Vector.shiftER, Vector.shiftEL not working as expected.

[Vladimir Ivanov]

Richard has some problems posting on the list, so I'm doing that on his 
behalf.

Best regards,
Vladimir Ivanov

------------------------------------------------------------------------
*From:* Richard Startin
*Sent:* 08 October 2017 19:03:09
*To:* panama-dev at openjdk.java.net
*Subject:* Vector.shiftER, Vector.shiftEL not working as expected.

What are the methods shiftEL and shiftER supposed to do? I read these as 
"shift elements left/right" and expect them to behave like the 
PS[L|R]L[W|D|Q] instructions.


Specifically, I expected the code below to print:


[2, 3, 4, 5, 6, 7, 8, 0]

[0, 1, 2, 3, 4, 5, 6, 7]


/int[] ymmword = new int[] {1, 2, 3, 4, 5, 6, 7, 8};/

/int[] result = new int[8];/

/IntVector.IntSpecies<Shapes.S256Bit> species = 
(IntVector.IntSpecies<Shapes.S256Bit>)Vector.speciesInstance(Integer.class, 
Shapes.S_256_BIT);/

/IntVector<Shapes.256Bit> vector1 = 
(IntVector<Shapes.256Bit>)species.fromArray(ymmword, 0).shiftEL(1);/

/vector1.intoArray(result, 0);/

/System.out.println(Arrays.toString(result));// This prints [0, 1, 2, 3, 
4, 5, 6, 7]/

/
/

/IntVector<Shapes.256Bit> vector2 = 
(IntVector<Shapes.256Bit>)species.fromArray(ymmword, 0).shiftER(1);
/

/vector2.intoArray(result, 0);/

/System.out.println(Arrays.toString(result)); // This prints [2, 2, 2, 
2, 2, 2, 2, 0]/


To build the Panama code I followed the instructions at 
https://software.intel.com/en-us/articles/vector-api-developer-program-for-java


Have I understood the purpose of these methods correctly and is the 
observed output as expected? For reference is it possible to access the 
intended assembly snippets for a given method?


Thanks,
Richard