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https://stackoverflow.com/questions/5524906/gcc-thumb-support-can-it-be-turned-off-for-just-one-module
Apr 01, 2011 · GCC_THUMB_SUPPORT: Can it be turned OFF for just one module? Ask Question 1. 1. Is there a way to turn off GCC_THUMB_SUPPORT mode for sections of code or a module only rather than switching the entire application to ARM mode? iphone xcode. share improve this question.
http://gcc.gnu.org/ml/java-patches/2002-q1/msg00780.html
I wasn't building all of the xscale-elf mulitlibs before. This patch is needed in order to get -mthumb working. Ok for branch and trunk? Fri Mar 15 23:11:19 2002 Anthony Green <[email protected]> * java/lang/ieeefp.h: Add ARM thumb support (copied from newlib).
https://wiki.netbsd.org/tutorials/how_to_use_thumb_mode_on_arm/
Luckily GCC makes this relatively easy with the thumb-interwork option. As an overview, most machine independent (MI) C code can be compiled to thumb mode and most machine dependent (MD) C and assembly code can only be compiled to ARM mode. Some parts of the ARM port specific code in NetBSD have support for thumb mode, but most of them do not.
https://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html
Using the GNU Compiler Collection (GCC): ARM Options. ... Generate code that supports calling between the ARM and Thumb instruction sets. Without this option, on pre-v5 architectures, the two instruction sets cannot be reliably used inside one program. ... Additionally, the following architectures, which lack support for the Thumb execution ...
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47535
I have a GCC 4.6.0 (SVN trunk) compiler configured targeting arm-linux, configured with the --with-mode=thumb option to generate Thumb code by default. When I pass the compiler the -mno-thumb option, it ignores the option, and generates Thumb code anyway.
https://www.cnx-software.com/2011/04/22/compile-with-arm-thumb2-reduce-memory-footprint-and-improve-performance/
Apr 22, 2011 · ARM claims that Thumb-2 instructions (for ARM Cortex cores and all ARMv7 processors) provides performance improvements and code size optimization: Thumb-2 ... - No Comments on Compile with ARM Thumb2 to Reduce Memory Footprint and Improve Performance. Compile with ARM Thumb2 to Reduce Memory Footprint and Improve Performance. ARM claims that ...
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