Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 1 | @ Tremolo library |
Gloria Wang | 2da723a | 2010-03-18 15:56:16 -0700 | [diff] [blame] | 2 | @----------------------------------------------------------------------- |
| 3 | @ Copyright (C) 2002-2009, Xiph.org Foundation |
| 4 | @ Copyright (C) 2010, Robin Watts for Pinknoise Productions Ltd |
| 5 | @ All rights reserved. |
| 6 | |
| 7 | @ Redistribution and use in source and binary forms, with or without |
| 8 | @ modification, are permitted provided that the following conditions |
| 9 | @ are met: |
| 10 | |
| 11 | @ * Redistributions of source code must retain the above copyright |
| 12 | @ notice, this list of conditions and the following disclaimer. |
| 13 | @ * Redistributions in binary form must reproduce the above |
| 14 | @ copyright notice, this list of conditions and the following disclaimer |
| 15 | @ in the documentation and/or other materials provided with the |
| 16 | @ distribution. |
| 17 | @ * Neither the names of the Xiph.org Foundation nor Pinknoise |
| 18 | @ Productions Ltd nor the names of its contributors may be used to |
| 19 | @ endorse or promote products derived from this software without |
| 20 | @ specific prior written permission. |
| 21 | @ |
| 22 | @ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 23 | @ "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 24 | @ LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 25 | @ A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 26 | @ OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 27 | @ SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 28 | @ LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 29 | @ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 30 | @ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 31 | @ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 32 | @ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 33 | @ ---------------------------------------------------------------------- |
Gloria Wang | 7913073 | 2010-02-08 14:41:04 -0800 | [diff] [blame] | 34 | |
| 35 | .text |
| 36 | |
| 37 | @ low accuracy version |
| 38 | |
| 39 | .global mdct_backwardARM |
| 40 | .global mdct_shift_right |
| 41 | .global mdct_unroll_prelap |
| 42 | .global mdct_unroll_part2 |
| 43 | .global mdct_unroll_part3 |
| 44 | .global mdct_unroll_postlap |
| 45 | |
| 46 | .extern sincos_lookup0 |
| 47 | .extern sincos_lookup1 |
| 48 | |
| 49 | mdct_unroll_prelap: |
| 50 | @ r0 = out |
| 51 | @ r1 = post |
| 52 | @ r2 = r |
| 53 | @ r3 = step |
| 54 | STMFD r13!,{r4-r7,r14} |
| 55 | MVN r4, #0x8000 |
| 56 | MOV r3, r3, LSL #1 |
| 57 | SUB r1, r2, r1 @ r1 = r - post |
| 58 | SUBS r1, r1, #16 @ r1 = r - post - 16 |
| 59 | BLT unroll_over |
| 60 | unroll_loop: |
| 61 | LDMDB r2!,{r5,r6,r7,r12} |
| 62 | |
| 63 | MOV r5, r5, ASR #9 @ r5 = (*--r)>>9 |
| 64 | MOV r6, r6, ASR #9 @ r6 = (*--r)>>9 |
| 65 | MOV r7, r7, ASR #9 @ r7 = (*--r)>>9 |
| 66 | MOV r12,r12,ASR #9 @ r12= (*--r)>>9 |
| 67 | |
| 68 | MOV r14,r12,ASR #15 |
| 69 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 70 | EORNE r12,r4, r14,ASR #31 |
| 71 | STRH r12,[r0], r3 |
| 72 | |
| 73 | MOV r14,r7, ASR #15 |
| 74 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 75 | EORNE r7, r4, r14,ASR #31 |
| 76 | STRH r7, [r0], r3 |
| 77 | |
| 78 | MOV r14,r6, ASR #15 |
| 79 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 80 | EORNE r6, r4, r14,ASR #31 |
| 81 | STRH r6, [r0], r3 |
| 82 | |
| 83 | MOV r14,r5, ASR #15 |
| 84 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 85 | EORNE r5, r4, r14,ASR #31 |
| 86 | STRH r5, [r0], r3 |
| 87 | |
| 88 | SUBS r1, r1, #16 |
| 89 | BGE unroll_loop |
| 90 | |
| 91 | unroll_over: |
| 92 | ADDS r1, r1, #16 |
| 93 | BLE unroll_end |
| 94 | unroll_loop2: |
| 95 | LDR r5,[r2,#-4]! |
| 96 | @ stall |
| 97 | @ stall (Xscale) |
| 98 | MOV r5, r5, ASR #9 @ r5 = (*--r)>>9 |
| 99 | MOV r14,r5, ASR #15 |
| 100 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 101 | EORNE r5, r4, r14,ASR #31 |
| 102 | STRH r5, [r0], r3 |
| 103 | SUBS r1, r1, #4 |
| 104 | BGT unroll_loop2 |
| 105 | unroll_end: |
| 106 | LDMFD r13!,{r4-r7,PC} |
| 107 | |
| 108 | mdct_unroll_postlap: |
| 109 | @ r0 = out |
| 110 | @ r1 = post |
| 111 | @ r2 = l |
| 112 | @ r3 = step |
| 113 | STMFD r13!,{r4-r7,r14} |
| 114 | MVN r4, #0x8000 |
| 115 | MOV r3, r3, LSL #1 |
| 116 | SUB r1, r1, r2 @ r1 = post - l |
| 117 | MOV r1, r1, ASR #1 @ r1 = (post - l)>>1 |
| 118 | SUBS r1, r1, #16 @ r1 = ((post - l)>>1) - 4 |
| 119 | BLT unroll_over3 |
| 120 | unroll_loop3: |
| 121 | LDR r12,[r2],#8 |
| 122 | LDR r7, [r2],#8 |
| 123 | LDR r6, [r2],#8 |
| 124 | LDR r5, [r2],#8 |
| 125 | |
| 126 | RSB r12,r12,#0 |
| 127 | RSB r5, r5, #0 |
| 128 | RSB r6, r6, #0 |
| 129 | RSB r7, r7, #0 |
| 130 | |
| 131 | MOV r12, r12,ASR #9 @ r12= (-*l)>>9 |
| 132 | MOV r5, r5, ASR #9 @ r5 = (-*l)>>9 |
| 133 | MOV r6, r6, ASR #9 @ r6 = (-*l)>>9 |
| 134 | MOV r7, r7, ASR #9 @ r7 = (-*l)>>9 |
| 135 | |
| 136 | MOV r14,r12,ASR #15 |
| 137 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 138 | EORNE r12,r4, r14,ASR #31 |
| 139 | STRH r12,[r0], r3 |
| 140 | |
| 141 | MOV r14,r7, ASR #15 |
| 142 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 143 | EORNE r7, r4, r14,ASR #31 |
