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Re: recent troubles with float vectors & bitwise ops

From: Paolo Bonzini <bonzini at gnu dot org>
To: Ross Ridge <rridge at csclub dot uwaterloo dot ca>
Cc: gcc at gcc dot gnu dot org
Date: Thu, 23 Aug 2007 13:44:40 +0200
Subject: Re: recent troubles with float vectors & bitwise ops
References: <20070823002336.6686974B95@caffeine.csclub.uwaterloo.ca>

GCC makes the problem is even worse if only SSE and not SSE 2 instructions
are enabled.  Since the integer bitwise instructions are only available
with SSE 2, using casts instead of intrinsics causes GCC to expand the
operation into a long series of instructions.

This was also a bug and a patch for this has been posted and approved.

Paolo

References:
- Re: recent troubles with float vectors & bitwise ops
  - From: Ross Ridge

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