resample_neon.c (10413B)
1 /* Copyright (C) 2007-2008 Jean-Marc Valin 2 * Copyright (C) 2008 Thorvald Natvig 3 * Copyright (C) 2011 Texas Instruments 4 * author Jyri Sarha 5 */ 6 /** 7 @file resample_neon.h 8 @brief Resampler functions (NEON version) 9 */ 10 /* 11 Redistribution and use in source and binary forms, with or without 12 modification, are permitted provided that the following conditions 13 are met: 14 15 - Redistributions of source code must retain the above copyright 16 notice, this list of conditions and the following disclaimer. 17 18 - Redistributions in binary form must reproduce the above copyright 19 notice, this list of conditions and the following disclaimer in the 20 documentation and/or other materials provided with the distribution. 21 22 - Neither the name of the Xiph.org Foundation nor the names of its 23 contributors may be used to endorse or promote products derived from 24 this software without specific prior written permission. 25 26 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 27 ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 28 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 29 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 30 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 31 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 32 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 33 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 34 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 35 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 36 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <stdint.h> 40 #include "simd_detect.h" 41 42 #ifdef FIXED_POINT 43 #if defined(__aarch64__) 44 static inline int32_t saturate_32bit_to_16bit(int32_t a) { 45 int32_t ret; 46 asm ("fmov s0, %w[a]\n" 47 "sqxtn h0, s0\n" 48 "sxtl v0.4s, v0.4h\n" 49 "fmov %w[ret], s0\n" 50 : [ret] "=r" (ret) 51 : [a] "r" (a) 52 : "v0" ); 53 return ret; 54 } 55 #elif defined(__thumb2__) 56 static inline int32_t saturate_32bit_to_16bit(int32_t a) { 57 int32_t ret; 58 asm ("ssat %[ret], #16, %[a]" 59 : [ret] "=r" (ret) 60 : [a] "r" (a) 61 : ); 62 return ret; 63 } 64 #else 65 static inline int32_t saturate_32bit_to_16bit(int32_t a) { 66 int32_t ret; 67 asm ("vmov.s32 d0[0], %[a]\n" 68 "vqmovn.s32 d0, q0\n" 69 "vmov.s16 %[ret], d0[0]\n" 70 : [ret] "=r" (ret) 71 : [a] "r" (a) 72 : "q0"); 73 return ret; 74 } 75 #endif 76 #undef WORD2INT 77 #define WORD2INT(x) (saturate_32bit_to_16bit(x)) 78 79 #define OVERRIDE_INNER_PRODUCT_SINGLE 80 /* Only works when len % 4 == 0 and len >= 4 */ 81 #if defined(__aarch64__) 82 inline int32_t inner_product_single(const int16_t *a, const int16_t *b, unsigned int len) 83 { 84 int32_t ret; 85 uint32_t remainder = len % 16; 86 len = len - remainder; 87 88 asm volatile (" cmp %w[len], #0\n" 89 " b.ne 1f\n" 90 " ld1 {v16.4h}, [%[b]], #8\n" 91 " ld1 {v20.4h}, [%[a]], #8\n" 92 " subs %w[remainder], %w[remainder], #4\n" 93 " smull v0.4s, v16.4h, v20.4h\n" 94 " b.ne 4f\n" 95 " b 5f\n" 96 "1:" 97 " ld1 {v16.4h, v17.4h, v18.4h, v19.4h}, [%[b]], #32\n" 98 " ld1 {v20.4h, v21.4h, v22.4h, v23.4h}, [%[a]], #32\n" 99 " subs %w[len], %w[len], #16\n" 100 " smull v0.4s, v16.4h, v20.4h\n" 101 " smlal v0.4s, v17.4h, v21.4h\n" 102 " smlal v0.4s, v18.4h, v22.4h\n" 103 " smlal v0.4s, v19.4h, v23.4h\n" 104 " b.eq 3f\n" 105 "2:" 106 " ld1 {v16.4h, v17.4h, v18.4h, v19.4h}, [%[b]], #32\n" 