Question about the Implementation of vector32_is_highbit_set on ARM

Hi all,
I have some questions about the implementation of vector32_is_highbit_set  on arm.
Below is the comment and the implementation for this function.
/*
 * Exactly like vector8_is_highbit_set except for the input type, so it
 * looks at each byte separately.
 *
 * XXX x86 uses the same underlying type for 8-bit, 16-bit, and 32-bit
 * integer elements, but Arm does not, hence the need for a separate
 * function. We could instead adopt the behavior of Arm's vmaxvq_u32(), i.e.
 * check each 32-bit element, but that would require an additional mask
 * operation on x86.
 */
#ifndef USE_NO_SIMD
static inline bool
vector32_is_highbit_set(const Vector32 v)
{
#if defined(USE_NEON)
        return vector8_is_highbit_set((Vector8) v);
#else
        return vector8_is_highbit_set(v);
#endif
}
#endif                                                  /* ! USE_NO_SIMD */

But I still don't understand why the vmaxvq_u32 intrinsic  is not used on the arm platform.
We have used the macro USE_NEON to distinguish different platforms.
In addition, according to the "Arm Neoverse N1 Software Optimization Guide",
The vmaxvq_u32 intrinsic  has half the latency of vmaxvq_u8 and twice the bandwidth.
So I think just use vmaxvq_u32 directly.

Any comments or feedback are welcome.
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