--- /dev/null
+/*
+ * AltiVec optimizations for libjpeg-turbo
+ *
+ * Copyright (C) 2014, D. R. Commander.
+ * 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;
+ JSAMPROW outptr0, outptr1, outptr2;
+ int pitch;
+ __vector unsigned char rgb0, rgb1 = {0}, rgb2 = {0}, rgb3 = {0}, rgbg0,
+ rgbg1, rgbg2, rgbg3, y, cb, cr;
+#if RGB_PIXELSIZE == 4
+ __vector unsigned char rgb4;
+#endif
+ __vector short rg0, rg1, rg2, rg3, bg0, bg1, bg2, bg3;
+ __vector unsigned short y01, y23, cr01, cr23, cb01, cb23;
+ __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 zero = { __16X(0) },
+ shift_pack_index =
+ { 0, 1, 4, 5, 8, 9, 12, 13, 16, 17, 20, 21, 24, 25, 28, 29};
+
+ 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 (pitch = img_width * RGB_PIXELSIZE; pitch > 0;
+ pitch -= RGB_PIXELSIZE * 16, inptr += RGB_PIXELSIZE * 16,
+ outptr0 += 16, outptr1 += 16, outptr2 += 16) {
+
+#if RGB_PIXELSIZE == 3
+ /* Load 16 pixels == 48 bytes */
+ if ((size_t)inptr & 15) {
+ __vector unsigned char unaligned_shift_index;
+ rgb0 = vec_ld(0, inptr);
+ if (pitch > 16)
+ rgb1 = vec_ld(16, inptr);
+ else
+ rgb1 = vec_ld(-1, inptr + pitch);
+ if (pitch > 32)
+ rgb2 = vec_ld(32, inptr);
+ else
+ rgb2 = vec_ld(-1, inptr + pitch);
+ if (pitch > 48)
+ rgb3 = vec_ld(48, inptr);
+ else
+ rgb3 = vec_ld(-1, inptr + pitch);
+ 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);
+ } else {
+ rgb0 = vec_ld(0, inptr);
+ if (pitch > 16)
+ rgb1 = vec_ld(16, inptr);
+ if (pitch > 32)
+ rgb2 = vec_ld(32, inptr);
+ }
+
+ /* 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
+ /* Load 16 pixels == 64 bytes */
+ if ((size_t)inptr & 15) {
+ __vector unsigned char unaligned_shift_index;
+ rgb0 = vec_ld(0, inptr);
+ if (pitch > 16)
+ rgb1 = vec_ld(16, inptr);
+ else
+ rgb1 = vec_ld(-1, inptr + pitch);
+ if (pitch > 32)
+ rgb2 = vec_ld(32, inptr);
+ else
+ rgb2 = vec_ld(-1, inptr + pitch);
+ if (pitch > 48)
+ rgb3 = vec_ld(48, inptr);
+ else
+ rgb3 = vec_ld(-1, inptr + pitch);
+ if (pitch > 64)
+ rgb4 = vec_ld(64, inptr);
+ else
+ rgb4 = vec_ld(-1, inptr + pitch);
+ 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);
+ rgb3 = vec_perm(rgb3, rgb4, unaligned_shift_index);
+ } else {
+ rgb0 = vec_ld(0, inptr);
+ if (pitch > 16)
+ rgb1 = vec_ld(16, inptr);
+ if (pitch > 32)
+ rgb2 = vec_ld(32, inptr);
+ if (pitch > 48)
+ rgb3 = vec_ld(48, inptr);
+ }
+
+ /* rgb0 = R0 G0 B0 X0 R1 G1 B1 X1 R2 G2 B2 X2 R3 G3 B3 X3
+ * rgb0 = R4 G4 B4 X4 R5 G5 B5 X5 R6 G6 B6 X6 R7 G7 B7 X7
+ * rgb0 = R8 G8 B8 X8 R9 G9 B9 X9 Ra Ga Ba Xa Rb Gb Bb Xb
+ * rgb0 = 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_mergeh(zero, rgbg0);
+ bg0 = (__vector signed short)vec_mergel(zero, rgbg0);
+ rg1 = (__vector signed short)vec_mergeh(zero, rgbg1);
+ bg1 = (__vector signed short)vec_mergel(zero, rgbg1);
+ rg2 = (__vector signed short)vec_mergeh(zero, rgbg2);
+ bg2 = (__vector signed short)vec_mergel(zero, rgbg2);
+ rg3 = (__vector signed short)vec_mergeh(zero, rgbg3);
+ bg3 = (__vector signed short)vec_mergel(zero, 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.
+ */
+ y01 = vec_perm((__vector unsigned short)y0, (__vector unsigned short)y1,
+ shift_pack_index);
+ y23 = vec_perm((__vector unsigned short)y2, (__vector unsigned short)y3,
+ shift_pack_index);
+ y = vec_pack(y01, y23);
+ 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);
+ cb01 = vec_perm((__vector unsigned short)cb0,
+ (__vector unsigned short)cb1, shift_pack_index);
+ cb23 = vec_perm((__vector unsigned short)cb2,
+ (__vector unsigned short)cb3, shift_pack_index);
+ cb = vec_pack(cb01, cb23);
+ 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);
+ cr01 = vec_perm((__vector unsigned short)cr0,
+ (__vector unsigned short)cr1, shift_pack_index);
+ cr23 = vec_perm((__vector unsigned short)cr2,
+ (__vector unsigned short)cr3, shift_pack_index);
+ cr = vec_pack(cr01, cr23);
+ vec_st(cr, 0, outptr2);
+ }
+ }
+}
--- /dev/null
+/*
+ * AltiVec optimizations for libjpeg-turbo
+ *
+ * Copyright (C) 2014, D. R. Commander.
