1 /*
2  *  Copyright (c) 2013 The WebM project authors. All Rights Reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #include <assert.h>
12 #include <stdio.h>
13 
14 #include "./vpx_config.h"
15 #include "./vp9_rtcd.h"
16 #include "vp9/common/vp9_common.h"
17 #include "vp9/common/vp9_blockd.h"
18 #include "vp9/common/vp9_idct.h"
19 #include "vp9/common/mips/dspr2/vp9_common_dspr2.h"
20 
21 #if HAVE_DSPR2
idct32_rows_dspr2(const int16_t * input,int16_t * output,uint32_t no_rows)22 static void idct32_rows_dspr2(const int16_t *input, int16_t *output,
23                               uint32_t no_rows) {
24   int16_t step1_0, step1_1, step1_2, step1_3, step1_4, step1_5, step1_6;
25   int16_t step1_7, step1_8, step1_9, step1_10, step1_11, step1_12, step1_13;
26   int16_t step1_14, step1_15, step1_16, step1_17, step1_18, step1_19, step1_20;
27   int16_t step1_21, step1_22, step1_23, step1_24, step1_25, step1_26, step1_27;
28   int16_t step1_28, step1_29, step1_30, step1_31;
29   int16_t step2_0, step2_1, step2_2, step2_3, step2_4, step2_5, step2_6;
30   int16_t step2_7, step2_8, step2_9, step2_10, step2_11, step2_12, step2_13;
31   int16_t step2_14, step2_15, step2_16, step2_17, step2_18, step2_19, step2_20;
32   int16_t step2_21, step2_22, step2_23, step2_24, step2_25, step2_26, step2_27;
33   int16_t step2_28, step2_29, step2_30, step2_31;
34   int16_t step3_8, step3_9, step3_10, step3_11, step3_12, step3_13, step3_14;
35   int16_t step3_15, step3_16, step3_17, step3_18, step3_19, step3_20, step3_21;
36   int16_t step3_22, step3_23, step3_24, step3_25, step3_26, step3_27, step3_28;
37   int16_t step3_29, step3_30, step3_31;
38   int temp0, temp1, temp2, temp3;
39   int load1, load2, load3, load4;
40   int result1, result2;
41   int temp21;
42   int i;
43   const int const_2_power_13 = 8192;
44   const int32_t *input_int;
45 
46   for (i = no_rows; i--; ) {
47     input_int = (const int32_t *)input;
48 
49     if (!(input_int[0]  | input_int[1]  | input_int[2]  | input_int[3]  |
50           input_int[4]  | input_int[5]  | input_int[6]  | input_int[7]  |
51           input_int[8]  | input_int[9]  | input_int[10] | input_int[11] |
52           input_int[12] | input_int[13] | input_int[14] | input_int[15])) {
53       input += 32;
54 
55       __asm__ __volatile__ (
56           "sh     $zero,     0(%[output])     \n\t"
57           "sh     $zero,    64(%[output])     \n\t"
58           "sh     $zero,   128(%[output])     \n\t"
59           "sh     $zero,   192(%[output])     \n\t"
60           "sh     $zero,   256(%[output])     \n\t"
61           "sh     $zero,   320(%[output])     \n\t"
62           "sh     $zero,   384(%[output])     \n\t"
63           "sh     $zero,   448(%[output])     \n\t"
64           "sh     $zero,   512(%[output])     \n\t"
65           "sh     $zero,   576(%[output])     \n\t"
66           "sh     $zero,   640(%[output])     \n\t"
67           "sh     $zero,   704(%[output])     \n\t"
68           "sh     $zero,   768(%[output])     \n\t"
69           "sh     $zero,   832(%[output])     \n\t"
70           "sh     $zero,   896(%[output])     \n\t"
71           "sh     $zero,   960(%[output])     \n\t"
72           "sh     $zero,  1024(%[output])     \n\t"
73           "sh     $zero,  1088(%[output])     \n\t"
74           "sh     $zero,  1152(%[output])     \n\t"
75           "sh     $zero,  1216(%[output])     \n\t"
76           "sh     $zero,  1280(%[output])     \n\t"
77           "sh     $zero,  1344(%[output])     \n\t"
78           "sh     $zero,  1408(%[output])     \n\t"
79           "sh     $zero,  1472(%[output])     \n\t"
80           "sh     $zero,  1536(%[output])     \n\t"
81           "sh     $zero,  1600(%[output])     \n\t"
82           "sh     $zero,  1664(%[output])     \n\t"
83           "sh     $zero,  1728(%[output])     \n\t"
84           "sh     $zero,  1792(%[output])     \n\t"
85           "sh     $zero,  1856(%[output])     \n\t"
86           "sh     $zero,  1920(%[output])     \n\t"
87           "sh     $zero,  1984(%[output])     \n\t"
88 
89           :
90           : [output] "r" (output)
91       );
92 
93       output += 1;
94 
95       continue;
96     }
97 
98     /* prefetch row */
99     vp9_prefetch_load((const uint8_t *)(input + 32));
100     vp9_prefetch_load((const uint8_t *)(input + 48));
101 
102     __asm__ __volatile__ (
103         "lh       %[load1],             2(%[input])                     \n\t"
104         "lh       %[load2],             62(%[input])                    \n\t"
105         "lh       %[load3],             34(%[input])                    \n\t"
106         "lh       %[load4],             30(%[input])                    \n\t"
107 
108         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
109         "mthi     $zero,                $ac1                            \n\t"
110         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
111         "mthi     $zero,                $ac3                            \n\t"
112 
113         "madd     $ac1,                 %[load1],       %[cospi_31_64]  \n\t"
114         "msub     $ac1,                 %[load2],       %[cospi_1_64]   \n\t"
115         "extp     %[temp0],             $ac1,           31              \n\t"
116 
117         "madd     $ac3,                 %[load1],       %[cospi_1_64]   \n\t"
118         "madd     $ac3,                 %[load2],       %[cospi_31_64]  \n\t"
119         "extp     %[temp3],             $ac3,           31              \n\t"
120 
121         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
122         "mthi     $zero,                $ac1                            \n\t"
123         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
124         "mthi     $zero,                $ac2                            \n\t"
125 
126         "madd     $ac2,                 %[load3],       %[cospi_15_64]  \n\t"
127         "msub     $ac2,                 %[load4],       %[cospi_17_64]  \n\t"
128         "extp     %[temp1],             $ac2,           31              \n\t"
129 
130         "madd     $ac1,                 %[load3],       %[cospi_17_64]  \n\t"
131         "madd     $ac1,                 %[load4],       %[cospi_15_64]  \n\t"
132         "extp     %[temp2],             $ac1,           31              \n\t"
133 
134         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
135         "mthi     $zero,                $ac1                            \n\t"
136         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
137         "mthi     $zero,                $ac3                            \n\t"
138 
139         "sub      %[load1],             %[temp3],       %[temp2]        \n\t"
140         "sub      %[load2],             %[temp0],       %[temp1]        \n\t"
141 
142         "madd     $ac1,                 %[load1],       %[cospi_28_64]  \n\t"
143         "msub     $ac1,                 %[load2],       %[cospi_4_64]   \n\t"
144         "madd     $ac3,                 %[load1],       %[cospi_4_64]   \n\t"
145         "madd     $ac3,                 %[load2],       %[cospi_28_64]  \n\t"
146 
147         "extp     %[step1_17],          $ac1,           31              \n\t"
