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/*
* Loongson MMI optimizations for libjpeg-turbo
*
* Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB
* Copyright (C) 2014-2015, 2019, D. R. Commander. All Rights Reserved.
* Copyright (C) 2016-2018, Loongson Technology Corporation Limited, BeiJing.
* All Rights Reserved.
* Authors: ZhangLixia <zhanglixia-hf@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.
*/
/* This file is included by jcgray-mmi.c */
#if RGB_RED == 0
#define mmA re
#define mmB ro
#elif RGB_GREEN == 0
#define mmA ge
#define mmB go
#elif RGB_BLUE == 0
#define mmA be
#define mmB bo
#else
#define mmA xe
#define mmB xo
#endif
#if RGB_RED == 1
#define mmC re
#define mmD ro
#elif RGB_GREEN == 1
#define mmC ge
#define mmD go
#elif RGB_BLUE == 1
#define mmC be
#define mmD bo
#else
#define mmC xe
#define mmD xo
#endif
#if RGB_RED == 2
#define mmE re
#define mmF ro
#elif RGB_GREEN == 2
#define mmE ge
#define mmF go
#elif RGB_BLUE == 2
#define mmE be
#define mmF bo
#else
#define mmE xe
#define mmF xo
#endif
#if RGB_RED == 3
#define mmG re
#define mmH ro
#elif RGB_GREEN == 3
#define mmG ge
#define mmH go
#elif RGB_BLUE == 3
#define mmG be
#define mmH bo
#else
#define mmG xe
#define mmH xo
#endif
void jsimd_rgb_gray_convert_mmi(JDIMENSION image_width, JSAMPARRAY input_buf,
JSAMPIMAGE output_buf, JDIMENSION output_row,
int num_rows)
{
JSAMPROW inptr, outptr;
int num_cols, col;
__m64 re, ro, ge, go, be, bo, xe;
#if RGB_PIXELSIZE == 4
__m64 xo;
#endif
__m64 rgle, rghe, rglo, rgho, bgle, bghe, bglo, bgho;
__m64 yle_rg, yhe_rg, yle_bg, yhe_bg, yle, yhe, ye;
__m64 ylo_rg, yho_rg, ylo_bg, yho_bg, ylo, yho, yo, y;
while (--num_rows >= 0) {
inptr = *input_buf++;
outptr = output_buf[0][output_row];
output_row++;
for (num_cols = image_width; num_cols > 0; num_cols -= 8,
outptr += 8) {
#if RGB_PIXELSIZE == 3
if (num_cols < 8) {
col = num_cols * 3;
asm(".set noreorder\r\n"
"li $8, 1\r\n"
"move $9, %3\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 1f\r\n"
"nop \r\n"
"subu $9, $9, 1\r\n"
"xor $12, $12, $12\r\n"
"move $13, %5\r\n"
PTR_ADDU "$13, $13, $9\r\n"
"lbu $12, 0($13)\r\n"
"1: \r\n"
"li $8, 2\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 2f\r\n"
"nop \r\n"
"subu $9, $9, 2\r\n"
"xor $11, $11, $11\r\n"
"move $13, %5\r\n"
PTR_ADDU "$13, $13, $9\r\n"
"lhu $11, 0($13)\r\n"
"sll $12, $12, 16\r\n"
"or $12, $12, $11\r\n"
"2: \r\n"
"dmtc1 $12, %0\r\n"
"li $8, 4\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 3f\r\n"
"nop \r\n"
"subu $9, $9, 4\r\n"
"move $13, %5\r\n"
