tests/tcg: target/mips: Add tests for MSA integer compare instructions

tests/tcg: target/mips: Add tests for MSA integer compare instructions

Add tests for MSA integer compare instructions. This includes
following instructions:

  * CEQ.B - integer compare equal (bytes)
  * CEQ.H - integer compare equal (halfwords)
  * CEQ.W - integer compare equal (words)
  * CEQ.D - integer compare equal (doublewords)
  * CLE_S.B - signed integer compare less or equal (bytes)
  * CLE_S.H - signed integer compare less or equal (halfwords)
  * CLE_S.W - signed integer compare less or equal (words)
  * CLE_S.D - signed integer compare less or equal (doublewords)
  * CLE_U.B - unsigned integer compare less or equal (bytes)
  * CLE_U.H - unsigned integer compare less or equal (halfwords)
  * CLE_U.W - unsigned integer compare less or equal (words)
  * CLE_U.D - unsigned integer compare less or equal (doublewords)
  * CLT_S.B - signed integer compare less or equal (bytes)
  * CLT_S.H - signed integer compare less or equal (halfwords)
  * CLT_S.W - signed integer compare less or equal (words)
  * CLT_S.D - signed integer compare less or equal (doublewords)
  * CLT_U.B - unsigned integer compare less or equal (bytes)
  * CLT_U.H - unsigned integer compare less or equal (halfwords)
  * CLT_U.W - unsigned integer compare less or equal (words)
  * CLT_U.D - unsigned integer compare less or equal (doublewords)

Each test consists of 80 test cases, so altogether there are 1600 test
cases.

Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Message-Id: <1551185735-17154-2-git-send-email-aleksandar.markovic@rt-rk.com>