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34 lines
1.2 KiB
XML
34 lines
1.2 KiB
XML
7 years ago
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<?xml version="1.0" encoding="UTF-8"?>
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<!--
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Copyright (c) 2017 OpenPOWER Foundation
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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-->
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="sec_floatingpoint_rounding">
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<title>Floating-point rounding modes</title>
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<para>The Intel (x86 / x86_64) and PowerISA architectures both support the
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7 years ago
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4 IEEE-754 rounding modes. Again while the Intel Intrinsic API allows the
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7 years ago
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application to change rounding modes via updates to the
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<literal>MXCSR</literal> it is a bad idea
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and should be replaced with the POSIX APIs (<literal>fegetround</literal> and
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<literal>fesetround</literal>). </para>
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</section>
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