Fix bit mask for IsCanonical

The mask should cover the sign (1 bit), exponent (11 bits) and quiet bit (1 bit) of significand, total of 13 bits. The old mask only covered 9 bits.

Change-Id: I6ec402b4cec34978eac8fa3e5452ad22540a93ce
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1726984Reviewed-by: Bill Budge <bbudge@chromium.org>
Commit-Queue: Zhi An Ng <zhin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#63015}

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

@@ -1052,7 +1052,7 @@ bool IsSameNan(double expected, double actual) {
 bool IsCanonical(double actual) {
   uint64_t actual_bits = bit_cast<uint64_t>(actual);
   // Canonical NaN has quiet bit and no payload.
-  return (actual_bits & 0xFF80000000000000) == actual_bits;
+  return (actual_bits & 0xFFF8000000000000) == actual_bits;
 }
 
 void CheckDoubleResult(double x, double y, double expected, double actual,