| 144 | STRH r7, [r0], r3 |
| 145 | |
| 146 | MOV r14,r6, ASR #15 |
| 147 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 148 | EORNE r6, r4, r14,ASR #31 |
| 149 | STRH r6, [r0], r3 |
| 150 | |
| 151 | MOV r14,r5, ASR #15 |
| 152 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 153 | EORNE r5, r4, r14,ASR #31 |
| 154 | STRH r5, [r0], r3 |
| 155 | |
| 156 | SUBS r1, r1, #16 |
| 157 | BGE unroll_loop3 |
| 158 | |
| 159 | unroll_over3: |
| 160 | ADDS r1, r1, #16 |
| 161 | BLE unroll_over4 |
| 162 | unroll_loop4: |
| 163 | LDR r5,[r2], #8 |
| 164 | @ stall |
| 165 | @ stall (Xscale) |
| 166 | RSB r5, r5, #0 |
| 167 | MOV r5, r5, ASR #9 @ r5 = (-*l)>>9 |
| 168 | MOV r14,r5, ASR #15 |
| 169 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 170 | EORNE r5, r4, r14,ASR #31 |
| 171 | STRH r5, [r0], r3 |
| 172 | SUBS r1, r1, #4 |
| 173 | BGT unroll_loop4 |
| 174 | unroll_over4: |
| 175 | LDMFD r13!,{r4-r7,PC} |
| 176 | |
| 177 | mdct_unroll_part2: |
| 178 | @ r0 = out |
| 179 | @ r1 = post |
| 180 | @ r2 = l |
| 181 | @ r3 = r |
| 182 | @ <> = step |
| 183 | @ <> = wL |
| 184 | @ <> = wR |
| 185 | MOV r12,r13 |
| 186 | STMFD r13!,{r4,r6-r11,r14} |
| 187 | LDMFD r12,{r8,r9,r10} @ r8 = step |
| 188 | @ r9 = wL |
| 189 | @ r10= wR |
| 190 | MVN r4, #0x8000 |
| 191 | MOV r8, r8, LSL #1 |
| 192 | SUBS r1, r3, r1 @ r1 = (r - post) |
| 193 | BLE unroll_over5 |
| 194 | unroll_loop5: |
| 195 | LDR r12,[r2, #-8]! @ r12= *l (but l -= 2 first) |
| 196 | LDR r7, [r3, #-4]! @ r7 = *--r |
| 197 | LDRB r6, [r10,#-1]! @ r6 = *--wR |
| 198 | LDRB r11,[r9],#1 @ r11= *wL++ |
| 199 | |
| 200 | MOV r12, r12, ASR #8 |
| 201 | @ Can save a cycle here, at the cost of 1bit errors in rounding |
| 202 | MUL r11,r12,r11 @ r11 = *l * *wL++ |
| 203 | MOV r7, r7, ASR #8 |
| 204 | MLA r6, r7, r6, r11 @ r6 = *--r * *--wR |
| 205 | MOV r6, r6, ASR #9 |
| 206 | MOV r14,r6, ASR #15 |
| 207 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 208 | EORNE r6, r4, r14,ASR #31 |
| 209 | STRH r6, [r0], r8 |
| 210 | |
| 211 | SUBS r1, r1, #4 |
| 212 | BGT unroll_loop5 |
| 213 | |
| 214 | unroll_over5: |
| 215 | LDMFD r13!,{r4,r6-r11,PC} |
| 216 | |
| 217 | mdct_unroll_part3: |
| 218 | @ r0 = out |
| 219 | @ r1 = post |
| 220 | @ r2 = l |
| 221 | @ r3 = r |
| 222 | @ <> = step |
| 223 | @ <> = wL |
| 224 | @ <> = wR |
| 225 | MOV r12,r13 |
| 226 | STMFD r13!,{r4,r6-r11,r14} |
| 227 | LDMFD r12,{r8,r9,r10} @ r8 = step |
| 228 | @ r9 = wL |
| 229 | @ r10= wR |
| 230 | MVN r4, #0x8000 |
| 231 | MOV r8, r8, LSL #1 |
| 232 | SUBS r1, r1, r3 @ r1 = (post - r) |
| 233 | BLE unroll_over6 |
| 234 | unroll_loop6: |
| 235 | LDR r12,[r2],#8 @ r12= *l (but l += 2 first) |
| 236 | LDR r7, [r3],#4 @ r7 = *r++ |
| 237 | LDRB r11,[r9],#1 @ r11= *wL++ |
| 238 | LDRB r6, [r10,#-1]! @ r6 = *--wR |
| 239 | |
| 240 | @ Can save a cycle here, at the cost of 1bit errors in rounding |
| 241 | MOV r12,r12,ASR #8 |
| 242 | MUL r11,r12,r11 @ (r14,r11) = *l * *wL++ |
| 243 | MOV r7, r7, ASR #8 |
| 244 | MUL r6, r7, r6 @ (r14,r6) = *--r * *--wR |
| 245 | SUB r6, r6, r11 |
| 246 | MOV r6, r6, ASR #9 |
| 247 | MOV r14,r6, ASR #15 |
| 248 | TEQ r14,r14,ASR #31 @ if r14==0 || r14==-1 then in range |
| 249 | EORNE r6, r4, r14,ASR #31 |
| 250 | STRH r6, [r0], r8 |
| 251 | |
| 252 | SUBS r1, r1, #4 |
| 253 | BGT unroll_loop6 |
| 254 | |
| 255 | unroll_over6: |
| 256 | LDMFD r13!,{r4,r6-r11,PC} |
| 257 | |
| 258 | mdct_shift_right: |
| 259 | @ r0 = n |
| 260 | @ r1 = in |
| 261 | @ r2 = right |
| 262 | STMFD r13!,{r4-r11,r14} |
| 263 | |
| 264 | MOV r0, r0, LSR #2 @ n >>= 2 |
| 265 | ADD r1, r1, #4 |
| 266 | |
| 267 | SUBS r0, r0, #8 |
| 268 | BLT sr_less_than_8 |
| 269 | sr_loop: |
| 270 | LDR r3, [r1], #8 |
| 271 | LDR r4, [r1], #8 |
| 272 | LDR r5, [r1], #8 |
| 273 | LDR r6, [r1], #8 |
| 274 | LDR r7, [r1], #8 |
| 275 | LDR r8, [r1], #8 |
| 276 | LDR r12,[r1], #8 |
| 277 | LDR r14,[r1], #8 |
| 278 | SUBS r0, r0, #8 |
| 279 | STMIA r2!,{r3,r4,r5,r6,r7,r8,r12,r14} |
| 280 | BGE sr_loop |
| 281 | sr_less_than_8: |
| 282 | ADDS r0, r0, #8 |
| 283 | BEQ sr_end |
| 284 | sr_loop2: |
| 285 | LDR r3, [r1], #8 |
| 286 | SUBS r0, r0, #1 |
| 287 | STR r3, [r2], #4 |
| 288 | BGT sr_loop2 |
| 289 | sr_end: |
| 290 | LDMFD r13!,{r4-r11,PC} |
| 291 | |
| 292 | mdct_backwardARM: |
| 293 | @ r0 = n |
| 294 | @ r1 = in |
| 295 | STMFD r13!,{r4-r11,r14} |
| 296 | |
| 297 | MOV r2, #1<<4 @ r2 = 1<<shift |
| 298 | MOV r3, #13-4 @ r3 = 13-shift |
| 299 | find_shift_loop: |
| 300 | TST r0, r2 @ if (n & (1<<shift)) == 0 |
| 301 | MOV r2, r2, LSL #1 |
| 302 | SUBEQ r3, r3, #1 @ shift-- |
| 303 | BEQ find_shift_loop |
| 304 | MOV r2, #2 |
| 305 | MOV r2, r2, LSL r3 @ r2 = step = 2<<shift |
| 306 | |
| 307 | @ presymmetry |
| 308 | @ r0 = n (a multiple of 4) |
| 309 | @ r1 = in |
| 310 | @ r2 = step |
| 311 | @ r3 = shift |
| 312 | |
| 313 | ADD r4, r1, r0, LSL #1 @ r4 = aX = in+(n>>1) |
| 314 | ADD r14,r1, r0 @ r14= in+(n>>2) |
| 315 | SUB r4, r4, #3*4 @ r4 = aX = in+n2-3 |
| 316 | LDR r5, =sincos_lookup0 @ r5 = T=sincos_lookup0 |
| 317 | |
| 318 | presymmetry_loop1: |
| 319 | LDR r7, [r4,#8] @ r6 = s2 = aX[2] |
| 320 | LDRB r11,[r5,#1] @ r11= T[1] |
| 321 | LDR r6, [r4],#-16 @ r6 = s0 = aX[0] |
