musl gcc compiler generating "udiv" on a A9mp ARM core...

[Ovi Nastai <ovi.nastai@broadcom.com>]

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Hi,

I have  an A9mp based SoC.

My tool generates the “udiv” opcode, that it is not supported by the A9mp.
I also see the “__aeabi_uidiv” at times.

I need to have the tool generating exclusively “__aeabi_uidiv”, on my A9mp
system.



This is the tool’s version:

…

[onastai@bldsrv-ott-03 user]$
../../../../../toolchains/gcc-arm-tzos-musl-4_8-2015q1/bin/arm-tzos-musl-gcc
--version

arm-tzos-musl-gcc (GNU Tools for ARM Embedded Processors) 4.8.4 20140725
(release) [ARM/embedded-4_8-branch revision 213147]

Copyright (C) 2013 Free Software Foundation, Inc.

…

This is the command line (to show the flags):

…

../../../../../toolchains/gcc-arm-tzos-musl-4_8-2015q1/bin/arm-tzos-musl-gcc
-I. -I../../../../kernel/api -MD -MP -mcpu=cortex-a9 -mtune=mpcore
-mfpu=vfpv3 -D__TZOS__ -O2 -g -Wall -Werror  -std=gnu99 -D_POSIX_SOURCE -c
signals_tests.c -o bin/signals_tests.o

../../../../../toolchains/gcc-arm-tzos-musl-4_8-2015q1/bin/arm-tzos-musl-g++
bin/signals_tests.o   -o user.elf

…



Question: are there any flags to instruct the tool to NOT generate the
“udiv” opcodes, and replace them with “sw division” (i.e. “__aeabi_uidiv) ?





Tnx,

Ovi

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