The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1 | /* libs/pixelflinger/codeflinger/texturing.cpp |
| 2 | ** |
| 3 | ** Copyright 2006, The Android Open Source Project |
| 4 | ** |
| 5 | ** Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | ** you may not use this file except in compliance with the License. |
| 7 | ** You may obtain a copy of the License at |
| 8 | ** |
| 9 | ** http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | ** |
| 11 | ** Unless required by applicable law or agreed to in writing, software |
| 12 | ** distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | ** See the License for the specific language governing permissions and |
| 15 | ** limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #include <assert.h> |
| 19 | #include <stdint.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <stdio.h> |
| 22 | #include <sys/types.h> |
| 23 | |
| 24 | #include <cutils/log.h> |
| 25 | |
| 26 | #include "codeflinger/GGLAssembler.h" |
| 27 | |
Bruce Beare | 2bef93c | 2010-05-03 14:00:31 -0700 | [diff] [blame] | 28 | #ifdef __ARM_ARCH__ |
Martyn Capewell | 96dbb4f | 2009-12-07 13:59:59 +0000 | [diff] [blame] | 29 | #include <machine/cpu-features.h> |
Jean-Baptiste Queru | 9b6c850 | 2010-05-03 12:31:13 -0700 | [diff] [blame] | 30 | #endif |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 31 | |
| 32 | namespace android { |
| 33 | |
| 34 | // --------------------------------------------------------------------------- |
| 35 | |
| 36 | // iterators are initialized like this: |
| 37 | // (intToFixedCenter(x) * dx)>>16 + x0 |
| 38 | // ((x<<16 + 0x8000) * dx)>>16 + x0 |
| 39 | // ((x<<16)*dx + (0x8000*dx))>>16 + x0 |
| 40 | // ( (x*dx) + dx>>1 ) + x0 |
| 41 | // (x*dx) + (dx>>1 + x0) |
| 42 | |
| 43 | void GGLAssembler::init_iterated_color(fragment_parts_t& parts, const reg_t& x) |
| 44 | { |
| 45 | context_t const* c = mBuilderContext.c; |
| 46 | const needs_t& needs = mBuilderContext.needs; |
| 47 | |
| 48 | if (mSmooth) { |
| 49 | // NOTE: we could take this case in the mDithering + !mSmooth case, |
| 50 | // but this would use up to 4 more registers for the color components |
| 51 | // for only a little added quality. |
| 52 | // Currently, this causes the system to run out of registers in |
| 53 | // some case (see issue #719496) |
| 54 | |
| 55 | comment("compute initial iterated color (smooth and/or dither case)"); |
| 56 | |
| 57 | parts.iterated_packed = 0; |
| 58 | parts.packed = 0; |
| 59 | |
| 60 | // 0x1: color component |
| 61 | // 0x2: iterators |
| 62 | const int optReload = mOptLevel >> 1; |
| 63 | if (optReload >= 3) parts.reload = 0; // reload nothing |
| 64 | else if (optReload == 2) parts.reload = 2; // reload iterators |
| 65 | else if (optReload == 1) parts.reload = 1; // reload colors |
| 66 | else if (optReload <= 0) parts.reload = 3; // reload both |
| 67 | |
| 68 | if (!mSmooth) { |
| 69 | // we're not smoothing (just dithering), we never have to |
| 70 | // reload the iterators |
| 71 | parts.reload &= ~2; |
| 72 | } |
| 73 | |
| 74 | Scratch scratches(registerFile()); |
| 75 | const int t0 = (parts.reload & 1) ? scratches.obtain() : 0; |
| 76 | const int t1 = (parts.reload & 2) ? scratches.obtain() : 0; |
