mirror of https://github.com/axmolengine/axmol.git
270 lines
11 KiB
C
270 lines
11 KiB
C
|
/*
|
||
|
|
* AltiVec optimizations for libjpeg-turbo
|
||
|
|
*
|
||
|
|
* Copyright (C) 2014-2015, D. R. Commander. All Rights Reserved.
|
||
|
|
* Copyright (C) 2014, Jay Foad. All Rights Reserved.
|
||
|
|
*
|
||
|
|
* 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 jccolor-altivec.c */
|
||
|
|
|
||
|
|
|
||
|
|
void jsimd_rgb_ycc_convert_altivec(JDIMENSION img_width, JSAMPARRAY input_buf,
|
||
|
|
JSAMPIMAGE output_buf,
|
||
|
|
JDIMENSION output_row, int num_rows)
|
||
|
|
{
|
||
|
|
JSAMPROW inptr, outptr0, outptr1, outptr2;
|
||
|
|
int pitch = img_width * RGB_PIXELSIZE, num_cols;
|
||
|
|
#if __BIG_ENDIAN__
|
||
|
|
int offset;
|
||
|
|
#endif
|
||
|
|
unsigned char __attribute__((aligned(16))) tmpbuf[RGB_PIXELSIZE * 16];
|
||
|
|
|
||
|
|
__vector unsigned char rgb0, rgb1 = { 0 }, rgb2 = { 0 },
|
||
|
|
rgbg0, rgbg1, rgbg2, rgbg3, y, cb, cr;
|
||
|
|
#if __BIG_ENDIAN__ || RGB_PIXELSIZE == 4
|
||
|
|
__vector unsigned char rgb3 = { 0 };
|
||
|
|
#endif
|
||
|
|
#if __BIG_ENDIAN__ && RGB_PIXELSIZE == 4
|
||
|
|
__vector unsigned char rgb4 = { 0 };
|
||
|
|
#endif
|
||
|
|
__vector short rg0, rg1, rg2, rg3, bg0, bg1, bg2, bg3;
|
||
|
|
__vector unsigned short yl, yh, crl, crh, cbl, cbh;
|
||
|
|
__vector int y0, y1, y2, y3, cr0, cr1, cr2, cr3, cb0, cb1, cb2, cb3;
|
||
|
|
|
||
|
|
/* Constants */
|
||
|
|
__vector short pw_f0299_f0337 = { __4X2(F_0_299, F_0_337) },
|
||
|
|
pw_f0114_f0250 = { __4X2(F_0_114, F_0_250) },
|
||
|
|
pw_mf016_mf033 = { __4X2(-F_0_168, -F_0_331) },
|
||
|
|
pw_mf008_mf041 = { __4X2(-F_0_081, -F_0_418) };
|
||
|
|
__vector unsigned short pw_f050_f000 = { __4X2(F_0_500, 0) };
|
||
|
|
__vector int pd_onehalf = { __4X(ONE_HALF) },
|
||
|
|
pd_onehalfm1_cj = { __4X(ONE_HALF - 1 + (CENTERJSAMPLE << SCALEBITS)) };
|
||
|
|
__vector unsigned char pb_zero = { __16X(0) },
|
||
|
|
#if __BIG_ENDIAN__
|
||
|
|
shift_pack_index =
|
||
|
|
{ 0, 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29 };
|
||
|
|
#else
|
||
|
|
shift_pack_index =
|
||
|
|
{ 2, 3, 6, 7, 10, 11, 14, 15, 18, 19, 22, 23, 26, 27, 30, 31 };
|
||
|
|
#endif
|
||
|
|
|
||
|
|
while (--num_rows >= 0) {
|
||
|
|
inptr = *input_buf++;
|
||
|
|
outptr0 = output_buf[0][output_row];
|
||
|
|
outptr1 = output_buf[1][output_row];
|
||
|
|
outptr2 = output_buf[2][output_row];
|
||
|
|
output_row++;
|
||
|
|
|
||
|
|
for (num_cols = pitch; num_cols > 0;
|
||
|
|
num_cols -= RGB_PIXELSIZE * 16, inptr += RGB_PIXELSIZE * 16,
|
||
|
|
outptr0 += 16, outptr1 += 16, outptr2 += 16) {
|
||
|
|
|
||
|
|
#if __BIG_ENDIAN__
|
||
|
|
/* Load 16 pixels == 48 or 64 bytes */
|
||
|
|
offset = (size_t)inptr & 15;
|
||
|
|
if (offset) {
|
||
|
|
__vector unsigned char unaligned_shift_index;
|
||
|
|
int bytes = num_cols + offset;
|
||
|
|
|
||
|
|
if (bytes < (RGB_PIXELSIZE + 1) * 16 && (bytes & 15)) {
|
||
|
|
/* Slow path to prevent buffer overread. Since there is no way to
|
||
|
|
* read a partial AltiVec register, overread would occur on the last
|
||
|
|
* chunk of the last image row if the right edge is not on a 16-byte
|
||
|
|
* boundary. It could also occur on other rows if the bytes per row
|
||
|
|
* is low enough. Since we can't determine whether we're on the last
|
||
|
|
* image row, we have to assume every row is the last.
