frsqrtex(UGeckoInstruction inst) void Interpreter::frsqrtex(UGeckoInstruction inst)
{ {
double b = rPS0(inst.FB); const double b = rPS0(inst.FB);
const double result = Common::ApproximateReciprocalSquareRoot(b);
if (b < 0.0) if (b < 0.0)
{ {
SetFPException(FPSCR_VXSQRT); SetFPException(FPSCR_VXSQRT);
if (FPSCR.VE == 0)
PowerPC::UpdateFPRF(result);
} }
else if (b == 0.0) else if (b == 0.0)
{ {
SetFPException(FPSCR_ZX); SetFPException(FPSCR_ZX);
if (FPSCR.ZE == 0)
PowerPC::UpdateFPRF(result);
}
else if (Common::IsSNAN(b))
{
SetFPException(FPSCR_VXSNAN);
if (FPSCR.VE == 0)
PowerPC::UpdateFPRF(result);
}
else
{
PowerPC::UpdateFPRF(result);
} }
rPS0(inst.FD) = Common::ApproximateReciprocalSquareRoot(b); rPS0(inst.FD) = result;
PowerPC::UpdateFPRF(rPS0(inst.FD));
if (inst.Rc) if (inst.Rc)
Helper_UpdateCR1(); Helper_UpdateCR1();