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target-i386: Implement XSAVEOPT

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2015-07-02 15:21:23 +01:00
parent 19dc85dba2
commit c9cfe8f9fb
4 changed files with 43 additions and 11 deletions
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29
target-i386/fpu_helper.c
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@ -1197,9 +1197,9 @@ static uint64_t get_xinuse(CPUX86State *env)
return -1;
}
void helper_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm)
static void do_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm,
uint64_t inuse, uint64_t opt, uintptr_t ra)
{
uintptr_t ra = GETPC();
uint64_t old_bv, new_bv;
/* The OS must have enabled XSAVE. */
@ -1214,21 +1214,36 @@ void helper_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm)
/* Never save anything not enabled by XCR0. */
rfbm &= env->xcr0;
opt &= rfbm;
if (rfbm & XSTATE_FP) {
if (opt & XSTATE_FP) {
do_xsave_fpu(env, ptr, ra);
}
if (rfbm & XSTATE_SSE) {
/* Note that saving MXCSR is not suppressed by XSAVEOPT. */
do_xsave_mxcsr(env, ptr, ra);
}
if (opt & XSTATE_SSE) {
do_xsave_sse(env, ptr, ra);
}
/* Update the XSTATE_BV field. */
old_bv = cpu_ldq_data_ra(env, ptr + 512, ra);
new_bv = (old_bv & ~rfbm) | (get_xinuse(env) & rfbm);
new_bv = (old_bv & ~rfbm) | (inuse & rfbm);
cpu_stq_data_ra(env, ptr + 512, new_bv, ra);
}
void helper_xsave(CPUX86State *env, target_ulong ptr, uint64_t rfbm)
{
do_xsave(env, ptr, rfbm, get_xinuse(env), -1, GETPC());
}
void helper_xsaveopt(CPUX86State *env, target_ulong ptr, uint64_t rfbm)
{
uint64_t inuse = get_xinuse(env);
do_xsave(env, ptr, rfbm, inuse, inuse, GETPC());
}
static void do_xrstor_fpu(CPUX86State *env, target_ulong ptr, uintptr_t ra)
{
int i, fpus, fptag;
@ -1369,8 +1384,10 @@ uint64_t helper_xgetbv(CPUX86State *env, uint32_t ecx)
case 0:
return env->xcr0;
case 1:
/* FIXME: #GP if !CPUID.(EAX=0DH,ECX=1):EAX.XG1[bit 2]. */
return env->xcr0 & get_xinuse(env);
if (env->features[FEAT_XSAVE] & CPUID_XSAVE_XGETBV1) {
return env->xcr0 & get_xinuse(env);
}
break;
}
raise_exception_ra(env, EXCP0D_GPF, GETPC());
}