The Tor Browser / file comparison

comparison: gfx/qcms/transform-altivec.c

gfx/qcms/transform-altivec.c

branch
TOR_BUG_3246
changeset 7
129ffea94266
equal deleted inserted replaced
-1:000000000000 0:a4a4c03e9cbe
1 /* vim: set ts=8 sw=8 noexpandtab: */
2 // qcms
3 // Copyright (C) 2009 Mozilla Corporation
4 // Copyright (C) 1998-2007 Marti Maria
5 //
6 // Permission is hereby granted, free of charge, to any person obtaining
7 // a copy of this software and associated documentation files (the "Software"),
8 // to deal in the Software without restriction, including without limitation
9 // the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 // and/or sell copies of the Software, and to permit persons to whom the Software
11 // is furnished to do so, subject to the following conditions:
12 //
13 // The above copyright notice and this permission notice shall be included in
14 // all copies or substantial portions of the Software.
15 //
16 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
17 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO
18 // THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
19 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
20 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
21 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
22 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23
24 #include <altivec.h>
25
26 #include "qcmsint.h"
27
28 #define FLOATSCALE (float)(PRECACHE_OUTPUT_SIZE)
29 #define CLAMPMAXVAL (((float) (PRECACHE_OUTPUT_SIZE - 1)) / PRECACHE_OUTPUT_SIZE)
30 static const ALIGN float floatScaleX4 = FLOATSCALE;
31 static const ALIGN float clampMaxValueX4 = CLAMPMAXVAL;
32
33 inline vector float load_aligned_float(float *dataPtr)
34 {
35 vector float data = vec_lde(0, dataPtr);
36 vector unsigned char moveToStart = vec_lvsl(0, dataPtr);
37 return vec_perm(data, data, moveToStart);
38 }
39
40 void qcms_transform_data_rgb_out_lut_altivec(qcms_transform *transform,
41 unsigned char *src,
42 unsigned char *dest,
43 size_t length)
44 {
45 unsigned int i;
46 float (*mat)[4] = transform->matrix;
47 char input_back[32];
48 /* Ensure we have a buffer that's 16 byte aligned regardless of the original
49 * stack alignment. We can't use __attribute__((aligned(16))) or __declspec(align(32))
50 * because they don't work on stack variables. gcc 4.4 does do the right thing
51 * on x86 but that's too new for us right now. For more info: gcc bug #16660 */
52 float const *input = (float*)(((uintptr_t)&input_back[16]) & ~0xf);
53 /* share input and output locations to save having to keep the
54 * locations in separate registers */
55 uint32_t const *output = (uint32_t*)input;
56
57 /* deref *transform now to avoid it in loop */
58 const float *igtbl_r = transform->input_gamma_table_r;
59 const float *igtbl_g = transform->input_gamma_table_g;
60 const float *igtbl_b = transform->input_gamma_table_b;
61
62 /* deref *transform now to avoid it in loop */
63 const uint8_t *otdata_r = &transform->output_table_r->data[0];
64 const uint8_t *otdata_g = &transform->output_table_g->data[0];
65 const uint8_t *otdata_b = &transform->output_table_b->data[0];
66
67 /* input matrix values never change */
68 const vector float mat0 = vec_ldl(0, (vector float*)mat[0]);
69 const vector float mat1 = vec_ldl(0, (vector float*)mat[1]);
70 const vector float mat2 = vec_ldl(0, (vector float*)mat[2]);
71
72 /* these values don't change, either */
73 const vector float max = vec_splat(vec_lde(0, (float*)&clampMaxValueX4), 0);
74 const vector float min = (vector float)vec_splat_u32(0);
75 const vector float scale = vec_splat(vec_lde(0, (float*)&floatScaleX4), 0);
76
77 /* working variables */
78 vector float vec_r, vec_g, vec_b, result;
79
80 /* CYA */
81 if (!length)
82 return;
83
84 /* one pixel is handled outside of the loop */
85 length--;
86
87 /* setup for transforming 1st pixel */
88 vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
89 vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
90 vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
91 src += 3;
92
93 /* transform all but final pixel */
94
95 for (i=0; i<length; i++)
96 {
97 /* position values from gamma tables */
98 vec_r = vec_splat(vec_r, 0);
99 vec_g = vec_splat(vec_g, 0);
100 vec_b = vec_splat(vec_b, 0);
101
102 /* gamma * matrix */
103 vec_r = vec_madd(vec_r, mat0, min);
104 vec_g = vec_madd(vec_g, mat1, min);
105 vec_b = vec_madd(vec_b, mat2, min);
106
107 /* crunch, crunch, crunch */
108 vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
109 vec_r = vec_max(min, vec_r);
110 vec_r = vec_min(max, vec_r);
111 result = vec_madd(vec_r, scale, min);
112
113 /* store calc'd output tables indices */
114 vec_st(vec_ctu(vec_round(result), 0), 0, (vector unsigned int*)output);
115
116 /* load for next loop while store completes */
117 vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
118 vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
119 vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
120 src += 3;
121
122 /* use calc'd indices to output RGB values */