PTR_ADDU "$13, $13, $9\r\n"
"lwu $14, 0($13)\r\n"
"dmtc1 $14, %1\r\n"
"dsll32 $12, $12, 0\r\n"
"or $12, $12, $14\r\n"
"dmtc1 $12, %0\r\n"
"3: \r\n"
"li $8, 8\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 4f\r\n"
"nop \r\n"
"mov.s %1, %0\r\n"
"ldc1 %0, 0(%5)\r\n"
"li $9, 8\r\n"
"j 5f\r\n"
"nop \r\n"
"4: \r\n"
"li $8, 16\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 5f\r\n"
"nop \r\n"
"mov.s %2, %0\r\n"
"ldc1 %0, 0(%5)\r\n"
"ldc1 %1, 8(%5)\r\n"
"5: \r\n"
"nop \r\n"
".set reorder\r\n"
: "=f" (mmA), "=f" (mmG), "=f" (mmF)
: "r" (col), "r" (num_rows), "r" (inptr)
: "$f0", "$f2", "$f4", "$8", "$9", "$10", "$11", "$12", "$13",
"$14", "memory"
);
} else {
if (!(((long)inptr) & 7)) {
mmA = _mm_load_si64((__m64 *)&inptr[0]);
mmG = _mm_load_si64((__m64 *)&inptr[8]);
mmF = _mm_load_si64((__m64 *)&inptr[16]);
} else {
mmA = _mm_loadu_si64((__m64 *)&inptr[0]);
mmG = _mm_loadu_si64((__m64 *)&inptr[8]);
mmF = _mm_loadu_si64((__m64 *)&inptr[16]);
}
inptr += RGB_PIXELSIZE * 8;
}
mmD = _mm_srli_si64(mmA, 4 * BYTE_BIT);
mmA = _mm_slli_si64(mmA, 4 * BYTE_BIT);
mmA = _mm_unpackhi_pi8(mmA, mmG);
mmG = _mm_slli_si64(mmG, 4 * BYTE_BIT);
mmD = _mm_unpacklo_pi8(mmD, mmF);
mmG = _mm_unpackhi_pi8(mmG, mmF);
mmE = _mm_srli_si64(mmA, 4 * BYTE_BIT);
mmA = _mm_slli_si64(mmA, 4 * BYTE_BIT);
mmA = _mm_unpackhi_pi8(mmA, mmD);
mmD = _mm_slli_si64(mmD, 4 * BYTE_BIT);
mmE = _mm_unpacklo_pi8(mmE, mmG);
mmD = _mm_unpackhi_pi8(mmD, mmG);
mmC = _mm_loadhi_pi8_f(mmA);
mmA = _mm_loadlo_pi8_f(mmA);
mmB = _mm_loadhi_pi8_f(mmE);
mmE = _mm_loadlo_pi8_f(mmE);
mmF = _mm_loadhi_pi8_f(mmD);
mmD = _mm_loadlo_pi8_f(mmD);
#else /* RGB_PIXELSIZE == 4 */
if (num_cols < 8) {
col = num_cols;
asm(".set noreorder\r\n"
"li $8, 1\r\n"
"move $9, %4\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 1f\r\n"
"nop \r\n"
"subu $9, $9, 1\r\n"
PTR_SLL "$11, $9, 2\r\n"
"move $13, %5\r\n"
PTR_ADDU "$13, $13, $11\r\n"
"lwc1 %0, 0($13)\r\n"
"1: \r\n"
"li $8, 2\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 2f\r\n"
"nop \r\n"
"subu $9, $9, 2\r\n"
PTR_SLL "$11, $9, 2\r\n"
"move $13, %5\r\n"
PTR_ADDU "$13, $13, $11\r\n"
"mov.s %1, %0\r\n"
"ldc1 %0, 0($13)\r\n"
"2: \r\n"
"li $8, 4\r\n"
"and $10, $9, $8\r\n"
"beqz $10, 3f\r\n"
"nop \r\n"
"mov.s %2, %0\r\n"
"mov.s %3, %1\r\n"
"ldc1 %0, 0(%5)\r\n"
"ldc1 %1, 8(%5)\r\n"
"3: \r\n"
"nop \r\n"
".set reorder\r\n"
: "=f" (mmA), "=f" (mmF), "=f" (mmD), "=f" (mmC)
: "r" (col), "r" (inptr)
: "$f0", "$f2", "$8", "$9", "$10", "$11", "$13", "memory"
);
} else {
if (!(((long)inptr) & 7)) {
mmA = _mm_load_si64((__m64 *)&inptr[0]);
