2017-01-31 07:07:14 -05:00
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/* contrib/powerpc-vsx/linux_aux.c
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2017-01-31 06:59:11 -05:00
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*
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2017-02-22 16:09:20 -05:00
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* Copyright (c) 2017 Glenn Randers-Pehrson
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2017-01-31 06:59:11 -05:00
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* Written by Vadim Barkov, 2017.
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2017-03-16 08:21:03 -04:00
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* Last changed in libpng 1.6.29 [March 16, 2017]
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2017-01-31 06:59:11 -05:00
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*
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* This code is released under the libpng license.
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* For conditions of distribution and use, see the disclaimer
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* and license in png.h
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*
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2017-02-01 09:26:02 -05:00
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* STATUS: TESTED
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2017-01-31 06:59:11 -05:00
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* BUG REPORTS: png-mng-implement@sourceforge.net
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*
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2017-02-01 08:58:54 -05:00
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* png_have_vsx implemented for Linux by using the auxiliary vector mechanism.
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2017-01-31 06:59:11 -05:00
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*
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* This code is strict ANSI-C and is probably moderately portable; it does
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* however use <stdio.h> and it assumes that /proc/cpuinfo is never localized.
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*/
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#include "sys/auxv.h"
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#include "png.h"
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static int
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png_have_vsx(png_structp png_ptr)
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{
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2018-08-18 22:47:16 -04:00
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unsigned long auxv = getauxval(AT_HWCAP);
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2017-02-01 09:03:57 -05:00
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PNG_UNUSED(png_ptr)
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2018-08-18 22:47:16 -04:00
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if(auxv & (PPC_FEATURE_HAS_ALTIVEC|PPC_FEATURE_HAS_VSX))
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2017-02-01 08:58:54 -05:00
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return 1;
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2017-01-31 06:59:11 -05:00
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else
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2017-02-01 08:58:54 -05:00
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return 0;
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2017-01-31 06:59:11 -05:00
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}
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