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/external/libpng/contrib/libtests/
Dtarith.c734 #define L2INV 94548.46219969910586572651 /* 65536/log(2) */ macro
740 return (png_uint_32)floor(.5-log(x/255.)*L2INV); in png_log8bit()
748 return (png_uint_32)floor(.5-log(x/65535.)*L2INV); in png_log16bit()