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Tweak flat DS/SS dynarec optimisation, should reduce block churn when routines are called both with and without flat DS/SS.

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Fixed incorrect STACK32 flag when entering V86 mode that was hidden by block churn.
Protected and V86 mode status now considered when selecting block.
This commit is contained in:
SarahW 2017-11-15 21:55:27 +00:00
commit 717d815604
10 changed files with 108 additions and 78 deletions
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16
src/x86_ops_misc.h
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@ -762,16 +762,16 @@ static int opLOADALL(uint32_t fetchdat)
_ss.access = readmemb(0, 0x845);
_ss.limit = readmemw(0, 0x846);
if (_ss.base == 0 && _ss.limit_low == 0 && _ss.limit_high == 0xffffffff)
cpu_cur_status |= CPU_STATUS_FLATSS;
cpu_cur_status &= ~CPU_STATUS_NOTFLATSS;
else
cpu_cur_status &= ~CPU_STATUS_FLATSS;
cpu_cur_status |= CPU_STATUS_NOTFLATSS;
ds = readmemw(0, 0x848) | (readmemb(0, 0x84A) << 16);
_ds.access = readmemb(0, 0x84B);
_ds.limit = readmemw(0, 0x84C);
if (_ds.base == 0 && _ds.limit_low == 0 && _ds.limit_high == 0xffffffff)
cpu_cur_status |= CPU_STATUS_FLATDS;
cpu_cur_status &= ~CPU_STATUS_NOTFLATDS;
else
cpu_cur_status &= ~CPU_STATUS_FLATDS;
cpu_cur_status |= CPU_STATUS_NOTFLATDS;
gdt.base = readmemw(0, 0x84E) | (readmemb(0, 0x850) << 16);
gdt.limit = readmemw(0, 0x852);
ldt.base = readmemw(0, 0x854) | (readmemb(0, 0x856) << 16);
@ -822,16 +822,16 @@ static void loadall_load_segment(uint32_t addr, x86seg *s)
if (s == &_ds)
{
if (s->base == 0 && s->limit_low == 0 && s->limit_high == 0xffffffff)
cpu_cur_status |= CPU_STATUS_FLATDS;
cpu_cur_status &= ~CPU_STATUS_NOTFLATDS;
else
cpu_cur_status &= ~CPU_STATUS_FLATDS;
cpu_cur_status |= CPU_STATUS_NOTFLATDS;
}
if (s == &_ss)
{
if (s->base == 0 && s->limit_low == 0 && s->limit_high == 0xffffffff)
cpu_cur_status |= CPU_STATUS_FLATSS;
cpu_cur_status &= ~CPU_STATUS_NOTFLATSS;
else
cpu_cur_status &= ~CPU_STATUS_FLATSS;
cpu_cur_status |= CPU_STATUS_NOTFLATSS;
}
}