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Revise the comments in the EM tests.

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You can cheat these tests if _cms_ and _cmu_ always push zero.
This commit is contained in:
George Koehler 2017-12-21 18:19:26 -05:00
parent 787fdeaaa9
commit 4bb31c296d
3 changed files with 13 additions and 5 deletions
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6
tests/plat/dup_e.e
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@ -2,8 +2,10 @@
mes 2, EM_WSIZE, EM_PSIZE mes 2, EM_WSIZE, EM_PSIZE
/* /*
* Test _dup_ and _dus_ by loading 20 bytes from _src_, then making * Tests _dup_ and _dus_ by loading 20 bytes from _src_, then making
* and checking some duplicates. * and checking some duplicates. The compilers might never _dup_ or
* _dus_ with large sizes, so the compilers might work even if this
* test fails. You can cheat this test if _cms_ always pushes zero.
*/ */
exa src exa src

6
tests/plat/exg_e.e
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@ -2,8 +2,10 @@
mes 2, EM_WSIZE, EM_PSIZE mes 2, EM_WSIZE, EM_PSIZE
/* /*
* Test _exg_ by loading 40 bytes from _src_, then exchanging 20 and * Tests _exg_ by loading 40 bytes from _src_, then exchanging 20 and
* 20 bytes, and checking the result. * 20 bytes, and checking the result. The compilers might never _exg_
* large sizes, so the compilers might work even if this test fails.
* You can cheat this test if _cms_ always pushes zero.
*/ */
exa src exa src

6
tests/plat/rotate_e.e
View file

@ -2,12 +2,16 @@
mes 2, EM_WSIZE, EM_PSIZE mes 2, EM_WSIZE, EM_PSIZE
/* /*
* Test _rol_ (rotate left) and _ror_ (rotate right). * Tests _rol_ (rotate left) and _ror_ (rotate right). Several back
* ends provide _rol_ and _ror_, but as of year 2017, the compilers
* and optimizers had never emit _rol_ nor _ror_.
* *
* By tradition, _rol_ and _ror_ can't rotate values shorter than the * By tradition, _rol_ and _ror_ can't rotate values shorter than the
* word size, or longer than 4 bytes. * word size, or longer than 4 bytes.
* - If word size is 2, then try rotating 2-byte and 4-byte values. * - If word size is 2, then try rotating 2-byte and 4-byte values.
* - If word size is 4, then try rotating 4-byte values. * - If word size is 4, then try rotating 4-byte values.
*
* You can cheat this test if _cmu_ always pushes zero.
*/ */
#if EM_WSIZE == 2 #if EM_WSIZE == 2