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Implement Cyrix SMM mode.

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This commit is contained in:
SarahW 2020-11-08 20:46:42 +00:00
commit c0bc163eaf
9 changed files with 690 additions and 109 deletions
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48
src/x86_ops_mmx_mov.h
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@ -50,7 +50,7 @@ static int opMOVD_l_mm_a32(uint32_t fetchdat)
static int opMOVD_mm_l_a16(uint32_t fetchdat)
{
MMX_ENTER();
fetch_ea_16(fetchdat);
if (cpu_mod == 3)
{
@ -69,6 +69,52 @@ static int opMOVD_mm_l_a16(uint32_t fetchdat)
static int opMOVD_mm_l_a32(uint32_t fetchdat)
{
MMX_ENTER();
fetch_ea_32(fetchdat);
if (cpu_mod == 3)
{
cpu_state.regs[cpu_rm].l = cpu_state.MM[cpu_reg].l[0];
CLOCK_CYCLES(1);
}
else
{
SEG_CHECK_WRITE(cpu_state.ea_seg);
CHECK_WRITE(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr + 3);
writememl(easeg, cpu_state.eaaddr, cpu_state.MM[cpu_reg].l[0]); if (cpu_state.abrt) return 1;
CLOCK_CYCLES(2);
}
return 0;
}
/*Cyrix maps both MOVD and SMINT to the same opcode*/
static int opMOVD_mm_l_a16_cx(uint32_t fetchdat)
{
if (cpu_cur_status & CPU_STATUS_SMM)
return opSMINT(fetchdat);
MMX_ENTER();
fetch_ea_16(fetchdat);
if (cpu_mod == 3)
{
cpu_state.regs[cpu_rm].l = cpu_state.MM[cpu_reg].l[0];
CLOCK_CYCLES(1);
}
else
{
SEG_CHECK_WRITE(cpu_state.ea_seg);
CHECK_WRITE(cpu_state.ea_seg, cpu_state.eaaddr, cpu_state.eaaddr + 3);
writememl(easeg, cpu_state.eaaddr, cpu_state.MM[cpu_reg].l[0]); if (cpu_state.abrt) return 1;
CLOCK_CYCLES(2);
}
return 0;
}
static int opMOVD_mm_l_a32_cx(uint32_t fetchdat)
{
if (cpu_cur_status & CPU_STATUS_SMM)
return opSMINT(fetchdat);
MMX_ENTER();
fetch_ea_32(fetchdat);
if (cpu_mod == 3)