148         "extp     %[step1_30],          $ac3,           31              \n\t"
149         "add      %[step1_16],          %[temp0],       %[temp1]        \n\t"
150         "add      %[step1_31],          %[temp2],       %[temp3]        \n\t"
151 
152         : [load1] "=&r" (load1), [load2] "=&r" (load2),
153           [load3] "=&r" (load3), [load4] "=&r" (load4),
154           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
155           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
156           [step1_16] "=r" (step1_16), [step1_17] "=r" (step1_17),
157           [step1_30] "=r" (step1_30), [step1_31] "=r" (step1_31)
158         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
159           [cospi_31_64] "r" (cospi_31_64), [cospi_1_64] "r" (cospi_1_64),
160           [cospi_4_64] "r" (cospi_4_64), [cospi_17_64] "r" (cospi_17_64),
161           [cospi_15_64] "r" (cospi_15_64), [cospi_28_64] "r" (cospi_28_64)
162     );
163 
164     __asm__ __volatile__ (
165         "lh       %[load1],             18(%[input])                    \n\t"
166         "lh       %[load2],             46(%[input])                    \n\t"
167         "lh       %[load3],             50(%[input])                    \n\t"
168         "lh       %[load4],             14(%[input])                    \n\t"
169 
170         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
171         "mthi     $zero,                $ac1                            \n\t"
172         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
173         "mthi     $zero,                $ac3                            \n\t"
174 
175         "madd     $ac1,                 %[load1],       %[cospi_23_64]  \n\t"
176         "msub     $ac1,                 %[load2],       %[cospi_9_64]   \n\t"
177         "extp     %[temp0],             $ac1,           31              \n\t"
178 
179         "madd     $ac3,                 %[load1],       %[cospi_9_64]   \n\t"
180         "madd     $ac3,                 %[load2],       %[cospi_23_64]  \n\t"
181         "extp     %[temp3],             $ac3,           31              \n\t"
182 
183         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
184         "mthi     $zero,                $ac1                            \n\t"
185         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
186         "mthi     $zero,                $ac2                            \n\t"
187 
188         "madd     $ac2,                 %[load3],       %[cospi_7_64]   \n\t"
189         "msub     $ac2,                 %[load4],       %[cospi_25_64]  \n\t"
190         "extp     %[temp1],             $ac2,           31              \n\t"
191 
192         "madd     $ac1,                 %[load3],       %[cospi_25_64]  \n\t"
193         "madd     $ac1,                 %[load4],       %[cospi_7_64]   \n\t"
194         "extp     %[temp2],             $ac1,           31              \n\t"
195 
196         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
197         "mthi     $zero,                $ac1                            \n\t"
198         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
199         "mthi     $zero,                $ac3                            \n\t"
200 
201         "sub      %[load1],             %[temp1],       %[temp0]        \n\t"
202         "sub      %[load2],             %[temp2],       %[temp3]        \n\t"
203 
204         "msub     $ac1,                 %[load1],       %[cospi_28_64]  \n\t"
205         "msub     $ac1,                 %[load2],       %[cospi_4_64]   \n\t"
206         "msub     $ac3,                 %[load1],       %[cospi_4_64]   \n\t"
207         "madd     $ac3,                 %[load2],       %[cospi_28_64]  \n\t"
208 
209         "extp     %[step1_18],          $ac1,           31              \n\t"
210         "extp     %[step1_29],          $ac3,           31              \n\t"
211         "add      %[step1_19],          %[temp0],       %[temp1]        \n\t"
212         "add      %[step1_28],          %[temp2],       %[temp3]        \n\t"
213 
214         : [load1] "=&r" (load1), [load2] "=&r" (load2),
215           [load3] "=&r" (load3), [load4] "=&r" (load4),
216           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
217           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
218           [step1_18] "=r" (step1_18), [step1_19] "=r" (step1_19),
219           [step1_28] "=r" (step1_28), [step1_29] "=r" (step1_29)
220         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
221           [cospi_23_64] "r" (cospi_23_64), [cospi_9_64] "r" (cospi_9_64),
222           [cospi_4_64] "r" (cospi_4_64), [cospi_7_64] "r" (cospi_7_64),
223           [cospi_25_64] "r" (cospi_25_64), [cospi_28_64] "r" (cospi_28_64)
224     );
225 
226     __asm__ __volatile__ (
227         "lh       %[load1],             10(%[input])                    \n\t"
228         "lh       %[load2],             54(%[input])                    \n\t"
229         "lh       %[load3],             42(%[input])                    \n\t"
230         "lh       %[load4],             22(%[input])                    \n\t"
231 
232         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
233         "mthi     $zero,                $ac1                            \n\t"
234         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
235         "mthi     $zero,                $ac3                            \n\t"
236 
237         "madd     $ac1,                 %[load1],       %[cospi_27_64]  \n\t"
238         "msub     $ac1,                 %[load2],       %[cospi_5_64]   \n\t"
239         "extp     %[temp0],             $ac1,           31              \n\t"
240 
241         "madd     $ac3,                 %[load1],       %[cospi_5_64]   \n\t"
242         "madd     $ac3,                 %[load2],       %[cospi_27_64]  \n\t"
243         "extp     %[temp3],             $ac3,           31              \n\t"
244 
245         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
246         "mthi     $zero,                $ac1                            \n\t"
247         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
248         "mthi     $zero,                $ac2                            \n\t"
249 
250         "madd     $ac2,                 %[load3],       %[cospi_11_64]  \n\t"
251         "msub     $ac2,                 %[load4],       %[cospi_21_64]  \n\t"
252         "extp     %[temp1],             $ac2,           31              \n\t"
253 
254         "madd     $ac1,                 %[load3],       %[cospi_21_64]  \n\t"
255         "madd     $ac1,                 %[load4],       %[cospi_11_64]  \n\t"
256         "extp     %[temp2],             $ac1,           31              \n\t"
257 
258         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
259         "mthi     $zero,                $ac1                            \n\t"
260         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
261         "mthi     $zero,                $ac3                            \n\t"
262 
263         "sub      %[load1],             %[temp0],       %[temp1]        \n\t"