107 " ld1 {v20.4h, v21.4h, v22.4h, v23.4h}, [%[a]], #32\n" 108 " subs %w[len], %w[len], #16\n" 109 " smlal v0.4s, v16.4h, v20.4h\n" 110 " smlal v0.4s, v17.4h, v21.4h\n" 111 " smlal v0.4s, v18.4h, v22.4h\n" 112 " smlal v0.4s, v19.4h, v23.4h\n" 113 " b.ne 2b\n" 114 "3:" 115 " cmp %w[remainder], #0\n" 116 " b.eq 5f\n" 117 "4:" 118 " ld1 {v18.4h}, [%[b]], #8\n" 119 " ld1 {v22.4h}, [%[a]], #8\n" 120 " subs %w[remainder], %w[remainder], #4\n" 121 " smlal v0.4s, v18.4h, v22.4h\n" 122 " b.ne 4b\n" 123 "5:" 124 " saddlv d0, v0.4s\n" 125 " sqxtn s0, d0\n" 126 " sqrshrn h0, s0, #15\n" 127 " sxtl v0.4s, v0.4h\n" 128 " fmov %w[ret], s0\n" 129 : [ret] "=r" (ret), [a] "+r" (a), [b] "+r" (b), 130 [len] "+r" (len), [remainder] "+r" (remainder) 131 : 132 : "cc", "v0", 133 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23"); 134 return ret; 135 } 136 #else 137 inline int32_t inner_product_single(const int16_t *a, const int16_t *b, unsigned int len) 138 { 139 int32_t ret; 140 uint32_t remainder = len % 16; 141 len = len - remainder; 142 143 asm volatile (" cmp %[len], #0\n" 144 " bne 1f\n" 145 " vld1.16 {d16}, [%[b]]!\n" 146 " vld1.16 {d20}, [%[a]]!\n" 147 " subs %[remainder], %[remainder], #4\n" 148 " vmull.s16 q0, d16, d20\n" 149 " beq 5f\n" 150 " b 4f\n" 151 "1:" 152 " vld1.16 {d16, d17, d18, d19}, [%[b]]!\n" 153 " vld1.16 {d20, d21, d22, d23}, [%[a]]!\n" 154 " subs %[len], %[len], #16\n" 155 " vmull.s16 q0, d16, d20\n" 156 " vmlal.s16 q0, d17, d21\n" 157 " vmlal.s16 q0, d18, d22\n" 158 " vmlal.s16 q0, d19, d23\n" 159 " beq 3f\n" 160 "2:" 161 " vld1.16 {d16, d17, d18, d19}, [%[b]]!\n" 162 " vld1.16 {d20, d21, d22, d23}, [%[a]]!\n" 163 " subs %[len], %[len], #16\n" 164 " vmlal.s16 q0, d16, d20\n" 165 " vmlal.s16 q0, d17, d21\n" 166 " vmlal.s16 q0, d18, d22\n" 167 " vmlal.s16 q0, d19, d23\n" 168 " bne 2b\n" 169 "3:" 170 " cmp %[remainder], #0\n" 171 " beq 5f\n" 172 "4:" 173 " vld1.16 {d16}, [%[b]]!\n" 174 " vld1.16 {d20}, [%[a]]!\n" 175 " subs %[remainder], %[remainder], #4\n" 176 " vmlal.s16 q0, d16, d20\n" 177 " bne 4b\n" 178 "5:" 179 " vaddl.s32 q0, d0, d1\n" 180 " vadd.s64 d0, d0, d1\n" 181 " vqmovn.s64 d0, q0\n" 182 " vqrshrn.s32 d0, q0, #15\n" 183 " vmov.s16 %[ret], d0[0]\n" 184 : [ret] "=r" (ret), [a] "+r" (a), [b] "+r" (b), 185 [len] "+r" (len), [remainder] "+r" (remainder) 186 : 187 : "cc", "q0", 188 "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23"); 189 190 return ret; 191 } 192 #endif // !defined(__aarch64__) 193 194 #elif defined(FLOATING_POINT) 195 #if defined(__aarch64__) 196 static inline int32_t saturate_float_to_16bit(float a) { 197 int32_t ret; 198 asm ("fcvtas s1, %s[a]\n" 199 "sqxtn h1, s1\n" 200 "sxtl v1.4s, v1.4h\n" 201 "fmov %w[ret], s1\n" 202 : [ret] "=r" (ret) 203 : [a] "w" (a) 204 : "v1"); 205 return ret; 206 } 207 #else 208 static inline int32_t saturate_float_to_16bit(float a) { 209 int32_t ret; 210 asm ("vmov.f32 d0[0], %[a]\n" 211 "vcvt.s32.f32 d0, d0, #15\n" 212 "vqrshrn.s32 d0, q0, #15\n" 213 "vmov.s16 %[ret], d0[0]\n" 214 : [ret] "=r" (ret) 215 : [a] "r" (a) 216 : "q0"); 217 return ret; 218 } 219 #endif 220 221 #undef WORD2INT 222 #define WORD2INT(x) (saturate_float_to_16bit(x)) 223 224 #define OVERRIDE_INNER_PRODUCT_SINGLE 225 /* Only works when len % 4 == 0 and len >= 4 */ 226 #if defined(__aarch64__) 227 inline float inner_product_single(const float *a, const