| 77 | for (int i=0 ; i<4 ; i++) { |
| 78 | if (!mInfo[i].iterated) |
| 79 | continue; |
| 80 | |
| 81 | // this component exists in the destination and is not replaced |
| 82 | // by a texture unit. |
| 83 | const int c = (parts.reload & 1) ? t0 : obtainReg(); |
| 84 | if (i==0) CONTEXT_LOAD(c, iterators.ydady); |
| 85 | if (i==1) CONTEXT_LOAD(c, iterators.ydrdy); |
| 86 | if (i==2) CONTEXT_LOAD(c, iterators.ydgdy); |
| 87 | if (i==3) CONTEXT_LOAD(c, iterators.ydbdy); |
| 88 | parts.argb[i].reg = c; |
| 89 | |
| 90 | if (mInfo[i].smooth) { |
| 91 | parts.argb_dx[i].reg = (parts.reload & 2) ? t1 : obtainReg(); |
| 92 | const int dvdx = parts.argb_dx[i].reg; |
| 93 | CONTEXT_LOAD(dvdx, generated_vars.argb[i].dx); |
| 94 | MLA(AL, 0, c, x.reg, dvdx, c); |
| 95 | |
| 96 | // adjust the color iterator to make sure it won't overflow |
| 97 | if (!mAA) { |
| 98 | // this is not needed when we're using anti-aliasing |
| 99 | // because we will (have to) clamp the components |
| 100 | // anyway. |
| 101 | int end = scratches.obtain(); |
| 102 | MOV(AL, 0, end, reg_imm(parts.count.reg, LSR, 16)); |
| 103 | MLA(AL, 1, end, dvdx, end, c); |
| 104 | SUB(MI, 0, c, c, end); |
| 105 | BIC(AL, 0, c, c, reg_imm(c, ASR, 31)); |
| 106 | scratches.recycle(end); |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | if (parts.reload & 1) { |
| 111 | CONTEXT_STORE(c, generated_vars.argb[i].c); |
| 112 | } |
| 113 | } |
| 114 | } else { |
| 115 | // We're not smoothed, so we can |
| 116 | // just use a packed version of the color and extract the |
| 117 | // components as needed (or not at all if we don't blend) |
| 118 | |
| 119 | // figure out if we need the iterated color |
| 120 | int load = 0; |
| 121 | for (int i=0 ; i<4 ; i++) { |
| 122 | component_info_t& info = mInfo[i]; |
| 123 | if ((info.inDest || info.needed) && !info.replaced) |
| 124 | load |= 1; |
| 125 | } |
| 126 | |
| 127 | parts.iterated_packed = 1; |
| 128 | parts.packed = (!mTextureMachine.mask && !mBlending |
| 129 | && !mFog && !mDithering); |
| 130 | parts.reload = 0; |
| 131 | if (load || parts.packed) { |
| 132 | if (mBlending || mDithering || mInfo[GGLFormat::ALPHA].needed) { |
| 133 | comment("load initial iterated color (8888 packed)"); |
| 134 | parts.iterated.setTo(obtainReg(), |
| 135 | &(c->formats[GGL_PIXEL_FORMAT_RGBA_8888])); |
| 136 | CONTEXT_LOAD(parts.iterated.reg, packed8888); |
| 137 | } else { |
| 138 | comment("load initial iterated color (dest format packed)"); |
| 139 | |
| 140 | parts.iterated.setTo(obtainReg(), &mCbFormat); |
| 141 | |
| 142 | // pre-mask the iterated color |
| 143 | const int bits = parts.iterated.size(); |
| 144 | const uint32_t size = ((bits>=32) ? 0 : (1LU << bits)) - 1; |
| 145 | uint32_t mask = 0; |
| 146 | if (mMasking) { |
| 147 | for (int i=0 ; i<4 ; i++) { |
| 148 | const int component_mask = 1<<i; |
| 149 | const int h = parts.iterated.format.c[i].h; |
| 150 | const int l = parts.iterated.format.c[i].l; |
| 151 | if (h && (!(mMasking & component_mask))) { |
| 152 | mask |= ((1<<(h-l))-1) << l; |
| 153 | } |
| 154 | } |
| 155 | } |
| 156 | |
| 157 | if (mMasking && ((mask & size)==0)) { |
| 158 | // none of the components are present in the mask |
| 159 | } else { |
