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Don't use AVX2 instructions on unsupported cpus #9

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inferrna opened this issue Feb 18, 2019 · 3 comments · May be fixed by #67
Open

Don't use AVX2 instructions on unsupported cpus #9

inferrna opened this issue Feb 18, 2019 · 3 comments · May be fixed by #67
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enhancement New feature or request

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@inferrna
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inferrna commented Feb 18, 2019 •
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My CPU is Xeon 2665 v1

Program terminated with signal SIGILL, Illegal instruction.
#0  0x00007fcf8c41f6b2 in avc_style_luma_interpolation_filter_horizontal_avx2_intrin ()

$ cpuid | grep -i avx

   AVX/YMM features (0xd/2):
      AVX/YMM save state byte size             = 0x00000100 (256)
      AVX/YMM save state byte offset           = 0x00000240 (576)
      AVX: advanced vector extensions         = true
      AVX2: advanced vector extensions 2       = false
      AVX512F: AVX-512 foundation instructions = false
      AVX512DQ: double & quadword instructions = false
      AVX512IFMA: fused multiply add           = false
      AVX512PF: prefetch instructions          = false
      AVX512ER: exponent & reciprocal instrs   = false
      AVX512CD: conflict detection instrs      = false
      AVX512BW: byte & word instructions       = false
      AVX512VL: vector length                  = false
      AVX512VBMI: vector byte manipulation     = false
      AVX512_4VNNIW: neural network instrs     = false
      AVX512_4FMAPS: multiply acc single prec  = false
         XCR0 supported: AVX state            = true
         XCR0 supported: AVX-512 opmask       = false
         XCR0 supported: AVX-512 ZMM_Hi256    = false
         XCR0 supported: AVX-512 Hi16_ZMM     = false
@hassount
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@inferrna
Thank you for your feedback, at this point SVT-VP9 does not support non-avx2 cpus. However, we welcome contributions enabling such support.

@hassount hassount added the enhancement New feature or request label Feb 19, 2019
@gnafuthegreat
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For example, there was this patch for SVT-AV1 if someone wanted to try and adapt it:

https://github.com/OpenVisualCloud/SVT-AV1/pull/3

@edwintorok edwintorok linked a pull request Oct 16, 2019 that will close this issue
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@lp24db lp24db mentioned this issue Oct 19, 2022
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@davidebeatrici
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Related: #172

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Do not use AVX2 instructions if the CPU doesn't support it edwintorok/SVT-VP9
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@inferrna @davidebeatrici @gnafuthegreat @hassount