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(mess) i386: int 6 on invalid LxS insn. Makes NTVDM happier. (nw)

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This commit is contained in:
cracyc 2013-02-28 03:53:37 +00:00
parent 5c52a65b0f
commit 6f52503894
1 changed files with 15 additions and 12 deletions
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27
src/emu/cpu/i386/i386op16.c
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@ -3660,47 +3660,50 @@ static void I386OP(retf_i16)(i386_state *cpustate) // Opcode 0xca
CYCLES(cpustate,CYCLES_RET_IMM_INTERSEG);
}
static void I386OP(load_far_pointer16)(i386_state *cpustate, int s)
static bool I386OP(load_far_pointer16)(i386_state *cpustate, int s)
{
UINT8 modrm = FETCH(cpustate);
UINT16 selector;
if( modrm >= 0xc0 ) {
fatalerror("i386: load_far_pointer16 NYI\n");
//logerror("i386: load_far_pointer16 NYI\n"); // don't log, NT will use this a lot
i386_trap(cpustate,6, 0, 0);
return false;
} else {
UINT32 ea = GetEA(cpustate,modrm,0);
STORE_REG16(modrm, READ16(cpustate,ea + 0));
selector = READ16(cpustate,ea + 2);
i386_sreg_load(cpustate,selector,s,NULL);
}
return true;
}
static void I386OP(lds16)(i386_state *cpustate) // Opcode 0xc5
{
I386OP(load_far_pointer16)(cpustate, DS);
CYCLES(cpustate,CYCLES_LDS);
if(I386OP(load_far_pointer16)(cpustate, DS))
CYCLES(cpustate,CYCLES_LDS);
}
static void I386OP(lss16)(i386_state *cpustate) // Opcode 0x0f 0xb2
{
I386OP(load_far_pointer16)(cpustate, SS);
CYCLES(cpustate,CYCLES_LSS);
if(I386OP(load_far_pointer16)(cpustate, SS))
CYCLES(cpustate,CYCLES_LSS);
}
static void I386OP(les16)(i386_state *cpustate) // Opcode 0xc4
{
I386OP(load_far_pointer16)(cpustate, ES);
CYCLES(cpustate,CYCLES_LES);
if(I386OP(load_far_pointer16)(cpustate, ES))
CYCLES(cpustate,CYCLES_LES);
}
static void I386OP(lfs16)(i386_state *cpustate) // Opcode 0x0f 0xb4
{
I386OP(load_far_pointer16)(cpustate, FS);
CYCLES(cpustate,CYCLES_LFS);
if(I386OP(load_far_pointer16)(cpustate, FS))
CYCLES(cpustate,CYCLES_LFS);
}
static void I386OP(lgs16)(i386_state *cpustate) // Opcode 0x0f 0xb5
{
I386OP(load_far_pointer16)(cpustate, GS);
CYCLES(cpustate,CYCLES_LGS);
if(I386OP(load_far_pointer16)(cpustate, GS))
CYCLES(cpustate,CYCLES_LGS);
}