Fix vload/vstore for Short and Byte Vectors on P8 and below - #8100
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Because type-specific vector load/store instructions for Byte and ShortVectors (lxvb16x/stxvb16x and lxvh8x/stxvh8x respectively) are only available on P9 and up, we currently use the IntVector versions (lxvw4x/stxvw4x) on P8 and below. However, this loads/stores the vector's contents from/to memory in word-sized chunks, and as a result the order of elements is not presevered from memory to the target register. This contribution addresses this issue by manually rearranging the vector contents just after loading/just before storing. Signed-off-by: midronij <jackie.midroni@ibm.com>
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gita-omr
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Jan 28, 2026
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@dsouzai could you please run the CI tests and merge if everything looks okay? |
dsouzai
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Jan 29, 2026
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jenkins build aix,plinux |
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Addresses #6302 for P8 and below. Also fixes eclipse-openj9/openj9#23139.