| 322 | LDRB r10,[r5],r2 @ r10= T[0] T += step |
| 323 | MOV r6, r6, ASR #8 |
| 324 | MOV r7, r7, ASR #8 |
| 325 | |
| 326 | @ XPROD31(s0, s2, T[0], T[1], 0xaX[0], &ax[2]) |
| 327 | MUL r9, r6, r10 @ r9 = s0*T[0] |
| 328 | RSB r6, r6, #0 |
| 329 | MLA r9, r7, r11,r9 @ r9 += s2*T[1] |
| 330 | CMP r4, r14 |
| 331 | MUL r12,r7, r10 @ r12 = s2*T[0] |
| 332 | STR r9, [r4,#16] @ aX[0] = r9 |
| 333 | MLA r12,r6, r11,r12 @ r12 -= s0*T[1] |
| 334 | STR r12,[r4,#8+16] @ aX[2] = r12 |
| 335 | |
| 336 | BGE presymmetry_loop1 @ while (aX >= in+n4) |
| 337 | |
| 338 | presymmetry_loop2: |
| 339 | LDR r6, [r4],#-16 @ r6 = s0 = aX[0] |
| 340 | LDRB r10,[r5,#1] @ r10= T[1] |
| 341 | LDR r7, [r4,#16+8] @ r6 = s2 = aX[2] |
| 342 | LDRB r11,[r5],-r2 @ r11= T[0] T -= step |
| 343 | MOV r6, r6, ASR #8 |
| 344 | MOV r7, r7, ASR #8 |
| 345 | |
| 346 | @ XPROD31(s0, s2, T[1], T[0], 0xaX[0], &ax[2]) |
| 347 | MUL r9, r6, r10 @ r9 = s0*T[1] |
| 348 | RSB r6, r6, #0 |
| 349 | MLA r9, r7, r11,r9 @ r9 += s2*T[0] |
| 350 | CMP r4, r1 |
| 351 | MUL r12,r7, r10 @ r12 = s2*T[1] |
| 352 | STR r9, [r4,#16] @ aX[0] = r9 |
| 353 | MLA r12,r6, r11,r12 @ r12 -= s0*T[0] |
| 354 | STR r12,[r4,#8+16] @ aX[2] = r12 |
| 355 | |
| 356 | BGE presymmetry_loop2 @ while (aX >= in) |
| 357 | |
| 358 | @ r0 = n |
| 359 | @ r1 = in |
| 360 | @ r2 = step |
| 361 | @ r3 = shift |
| 362 | STMFD r13!,{r3} |
| 363 | LDR r5, =sincos_lookup0 @ r5 = T=sincos_lookup0 |
| 364 | ADD r4, r1, r0, LSL #1 @ r4 = aX = in+(n>>1) |
| 365 | SUB r4, r4, #4*4 @ r4 = aX = in+(n>>1)-4 |
| 366 | LDRB r11,[r5,#1] @ r11= T[1] |
| 367 | LDRB r10,[r5],r2 @ r10= T[0] T += step |
| 368 | presymmetry_loop3: |
| 369 | LDR r8, [r1],#16 @ r8 = ro0 = bX[0] |
| 370 | LDR r9, [r1,#8-16] @ r9 = ro2 = bX[2] |
| 371 | LDR r6, [r4],#-16 @ r6 = ri0 = aX[0] |
| 372 | LDR r7, [r4,#8+16] @ r7 = ri2 = aX[2] |
| 373 | MOV r8, r8, ASR #8 |
| 374 | MOV r9, r9, ASR #8 |
| 375 | MOV r6, r6, ASR #8 |
| 376 | |
| 377 | @ XNPROD31( ro2, ro0, T[1], T[0], 0xaX[0], &aX[2] ) |
| 378 | @ aX[0] = (ro2*T[1] - ro0*T[0])>>31 aX[2] = (ro0*T[1] + ro2*T[0])>>31 |
| 379 | MUL r12,r8, r11 @ r12 = ro0*T[1] |
| 380 | MOV r7, r7, ASR #8 |
| 381 | MLA r12,r9, r10,r12 @ r12 += ro2*T[0] |
| 382 | RSB r8, r8, #0 @ r8 = -ro0 |
| 383 | MUL r3, r9, r11 @ r3 = ro2*T[1] |
| 384 | LDRB r11,[r5,#1] @ r11= T[1] |
| 385 | MLA r3, r8, r10,r3 @ r3 -= ro0*T[0] |
| 386 | LDRB r10,[r5],r2 @ r10= T[0] T += step |
| 387 | STR r12,[r4,#16+8] |
| 388 | STR r3, [r4,#16] |
| 389 | |
| 390 | @ XNPROD31( ri2, ri0, T[0], T[1], 0xbX[0], &bX[2] ) |
| 391 | @ bX[0] = (ri2*T[0] - ri0*T[1])>>31 bX[2] = (ri0*T[0] + ri2*T[1])>>31 |
| 392 | MUL r12,r6, r10 @ r12 = ri0*T[0] |
| 393 | RSB r6, r6, #0 @ r6 = -ri0 |
| 394 | MLA r12,r7, r11,r12 @ r12 += ri2*T[1] |
| 395 | CMP r4, r1 |
| 396 | MUL r3, r7, r10 @ r3 = ri2*T[0] |
| 397 | STR r12,[r1,#8-16] |
| 398 | MLA r3, r6, r11,r3 @ r3 -= ri0*T[1] |
| 399 | STR r3, [r1,#-16] |
| 400 | |
| 401 | BGE presymmetry_loop3 |
| 402 | |
| 403 | SUB r1,r1,r0 @ r1 = in -= n>>2 (i.e. restore in) |
| 404 | |
| 405 | LDR r3,[r13] |
| 406 | STR r2,[r13,#-4]! |
| 407 | |
| 408 | @ mdct_butterflies |
| 409 | @ r0 = n = (points * 2) |
| 410 | @ r1 = in = x |
| 411 | @ r2 = i |
| 412 | @ r3 = shift |
| 413 | STMFD r13!,{r0-r1} |
| 414 | RSBS r4,r3,#6 @ r4 = stages = 7-shift then --stages |
| 415 | LDR r5,=sincos_lookup0 |
| 416 | BLE no_generics |
| 417 | MOV r14,#4 @ r14= 4 (i=0) |
| 418 | MOV r6, r14,LSL r3 @ r6 = (4<<i)<<shift |
| 419 | mdct_butterflies_loop1: |
| 420 | MOV r0, r0, LSR #1 @ r0 = points>>i = POINTS |
| 421 | MOV r2, r14,LSR #2 @ r2 = (1<<i)-j (j=0) |
| 422 | STMFD r13!,{r4,r14} |
| 423 | mdct_butterflies_loop2: |
| 424 | |
| 425 | @ mdct_butterfly_generic(x+POINTS*j, POINTS, 4<<(i+shift)) |
| 426 | @ mdct_butterfly_generic(r1, r0, r6) |
| 427 | @ r0 = points |
| 428 | @ r1 = x |
| 429 | @ preserve r2 (external loop counter) |
| 430 | @ preserve r3 |
| 431 | @ preserve r4 (external loop counter) |
| 432 | @ r5 = T = sincos_lookup0 |
| 433 | @ r6 = step |
| 434 | @ preserve r14 |
| 435 | |
| 436 | STR r2,[r13,#-4]! @ stack r2 |
| 437 | ADD r1,r1,r0,LSL #1 @ r1 = x2+4 = x + (POINTS>>1) |
| 438 | ADD r7,r1,r0,LSL #1 @ r7 = x1+4 = x + POINTS |
| 439 | ADD r12,r5,#1024 @ r12= sincos_lookup0+1024 |
| 440 | |
| 441 | mdct_bufferfly_generic_loop1: |
| 442 | LDMDB r7!,{r2,r3,r8,r11} @ r2 = x1[0] |
| 443 | @ r3 = x1[1] |
| 444 | @ r8 = x1[2] |
| 445 | @ r11= x1[3] x1 -= 4 |
| 446 | LDMDB r1!,{r4,r9,r10,r14} @ r4 = x2[0] |
| 447 | @ r9 = x2[1] |
| 448 | @ r10= x2[2] |
| 449 | @ r14= x2[3] x2 -= 4 |
| 450 | |
| 451 | SUB r2, r2, r3 @ r2 = s0 = x1[0] - x1[1] |
| 452 | ADD r3, r2, r3, LSL #1 @ r3 = x1[0] + x1[1] (-> x1[0]) |
| 453 | SUB r11,r11,r8 @ r11= s1 = x1[3] - x1[2] |
| 454 | ADD r8, r11,r8, LSL #1 @ r8 = x1[3] + x1[2] (-> x1[2]) |
| 455 | SUB r9, r9, r4 @ r9 = s2 = x2[1] - x2[0] |
| 456 | ADD r4, r9, r4, LSL #1 @ r4 = x2[1] + x2[0] (-> x1[1]) |
| 457 | SUB r14,r14,r10 @ r14= s3 = x2[3] - x2[2] |
| 458 | ADD r10,r14,r10,LSL #1 @ r10= x2[3] + x2[2] (-> x1[3]) |
| 459 | STMIA r7,{r3,r4,r8,r10} |
| 460 | |
| 461 | @ r0 = points |
| 462 | @ r1 = x2 |
| 463 | @ r2 = s0 |
| 464 | @ r3 free |
| 465 | @ r4 free |
| 466 | @ r5 = T |
| 467 | @ r6 = step |
