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comparison: gfx/ycbcr/yuv_convert_arm.cpp
gfx/ycbcr/yuv_convert_arm.cpp
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- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:bd860dcd55d8 |
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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // contributor Siarhei Siamashka <siarhei.siamashka@gmail.com> | |
| 6 | |
| 7 #include "yuv_convert.h" | |
| 8 #include "ycbcr_to_rgb565.h" | |
| 9 | |
| 10 | |
| 11 | |
| 12 #ifdef HAVE_YCBCR_TO_RGB565 | |
| 13 | |
| 14 namespace mozilla { | |
| 15 | |
| 16 namespace gfx { | |
| 17 | |
| 18 # if defined(MOZILLA_MAY_SUPPORT_NEON) | |
| 19 void __attribute((noinline,optimize("-fomit-frame-pointer"))) | |
| 20 yuv42x_to_rgb565_row_neon(uint16 *dst, | |
| 21 const uint8 *y, | |
| 22 const uint8 *u, | |
| 23 const uint8 *v, | |
| 24 int n, | |
| 25 int oddflag) | |
| 26 { | |
| 27 static __attribute__((aligned(16))) uint16 acc_r[8] = { | |
| 28 22840, 22840, 22840, 22840, 22840, 22840, 22840, 22840, | |
| 29 }; | |
| 30 static __attribute__((aligned(16))) uint16 acc_g[8] = { | |
| 31 17312, 17312, 17312, 17312, 17312, 17312, 17312, 17312, | |
| 32 }; | |
| 33 static __attribute__((aligned(16))) uint16 acc_b[8] = { | |
| 34 28832, 28832, 28832, 28832, 28832, 28832, 28832, 28832, | |
| 35 }; | |
| 36 /* | |
| 37 * Registers: | |
| 38 * q0, q1 : d0, d1, d2, d3 - are used for initial loading of YUV data | |
| 39 * q2 : d4, d5 - are used for storing converted RGB data | |
| 40 * q3 : d6, d7 - are used for temporary storage | |
| 41 * | |
| 42 * q4-q7 - reserved | |
| 43 * | |
| 44 * q8, q9 : d16, d17, d18, d19 - are used for expanded Y data | |
| 45 * q10 : d20, d21 | |
| 46 * q11 : d22, d23 | |
| 47 * q12 : d24, d25 | |
| 48 * q13 : d26, d27 | |
| 49 * q13, q14, q15 - various constants (#16, #149, #204, #50, #104, #154) | |
| 50 */ | |
| 51 asm volatile ( | |
| 52 ".fpu neon\n" | |
| 53 /* Allow to build on targets not supporting neon, and force the object file | |
| 54 * target to avoid bumping the final binary target */ | |
| 55 ".arch armv7-a\n" | |
| 56 ".object_arch armv4t\n" | |
| 57 ".macro convert_macroblock size\n" | |
| 58 /* load up to 16 source pixels */ | |
| 59 ".if \\size == 16\n" | |
| 60 "pld [%[y], #64]\n" | |
| 61 "pld [%[u], #64]\n" | |
| 62 "pld [%[v], #64]\n" | |
| 63 "vld1.8 {d1}, [%[y]]!\n" | |
| 64 "vld1.8 {d3}, [%[y]]!\n" | |
| 65 "vld1.8 {d0}, [%[u]]!\n" | |
| 66 "vld1.8 {d2}, [%[v]]!\n" | |
| 67 ".elseif \\size == 8\n" | |
| 68 "vld1.8 {d1}, [%[y]]!\n" | |
| 69 "vld1.8 {d0[0]}, [%[u]]!\n" | |
| 70 "vld1.8 {d0[1]}, [%[u]]!\n" | |
| 71 "vld1.8 {d0[2]}, [%[u]]!\n" | |
| 72 "vld1.8 {d0[3]}, [%[u]]!\n" | |
| 73 "vld1.8 {d2[0]}, [%[v]]!\n" | |
| 74 "vld1.8 {d2[1]}, [%[v]]!\n" | |
| 75 "vld1.8 {d2[2]}, [%[v]]!\n" | |
| 76 "vld1.8 {d2[3]}, [%[v]]!\n" | |
| 77 ".elseif \\size == 4\n" | |
| 78 "vld1.8 {d1[0]}, [%[y]]!\n" | |
| 79 "vld1.8 {d1[1]}, [%[y]]!\n" | |
| 80 "vld1.8 {d1[2]}, [%[y]]!\n" | |
| 81 "vld1.8 {d1[3]}, [%[y]]!\n" | |
