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Diffstat (limited to 'Build/source/libs/libpng/libpng-src/loongarch/loongarch_lsx_init.c')
-rw-r--r-- | Build/source/libs/libpng/libpng-src/loongarch/loongarch_lsx_init.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/Build/source/libs/libpng/libpng-src/loongarch/loongarch_lsx_init.c b/Build/source/libs/libpng/libpng-src/loongarch/loongarch_lsx_init.c new file mode 100644 index 00000000000..2c80fe81b68 --- /dev/null +++ b/Build/source/libs/libpng/libpng-src/loongarch/loongarch_lsx_init.c @@ -0,0 +1,65 @@ +/* loongarch_lsx_init.c - LSX optimized filter functions + * + * Copyright (c) 2021 Loongson Technology Corporation Limited + * All rights reserved. + * Contributed by Jin Bo <jinbo@loongson.cn> + * + * This code is released under the libpng license. + * For conditions of distribution and use, see the disclaimer + * and license in png.h + */ + +#include "../pngpriv.h" + +#ifdef PNG_READ_SUPPORTED +#if PNG_LOONGARCH_LSX_IMPLEMENTATION == 1 + +#include <sys/auxv.h> + +#define LA_HWCAP_LSX (1<<4) +static int png_has_lsx(void) +{ + int flags = 0; + int flag = (int)getauxval(AT_HWCAP); + + if (flag & LA_HWCAP_LSX) + return 1; + + return 0; +} + +void +png_init_filter_functions_lsx(png_structp pp, unsigned int bpp) +{ + /* 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.) + */ + + if (png_has_lsx()) + { + pp->read_filter[PNG_FILTER_VALUE_UP-1] = png_read_filter_row_up_lsx; + if (bpp == 3) + { + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub3_lsx; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg3_lsx; + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth3_lsx; + } + else if (bpp == 4) + { + pp->read_filter[PNG_FILTER_VALUE_SUB-1] = png_read_filter_row_sub4_lsx; + pp->read_filter[PNG_FILTER_VALUE_AVG-1] = png_read_filter_row_avg4_lsx; + pp->read_filter[PNG_FILTER_VALUE_PAETH-1] = png_read_filter_row_paeth4_lsx; + } + } +} + +#endif /* PNG_LOONGARCH_LSX_IMPLEMENTATION == 1 */ +#endif /* PNG_READ_SUPPORTED */ |