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<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
xmlns:xi="http://www.w3.org/2001/XInclude"
xmlns:xlink="http://www.w3.org/1999/xlink"
version="5.0"
xml:id="sec_floatingpoint_rounding">
<title>Floating-point rounding modes</title>
<para>The Intel (x86 / x86_64) and PowerISA architectures both support the
4 IEEE754 rounding modes. Again while the Intel Intrinsic API allows the
application to change rounding modes via updates to the
<literal>MXCSR</literal> it is a bad idea
and should be replaced with the POSIX APIs (<literal>fegetround</literal> and
<literal>fesetround</literal>). </para>
</section>