resample_neon.h (6211B)
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 <arm_neon.h> 40 41 #ifdef FIXED_POINT 42 #ifdef __thumb2__ 43 static inline int32_t saturate_32bit_to_16bit(int32_t a) { 44 int32_t ret; 45 asm ("ssat %[ret], #16, %[a]" 46 : [ret] "=&r" (ret) 47 : [a] "r" (a) 48 : ); 49 return ret; 50 } 51 #else 52 static inline int32_t saturate_32bit_to_16bit(int32_t a) { 53 int32_t ret; 54 asm ("vmov.s32 d0[0], %[a]\n" 55 "vqmovn.s32 d0, q0\n" 56 "vmov.s16 %[ret], d0[0]\n" 57 : [ret] "=&r" (ret) 58 : [a] "r" (a) 59 : "q0"); 60 return ret; 61 } 62 #endif 63 #undef WORD2INT 64 #define WORD2INT(x) (saturate_32bit_to_16bit(x)) 65 66 #define OVERRIDE_INNER_PRODUCT_SINGLE 67 /* Only works when len % 4 == 0 */ 68 static inline int32_t inner_product_single(const int16_t *a, const int16_t *b, unsigned int len) 69 { 70 int32_t ret; 71 uint32_t remainder = len % 16; 72 len = len - remainder; 73 74 asm volatile (" cmp %[len], #0\n" 75 " bne 1f\n" 76 " vld1.16 {d16}, [%[b]]!\n" 77 " vld1.16 {d20}, [%[a]]!\n" 78 " subs %[remainder], %[remainder], #4\n" 79 " vmull.s16 q0, d16, d20\n" 80 " beq 5f\n" 81 " b 4f\n" 82 "1:" 83 " vld1.16 {d16, d17, d18, d19}, [%[b]]!\n" 84 " vld1.16 {d20, d21, d22, d23}, [%[a]]!\n" 85 " subs %[len], %[len], #16\n" 86 " vmull.s16 q0, d16, d20\n" 87 " vmlal.s16 q0, d17, d21\n" 88 " vmlal.s16 q0, d18, d22\n" 89 " vmlal.s16 q0, d19, d23\n" 90 " beq 3f\n" 91 "2:" 92 " vld1.16 {d16, d17, d18, d19}, [%[b]]!\n" 93 " vld1.16 {d20, d21, d22, d23}, [%[a]]!\n" 94 " subs %[len], %[len], #16\n" 95 " vmlal.s16 q0, d16, d20\n" 96 " vmlal.s16 q0, d17, d21\n" 97 " vmlal.s16 q0, d18, d22\n" 98 " vmlal.s16 q0, d19, d23\n" 99 " bne 2b\n" 100 "3:" 101 " cmp %[remainder], #0\n" 102 " beq 5f\n" 103 "4:" 104 " vld1.16 {d16}, [%[b]]!\n" 105 " vld1.16 {d20}, [%[a]]!\n" 106 " subs %[remainder], %[remainder], #4\n" 107 " vmlal.s16 q0, d16, d20\n" 108 " bne 4b\n" 109 "5:" 110 " vaddl.s32 q0, d0, d1\n" 111 " vadd.s64 d0, d0, d1\n" 112 " vqmovn.s64 d0, q0\n" 113 " vqrshrn.s32 d0, q0, #15\n" 114 " vmov.s16 %[ret], d0[0]\n" 115 : [ret] "=&r" (ret), [a] "+r" (a), [b] "+r" (b), 116 [len] "+r" (len), [remainder] "+r" (remainder) 117 : 118 : "cc", "q0", 119 "d16", "d17", "d18", "d19", 120 "d20", "d21", "d22", "d23"); 121 122 return ret; 123 } 124 #elif defined(FLOATING_POINT) 125 126 static inline int32_t saturate_float_to_16bit(float a) { 127 int32_t ret; 128 asm ("vmov.f32 d0[0], %[a]\n" 129 "vcvt.s32.f32 d0, d0, #15\n" 130 "vqrshrn.s32 d0, q0, #15\n" 131 "vmov.s16 %[ret], d0[0]\n" 132 : [ret] "=&r" (ret) 133 : [a] "r" (a) 134 : "q0"); 135 return ret; 136 } 137 #undef WORD2INT 138 #define WORD2INT(x) (saturate_float_to_16bit(x)) 139 140 #define OVERRIDE_INNER_PRODUCT_SINGLE 141 /* Only works when len % 4 == 0 */ 142 static inline float inner_product_single(const float *a, const float *b, unsigned int len) 143 { 144 float ret; 145 uint32_t remainder = len % 16; 146 len = len - remainder; 147 148 asm volatile (" cmp %[len], #0\n" 149 " bne 1f\n" 150 " vld1.32 {q4}, [%[b]]!\n" 151 " vld1.32 {q8}, [%[a]]!\n" 152 " subs %[remainder], %[remainder], #4\n" 153 " vmul.f32 q0, q4, q8\n" 154 " bne 4f\n" 155 " b 5f\n" 156 "1:" 157 " vld1.32 {q4, q5}, [%[b]]!\n" 158 " vld1.32 {q8, q9}, [%[a]]!\n" 159 " vld1.32 {q6, q7}, [%[b]]!\n" 160 " vld1.32 {q10, q11}, [%[a]]!\n" 161 " subs %[len], %[len], #16\n" 162 " vmul.f32 q0, q4, q8\n" 163 " vmul.f32 q1, q5, q9\n" 164 " vmul.f32 q2, q6, q10\n" 165 " vmul.f32 q3, q7, q11\n" 166 " beq 3f\n" 167 "2:" 168 " vld1.32 {q4, q5}, [%[b]]!\n" 169 " vld1.32 {q8, q9}, [%[a]]!\n" 170 " vld1.32 {q6, q7}, [%[b]]!\n" 171 " vld1.32 {q10, q11}, [%[a]]!\n" 172 " subs %[len], %[len], #16\n" 173 " vmla.f32 q0, q4, q8\n" 174 " vmla.f32 q1, q5, q9\n" 175 " vmla.f32 q2, q6, q10\n" 176 " vmla.f32 q3, q7, q11\n" 177 " bne 2b\n" 178 "3:" 179 " vadd.f32 q4, q0, q1\n" 180 " vadd.f32 q5, q2, q3\n" 181 " cmp %[remainder], #0\n" 182 " vadd.f32 q0, q4, q5\n" 183 " beq 5f\n" 184 "4:" 185 " vld1.32 {q6}, [%[b]]!\n" 186 " vld1.32 {q10}, [%[a]]!\n" 187 " subs %[remainder], %[remainder], #4\n" 188 " vmla.f32 q0, q6, q10\n" 189 " bne 4b\n" 190 "5:" 191 " vadd.f32 d0, d0, d1\n" 192 " vpadd.f32 d0, d0, d0\n" 193 " vmov.f32 %[ret], d0[0]\n" 194 : [ret] "=&r" (ret), [a] "+r" (a), [b] "+r" (b), 195 [len] "+l" (len), [remainder] "+l" (remainder) 196 : 197 : "cc", "q0", "q1", "q2", "q3", "q4", "q5", "q6", "q7", "q8", 198 "q9", "q10", "q11"); 199 return ret; 200 } 201 #endif