+ * 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.
+ */
+
+/* RGB --> YCC CONVERSION */
+
+#include "jsimd_altivec.h"
+
+
+#define F_0_081 5329 /* FIX(0.08131) */
+#define F_0_114 7471 /* FIX(0.11400) */
+#define F_0_168 11059 /* FIX(0.16874) */
+#define F_0_250 16384 /* FIX(0.25000) */
+#define F_0_299 19595 /* FIX(0.29900) */
+#define F_0_331 21709 /* FIX(0.33126) */
+#define F_0_418 27439 /* FIX(0.41869) */
+#define F_0_500 32768 /* FIX(0.50000) */
+#define F_0_587 38470 /* FIX(0.58700) */
+#define F_0_337 (F_0_587 - F_0_250) /* FIX(0.58700) - FIX(0.25000) */
+
+#define SCALEBITS 16
+#define ONE_HALF (1 << (SCALEBITS - 1))
+
+
+#define RGBG_INDEX0 {0,1,3,4,6,7,9,10,2,1,5,4,8,7,11,10}
+#define RGBG_INDEX1 {12,13,15,16,18,19,21,22,14,13,17,16,20,19,23,22}
+#define RGBG_INDEX2 {8,9,11,12,14,15,17,18,10,9,13,12,16,15,19,18}
+#define RGBG_INDEX3 {4,5,7,8,10,11,13,14,6,5,9,8,12,11,15,14}
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+
+#define RGB_RED EXT_RGB_RED
+#define RGB_GREEN EXT_RGB_GREEN
+#define RGB_BLUE EXT_RGB_BLUE
+#define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
+#define jsimd_rgb_ycc_convert_altivec jsimd_extrgb_ycc_convert_altivec
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef RGBG_INDEX0
+#undef RGBG_INDEX1
+#undef RGBG_INDEX2
+#undef RGBG_INDEX3
+#undef jsimd_rgb_ycc_convert_altivec
+
+#define RGB_RED EXT_RGBX_RED
+#define RGB_GREEN EXT_RGBX_GREEN
+#define RGB_BLUE EXT_RGBX_BLUE
+#define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
+#define RGBG_INDEX {0,1,4,5,8,9,12,13,2,1,6,5,10,9,14,13}
+#define jsimd_rgb_ycc_convert_altivec jsimd_extrgbx_ycc_convert_altivec
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef RGBG_INDEX
+#undef jsimd_rgb_ycc_convert_altivec
+
+#define RGB_RED EXT_BGR_RED
+#define RGB_GREEN EXT_BGR_GREEN
+#define RGB_BLUE EXT_BGR_BLUE
+#define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
+#define RGBG_INDEX0 {2,1,5,4,8,7,11,10,0,1,3,4,6,7,9,10}
+#define RGBG_INDEX1 {14,13,17,16,20,19,23,22,12,13,15,16,18,19,21,22}
+#define RGBG_INDEX2 {10,9,13,12,16,15,19,18,8,9,11,12,14,15,17,18}
+#define RGBG_INDEX3 {6,5,9,8,12,11,15,14,4,5,7,8,10,11,13,14}
+#define jsimd_rgb_ycc_convert_altivec jsimd_extbgr_ycc_convert_altivec
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef RGBG_INDEX0
+#undef RGBG_INDEX1
+#undef RGBG_INDEX2
+#undef RGBG_INDEX3
+#undef jsimd_rgb_ycc_convert_altivec
+
+#define RGB_RED EXT_BGRX_RED
+#define RGB_GREEN EXT_BGRX_GREEN
+#define RGB_BLUE EXT_BGRX_BLUE
+#define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
+#define RGBG_INDEX {2,1,6,5,10,9,14,13,0,1,4,5,8,9,12,13}
+#define jsimd_rgb_ycc_convert_altivec jsimd_extbgrx_ycc_convert_altivec
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef RGBG_INDEX
+#undef jsimd_rgb_ycc_convert_altivec
+
+#define RGB_RED EXT_XBGR_RED
+#define RGB_GREEN EXT_XBGR_GREEN
+#define RGB_BLUE EXT_XBGR_BLUE
+#define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
+#define RGBG_INDEX {3,2,7,6,11,10,15,14,1,2,5,6,9,10,13,14}
+#define jsimd_rgb_ycc_convert_altivec jsimd_extxbgr_ycc_convert_altivec
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef RGBG_INDEX
+#undef jsimd_rgb_ycc_convert_altivec
+
+#define RGB_RED EXT_XRGB_RED
+#define RGB_GREEN EXT_XRGB_GREEN
+#define RGB_BLUE EXT_XRGB_BLUE
+#define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
+#define RGBG_INDEX {1,2,5,6,9,10,13,14,3,2,7,6,11,10,15,14}
+#define jsimd_rgb_ycc_convert_altivec jsimd_extxrgb_ycc_convert_altivec
+#include "jccolext-altivec.c"
+#undef RGB_RED
+#undef RGB_GREEN
+#undef RGB_BLUE
+#undef RGB_PIXELSIZE
+#undef RGBG_INDEX
+#undef jsimd_rgb_ycc_convert_altivec
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