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cpu/m68000: Support direct FPU moves to A registers, not just indirect. [R. Belmont]

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This commit is contained in:
arbee 2024-11-29 22:10:41 -05:00
parent 5da955ae0b
commit 510d5edf29
1 changed files with 6 additions and 14 deletions
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20
src/devices/cpu/m68000/m68kfpu.cpp
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@ -573,6 +573,10 @@ u32 m68000_musashi_device::READ_EA_32(int ea)
{ {
return REG_D()[reg]; return REG_D()[reg];
} }
case 1: // An
{
return REG_A()[reg];
}
case 2: // (An) case 2: // (An)
{ {
u32 ea = REG_A()[reg]; u32 ea = REG_A()[reg];
@ -1865,20 +1869,7 @@ void m68000_musashi_device::fmove_fpcr(u16 w2)
switch (mode) switch (mode)
{ {
case 0: // Dn case 0: // Dn
#if 0 case 1: // An
if (dir)
{
if (regsel & 4) WRITE_EA_32(ea, m_fpcr);
if (regsel & 2) WRITE_EA_32(ea, m_fpsr);
if (regsel & 1) WRITE_EA_32(ea, m_fpiar);
}
else
{
if (regsel & 4) m_fpcr = READ_EA_32(ea);
if (regsel & 2) m_fpsr = READ_EA_32(ea);
if (regsel & 1) m_fpiar = READ_EA_32(ea);
}
#endif
break; break;
case 2: // (An) case 2: // (An)
@ -1943,6 +1934,7 @@ void m68000_musashi_device::fmove_fpcr(u16 w2)
switch (mode) switch (mode)
{ {
case 0: // Dn case 0: // Dn
case 1: // An
case 3: // (An)+ case 3: // (An)+
case 4: // -(An) case 4: // -(An)
if (dir) // From system control reg to <ea> if (dir) // From system control reg to <ea>