mmF = _mm_load_si64((__m64 *)&inptr[8]);
mmD = _mm_load_si64((__m64 *)&inptr[16]);
mmC = _mm_load_si64((__m64 *)&inptr[24]);
} else {
mmA = _mm_loadu_si64((__m64 *)&inptr[0]);
mmF = _mm_loadu_si64((__m64 *)&inptr[8]);
mmD = _mm_loadu_si64((__m64 *)&inptr[16]);
mmC = _mm_loadu_si64((__m64 *)&inptr[24]);
}
inptr += RGB_PIXELSIZE * 8;
}
mmB = _mm_unpackhi_pi8(mmA, mmF);
mmA = _mm_unpacklo_pi8(mmA, mmF);
mmG = _mm_unpackhi_pi8(mmD, mmC);
mmD = _mm_unpacklo_pi8(mmD, mmC);
mmE = _mm_unpackhi_pi16(mmA, mmD);
mmA = _mm_unpacklo_pi16(mmA, mmD);
mmH = _mm_unpackhi_pi16(mmB, mmG);
mmB = _mm_unpacklo_pi16(mmB, mmG);
mmC = _mm_loadhi_pi8_f(mmA);
mmA = _mm_loadlo_pi8_f(mmA);
mmD = _mm_loadhi_pi8_f(mmB);
mmB = _mm_loadlo_pi8_f(mmB);
mmG = _mm_loadhi_pi8_f(mmE);
mmE = _mm_loadlo_pi8_f(mmE);
mmF = _mm_unpacklo_pi8(mmH, mmH);
mmH = _mm_unpackhi_pi8(mmH, mmH);
mmF = _mm_srli_pi16(mmF, BYTE_BIT);
mmH = _mm_srli_pi16(mmH, BYTE_BIT);
#endif
/* re=(R0 R2 R4 R6), ge=(G0 G2 G4 G6), be=(B0 B2 B4 B6)
* ro=(R1 R3 R5 R7), go=(G1 G3 G5 G7), bo=(B1 B3 B5 B7)
*
* (Original)
* Y = 0.29900 * R + 0.58700 * G + 0.11400 * B
*
* (This implementation)
* Y = 0.29900 * R + 0.33700 * G + 0.11400 * B + 0.25000 * G
*/
rglo = _mm_unpacklo_pi16(ro, go);
rgho = _mm_unpackhi_pi16(ro, go);
ylo_rg = _mm_madd_pi16(rglo, PW_F0299_F0337);
yho_rg = _mm_madd_pi16(rgho, PW_F0299_F0337);
rgle = _mm_unpacklo_pi16(re, ge);
rghe = _mm_unpackhi_pi16(re, ge);
yle_rg = _mm_madd_pi16(rgle, PW_F0299_F0337);
yhe_rg = _mm_madd_pi16(rghe, PW_F0299_F0337);
bglo = _mm_unpacklo_pi16(bo, go);
bgho = _mm_unpackhi_pi16(bo, go);
ylo_bg = _mm_madd_pi16(bglo, PW_F0114_F0250);
yho_bg = _mm_madd_pi16(bgho, PW_F0114_F0250);
ylo = _mm_add_pi32(ylo_bg, ylo_rg);
yho = _mm_add_pi32(yho_bg, yho_rg);
ylo = _mm_add_pi32(ylo, PD_ONEHALF);
yho = _mm_add_pi32(yho, PD_ONEHALF);
ylo = _mm_srli_pi32(ylo, SCALEBITS);
yho = _mm_srli_pi32(yho, SCALEBITS);
yo = _mm_packs_pi32(ylo, yho);
bgle = _mm_unpacklo_pi16(be, ge);
bghe = _mm_unpackhi_pi16(be, ge);
yle_bg = _mm_madd_pi16(bgle, PW_F0114_F0250);
yhe_bg = _mm_madd_pi16(bghe, PW_F0114_F0250);
yle = _mm_add_pi32(yle_bg, yle_rg);
yhe = _mm_add_pi32(yhe_bg, yhe_rg);
yle = _mm_add_pi32(yle, PD_ONEHALF);
yhe = _mm_add_pi32(yhe, PD_ONEHALF);
yle = _mm_srli_pi32(yle, SCALEBITS);
yhe = _mm_srli_pi32(yhe, SCALEBITS);
ye = _mm_packs_pi32(yle, yhe);
yo = _mm_slli_pi16(yo, BYTE_BIT);
y = _mm_or_si64(ye, yo);
_mm_store_si64((__m64 *)&outptr[0], y);
}
}
}
#undef mmA
#undef mmB
#undef mmC
#undef mmD
#undef mmE
#undef mmF
#undef mmG
#undef mmH