264         "sub      %[load2],             %[temp3],       %[temp2]        \n\t"
265 
266         "madd     $ac1,                 %[load2],       %[cospi_12_64]  \n\t"
267         "msub     $ac1,                 %[load1],       %[cospi_20_64]  \n\t"
268         "madd     $ac3,                 %[load1],       %[cospi_12_64]  \n\t"
269         "madd     $ac3,                 %[load2],       %[cospi_20_64]  \n\t"
270 
271         "extp     %[step1_21],          $ac1,           31              \n\t"
272         "extp     %[step1_26],          $ac3,           31              \n\t"
273         "add      %[step1_20],          %[temp0],       %[temp1]        \n\t"
274         "add      %[step1_27],          %[temp2],       %[temp3]        \n\t"
275 
276         : [load1] "=&r" (load1), [load2] "=&r" (load2),
277           [load3] "=&r" (load3), [load4] "=&r" (load4),
278           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
279           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
280           [step1_20] "=r" (step1_20), [step1_21] "=r" (step1_21),
281           [step1_26] "=r" (step1_26), [step1_27] "=r" (step1_27)
282         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
283           [cospi_27_64] "r" (cospi_27_64), [cospi_5_64] "r" (cospi_5_64),
284           [cospi_11_64] "r" (cospi_11_64), [cospi_21_64] "r" (cospi_21_64),
285           [cospi_12_64] "r" (cospi_12_64), [cospi_20_64] "r" (cospi_20_64)
286     );
287 
288     __asm__ __volatile__ (
289         "lh       %[load1],             26(%[input])                    \n\t"
290         "lh       %[load2],             38(%[input])                    \n\t"
291         "lh       %[load3],             58(%[input])                    \n\t"
292         "lh       %[load4],              6(%[input])                    \n\t"
293 
294         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
295         "mthi     $zero,                $ac1                            \n\t"
296         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
297         "mthi     $zero,                $ac3                            \n\t"
298 
299         "madd     $ac1,                 %[load1],       %[cospi_19_64]  \n\t"
300         "msub     $ac1,                 %[load2],       %[cospi_13_64]  \n\t"
301         "extp     %[temp0],             $ac1,           31              \n\t"
302 
303         "madd     $ac3,                 %[load1],       %[cospi_13_64]  \n\t"
304         "madd     $ac3,                 %[load2],       %[cospi_19_64]  \n\t"
305         "extp     %[temp3],             $ac3,           31              \n\t"
306 
307         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
308         "mthi     $zero,                $ac1                            \n\t"
309         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
310         "mthi     $zero,                $ac2                            \n\t"
311 
312         "madd     $ac2,                 %[load3],       %[cospi_3_64]   \n\t"
313         "msub     $ac2,                 %[load4],       %[cospi_29_64]  \n\t"
314         "extp     %[temp1],             $ac2,           31              \n\t"
315 
316         "madd     $ac1,                 %[load3],       %[cospi_29_64]  \n\t"
317         "madd     $ac1,                 %[load4],       %[cospi_3_64]   \n\t"
318         "extp     %[temp2],             $ac1,           31              \n\t"
319 
320         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
321         "mthi     $zero,                $ac1                            \n\t"
322         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
323         "mthi     $zero,                $ac3                            \n\t"
324 
325         "sub      %[load1],             %[temp1],       %[temp0]        \n\t"
326         "sub      %[load2],             %[temp2],       %[temp3]        \n\t"
327 
328         "msub     $ac1,                 %[load1],       %[cospi_12_64]  \n\t"
329         "msub     $ac1,                 %[load2],       %[cospi_20_64]  \n\t"
330         "msub     $ac3,                 %[load1],       %[cospi_20_64]  \n\t"
331         "madd     $ac3,                 %[load2],       %[cospi_12_64]  \n\t"
332 
333         "extp     %[step1_22],          $ac1,           31              \n\t"
334         "extp     %[step1_25],          $ac3,           31              \n\t"
335         "add      %[step1_23],          %[temp0],       %[temp1]        \n\t"
336         "add      %[step1_24],          %[temp2],       %[temp3]        \n\t"
337 
338         : [load1] "=&r" (load1), [load2] "=&r" (load2),
339           [load3] "=&r" (load3), [load4] "=&r" (load4),
340           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
341           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
342           [step1_22] "=r" (step1_22), [step1_23] "=r" (step1_23),
343           [step1_24] "=r" (step1_24), [step1_25] "=r" (step1_25)
344         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
345           [cospi_19_64] "r" (cospi_19_64), [cospi_13_64] "r" (cospi_13_64),
346           [cospi_3_64] "r" (cospi_3_64), [cospi_29_64] "r" (cospi_29_64),
347           [cospi_12_64] "r" (cospi_12_64), [cospi_20_64] "r" (cospi_20_64)
348     );
349 
350     __asm__ __volatile__ (
351         "lh       %[load1],              4(%[input])                    \n\t"
352         "lh       %[load2],             60(%[input])                    \n\t"
353         "lh       %[load3],             36(%[input])                    \n\t"
354         "lh       %[load4],             28(%[input])                    \n\t"
355 
356         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
357         "mthi     $zero,                $ac1                            \n\t"
358         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
359         "mthi     $zero,                $ac3                            \n\t"
360 
361         "madd     $ac1,                 %[load1],       %[cospi_30_64]  \n\t"
362         "msub     $ac1,                 %[load2],       %[cospi_2_64]   \n\t"
363         "extp     %[temp0],             $ac1,           31              \n\t"
364 
365         "madd     $ac3,                 %[load1],       %[cospi_2_64]   \n\t"
366         "madd     $ac3,                 %[load2],       %[cospi_30_64]  \n\t"
367         "extp     %[temp3],             $ac3,           31              \n\t"
368 
369         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
370         "mthi     $zero,                $ac1                            \n\t"
371         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
372         "mthi     $zero,                $ac2                            \n\t"
373 
374         "madd     $ac2,                 %[load3],       %[cospi_14_64]  \n\t"
375         "msub     $ac2,                 %[load4],       %[cospi_18_64]  \n\t"
376         "extp     %[temp1],             $ac2,           31              \n\t"
377 
378         "madd     $ac1,                 %[load3],       %[cospi_18_64]  \n\t"
379         "madd     $ac1,                 %[load4],       %[cospi_14_64]  \n\t"
