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46 lines
1.9 KiB
46 lines
1.9 KiB
<?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_powerisa_vector_facilities"> |
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<title>PowerISA Vector facilities</title> |
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<para>The PowerISA vector facilities (VMX and VSX) are extensive, but do |
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not always provide a direct or obvious functional equivalent to the Intel |
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Intrinsics. However not being obvious is not the same as impossible. It just |
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requires some basic programing skills.</para> |
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<para>It is a good idea to have an overall understanding of the vector |
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capabilities of the PowerISA. You do not need to memorize every instruction but |
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it helps to know where to look. Both the PowerISA and OpenPOWER ABI have a |
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specific structure and organization that can help you find what you are looking |
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for. </para> |
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<para>It also helps to understand the relationship between the PowerISA's |
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low level instructions and the higher abstraction of the vector intrinsics as |
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defined by the OpenPOWER ABI's Vector Programming Interfaces and the de facto |
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standard of GCC's PowerPC AltiVec Builtin Functions.</para> |
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<xi:include href="sec_powerisa.xml"/> |
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<xi:include href="sec_powerisa_vector_intrinsics.xml"/> |
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<xi:include href="sec_powerisa_vector_size_type.xml"/> |
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</section> |
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