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comparison: gfx/qcms/transform-sse1.c

gfx/qcms/transform-sse1.c

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1 #include <xmmintrin.h>
2
3 #include "qcmsint.h"
4
5 /* pre-shuffled: just load these into XMM reg instead of load-scalar/shufps sequence */
6 #define FLOATSCALE (float)(PRECACHE_OUTPUT_SIZE)
7 #define CLAMPMAXVAL ( ((float) (PRECACHE_OUTPUT_SIZE - 1)) / PRECACHE_OUTPUT_SIZE )
8 static const ALIGN float floatScaleX4[4] =
9 { FLOATSCALE, FLOATSCALE, FLOATSCALE, FLOATSCALE};
10 static const ALIGN float clampMaxValueX4[4] =
11 { CLAMPMAXVAL, CLAMPMAXVAL, CLAMPMAXVAL, CLAMPMAXVAL};
12
13 void qcms_transform_data_rgb_out_lut_sse1(qcms_transform *transform,
14 unsigned char *src,
15 unsigned char *dest,
16 size_t length)
17 {
18 unsigned int i;
19 float (*mat)[4] = transform->matrix;
20 char input_back[32];
21 /* Ensure we have a buffer that's 16 byte aligned regardless of the original
22 * stack alignment. We can't use __attribute__((aligned(16))) or __declspec(align(32))
23 * because they don't work on stack variables. gcc 4.4 does do the right thing
24 * on x86 but that's too new for us right now. For more info: gcc bug #16660 */
25 float const * input = (float*)(((uintptr_t)&input_back[16]) & ~0xf);
26 /* share input and output locations to save having to keep the
27 * locations in separate registers */
28 uint32_t const * output = (uint32_t*)input;
29
30 /* deref *transform now to avoid it in loop */
31 const float *igtbl_r = transform->input_gamma_table_r;
32 const float *igtbl_g = transform->input_gamma_table_g;
33 const float *igtbl_b = transform->input_gamma_table_b;
34
35 /* deref *transform now to avoid it in loop */
36 const uint8_t *otdata_r = &transform->output_table_r->data[0];
37 const uint8_t *otdata_g = &transform->output_table_g->data[0];
38 const uint8_t *otdata_b = &transform->output_table_b->data[0];
39
40 /* input matrix values never change */
41 const __m128 mat0 = _mm_load_ps(mat[0]);
42 const __m128 mat1 = _mm_load_ps(mat[1]);
43 const __m128 mat2 = _mm_load_ps(mat[2]);
44
45 /* these values don't change, either */
46 const __m128 max = _mm_load_ps(clampMaxValueX4);
47 const __m128 min = _mm_setzero_ps();
48 const __m128 scale = _mm_load_ps(floatScaleX4);
49
50 /* working variables */
51 __m128 vec_r, vec_g, vec_b, result;
52
53 /* CYA */
54 if (!length)
55 return;
56
57 /* one pixel is handled outside of the loop */
58 length--;
59
60 /* setup for transforming 1st pixel */
61 vec_r = _mm_load_ss(&igtbl_r[src[0]]);
62 vec_g = _mm_load_ss(&igtbl_g[src[1]]);
63 vec_b = _mm_load_ss(&igtbl_b[src[2]]);
64 src += 3;
65
66 /* transform all but final pixel */
67
68 for (i=0; i<length; i++)
69 {
70 /* position values from gamma tables */
71 vec_r = _mm_shuffle_ps(vec_r, vec_r, 0);
72 vec_g = _mm_shuffle_ps(vec_g, vec_g, 0);
73 vec_b = _mm_shuffle_ps(vec_b, vec_b, 0);
74
75 /* gamma * matrix */
76 vec_r = _mm_mul_ps(vec_r, mat0);
77 vec_g = _mm_mul_ps(vec_g, mat1);