380         "extp     %[temp2],             $ac1,           31              \n\t"
381 
382         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
383         "mthi     $zero,                $ac1                            \n\t"
384         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
385         "mthi     $zero,                $ac3                            \n\t"
386 
387         "sub      %[load1],             %[temp0],       %[temp1]        \n\t"
388         "sub      %[load2],             %[temp3],       %[temp2]        \n\t"
389 
390         "msub     $ac1,                 %[load1],       %[cospi_8_64]   \n\t"
391         "madd     $ac1,                 %[load2],       %[cospi_24_64]  \n\t"
392         "madd     $ac3,                 %[load1],       %[cospi_24_64]  \n\t"
393         "madd     $ac3,                 %[load2],       %[cospi_8_64]   \n\t"
394 
395         "extp     %[step2_9],           $ac1,           31              \n\t"
396         "extp     %[step2_14],          $ac3,           31              \n\t"
397         "add      %[step2_8],           %[temp0],       %[temp1]        \n\t"
398         "add      %[step2_15],          %[temp2],       %[temp3]        \n\t"
399 
400         : [load1] "=&r" (load1), [load2] "=&r" (load2),
401           [load3] "=&r" (load3), [load4] "=&r" (load4),
402           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
403           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
404           [step2_8] "=r" (step2_8), [step2_9] "=r" (step2_9),
405           [step2_14] "=r" (step2_14), [step2_15] "=r" (step2_15)
406         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
407           [cospi_30_64] "r" (cospi_30_64), [cospi_2_64] "r" (cospi_2_64),
408           [cospi_14_64] "r" (cospi_14_64), [cospi_18_64] "r" (cospi_18_64),
409           [cospi_8_64] "r" (cospi_8_64), [cospi_24_64] "r" (cospi_24_64)
410     );
411 
412     __asm__ __volatile__ (
413         "lh       %[load1],             20(%[input])                    \n\t"
414         "lh       %[load2],             44(%[input])                    \n\t"
415         "lh       %[load3],             52(%[input])                    \n\t"
416         "lh       %[load4],             12(%[input])                    \n\t"
417 
418         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
419         "mthi     $zero,                $ac1                            \n\t"
420         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
421         "mthi     $zero,                $ac3                            \n\t"
422 
423         "madd     $ac1,                 %[load1],       %[cospi_22_64]  \n\t"
424         "msub     $ac1,                 %[load2],       %[cospi_10_64]  \n\t"
425         "extp     %[temp0],             $ac1,           31              \n\t"
426 
427         "madd     $ac3,                 %[load1],       %[cospi_10_64]  \n\t"
428         "madd     $ac3,                 %[load2],       %[cospi_22_64]  \n\t"
429         "extp     %[temp3],             $ac3,           31              \n\t"
430 
431         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
432         "mthi     $zero,                $ac1                            \n\t"
433         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
434         "mthi     $zero,                $ac2                            \n\t"
435 
436         "madd     $ac2,                 %[load3],       %[cospi_6_64]   \n\t"
437         "msub     $ac2,                 %[load4],       %[cospi_26_64]  \n\t"
438         "extp     %[temp1],             $ac2,           31              \n\t"
439 
440         "madd     $ac1,                 %[load3],       %[cospi_26_64]  \n\t"
441         "madd     $ac1,                 %[load4],       %[cospi_6_64]   \n\t"
442         "extp     %[temp2],             $ac1,           31              \n\t"
443 
444         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
445         "mthi     $zero,                $ac1                            \n\t"
446         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
447         "mthi     $zero,                $ac3                            \n\t"
448 
449         "sub      %[load1],             %[temp1],       %[temp0]        \n\t"
450         "sub      %[load2],             %[temp2],       %[temp3]        \n\t"
451 
452         "msub     $ac1,                 %[load1],       %[cospi_24_64]  \n\t"
453         "msub     $ac1,                 %[load2],       %[cospi_8_64]   \n\t"
454         "madd     $ac3,                 %[load2],       %[cospi_24_64]  \n\t"
455         "msub     $ac3,                 %[load1],       %[cospi_8_64]   \n\t"
456 
457         "extp     %[step2_10],          $ac1,           31              \n\t"
458         "extp     %[step2_13],          $ac3,           31              \n\t"
459         "add      %[step2_11],          %[temp0],       %[temp1]        \n\t"
460         "add      %[step2_12],          %[temp2],       %[temp3]        \n\t"
461 
462         : [load1] "=&r" (load1), [load2] "=&r" (load2),
463           [load3] "=&r" (load3), [load4] "=&r" (load4),
464           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
465           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
466           [step2_10] "=r" (step2_10), [step2_11] "=r" (step2_11),
467           [step2_12] "=r" (step2_12), [step2_13] "=r" (step2_13)
468         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
469           [cospi_22_64] "r" (cospi_22_64), [cospi_10_64] "r" (cospi_10_64),
470           [cospi_6_64] "r" (cospi_6_64), [cospi_26_64] "r" (cospi_26_64),
471           [cospi_8_64] "r" (cospi_8_64), [cospi_24_64] "r" (cospi_24_64)
472     );
473 
474     __asm__ __volatile__ (
475         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
476         "mthi     $zero,                $ac0                            \n\t"
477         "sub      %[temp0],             %[step2_14],    %[step2_13]     \n\t"
478         "sub      %[temp0],             %[temp0],       %[step2_9]      \n\t"
479         "add      %[temp0],             %[temp0],       %[step2_10]     \n\t"
480         "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
481 
482         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
483         "mthi     $zero,                $ac1                            \n\t"
484         "sub      %[temp1],             %[step2_14],    %[step2_13]     \n\t"
485         "add      %[temp1],             %[temp1],       %[step2_9]      \n\t"
486         "sub      %[temp1],             %[temp1],       %[step2_10]     \n\t"
487         "madd     $ac1,                 %[temp1],       %[cospi_16_64]  \n\t"
488 
489         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
490         "mthi     $zero,                $ac2                            \n\t"
491         "sub      %[temp0],             %[step2_15],    %[step2_12]     \n\t"
492         "sub      %[temp0],             %[temp0],       %[step2_8]      \n\t"
493         "add      %[temp0],             %[temp0],       %[step2_11]     \n\t"
494         "madd     $ac2,                 %[temp0],       %[cospi_16_64]  \n\t"