| 468 | @ r7 = x1 |
| 469 | @ r8 free |
| 470 | @ r9 = s2 |
| 471 | @ r10 free |
| 472 | @ r11= s1 |
| 473 | @ r12= limit |
| 474 | @ r14= s3 |
| 475 | |
| 476 | LDRB r8, [r5,#1] @ r8 = T[1] |
| 477 | LDRB r10,[r5],r6 @ r10= T[0] T += step |
| 478 | MOV r2, r2, ASR #8 |
| 479 | MOV r11,r11,ASR #8 |
| 480 | MOV r9, r9, ASR #8 |
| 481 | MOV r14,r14,ASR #8 |
| 482 | |
| 483 | @ XPROD31(s1, s0, T[0], T[1], &x2[0], &x2[2]) |
| 484 | @ x2[0] = (s1*T[0] + s0*T[1])>>31 x2[2] = (s0*T[0] - s1*T[1])>>31 |
| 485 | @ stall Xscale |
| 486 | MUL r3, r2, r8 @ r3 = s0*T[1] |
| 487 | MLA r3, r11,r10,r3 @ r3 += s1*T[0] |
| 488 | RSB r11,r11,#0 |
| 489 | MUL r4, r8, r11 @ r4 = -s1*T[1] |
| 490 | MLA r4, r2, r10,r4 @ r4 += s0*T[0] = Value for x2[2] |
| 491 | MOV r2, r3 @ r2 = r3 = Value for x2[0] |
| 492 | |
| 493 | @ XPROD31(s2, s3, T[0], T[1], &x2[1], &x2[3]) |
| 494 | @ x2[1] = (s2*T[0] + s3*T[1])>>31 x2[3] = (s3*T[0] - s2*T[1])>>31 |
| 495 | MUL r3, r9, r10 @ r3 = s2*T[0] |
| 496 | MLA r3, r14,r8, r3 @ r3 += s3*T[1] = Value for x2[1] |
| 497 | RSB r9, r9, #0 |
| 498 | MUL r11,r14,r10 @ r11 = s3*T[0] |
| 499 | MLA r11,r9, r8, r11 @ r11 -= s2*T[1] = Value for x2[3] |
| 500 | CMP r5, r12 |
| 501 | |
| 502 | STMIA r1,{r2,r3,r4,r11} |
| 503 | |
| 504 | BLT mdct_bufferfly_generic_loop1 |
| 505 | |
| 506 | SUB r12,r12,#1024 |
| 507 | mdct_bufferfly_generic_loop2: |
| 508 | LDMDB r7!,{r2,r3,r9,r10} @ r2 = x1[0] |
| 509 | @ r3 = x1[1] |
| 510 | @ r9 = x1[2] |
| 511 | @ r10= x1[3] x1 -= 4 |
| 512 | LDMDB r1!,{r4,r8,r11,r14} @ r4 = x2[0] |
| 513 | @ r8 = x2[1] |
| 514 | @ r11= x2[2] |
| 515 | @ r14= x2[3] x2 -= 4 |
| 516 | |
| 517 | SUB r2, r2, r3 @ r2 = s0 = x1[0] - x1[1] |
| 518 | ADD r3, r2, r3, LSL #1 @ r3 = x1[0] + x1[1] (-> x1[0]) |
| 519 | SUB r9, r9,r10 @ r9 = s1 = x1[2] - x1[3] |
| 520 | ADD r10,r9,r10, LSL #1 @ r10= x1[2] + x1[3] (-> x1[2]) |
| 521 | SUB r4, r4, r8 @ r4 = s2 = x2[0] - x2[1] |
| 522 | ADD r8, r4, r8, LSL #1 @ r8 = x2[0] + x2[1] (-> x1[1]) |
| 523 | SUB r14,r14,r11 @ r14= s3 = x2[3] - x2[2] |
| 524 | ADD r11,r14,r11,LSL #1 @ r11= x2[3] + x2[2] (-> x1[3]) |
| 525 | STMIA r7,{r3,r8,r10,r11} |
| 526 | |
| 527 | @ r0 = points |
| 528 | @ r1 = x2 |
| 529 | @ r2 = s0 |
| 530 | @ r3 free |
| 531 | @ r4 = s2 |
| 532 | @ r5 = T |
| 533 | @ r6 = step |
| 534 | @ r7 = x1 |
| 535 | @ r8 free |
| 536 | @ r9 = s1 |
| 537 | @ r10 free |
| 538 | @ r11 free |
| 539 | @ r12= limit |
| 540 | @ r14= s3 |
| 541 | |
| 542 | LDRB r8, [r5,#1] @ r8 = T[1] |
| 543 | LDRB r10,[r5],-r6 @ r10= T[0] T -= step |
| 544 | MOV r2, r2, ASR #8 |
| 545 | MOV r9, r9, ASR #8 |
| 546 | MOV r4, r4, ASR #8 |
| 547 | MOV r14,r14,ASR #8 |
| 548 | |
| 549 | @ XNPROD31(s0, s1, T[0], T[1], &x2[0], &x2[2]) |
| 550 | @ x2[0] = (s0*T[0] - s1*T[1])>>31 x2[2] = (s1*T[0] + s0*T[1])>>31 |
| 551 | @ stall Xscale |
| 552 | MUL r11,r2, r8 @ r11 = s0*T[1] |
| 553 | MLA r11,r9, r10,r11 @ r11 += s1*T[0] |
| 554 | RSB r9, r9, #0 |
| 555 | MUL r2, r10,r2 @ r2 = s0*T[0] |
| 556 | MLA r2, r9, r8, r2 @ r2 += -s1*T[1] = Value for x2[0] |
| 557 | MOV r9, r11 @ r9 = r11 = Value for x2[2] |
| 558 | |
| 559 | @ XNPROD31(s3, s2, T[0], T[1], &x2[1], &x2[3]) |
| 560 | @ x2[1] = (s3*T[0] - s2*T[1])>>31 x2[3] = (s2*T[0] + s3*T[1])>>31 |
| 561 | MUL r11,r4, r10 @ r11 = s2*T[0] |
| 562 | MLA r11,r14,r8, r11 @ r11 += s3*T[1] = Value for x2[3] |
| 563 | RSB r4, r4, #0 |
| 564 | MUL r3, r14,r10 @ r3 = s3*T[0] |
| 565 | MLA r3, r4, r8, r3 @ r3 -= s2*T[1] = Value for x2[1] |
| 566 | CMP r5, r12 |
| 567 | |
| 568 | STMIA r1,{r2,r3,r9,r11} |
| 569 | |
| 570 | BGT mdct_bufferfly_generic_loop2 |
| 571 | |
| 572 | LDR r2,[r13],#4 @ unstack r2 |
| 573 | ADD r1, r1, r0, LSL #2 @ r1 = x+POINTS*j |
| 574 | @ stall Xscale |
| 575 | SUBS r2, r2, #1 @ r2-- (j++) |
| 576 | BGT mdct_butterflies_loop2 |
| 577 | |
| 578 | LDMFD r13!,{r4,r14} |
| 579 | |
| 580 | LDR r1,[r13,#4] |
| 581 | |
| 582 | SUBS r4, r4, #1 @ stages-- |
| 583 | MOV r14,r14,LSL #1 @ r14= 4<<i (i++) |
| 584 | MOV r6, r6, LSL #1 @ r6 = step <<= 1 (i++) |
| 585 | BGE mdct_butterflies_loop1 |
| 586 | LDMFD r13,{r0-r1} |
| 587 | |
| 588 | no_generics: |
| 589 | @ mdct_butterflies part2 (loop around mdct_bufferfly_32) |
| 590 | @ r0 = points |
| 591 | @ r1 = in |
| 592 | @ r2 = step |
| 593 | @ r3 = shift |
| 594 | |
| 595 | mdct_bufferflies_loop3: |
| 596 | @ mdct_bufferfly_32 |
| 597 | |
| 598 | @ block1 |
| 599 | ADD r4, r1, #16*4 @ r4 = &in[16] |
| 600 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[16] |
| 601 | @ r6 = x[17] |
| 602 | @ r9 = x[18] |
| 603 | @ r10= x[19] |
| 604 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[0] |
| 605 | @ r8 = x[1] |
| 606 | @ r11= x[2] |
| 607 | @ r12= x[3] |
| 608 | SUB r5, r5, r6 @ r5 = s0 = x[16] - x[17] |
| 609 | ADD r6, r5, r6, LSL #1 @ r6 = x[16] + x[17] -> x[16] |
| 610 | SUB r9, r9, r10 @ r9 = s1 = x[18] - x[19] |
| 611 | ADD r10,r9, r10,LSL #1 @ r10= x[18] + x[19] -> x[18] |
| 612 | SUB r8, r8, r7 @ r8 = s2 = x[ 1] - x[ 0] |
| 613 | ADD r7, r8, r7, LSL #1 @ r7 = x[ 1] + x[ 0] -> x[17] |
| 614 | SUB r12,r12,r11 @ r12= s3 = x[ 3] - x[ 2] |
| 615 | ADD r11,r12,r11, LSL #1 @ r11= x[ 3] + x[ 2] -> x[19] |
| 616 | STMIA r4!,{r6,r7,r10,r11} |
| 617 | |
| 618 | MOV r6,#0xed @ r6 =cPI1_8 |