78 vec_b = _mm_mul_ps(vec_b, mat2);
79
80 /* crunch, crunch, crunch */
81 vec_r = _mm_add_ps(vec_r, _mm_add_ps(vec_g, vec_b));
82 vec_r = _mm_max_ps(min, vec_r);
83 vec_r = _mm_min_ps(max, vec_r);
84 result = _mm_mul_ps(vec_r, scale);
85
86 /* store calc'd output tables indices */
87 *((__m64 *)&output[0]) = _mm_cvtps_pi32(result);
88 result = _mm_movehl_ps(result, result);
89 *((__m64 *)&output[2]) = _mm_cvtps_pi32(result) ;
90
91 /* load for next loop while store completes */
92 vec_r = _mm_load_ss(&igtbl_r[src[0]]);
93 vec_g = _mm_load_ss(&igtbl_g[src[1]]);
94 vec_b = _mm_load_ss(&igtbl_b[src[2]]);
95 src += 3;
96
97 /* use calc'd indices to output RGB values */
98 dest[OUTPUT_R_INDEX] = otdata_r[output[0]];
99 dest[OUTPUT_G_INDEX] = otdata_g[output[1]];
100 dest[OUTPUT_B_INDEX] = otdata_b[output[2]];
101 dest += RGB_OUTPUT_COMPONENTS;
102 }
103
104 /* handle final (maybe only) pixel */
105
106 vec_r = _mm_shuffle_ps(vec_r, vec_r, 0);
107 vec_g = _mm_shuffle_ps(vec_g, vec_g, 0);
108 vec_b = _mm_shuffle_ps(vec_b, vec_b, 0);
109
110 vec_r = _mm_mul_ps(vec_r, mat0);
111 vec_g = _mm_mul_ps(vec_g, mat1);
112 vec_b = _mm_mul_ps(vec_b, mat2);
113
114 vec_r = _mm_add_ps(vec_r, _mm_add_ps(vec_g, vec_b));
115 vec_r = _mm_max_ps(min, vec_r);
116 vec_r = _mm_min_ps(max, vec_r);
117 result = _mm_mul_ps(vec_r, scale);
118
119 *((__m64 *)&output[0]) = _mm_cvtps_pi32(result);
120 result = _mm_movehl_ps(result, result);
121 *((__m64 *)&output[2]) = _mm_cvtps_pi32(result);
122
123 dest[OUTPUT_R_INDEX] = otdata_r[output[0]];
124 dest[OUTPUT_G_INDEX] = otdata_g[output[1]];
125 dest[OUTPUT_B_INDEX] = otdata_b[output[2]];
126
127 _mm_empty();
128 }
129
130 void qcms_transform_data_rgba_out_lut_sse1(qcms_transform *transform,
131 unsigned char *src,
132 unsigned char *dest,
133 size_t length)
134 {
135 unsigned int i;
136 float (*mat)[4] = transform->matrix;
137 char input_back[32];
138 /* Ensure we have a buffer that's 16 byte aligned regardless of the original
139 * stack alignment. We can't use __attribute__((aligned(16))) or __declspec(align(32))
140 * because they don't work on stack variables. gcc 4.4 does do the right thing
141 * on x86 but that's too new for us right now. For more info: gcc bug #16660 */
142 float const * input = (float*)(((uintptr_t)&input_back[16]) & ~0xf);
143 /* share input and output locations to save having to keep the
144 * locations in separate registers */
145 uint32_t const * output = (uint32_t*)input;
146
147 /* deref *transform now to avoid it in loop */
148 const float *igtbl_r = transform->input_gamma_table_r;
149 const float *igtbl_g = transform->input_gamma_table_g;
150 const float *igtbl_b = transform->input_gamma_table_b;
151
152 /* deref *transform now to avoid it in loop */
153 const uint8_t *otdata_r = &transform->output_table_r->data[0];
154 const uint8_t *otdata_g = &transform->output_table_g->data[0];
155 const uint8_t *otdata_b = &transform->output_table_b->data[0];
156
157 /* input matrix values never change */
