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[libpng15] Improve commentary in ARM-NEON code.

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This commit is contained in:
John Bowler 2012-12-14 23:46:56 -06:00 committed by Glenn Randers-Pehrson
parent 62cfc893e0
commit 508a744251
2 changed files with 15 additions and 2 deletions
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16
arm/arm_init.c
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@ -1,8 +1,9 @@
/* filter_neon.S - NEON optimised filter functions /* arm_init.c - NEON optimised filter functions
* *
* Copyright (c) 2011 Glenn Randers-Pehrson * Copyright (c) 2012 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011. * Written by Mans Rullgard, 2011.
* Last changed in libpng 1.5.14 [(PENDING RELEASE)]
* *
* This code is released under the libpng license. * This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer
@ -50,6 +51,17 @@ png_init_filter_functions_neon(png_structp pp, unsigned int bpp)
return; return;
#endif #endif
/* IMPORTANT: any new external functions used here must be declared using
* PNG_INTERNAL_FUNCTION in ../pngpriv.h. This is required so that the
* 'prefix' option to configure works:
*
* ./configure --with-libpng-prefix=foobar_
*
* Verify you have got this right by running the above command, doing a build
* and examining pngprefix.h; it must contain a #define for every external
* function you add. (Notice that this happens automatically for the
* initialization function.)
*/
pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon; pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_neon;
if (bpp == 3) if (bpp == 3)

1
arm/filter_neon.S
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@ -3,6 +3,7 @@
* *
* Copyright (c) 2011 Glenn Randers-Pehrson * Copyright (c) 2011 Glenn Randers-Pehrson
* Written by Mans Rullgard, 2011. * Written by Mans Rullgard, 2011.
* Last changed in libpng 1.5.7 [December 15, 2011]
* *
* This code is released under the libpng license. * This code is released under the libpng license.
* For conditions of distribution and use, see the disclaimer * For conditions of distribution and use, see the disclaimer