|
||
|
|
*/
|
||
|
|
memcpy(tmpbuf, inptr, min(num_cols, RGB_PIXELSIZE * 16));
|
||
|
|
rgb0 = vec_ld(0, tmpbuf);
|
||
|
|
rgb1 = vec_ld(16, tmpbuf);
|
||
|
|
rgb2 = vec_ld(32, tmpbuf);
|
||
|
|
#if RGB_PIXELSIZE == 4
|
||
|
|
rgb3 = vec_ld(48, tmpbuf);
|
||
|
|
#endif
|
||
|
|
} else {
|
||
|
|
/* Fast path */
|
||
|
|
rgb0 = vec_ld(0, inptr);
|
||
|
|
if (bytes > 16)
|
||
|
|
rgb1 = vec_ld(16, inptr);
|
||
|
|
if (bytes > 32)
|
||
|
|
rgb2 = vec_ld(32, inptr);
|
||
|
|
if (bytes > 48)
|
||
|
|
rgb3 = vec_ld(48, inptr);
|
||
|
|
#if RGB_PIXELSIZE == 4
|
||
|
|
if (bytes > 64)
|
||
|
|
rgb4 = vec_ld(64, inptr);
|
||
|
|
#endif
|
||
|
|
unaligned_shift_index = vec_lvsl(0, inptr);
|
||
|
|
rgb0 = vec_perm(rgb0, rgb1, unaligned_shift_index);
|
||
|
|
rgb1 = vec_perm(rgb1, rgb2, unaligned_shift_index);
|
||
|
|
rgb2 = vec_perm(rgb2, rgb3, unaligned_shift_index);
|
||
|
|
#if RGB_PIXELSIZE == 4
|
||
|
|
rgb3 = vec_perm(rgb3, rgb4, unaligned_shift_index);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
#endif /* __BIG_ENDIAN__ */
|
||
|
|
if (num_cols < RGB_PIXELSIZE * 16 && (num_cols & 15)) {
|
||
|
|
/* Slow path */
|
||
|
|
memcpy(tmpbuf, inptr, min(num_cols, RGB_PIXELSIZE * 16));
|
||
|
|
rgb0 = VEC_LD(0, tmpbuf);
|
||
|
|
rgb1 = VEC_LD(16, tmpbuf);
|
||
|
|
rgb2 = VEC_LD(32, tmpbuf);
|
||
|
|
#if RGB_PIXELSIZE == 4
|
||
|
|
rgb3 = VEC_LD(48, tmpbuf);
|
||
|
|
#endif
|
||
|
|
} else {
|
||
|
|
/* Fast path */
|
||
|
|
rgb0 = VEC_LD(0, inptr);
|
||
|
|
if (num_cols > 16)
|
||
|
|
rgb1 = VEC_LD(16, inptr);
|
||
|
|
if (num_cols > 32)
|
||
|
|
rgb2 = VEC_LD(32, inptr);
|
||
|
|
#if RGB_PIXELSIZE == 4
|
||
|
|
if (num_cols > 48)
|
||
|
|
rgb3 = VEC_LD(48, inptr);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
#if __BIG_ENDIAN__
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#if RGB_PIXELSIZE == 3
|
||
|
|
/* rgb0 = R0 G0 B0 R1 G1 B1 R2 G2 B2 R3 G3 B3 R4 G4 B4 R5
|
||
|
|
* rgb1 = G5 B5 R6 G6 B6 R7 G7 B7 R8 G8 B8 R9 G9 B9 Ra Ga
|
||
|
|
* rgb2 = Ba Rb Gb Bb Rc Gc Bc Rd Gd Bd Re Ge Be Rf Gf Bf
|
||
|
|
*
|
||
|
|
* rgbg0 = R0 G0 R1 G1 R2 G2 R3 G3 B0 G0 B1 G1 B2 G2 B3 G3
|
||
|
|
* rgbg1 = R4 G4 R5 G5 R6 G6 R7 G7 B4 G4 B5 G5 B6 G6 B7 G7
|
||
|
|
* rgbg2 = R8 G8 R9 G9 Ra Ga Rb Gb B8 G8 B9 G9 Ba Ga Bb Gb
|
||
|
|
* rgbg3 = Rc Gc Rd Gd Re Ge Rf Gf Bc Gc Bd Gd Be Ge Bf Gf
|
||
|
|
*/
|
||
|
|
rgbg0 = vec_perm(rgb0, rgb0, (__vector unsigned char)RGBG_INDEX0);
|
||
|
|
rgbg1 = vec_perm(rgb0, rgb1, (__vector unsigned char)RGBG_INDEX1);
|
||
|
|
rgbg2 = vec_perm(rgb1, rgb2, (__vector unsigned char)RGBG_INDEX2);
|
||
|
|
rgbg3 = vec_perm(rgb2, rgb2, (__vector unsigned char)RGBG_INDEX3);
|
||
|
|
#else
|
||
|
|
/* rgb0 = R0 G0 B0 X0 R1 G1 B1 X1 R2 G2 B2 X2 R3 G3 B3 X3
|
||
|
|
* rgb1 = R4 G4 B4 X4 R5 G5 B5 X5 R6 G6 B6 X6 R7 G7 B7 X7
