ARM Cortex-X2
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The ARM Cortex-X2 is a CPU implementing the ARMv9-A 64-bit instruction set designed by ARM Holdings' Austin design centre as part of ARM's Cortex-X Custom (CXC) program.cite-ref-11-1-0[1]
It forms part of Arm's Total Compute Solutions 2021 (TCS21) along with Arm's Cortex-A710, Cortex-A510, Mali-G710 and CoreLink CI-700/NI-700.cite-ref-2[2]
Contents
• Usage
• See also
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Architecture changes in comparison with ARM Cortex-X1
The processor implements the following changes:cite-ref-3[3]
• ARMv9.0cite-ref-4[4]
• 10 cycle pipeline down from 11, created by reducing the dispatch stage from 2 cycles to 1
• Reorder buffer (ROB) increased by 30% from 224 entries to 288
• dTLB increased by 20% from 40 entries to 48
• SVE2 SIMD support
• Bfloat16 data type support
• Support for Aarch32 removed
• DSU-110
• Up to 12 cores (up from 8 cores)
• Up to 16M L3 cache (up from 8 MB)
• CoreLink CI-700/NI-700
• Up to 32MB SLC
Performance claims:
• Comparing the Cortex-X2cite-ref-5[5] to the Cortex-X1 with the same process, clock speed, and 4MB of L3 cache (also known as ISO-process):
• 16% greater integer performance / IPC
• 100% greater ML performance
• 30% peak performance improvement over the Cortex-X1 in smartphones
(3.3 GHz, 1MB L2, 8MB L3)
• 40% faster than an Intel Core i5-1135G7 at 15W (3.5 GHz, 1MB L2, 16MB L3)
Architecture comparison
"Prime" core
| uArch | Cortex-A78 | Cortex-X1 | | Cortex-X3 | Cortex-X4 | Cortex-X925 |
|---|---|---|---|---|---|---|
| Code name | Hercules | Hera | Matterhorn-ELP | Makalu-ELP | Hunter-ELP | Blackhawk |
| Architecture | ARMv8.2 | ARMv8.2 | ARMv9 | ARMv9 | ARMv9.2 | ARMv9.2 |
| Peak clock speed | ~3.0 GHz | ~3.0 GHz | ~3.0 GHz | ~3.3 GHz | ~3.4 GHz | ~3.8 GHz |
| Decode width | 4 | 5 | 5 | 6 | 10 [ 6 ] | 10 [ 6 ] |
| Dispatch | 6/cycle | 8/cycle | 8/cycle | 8/cycle | 10/cycle | 10/cycle |
| Max in-flight | 2x 160 | 2x 224 | 2x 288 | 2x 320 | 2x 384 | 2x 768 |
| L0 (Mops entries) | 1536 [ 7 ] | 3072 [ 7 ] | 3072 [ 7 ] | 1536 | 0 [ 6 ] | |
| L1-I + L1-D | 32+32 KiB | 64+64 KiB | 64+64 KiB | 64+64 KiB | 64+64 KiB | 64+64 KiB |
| L2 | 128–512 KiB | 0.25–1 MiB | 0.25–1 MiB | 0.25–1 MiB | 0.5–2 MiB | 2–3 MiB |
| L3 | 0–8 MiB [ 8 ] | 0–8 MiB [ 8 ] | 0–16 MiB | 0–16 MiB | 0–32 MiB | 0–32 MiB |
Usage
• Qualcomm • Snapdragon 7+ Gen 2cite-ref-9[9] • Snapdragon 8/8+ Gen 1cite-ref-10[10]cite-ref-anandtech-11-0[11]
See also
• ARM Cortex-A710, related high performance microarchitecture
• Comparison of ARMv8-A cores, ARMv8 family
References
cite-note-11-11. ↑ "Cortex-X Custom CPU program". Arm. Retrieved 2021-12-02.
cite-note-22. ↑ "Arm Total Compute solutions powering decade of compute - Arm Community". Arm. 2021-05-25. Retrieved 2023-09-16.
cite-note-33. ↑ "Arm Launches Its New Flagship Performance Armv9 Core: Cortex-X2". WikiChip Fuse. 2021-05-25. Retrieved 2021-12-03.
cite-note-44. ↑ "Documentation – Arm Developer". arm.com. Archived from the original on 2021-12-03. Retrieved 2021-12-03.
cite-note-55. ↑ "Arm Announces Mobile Armv9 CPU Microarchitectures: Cortex-X2, Cortex-A710 & Cortex-A510". anandtech.com. Archived from the original on May 25, 2021. Retrieved 2021-12-03.
cite-note-1-61. "Arm Cortex-X4, A720, and A520: 2024 smartphone CPUs deep dive". Android Authority. 2023-05-29. Retrieved 2023-06-01.
cite-note-2-72. "Arm's New Cortex-A78 and Cortex-X1 Microarchitectures: An Efficiency and Performance Divergence". anandtech.com. Archived from the original on May 26, 2020. Retrieved 2023-06-01.
cite-note-83. citerefschor2020Schor, David (2020-05-26). "Arm Cortex-X1: The First From The Cortex-X Custom Program". WikiChip Fuse. Retrieved 2023-05-30.
cite-note-99. ↑ "Snapdragon 7+ Gen 2 Mobile Platform". Qualcomm. Retrieved 17 March 2023.
cite-note-1010. ↑ "Qualcomm Snapdragon 8 Gen 1 Mobile Platform | Latest 5G Snapdragon Processor". qualcomm.com. 17 November 2021. Retrieved 2021-12-02.
cite-note-anandtech-1111. ↑ "The Snapdragon 8 Gen 1 Performance Preview: Sizing Up Cortex-X2". AnandTech. December 14, 2021. Archived from the original on December 22, 2021. Retrieved March 3, 2022.
cite-note-1212. ↑ "Exynos 2200 | Processor".