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target-arm: Correctly restore FPSCR

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Use the helper functions to save and restore the FPSCR, so that
we correctly propagate rounding mode and flushing behaviour into
the float_status fields. This also allows us to stop saving the
vector length/stride fields separately.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2013-04-19 12:24:19 +01:00
parent 602131e944
commit e91f229a25
1 changed files with 41 additions and 7 deletions
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48
target-arm/machine.c
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@ -9,17 +9,51 @@ static bool vfp_needed(void *opaque)
return arm_feature(env, ARM_FEATURE_VFP); return arm_feature(env, ARM_FEATURE_VFP);
} }
static int get_fpscr(QEMUFile *f, void *opaque, size_t size)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
uint32_t val = qemu_get_be32(f);
vfp_set_fpscr(env, val);
return 0;
}
static void put_fpscr(QEMUFile *f, void *opaque, size_t size)
{
ARMCPU *cpu = opaque;
CPUARMState *env = &cpu->env;
qemu_put_be32(f, vfp_get_fpscr(env));
}
static const VMStateInfo vmstate_fpscr = {
.name = "fpscr",
.get = get_fpscr,
.put = put_fpscr,
};
static const VMStateDescription vmstate_vfp = { static const VMStateDescription vmstate_vfp = {
.name = "cpu/vfp", .name = "cpu/vfp",
.version_id = 1, .version_id = 2,
.minimum_version_id = 1, .minimum_version_id = 2,
.minimum_version_id_old = 1, .minimum_version_id_old = 2,
.fields = (VMStateField[]) { .fields = (VMStateField[]) {
VMSTATE_FLOAT64_ARRAY(env.vfp.regs, ARMCPU, 32), VMSTATE_FLOAT64_ARRAY(env.vfp.regs, ARMCPU, 32),
VMSTATE_UINT32_ARRAY(env.vfp.xregs, ARMCPU, 16), /* The xregs array is a little awkward because element 1 (FPSCR)
/* TODO: Should use proper FPSCR access functions. */ * requires a specific accessor, so we have to split it up in
VMSTATE_INT32(env.vfp.vec_len, ARMCPU), * the vmstate:
VMSTATE_INT32(env.vfp.vec_stride, ARMCPU), */
VMSTATE_UINT32(env.vfp.xregs[0], ARMCPU),
VMSTATE_UINT32_SUB_ARRAY(env.vfp.xregs, ARMCPU, 2, 14),
{
.name = "fpscr",
.version_id = 0,
.size = sizeof(uint32_t),
.info = &vmstate_fpscr,
.flags = VMS_SINGLE,
.offset = 0,
},
VMSTATE_END_OF_LIST() VMSTATE_END_OF_LIST()
} }
}; };