| 82 "vld1.8 {d0[0]}, [%[u]]!\n" | |
| 83 "vld1.8 {d0[1]}, [%[u]]!\n" | |
| 84 "vld1.8 {d2[0]}, [%[v]]!\n" | |
| 85 "vld1.8 {d2[1]}, [%[v]]!\n" | |
| 86 ".elseif \\size == 2\n" | |
| 87 "vld1.8 {d1[0]}, [%[y]]!\n" | |
| 88 "vld1.8 {d1[1]}, [%[y]]!\n" | |
| 89 "vld1.8 {d0[0]}, [%[u]]!\n" | |
| 90 "vld1.8 {d2[0]}, [%[v]]!\n" | |
| 91 ".elseif \\size == 1\n" | |
| 92 "vld1.8 {d1[0]}, [%[y]]!\n" | |
| 93 "vld1.8 {d0[0]}, [%[u]]!\n" | |
| 94 "vld1.8 {d2[0]}, [%[v]]!\n" | |
| 95 ".else\n" | |
| 96 ".error \"unsupported macroblock size\"\n" | |
| 97 ".endif\n" | |
| 98 | |
| 99 /* d1 - Y data (first 8 bytes) */ | |
| 100 /* d3 - Y data (next 8 bytes) */ | |
| 101 /* d0 - U data, d2 - V data */ | |
| 102 | |
| 103 /* split even and odd Y color components */ | |
| 104 "vuzp.8 d1, d3\n" /* d1 - evenY, d3 - oddY */ | |
| 105 /* clip upper and lower boundaries */ | |
| 106 "vqadd.u8 q0, q0, q4\n" | |
| 107 "vqadd.u8 q1, q1, q4\n" | |
| 108 "vqsub.u8 q0, q0, q5\n" | |
| 109 "vqsub.u8 q1, q1, q5\n" | |
| 110 | |
| 111 "vshr.u8 d4, d2, #1\n" /* d4 = V >> 1 */ | |
| 112 | |
| 113 "vmull.u8 q8, d1, d27\n" /* q8 = evenY * 149 */ | |
| 114 "vmull.u8 q9, d3, d27\n" /* q9 = oddY * 149 */ | |
| 115 | |
| 116 "vld1.16 {d20, d21}, [%[acc_r], :128]\n" /* q10 - initialize accumulator for red */ | |
| 117 "vsubw.u8 q10, q10, d4\n" /* red acc -= (V >> 1) */ | |
| 118 "vmlsl.u8 q10, d2, d28\n" /* red acc -= V * 204 */ | |
| 119 "vld1.16 {d22, d23}, [%[acc_g], :128]\n" /* q11 - initialize accumulator for green */ | |
| 120 "vmlsl.u8 q11, d2, d30\n" /* green acc -= V * 104 */ | |
| 121 "vmlsl.u8 q11, d0, d29\n" /* green acc -= U * 50 */ | |
| 122 "vld1.16 {d24, d25}, [%[acc_b], :128]\n" /* q12 - initialize accumulator for blue */ | |
| 123 "vmlsl.u8 q12, d0, d30\n" /* blue acc -= U * 104 */ | |
| 124 "vmlsl.u8 q12, d0, d31\n" /* blue acc -= U * 154 */ | |
| 125 | |
| 126 "vhsub.s16 q3, q8, q10\n" /* calculate even red components */ | |
| 127 "vhsub.s16 q10, q9, q10\n" /* calculate odd red components */ | |
| 128 "vqshrun.s16 d0, q3, #6\n" /* right shift, narrow and saturate even red components */ | |
| 129 "vqshrun.s16 d3, q10, #6\n" /* right shift, narrow and saturate odd red components */ | |
| 130 | |
| 131 "vhadd.s16 q3, q8, q11\n" /* calculate even green components */ | |
| 132 "vhadd.s16 q11, q9, q11\n" /* calculate odd green components */ | |
| 133 "vqshrun.s16 d1, q3, #6\n" /* right shift, narrow and saturate even green components */ | |
| 134 "vqshrun.s16 d4, q11, #6\n" /* right shift, narrow and saturate odd green components */ | |
| 135 | |
| 136 "vhsub.s16 q3, q8, q12\n" /* calculate even blue components */ | |
| 137 "vhsub.s16 q12, q9, q12\n" /* calculate odd blue components */ | |
| 138 "vqshrun.s16 d2, q3, #6\n" /* right shift, narrow and saturate even blue components */ | |
| 139 "vqshrun.s16 d5, q12, #6\n" /* right shift, narrow and saturate odd blue components */ | |
| 140 | |
| 141 "vzip.8 d0, d3\n" /* join even and odd red components */ | |
| 142 "vzip.8 d1, d4\n" /* join even and odd green components */ | |
