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Message
From: 'Rask Ingemann Lambertsen'<rask@s...>
Date: Mon Dec 10 18:15:42 CET 2007
Subject: [openrisc] Re: Help with another constraint
On Sun, Dec 09, 2007 at 11:35:32AM -0500, Balaji V. Iyer wrote:
> Hello Rask,
> I am not understanding your response, can you clarify it for me?
>
> As per the question about the error message above?
>
> ../../gcc-4.0.2/gcc/libgcc2.c -o libgcc/./_negdi2.o
> ../../gcc-4.0.2/gcc/libgcc2.c: In function '__negdi2':
> ../../gcc-4.0.2/gcc/libgcc2.c:72: error: insn does not satisfy its
> constraints:
I think this is misleading you. It seems likely that the problem is with
the predicate and not the constraint.
> (insn 15 13 16 (set (mem:SI (plus:SI (reg/f:SI 2 r2)
^^^
This has to be a register, doesn't it? If so, use -fdump-rtl-all and look
at the dump files to see where it goes wrong.
> (const_int -28 [0xffffffe4])) [0 D.1256+0 S4 A32])
> (neg:SI (reg:SI 3 r3 [orig:80 D.1255 ] [80]))) 38 {negsi2} (nil)
> (nil))
Please also post your negsi2 pattern.
--
Rask Ingemann Lambertsen
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