| 160 | CONTEXT_LOAD(parts.iterated.reg, packed); |
| 161 | if (mCbFormat.size == 1) { |
| 162 | AND(AL, 0, parts.iterated.reg, |
| 163 | parts.iterated.reg, imm(0xFF)); |
| 164 | } else if (mCbFormat.size == 2) { |
| 165 | MOV(AL, 0, parts.iterated.reg, |
| 166 | reg_imm(parts.iterated.reg, LSR, 16)); |
| 167 | } |
| 168 | } |
| 169 | |
| 170 | // pre-mask the iterated color |
| 171 | if (mMasking) { |
| 172 | build_and_immediate(parts.iterated.reg, parts.iterated.reg, |
| 173 | mask, bits); |
| 174 | } |
| 175 | } |
| 176 | } |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | void GGLAssembler::build_iterated_color( |
| 181 | component_t& fragment, |
| 182 | const fragment_parts_t& parts, |
| 183 | int component, |
| 184 | Scratch& regs) |
| 185 | { |
| 186 | fragment.setTo( regs.obtain(), 0, 32, CORRUPTIBLE); |
| 187 | |
| 188 | if (!mInfo[component].iterated) |
| 189 | return; |
| 190 | |
| 191 | if (parts.iterated_packed) { |
| 192 | // iterated colors are packed, extract the one we need |
| 193 | extract(fragment, parts.iterated, component); |
| 194 | } else { |
| 195 | fragment.h = GGL_COLOR_BITS; |
| 196 | fragment.l = GGL_COLOR_BITS - 8; |
| 197 | fragment.flags |= CLEAR_LO; |
| 198 | // iterated colors are held in their own register, |
| 199 | // (smooth and/or dithering case) |
| 200 | if (parts.reload==3) { |
| 201 | // this implies mSmooth |
| 202 | Scratch scratches(registerFile()); |
| 203 | int dx = scratches.obtain(); |
| 204 | CONTEXT_LOAD(fragment.reg, generated_vars.argb[component].c); |
| 205 | CONTEXT_LOAD(dx, generated_vars.argb[component].dx); |
| 206 | ADD(AL, 0, dx, fragment.reg, dx); |
| 207 | CONTEXT_STORE(dx, generated_vars.argb[component].c); |
| 208 | } else if (parts.reload & 1) { |
| 209 | CONTEXT_LOAD(fragment.reg, generated_vars.argb[component].c); |
| 210 | } else { |
| 211 | // we don't reload, so simply rename the register and mark as |
| 212 | // non CORRUPTIBLE so that the texture env or blending code |
| 213 | // won't modify this (renamed) register |
| 214 | regs.recycle(fragment.reg); |
| 215 | fragment.reg = parts.argb[component].reg; |
| 216 | fragment.flags &= ~CORRUPTIBLE; |
| 217 | } |
| 218 | if (mInfo[component].smooth && mAA) { |
| 219 | // when using smooth shading AND anti-aliasing, we need to clamp |
| 220 | // the iterators because there is always an extra pixel on the |
| 221 | // edges, which most of the time will cause an overflow |
| 222 | // (since technically its outside of the domain). |
| 223 | BIC(AL, 0, fragment.reg, fragment.reg, |
| 224 | reg_imm(fragment.reg, ASR, 31)); |
| 225 | component_sat(fragment); |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | // --------------------------------------------------------------------------- |
| 231 | |
| 232 | void GGLAssembler::decodeLogicOpNeeds(const needs_t& needs) |
| 233 | { |
| 234 | // gather some informations about the components we need to process... |
| 235 | const int opcode = GGL_READ_NEEDS(LOGIC_OP, needs.n) | GGL_CLEAR; |
| 236 | switch(opcode) { |
| 237 | case GGL_COPY: |
| 238 | mLogicOp = 0; |
| 239 | break; |
| 240 | case GGL_CLEAR: |
| 241 | case GGL_SET: |
| 242 | mLogicOp = LOGIC_OP; |
| 243 | break; |
| 244 | case GGL_AND: |