|
||
|
|
* rgb2 = R8 G8 B8 X8 R9 G9 B9 X9 Ra Ga Ba Xa Rb Gb Bb Xb
|
||
|
|
* rgb3 = Rc Gc Bc Xc Rd Gd Bd Xd Re Ge Be Xe Rf Gf Bf Xf
|
||
|
|
*
|
||
|
|
* rgbg0 = R0 G0 R1 G1 R2 G2 R3 G3 B0 G0 B1 G1 B2 G2 B3 G3
|
||
|
|
* rgbg1 = R4 G4 R5 G5 R6 G6 R7 G7 B4 G4 B5 G5 B6 G6 B7 G7
|
||
|
|
* rgbg2 = R8 G8 R9 G9 Ra Ga Rb Gb B8 G8 B9 G9 Ba Ga Bb Gb
|
||
|
|
* rgbg3 = Rc Gc Rd Gd Re Ge Rf Gf Bc Gc Bd Gd Be Ge Bf Gf
|
||
|
|
*/
|
||
|
|
rgbg0 = vec_perm(rgb0, rgb0, (__vector unsigned char)RGBG_INDEX);
|
||
|
|
rgbg1 = vec_perm(rgb1, rgb1, (__vector unsigned char)RGBG_INDEX);
|
||
|
|
rgbg2 = vec_perm(rgb2, rgb2, (__vector unsigned char)RGBG_INDEX);
|
||
|
|
rgbg3 = vec_perm(rgb3, rgb3, (__vector unsigned char)RGBG_INDEX);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* rg0 = R0 G0 R1 G1 R2 G2 R3 G3
|
||
|
|
* bg0 = B0 G0 B1 G1 B2 G2 B3 G3
|
||
|
|
* ...
|
||
|
|
*
|
||
|
|
* NOTE: We have to use vec_merge*() here because vec_unpack*() doesn't
|
||
|
|
* support unsigned vectors.
|
||
|
|
*/
|
||
|
|
rg0 = (__vector signed short)VEC_UNPACKHU(rgbg0);
|
||
|
|
bg0 = (__vector signed short)VEC_UNPACKLU(rgbg0);
|
||
|
|
rg1 = (__vector signed short)VEC_UNPACKHU(rgbg1);
|
||
|
|
bg1 = (__vector signed short)VEC_UNPACKLU(rgbg1);
|
||
|
|
rg2 = (__vector signed short)VEC_UNPACKHU(rgbg2);
|
||
|
|
bg2 = (__vector signed short)VEC_UNPACKLU(rgbg2);
|
||
|
|
rg3 = (__vector signed short)VEC_UNPACKHU(rgbg3);
|
||
|
|
bg3 = (__vector signed short)VEC_UNPACKLU(rgbg3);
|
||
|
|
|
||
|
|
/* (Original)
|
||
|
|
* Y = 0.29900 * R + 0.58700 * G + 0.11400 * B
|
||
|
|
* Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE
|
||
|
|
* Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE
|
||
|
|
*
|
||
|
|
* (This implementation)
|
||
|
|
* Y = 0.29900 * R + 0.33700 * G + 0.11400 * B + 0.25000 * G
|
||
|
|
* Cb = -0.16874 * R - 0.33126 * G + 0.50000 * B + CENTERJSAMPLE
|
||
|
|
* Cr = 0.50000 * R - 0.41869 * G - 0.08131 * B + CENTERJSAMPLE
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* Calculate Y values */
|
||
|
|
|
||
|
|
y0 = vec_msums(rg0, pw_f0299_f0337, pd_onehalf);
|
||
|
|
y1 = vec_msums(rg1, pw_f0299_f0337, pd_onehalf);
|
||
|
|
y2 = vec_msums(rg2, pw_f0299_f0337, pd_onehalf);
|
||
|
|
y3 = vec_msums(rg3, pw_f0299_f0337, pd_onehalf);
|
||
|
|
y0 = vec_msums(bg0, pw_f0114_f0250, y0);
|
||
|
|
y1 = vec_msums(bg1, pw_f0114_f0250, y1);
|
||
|
|
y2 = vec_msums(bg2, pw_f0114_f0250, y2);
|
||
|
|
y3 = vec_msums(bg3, pw_f0114_f0250, y3);
|
||
|
|
/* Clever way to avoid 4 shifts + 2 packs. This packs the high word from
|
||
|
|
* each dword into a new 16-bit vector, which is the equivalent of
|
||
|
|
* descaling the 32-bit results (right-shifting by 16 bits) and then
|
||
|
|
* packing them.