| 619 | MOV r7,#0x62 @ r7 =cPI3_8 |
| 620 | |
| 621 | MOV r5, r5, ASR #8 |
| 622 | MOV r9, r9, ASR #8 |
| 623 | MOV r8, r8, ASR #8 |
| 624 | MOV r12,r12,ASR #8 |
| 625 | |
| 626 | @ XNPROD31( s0, s1, cPI3_8, cPI1_8, &x[ 0], &x[ 2] ) |
| 627 | @ x[0] = s0*cPI3_8 - s1*cPI1_8 x[2] = s1*cPI3_8 + s0*cPI1_8 |
| 628 | @ stall Xscale |
| 629 | MUL r11,r5, r6 @ r11 = s0*cPI1_8 |
| 630 | MLA r11,r9, r7, r11 @ r11 += s1*cPI3_8 |
| 631 | RSB r9, r9, #0 |
| 632 | MUL r5, r7, r5 @ r5 = s0*cPI3_8 |
| 633 | MLA r5, r9, r6, r5 @ r5 -= s1*cPI1_8 |
| 634 | |
| 635 | @ XPROD31 ( s2, s3, cPI1_8, cPI3_8, &x[ 1], &x[ 3] ) |
| 636 | @ x[1] = s2*cPI1_8 + s3*cPI3_8 x[3] = s3*cPI1_8 - s2*cPI3_8 |
| 637 | MUL r9, r8, r6 @ r9 = s2*cPI1_8 |
| 638 | MLA r9, r12,r7, r9 @ r9 += s3*cPI3_8 |
| 639 | RSB r8,r8,#0 |
| 640 | MUL r12,r6, r12 @ r12 = s3*cPI1_8 |
| 641 | MLA r12,r8, r7, r12 @ r12 -= s2*cPI3_8 |
| 642 | STMIA r1!,{r5,r9,r11,r12} |
| 643 | |
| 644 | @ block2 |
| 645 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[20] |
| 646 | @ r6 = x[21] |
| 647 | @ r9 = x[22] |
| 648 | @ r10= x[23] |
| 649 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[4] |
| 650 | @ r8 = x[5] |
| 651 | @ r11= x[6] |
| 652 | @ r12= x[7] |
| 653 | SUB r5, r5, r6 @ r5 = s0 = x[20] - x[21] |
| 654 | ADD r6, r5, r6, LSL #1 @ r6 = x[20] + x[21] -> x[20] |
| 655 | SUB r9, r9, r10 @ r9 = s1 = x[22] - x[23] |
| 656 | ADD r10,r9, r10,LSL #1 @ r10= x[22] + x[23] -> x[22] |
| 657 | SUB r8, r8, r7 @ r8 = s2 = x[ 5] - x[ 4] |
| 658 | ADD r7, r8, r7, LSL #1 @ r7 = x[ 5] + x[ 4] -> x[21] |
| 659 | SUB r12,r12,r11 @ r12= s3 = x[ 7] - x[ 6] |
| 660 | ADD r11,r12,r11, LSL #1 @ r11= x[ 7] + x[ 6] -> x[23] |
| 661 | MOV r14,#0xb5 @ cPI2_8 |
| 662 | STMIA r4!,{r6,r7,r10,r11} |
| 663 | |
| 664 | SUB r5, r5, r9 @ r5 = s0 - s1 |
| 665 | ADD r9, r5, r9, LSL #1 @ r9 = s0 + s1 |
| 666 | MOV r5, r5, ASR #8 |
| 667 | MUL r5, r14,r5 @ r5 = (s0-s1)*cPI2_8 |
| 668 | SUB r12,r12,r8 @ r12= s3 - s2 |
| 669 | ADD r8, r12,r8, LSL #1 @ r8 = s3 + s2 |
| 670 | |
| 671 | MOV r8, r8, ASR #8 |
| 672 | MUL r8, r14,r8 @ r8 = (s3+s2)*cPI2_8 |
| 673 | MOV r9, r9, ASR #8 |
| 674 | MUL r9, r14,r9 @ r9 = (s0+s1)*cPI2_8 |
| 675 | MOV r12,r12,ASR #8 |
| 676 | MUL r12,r14,r12 @ r12 = (s3-s2)*cPI2_8 |
| 677 | STMIA r1!,{r5,r8,r9,r12} |
| 678 | |
| 679 | @ block3 |
| 680 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[24] |
| 681 | @ r6 = x[25] |
| 682 | @ r9 = x[25] |
| 683 | @ r10= x[26] |
| 684 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[8] |
| 685 | @ r8 = x[9] |
| 686 | @ r11= x[10] |
| 687 | @ r12= x[11] |
| 688 | SUB r5, r5, r6 @ r5 = s0 = x[24] - x[25] |
| 689 | ADD r6, r5, r6, LSL #1 @ r6 = x[24] + x[25] -> x[25] |
| 690 | SUB r9, r9, r10 @ r9 = s1 = x[26] - x[27] |
| 691 | ADD r10,r9, r10,LSL #1 @ r10= x[26] + x[27] -> x[26] |
| 692 | SUB r8, r8, r7 @ r8 = s2 = x[ 9] - x[ 8] |
| 693 | ADD r7, r8, r7, LSL #1 @ r7 = x[ 9] + x[ 8] -> x[25] |
| 694 | SUB r12,r12,r11 @ r12= s3 = x[11] - x[10] |
| 695 | ADD r11,r12,r11, LSL #1 @ r11= x[11] + x[10] -> x[27] |
| 696 | STMIA r4!,{r6,r7,r10,r11} |
| 697 | |
| 698 | MOV r6,#0x62 @ r6 = cPI3_8 |
| 699 | MOV r7,#0xED @ r7 = cPI1_8 |
| 700 | |
| 701 | @ XNPROD31( s0, s1, cPI1_8, cPI3_8, &x[ 8], &x[10] ) |
| 702 | @ x[8] = s0*cPI1_8 - s1*cPI3_8 x[10] = s1*cPI1_8 + s0*cPI3_8 |
| 703 | @ stall Xscale |
| 704 | MOV r5, r5, ASR #8 |
| 705 | MUL r11,r5, r6 @ r11 = s0*cPI3_8 |
| 706 | MOV r9, r9, ASR #8 |
| 707 | MLA r11,r9, r7, r11 @ r11 += s1*cPI1_8 |
| 708 | RSB r9, r9, #0 |
| 709 | MUL r5, r7, r5 @ r5 = s0*cPI1_8 |
| 710 | MLA r5, r9, r6, r5 @ r5 -= s1*cPI3_8 |
| 711 | |
| 712 | @ XPROD31 ( s2, s3, cPI3_8, cPI1_8, &x[ 9], &x[11] ) |
| 713 | @ x[9] = s2*cPI3_8 + s3*cPI1_8 x[11] = s3*cPI3_8 - s2*cPI1_8 |
| 714 | MOV r8, r8, ASR #8 |
| 715 | MUL r9, r8, r6 @ r9 = s2*cPI3_8 |
| 716 | MOV r12,r12,ASR #8 |
| 717 | MLA r9, r12,r7, r9 @ r9 += s3*cPI1_8 |
| 718 | RSB r8,r8,#0 |
| 719 | MUL r12,r6, r12 @ r12 = s3*cPI3_8 |
| 720 | MLA r12,r8, r7, r12 @ r12 -= s2*cPI1_8 |
| 721 | STMIA r1!,{r5,r9,r11,r12} |
| 722 | |
| 723 | @ block4 |
| 724 | LDMIA r4,{r5,r6,r10,r11} @ r5 = x[28] |
| 725 | @ r6 = x[29] |
| 726 | @ r10= x[30] |
| 727 | @ r11= x[31] |
| 728 | LDMIA r1,{r8,r9,r12,r14} @ r8 = x[12] |
| 729 | @ r9 = x[13] |
| 730 | @ r12= x[14] |
| 731 | @ r14= x[15] |
| 732 | SUB r5, r5, r6 @ r5 = s0 = x[28] - x[29] |
| 733 | ADD r6, r5, r6, LSL #1 @ r6 = x[28] + x[29] -> x[28] |
| 734 | SUB r7, r14,r12 @ r7 = s3 = x[15] - x[14] |
| 735 | ADD r12,r7, r12, LSL #1 @ r12= x[15] + x[14] -> x[31] |
| 736 | SUB r10,r10,r11 @ r10= s1 = x[30] - x[31] |
| 737 | ADD r11,r10,r11,LSL #1 @ r11= x[30] + x[31] -> x[30] |
| 738 | SUB r14, r8, r9 @ r14= s2 = x[12] - x[13] |
| 739 | ADD r9, r14, r9, LSL #1 @ r9 = x[12] + x[13] -> x[29] |
| 740 | STMIA r4!,{r6,r9,r11,r12} |
| 741 | STMIA r1!,{r5,r7,r10,r14} |
| 742 | |
| 743 | @ mdct_butterfly16 (1st version) |
| 744 | @ block 1 |
| 745 | SUB r1,r1,#16*4 |
| 746 | ADD r4,r1,#8*4 |
| 747 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[ 8] |
| 748 | @ r6 = x[ 9] |
| 749 | @ r9 = x[10] |
| 750 | @ r10= x[11] |
| 751 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[0] |
| 752 | @ r8 = x[1] |
| 753 | @ r11= x[2] |
| 754 | @ r12= x[3] |
| 755 | SUB r5, r5, r6 @ r5 = s0 = x[ 8] - x[ 9] |
