On 15/11/11 16:17, Matthew Gretton-Dann wrote: > All, > > The attached patch causes libgcc to use the UDIV and SDIV instructions > when possible in the implementation of the ARM div/mod functions in libgcc. > > This will benefit Cortex-M3, Cortex-M4, all Cortex-R* CPUs, Cortex-A7, > and Cortex-A15. > > The special case of some Cortex-R* CPUs where the UDIV/SDIV instructions > are only available in Thumb mode, making it beneficial to force these > library functions into Thumb mode to make use of those instructions, is > not handled. > > This was tested by configuring GCC --with-cpu cortex-a15, and then > running the testsuite with -mcpu=cortex-a9. I've also manually > inspected libgcc to make sure the functions are being built as expected. > > Please can someone review? > > Thanks, > > Matt > > libgcc/ChangeLog: > > 2011-11-15 Matthew Gretton-Dann <matthew.gretton-d...@arm.com> > > * config/arm/lib1funcs.asm (udivsi3): Add support for divide > functions. > (aeabi_uidivmod): Likewise. > (umodsi3): Likewise. > (divsi3): Likewise. > (aeabi_idivmod): Likewise. > (modsi3): Likewise. >
OK. R.
