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x86: add fptag_vmstate to the state

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It is needed to store fptags

Signed-off-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Juan Quintela 2009-09-29 22:48:52 +02:00 committed by Anthony Liguori
parent 67b8f41957
commit cdc0c58fa9
2 changed files with 10 additions and 9 deletions
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1
target-i386/cpu.h
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@ -595,6 +595,7 @@ typedef struct CPUX86State {
unsigned int fpstt; /* top of stack index */
uint16_t fpus;
uint16_t fpus_vmstate;
uint16_t fptag_vmstate;
uint16_t fpuc;
uint8_t fptags[8]; /* 0 = valid, 1 = empty */
union {

18
target-i386/machine.c
View File

@ -26,7 +26,7 @@ static void cpu_get_seg(QEMUFile *f, SegmentCache *dt)
void cpu_save(QEMUFile *f, void *opaque)
{
CPUState *env = opaque;
uint16_t fptag, fpregs_format;
uint16_t fpregs_format;
int32_t pending_irq;
int i, bit;
@ -40,14 +40,14 @@ void cpu_save(QEMUFile *f, void *opaque)
/* FPU */
env->fpus_vmstate = (env->fpus & ~0x3800) | (env->fpstt & 0x7) << 11;
fptag = 0;
env->fptag_vmstate = 0;
for(i = 0; i < 8; i++) {
fptag |= ((!env->fptags[i]) << i);
env->fptag_vmstate |= ((!env->fptags[i]) << i);
}
qemu_put_be16s(f, &env->fpuc);
qemu_put_be16s(f, &env->fpus_vmstate);
qemu_put_be16s(f, &fptag);
qemu_put_be16s(f, &env->fptag_vmstate);
#ifdef USE_X86LDOUBLE
fpregs_format = 0;
@ -197,7 +197,7 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
{
CPUState *env = opaque;
int i, guess_mmx;
uint16_t fptag, fpregs_format;
uint16_t fpregs_format;
int32_t pending_irq;
cpu_synchronize_state(env);
@ -211,13 +211,13 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
qemu_get_be16s(f, &env->fpuc);
qemu_get_be16s(f, &env->fpus_vmstate);
qemu_get_be16s(f, &fptag);
qemu_get_be16s(f, &env->fptag_vmstate);
qemu_get_be16s(f, &fpregs_format);
/* NOTE: we cannot always restore the FPU state if the image come
from a host with a different 'USE_X86LDOUBLE' define. We guess
if we are in an MMX state to restore correctly in that case. */
guess_mmx = ((fptag == 0xff) && (env->fpus_vmstate & 0x3800) == 0);
guess_mmx = ((env->fptag_vmstate == 0xff) && (env->fpus_vmstate & 0x3800) == 0);
for(i = 0; i < 8; i++) {
uint64_t mant;
uint16_t exp;
@ -262,9 +262,9 @@ int cpu_load(QEMUFile *f, void *opaque, int version_id)
/* XXX: restore FPU round state */
env->fpstt = (env->fpus_vmstate >> 11) & 7;
env->fpus = env->fpus_vmstate & ~0x3800;
fptag ^= 0xff;
env->fptag_vmstate ^= 0xff;
for(i = 0; i < 8; i++) {
env->fptags[i] = (fptag >> i) & 1;
env->fptags[i] = (env->fptag_vmstate >> i) & 1;
}
for(i = 0; i < 6; i++)