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Code Issues Releases Wiki Activity

-Partial Implementation of Floating-Point Status and Control Register (FPSCR)

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This commit is contained in:
Magn3s1um 2013-11-09 07:41:56 -08:00
parent 3c762750a0
commit 1192d20295
4 changed files with 108 additions and 8 deletions
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2
rpcs3/Emu/Cell/SPUDisAsm.h
View File

@ -428,7 +428,7 @@ private:
{
DisAsm("sumb", spu_reg_name[rt], spu_reg_name[ra], spu_reg_name[rb]);
}
void HGT(u32 rt, u32 ra, u32 rb)
void HGT(u32 rt, s32 ra, s32 rb)
{
DisAsm("hgt", spu_reg_name[rt], spu_reg_name[ra], spu_reg_name[rb]);
}

28
rpcs3/Emu/Cell/SPUInterpreter.h
View File

@ -45,7 +45,7 @@ private:
void MFSPR(u32 rt, u32 sa)
{
//If register is a dummy register (register labeled 0x0)
if(sa == 0)
if(sa == 0x0)
{
CPU.GPR[rt]._u128.hi = 0x0;
CPU.GPR[rt]._u128.lo = 0x0;
@ -260,7 +260,11 @@ private:
}
void MTSPR(u32 rt, u32 sa)
{
UNIMPLEMENTED();
if(sa != 0)
{
CPU.SPR[sa]._u128.hi = CPU.GPR[rt]._u128.hi;
CPU.SPR[sa]._u128.lo = CPU.GPR[rt]._u128.lo;
}
}
void WRCH(u32 ra, u32 rt)
{
@ -307,7 +311,7 @@ private:
void IRET(u32 ra)
{
UNIMPLEMENTED();
// SetBranch(SRR0);
//SetBranch(SRR0);
}
void BISLED(u32 rt, u32 ra)
{
@ -628,9 +632,13 @@ private:
CPU.GPR[rt]._u16[w*2 + 1] = CPU.GPR[rb]._u8[w*4] + CPU.GPR[rb]._u8[w*4 + 1] + CPU.GPR[rb]._u8[w*4 + 2] + CPU.GPR[rb]._u8[w*4 + 3];
}
}
void HGT(u32 rt, u32 ra, u32 rb)
//HGT uses signed values. HLGT uses unsigned values
void HGT(u32 rt, s32 ra, s32 rb)
{
UNIMPLEMENTED();
if(CPU.GPR[ra]._i32[0] > CPU.GPR[rb]._i32[0])
{
CPU.Stop();
}
}
void CLZ(u32 rt, u32 ra)
{
@ -757,7 +765,10 @@ private:
}
void HLGT(u32 rt, u32 ra, u32 rb)
{
UNIMPLEMENTED();
if(CPU.GPR[ra]._u32[0] > CPU.GPR[rb]._u32[0])
{
CPU.Stop();
}
}
void DFMA(u32 rt, u32 ra, u32 rb)
{
@ -824,8 +835,13 @@ private:
for (int w = 0; w < 4; w++)
CPU.GPR[rt]._u32[w] += CPU.GPR[ra]._u16[w*2] * CPU.GPR[rb]._u16[w*2];
}
//Forced bits to 0, hence the shift:
void FSCRRD(u32 rt)
{
/*CPU.GPR[rt]._u128.lo =
CPU.FPSCR.Exception0 << 20 &
CPU.FPSCR.*/
UNIMPLEMENTED();
}
void FESD(u32 rt, u32 ra)

2
rpcs3/Emu/Cell/SPUOpcodes.h
View File

@ -323,7 +323,7 @@ public:
virtual void EQV(u32 rt, u32 ra, u32 rb) = 0;
virtual void CGTB(u32 rt, u32 ra, u32 rb) = 0;
virtual void SUMB(u32 rt, u32 ra, u32 rb) = 0;
virtual void HGT(u32 rt, u32 ra, u32 rb) = 0;
virtual void HGT(u32 rt, s32 ra, s32 rb) = 0;
virtual void CLZ(u32 rt, u32 ra) = 0;
virtual void XSWD(u32 rt, u32 ra) = 0;
virtual void XSHW(u32 rt, u32 ra) = 0;

84
rpcs3/Emu/Cell/SPUThread.h
View File

@ -117,6 +117,89 @@ enum
SPU_STATUS_SINGLE_STEP = 0x10,
};
//Floating point status and control register. Unsure if this is one of the GPRs or SPRs
//Is 128 bits, but bits 0-19, 24-28, 32-49, 56-60, 64-81, 88-92, 96-115, 120-124 are unused
class FPSCR
{
public:
u64 low;
u64 hi;
FPSCR() {}
wxString ToString() const
{
return "FPSCR writer not yet implemented"; //wxString::Format("%08x%08x%08x%08x", _u32[3], _u32[2], _u32[1], _u32[0]);
}
void Reset()
{
memset(this, 0, sizeof(*this));
}
//slice -> 0 - 1 (4 slices total, only two have rounding)
//0 -> round even
//1 -> round towards zero (truncate)
//2 -> round towards positive inf
//3 -> round towards neg inf
void setSliceRounding(u8 slice, u8 roundTo)
{
u64 mask = roundTo;
switch(slice)
{
case 0:
mask = mask << 20;
break;
case 1:
mask = mask << 22;
break;
}
//rounding is located in the low end of the FPSCR
this->low = this->low & mask;
}
//Slice 0 or 1
u8 checkSliceRounding(u8 slice)
{
switch(slice)
{
case 0:
return this->low >> 20 & 0x3;
case 1:
return this->low >> 22 & 0x3;
}
}
//Single Precision Exception Flags (all 3 slices)
//slice -> slice number (0-3)
//exception: 1 -> Overflow 2 -> Underflow 4-> Diff (could be IE^3 non compliant)
void setSinglePrecisionExceptionFlags(u8 slice, u8 exception)
{
u64 mask = exception;
switch(slice)
{
case 0:
mask = mask << 29;
this->low = this->low & mask;
break;
case 1:
mask = mask << 61;
this->low = this->low & mask;
break;
case 2:
mask = mask << 29;
this->hi = this->hi & mask;
break;
case 3:
mask = mask << 61;
this->hi = this->hi & mask;
break;
}
}
};
union SPU_GPR_hdr
{
u128 _u128;
@ -169,6 +252,7 @@ class SPUThread : public PPCThread
public:
SPU_GPR_hdr GPR[128]; //General-Purpose Register
SPU_SPR_hdr SPR[128]; //Special-Purpose Registers
FPSCR FPSCR;
template<size_t _max_count>
class Channel