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i386.cpp: correct buggy fxsave and fxrstor opcodes and let chihiro show 3D again

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yz70s 2024-07-11 00:38:05 +02:00
parent 2d8233a36f
commit a4de92f3e9
1 changed files with 2 additions and 2 deletions
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4
src/devices/cpu/i386/pentops.hxx
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@ -2808,7 +2808,7 @@ void i386_device::sse_group_0fae() // Opcode 0f ae
WRITE16(ea + 0, m_x87_cw);
WRITE16(ea + 2, m_x87_sw);
for(int i = 0; i < 8; i++)
if((m_x87_tw & (3 << i)) != 3) atag |= 1 << i;
if (((m_x87_tw >> (i * 2)) & 3) != X87_TW_EMPTY) atag |= 1 << i;
WRITE16(ea + 4, atag);
WRITE16(ea + 6, m_x87_opcode);
WRITE32(ea + 8, m_x87_inst_ptr);
@ -2850,7 +2850,7 @@ void i386_device::sse_group_0fae() // Opcode 0f ae
m_x87_reg[i].high = READ16(ea + i*16 + 40);
if(!(atag & (1 << i)))
tag = X87_TW_EMPTY;
if(floatx80_is_zero(m_x87_reg[i]))
else if(floatx80_is_zero(m_x87_reg[i]))
tag = X87_TW_ZERO;
else if(floatx80_is_inf(m_x87_reg[i]) || floatx80_is_nan(m_x87_reg[i]))
tag = X87_TW_SPECIAL;