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n64: Fix up how negative values are handled in VRSQL/VRCPL [MooglyGuy]

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This commit is contained in:
mooglyguy 2014-11-03 22:09:55 +01:00
parent af8b0eedcd
commit cc037b44f4
1 changed files with 55 additions and 91 deletions
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146
src/emu/cpu/rsp/rspdrc.c
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@ -6318,13 +6318,15 @@ inline void rsp_device::ccfunc_rsp_vrcpl_simd()
UINT16 urec;
SIMD_EXTRACT16(m_xv[VS2REG], urec, EL);
INT32 rec = (urec | m_reciprocal_high);
INT32 rec = (INT16)urec;
INT32 datainput = rec;
if (rec < 0)
if (m_dp_allowed)
{
if (m_dp_allowed)
rec = (rec & 0x0000ffff) | m_reciprocal_high;
datainput = rec;
if (rec < 0)
{
if (rec < -32768)
{
@ -6335,12 +6337,13 @@ inline void rsp_device::ccfunc_rsp_vrcpl_simd()
datainput = -datainput;
}
}
else
{
datainput = -datainput;
}
}
else if (datainput < 0)
{
datainput = -datainput;
shifter = 0x10;
}
if (datainput)
{
@ -6353,25 +6356,12 @@ inline void rsp_device::ccfunc_rsp_vrcpl_simd()
}
}
}
else
{
if (m_dp_allowed)
{
shifter = 0;
}
else
{
shifter = 0x10;
}
}
INT32 address = ((datainput << shifter) & 0x7fc00000) >> 22;
INT32 fetchval = rsp_divtable[address];
INT32 temp = (0x40000000 | (fetchval << 14)) >> ((~shifter) & 0x1f);
if (rec < 0)
{
temp = ~temp;
}
temp ^= rec >> 31;
if (!rec)
{
temp = 0x7fffffff;
@ -6408,12 +6398,15 @@ inline void rsp_device::ccfunc_rsp_vrcpl_scalar()
int op = m_rsp_state->arg0;
INT32 shifter = 0;
INT32 rec = ((UINT16)(VREG_S(VS2REG, EL & 7)) | m_reciprocal_high);
INT32 rec = (INT16)VREG_S(VS2REG, EL & 7);
INT32 datainput = rec;
if (rec < 0)
if (m_dp_allowed)
{
if (m_dp_allowed)
rec = (rec & 0x0000ffff) | m_reciprocal_high;
datainput = rec;
if (rec < 0)
{
if (rec < -32768)
{
@ -6424,12 +6417,13 @@ inline void rsp_device::ccfunc_rsp_vrcpl_scalar()
datainput = -datainput;
}
}
else
{
datainput = -datainput;
}
}
else if (datainput < 0)
{
datainput = -datainput;
shifter = 0x10;
}
if (datainput)
{
@ -6442,25 +6436,11 @@ inline void rsp_device::ccfunc_rsp_vrcpl_scalar()
}
}
}
else
{
if (m_dp_allowed)
{
shifter = 0;
}
else
{
shifter = 0x10;
}
}
INT32 address = ((datainput << shifter) & 0x7fc00000) >> 22;
INT32 fetchval = rsp_divtable[address];
UINT32 address = (datainput << shifter) >> 22;
INT32 fetchval = rsp_divtable[address & 0x1ff];
INT32 temp = (0x40000000 | (fetchval << 14)) >> ((~shifter) & 0x1f);
if (rec < 0)
{
temp = ~temp;
}
temp ^= rec >> 31;
if (!rec)
{
temp = 0x7fffffff;
@ -6745,12 +6725,15 @@ inline void rsp_device::ccfunc_rsp_vrsql_simd()
INT32 shifter = 0;
UINT16 val;
SIMD_EXTRACT16(m_xv[VS2REG], val, EL);
INT32 rec = m_reciprocal_high | val;
INT32 rec = (INT16)val;
INT32 datainput = rec;
if (rec < 0)
if (m_dp_allowed)
{
if (m_dp_allowed)
rec = (rec & 0x0000ffff) | m_reciprocal_high;
datainput = rec;
if (rec < 0)
{
if (rec < -32768)
{
@ -6761,10 +6744,12 @@ inline void rsp_device::ccfunc_rsp_vrsql_simd()
datainput = -datainput;
}
}
else
{
datainput = -datainput;
}
}
else if (datainput < 0)
{
datainput = -datainput;
shifter = 0x10;
}
if (datainput)
@ -6778,27 +6763,14 @@ inline void rsp_device::ccfunc_rsp_vrsql_simd()
}
}
}
else
{
if (m_dp_allowed)
{
shifter = 0;
}
else
{
shifter = 0x10;
}
}
INT32 address = ((datainput << shifter) & 0x7fc00000) >> 22;
address = ((address | 0x200) & 0x3fe) | (shifter & 1);
INT32 fetchval = rsp_divtable[address];
INT32 temp = (0x40000000 | (fetchval << 14)) >> (((~shifter) & 0x1f) >> 1);
if (rec < 0)
{
temp = ~temp;
}
temp ^= rec >> 31;
if (!rec)
{
temp = 0x7fffffff;
@ -6829,12 +6801,15 @@ inline void rsp_device::ccfunc_rsp_vrsql_scalar()
int op = m_rsp_state->arg0;
INT32 shifter = 0;
INT32 rec = m_reciprocal_high | (UINT16)VREG_S(VS2REG, EL & 7);
INT32 rec = (INT16)VREG_S(VS2REG, EL & 7);
INT32 datainput = rec;
if (rec < 0)
if (m_dp_allowed)
{
if (m_dp_allowed)
rec = (rec & 0x0000ffff) | m_reciprocal_high;
datainput = rec;
if (rec < 0)
{
if (rec < -32768)
{
@ -6845,10 +6820,12 @@ inline void rsp_device::ccfunc_rsp_vrsql_scalar()
datainput = -datainput;
}
}
else
{
datainput = -datainput;
}
}
else if (datainput < 0)
{
datainput = -datainput;
shifter = 0x10;
}
if (datainput)
@ -6862,27 +6839,14 @@ inline void rsp_device::ccfunc_rsp_vrsql_scalar()
}
}
}
else
{
if (m_dp_allowed)
{
shifter = 0;
}
else
{
shifter = 0x10;
}
}
INT32 address = ((datainput << shifter) & 0x7fc00000) >> 22;
address = ((address | 0x200) & 0x3fe) | (shifter & 1);
INT32 fetchval = rsp_divtable[address];
INT32 temp = (0x40000000 | (fetchval << 14)) >> (((~shifter) & 0x1f) >> 1);
if (rec < 0)
{
temp = ~temp;
}
temp ^= rec >> 31;
if (!rec)
{
temp = 0x7fffffff;