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[PATCH, i386]: Allow direct XMM->GR zero extensions for 32bit targets

From: Uros Bizjak <ubizjak at gmail dot com>
To: "gcc-patches at gcc dot gnu dot org" <gcc-patches at gcc dot gnu dot org>
Date: Wed, 31 May 2017 20:37:48 +0200
Subject: [PATCH, i386]: Allow direct XMM->GR zero extensions for 32bit targets
Authentication-results: sourceware.org; auth=none

Hello!

Attached patch allows direct XMM->GR zero extensions for 32bit
targets. This insn will be split after reload to a direct
XMM->lowpart(GR) move and 0->highpart(GR) zeroing.

2017-05-31  Uros Bizjak  <ubizjak@gmail.com>

    * config/i386/i386.md (*zero_extendsidi2): Enable alternative (?r, *Yj)
    also for 32bit target.  Update insn attributes.
    (zero-extendsidi2 splitter): Allow all registers for operand 1.

Bootstrapped and regression tested on x86_64-linux-gnu {,-m32}.

Committed to mainline SVN.

Uros.

Attachment: p.diff.txt
Description: Text document

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