| 245 | case GGL_AND_REVERSE: |
| 246 | case GGL_AND_INVERTED: |
| 247 | case GGL_XOR: |
| 248 | case GGL_OR: |
| 249 | case GGL_NOR: |
| 250 | case GGL_EQUIV: |
| 251 | case GGL_OR_REVERSE: |
| 252 | case GGL_OR_INVERTED: |
| 253 | case GGL_NAND: |
| 254 | mLogicOp = LOGIC_OP|LOGIC_OP_SRC|LOGIC_OP_DST; |
| 255 | break; |
| 256 | case GGL_NOOP: |
| 257 | case GGL_INVERT: |
| 258 | mLogicOp = LOGIC_OP|LOGIC_OP_DST; |
| 259 | break; |
| 260 | case GGL_COPY_INVERTED: |
| 261 | mLogicOp = LOGIC_OP|LOGIC_OP_SRC; |
| 262 | break; |
| 263 | }; |
| 264 | } |
| 265 | |
| 266 | void GGLAssembler::decodeTMUNeeds(const needs_t& needs, context_t const* c) |
| 267 | { |
| 268 | uint8_t replaced=0; |
| 269 | mTextureMachine.mask = 0; |
| 270 | mTextureMachine.activeUnits = 0; |
| 271 | for (int i=GGL_TEXTURE_UNIT_COUNT-1 ; i>=0 ; i--) { |
| 272 | texture_unit_t& tmu = mTextureMachine.tmu[i]; |
| 273 | if (replaced == 0xF) { |
| 274 | // all components are replaced, skip this TMU. |
| 275 | tmu.format_idx = 0; |
| 276 | tmu.mask = 0; |
| 277 | tmu.replaced = replaced; |
| 278 | continue; |
| 279 | } |
| 280 | tmu.format_idx = GGL_READ_NEEDS(T_FORMAT, needs.t[i]); |
| 281 | tmu.format = c->formats[tmu.format_idx]; |
| 282 | tmu.bits = tmu.format.size*8; |
| 283 | tmu.swrap = GGL_READ_NEEDS(T_S_WRAP, needs.t[i]); |
| 284 | tmu.twrap = GGL_READ_NEEDS(T_T_WRAP, needs.t[i]); |
| 285 | tmu.env = ggl_needs_to_env(GGL_READ_NEEDS(T_ENV, needs.t[i])); |
| 286 | tmu.pot = GGL_READ_NEEDS(T_POT, needs.t[i]); |
| 287 | tmu.linear = GGL_READ_NEEDS(T_LINEAR, needs.t[i]) |
| 288 | && tmu.format.size!=3; // XXX: only 8, 16 and 32 modes for now |
| 289 | |
| 290 | // 5551 linear filtering is not supported |
| 291 | if (tmu.format_idx == GGL_PIXEL_FORMAT_RGBA_5551) |
| 292 | tmu.linear = 0; |
| 293 | |
| 294 | tmu.mask = 0; |
| 295 | tmu.replaced = replaced; |
| 296 | |
| 297 | if (tmu.format_idx) { |
| 298 | mTextureMachine.activeUnits++; |
| 299 | if (tmu.format.c[0].h) tmu.mask |= 0x1; |
| 300 | if (tmu.format.c[1].h) tmu.mask |= 0x2; |
| 301 | if (tmu.format.c[2].h) tmu.mask |= 0x4; |
| 302 | if (tmu.format.c[3].h) tmu.mask |= 0x8; |
| 303 | if (tmu.env == GGL_REPLACE) { |
| 304 | replaced |= tmu.mask; |
| 305 | } else if (tmu.env == GGL_DECAL) { |
| 306 | if (!tmu.format.c[GGLFormat::ALPHA].h) { |
| 307 | // if we don't have alpha, decal does nothing |
| 308 | tmu.mask = 0; |
| 309 | } else { |
| 310 | // decal always ignores At |
| 311 | tmu.mask &= ~(1<<GGLFormat::ALPHA); |
| 312 | } |
| 313 | } |
| 314 | } |
| 315 | mTextureMachine.mask |= tmu.mask; |
| 316 | //printf("%d: mask=%08lx, replaced=%08lx\n", |
| 317 | // i, int(tmu.mask), int(tmu.replaced)); |
| 318 | } |
| 319 | mTextureMachine.replaced = replaced; |
| 320 | mTextureMachine.directTexture = 0; |
| 321 | //printf("replaced=%08lx\n", mTextureMachine.replaced); |
| 322 | } |
| 323 | |
| 324 | |
| 325 | void GGLAssembler::init_textures( |
| 326 | tex_coord_t* coords, |
| 327 | const reg_t& x, const reg_t& y) |
| 328 | { |
| 329 | context_t const* c = mBuilderContext.c; |
| 330 | const needs_t& needs = mBuilderContext.needs; |
| 331 | int Rctx = mBuilderContext.Rctx; |
| 332 | int Rx = x.reg; |
| 333 | int Ry = y.reg; |
| 334 | |
