kc3-lang/libjpeg-turbo

2016-01-13T03:13:20

ARM32 NEON SIMD implementation of Huffman encoding Full-color compression speedups relative to libjpeg-turbo 1.4.2: 800 MHz ARM Cortex-A9, iOS, 32-bit: 26-44% (avg. 32%) Refer to #42 and #47 for discussion. This commit also removes the unnecessary if (simd_support & JSIMD_ARM_NEON) statements from the jsimd* algorithm functions. Since the jsimd_can*() functions check for the existence of NEON, the corresponding algorithm functions will never be called if NEON isn't available. Removing those if statements improved performance across the board by a couple of percent. Based on: https://github.com/mayeut/libjpeg-turbo/commit/fc023c880ce1d6c908fb78ccc25f5d5fd910ccc5