495 
496         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
497         "mthi     $zero,                $ac3                            \n\t"
498         "sub      %[temp1],             %[step2_15],    %[step2_12]     \n\t"
499         "add      %[temp1],             %[temp1],       %[step2_8]      \n\t"
500         "sub      %[temp1],             %[temp1],       %[step2_11]     \n\t"
501         "madd     $ac3,                 %[temp1],       %[cospi_16_64]  \n\t"
502 
503         "add      %[step3_8],           %[step2_8],     %[step2_11]     \n\t"
504         "add      %[step3_9],           %[step2_9],     %[step2_10]     \n\t"
505         "add      %[step3_14],          %[step2_13],    %[step2_14]     \n\t"
506         "add      %[step3_15],          %[step2_12],    %[step2_15]     \n\t"
507 
508         "extp     %[step3_10],          $ac0,           31              \n\t"
509         "extp     %[step3_13],          $ac1,           31              \n\t"
510         "extp     %[step3_11],          $ac2,           31              \n\t"
511         "extp     %[step3_12],          $ac3,           31              \n\t"
512 
513         : [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
514           [step3_8] "=r" (step3_8), [step3_9] "=r" (step3_9),
515           [step3_10] "=r" (step3_10), [step3_11] "=r" (step3_11),
516           [step3_12] "=r" (step3_12), [step3_13] "=r" (step3_13),
517           [step3_14] "=r" (step3_14), [step3_15] "=r" (step3_15)
518         : [const_2_power_13] "r" (const_2_power_13),
519           [step2_8] "r" (step2_8), [step2_9] "r" (step2_9),
520           [step2_10] "r" (step2_10), [step2_11] "r" (step2_11),
521           [step2_12] "r" (step2_12), [step2_13] "r" (step2_13),
522           [step2_14] "r" (step2_14), [step2_15] "r" (step2_15),
523           [cospi_16_64] "r" (cospi_16_64)
524     );
525 
526     step2_18 = step1_17 - step1_18;
527     step2_29 = step1_30 - step1_29;
528 
529     __asm__ __volatile__ (
530         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
531         "mthi     $zero,                $ac0                            \n\t"
532         "msub     $ac0,                 %[step2_18],    %[cospi_8_64]   \n\t"
533         "madd     $ac0,                 %[step2_29],    %[cospi_24_64]  \n\t"
534         "extp     %[step3_18],          $ac0,           31              \n\t"
535 
536         : [step3_18] "=r" (step3_18)
537         : [const_2_power_13] "r" (const_2_power_13),
538           [step2_18] "r" (step2_18), [step2_29] "r" (step2_29),
539           [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
540     );
541 
542     temp21 = step2_18 * cospi_24_64 + step2_29 * cospi_8_64;
543     step3_29 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
544 
545     step2_19 = step1_16 - step1_19;
546     step2_28 = step1_31 - step1_28;
547 
548     __asm__ __volatile__ (
549         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
550         "mthi     $zero,                $ac0                            \n\t"
551         "msub     $ac0,                 %[step2_19],    %[cospi_8_64]   \n\t"
552         "madd     $ac0,                 %[step2_28],    %[cospi_24_64]  \n\t"
553         "extp     %[step3_19],          $ac0,           31              \n\t"
554 
555         : [step3_19] "=r" (step3_19)
556         : [const_2_power_13] "r" (const_2_power_13),
557           [step2_19] "r" (step2_19), [step2_28] "r" (step2_28),
558           [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
559     );
560 
561     temp21 = step2_19 * cospi_24_64 + step2_28 * cospi_8_64;
562     step3_28 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
563 
564     step3_16 = step1_16 + step1_19;
565     step3_17 = step1_17 + step1_18;
566     step3_30 = step1_29 + step1_30;
567     step3_31 = step1_28 + step1_31;
568 
569     step2_20 = step1_23 - step1_20;
570     step2_27 = step1_24 - step1_27;
571 
572     __asm__ __volatile__ (
573         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
574         "mthi     $zero,                $ac0                            \n\t"
575         "msub     $ac0,                 %[step2_20],    %[cospi_24_64]  \n\t"
576         "msub     $ac0,                 %[step2_27],    %[cospi_8_64]   \n\t"
577         "extp     %[step3_20],          $ac0,           31              \n\t"
578 
579         : [step3_20] "=r" (step3_20)
580         : [const_2_power_13] "r" (const_2_power_13),
581           [step2_20] "r" (step2_20), [step2_27] "r" (step2_27),
582           [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
583     );
584 
585     temp21 = -step2_20 * cospi_8_64 + step2_27 * cospi_24_64;
586     step3_27 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
587 
588     step2_21 = step1_22 - step1_21;
589     step2_26 = step1_25 - step1_26;
590 
591     __asm__ __volatile__ (
592         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
593         "mthi     $zero,                $ac1                            \n\t"
594         "msub     $ac1,                 %[step2_21],    %[cospi_24_64]  \n\t"
595         "msub     $ac1,                 %[step2_26],    %[cospi_8_64]   \n\t"
596         "extp     %[step3_21],          $ac1,           31              \n\t"
597 
598         : [step3_21] "=r" (step3_21)
599         : [const_2_power_13] "r" (const_2_power_13),
600           [step2_21] "r" (step2_21), [step2_26] "r" (step2_26),
601           [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
602     );
603 
604     temp21 = -step2_21 * cospi_8_64 + step2_26 * cospi_24_64;
605     step3_26 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
606 
607     step3_22 = step1_21 + step1_22;
608     step3_23 = step1_20 + step1_23;
609     step3_24 = step1_24 + step1_27;
610     step3_25 = step1_25 + step1_26;
611 
612     step2_16 = step3_16 + step3_23;
613     step2_17 = step3_17 + step3_22;
614     step2_18 = step3_18 + step3_21;
615     step2_19 = step3_19 + step3_20;
616     step2_20 = step3_19 - step3_20;
617     step2_21 = step3_18 - step3_21;
618     step2_22 = step3_17 - step3_22;
619     step2_23 = step3_16 - step3_23;
620 
621     step2_24 = step3_31 - step3_24;
622     step2_25 = step3_30 - step3_25;
623     step2_26 = step3_29 - step3_26;
624     step2_27 = step3_28 - step3_27;
625     step2_28 = step3_28 + step3_27;
626     step2_29 = step3_29 + step3_26;
627     step2_30 = step3_30 + step3_25;
628     step2_31 = step3_31 + step3_24;
629 
630     __asm__ __volatile__ (
631         "lh       %[load1],             0(%[input])                     \n\t"
632         "lh       %[load2],             32(%[input])                    \n\t"
633         "lh       %[load3],             16(%[input])                    \n\t"
634         "lh       %[load4],             48(%[input])                    \n\t"
635 
636         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
637         "mthi     $zero,                $ac1                            \n\t"
638         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
639         "mthi     $zero,                $ac2                            \n\t"
