Mike clark chief architect zen ryzenian1/23/2024 ![]() ![]() AVX512_VBMI2 - Vector Bit Manipulation Instructions 2 (Ice Lake).AVX512_BITALG - Bit Algorithms (Ice Lake).AVX512_VPOPCNTDQ - Vector Population Count Instructions ( Ice Lake).AVX512_VBMI - Vector Bit Manipulation Instructions (Cannon Lake).AVX512_IFMA - Integer Fused Multiply-Add ( Cannon Lake).AVX512BW - Byte and Word Instructions (Skylake X).AVX512DQ - Doubleword and Quadword Instructions (Skylake X).AVX512VL - Vector Length Extensions (Skylake X).AVX512CD - Conflict Detection Instructions ( Skylake X).AVX512F - Foundation (first introduced with Intel Skylake).Zen 4 introduced the following ISA enhancements: APUs: RDNA2-based iGPU with 2 compute units (128 stream processors).New sockets AM5 (client), SP5 and SP6 (server), FP7/FP7r2 (mobile).128 cores but preliminary data shows a slightly altered architecture featuring cores that take up less space Some ALU operations on vector registers (VPABSx,VPHADDx,VPHSUBx,VPSLLx,VPSRLx,VPSRAx,VPACKx,VPSIGNx,VMAXx,VMINx) increased latency by 1 cycle.Some ALU operations on vector registers increased throughput from 2 to 3 ops/cycle.Latency and/or throughput of VPERMx, VBROADCASTx, VPMOVXx instructions improved.BSF, BSR, and BMI1 instructions BLSI, BLSMSK, BLSR, TZCNT have smaller latency of 1 and x2 throughput (4 insn/cycle).REPE CMPSB (sometimes used to implement string comparison) is significantly sped up, processes more than 32 bytes/cycle when operating on L1 data.Larger integer register file (from 192 to 224), floating-point register file (from 160 to 192) and reorder buffer (from 256 to 320 entries).Capable of higher all-core clockspeeds (shown by AMD to reach 5GHz+ on all cores).Higher Transistor Density, due to 5nm process.Improved cache load, write and prefetch from/to register (less latency).physical and linear address size raised from 48 to 52 and 57 bits respectively 元 cache average load-to-use latency increased from 46 to 50 cycles.L2 cache doubled from 512 KiB to 1 MiB per core (not all processor models), latency increased from 12 to 14 cycles minimum.Op cache size increased from 4,096 to 6,750 Ops per core.L1 and L2 DTLB size increased from 64 to 72 and 2,048 to 3,072 entries.AVX-512 instructions support, 256-bit data path.4-way 256-bit wide floating point execution, a speculative, out-of-order load/store unit capable of up to three loads or two stores per cycle with a 48/88-entry load and 64-entry store queue, write-combining, and 5-level paging with four TLBs and six hardware page table walkers. Zen 4 is a 64-bit superscalar, out-of-order, 2-way SMT microarchitecture with advanced dynamic branch prediction, 4-way decoding of x86 instructions with a stack optimizer, multiple caches including an Op cache for decoded instructions and prefetchers for code and data, four integer/address and two floating point instruction schedulers, 3-way address generation, 5-way integer execution. ![]() The chips are fabricated by TSMC, CCDs and monolithic chips on a 5 nm node, IODs on a 6 nm node. ("Bergamo" processors configuration TBD.) A CCX contains 8 CPU cores (fewer may be usable on some models) communicating through a shared 元 cache. The monolithic chips integrate a subset of the IOD facilities and additional peripherals tailored for their target market, a CCX, and a GPU. The CCDs communicate with peripherals and each other through the Data and Control Fabrics on the I/O die, and each contain a single Core Complex (CCX). The IOD contains memory controllers, I/O controllers, microcontrollers for security purposes and power management, and other peripherals. MCMs consist of a single I/O die and up to 12 Core Complex Dies attached with full-duplex serial point-to-point links. Processors implementing Zen 4 are SoCs configured as a Multi-Chip Module or monolithic chip. Mainstream desktop & mobile processors with GPUĬloud multiprocessors (smaller, almost half-size Zen 4c core sacrificing half of the 元 cache.) Mainstream to high-end desktops & enthusiasts Information may be incomplete and can change by final release. Preliminary Data! Information presented in this article deal with future products, data, features, and specifications that have yet to be finalized, announced, or released. ![]()
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