Hi Rask,
First, Thank you very much for all help you have provided me. It
really help me finish my project.
This is what I did:
I capture all the moves regardless of the operand and then to move an
immediate into a regiser, I force a register:
here is the code for this:
if (!no_new_pseudos)
{
/* taking care of moving constant integers */
if (GET_CODE (operands[1]) == CONST_INT)
{
rtx reg = gen_reg_rtx (SImode);
emit_insn (gen_movsi (reg, operands[1]));
operands[1] = gen_lowpart (QImode, reg);
}
/* moving memory operands */
if (GET_CODE (operands[1]) == MEM)
{
rtx reg = gen_reg_rtx (SImode);
emit_insn (gen_rtx_SET (SImode, reg,
gen_rtx_ZERO_EXTEND (SImode,
operands[1])));
operands[1] = gen_lowpart (QImode, reg);
}
/* moving register operands */
if (GET_CODE (operands[0]) != REG)
operands[1] = force_reg (QImode, operands[1]);
}
I hope this helps.
-Balaji V. Iyer.
--
Balaji V. Iyer
PhD Student,
Center for Efficient, Scalable and Reliable Computing,
Department of Electrical and Computer Engineering,
North Carolina State University.
-----Original Message-----
From: Rask Ingemann Lambertsen [mailto:[EMAIL PROTECTED]
Sent: Monday, December 17, 2007 1:33 PM
To: Balaji V. Iyer
Cc: gcc@gcc.gnu.org; [EMAIL PROTECTED]
Subject: Re: Help with another constraint
On Wed, Dec 12, 2007 at 03:35:09PM +0100, 'Rask Ingemann Lambertsen'
wrote:
>
> The movxx patterns are special and you'll need to hold the
> compiler's hands a little. Since your target can't move immediates
> directly to memory, you have to ask for a secondary reload to an
> intermediate register. Use the target hook TARGET_SECONDARY_RELOAD.
Actually, how do you do that? I can't see any place in the
documentation that says how TARGET_SECONDARY_RELOAD can be used for that
purpose.
--
Rask Ingemann Lambertsen
Danish law requires addresses in e-mail to be logged and stored for a
year