123 dest[0] = otdata_r[output[0]];
124 dest[1] = otdata_g[output[1]];
125 dest[2] = otdata_b[output[2]];
126 dest += 3;
127 }
128
129 /* handle final (maybe only) pixel */
130
131 vec_r = vec_splat(vec_r, 0);
132 vec_g = vec_splat(vec_g, 0);
133 vec_b = vec_splat(vec_b, 0);
134
135 vec_r = vec_madd(vec_r, mat0, min);
136 vec_g = vec_madd(vec_g, mat1, min);
137 vec_b = vec_madd(vec_b, mat2, min);
138
139 vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
140 vec_r = vec_max(min, vec_r);
141 vec_r = vec_min(max, vec_r);
142 result = vec_madd(vec_r, scale, min);
143
144 vec_st(vec_ctu(vec_round(result),0),0,(vector unsigned int*)output);
145
146 dest[0] = otdata_r[output[0]];
147 dest[1] = otdata_g[output[1]];
148 dest[2] = otdata_b[output[2]];
149 }
150
151 void qcms_transform_data_rgba_out_lut_altivec(qcms_transform *transform,
152 unsigned char *src,
153 unsigned char *dest,
154 size_t length)
155 {
156 unsigned int i;
157 float (*mat)[4] = transform->matrix;
158 char input_back[32];
159 /* Ensure we have a buffer that's 16 byte aligned regardless of the original
160 * stack alignment. We can't use __attribute__((aligned(16))) or __declspec(align(32))
161 * because they don't work on stack variables. gcc 4.4 does do the right thing
162 * on x86 but that's too new for us right now. For more info: gcc bug #16660 */
163 float const *input = (float*)(((uintptr_t)&input_back[16]) & ~0xf);
164 /* share input and output locations to save having to keep the
165 * locations in separate registers */
166 uint32_t const *output = (uint32_t*)input;
167
168 /* deref *transform now to avoid it in loop */
169 const float *igtbl_r = transform->input_gamma_table_r;
170 const float *igtbl_g = transform->input_gamma_table_g;
171 const float *igtbl_b = transform->input_gamma_table_b;
172
173 /* deref *transform now to avoid it in loop */
174 const uint8_t *otdata_r = &transform->output_table_r->data[0];
175 const uint8_t *otdata_g = &transform->output_table_g->data[0];
176 const uint8_t *otdata_b = &transform->output_table_b->data[0];
177
178 /* input matrix values never change */
179 const vector float mat0 = vec_ldl(0, (vector float*)mat[0]);
180 const vector float mat1 = vec_ldl(0, (vector float*)mat[1]);
181 const vector float mat2 = vec_ldl(0, (vector float*)mat[2]);
182
183 /* these values don't change, either */
184 const vector float max = vec_splat(vec_lde(0, (float*)&clampMaxValueX4), 0);
185 const vector float min = (vector float)vec_splat_u32(0);
186 const vector float scale = vec_splat(vec_lde(0, (float*)&floatScaleX4), 0);
187
188 /* working variables */
189 vector float vec_r, vec_g, vec_b, result;
190 unsigned char alpha;
191
192 /* CYA */
193 if (!length)
194 return;
195
196 /* one pixel is handled outside of the loop */
197 length--;
198
199 /* setup for transforming 1st pixel */
200 vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
201 vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
202 vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
203 alpha = src[3];
204 src += 4;
205
206 /* transform all but final pixel */
207
208 for (i=0; i<length; i++)
209 {
210 /* position values from gamma tables */
211 vec_r = vec_splat(vec_r, 0);
212 vec_g = vec_splat(vec_g, 0);
213 vec_b = vec_splat(vec_b, 0);
214
215 /* gamma * matrix */
216 vec_r = vec_madd(vec_r, mat0, min);
217 vec_g = vec_madd(vec_g, mat1, min);
218 vec_b = vec_madd(vec_b, mat2, min);
219
220 /* store alpha for this pixel; load alpha for next */
221 dest[3] = alpha;
222 alpha = src[3];
223
224 /* crunch, crunch, crunch */
225 vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
226 vec_r = vec_max(min, vec_r);
227 vec_r = vec_min(max, vec_r);
228 result = vec_madd(vec_r, scale, min);
229
230 /* store calc'd output tables indices */
231 vec_st(vec_ctu(vec_round(result), 0), 0, (vector unsigned int*)output);
232
233 /* load gamma values for next loop while store completes */
234 vec_r = load_aligned_float((float*)&igtbl_r[src[0]]);
235 vec_g = load_aligned_float((float*)&igtbl_r[src[1]]);
236 vec_b = load_aligned_float((float*)&igtbl_r[src[2]]);
237 src += 4;
238
239 /* use calc'd indices to output RGB values */
240 dest[0] = otdata_r[output[0]];
241 dest[1] = otdata_g[output[1]];
242 dest[2] = otdata_b[output[2]];
243 dest += 4;
244 }
245
246 /* handle final (maybe only) pixel */
247
248 vec_r = vec_splat(vec_r, 0);
249 vec_g = vec_splat(vec_g, 0);
250 vec_b = vec_splat(vec_b, 0);
251
252 vec_r = vec_madd(vec_r, mat0, min);
253 vec_g = vec_madd(vec_g, mat1, min);
254 vec_b = vec_madd(vec_b, mat2, min);
255
256 dest[3] = alpha;
257
258 vec_r = vec_add(vec_r, vec_add(vec_g, vec_b));
259 vec_r = vec_max(min, vec_r);
260 vec_r = vec_min(max, vec_r);
261 result = vec_madd(vec_r, scale, min);
262
263 vec_st(vec_ctu(vec_round(result), 0), 0, (vector unsigned int*)output);
264
265 dest[0] = otdata_r[output[0]];
266 dest[1] = otdata_g[output[1]];
267 dest[2] = otdata_b[output[2]];
268 }
269

Mercurial Repository: The Tor Browser

Europalab SCM Repository Server

mercurial