Fix RunF32x4UnOpTest to run on array values intead of indices

Change-Id: I99fe89a679e6a628bd6fa7600f756d9a35450243
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1695203Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#62751}

test/cctest/wasm/test-run-wasm-simd.cc

@@ -562,7 +562,8 @@ void RunF32x4UnOpTest(ExecutionTier execution_tier, LowerSimd lower_simd,
     }
   }
 
-  FOR_FLOAT32_NAN_INPUTS(x) {
+  FOR_FLOAT32_NAN_INPUTS(i) {
+    float x = bit_cast<float>(nan_test_array[i]);
     if (!PlatformCanRepresent(x)) continue;
     // Extreme values have larger errors so skip them for approximation tests.
     if (!exact && IsExtreme(x)) continue;