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Broadwell - Microarchitectures - Intel
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Broadwell is Intel's microarchitecture based on the 14 nm process for mobile, desktops, and servers. Introduced in early 2015, Broadwell is a process shrink of Haswell which introduced several enhancements.

Codenames

Core Target
Broadwell Y Core M family, SoC for Smartphones, 2-in-1s Tablets, and notebooks
Broadwell U Core ultrabooks
Broadwell H IoT (QM87, HM86/HM87 Chipsets), All-in-ones
Broadwell DT Unlocked desktop MPUs
Broadwell EP Xeon E5, Dual-Processor platform
Broadwell EX Xeon E5, Multi-Processor platform, QPI
Broadwell E High-End Desktops (HEDT)

Architecture

Broadwell is for the most part identical to Haswell with server enhancements.

Key changes from Haswell

  • FP multiplication instructions has reduced latency (3 cycles, down from 5)
    • Affects AVX, SSE, and FP instructions
  • CLMUL instructions are now a single μop, improving latency and throughput
  • The second-level TLB (STLB)
    • Table was enlarged (1,536 entries, up from 1024)
    • 1GB page mode (16 entries, 4-ways set associative)
  • Larger out-of-order scheduler
  • Faster store-to-load forwarding
  • Address prediction for branches and returns was improved
  • Improved cryptography acceleration instructions