float *b, unsigned int len) 228 { 229 float ret; 230 uint32_t remainder = len % 16; 231 len = len - remainder; 232 233 asm volatile (" cmp %w[len], #0\n" 234 " b.ne 1f\n" 235 " ld1 {v16.4s}, [%[b]], #16\n" 236 " ld1 {v20.4s}, [%[a]], #16\n" 237 " subs %w[remainder], %w[remainder], #4\n" 238 " fmul v1.4s, v16.4s, v20.4s\n" 239 " b.ne 4f\n" 240 " b 5f\n" 241 "1:" 242 " ld1 {v16.4s, v17.4s, v18.4s, v19.4s}, [%[b]], #64\n" 243 " ld1 {v20.4s, v21.4s, v22.4s, v23.4s}, [%[a]], #64\n" 244 " subs %w[len], %w[len], #16\n" 245 " fmul v1.4s, v16.4s, v20.4s\n" 246 " fmul v2.4s, v17.4s, v21.4s\n" 247 " fmul v3.4s, v18.4s, v22.4s\n" 248 " fmul v4.4s, v19.4s, v23.4s\n" 249 " b.eq 3f\n" 250 "2:" 251 " ld1 {v16.4s, v17.4s, v18.4s, v19.4s}, [%[b]], #64\n" 252 " ld1 {v20.4s, v21.4s, v22.4s, v23.4s}, [%[a]], #64\n" 253 " subs %w[len], %w[len], #16\n" 254 " fmla v1.4s, v16.4s, v20.4s\n" 255 " fmla v2.4s, v17.4s, v21.4s\n" 256 " fmla v3.4s, v18.4s, v22.4s\n" 257 " fmla v4.4s, v19.4s, v23.4s\n" 258 " b.ne 2b\n" 259 "3:" 260 " fadd v16.4s, v1.4s, v2.4s\n" 261 " fadd v17.4s, v3.4s, v4.4s\n" 262 " cmp %w[remainder], #0\n" 263 " fadd v1.4s, v16.4s, v17.4s\n" 264 " b.eq 5f\n" 265 "4:" 266 " ld1 {v18.4s}, [%[b]], #16\n" 267 " ld1 {v22.4s}, [%[a]], #16\n" 268 " subs %w[remainder], %w[remainder], #4\n" 269 " fmla v1.4s, v18.4s, v22.4s\n" 270 " b.ne 4b\n" 271 "5:" 272 " faddp v1.4s, v1.4s, v1.4s\n" 273 " faddp %[ret].4s, v1.4s, v1.4s\n" 274 : [ret] "=w" (ret), [a] "+r" (a), [b] "+r" (b), 275 [len] "+r" (len), [remainder] "+r" (remainder) 276 : 277 : "cc", "v1", "v2", "v3", "v4", 278 "v16", "v17", "v18", "v19", "v20", "v21", "v22", "v23"); 279 return ret; 280 } 281 #else 282 inline float inner_product_single(const float *a, const float *b, unsigned int len) 283 { 284 float ret; 285 uint32_t remainder = len % 16; 286 len = len - remainder; 287 288 asm volatile (" cmp %[len], #0\n" 289 " bne 1f\n" 290 " vld1.32 {q4}, [%[b]]!\n" 291 " vld1.32 {q8}, [%[a]]!\n" 292 " subs %[remainder], %[remainder], #4\n" 293 " vmul.f32 q0, q4, q8\n" 294 " bne 4f\n" 295 " b 5f\n" 296 "1:" 297 " vld1.32 {q4, q5}, [%[b]]!\n" 298 " vld1.32 {q8, q9}, [%[a]]!\n" 299 " vld1.32 {q6, q7}, [%[b]]!\n" 300 " vld1.32 {q10, q11}, [%[a]]!\n" 301 " subs %[len], %[len], #16\n" 302 " vmul.f32 q0, q4, q8\n" 303 " vmul.f32 q1, q5, q9\n" 304 " vmul.f32 q2, q6, q10\n" 305 " vmul.f32 q3, q7, q11\n" 306 " beq 3f\n" 307 "2:" 308 " vld1.32 {q4, q5}, [%[b]]!\n" 309 " vld1.32 {q8, q9}, [%[a]]!\n" 310 " vld1.32 {q6, q7}, [%[b]]!\n" 311 " vld1.32 {q10, q11}, [%[a]]!\n" 312 " subs %[len], %[len], #16\n" 313 " vmla.f32 q0, q4, q8\n" 314 " vmla.f32 q1, q5, q9\n" 315 " vmla.f32 q2, q6, q10\n" 316 " vmla.f32 q3, q7, q11\n" 317 " bne 2b\n" 318 "3:" 319 " vadd.f32 q4, q0, q1\n" 320 " vadd.f32 q5, q2, q3\n" 321 " cmp %[remainder], #0\n" 322 " vadd.f32 q0, q4, q5\n" 323 " beq 5f\n" 324 "4:" 325 " vld1.32 {q6}, [%[b]]!\n" 326 " vld1.32 {q10}, [%[a]]!\n" 327 " subs %[remainder], %[remainder], #4\n" 328 " vmla.f32 q0, q6, q10\n" 329 " bne 4b\n" 330 "5:" 331 " vadd.f32 d0, d0, d1\n" 332 " vpadd.f32 d0, d0, d0\n" 333 " vmov.f32 %[ret], d0[0]\n" 334 : [ret] "=r" (ret), [a] "+r" (a), [b] "+r" (b), 335 [len] "+l" (len), [remainder] "+l" (remainder) 336 : 337 : "cc", "q0", "q1", "q2", "q3", 338 "q4", "q5", "q6", "q7", "q8", "q9", "q10", "q11"); 339 return ret; 340 } 341 #endif // defined(__aarch64__) 342 #endif