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From: "PHHargrove at lbl dot gov" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/54142] ppc64 build failure - Unrecognized opcode: `sldi' (and `srdi`)
Date: Tue, 31 Jul 2012 17:59:00 -0000
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D54142

--- Comment #6 from Paul H. Hargrove <PHHargrove at lbl dot gov> 2012-07-31=
 17:59:31 UTC ---
(In reply to comment #2)
> sldi and srdi are both standard PowerPC64 instructions.


IBM's "Programming Environments Manual for 64-Bit Microprocessors" lists sl=
di
and srdi as "Simplified Mnemonics".  Perhaps using the canonical instructio=
ns
is a simple resolution to this bug?

Shift left immediate      sldi rA,rS,n (n < 64)        rldicr rA,rS,n,63 =
=E2=80=93 n
Shift right immediate    srdi rA,rS,n (n < 64)        rldicl rA,rS,64 =E2=
=80=93 n,n


Additionally, there may be a GAS bug lurking here as well.