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document immediate field in RETF

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This commit is contained in:
Dan Luu 2013-03-17 13:36:52 -04:00
parent f1e5201126
commit c6a5989cf7
1 changed files with 9 additions and 9 deletions
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18
cpux86-ta.js
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@ -4449,7 +4449,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
op_CALLF_paged_mode(is_32_bit, selector, Le, oe);
}
}
function do_return_not_paged_mode(is_32_bit, is_iret, cf) {
function do_return_not_paged_mode(is_32_bit, is_iret, imm16) {
var Te, selector, stack_eip, stack_eflags, SS_mask, qe, ef;
SS_mask = 0xffff;
Te = regs[4];
@ -4488,7 +4488,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
Te = (Te + 2) & -1;
}
}
regs[4] = (regs[4] & ~SS_mask) | ((Te + cf) & SS_mask);
regs[4] = (regs[4] & ~SS_mask) | ((Te + imm16) & SS_mask);
cpu.segs[1].selector = selector;
cpu.segs[1].base = (selector << 4);
eip = stack_eip, physmem8_ptr = initial_mem_ptr = 0;
@ -4503,7 +4503,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
}
init_segment_local_vars();
}
function do_return_paged_mode(is_32_bit, is_iret, cf) {
function do_return_paged_mode(is_32_bit, is_iret, imm16) {
var selector, stack_eflags, gf;
var hf, jf, kf, lf;
var e, descriptor_low4bytes, descriptor_high4bytes, we, xe;
@ -4615,7 +4615,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
}
if (!(descriptor_high4bytes & (1 << 15)))
abort_with_error_code(11, selector & 0xfffc);
Te = (Te + cf) & -1;
Te = (Te + imm16) & -1;
if (rpl == cpl_var) {
set_segment_vars(1, selector, calculate_descriptor_base(descriptor_low4bytes, descriptor_high4bytes), calculate_descriptor_limit(descriptor_low4bytes, descriptor_high4bytes), descriptor_high4bytes);
} else {
@ -4670,7 +4670,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
Pe(3, rpl);
Pe(4, rpl);
Pe(5, rpl);
Te = (Te + cf) & -1;
Te = (Te + imm16) & -1;
}
regs[4] = (regs[4] & ~SS_mask) | ((Te) & SS_mask);
eip = stack_eip, physmem8_ptr = initial_mem_ptr = 0;
@ -4703,11 +4703,11 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
}
}
}
function op_RETF(is_32_bit, cf) {
function op_RETF(is_32_bit, imm16) {
if (!(cpu.cr0 & (1 << 0)) || (cpu.eflags & 0x00020000)) {
do_return_not_paged_mode(is_32_bit, 0, cf);
do_return_not_paged_mode(is_32_bit, 0, imm16);
} else {
do_return_paged_mode(is_32_bit, 0, cf);
do_return_paged_mode(is_32_bit, 0, imm16);
}
}
@ -7477,7 +7477,7 @@ CPU_X86.prototype.exec_internal = function(N_cycles, interrupt) {
}
break EXEC_LOOP;
case 0xca://RETF Iw Return from procedure
y = (ld16_mem8_direct() << 16) >> 16;
y = (ld16_mem8_direct() << 16) >> 16; //16 bit immediate field
op_RETF((((CS_flags >> 8) & 1) ^ 1), y);
{
if (cpu.hard_irq != 0 && (cpu.eflags & 0x00000200))