It seems offsets are compiled wrong with our compiler
Being a potential gcc bug I'll subscribe doko and add a bug task.
--- bad-avx512-enabled
+++ good-avx512-disabled
- vmovdqu8 xmm0,XMMWORD PTR [rax*8+0x0]
+ vmovdqu xmm0,XMMWORD PTR [rax*8+0x0]
vinserti128 ymm0,ymm0,XMMWORD PTR [rax*8+0x10],0x1
vmovups XMMWORD PTR [rsi],xmm0
vextracti128 XMMWORD PTR [rsi+0x10],ymm0,0x1
- vmovdqu8 xmm0,XMMWORD PTR [rax*8+0x2]
+ vmovdqu xmm0,XMMWORD PTR [rax*8+0x20]
vinserti128 ymm0,ymm0,XMMWORD PTR [rax*8+0x30],0x1
vmovups XMMWORD PTR [rsi+0x20],xmm0
vextracti128 XMMWORD PTR [rsi+0x30],ymm0,0x1
- vmovdqu8 xmm0,XMMWORD PTR [rax*8+0x4]
+ vmovdqu xmm0,XMMWORD PTR [rax*8+0x40]
vinserti128 ymm0,ymm0,XMMWORD PTR [rax*8+0x50],0x1
vmovups XMMWORD PTR [rsi+0x40],xmm0
vextracti128 XMMWORD PTR [rsi+0x50],ymm0,0x1
- vmovdqu8 xmm0,XMMWORD PTR [rax*8+0x6]
+ vmovdqu xmm0,XMMWORD PTR [rax*8+0x60]
vinserti128 ymm0,ymm0,XMMWORD PTR [rax*8+0x70],0x1
vmovups XMMWORD PTR [rsi+0x60],xmm0
vextracti128 XMMWORD PTR [rsi+0x70],ymm0,0x1
I know I'll need to ask for or recreate on my own a repro for Doko to take a
look ... time arr
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https://bugs.launchpad.net/bugs/1799397
Title:
[dpdk]rte_memcpy() moves data incorrectly on Ubuntu 18.04 on Intel
Skylake.
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