Sprinter/mame
2
0
Fork 0
mirror of https://github.com/holub/mame synced 2025-06-16 17:29:27 +03:00
Code Issues Actions 3 Packages Projects Releases Wiki Activity

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

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
src/devices/cpu/m68000/m68kfpu.cpp
View File

@ -573,6 +573,10 @@ u32 m68000_musashi_device::READ_EA_32(int ea)
{
return REG_D()[reg];
}
case 1: // An
{
return REG_A()[reg];
}
case 2: // (An)
{
u32 ea = REG_A()[reg];
@ -1865,20 +1869,7 @@ void m68000_musashi_device::fmove_fpcr(u16 w2)
switch (mode)
{
case 0: // Dn
#if 0
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
case 1: // An
break;
case 2: // (An)
@ -1943,6 +1934,7 @@ void m68000_musashi_device::fmove_fpcr(u16 w2)
switch (mode)
{
case 0: // Dn
case 1: // An
case 3: // (An)+
case 4: // -(An)
if (dir) // From system control reg to <ea>