|
||
|
|
*/
|
||
|
|
yl = vec_perm((__vector unsigned short)y0, (__vector unsigned short)y1,
|
||
|
|
shift_pack_index);
|
||
|
|
yh = vec_perm((__vector unsigned short)y2, (__vector unsigned short)y3,
|
||
|
|
shift_pack_index);
|
||
|
|
y = vec_pack(yl, yh);
|
||
|
|
vec_st(y, 0, outptr0);
|
||
|
|
|
||
|
|
/* Calculate Cb values */
|
||
|
|
cb0 = vec_msums(rg0, pw_mf016_mf033, pd_onehalfm1_cj);
|
||
|
|
cb1 = vec_msums(rg1, pw_mf016_mf033, pd_onehalfm1_cj);
|
||
|
|
cb2 = vec_msums(rg2, pw_mf016_mf033, pd_onehalfm1_cj);
|
||
|
|
cb3 = vec_msums(rg3, pw_mf016_mf033, pd_onehalfm1_cj);
|
||
|
|
cb0 = (__vector int)vec_msum((__vector unsigned short)bg0, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cb0);
|
||
|
|
cb1 = (__vector int)vec_msum((__vector unsigned short)bg1, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cb1);
|
||
|
|
cb2 = (__vector int)vec_msum((__vector unsigned short)bg2, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cb2);
|
||
|
|
cb3 = (__vector int)vec_msum((__vector unsigned short)bg3, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cb3);
|
||
|
|
cbl = vec_perm((__vector unsigned short)cb0,
|
||
|
|
(__vector unsigned short)cb1, shift_pack_index);
|
||
|
|
cbh = vec_perm((__vector unsigned short)cb2,
|
||
|
|
(__vector unsigned short)cb3, shift_pack_index);
|
||
|
|
cb = vec_pack(cbl, cbh);
|
||
|
|
vec_st(cb, 0, outptr1);
|
||
|
|
|
||
|
|
/* Calculate Cr values */
|
||
|
|
cr0 = vec_msums(bg0, pw_mf008_mf041, pd_onehalfm1_cj);
|
||
|
|
cr1 = vec_msums(bg1, pw_mf008_mf041, pd_onehalfm1_cj);
|
||
|
|
cr2 = vec_msums(bg2, pw_mf008_mf041, pd_onehalfm1_cj);
|
||
|
|
cr3 = vec_msums(bg3, pw_mf008_mf041, pd_onehalfm1_cj);
|
||
|
|
cr0 = (__vector int)vec_msum((__vector unsigned short)rg0, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cr0);
|
||
|
|
cr1 = (__vector int)vec_msum((__vector unsigned short)rg1, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cr1);
|
||
|
|
cr2 = (__vector int)vec_msum((__vector unsigned short)rg2, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cr2);
|
||
|
|
cr3 = (__vector int)vec_msum((__vector unsigned short)rg3, pw_f050_f000,
|
||
|
|
(__vector unsigned int)cr3);
|
||
|
|
crl = vec_perm((__vector unsigned short)cr0,
|
||
|
|
(__vector unsigned short)cr1, shift_pack_index);
|
||
|
|
crh = vec_perm((__vector unsigned short)cr2,
|
||
|
|
(__vector unsigned short)cr3, shift_pack_index);
|
||
|
|
cr = vec_pack(crl, crh);
|
||
|
|
vec_st(cr, 0, outptr2);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|