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faster and more accurate segment handling

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@373 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-08-21 23:25:21 +00:00
parent 3f33731662
commit 2e255c6b9f
7 changed files with 153 additions and 97 deletions
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20
cpu-exec.c
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@ -182,7 +182,7 @@ int cpu_exec(CPUState *env1)
tmp_T0 = T0;
#endif
interrupt_request = env->interrupt_request;
if (interrupt_request) {
if (__builtin_expect(interrupt_request, 0)) {
#if defined(TARGET_I386)
/* if hardware interrupt pending, we execute it */
if ((interrupt_request & CPU_INTERRUPT_HARD) &&
@ -238,15 +238,7 @@ int cpu_exec(CPUState *env1)
always be the same before a given translated block
is executed. */
#if defined(TARGET_I386)
flags = (env->segs[R_CS].flags & DESC_B_MASK)
>> (DESC_B_SHIFT - HF_CS32_SHIFT);
flags |= (env->segs[R_SS].flags & DESC_B_MASK)
>> (DESC_B_SHIFT - HF_SS32_SHIFT);
flags |= (((unsigned long)env->segs[R_DS].base |
(unsigned long)env->segs[R_ES].base |
(unsigned long)env->segs[R_SS].base) != 0) <<
HF_ADDSEG_SHIFT;
flags |= env->hflags;
flags = env->hflags;
flags |= (env->eflags & (IOPL_MASK | TF_MASK | VM_MASK));
cs_base = env->segs[R_CS].base;
pc = cs_base + env->eip;
@ -402,13 +394,9 @@ void cpu_x86_load_seg(CPUX86State *s, int seg_reg, int selector)
saved_env = env;
env = s;
if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK)) {
SegmentCache *sc;
selector &= 0xffff;
sc = &env->segs[seg_reg];
sc->base = (void *)(selector << 4);
sc->limit = 0xffff;
sc->flags = 0;
sc->selector = selector;
cpu_x86_load_seg_cache(env, seg_reg, selector,
(uint8_t *)(selector << 4), 0xffff, 0);
} else {
load_seg(seg_reg, selector, 0);
}