From: Savithri Venkatachalapathy <snvpathy@yahoo.com>
To: gcc-help@gcc.gnu.org
Subject: Question on .md file
Date: Sun, 21 Sep 2003 05:01:00 -0000 [thread overview]
Message-ID: <20030921050138.84838.qmail@web14203.mail.yahoo.com> (raw)
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Hi,
I had a few questions about the .md file.
1.In the .md file I noticed that there are certain
instructions defined as: define_insn "aaa_internal1",
"aaa_internal2a" etc..
What does this actually mean? What does "internal"
suggest?
2. I have 4 brach instructions:
BNE (Branch on Not Equal)
BEQ (Branch on EQual)
BEQZ(Branch on EQual to Zero)
BNEZ(Branch on Not Equal to Zero)
I have defined the first 2 instructions as define_insn
"bne" and define_insn "beq".
But I am not sure which name I should use for the last
2 instructions.
3. Also I noticed in arm.md, sh.md, that the branch
instructions have define_expand and not define_insn.
Why is that?
I would appreciate any help in this regard.
Thanks,
savi
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next reply other threads:[~2003-09-21 5:01 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-21 5:01 Savithri Venkatachalapathy [this message]
2003-09-22 3:25 Savithri Venkatachalapathy
2003-09-22 3:49 ` Ian Lance Taylor
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