Thank you, Georg and Ian.
I misunderstood the section16.2 of gcc internal manual and thought
that the nameless insn (with * ) in .md file can be only used during
rtl-->asm.
The generated code is correct now.
Thanks again!
--
-Qifei Fan
On Wed, Sep 15, 2010 at 9:27 PM, Georg Lay wrote:
> fanqife
fanqifei schrieb:
> Hi all,
>
> I am porting gcc to a microprocessor. There are no 64bits instructions
> in it. I added a small logical shift right optimization to the md
> file(see below).
> For the statement “k>>32” in which k is 64bits integer, the
> “define_expand” should fail because op2 is 3
fanqifei writes:
> I am porting gcc to a microprocessor. There are no 64bits instructions
> in it. I added a small logical shift right optimization to the md
> file(see below).
> For the statement “k>>32” in which k is 64bits integer, the
> “define_expand” should fail because op2 is 32, not 1.
>
Hi all,
I am porting gcc to a microprocessor. There are no 64bits instructions
in it. I added a small logical shift right optimization to the md
file(see below).
For the statement “k>>32” in which k is 64bits integer, the
“define_expand” should fail because op2 is 32, not 1.
However, I can see the
