| 1 | /* contrib/powerpc-vsx/linux_aux.c
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| 2 | *
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| 3 | * Copyright (c) 2017 Glenn Randers-Pehrson
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| 4 | * Written by Vadim Barkov, 2017.
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| 5 | *
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| 6 | * This code is released under the libpng license.
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| 7 | * For conditions of distribution and use, see the disclaimer
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| 8 | * and license in png.h
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| 9 | *
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| 10 | * STATUS: TESTED
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| 11 | * BUG REPORTS: [email protected]
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| 12 | *
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| 13 | * png_have_vsx implemented for Linux by using the auxiliary vector mechanism.
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| 14 | *
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| 15 | * This code is strict ANSI-C and is probably moderately portable; it does
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| 16 | * however use <stdio.h> and it assumes that /proc/cpuinfo is never localized.
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| 17 | */
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| 18 |
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| 19 | #include "sys/auxv.h"
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| 20 | #include "png.h"
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| 21 |
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| 22 | static int
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| 23 | png_have_vsx(png_structp png_ptr)
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| 24 | {
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| 25 | unsigned long auxv = getauxval(AT_HWCAP);
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| 26 |
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| 27 | PNG_UNUSED(png_ptr)
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| 28 |
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| 29 | if(auxv & (PPC_FEATURE_HAS_ALTIVEC|PPC_FEATURE_HAS_VSX))
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| 30 | return 1;
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| 31 | else
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| 32 | return 0;
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| 33 | }
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