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Implement host FP exception checking for PPU floating-point instructions.

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This commit is contained in:
Andrew Church 2015-01-18 21:14:31 +09:00
parent 04902965fe
commit 3a87a40593
1 changed files with 26 additions and 1 deletions
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27
rpcs3/Emu/Cell/PPUInterpreter.h
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@ -81,6 +81,7 @@ static void SetHostRoundingMode(u32 rn)
}
}
namespace ppu_recompiler_llvm {
class Compiler;
}
@ -100,6 +101,13 @@ public:
}
private:
void CheckHostFPExceptions()
{
CPU.SetFPSCR_FI(fetestexcept(FE_INEXACT) != 0);
if (fetestexcept(FE_UNDERFLOW)) CPU.SetFPSCRException(FPSCR_UX);
if (fetestexcept(FE_OVERFLOW)) CPU.SetFPSCRException(FPSCR_OX);
}
void Exit() {}
void SysCall()
@ -3727,7 +3735,9 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
CPU.FPR[frd] = static_cast<float>(1.0 / b);
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
if(rc) CPU.UpdateCR1();
@ -3849,6 +3859,7 @@ private:
{
if (((u64&)b0 & DOUBLE_EXP) < 0x3800000000000000ULL) (u64&)b0 &= DOUBLE_SIGN;
}
feclearexcept(FE_ALL_EXCEPT);
const double r = static_cast<float>(b0);
if (FPRdouble::IsNaN(r))
{
@ -3858,7 +3869,7 @@ private:
else
{
CPU.FPSCR.FR = fabs(r) > fabs(b);
CPU.SetFPSCR_FI(b != r);
CheckHostFPExceptions();
}
u32 type = PPCdouble(r).GetType();
if (type == FPR_PN && r < ldexp(1.0, -126)) type = FPR_PD;
@ -3997,9 +4008,11 @@ private:
return;
}
}
feclearexcept(FE_ALL_EXCEPT);
const double res = a / b;
if(single) CPU.FPR[frd] = (float)res;
else CPU.FPR[frd] = res;
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
@ -4044,9 +4057,11 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
const double res = a - b;
if(single) CPU.FPR[frd] = (float)res;
else CPU.FPR[frd] = res;
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
if(rc) CPU.UpdateCR1();
@ -4090,9 +4105,11 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
const double res = a + b;
if(single) CPU.FPR[frd] = (float)res;
else CPU.FPR[frd] = res;
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
if(rc) CPU.UpdateCR1();
@ -4131,9 +4148,11 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
const double res = sqrt(b);
if(single) CPU.FPR[frd] = (float)res;
else CPU.FPR[frd] = res;
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
if(rc) CPU.UpdateCR1();
@ -4182,9 +4201,11 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
const double res = a * c;
if(single) CPU.FPR[frd] = (float)res;
else CPU.FPR[frd] = res;
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
if(rc) CPU.UpdateCR1();
@ -4234,7 +4255,9 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
CPU.FPR[frd] = 1.0 / sqrt(b);
CheckHostFPExceptions();
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();
if(rc) CPU.UpdateCR1();
@ -4299,8 +4322,10 @@ private:
}
else
{
feclearexcept(FE_ALL_EXCEPT);
if(single) CPU.FPR[frd] = (float)(neg ? -res : res);
else CPU.FPR[frd] = (neg ? -res : res);
CheckHostFPExceptions();
}
}
CPU.FPSCR.FPRF = CPU.FPR[frd].GetType();