[Bug target/54222] [avr] Implement fixed-point support

["gjl at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54222

--- Comment #8 from Georg-Johann Lay <gjl at gcc dot gnu.org> 2012-11-22 10:00:24 UTC ---
Author: gjl
Date: Thu Nov 22 10:00:13 2012
New Revision: 193721

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193721
Log:
libgcc/
    Adjust decimal point of signed accum mode to GCC default.

    PR target/54222
    * config/avr/t-avr (LIB1ASMFUNCS): Add _fractsfsq _fractsfusq,
    _divqq_helper.
    * config/avr/lib1funcs-fixed.S (__fractqqsf, __fracthqsf)
    (__fractsasf, __fractsfha, __fractusqsf, __fractsfsa)
    (__mulha3, __mulsa3)
    (__divqq3, __divha3, __divsa3): Adjust to new position of
    decimal point of signed accum types. 

    (__mulusa3_round): New function.
    (__mulusa3): Use it.
    (__divqq_helper): New function.
    (__udivuqq3): Use it.

gcc/
    Adjust decimal point of signed accum mode to GCC default.

    PR target/54222
    * config/avr/avr-modes.def (HA, SA, DA): Remove mode adjustments.
    (TA): Move decimal point one bit to the right.
    * config/avr/avr.c (avr_out_fract): Rewrite.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/avr/avr-modes.def
    trunk/gcc/config/avr/avr.c
    trunk/libgcc/ChangeLog
    trunk/libgcc/config/avr/lib1funcs-fixed.S
    trunk/libgcc/config/avr/t-avr