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Re: [RS6000] reload_vsx_from_gprsf splitter
- From: Alan Modra <amodra at gmail dot com>
- To: Michael Meissner <meissner at linux dot vnet dot ibm dot com>, Ulrich Weigand <uweigand at de dot ibm dot com>, David Edelsohn <dje dot gcc at gmail dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>, Michael R Meissner <mrmeissn at us dot ibm dot com>
- Date: Fri, 12 Feb 2016 08:54:19 +1030
- Subject: Re: [RS6000] reload_vsx_from_gprsf splitter
- Authentication-results: sourceware.org; auth=none
- References: <CAGWvnykKLpmVCHmNWn=JFtGg1UdsXPr1T+nCT_u7C1qDk6JpoA at mail dot gmail dot com> <20160211183816 dot 1A2886BEA at oc7340732750 dot ibm dot com> <20160211215558 dot GC22837 at ibm-tiger dot the-meissners dot org>
On Thu, Feb 11, 2016 at 04:55:58PM -0500, Michael Meissner wrote:
> This is one of the cases I wished the reload support had the ability to
> allocate 2 scratch temporaries instead of 1. As I said in my other message,
> TFmode was a hack to get two registers to use.
Another concern I had about this, besides using %L in asm output (what
forces TFmode to use just fprs?), is what happens when we're using
IEEE 128-bit floats? In that case it looks like we'd get just one reg.
--
Alan Modra
Australia Development Lab, IBM