| 756 | ADD r6, r5, r6, LSL #1 @ r6 = x[ 8] + x[ 9] -> x[ 8] |
| 757 | SUB r9, r9, r10 @ r9 = s1 = x[10] - x[11] |
| 758 | ADD r10,r9, r10,LSL #1 @ r10= x[10] + x[11] -> x[10] |
| 759 | SUB r8, r8, r7 @ r8 = s2 = x[ 1] - x[ 0] |
| 760 | ADD r7, r8, r7, LSL #1 @ r7 = x[ 1] + x[ 0] -> x[ 9] |
| 761 | SUB r12,r12,r11 @ r12= s3 = x[ 3] - x[ 2] |
| 762 | ADD r11,r12,r11, LSL #1 @ r11= x[ 3] + x[ 2] -> x[11] |
| 763 | MOV r14,#0xB5 @ r14= cPI2_8 |
| 764 | STMIA r4!,{r6,r7,r10,r11} |
| 765 | |
| 766 | SUB r5, r5, r9 @ r5 = s0 - s1 |
| 767 | ADD r9, r5, r9, LSL #1 @ r9 = s0 + s1 |
| 768 | MOV r5, r5, ASR #8 |
| 769 | MUL r5, r14,r5 @ r5 = (s0-s1)*cPI2_8 |
| 770 | SUB r12,r12,r8 @ r12= s3 - s2 |
| 771 | ADD r8, r12,r8, LSL #1 @ r8 = s3 + s2 |
| 772 | |
| 773 | MOV r8, r8, ASR #8 |
| 774 | MUL r8, r14,r8 @ r8 = (s3+s2)*cPI2_8 |
| 775 | MOV r9, r9, ASR #8 |
| 776 | MUL r9, r14,r9 @ r9 = (s0+s1)*cPI2_8 |
| 777 | MOV r12,r12,ASR #8 |
| 778 | MUL r12,r14,r12 @ r12 = (s3-s2)*cPI2_8 |
| 779 | STMIA r1!,{r5,r8,r9,r12} |
| 780 | |
| 781 | @ block2 |
| 782 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[12] |
| 783 | @ r6 = x[13] |
| 784 | @ r9 = x[14] |
| 785 | @ r10= x[15] |
| 786 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[ 4] |
| 787 | @ r8 = x[ 5] |
| 788 | @ r11= x[ 6] |
| 789 | @ r12= x[ 7] |
| 790 | SUB r14,r7, r8 @ r14= s0 = x[ 4] - x[ 5] |
| 791 | ADD r8, r14,r8, LSL #1 @ r8 = x[ 4] + x[ 5] -> x[13] |
| 792 | SUB r7, r12,r11 @ r7 = s1 = x[ 7] - x[ 6] |
| 793 | ADD r11,r7, r11, LSL #1 @ r11= x[ 7] + x[ 6] -> x[15] |
| 794 | SUB r5, r5, r6 @ r5 = s2 = x[12] - x[13] |
| 795 | ADD r6, r5, r6, LSL #1 @ r6 = x[12] + x[13] -> x[12] |
| 796 | SUB r12,r9, r10 @ r12= s3 = x[14] - x[15] |
| 797 | ADD r10,r12,r10,LSL #1 @ r10= x[14] + x[15] -> x[14] |
| 798 | STMIA r4!,{r6,r8,r10,r11} |
| 799 | STMIA r1!,{r5,r7,r12,r14} |
| 800 | |
| 801 | @ mdct_butterfly_8 |
| 802 | LDMDB r1,{r6,r7,r8,r9,r10,r11,r12,r14} |
| 803 | @ r6 = x[0] |
| 804 | @ r7 = x[1] |
| 805 | @ r8 = x[2] |
| 806 | @ r9 = x[3] |
| 807 | @ r10= x[4] |
| 808 | @ r11= x[5] |
| 809 | @ r12= x[6] |
| 810 | @ r14= x[7] |
| 811 | ADD r6, r6, r7 @ r6 = s0 = x[0] + x[1] |
| 812 | SUB r7, r6, r7, LSL #1 @ r7 = s1 = x[0] - x[1] |
| 813 | ADD r8, r8, r9 @ r8 = s2 = x[2] + x[3] |
| 814 | SUB r9, r8, r9, LSL #1 @ r9 = s3 = x[2] - x[3] |
| 815 | ADD r10,r10,r11 @ r10= s4 = x[4] + x[5] |
| 816 | SUB r11,r10,r11,LSL #1 @ r11= s5 = x[4] - x[5] |
| 817 | ADD r12,r12,r14 @ r12= s6 = x[6] + x[7] |
| 818 | SUB r14,r12,r14,LSL #1 @ r14= s7 = x[6] - x[7] |
| 819 | |
| 820 | ADD r2, r11,r9 @ r2 = x[0] = s5 + s3 |
| 821 | SUB r4, r2, r9, LSL #1 @ r4 = x[2] = s5 - s3 |
| 822 | SUB r3, r14,r7 @ r3 = x[1] = s7 - s1 |
| 823 | ADD r5, r3, r7, LSL #1 @ r5 = x[3] = s7 + s1 |
| 824 | SUB r10,r10,r6 @ r10= x[4] = s4 - s0 |
| 825 | SUB r11,r12,r8 @ r11= x[5] = s6 - s2 |
| 826 | ADD r12,r10,r6, LSL #1 @ r12= x[6] = s4 + s0 |
| 827 | ADD r14,r11,r8, LSL #1 @ r14= x[7] = s6 + s2 |
| 828 | STMDB r1,{r2,r3,r4,r5,r10,r11,r12,r14} |
| 829 | |
| 830 | @ mdct_butterfly_8 |
| 831 | LDMIA r1,{r6,r7,r8,r9,r10,r11,r12,r14} |
| 832 | @ r6 = x[0] |
| 833 | @ r7 = x[1] |
| 834 | @ r8 = x[2] |
| 835 | @ r9 = x[3] |
| 836 | @ r10= x[4] |
| 837 | @ r11= x[5] |
| 838 | @ r12= x[6] |
| 839 | @ r14= x[7] |
| 840 | ADD r6, r6, r7 @ r6 = s0 = x[0] + x[1] |
| 841 | SUB r7, r6, r7, LSL #1 @ r7 = s1 = x[0] - x[1] |
| 842 | ADD r8, r8, r9 @ r8 = s2 = x[2] + x[3] |
| 843 | SUB r9, r8, r9, LSL #1 @ r9 = s3 = x[2] - x[3] |
| 844 | ADD r10,r10,r11 @ r10= s4 = x[4] + x[5] |
| 845 | SUB r11,r10,r11,LSL #1 @ r11= s5 = x[4] - x[5] |
| 846 | ADD r12,r12,r14 @ r12= s6 = x[6] + x[7] |
| 847 | SUB r14,r12,r14,LSL #1 @ r14= s7 = x[6] - x[7] |
| 848 | |
| 849 | ADD r2, r11,r9 @ r2 = x[0] = s5 + s3 |
| 850 | SUB r4, r2, r9, LSL #1 @ r4 = x[2] = s5 - s3 |
| 851 | SUB r3, r14,r7 @ r3 = x[1] = s7 - s1 |
| 852 | ADD r5, r3, r7, LSL #1 @ r5 = x[3] = s7 + s1 |
| 853 | SUB r10,r10,r6 @ r10= x[4] = s4 - s0 |
| 854 | SUB r11,r12,r8 @ r11= x[5] = s6 - s2 |
| 855 | ADD r12,r10,r6, LSL #1 @ r12= x[6] = s4 + s0 |
| 856 | ADD r14,r11,r8, LSL #1 @ r14= x[7] = s6 + s2 |
| 857 | STMIA r1,{r2,r3,r4,r5,r10,r11,r12,r14} |
| 858 | |
| 859 | @ mdct_butterfly16 (2nd version) |
| 860 | @ block 1 |
| 861 | ADD r1,r1,#16*4-8*4 |
| 862 | ADD r4,r1,#8*4 |
| 863 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[ 8] |
| 864 | @ r6 = x[ 9] |
| 865 | @ r9 = x[10] |
| 866 | @ r10= x[11] |
| 867 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[0] |
| 868 | @ r8 = x[1] |
| 869 | @ r11= x[2] |
| 870 | @ r12= x[3] |
| 871 | SUB r5, r5, r6 @ r5 = s0 = x[ 8] - x[ 9] |
| 872 | ADD r6, r5, r6, LSL #1 @ r6 = x[ 8] + x[ 9] -> x[ 8] |
| 873 | SUB r9, r9, r10 @ r9 = s1 = x[10] - x[11] |
| 874 | ADD r10,r9, r10,LSL #1 @ r10= x[10] + x[11] -> x[10] |
| 875 | SUB r8, r8, r7 @ r8 = s2 = x[ 1] - x[ 0] |
| 876 | ADD r7, r8, r7, LSL #1 @ r7 = x[ 1] + x[ 0] -> x[ 9] |
| 877 | SUB r12,r12,r11 @ r12= s3 = x[ 3] - x[ 2] |
| 878 | ADD r11,r12,r11, LSL #1 @ r11= x[ 3] + x[ 2] -> x[11] |
| 879 | MOV r14,#0xb5 @ r14= cPI2_8 |
| 880 | STMIA r4!,{r6,r7,r10,r11} |
| 881 | |
| 882 | SUB r5, r5, r9 @ r5 = s0 - s1 |
| 883 | ADD r9, r5, r9, LSL #1 @ r9 = s0 + s1 |