| 335 | if (mTextureMachine.mask) { |
| 336 | comment("compute texture coordinates"); |
| 337 | } |
| 338 | |
| 339 | // init texture coordinates for each tmu |
| 340 | const int cb_format_idx = GGL_READ_NEEDS(CB_FORMAT, needs.n); |
| 341 | const bool multiTexture = mTextureMachine.activeUnits > 1; |
| 342 | for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT; i++) { |
| 343 | const texture_unit_t& tmu = mTextureMachine.tmu[i]; |
| 344 | if (tmu.format_idx == 0) |
| 345 | continue; |
| 346 | if ((tmu.swrap == GGL_NEEDS_WRAP_11) && |
| 347 | (tmu.twrap == GGL_NEEDS_WRAP_11)) |
| 348 | { |
| 349 | // 1:1 texture |
| 350 | pointer_t& txPtr = coords[i].ptr; |
| 351 | txPtr.setTo(obtainReg(), tmu.bits); |
| 352 | CONTEXT_LOAD(txPtr.reg, state.texture[i].iterators.ydsdy); |
| 353 | ADD(AL, 0, Rx, Rx, reg_imm(txPtr.reg, ASR, 16)); // x += (s>>16) |
| 354 | CONTEXT_LOAD(txPtr.reg, state.texture[i].iterators.ydtdy); |
| 355 | ADD(AL, 0, Ry, Ry, reg_imm(txPtr.reg, ASR, 16)); // y += (t>>16) |
| 356 | // merge base & offset |
| 357 | CONTEXT_LOAD(txPtr.reg, generated_vars.texture[i].stride); |
| 358 | SMLABB(AL, Rx, Ry, txPtr.reg, Rx); // x+y*stride |
| 359 | CONTEXT_LOAD(txPtr.reg, generated_vars.texture[i].data); |
| 360 | base_offset(txPtr, txPtr, Rx); |
| 361 | } else { |
| 362 | Scratch scratches(registerFile()); |
| 363 | reg_t& s = coords[i].s; |
| 364 | reg_t& t = coords[i].t; |
| 365 | // s = (x * dsdx)>>16 + ydsdy |
| 366 | // s = (x * dsdx)>>16 + (y*dsdy)>>16 + s0 |
| 367 | // t = (x * dtdx)>>16 + ydtdy |
| 368 | // t = (x * dtdx)>>16 + (y*dtdy)>>16 + t0 |
| 369 | s.setTo(obtainReg()); |
| 370 | t.setTo(obtainReg()); |
| 371 | const int need_w = GGL_READ_NEEDS(W, needs.n); |
| 372 | if (need_w) { |
| 373 | CONTEXT_LOAD(s.reg, state.texture[i].iterators.ydsdy); |
| 374 | CONTEXT_LOAD(t.reg, state.texture[i].iterators.ydtdy); |
| 375 | } else { |
| 376 | int ydsdy = scratches.obtain(); |
| 377 | int ydtdy = scratches.obtain(); |
| 378 | CONTEXT_LOAD(s.reg, generated_vars.texture[i].dsdx); |
| 379 | CONTEXT_LOAD(ydsdy, state.texture[i].iterators.ydsdy); |
| 380 | CONTEXT_LOAD(t.reg, generated_vars.texture[i].dtdx); |
| 381 | CONTEXT_LOAD(ydtdy, state.texture[i].iterators.ydtdy); |
| 382 | MLA(AL, 0, s.reg, Rx, s.reg, ydsdy); |
| 383 | MLA(AL, 0, t.reg, Rx, t.reg, ydtdy); |
| 384 | } |
| 385 | |
| 386 | if ((mOptLevel&1)==0) { |
| 387 | CONTEXT_STORE(s.reg, generated_vars.texture[i].spill[0]); |
| 388 | CONTEXT_STORE(t.reg, generated_vars.texture[i].spill[1]); |
| 389 | recycleReg(s.reg); |
| 390 | recycleReg(t.reg); |
| 391 | } |
| 392 | } |
| 393 | |
| 394 | // direct texture? |
| 395 | if (!multiTexture && !mBlending && !mDithering && !mFog && |
| 396 | cb_format_idx == tmu.format_idx && !tmu.linear && |
| 397 | mTextureMachine.replaced == tmu.mask) |
| 398 | { |
| 399 | mTextureMachine.directTexture = i + 1; |
| 400 | } |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | void GGLAssembler::build_textures( fragment_parts_t& parts, |
| 405 | Scratch& regs) |
| 406 | { |
| 407 | context_t const* c = mBuilderContext.c; |
| 408 | const needs_t& needs = mBuilderContext.needs; |
| 409 | int Rctx = mBuilderContext.Rctx; |
| 410 | |
| 411 | // We don't have a way to spill registers automatically |