640         "add      %[result1],           %[load1],       %[load2]        \n\t"
641         "sub      %[result2],           %[load1],       %[load2]        \n\t"
642         "madd     $ac1,                 %[result1],     %[cospi_16_64]  \n\t"
643         "madd     $ac2,                 %[result2],     %[cospi_16_64]  \n\t"
644         "extp     %[temp0],             $ac1,           31              \n\t"
645         "extp     %[temp1],             $ac2,           31              \n\t"
646 
647         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
648         "mthi     $zero,                $ac3                            \n\t"
649         "madd     $ac3,                 %[load3],       %[cospi_24_64]  \n\t"
650         "msub     $ac3,                 %[load4],       %[cospi_8_64]   \n\t"
651         "extp     %[temp2],             $ac3,           31              \n\t"
652 
653         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
654         "mthi     $zero,                $ac1                            \n\t"
655         "madd     $ac1,                 %[load3],       %[cospi_8_64]   \n\t"
656         "madd     $ac1,                 %[load4],       %[cospi_24_64]  \n\t"
657         "extp     %[temp3],             $ac1,           31              \n\t"
658 
659         "add      %[step1_0],          %[temp0],        %[temp3]        \n\t"
660         "add      %[step1_1],          %[temp1],        %[temp2]        \n\t"
661         "sub      %[step1_2],          %[temp1],        %[temp2]        \n\t"
662         "sub      %[step1_3],          %[temp0],        %[temp3]        \n\t"
663 
664         : [load1] "=&r" (load1), [load2] "=&r" (load2),
665           [load3] "=&r" (load3), [load4] "=&r" (load4),
666           [result1] "=&r" (result1), [result2] "=&r" (result2),
667           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
668           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
669           [step1_0] "=r" (step1_0), [step1_1] "=r" (step1_1),
670           [step1_2] "=r" (step1_2), [step1_3] "=r" (step1_3)
671         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
672           [cospi_16_64] "r" (cospi_16_64),
673           [cospi_24_64] "r" (cospi_24_64), [cospi_8_64] "r" (cospi_8_64)
674 
675     );
676 
677     __asm__ __volatile__ (
678         "lh       %[load1],             8(%[input])                     \n\t"
679         "lh       %[load2],             56(%[input])                    \n\t"
680         "lh       %[load3],             40(%[input])                    \n\t"
681         "lh       %[load4],             24(%[input])                    \n\t"
682 
683         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
684         "mthi     $zero,                $ac1                            \n\t"
685         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
686         "mthi     $zero,                $ac3                            \n\t"
687 
688         "madd     $ac1,                 %[load1],       %[cospi_28_64]  \n\t"
689         "msub     $ac1,                 %[load2],       %[cospi_4_64]   \n\t"
690         "extp     %[temp0],             $ac1,           31              \n\t"
691 
692         "madd     $ac3,                 %[load1],       %[cospi_4_64]   \n\t"
693         "madd     $ac3,                 %[load2],       %[cospi_28_64]  \n\t"
694         "extp     %[temp3],             $ac3,           31              \n\t"
695 
696         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
697         "mthi     $zero,                $ac1                            \n\t"
698         "mtlo     %[const_2_power_13],  $ac2                            \n\t"
699         "mthi     $zero,                $ac2                            \n\t"
700 
701         "madd     $ac2,                 %[load3],       %[cospi_12_64]  \n\t"
702         "msub     $ac2,                 %[load4],       %[cospi_20_64]  \n\t"
703         "extp     %[temp1],             $ac2,           31              \n\t"
704 
705         "madd     $ac1,                 %[load3],       %[cospi_20_64]  \n\t"
706         "madd     $ac1,                 %[load4],       %[cospi_12_64]  \n\t"
707         "extp     %[temp2],             $ac1,           31              \n\t"
708 
709         "mtlo     %[const_2_power_13],  $ac1                            \n\t"
710         "mthi     $zero,                $ac1                            \n\t"
711         "mtlo     %[const_2_power_13],  $ac3                            \n\t"
712         "mthi     $zero,                $ac3                            \n\t"
713 
714         "sub      %[load1],             %[temp3],       %[temp2]        \n\t"
715         "sub      %[load1],             %[load1],       %[temp0]        \n\t"
716         "add      %[load1],             %[load1],       %[temp1]        \n\t"
717 
718         "sub      %[load2],             %[temp0],       %[temp1]        \n\t"
719         "sub      %[load2],             %[load2],       %[temp2]        \n\t"
720         "add      %[load2],             %[load2],       %[temp3]        \n\t"
721 
722         "madd     $ac1,                 %[load1],       %[cospi_16_64]  \n\t"
723         "madd     $ac3,                 %[load2],       %[cospi_16_64]  \n\t"
724 
725         "extp     %[step1_5],           $ac1,           31              \n\t"
726         "extp     %[step1_6],           $ac3,           31              \n\t"
727         "add      %[step1_4],           %[temp0],       %[temp1]        \n\t"
728         "add      %[step1_7],           %[temp3],       %[temp2]        \n\t"
729 
730         : [load1] "=&r" (load1), [load2] "=&r" (load2),
731           [load3] "=&r" (load3), [load4] "=&r" (load4),
732           [temp0] "=&r" (temp0), [temp1] "=&r" (temp1),
733           [temp2] "=&r" (temp2), [temp3] "=&r" (temp3),
734           [step1_4] "=r" (step1_4), [step1_5] "=r" (step1_5),
735           [step1_6] "=r" (step1_6), [step1_7] "=r" (step1_7)
736         : [const_2_power_13] "r" (const_2_power_13), [input] "r" (input),
737           [cospi_20_64] "r" (cospi_20_64), [cospi_12_64] "r" (cospi_12_64),
738           [cospi_4_64] "r" (cospi_4_64), [cospi_28_64] "r" (cospi_28_64),
739           [cospi_16_64] "r" (cospi_16_64)
740     );
741 
742     step2_0 = step1_0 + step1_7;
743     step2_1 = step1_1 + step1_6;
744     step2_2 = step1_2 + step1_5;
745     step2_3 = step1_3 + step1_4;
746     step2_4 = step1_3 - step1_4;
747     step2_5 = step1_2 - step1_5;
748     step2_6 = step1_1 - step1_6;
749     step2_7 = step1_0 - step1_7;
750 
751     step1_0 = step2_0 + step3_15;
752     step1_1 = step2_1 + step3_14;
753     step1_2 = step2_2 + step3_13;
754     step1_3 = step2_3 + step3_12;
755     step1_4 = step2_4 + step3_11;
756     step1_5 = step2_5 + step3_10;
757     step1_6 = step2_6 + step3_9;
758     step1_7 = step2_7 + step3_8;
759     step1_8 = step2_7 - step3_8;
760     step1_9 = step2_6 - step3_9;
761     step1_10 = step2_5 - step3_10;
762     step1_11 = step2_4 - step3_11;
763     step1_12 = step2_3 - step3_12;
764     step1_13 = step2_2 - step3_13;
765     step1_14 = step2_1 - step3_14;
766     step1_15 = step2_0 - step3_15;