158 const __m128 mat0 = _mm_load_ps(mat[0]);
159 const __m128 mat1 = _mm_load_ps(mat[1]);
160 const __m128 mat2 = _mm_load_ps(mat[2]);
161
162 /* these values don't change, either */
163 const __m128 max = _mm_load_ps(clampMaxValueX4);
164 const __m128 min = _mm_setzero_ps();
165 const __m128 scale = _mm_load_ps(floatScaleX4);
166
167 /* working variables */
168 __m128 vec_r, vec_g, vec_b, result;
169 unsigned char alpha;
170
171 /* CYA */
172 if (!length)
173 return;
174
175 /* one pixel is handled outside of the loop */
176 length--;
177
178 /* setup for transforming 1st pixel */
179 vec_r = _mm_load_ss(&igtbl_r[src[0]]);
180 vec_g = _mm_load_ss(&igtbl_g[src[1]]);
181 vec_b = _mm_load_ss(&igtbl_b[src[2]]);
182 alpha = src[3];
183 src += 4;
184
185 /* transform all but final pixel */
186
187 for (i=0; i<length; i++)
188 {
189 /* position values from gamma tables */
190 vec_r = _mm_shuffle_ps(vec_r, vec_r, 0);
191 vec_g = _mm_shuffle_ps(vec_g, vec_g, 0);
192 vec_b = _mm_shuffle_ps(vec_b, vec_b, 0);
193
194 /* gamma * matrix */
195 vec_r = _mm_mul_ps(vec_r, mat0);
196 vec_g = _mm_mul_ps(vec_g, mat1);
197 vec_b = _mm_mul_ps(vec_b, mat2);
198
199 /* store alpha for this pixel; load alpha for next */
200 dest[OUTPUT_A_INDEX] = alpha;
201 alpha = src[3];
202
203 /* crunch, crunch, crunch */
204 vec_r = _mm_add_ps(vec_r, _mm_add_ps(vec_g, vec_b));
205 vec_r = _mm_max_ps(min, vec_r);
206 vec_r = _mm_min_ps(max, vec_r);
207 result = _mm_mul_ps(vec_r, scale);
208
209 /* store calc'd output tables indices */
210 *((__m64 *)&output[0]) = _mm_cvtps_pi32(result);
211 result = _mm_movehl_ps(result, result);
212 *((__m64 *)&output[2]) = _mm_cvtps_pi32(result);
213
214 /* load gamma values for next loop while store completes */
215 vec_r = _mm_load_ss(&igtbl_r[src[0]]);
216 vec_g = _mm_load_ss(&igtbl_g[src[1]]);
217 vec_b = _mm_load_ss(&igtbl_b[src[2]]);
218 src += 4;
219
220 /* use calc'd indices to output RGB values */
221 dest[OUTPUT_R_INDEX] = otdata_r[output[0]];
222 dest[OUTPUT_G_INDEX] = otdata_g[output[1]];
223 dest[OUTPUT_B_INDEX] = otdata_b[output[2]];
224 dest += 4;
225 }
226
227 /* handle final (maybe only) pixel */
228
229 vec_r = _mm_shuffle_ps(vec_r, vec_r, 0);
230 vec_g = _mm_shuffle_ps(vec_g, vec_g, 0);
231 vec_b = _mm_shuffle_ps(vec_b, vec_b, 0);
232
233 vec_r = _mm_mul_ps(vec_r, mat0);
234 vec_g = _mm_mul_ps(vec_g, mat1);
235 vec_b = _mm_mul_ps(vec_b, mat2);
236
237 dest[OUTPUT_A_INDEX] = alpha;
238
239 vec_r = _mm_add_ps(vec_r, _mm_add_ps(vec_g, vec_b));
240 vec_r = _mm_max_ps(min, vec_r);
241 vec_r = _mm_min_ps(max, vec_r);
242 result = _mm_mul_ps(vec_r, scale);
243
244 *((__m64 *)&output[0]) = _mm_cvtps_pi32(result);
245 result = _mm_movehl_ps(result, result);
246 *((__m64 *)&output[2]) = _mm_cvtps_pi32(result);
247
248 dest[OUTPUT_R_INDEX] = otdata_r[output[0]];
249 dest[OUTPUT_G_INDEX] = otdata_g[output[1]];
250 dest[OUTPUT_B_INDEX] = otdata_b[output[2]];
251
252 _mm_empty();
253 }

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