OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

added EIP return to INTO - fixed SHL C flag computation - added LAR/LSL

Browse Source 
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@148 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-05-10 21:35:30 +00:00
parent 447db2139a
commit 2792c4f2af
1 changed files with 66 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

71
op-i386.c
View File

@ -634,6 +634,7 @@ void OPPROTO op_into(void)
int eflags;
eflags = cc_table[CC_OP].compute_all();
if (eflags & CC_O) {
EIP = PARAM1;
raise_exception(EXCP04_INTO);
}
FORCE_RET();
@ -1136,6 +1137,66 @@ void OPPROTO op_addl_A0_seg(void)
A0 += *(unsigned long *)((char *)env + PARAM1);
}
void helper_lsl(void)
{
unsigned int selector, limit;
SegmentDescriptorTable *dt;
int index;
uint32_t e1, e2;
uint8_t *ptr;
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z;
selector = T0 & 0xffff;
if (selector & 0x4)
dt = &env->ldt;
else
dt = &env->gdt;
index = selector & ~7;
if ((index + 7) > dt->limit)
return;
ptr = dt->base + index;
e1 = ldl(ptr);
e2 = ldl(ptr + 4);
limit = (e1 & 0xffff) | (e2 & 0x000f0000);
if (e2 & (1 << 23))
limit = (limit << 12) | 0xfff;
T1 = limit;
CC_SRC |= CC_Z;
}
void OPPROTO op_lsl(void)
{
helper_lsl();
}
void helper_lar(void)
{
unsigned int selector;
SegmentDescriptorTable *dt;
int index;
uint32_t e2;
uint8_t *ptr;
CC_SRC = cc_table[CC_OP].compute_all() & ~CC_Z;
selector = T0 & 0xffff;
if (selector & 0x4)
dt = &env->ldt;
else
dt = &env->gdt;
index = selector & ~7;
if ((index + 7) > dt->limit)
return;
ptr = dt->base + index;
e2 = ldl(ptr + 4);
T1 = e2 & 0x00f0ff00;
CC_SRC |= CC_Z;
}
void OPPROTO op_lar(void)
{
helper_lar();
}
/* flags handling */
/* slow jumps cases (compute x86 flags) */
@ -1490,13 +1551,13 @@ CCTable cc_table[CC_OP_NB] = {
[CC_OP_DECW] = { compute_all_decw, compute_c_incl },
[CC_OP_DECL] = { compute_all_decl, compute_c_incl },
[CC_OP_SHLB] = { compute_all_shlb, compute_c_shll },
[CC_OP_SHLW] = { compute_all_shlw, compute_c_shll },
[CC_OP_SHLB] = { compute_all_shlb, compute_c_shlb },
[CC_OP_SHLW] = { compute_all_shlw, compute_c_shlw },
[CC_OP_SHLL] = { compute_all_shll, compute_c_shll },
[CC_OP_SARB] = { compute_all_sarb, compute_c_shll },
[CC_OP_SARW] = { compute_all_sarw, compute_c_shll },
[CC_OP_SARL] = { compute_all_sarl, compute_c_shll },
[CC_OP_SARB] = { compute_all_sarb, compute_c_sarl },
[CC_OP_SARW] = { compute_all_sarw, compute_c_sarl },
[CC_OP_SARL] = { compute_all_sarl, compute_c_sarl },
};
/* floating point support. Some of the code for complicated x87