| 884 | MOV r5, r5, ASR #8 |
| 885 | MUL r5, r14,r5 @ r5 = (s0-s1)*cPI2_8 |
| 886 | SUB r12,r12,r8 @ r12= s3 - s2 |
| 887 | ADD r8, r12,r8, LSL #1 @ r8 = s3 + s2 |
| 888 | |
| 889 | MOV r8, r8, ASR #8 |
| 890 | MUL r8, r14,r8 @ r8 = (s3+s2)*cPI2_8 |
| 891 | MOV r9, r9, ASR #8 |
| 892 | MUL r9, r14,r9 @ r9 = (s0+s1)*cPI2_8 |
| 893 | MOV r12,r12,ASR #8 |
| 894 | MUL r12,r14,r12 @ r12 = (s3-s2)*cPI2_8 |
| 895 | STMIA r1!,{r5,r8,r9,r12} |
| 896 | |
| 897 | @ block2 |
| 898 | LDMIA r4,{r5,r6,r9,r10} @ r5 = x[12] |
| 899 | @ r6 = x[13] |
| 900 | @ r9 = x[14] |
| 901 | @ r10= x[15] |
| 902 | LDMIA r1,{r7,r8,r11,r12} @ r7 = x[ 4] |
| 903 | @ r8 = x[ 5] |
| 904 | @ r11= x[ 6] |
| 905 | @ r12= x[ 7] |
| 906 | SUB r5, r5, r6 @ r5 = s2 = x[12] - x[13] |
| 907 | ADD r6, r5, r6, LSL #1 @ r6 = x[12] + x[13] -> x[12] |
| 908 | SUB r9, r9, r10 @ r9 = s3 = x[14] - x[15] |
| 909 | ADD r10,r9, r10,LSL #1 @ r10= x[14] + x[15] -> x[14] |
| 910 | SUB r14,r7, r8 @ r14= s0 = x[ 4] - x[ 5] |
| 911 | ADD r8, r14,r8, LSL #1 @ r8 = x[ 4] + x[ 5] -> x[13] |
| 912 | SUB r7, r12,r11 @ r7 = s1 = x[ 7] - x[ 6] |
| 913 | ADD r11,r7, r11, LSL #1 @ r11= x[ 7] + x[ 6] -> x[15] |
| 914 | STMIA r4!,{r6,r8,r10,r11} |
| 915 | STMIA r1!,{r5,r7,r9,r14} |
| 916 | |
| 917 | @ mdct_butterfly_8 |
| 918 | LDMDB r1,{r6,r7,r8,r9,r10,r11,r12,r14} |
| 919 | @ r6 = x[0] |
| 920 | @ r7 = x[1] |
| 921 | @ r8 = x[2] |
| 922 | @ r9 = x[3] |
| 923 | @ r10= x[4] |
| 924 | @ r11= x[5] |
| 925 | @ r12= x[6] |
| 926 | @ r14= x[7] |
| 927 | ADD r6, r6, r7 @ r6 = s0 = x[0] + x[1] |
| 928 | SUB r7, r6, r7, LSL #1 @ r7 = s1 = x[0] - x[1] |
| 929 | ADD r8, r8, r9 @ r8 = s2 = x[2] + x[3] |
| 930 | SUB r9, r8, r9, LSL #1 @ r9 = s3 = x[2] - x[3] |
| 931 | ADD r10,r10,r11 @ r10= s4 = x[4] + x[5] |
| 932 | SUB r11,r10,r11,LSL #1 @ r11= s5 = x[4] - x[5] |
| 933 | ADD r12,r12,r14 @ r12= s6 = x[6] + x[7] |
| 934 | SUB r14,r12,r14,LSL #1 @ r14= s7 = x[6] - x[7] |
| 935 | |
| 936 | ADD r2, r11,r9 @ r2 = x[0] = s5 + s3 |
| 937 | SUB r4, r2, r9, LSL #1 @ r4 = x[2] = s5 - s3 |
| 938 | SUB r3, r14,r7 @ r3 = x[1] = s7 - s1 |
| 939 | ADD r5, r3, r7, LSL #1 @ r5 = x[3] = s7 + s1 |
| 940 | SUB r10,r10,r6 @ r10= x[4] = s4 - s0 |
| 941 | SUB r11,r12,r8 @ r11= x[5] = s6 - s2 |
| 942 | ADD r12,r10,r6, LSL #1 @ r12= x[6] = s4 + s0 |
| 943 | ADD r14,r11,r8, LSL #1 @ r14= x[7] = s6 + s2 |
| 944 | STMDB r1,{r2,r3,r4,r5,r10,r11,r12,r14} |
| 945 | |
| 946 | @ mdct_butterfly_8 |
| 947 | LDMIA r1,{r6,r7,r8,r9,r10,r11,r12,r14} |
| 948 | @ r6 = x[0] |
| 949 | @ r7 = x[1] |
| 950 | @ r8 = x[2] |
| 951 | @ r9 = x[3] |
| 952 | @ r10= x[4] |
| 953 | @ r11= x[5] |
| 954 | @ r12= x[6] |
| 955 | @ r14= x[7] |
| 956 | ADD r6, r6, r7 @ r6 = s0 = x[0] + x[1] |
| 957 | SUB r7, r6, r7, LSL #1 @ r7 = s1 = x[0] - x[1] |
| 958 | ADD r8, r8, r9 @ r8 = s2 = x[2] + x[3] |
| 959 | SUB r9, r8, r9, LSL #1 @ r9 = s3 = x[2] - x[3] |
| 960 | ADD r10,r10,r11 @ r10= s4 = x[4] + x[5] |
| 961 | SUB r11,r10,r11,LSL #1 @ r11= s5 = x[4] - x[5] |
| 962 | ADD r12,r12,r14 @ r12= s6 = x[6] + x[7] |
| 963 | SUB r14,r12,r14,LSL #1 @ r14= s7 = x[6] - x[7] |
| 964 | |
| 965 | ADD r2, r11,r9 @ r2 = x[0] = s5 + s3 |
| 966 | SUB r4, r2, r9, LSL #1 @ r4 = x[2] = s5 - s3 |
| 967 | SUB r3, r14,r7 @ r3 = x[1] = s7 - s1 |
| 968 | ADD r5, r3, r7, LSL #1 @ r5 = x[3] = s7 + s1 |
| 969 | SUB r10,r10,r6 @ r10= x[4] = s4 - s0 |
| 970 | SUB r11,r12,r8 @ r11= x[5] = s6 - s2 |
| 971 | ADD r12,r10,r6, LSL #1 @ r12= x[6] = s4 + s0 |
| 972 | ADD r14,r11,r8, LSL #1 @ r14= x[7] = s6 + s2 |
| 973 | STMIA r1,{r2,r3,r4,r5,r10,r11,r12,r14} |
| 974 | |
| 975 | ADD r1,r1,#8*4 |
| 976 | SUBS r0,r0,#64 |
| 977 | BGT mdct_bufferflies_loop3 |
| 978 | |
| 979 | LDMFD r13,{r0-r3} |
| 980 | |
| 981 | mdct_bitreverseARM: |
| 982 | @ r0 = points |
| 983 | @ r1 = in |
| 984 | @ r2 = step |
| 985 | @ r3 = shift |
| 986 | |
| 987 | MOV r4, #0 @ r4 = bit = 0 |
| 988 | ADD r5, r1, r0, LSL #1 @ r5 = w = x + (n>>1) |
| 989 | ADR r6, bitrev |
| 990 | SUB r3, r3, #2 @ r3 = shift -= 2 |
| 991 | SUB r5, r5, #8 |
| 992 | brev_lp: |
| 993 | LDRB r7, [r6, r4, LSR #6] |
| 994 | AND r8, r4, #0x3f |
| 995 | LDRB r8, [r6, r8] |
| 996 | ADD r4, r4, #1 @ bit++ |
| 997 | @ stall XScale |
| 998 | ORR r7, r7, r8, LSL #6 @ r7 = bitrev[bit] |
| 999 | ADD r9, r1, r7, LSR r3 @ r9 = xx = x + (b>>shift) |
| 1000 | CMP r5, r9 @ if (w > xx) |
| 1001 | LDR r10,[r5],#-8 @ r10 = w[0] w -= 2 |
| 1002 | LDRGT r11,[r5,#12] @ r11 = w[1] |
| 1003 | LDRGT r12,[r9] @ r12 = xx[0] |
| 1004 | LDRGT r14,[r9,#4] @ r14 = xx[1] |
| 1005 | STRGT r10,[r9] @ xx[0]= w[0] |
| 1006 | STRGT r11,[r9,#4] @ xx[1]= w[1] |
| 1007 | STRGT r12,[r5,#8] @ w[0] = xx[0] |
| 1008 | STRGT r14,[r5,#12] @ w[1] = xx[1] |
| 1009 | CMP r5,r1 |
| 1010 | BGT brev_lp |
| 1011 | |
| 1012 | @ mdct_step7 |
| 1013 | @ r0 = points |
| 1014 | @ r1 = in |
| 1015 | @ r2 = step |
| 1016 | @ r3 = shift-2 |
| 1017 | |
| 1018 | CMP r2, #4 @ r5 = T = (step>=4) ? |
| 1019 | LDRGE r5, =sincos_lookup0 @ sincos_lookup0 + |
| 1020 | LDRLT r5, =sincos_lookup1 @ sincos_lookup0 + |
| 1021 | ADD r7, r1, r0, LSL #1 @ r7 = w1 = x + (n>>1) |
| 1022 | ADDGE r5, r5, r2, LSR #1 @ (step>>1) |
| 1023 | ADD r8, r5, #1024 @ r8 = Ttop |
| 1024 | step7_loop1: |
| 1025 | LDR r6, [r1] @ r6 = w0[0] |
| 1026 | LDR r9, [r1,#4] @ r9 = w0[1] |
