diff options
Diffstat (limited to 'media/libjpeg/simd/mips64/jcsample-mmi.c')
| -rw-r--r-- | media/libjpeg/simd/mips64/jcsample-mmi.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/media/libjpeg/simd/mips64/jcsample-mmi.c b/media/libjpeg/simd/mips64/jcsample-mmi.c new file mode 100644 index 0000000000..0354dac087 --- /dev/null +++ b/media/libjpeg/simd/mips64/jcsample-mmi.c @@ -0,0 +1,98 @@ +/* + * Loongson MMI optimizations for libjpeg-turbo + * + * Copyright (C) 2015, 2018-2019, D. R. Commander. All Rights Reserved. + * Copyright (C) 2016-2017, Loongson Technology Corporation Limited, BeiJing. + * All Rights Reserved. + * Authors: ZhuChen <zhuchen@loongson.cn> + * CaiWanwei <caiwanwei@loongson.cn> + * SunZhangzhi <sunzhangzhi-cq@loongson.cn> + * + * Based on the x86 SIMD extension for IJG JPEG library + * Copyright (C) 1999-2006, MIYASAKA Masaru. + * + * This software is provided 'as-is', without any express or implied + * warranty. In no event will the authors be held liable for any damages + * arising from the use of this software. + * + * Permission is granted to anyone to use this software for any purpose, + * including commercial applications, and to alter it and redistribute it + * freely, subject to the following restrictions: + * + * 1. The origin of this software must not be misrepresented; you must not + * claim that you wrote the original software. If you use this software + * in a product, an acknowledgment in the product documentation would be + * appreciated but is not required. + * 2. Altered source versions must be plainly marked as such, and must not be + * misrepresented as being the original software. + * 3. This notice may not be removed or altered from any source distribution. + */ + +/* CHROMA DOWNSAMPLING */ + +#include "jsimd_mmi.h" +#include "jcsample.h" + + +void jsimd_h2v2_downsample_mmi(JDIMENSION image_width, int max_v_samp_factor, + JDIMENSION v_samp_factor, + JDIMENSION width_in_blocks, + JSAMPARRAY input_data, JSAMPARRAY output_data) +{ + int inrow, outrow, outcol; + JDIMENSION output_cols = width_in_blocks * DCTSIZE; + JSAMPROW inptr0, inptr1, outptr; + __m64 bias, mask = 0.0, thisavg, nextavg, avg; + __m64 this0o, this0e, this0, this0sum, next0o, next0e, next0, next0sum; + __m64 this1o, this1e, this1, this1sum, next1o, next1e, next1, next1sum; + + expand_right_edge(input_data, max_v_samp_factor, image_width, + output_cols * 2); + + bias = _mm_set1_pi32((1 << 17) + 1); /* 0x00020001 (32-bit bias pattern) */ + /* bias={1, 2, 1, 2} (16-bit) */ + mask = _mm_cmpeq_pi16(mask, mask); + mask = _mm_srli_pi16(mask, BYTE_BIT); /* {0xFF 0x00 0xFF 0x00 ..} */ + + for (inrow = 0, outrow = 0; outrow < v_samp_factor; + inrow += 2, outrow++) { + + inptr0 = input_data[inrow]; + inptr1 = input_data[inrow + 1]; + outptr = output_data[outrow]; + + for (outcol = output_cols; outcol > 0; + outcol -= 8, inptr0 += 16, inptr1 += 16, outptr += 8) { + + this0 = _mm_load_si64((__m64 *)&inptr0[0]); + this1 = _mm_load_si64((__m64 *)&inptr1[0]); + next0 = _mm_load_si64((__m64 *)&inptr0[8]); + next1 = _mm_load_si64((__m64 *)&inptr1[8]); + + this0o = _mm_and_si64(this0, mask); + this0e = _mm_srli_pi16(this0, BYTE_BIT); + this1o = _mm_and_si64(this1, mask); + this1e = _mm_srli_pi16(this1, BYTE_BIT); + this0sum = _mm_add_pi16(this0o, this0e); + this1sum = _mm_add_pi16(this1o, this1e); + + next0o = _mm_and_si64(next0, mask); + next0e = _mm_srli_pi16(next0, BYTE_BIT); + next1o = _mm_and_si64(next1, mask); + next1e = _mm_srli_pi16(next1, BYTE_BIT); + next0sum = _mm_add_pi16(next0o, next0e); + next1sum = _mm_add_pi16(next1o, next1e); + + thisavg = _mm_add_pi16(this0sum, this1sum); + nextavg = _mm_add_pi16(next0sum, next1sum); + thisavg = _mm_add_pi16(thisavg, bias); + nextavg = _mm_add_pi16(nextavg, bias); + thisavg = _mm_srli_pi16(thisavg, 2); + nextavg = _mm_srli_pi16(nextavg, 2); + + avg = _mm_packs_pu16(thisavg, nextavg); + + _mm_store_si64((__m64 *)&outptr[0], avg); + } + } +} |