Use on AVR

[Gabriel Dos Reis]

forwarding to the avr-gcc list...

On Sat, Jun 9, 2012 at 10:15 AM, Torbjorn Granlund <tg at gmplib.org> wrote:
> bodrato at mail.dm.unipi.it writes:
>
>  IIRC, with avr-gcc, the unsigned long type exists and it is 32 bits long.
>  Using them for all operations probably is not the faster way to handle
>  long integers, because it forces the compiler to use many registers and a
>  lot of code, but it should work.
>
> I tried avr-gcc both from FreeBSD's ports and from Debian's apt:
>
> Attempt 1:
>
>  tom$ avr-gcc -I. -O -S mini-gmp.c
>  mini-gmp.c: In function 'mpz_out_str':
>  mini-gmp.c:3996:9: warning: incompatible implicit declaration of
>  built-in function 'fwrite' [enabled by default]
>  mini-gmp.c: In function 'mpn_div_qr_preinv':
>  mini-gmp.c:1012:1: error: unable to find a register to spill in class
>  'POINTER_REGS'
>  mini-gmp.c:1012:1: error: this is the insn:
>  (insn 238 236 239 10 (set (reg/v:SI 219 [ n0 ])
>          (mem:SI (pre_dec:HI (reg:HI 2 r2 [orig:239 ivtmp.626 ] [239]))
>          [0 MEM[base: D.7131_301, offset: 0B]+0 S4 A8])) mini-gmp.c:885
>          26 {*movsi}
>       (expr_list:REG_INC (reg:HI 2 r2 [orig:239 ivtmp.626 ] [239])
>          (nil)))
>  mini-gmp.c:1012: confused by earlier errors, bailing out
>
>
> Attempt 2:
>
>  tom$ avr-gcc -mint8 -I. -O -S mini-gmp.c
>  <built-in>:0:0: internal compiler error: Segmentation fault
>  Please submit a full bug report,
>  with preprocessed source if appropriate.
>  See <http://gcc.gnu.org/bugs.html> for instructions.
>
> Not too encouraging.
>
> --
> Torbjörn
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