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{{arm title|ARMv8}}{{arm isa main}} | {{arm title|ARMv8}}{{arm isa main}} | ||
− | '''ARMv8''' | + | '''ARMv8''' is the successor to {{\\|ARMv7}}, an [[ARM]] [[instruction set architecture]] announced in [[2011]] which brought a large number of fundumental changes to the instruction set, including the introduction of 64-bit operating capabilities. |
== Overview == | == Overview == | ||
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=== AArch32 === | === AArch32 === | ||
{{main|arm/aarch32|l1=AArch32}} | {{main|arm/aarch32|l1=AArch32}} | ||
− | ARMv8 introduced the concept of {{\\|AArch32}} execution state to incorporate what was | + | ARMv8 introduced the concept of {{\\|AArch32}} execution state to incorporate what was previous {{\\|ARMv7}}. It covers the {{\\|A32}} and {{\\|T32}} instruction sets along with a number of new instructions. AArch32 keeps the classical ARM exception model and limits the virtual address to 32 bits. |
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=== AArch64 === | === AArch64 === | ||
{{main|arm/aarch64|l1=AArch64}} | {{main|arm/aarch64|l1=AArch64}} | ||
ARMv8 introduced the new {{\\|AArch64}} execution state that operates on a new instruction set called the {{\\|A64}}. This mode reworked the exception handling model in ARM, making it simpler with fewer modes and banked registers. With 64-bit support, up to 48 bits of virtual address was introduced (note that it's actually an extension of the {{arm|LPAE|Large Physical Address Extension}} which was introduced in {{\\|ARMv7}} but was developed concurrently with the ARMv8). Additionally, both security ({{arm|TrustZone}}) and virtualization carries over to AArch64. | ARMv8 introduced the new {{\\|AArch64}} execution state that operates on a new instruction set called the {{\\|A64}}. This mode reworked the exception handling model in ARM, making it simpler with fewer modes and banked registers. With 64-bit support, up to 48 bits of virtual address was introduced (note that it's actually an extension of the {{arm|LPAE|Large Physical Address Extension}} which was introduced in {{\\|ARMv7}} but was developed concurrently with the ARMv8). Additionally, both security ({{arm|TrustZone}}) and virtualization carries over to AArch64. | ||
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== Profiles == | == Profiles == | ||
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| Microcontroller || ARMv8-M || Optimized for embedded systems with a highly deterministic operation. | | Microcontroller || ARMv8-M || Optimized for embedded systems with a highly deterministic operation. | ||
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* Richard Grisenthwaite. (October 26, 2011). ''"Technology Preview: The ARM Architecture - a View of the Future "''. | * Richard Grisenthwaite. (October 26, 2011). ''"Technology Preview: The ARM Architecture - a View of the Future "''. | ||
* ARM Architecture Group. "Armv8 instruction set overview." vol. PRD03-GENC-010197 (2011). | * ARM Architecture Group. "Armv8 instruction set overview." vol. PRD03-GENC-010197 (2011). | ||
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