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 12 ; These functions are only valid when: 13 ; x_step_q4 == 16 14 ; w%4 == 0 15 ; h%4 == 0 16 ; taps == 8 17 ; VP9_FILTER_WEIGHT == 128 18 ; VP9_FILTER_SHIFT == 7 19 20 EXPORT |vp9_convolve8_horiz_neon| 21 EXPORT |vp9_convolve8_vert_neon| 22 IMPORT |vp9_convolve8_horiz_c| 23 IMPORT |vp9_convolve8_vert_c| 24 ARM 25 REQUIRE8 26 PRESERVE8 27 28 AREA ||.text||, CODE, READONLY, ALIGN=2 29 30 ; Multiply and accumulate by q0 31 MACRO 32 MULTIPLY_BY_Q0 $dst, $src0, $src1, $src2, $src3, $src4, $src5, $src6, $src7 33 vmull.s16 $dst, $src0, d0[0] 34 vmlal.s16 $dst, $src1, d0[1] 35 vmlal.s16 $dst, $src2, d0[2] 36 vmlal.s16 $dst, $src3, d0[3] 37 vmlal.s16 $dst, $src4, d1[0] 38 vmlal.s16 $dst, $src5, d1[1] 39 vmlal.s16 $dst, $src6, d1[2] 40 vmlal.s16 $dst, $src7, d1[3] 41 MEND 42 43; r0 const uint8_t *src 44; r1 int src_stride 45; r2 uint8_t *dst 46; r3 int dst_stride 47; sp[]const int16_t *filter_x 48; sp[]int x_step_q4 49; sp[]const int16_t *filter_y ; unused 50; sp[]int y_step_q4 ; unused 51; sp[]int w 52; sp[]int h 53 54|vp9_convolve8_horiz_neon| PROC 55 ldr r12, [sp, #4] ; x_step_q4 56 cmp r12, #16 57 bne vp9_convolve8_horiz_c 58 59 push {r4-r10, lr} 60 61 sub r0, r0, #3 ; adjust for taps 62 63 ldr r5, [sp, #32] ; filter_x 64 ldr r6, [sp, #48] ; w 65 ldr r7, [sp, #52] ; h 66 67 vld1.s16 {q0}, [r5] ; filter_x 68 69 sub r8, r1, r1, lsl #2 ; -src_stride * 3 70 add r8, r8, #4 ; -src_stride * 3 + 4 71 72 sub r4, r3, r3, lsl #2 ; -dst_stride * 3 73 add r4, r4, #4 ; -dst_stride * 3 + 4 74 75 rsb r9, r6, r1, lsl #2 ; reset src for outer loop 76 sub r9, r9, #7 77 rsb r12, r6, r3, lsl #2 ; reset dst for outer loop 78 79 mov r10, r6 ; w loop counter 80 81loop_horiz_v 82 vld1.8 {d24}, [r0], r1 83 vld1.8 {d25}, [r0], r1 84 vld1.8 {d26}, [r0], r1 85 vld1.8 {d27}, [r0], r8 86 87 vtrn.16 q12, q13 88 vtrn.8 d24, d25 89 vtrn.8 d26, d27 90 91 pld [r0, r1, lsl #2] 92 93 vmovl.u8 q8, d24 94 vmovl.u8 q9, d25 95 vmovl.u8 q10, d26 96 vmovl.u8 q11, d27 97 98 ; save a few instructions in the inner loop 99 vswp d17, d18 100 vmov d23, d21 101 102 add r0, r0, #3 103 104loop_horiz 105 add r5, r0, #64 106 107 vld1.32 {d28[]}, [r0], r1 108 vld1.32 {d29[]}, [r0], r1 109 vld1.32 {d31[]}, [r0], r1 110 vld1.32 {d30[]}, [r0], r8 111 112 pld [r5] 113 114 vtrn.16 d28, d31 115 vtrn.16 d29, d30 116 vtrn.8 d28, d29 117 vtrn.8 d31, d30 118 119 pld [r5, r1] 120 121 ; extract to s16 122 vtrn.32 q14, q15 123 vmovl.u8 q12, d28 124 vmovl.u8 q13, d29 125 126 pld [r5, r1, lsl #1] 127 128 ; src[] * filter_x 129 MULTIPLY_BY_Q0 q1, d16, d17, d20, d22, d18, d19, d23, d24 130 MULTIPLY_BY_Q0 q2, d17, d20, d22, d18, d19, d23, d24, d26 131 MULTIPLY_BY_Q0 q14, d20, d22, d18, d19, d23, d24, d26, d27 132 MULTIPLY_BY_Q0 q15, d22, d18, d19, d23, d24, d26, d27, d25 133 134 pld [r5, -r8] 135 136 ; += 64 >> 7 137 vqrshrun.s32 d2, q1, #7 138 