Top Tweets for #prefetchi
#AMD refreshed the "AMD64 Architecture Programmer's Manual, Volumes 3 General-Purpose and System Instructions" 24594 to v3.37
#AVX512 #PREFETCHI
https://t.co/oLI8krEN6W
libvirt project got #Intel #GraniteRapids CPUID A06D0 support[1]. According to this, over the #AMXFP16 and #PREFETCHI, there will be mainly vulnerability mitigations compared to #SapphireRapids[2][3]
[1]https://t.co/NYycCNWyAZ
[2]https://t.co/oi6GD3ege8
[3]https://t.co/NAD0qs584k
![InstLatX64's tweet photo. libvirt project got #Intel #GraniteRapids CPUID A06D0 support[1]. According to this, over the #AMXFP16 and #PREFETCHI, there will be mainly vulnerability mitigations compared to #SapphireRapids[2][3]
[1]https://t.co/NYycCNWyAZ
[2]https://t.co/oi6GD3ege8
[3]https://t.co/NAD0qs584k https://t.co/RMmVfupwhk](https://pbs.twimg.com/media/GTE51rxXQAAodNd.png)
#Intel #EmeraldRapids vs #GraniteRapids ISA changes:
#PREFETCHI, #AMX_FP16, #AMX_COMPLEX, HRESET, PPRO_UD0_SHORT
#Intel released the Software Development Emulator 9.33.0 (SDE 9.33.0):
CPUID codename
A06D0 #GraniteRapidsX
A06E0 #GraniteRapidsD
B0650 #ArrowLakeS (instead of C0660???)
B06C0 #LunarLake
C06C0 #PantherLake
C06F5 #EmeraldRapids
D06D0 #ClearwaterForest
https://t.co/RFVLhMbbUf
#VisualStudio2022 17.9.0 Preview3 added #RAO_INT support for future #Intel CPUs, fixed #PREFETCHI for #Intel #GraniteRapids, added some missing SIMDs.(#AVX_VNNI_INT16, #SHA512, #SM3, #SM4 for #ArrowLake, #LunarLake still missing)
#VisualStudio2022 17.7.0 got #AMX_COMPLEX #PREFETCHI for #Intel #GraniteRapids and
#CMPCCXADD, #AVX_IFMA, #AVX_NE_CONVERT, #AVX_VNNI_INT8 support for #MeteorLake,
#SierraForest, #GrandRidge (#RAO_INT still missing)
Even if we ignore the new process, the new tile design and that the new ISA (#PREFETCHI, #AMX_FP16, #AMX_COMPLEX) are restricted to the #GraniteRapids, we should consider that this just the half of the entire picture: the list of #Crestmont modifications is somewhat longer
#Intel #GoldenCove vs #RedwoodCove
- 32 vs 64 KB L1I cache
- 4 vs 3 clks FMUL
- new ISA: #PREFETCHI, #AMX_FP16, #AMX_COMPLEX
Is there anything else significant beyond the minor details of HotChips2023 slide?
Finally a new microarchitectural detail!
After 2 clks FADD in #Intel #GoldenCove, in #RedwoodCove FMUL is also decoupled from FMA, and it is just 3 clks instead of 4!
Did IFMA & PMUL also inherit this?
#VisualStudio2022 17.7.0 got #AMX_COMPLEX #PREFETCHI for #Intel #GraniteRapids and
#CMPCCXADD, #AVX_IFMA, #AVX_NE_CONVERT, #AVX_VNNI_INT8 support for #MeteorLake,
#SierraForest, #GrandRidge (#RAO_INT still missing)
#VisualStudio2022 17.6 got better #AVX512_FP16 support (#Intel, #GoldenCove, #SapphireRapids) and it supports #AMXFP16 (#GraniteRapids)
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