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Diffstat (limited to 'media/libjpeg/simd/mips64/jquanti-mmi.c')
| -rw-r--r-- | media/libjpeg/simd/mips64/jquanti-mmi.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/media/libjpeg/simd/mips64/jquanti-mmi.c b/media/libjpeg/simd/mips64/jquanti-mmi.c new file mode 100644 index 0000000000..339002fd80 --- /dev/null +++ b/media/libjpeg/simd/mips64/jquanti-mmi.c @@ -0,0 +1,124 @@ +/* + * Loongson MMI optimizations for libjpeg-turbo + * + * 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> + * Copyright (C) 2018-2019, D. R. Commander. All Rights Reserved. + * + * 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. + */ + +/* INTEGER QUANTIZATION AND SAMPLE CONVERSION */ + +#include "jsimd_mmi.h" + + +#define DO_QUANT() { \ + __m64 rowl, rowh, rowls, rowhs, rowlsave, rowhsave; \ + __m64 corrl, corrh, recipl, reciph, scalel, scaleh; \ + \ + rowl = _mm_load_si64((__m64 *)&workspace[0]); \ + rowh = _mm_load_si64((__m64 *)&workspace[4]); \ + \ + /* Branch-less absolute value */ \ + rowls = _mm_srai_pi16(rowl, (WORD_BIT - 1)); /* -1 if value < 0, */ \ + /* 0 otherwise */ \ + rowhs = _mm_srai_pi16(rowh, (WORD_BIT - 1)); \ + \ + rowl = _mm_xor_si64(rowl, rowls); /* val = -val */ \ + rowh = _mm_xor_si64(rowh, rowhs); \ + rowl = _mm_sub_pi16(rowl, rowls); \ + rowh = _mm_sub_pi16(rowh, rowhs); \ + \ + corrl = _mm_load_si64((__m64 *)&divisors[DCTSIZE2 * 1]); /* correction */ \ + corrh = _mm_load_si64((__m64 *)&divisors[DCTSIZE2 * 1 + 4]); \ + \ + rowlsave = rowl = _mm_add_pi16(rowl, corrl); /* correction + roundfactor */ \ + rowhsave = rowh = _mm_add_pi16(rowh, corrh); \ + \ + recipl = _mm_load_si64((__m64 *)&divisors[DCTSIZE2 * 0]); /* reciprocal */ \ + reciph = _mm_load_si64((__m64 *)&divisors[DCTSIZE2 * 0 + 4]); \ + \ + rowl = _mm_mulhi_pi16(rowl, recipl); \ + rowh = _mm_mulhi_pi16(rowh, reciph); \ + \ + /* reciprocal is always negative (MSB=1), so we always need to add the */ \ + /* initial value (input value is never negative as we inverted it at the */ \ + /* start of this routine) */ \ + rowlsave = rowl = _mm_add_pi16(rowl, rowlsave); \ + rowhsave = rowh = _mm_add_pi16(rowh, rowhsave); \ + \ + scalel = _mm_load_si64((__m64 *)&divisors[DCTSIZE2 * 2]); /* scale */ \ + scaleh = _mm_load_si64((__m64 *)&divisors[DCTSIZE2 * 2 + 4]); \ + \ + rowl = _mm_mulhi_pi16(rowl, scalel); \ + rowh = _mm_mulhi_pi16(rowh, scaleh); \ + \ + /* determine if scale is negative */ \ + scalel = _mm_srai_pi16(scalel, (WORD_BIT - 1)); \ + scaleh = _mm_srai_pi16(scaleh, (WORD_BIT - 1)); \ + \ + /* and add input if it is */ \ + scalel = _mm_and_si64(scalel, rowlsave); \ + scaleh = _mm_and_si64(scaleh, rowhsave); \ + rowl = _mm_add_pi16(rowl, scalel); \ + rowh = _mm_add_pi16(rowh, scaleh); \ + \ + /* then check if negative input */ \ + rowlsave = _mm_srai_pi16(rowlsave, (WORD_BIT - 1)); \ + rowhsave = _mm_srai_pi16(rowhsave, (WORD_BIT - 1)); \ + \ + /* and add scale if it is */ \ + rowlsave = _mm_and_si64(rowlsave, scalel); \ + rowhsave = _mm_and_si64(rowhsave, scaleh); \ + rowl = _mm_add_pi16(rowl, rowlsave); \ + rowh = _mm_add_pi16(rowh, rowhsave); \ + \ + rowl = _mm_xor_si64(rowl, rowls); /* val = -val */ \ + rowh = _mm_xor_si64(rowh, rowhs); \ + rowl = _mm_sub_pi16(rowl, rowls); \ + rowh = _mm_sub_pi16(rowh, rowhs); \ + \ + _mm_store_si64((__m64 *)&output_ptr[0], rowl); \ + _mm_store_si64((__m64 *)&output_ptr[4], rowh); \ + \ + workspace += DCTSIZE; \ + divisors += DCTSIZE; \ + output_ptr += DCTSIZE; \ +} + + +void jsimd_quantize_mmi(JCOEFPTR coef_block, DCTELEM *divisors, + DCTELEM *workspace) +{ + JCOEFPTR output_ptr = coef_block; + + DO_QUANT() + DO_QUANT() + DO_QUANT() + DO_QUANT() + DO_QUANT() + DO_QUANT() + DO_QUANT() + DO_QUANT() +} |