Need to manually clear the FPCA bit in the CONTROL register on Cortex-M processor during context switching?

[allen-c]

In zephyr/arch/arm/core/cortex_m/swap_helper.S:
add r0, r2, #_thread_offset_to_preempt_float
vldmia r0, {s16-s31}
.L_in_fp_endif:
/* Clear CONTROL.FPCA that may have been set by FP instructions */
mrs r3, CONTROL
bic r3, #_CONTROL_FPCA_Msk
msr CONTROL, r3
isb

But in arm document DDI0403E_e_armv7m_arm

So the manual clear operation seems unnecessary.

[allen-c]

Sorry, I make a mistake.