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http://infocenter.arm.com/help/topic/com.arm.doc.faqs/ka15414.html
How does the ARM Compiler support unaligned accesses? Applies to: DS-5, RealView Development Suite (RVDS) Answer. Older ARM processors require data load and stores to be to/from architecturally aligned addresses.
http://infocenter.arm.com/help/topic/com.arm.doc.ddi0344k/Beihgifg.html
Unaligned data access support The processor supports loads and stores of unaligned words and halfwords. The processor makes the required number of memory accesses and transfers adjacent bytes transparently. Data accesses that cross a word boundary can add to the access time. Setting the A bit in
https://developer.arm.com/docs/ddi0344/latest/unaligned-data-and-mixed-endian-data-support/unaligned-data-access-support
Unaligned data access support The processor supports loads and stores of unaligned words and halfwords. The processor makes the required number of memory accesses and …
https://developer.arm.com/docs/ddi0301/h/unaligned-and-mixed-endian-data-access-support
About unaligned and mixed-endian support. Unaligned access support. Endian support. Operation of unaligned accesses. Mixed-endian access support. Instructions to reverse bytes in a general-purpose register. Instructions to change the CPSR E bit.
http://www.onarm.com/forum/13940/
Jan 09, 2009 · Thread 13940: HiThe Cortex-M3 should support unaligned data access to save RAMspace without the lost of performances. Is there a possibility toenable this features for an entire project or do I have to use the__packed attribut for each data structure?
http://www.keil.com/support/man/docs/armcc/armcc_chr1359124947629.htm
Non-Confidential PDF versionARM DUI0375H ARM® Compiler v5.06 for µVision® armcc User GuideVersion 5Home > Compiler Command-line Options > --unaligned_access, --no_unaligned_access 7.160 --unaligned_access, --no_unaligned_access Enables and disables unaligned accesses to data on ARM architecture-based processors. Default The default is --unaligned_access on ARM-architecture …
https://medium.com/@iLevex/the-curious-case-of-unaligned-access-on-arm-5dd0ebe24965
Dec 27, 2016 · The curious case of unaligned access on ARM. ... ARM didn’t support unaligned access in the expected way. For STR, STM and LDM, the requested address was simply rounded down to a …
http://www.keil.com/support/man/docs/armcc/armcc_chr1359124229461.htm
Non-Confidential PDF versionARM DUI0375H ARM® Compiler v5.06 for µVision® armcc User GuideVersion 5Home > Compiler Coding Practices > Unaligned data access in C and C++ code 4.34 Unaligned data access in C and C++ code It can be necessary to access unaligned data in memory, for example, when porting legacy code from a CISC architecture where instructions are available to …
https://jsolano.net/2012/09/06/arm-unaligned-data-access-and-floating-point-in-linux/
I was recently getting Data Aborts on an ARM11 program that makes intensive use on unaligned data accesses. The issue was caused by unaligned floating point accesses, which were not handled by the Linux kernel. Some background on the problem follows. ARM unaligned data access hardware support ARM 32-bit instructions must always be word boundary…
http://www.keil.com/support/man/docs/armclang_ref/armclang_ref_sam1444138667173.htm
Default-munaligned-access is the default for architectures that support unaligned accesses to data. This applies to all architectures supported by Arm Compiler 6, …
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