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The comments on register usage in ARM memcpy had dest and src the
wrong way round; this patch (originally from Mark Shinwell) corrects
this and adds a note on the return value.
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
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When an IT block was changed from having two instructions to having
one, the IT instruction at the start of the block was not updated,
causing memcpy to fail to assemble for Thumb-2; this patch makes the
obvious fix.
Signed-off-by: Joseph Myers <joseph@codesourcery.com>
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The attached patch adds support for compiling arm uClibc as pure Thumb code.
This is needed because some recent ARM codes do not implement traditional ARM
mode. Specifically:
* Cortex-M1 - An extremely minimal FPGA based core that only implements
Thumb-1 (aka ARMv6-M).
* Cortex-M3 - A Thumb-2 only ARMv7-M core.
Most of uClibc already builds in Thumb mode, all that is left are a handful of
assembly bits.
Tested on arm-uclinuxeabi.
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add support for using BX instruction for THUMB aware architectures
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where the non-hidden version was used.
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do seem to make noticable speed improvement...
-Erik
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