7acb3db0b1
The MIPS16e instruction set still has to be enabled by setting MIPS_INSTRUCTION_SET = 'mips16e' in e.g. distro.conf and can be disabled on a per-recipe basis as needed. This is a similar approach as is available on ARM for Thumb support. Note that contrary to the ARM Thumb support in OE, we do add a new OVERRIDE (mips16e), as there are some recipes in OE that need to be compiled slightly differently if mips16e mode is requested. (From OE-Core rev: e9d8b02a42eb08802e202770409cb5378b79b281) Signed-off-by: André Draszik <adraszik@tycoint.com> Signed-off-by: Ross Burton <ross.burton@intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
2012/03/30 - Mark Hatle mark.hatle@windriver.com
- Initial Version
MIPS currently defines 12 ABIs. Combinations of: *) Big/Little Endian *) Hardware/Software Floating Point *) o32, n32, n64 ABI
TUNE_ARCH, the GNU canonical arch, is defined as:
mips${MIPSPKGSFX_BYTE}${MIPSPKGSFX_ENDIAN}
The package arch is defined in such a way to generated a standard naming scheme. The scheme is: [-nf][-n32]
TUNE_PKGARCH is defined as:
${MIPSPKGSFX_VARIANT_tune-${DEFAULTTUNE}}${MIPSPKGSFX_FPU}${MIPSPKGSFX_ABI}
The following is a list of MIPS specific variables:
MIPSPKGSFX_BYTE - This is defined as either blank and "64" for MIPS64 CPUs.
MIPSPKGSFX_ENDIAN - For bigendian hardware this is blank, otherwise it's defined as "el".
MIPSPKGSFX_VARIANT_tune- - In the default tunings it is set to the same value as TUNE_ARCH. In custom, optimized tunings, the value should be modified to more precisely describe the tuning.
MIPSPKGSFX_FPU - The value is set to "" or "-nf", where "-nf" indicates that the tune is using a non-floating point ABI.
MIPSPKGSFX_ABI - This is used to specify an alternative ABI when the previous values are not enough to distringuish the package. "-n32" is added when building for N32 ABI.