| 1027 | LDR r10,[r7,#-8]! @ r10= w1[0] w1 -= 2 |
| 1028 | LDR r11,[r7,#4] @ r11= w1[1] |
| 1029 | LDRB r14,[r5,#1] @ r14= T[1] |
| 1030 | LDRB r12,[r5],r2 @ r12= T[0] T += step |
| 1031 | |
| 1032 | ADD r6, r6, r10 @ r6 = s0 = w0[0] + w1[0] |
| 1033 | SUB r10,r6, r10,LSL #1 @ r10= s1b= w0[0] - w1[0] |
| 1034 | SUB r11,r11,r9 @ r11= s1 = w1[1] - w0[1] |
| 1035 | ADD r9, r11,r9, LSL #1 @ r9 = s0b= w1[1] + w0[1] |
| 1036 | |
| 1037 | MOV r6, r6, ASR #9 |
| 1038 | MUL r3, r6, r14 @ r3 = s0*T[1] |
| 1039 | MOV r11,r11,ASR #9 |
| 1040 | MUL r4, r11,r12 @ r4 += s1*T[0] = s2 |
| 1041 | ADD r3, r3, r4 |
| 1042 | MUL r14,r11,r14 @ r14 = s1*T[1] |
| 1043 | MUL r12,r6, r12 @ r12 += s0*T[0] = s3 |
| 1044 | SUB r14,r14,r12 |
| 1045 | |
| 1046 | @ r9 = s0b<<1 |
| 1047 | @ r10= s1b<<1 |
| 1048 | ADD r9, r3, r9, ASR #1 @ r9 = s0b + s2 |
| 1049 | SUB r3, r9, r3, LSL #1 @ r3 = s0b - s2 |
| 1050 | |
| 1051 | SUB r12,r14,r10,ASR #1 @ r12= s3 - s1b |
| 1052 | ADD r10,r14,r10,ASR #1 @ r10= s3 + s1b |
| 1053 | STR r9, [r1],#4 |
| 1054 | STR r10,[r1],#4 @ w0 += 2 |
| 1055 | STR r3, [r7] |
| 1056 | STR r12,[r7,#4] |
| 1057 | |
| 1058 | CMP r5,r8 |
| 1059 | BLT step7_loop1 |
| 1060 | |
| 1061 | step7_loop2: |
| 1062 | LDR r6, [r1] @ r6 = w0[0] |
| 1063 | LDR r9, [r1,#4] @ r9 = w0[1] |
| 1064 | LDR r10,[r7,#-8]! @ r10= w1[0] w1 -= 2 |
| 1065 | LDR r11,[r7,#4] @ r11= w1[1] |
| 1066 | LDRB r14,[r5,-r2]! @ r12= T[1] T -= step |
| 1067 | LDRB r12,[r5,#1] @ r14= T[0] |
| 1068 | |
| 1069 | ADD r6, r6, r10 @ r6 = s0 = w0[0] + w1[0] |
| 1070 | SUB r10,r6, r10,LSL #1 @ r10= s1b= w0[0] - w1[0] |
| 1071 | SUB r11,r11,r9 @ r11= s1 = w1[1] - w0[1] |
| 1072 | ADD r9, r11,r9, LSL #1 @ r9 = s0b= w1[1] + w0[1] |
| 1073 | |
| 1074 | MOV r6, r6, ASR #9 |
| 1075 | MUL r3, r6, r14 @ r3 = s0*T[0] |
| 1076 | MOV r11,r11,ASR #9 |
| 1077 | MUL r4, r11,r12 @ r4 += s1*T[1] = s2 |
| 1078 | ADD r3, r3, r4 |
| 1079 | MUL r14,r11,r14 @ r14 = s1*T[0] |
| 1080 | MUL r12,r6, r12 @ r12 += s0*T[1] = s3 |
| 1081 | SUB r14,r14,r12 |
| 1082 | |
| 1083 | @ r9 = s0b<<1 |
| 1084 | @ r10= s1b<<1 |
| 1085 | ADD r9, r3, r9, ASR #1 @ r9 = s0b + s2 |
| 1086 | SUB r3, r9, r3, LSL #1 @ r3 = s0b - s2 |
| 1087 | |
| 1088 | SUB r12,r14,r10,ASR #1 @ r12= s3 - s1b |
| 1089 | ADD r10,r14,r10,ASR #1 @ r10= s3 + s1b |
| 1090 | STR r9, [r1],#4 |
| 1091 | STR r10,[r1],#4 @ w0 += 2 |
| 1092 | STR r3, [r7] |
| 1093 | STR r12,[r7,#4] |
| 1094 | |
| 1095 | CMP r1,r7 |
| 1096 | BLT step7_loop2 |
| 1097 | |
| 1098 | LDMFD r13!,{r0-r3} |
| 1099 | |
| 1100 | @ r0 = points |
| 1101 | @ r1 = in |
| 1102 | @ r2 = step |
| 1103 | @ r3 = shift |
| 1104 | MOV r2, r2, ASR #2 @ r2 = step >>= 2 |
| 1105 | CMP r2, #0 |
| 1106 | CMPNE r2, #1 |
| 1107 | BEQ mdct_end |
| 1108 | |
| 1109 | @ step > 1 (default case) |
| 1110 | CMP r2, #4 @ r5 = T = (step>=4) ? |
| 1111 | LDRGE r5, =sincos_lookup0 @ sincos_lookup0 + |
| 1112 | LDRLT r5, =sincos_lookup1 @ sincos_lookup1 |
| 1113 | ADD r7, r1, r0, LSL #1 @ r7 = iX = x + (n>>1) |
| 1114 | ADDGE r5, r5, r2, LSR #1 @ (step>>1) |
| 1115 | mdct_step8_default: |
| 1116 | LDR r6, [r1],#4 @ r6 = s0 = x[0] |
| 1117 | LDR r8, [r1],#4 @ r8 = -s1 = x[1] |
| 1118 | LDRB r12,[r5,#1] @ r12= T[1] |
| 1119 | LDRB r14,[r5],r2 @ r14= T[0] T += step |
| 1120 | RSB r8, r8, #0 @ r8 = s1 |
| 1121 | |
| 1122 | @ XPROD31(s0, s1, T[0], T[1], x, x+1) |
| 1123 | @ x[0] = s0 * T[0] + s1 * T[1] x[1] = s1 * T[0] - s0 * T[1] |
| 1124 | MOV r6, r6, ASR #8 |
| 1125 | MOV r8, r8, ASR #8 |
| 1126 | MUL r10,r8, r12 @ r10 = s1 * T[1] |
| 1127 | CMP r1, r7 |
| 1128 | MLA r10,r6, r14,r10 @ r10 += s0 * T[0] |
| 1129 | RSB r6, r6, #0 @ r6 = -s0 |
| 1130 | MUL r11,r8, r14 @ r11 = s1 * T[0] |
| 1131 | MLA r11,r6, r12,r11 @ r11 -= s0 * T[1] |
| 1132 | STR r10,[r1,#-8] |
| 1133 | STR r11,[r1,#-4] |
| 1134 | BLT mdct_step8_default |
| 1135 | |
| 1136 | mdct_end: |
| 1137 | MOV r0, r2 |
| 1138 | LDMFD r13!,{r4-r11,PC} |
| 1139 | |
| 1140 | bitrev: |
| 1141 | .byte 0 |
| 1142 | .byte 32 |
| 1143 | .byte 16 |
| 1144 | .byte 48 |
| 1145 | .byte 8 |
| 1146 | .byte 40 |
| 1147 | .byte 24 |
| 1148 | .byte 56 |
| 1149 | .byte 4 |
| 1150 | .byte 36 |
| 1151 | .byte 20 |
| 1152 | .byte 52 |
| 1153 | .byte 12 |
| 1154 | .byte 44 |
| 1155 | .byte 28 |
| 1156 | .byte 60 |
| 1157 | .byte 2 |
| 1158 | .byte 34 |
| 1159 | .byte 18 |
| 1160 | .byte 50 |
| 1161 | .byte 10 |
| 1162 | .byte 42 |
| 1163 | .byte 26 |
| 1164 | .byte 58 |
| 1165 | .byte 6 |
| 1166 | .byte 38 |
| 1167 | .byte 22 |
| 1168 | .byte 54 |
| 1169 | .byte 14 |
| 1170 | .byte 46 |
| 1171 | .byte 30 |
| 1172 | .byte 62 |
| 1173 | .byte 1 |
| 1174 | .byte 33 |
| 1175 | .byte 17 |
| 1176 | .byte 49 |
| 1177 | .byte 9 |
| 1178 | .byte 41 |
| 1179 | .byte 25 |
| 1180 | .byte 57 |
| 1181 | .byte 5 |
| 1182 | .byte 37 |
| 1183 | .byte 21 |
| 1184 | .byte 53 |
| 1185 | .byte 13 |
| 1186 | .byte 45 |
| 1187 | .byte 29 |
| 1188 | .byte 61 |
| 1189 | .byte 3 |
| 1190 | .byte 35 |
| 1191 | .byte 19 |
| 1192 | .byte 51 |
| 1193 | .byte 11 |
| 1194 | .byte 43 |
| 1195 | .byte 27 |
| 1196 | .byte 59 |
| 1197 | .byte 7 |
| 1198 | .byte 39 |
| 1199 | .byte 23 |
| 1200 | .byte 55 |
| 1201 | .byte 15 |
| 1202 | .byte 47 |
| 1203 | .byte 31 |
| 1204 | .byte 63 |
| 1205 | |
| 1206 | @ END |