767 
768     __asm__ __volatile__ (
769         "sub      %[temp0],             %[step2_27],    %[step2_20]     \n\t"
770         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
771         "mthi     $zero,                $ac0                            \n\t"
772         "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
773         "extp     %[step1_20],          $ac0,           31              \n\t"
774 
775         : [temp0] "=&r" (temp0), [step1_20] "=r" (step1_20)
776         : [const_2_power_13] "r" (const_2_power_13),
777           [step2_20] "r" (step2_20), [step2_27] "r" (step2_27),
778           [cospi_16_64] "r" (cospi_16_64)
779     );
780 
781     temp21 = (step2_20 + step2_27) * cospi_16_64;
782     step1_27 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
783 
784     __asm__ __volatile__ (
785         "sub      %[temp0],             %[step2_26],    %[step2_21]     \n\t"
786         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
787         "mthi     $zero,                $ac0                            \n\t"
788         "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
789         "extp     %[step1_21],          $ac0,           31              \n\t"
790 
791         : [temp0] "=&r" (temp0), [step1_21] "=r" (step1_21)
792         : [const_2_power_13] "r" (const_2_power_13),
793           [step2_26] "r" (step2_26), [step2_21] "r" (step2_21),
794           [cospi_16_64] "r" (cospi_16_64)
795     );
796 
797     temp21 = (step2_21 + step2_26) * cospi_16_64;
798     step1_26 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
799 
800     __asm__ __volatile__ (
801         "sub      %[temp0],             %[step2_25],    %[step2_22]     \n\t"
802         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
803         "mthi     $zero,                $ac0                            \n\t"
804         "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
805         "extp     %[step1_22],          $ac0,           31              \n\t"
806 
807         : [temp0] "=&r" (temp0), [step1_22] "=r" (step1_22)
808         : [const_2_power_13] "r" (const_2_power_13),
809           [step2_25] "r" (step2_25), [step2_22] "r" (step2_22),
810           [cospi_16_64] "r" (cospi_16_64)
811     );
812 
813     temp21 = (step2_22 + step2_25) * cospi_16_64;
814     step1_25 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
815 
816     __asm__ __volatile__ (
817         "sub      %[temp0],             %[step2_24],    %[step2_23]     \n\t"
818         "mtlo     %[const_2_power_13],  $ac0                            \n\t"
819         "mthi     $zero,                $ac0                            \n\t"
820         "madd     $ac0,                 %[temp0],       %[cospi_16_64]  \n\t"
821         "extp     %[step1_23],          $ac0,           31              \n\t"
822 
823         : [temp0] "=&r" (temp0), [step1_23] "=r" (step1_23)
824         : [const_2_power_13] "r" (const_2_power_13),
825           [step2_24] "r" (step2_24), [step2_23] "r" (step2_23),
826           [cospi_16_64] "r" (cospi_16_64)
827     );
828 
829     temp21 = (step2_23 + step2_24) * cospi_16_64;
830     step1_24 = (temp21 + DCT_CONST_ROUNDING) >> DCT_CONST_BITS;
831 
832     // final stage
833     output[0 * 32] = step1_0 + step2_31;
834     output[1 * 32] = step1_1 + step2_30;
835     output[2 * 32] = step1_2 + step2_29;
836     output[3 * 32] = step1_3 + step2_28;
837     output[4 * 32] = step1_4 + step1_27;
838     output[5 * 32] = step1_5 + step1_26;
839     output[6 * 32] = step1_6 + step1_25;
840     output[7 * 32] = step1_7 + step1_24;
841     output[8 * 32] = step1_8 + step1_23;
842     output[9 * 32] = step1_9 + step1_22;
843     output[10 * 32] = step1_10 + step1_21;
844     output[11 * 32] = step1_11 + step1_20;
845     output[12 * 32] = step1_12 + step2_19;
846     output[13 * 32] = step1_13 + step2_18;
847     output[14 * 32] = step1_14 + step2_17;
848     output[15 * 32] = step1_15 + step2_16;
849     output[16 * 32] = step1_15 - step2_16;
850     output[17 * 32] = step1_14 - step2_17;
851     output[18 * 32] = step1_13 - step2_18;
852     output[19 * 32] = step1_12 - step2_19;
853     output[20 * 32] = step1_11 - step1_20;
854     output[21 * 32] = step1_10 - step1_21;
855     output[22 * 32] = step1_9 - step1_22;
856     output[23 * 32] = step1_8 - step1_23;
857     output[24 * 32] = step1_7 - step1_24;
858     output[25 * 32] = step1_6 - step1_25;
859     output[26 * 32] = step1_5 - step1_26;
860     output[27 * 32] = step1_4 - step1_27;
861     output[28 * 32] = step1_3 - step2_28;
862     output[29 * 32] = step1_2 - step2_29;
863     output[30 * 32] = step1_1 - step2_30;
864     output[31 * 32] = step1_0 - step2_31;
865 
866     input += 32;
867     output += 1;
868   }
869 }
870 
vp9_idct32x32_1024_add_dspr2(const int16_t * input,uint8_t * dest,int dest_stride)871 void vp9_idct32x32_1024_add_dspr2(const int16_t *input, uint8_t *dest,
872                                   int dest_stride) {
873   DECLARE_ALIGNED(32, int16_t,  out[32 * 32]);
874   int16_t *outptr = out;
875   uint32_t pos = 45;
876 
877   /* bit positon for extract from acc */
878   __asm__ __volatile__ (
879     "wrdsp      %[pos],     1           \n\t"
880     :
881     : [pos] "r" (pos)
882   );
883 
884   // Rows
885   idct32_rows_dspr2(input, outptr, 32);
886 
887   // Columns
888   vp9_idct32_cols_add_blk_dspr2(out, dest, dest_stride);
889 }
890 
vp9_idct32x32_34_add_dspr2(const int16_t * input,uint8_t * dest,int stride)891 void vp9_idct32x32_34_add_dspr2(const int16_t *input, uint8_t *dest,
892                                 int stride) {
893   DECLARE_ALIGNED(32, int16_t,  out[32 * 32]);
894   int16_t *outptr = out;
895   uint32_t i;
896   uint32_t pos = 45;
897 
898   /* bit positon for extract from acc */
899   __asm__ __volatile__ (
900     "wrdsp      %[pos],     1           \n\t"
901     :
902     : [pos] "r" (pos)
903   );
904 
905   // Rows
906   idct32_rows_dspr2(input, outptr, 8);
907 
908   outptr += 8;
909   __asm__ __volatile__ (
910       "sw     $zero,      0(%[outptr])     \n\t"
911       "sw     $zero,      4(%[outptr])     \n\t"
912       "sw     $zero,      8(%[outptr])     \n\t"
913       "sw     $zero,     12(%[outptr])     \n\t"
914       "sw     $zero,     16(%[outptr])     \n\t"
915       "sw     $zero,     20(%[outptr])     \n\t"
916       "sw     $zero,     24(%[outptr])     \n\t"
917       "sw     $zero,     28(%[outptr])     \n\t"
918       "sw     $zero,     32(%[outptr])     \n\t"
919       "sw     $zero,     36(%[outptr])     \n\t"
920       "sw     $zero,     40(%[outptr])     \n\t"
921       "sw     $zero,     44(%[outptr])     \n\t"
922 
923       :
924       : [outptr] "r" (outptr)
925   );
926 
927   for (i = 0; i < 31; ++i) {
928     outptr += 32;
929 
930     __asm__ __volatile__ (
931         "sw     $zero,      0(%[outptr])     \n\t"
932         "sw     $zero,      4(%[outptr])     \n\t"
933         "sw     $zero,      8(%[outptr])     \n\t"
934         "sw     $zero,     12(%[outptr])     \n\t"
935         "sw     $zero,     16(%[outptr])     \n\t"
936         "sw     $zero,     20(%[outptr])     \n\t"