| 143 "vzip.8 d2, d5\n" /* join even and odd blue components */ | |
| 144 | |
| 145 "vshll.u8 q3, d0, #8\n\t" | |
| 146 "vshll.u8 q8, d1, #8\n\t" | |
| 147 "vshll.u8 q9, d2, #8\n\t" | |
| 148 "vsri.u16 q3, q8, #5\t\n" | |
| 149 "vsri.u16 q3, q9, #11\t\n" | |
| 150 /* store pixel data to memory */ | |
| 151 ".if \\size == 16\n" | |
| 152 " vst1.16 {d6, d7}, [%[dst]]!\n" | |
| 153 " vshll.u8 q3, d3, #8\n\t" | |
| 154 " vshll.u8 q8, d4, #8\n\t" | |
| 155 " vshll.u8 q9, d5, #8\n\t" | |
| 156 " vsri.u16 q3, q8, #5\t\n" | |
| 157 " vsri.u16 q3, q9, #11\t\n" | |
| 158 " vst1.16 {d6, d7}, [%[dst]]!\n" | |
| 159 ".elseif \\size == 8\n" | |
| 160 " vst1.16 {d6, d7}, [%[dst]]!\n" | |
| 161 ".elseif \\size == 4\n" | |
| 162 " vst1.16 {d6}, [%[dst]]!\n" | |
| 163 ".elseif \\size == 2\n" | |
| 164 " vst1.16 {d6[0]}, [%[dst]]!\n" | |
| 165 " vst1.16 {d6[1]}, [%[dst]]!\n" | |
| 166 ".elseif \\size == 1\n" | |
| 167 " vst1.16 {d6[0]}, [%[dst]]!\n" | |
| 168 ".endif\n" | |
| 169 ".endm\n" | |
| 170 | |
| 171 "vmov.u8 d8, #15\n" /* add this to U/V to saturate upper boundary */ | |
| 172 "vmov.u8 d9, #20\n" /* add this to Y to saturate upper boundary */ | |
| 173 "vmov.u8 d10, #31\n" /* sub this from U/V to saturate lower boundary */ | |
| 174 "vmov.u8 d11, #36\n" /* sub this from Y to saturate lower boundary */ | |
| 175 | |
| 176 "vmov.u8 d26, #16\n" | |
| 177 "vmov.u8 d27, #149\n" | |
| 178 "vmov.u8 d28, #204\n" | |
| 179 "vmov.u8 d29, #50\n" | |
| 180 "vmov.u8 d30, #104\n" | |
| 181 "vmov.u8 d31, #154\n" | |
| 182 | |
| 183 "cmp %[oddflag], #0\n" | |
| 184 "beq 1f\n" | |
| 185 "convert_macroblock 1\n" | |
| 186 "sub %[n], %[n], #1\n" | |
| 187 "1:\n" | |
| 188 "subs %[n], %[n], #16\n" | |
| 189 "blt 2f\n" | |
| 190 "1:\n" | |
| 191 "convert_macroblock 16\n" | |
| 192 "subs %[n], %[n], #16\n" | |
| 193 "bge 1b\n" | |
| 194 "2:\n" | |
| 195 "tst %[n], #8\n" | |
| 196 "beq 3f\n" | |
| 197 "convert_macroblock 8\n" | |
| 198 "3:\n" | |
| 199 "tst %[n], #4\n" | |
| 200 "beq 4f\n" | |
| 201 "convert_macroblock 4\n" | |
| 202 "4:\n" | |
| 203 "tst %[n], #2\n" | |
| 204 "beq 5f\n" | |
| 205 "convert_macroblock 2\n" | |
| 206 "5:\n" | |
| 207 "tst %[n], #1\n" | |
| 208 "beq 6f\n" | |
| 209 "convert_macroblock 1\n" | |
| 210 "6:\n" | |
| 211 ".purgem convert_macroblock\n" | |
| 212 : [y] "+&r" (y), [u] "+&r" (u), [v] "+&r" (v), [dst] "+&r" (dst), [n] "+&r" (n) | |
| 213 : [acc_r] "r" (&acc_r[0]), [acc_g] "r" (&acc_g[0]), [acc_b] "r" (&acc_b[0]), | |
| 214 [oddflag] "r" (oddflag) | |
| 215 : "cc", "memory", | |
| 216 "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", | |
| 217 "d8", "d9", "d10", "d11", /* "d12", "d13", "d14", "d15", */ | |
| 218 "d16", "d17", "d18", "d19", "d20", "d21", "d22", "d23", | |
| 219 "d24", "d25", "d26", "d27", "d28", "d29", "d30", "d31" | |
| 220 ); | |
| 221 } | |
| 222 # endif // MOZILLA_MAY_SUPPORT_NEON | |
| 223 | |
| 224 } // namespace gfx | |
| 225 | |
| 226 } // namespace mozilla | |
| 227 | |
| 228 #endif // HAVE_YCBCR_TO_RGB565 |
