Support arithmetic/canonical NaN; update testsuite (#368)

Positive NaN (+nan) is defined as being a NaN value where the sign bit
is clear, the exponent is all ones, and the tag has only the "quiet" bit
set. The quiet bit is the most-significant bit of the tag. For example,
for a 32-bit float, +nan is 0x7cf00000.

"Canonical NaN" is either +nan or -nan, where -nan is +nan with the sign
bit set.

"Arithmetic NaN" is defined as any other quiet NaN (i.e. the quiet bit
must be set, but any other bit can be either 0 or 1.)

This change doesn't update the interpreter because it is only a
loosening of the previous NaN behavior.

1 files changed, 0 insertions, 0 deletions

diff --git a/third_party/testsuite b/third_party/testsuite
-Subproject 066e17da67119f0771af6f55faf3ff8acf2469d
+Subproject d008c314e4e369fa00107a6e010e1c6bf9bff70