What is GCC/Clang equivalent of -fp-model fast=1 in ICC
<p>As I read on <a href="https://software.intel.com/en-us/articles/the-default-icc-behavior-favors-speed-over-ieee-floating-point-compliance" rel="nofollow">Intel's website</a>:</p>

<blockquote>
  <p>Intel compiler uses /fp-model fast=1 as defaults. This optimization
  favors speed over standards compliance. You may use compiler option
  -mieee-fp to get compliant code.</p>
</blockquote>

<p>My understanding of the <a href="https://software.intel.com/en-us/node/525039" rel="nofollow">fp-model</a> option in ICC is that (correct me if I'm wrong):</p>

<ul>
<li><code>precise</code> corresponds to default settings in GCC and Clang,</li>
<li><code>fast=2</code> is similar to <code>-ffast-math</code>,</li>
<li><code>fast=1</code> is somewhere between.</li>
</ul>

<p>What options in GCC or Clang would make floating point math most similar to Intel's default <code>-fp-model fast=1</code>?</p>