vqrshrun.s32 d3, q2, #7 139 vqrshrun.s32 d4, q14, #7 140 vqrshrun.s32 d5, q15, #7 141 142 ; saturate 143 vqmovn.u16 d2, q1 144 vqmovn.u16 d3, q2 145 146 ; transpose 147 vtrn.16 d2, d3 148 vtrn.32 d2, d3 149 vtrn.8 d2, d3 150 151 vst1.u32 {d2[0]}, [r2@32], r3 152 vst1.u32 {d3[0]}, [r2@32], r3 153 vst1.u32 {d2[1]}, [r2@32], r3 154 vst1.u32 {d3[1]}, [r2@32], r4 155 156 vmov q8, q9 157 vmov d20, d23 158 vmov q11, q12 159 vmov q9, q13 160 161 subs r6, r6, #4 ; w -= 4 162 bgt loop_horiz 163 164 ; outer loop 165 mov r6, r10 ; restore w counter 166 add r0, r0, r9 ; src += src_stride * 4 - w 167 add r2, r2, r12 ; dst += dst_stride * 4 - w 168 subs r7, r7, #4 ; h -= 4 169 bgt loop_horiz_v 170 171 pop {r4-r10, pc} 172 173 ENDP 174 175|vp9_convolve8_vert_neon| PROC 176 ldr r12, [sp, #12] 177 cmp r12, #16 178 bne vp9_convolve8_vert_c 179 180 push {r4-r8, lr} 181 182 ; adjust for taps 183 sub r0, r0, r1 184 sub r0, r0, r1, lsl #1 185 186 ldr r4, [sp, #32] ; filter_y 187 ldr r6, [sp, #40] ; w 188 ldr lr, [sp, #44] ; h 189 190 vld1.s16 {q0}, [r4] ; filter_y 191 192 lsl r1, r1, #1 193 lsl r3, r3, #1 194 195loop_vert_h 196 mov r4, r0 197 add r7, r0, r1, asr #1 198 mov r5, r2 199 add r8, r2, r3, asr #1 200 mov r12, lr ; h loop counter 201 202 vld1.u32 {d16[0]}, [r4], r1 203 vld1.u32 {d16[1]}, [r7], r1 204 vld1.u32 {d18[0]}, [r4], r1 205 vld1.u32 {d18[1]}, [r7], r1 206 vld1.u32 {d20[0]}, [r4], r1 207 vld1.u32 {d20[1]}, [r7], r1 208 vld1.u32 {d22[0]}, [r4], r1 209 210 vmovl.u8 q8, d16 211 vmovl.u8 q9, d18 212 vmovl.u8 q10, d20 213 vmovl.u8 q11, d22 214 215loop_vert 216 ; always process a 4x4 block at a time 217 vld1.u32 {d24[0]}, [r7], r1 218 vld1.u32 {d26[0]}, [r4], r1 219 vld1.u32 {d26[1]}, [r7], r1 220 vld1.u32 {d24[1]}, [r4], r1 221 222 ; extract to s16 223 vmovl.u8 q12, d24 224 vmovl.u8 q13, d26 225 226 pld [r5] 227 pld [r8] 228 229 ; src[] * filter_y 230 MULTIPLY_BY_Q0 q1, d16, d17, d18, d19, d20, d21, d22, d24 231 232 pld [r5, r3] 233 pld [r8, r3] 234 235 MULTIPLY_BY_Q0 q2, d17, d18, d19, d20, d21, d22, d24, d26 236 237 pld [r7] 238 pld [r4] 239 240 MULTIPLY_BY_Q0 q14, d18, d19, d20, d21, d22, d24, d26, d27 241 242 pld [r7, r1] 243 pld [r4, r1] 244 245 MULTIPLY_BY_Q0 q15, d19, d20, d21, d22, d24, d26, d27, d25 246 247 ; += 64 >> 7 248 vqrshrun.s32 d2, q1, #7 249 vqrshrun.s32 d3, q2, #7 250 vqrshrun.s32 d4, q14, #7 251 vqrshrun.s32 d5, q15, #7 252 253 ; saturate 254 vqmovn.u16 d2, q1 255 vqmovn.u16 d3, q2 256 257 vst1.u32 {d2[0]}, [r5@32], r3 258 vst1.u32 {d2[1]}, [r8@32], r3 259 vst1.u32 {d3[0]}, [r5@32], r3 260 vst1.u32 {d3[1]}, [r8@32], r3 261 262 vmov q8, q10 263 vmov d18, d22 264 vmov d19, d24 265 vmov q10, q13 266 vmov d22, d25 267 268 subs r12, r12, #4 ; h -= 4 269 bgt loop_vert 270 271 ; outer loop 272 add r0, r0, #4 273 add r2, r2, #4 274 subs r6, r6, #4 ; w -= 4 275 bgt loop_vert_h 276 277 pop {r4-r8, pc} 278 279 ENDP 280 END 281