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sparc: STD/STDA/LDD/LDDA when RD is odd is an illegal instruction

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This commit is contained in:
hap 2021-11-28 15:08:01 +01:00
parent aaef28cd47
commit fc48b58205
1 changed files with 11 additions and 2 deletions
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13
src/devices/cpu/sparc/sparc.cpp
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@ -2570,7 +2570,7 @@ void sparc_base_device::execute_store(uint32_t op)
m_icount = 0;
return;
}
else if (USEIMM && (STDA || STA || STHA || STBA))
else if ((USEIMM && (STDA || STA || STHA || STBA)) || ((STD || STDA) && (RD & 1)))
{
m_trap = 1;
m_illegal_instruction = 1;
@ -2888,6 +2888,15 @@ if (((trap = 0) and (LDD or LDDA or LDDF or LDDC)) then (
inline void sparc_base_device::execute_ldd(uint32_t op)
{
if (RD & 1)
{
m_trap = 1;
m_illegal_instruction = 1;
m_stashed_icount = m_icount;
m_icount = 0;
return;
}
const uint32_t address = RS1REG + (USEIMM ? SIMM13 : RS2REG);
if (address & 7)
@ -3403,7 +3412,7 @@ inline void sparc_base_device::execute_ldda(uint32_t op)
m_icount = 0;
return;
}
else if (USEIMM)
else if (USEIMM || (RD & 1))
{
m_trap = 1;
m_illegal_instruction = 1;