Fix _mm_test_mix_ones_zeros

Bug: `_mm_test_mix_ones_zeros` always returned true.
The function wasn't reducing `zf` and `cf` to a bool before combining them.

The fix proposed here isn't the most efficient, but at least it is correct. 

Note(s):
The arguments are named incorrectly in the `_mm_test_mix_ones_zeros` documentation[0].
The second argument is the mask, as per the behavior of `_mm_test_mix_ones_zeros` with gcc and clang.
This naming error seems to have propagated through both gcc[1] and llvm[2] headers but not to rust[3] headers or sse2neon[4].

[0] https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=ptest&techs=SSE_ALL&ig_expand=6902
[1] https://github.com/gcc-mirror/gcc/blob/27ce74fa23c93c1189c301993cd19ea766e6bdb5/gcc/config/i386/smmintrin.h#L94
[2] https://github.com/llvm/llvm-project/blob/70535f5e609f747c28cfef699eefb84581b0aac0/clang/lib/Headers/smmintrin.h#L1130
[3] https://github.com/rust-lang/stdarch/blob/f4528dd6e85d97bb802240d7cd048b6e1bf72540/crates/core_arch/src/x86/sse41.rs#L1149
[4] https://github.com/DLTcollab/sse2neon/blob/243e90f654193c97a691b1a53213d091e02eb631/sse2neon.h#L7595

sse2neon.h

@@ -7592,14 +7592,10 @@ FORCE_INLINE int _mm_test_all_zeros(__m128i a, __m128i mask)
 // zero, otherwise set CF to 0. Return 1 if both the ZF and CF values are zero,
 // otherwise return 0.
 // https://www.intel.com/content/www/us/en/docs/intrinsics-guide/index.html#text=mm_test_mix_ones_zero
+// Note: Argument names may be wrong in the Intel intrinsics guide.
 FORCE_INLINE int _mm_test_mix_ones_zeros(__m128i a, __m128i mask)
 {
-    uint64x2_t zf =
-        vandq_u64(vreinterpretq_u64_m128i(mask), vreinterpretq_u64_m128i(a));
-    uint64x2_t cf =
-        vbicq_u64(vreinterpretq_u64_m128i(mask), vreinterpretq_u64_m128i(a));
-    uint64x2_t result = vandq_u64(zf, cf);
-    return !(vgetq_lane_u64(result, 0) | vgetq_lane_u64(result, 1));
+    return !(_mm_testz_si128(a, mask) | _mm_testc_si128(a, mask));
 }
 
 // Compute the bitwise AND of 128 bits (representing integer data) in a and b,