937         "sw     $zero,     24(%[outptr])     \n\t"
938         "sw     $zero,     28(%[outptr])     \n\t"
939         "sw     $zero,     32(%[outptr])     \n\t"
940         "sw     $zero,     36(%[outptr])     \n\t"
941         "sw     $zero,     40(%[outptr])     \n\t"
942         "sw     $zero,     44(%[outptr])     \n\t"
943 
944         :
945         : [outptr] "r" (outptr)
946     );
947   }
948 
949   // Columns
950   vp9_idct32_cols_add_blk_dspr2(out, dest, stride);
951 }
952 
vp9_idct32x32_1_add_dspr2(const int16_t * input,uint8_t * dest,int stride)953 void vp9_idct32x32_1_add_dspr2(const int16_t *input, uint8_t *dest,
954                                int stride) {
955   int       r, out;
956   int32_t   a1, absa1;
957   int32_t   vector_a1;
958   int32_t   t1, t2, t3, t4;
959   int32_t   vector_1, vector_2, vector_3, vector_4;
960   uint32_t  pos = 45;
961 
962   /* bit positon for extract from acc */
963   __asm__ __volatile__ (
964     "wrdsp      %[pos],     1           \n\t"
965 
966     :
967     : [pos] "r" (pos)
968   );
969 
970   out = DCT_CONST_ROUND_SHIFT_TWICE_COSPI_16_64(input[0]);
971   __asm__ __volatile__ (
972       "addi     %[out],    %[out],    32      \n\t"
973       "sra      %[a1],     %[out],    6       \n\t"
974 
975       : [out] "+r" (out), [a1] "=r" (a1)
976       :
977   );
978 
979   if (a1 < 0) {
980     /* use quad-byte
981      * input and output memory are four byte aligned */
982     __asm__ __volatile__ (
983         "abs        %[absa1],     %[a1]         \n\t"
984         "replv.qb   %[vector_a1], %[absa1]      \n\t"
985 
986         : [absa1] "=r" (absa1), [vector_a1] "=r" (vector_a1)
987         : [a1] "r" (a1)
988     );
989 
990     for (r = 32; r--;) {
991       __asm__ __volatile__ (
992           "lw             %[t1],          0(%[dest])                      \n\t"
993           "lw             %[t2],          4(%[dest])                      \n\t"
994           "lw             %[t3],          8(%[dest])                      \n\t"
995           "lw             %[t4],          12(%[dest])                     \n\t"
996           "subu_s.qb      %[vector_1],    %[t1],          %[vector_a1]    \n\t"
997           "subu_s.qb      %[vector_2],    %[t2],          %[vector_a1]    \n\t"
998           "subu_s.qb      %[vector_3],    %[t3],          %[vector_a1]    \n\t"
999           "subu_s.qb      %[vector_4],    %[t4],          %[vector_a1]    \n\t"
1000           "sw             %[vector_1],    0(%[dest])                      \n\t"
1001           "sw             %[vector_2],    4(%[dest])                      \n\t"
1002           "sw             %[vector_3],    8(%[dest])                      \n\t"
1003           "sw             %[vector_4],    12(%[dest])                     \n\t"
1004 
1005           "lw             %[t1],          16(%[dest])                     \n\t"
1006           "lw             %[t2],          20(%[dest])                     \n\t"
1007           "lw             %[t3],          24(%[dest])                     \n\t"
1008           "lw             %[t4],          28(%[dest])                     \n\t"
1009           "subu_s.qb      %[vector_1],    %[t1],          %[vector_a1]    \n\t"
1010           "subu_s.qb      %[vector_2],    %[t2],          %[vector_a1]    \n\t"
1011           "subu_s.qb      %[vector_3],    %[t3],          %[vector_a1]    \n\t"
1012           "subu_s.qb      %[vector_4],    %[t4],          %[vector_a1]    \n\t"
1013           "sw             %[vector_1],    16(%[dest])                     \n\t"
1014           "sw             %[vector_2],    20(%[dest])                     \n\t"
1015           "sw             %[vector_3],    24(%[dest])                     \n\t"
1016           "sw             %[vector_4],    28(%[dest])                     \n\t"
1017 
1018           "add            %[dest],        %[dest],        %[stride]       \n\t"
1019 
1020           : [t1] "=&r" (t1), [t2] "=&r" (t2), [t3] "=&r" (t3), [t4] "=&r" (t4),
1021             [vector_1] "=&r" (vector_1), [vector_2] "=&r" (vector_2),
1022             [vector_3] "=&r" (vector_3), [vector_4] "=&r" (vector_4),
1023             [dest] "+&r" (dest)
1024           : [stride] "r" (stride), [vector_a1] "r" (vector_a1)
1025       );
1026     }
1027   } else {
1028     /* use quad-byte
1029      * input and output memory are four byte aligned */
1030     __asm__ __volatile__ (
1031         "replv.qb       %[vector_a1],   %[a1]     \n\t"
1032 
1033         : [vector_a1] "=r" (vector_a1)
1034         : [a1] "r" (a1)
1035     );
1036 
1037     for (r = 32; r--;) {
1038       __asm__ __volatile__ (
1039           "lw             %[t1],          0(%[dest])                      \n\t"
1040           "lw             %[t2],          4(%[dest])                      \n\t"
1041           "lw             %[t3],          8(%[dest])                      \n\t"
1042           "lw             %[t4],          12(%[dest])                     \n\t"
1043           "addu_s.qb      %[vector_1],    %[t1],          %[vector_a1]    \n\t"
1044           "addu_s.qb      %[vector_2],    %[t2],          %[vector_a1]    \n\t"
1045           "addu_s.qb      %[vector_3],    %[t3],          %[vector_a1]    \n\t"
1046           "addu_s.qb      %[vector_4],    %[t4],          %[vector_a1]    \n\t"
1047           "sw             %[vector_1],    0(%[dest])                      \n\t"
1048           "sw             %[vector_2],    4(%[dest])                      \n\t"
1049           "sw             %[vector_3],    8(%[dest])                      \n\t"
1050           "sw             %[vector_4],    12(%[dest])                     \n\t"
1051 
1052           "lw             %[t1],          16(%[dest])                     \n\t"
1053           "lw             %[t2],          20(%[dest])                     \n\t"
1054           "lw             %[t3],          24(%[dest])                     \n\t"
1055           "lw             %[t4],          28(%[dest])                     \n\t"
1056           "addu_s.qb      %[vector_1],    %[t1],          %[vector_a1]    \n\t"
1057           "addu_s.qb      %[vector_2],    %[t2],          %[vector_a1]    \n\t"
1058           "addu_s.qb      %[vector_3],    %[t3],          %[vector_a1]    \n\t"
1059           "addu_s.qb      %[vector_4],    %[t4],          %[vector_a1]    \n\t"
1060           "sw             %[vector_1],    16(%[dest])                     \n\t"
1061           "sw             %[vector_2],    20(%[dest])                     \n\t"
1062           "sw             %[vector_3],    24(%[dest])                     \n\t"
1063           "sw             %[vector_4],    28(%[dest])                     \n\t"
1064 
1065           "add            %[dest],        %[dest],        %[stride]       \n\t"
1066 
1067           : [t1] "=&r" (t1), [t2] "=&r" (t2), [t3] "=&r" (t3), [t4] "=&r" (t4),
1068             [vector_1] "=&r" (vector_1), [vector_2] "=&r" (vector_2),
1069             [vector_3] "=&r" (vector_3), [vector_4] "=&r" (vector_4),
1070             [dest] "+&r" (dest)
1071           : [stride] "r" (stride), [vector_a1] "r" (vector_a1)
1072       );
1073     }
1074   }
1075 }
1076 #endif  // #if HAVE_DSPR2
1077