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Added 386 LOADALL instruction, removed 286 LOADALL from non-286 CPUs. Patch from Battler.

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This commit is contained in:
TomW 2016-02-07 18:15:43 +00:00
commit 0b6be244ac
2 changed files with 90 additions and 17 deletions
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75
src/x86_ops_misc.h
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@ -689,7 +689,80 @@ static int opLOADALL(uint32_t fetchdat)
ds = readmemw(0, 0x848) | (readmemb(0, 0x84A) << 16);
CLOCK_CYCLES(195);
return 0;
}
}
static int set_segment_limit(x86seg *s, uint8_t segdat3)
{
if ((s->access & 0x18) != 0x10 || !(s->access & (1 << 2))) /*expand-down*/
{
s->limit_high = s->limit;
s->limit_low = 0;
}
else
{
s->limit_high = (segdat3 & 0x40) ? 0xffffffff : 0xffff;
s->limit_low = s->limit + 1;
}
}
static int loadall_load_segment(uint32_t addr, x86seg *s)
{
uint32_t attrib = readmeml(0, addr);
uint32_t segdat3 = (attrib >> 16) & 0xff;
s->access = (attrib >> 8) & 0xff;
s->base = readmeml(0, addr + 4);
s->limit = readmeml(0, addr + 8);
if (s == &_cs) use32 = (segdat3 & 0x40) ? 0x300 : 0;
if (s == &_ss) stack32 = (segdat3 & 0x40) ? 1 : 0;
set_segment_limit(s, segdat3);
}
static int opLOADALL386(uint32_t fetchdat)
{
uint32_t la_addr = es + EDI;
cr0 = readmeml(0, la_addr);
flags = readmemw(0, la_addr + 4);
eflags = readmemw(0, la_addr + 6);
flags_extract();
pc = readmeml(0, la_addr + 8);
EDI = readmeml(0, la_addr + 0xC);
ESI = readmeml(0, la_addr + 0x10);
EBP = readmeml(0, la_addr + 0x14);
ESP = readmeml(0, la_addr + 0x18);
EBX = readmeml(0, la_addr + 0x1C);
EDX = readmeml(0, la_addr + 0x20);
ECX = readmeml(0, la_addr + 0x24);
EAX = readmeml(0, la_addr + 0x28);
dr[6] = readmeml(0, la_addr + 0x2C);
dr[7] = readmeml(0, la_addr + 0x30);
tr.seg = readmemw(0, la_addr + 0x34);
ldt.seg = readmemw(0, la_addr + 0x38);
GS = readmemw(0, la_addr + 0x3C);
FS = readmemw(0, la_addr + 0x40);
DS = readmemw(0, la_addr + 0x44);
SS = readmemw(0, la_addr + 0x48);
CS = readmemw(0, la_addr + 0x4C);
ES = readmemw(0, la_addr + 0x50);
loadall_load_segment(la_addr + 0x54, &tr);
loadall_load_segment(la_addr + 0x60, &idt);
loadall_load_segment(la_addr + 0x6c, &gdt);
loadall_load_segment(la_addr + 0x78, &ldt);
loadall_load_segment(la_addr + 0x84, &_gs);
loadall_load_segment(la_addr + 0x90, &_fs);
loadall_load_segment(la_addr + 0x9c, &_ds);
loadall_load_segment(la_addr + 0xa8, &_ss);
loadall_load_segment(la_addr + 0xb4, &_cs);
loadall_load_segment(la_addr + 0xc0, &_es);
if (CPL==3 && oldcpl!=3) flushmmucache_cr3();
CLOCK_CYCLES(350);
return 0;
}
static int opCPUID(uint32_t fetchdat)
{