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arm: Add support for both floating point ABIs

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Add a Kconfig option to select between the Hard and Soft Float ABIs.  We
also default to the Hard Float ABI as this is what older SDK versions
supported.

JIRA: ZEP-555
Change-Id: I2180c98cd7556ab49f5ca9b46b31add2c11bd07b
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
This commit is contained in:
Kumar Gala 2016-06-29 14:42:09 -05:00 • committed by Inaky Perez-Gonzalez
commit 79606bccf0
2 changed files with 27 additions and 0 deletions
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22
arch/arm/core/Kconfig
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@ -62,6 +62,28 @@ config FP_SHARING
This option allows multiple tasks and fibers to use the floating point
registers.
choice
prompt "Floating point ABI"
default FP_HARDABI
depends on FLOAT
config FP_HARDABI
bool "Floating point Hard ABI"
depends on FLOAT
help
This option selects the Floating point ABI in which hardware floating
point instructions are generated and uses FPU-specific calling
conventions
config FP_SOFTABI
bool "Floating point Soft ABI"
depends on FLOAT
help
This option selects the Floating point ABI in which hardware floating
point instructions are generated but soft-float calling conventions.
endchoice
endmenu
if CPU_CORTEX_M