| 412 | // spill depth and AA regs, when we know we may have to. |
| 413 | // build the spill list... |
| 414 | uint32_t spill_list = 0; |
| 415 | for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT; i++) { |
| 416 | const texture_unit_t& tmu = mTextureMachine.tmu[i]; |
| 417 | if (tmu.format_idx == 0) |
| 418 | continue; |
| 419 | if (tmu.linear) { |
| 420 | // we may run out of register if we have linear filtering |
| 421 | // at 1 or 4 bytes / pixel on any texture unit. |
| 422 | if (tmu.format.size == 1) { |
| 423 | // if depth and AA enabled, we'll run out of 1 register |
| 424 | if (parts.z.reg > 0 && parts.covPtr.reg > 0) |
| 425 | spill_list |= 1<<parts.covPtr.reg; |
| 426 | } |
| 427 | if (tmu.format.size == 4) { |
| 428 | // if depth or AA enabled, we'll run out of 1 or 2 registers |
| 429 | if (parts.z.reg > 0) |
| 430 | spill_list |= 1<<parts.z.reg; |
| 431 | if (parts.covPtr.reg > 0) |
| 432 | spill_list |= 1<<parts.covPtr.reg; |
| 433 | } |
| 434 | } |
| 435 | } |
| 436 | |
| 437 | Spill spill(registerFile(), *this, spill_list); |
| 438 | |
| 439 | const bool multiTexture = mTextureMachine.activeUnits > 1; |
| 440 | for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT; i++) { |
| 441 | const texture_unit_t& tmu = mTextureMachine.tmu[i]; |
| 442 | if (tmu.format_idx == 0) |
| 443 | continue; |
| 444 | |
| 445 | pointer_t& txPtr = parts.coords[i].ptr; |
| 446 | pixel_t& texel = parts.texel[i]; |
| 447 | |
| 448 | // repeat... |
| 449 | if ((tmu.swrap == GGL_NEEDS_WRAP_11) && |
| 450 | (tmu.twrap == GGL_NEEDS_WRAP_11)) |
| 451 | { // 1:1 textures |
| 452 | comment("fetch texel"); |
| 453 | texel.setTo(regs.obtain(), &tmu.format); |
| 454 | load(txPtr, texel, WRITE_BACK); |
| 455 | } else { |
| 456 | Scratch scratches(registerFile()); |
| 457 | reg_t& s = parts.coords[i].s; |
| 458 | reg_t& t = parts.coords[i].t; |
| 459 | if ((mOptLevel&1)==0) { |
| 460 | comment("reload s/t (multitexture or linear filtering)"); |
| 461 | s.reg = scratches.obtain(); |
| 462 | t.reg = scratches.obtain(); |
| 463 | CONTEXT_LOAD(s.reg, generated_vars.texture[i].spill[0]); |
| 464 | CONTEXT_LOAD(t.reg, generated_vars.texture[i].spill[1]); |
| 465 | } |
| 466 | |
| 467 | comment("compute repeat/clamp"); |
| 468 | int u = scratches.obtain(); |
| 469 | int v = scratches.obtain(); |
| 470 | int width = scratches.obtain(); |
| 471 | int height = scratches.obtain(); |
| 472 | int U = 0; |
| 473 | int V = 0; |
| 474 | |
| 475 | CONTEXT_LOAD(width, generated_vars.texture[i].width); |
| 476 | CONTEXT_LOAD(height, generated_vars.texture[i].height); |
| 477 | |
| 478 | int FRAC_BITS = 0; |
| 479 | if (tmu.linear) { |
| 480 | // linear interpolation |
| 481 | if (tmu.format.size == 1) { |
| 482 | // for 8-bits textures, we can afford |
| 483 | // 7 bits of fractional precision at no |
| 484 | // additional cost (we can't do 8 bits |
| 485 | // because filter8 uses signed 16 bits muls) |
| 486 | FRAC_BITS = 7; |
| 487 | } else if (tmu.format.size == 2) { |
| 488 | // filter16() is internally limited to 4 bits, so: |
| 489 | // FRAC_BITS=2 generates less instructions, |
| 490 | // FRAC_BITS=3,4,5 creates unpleasant artifacts, |
| 491 | // FRAC_BITS=6+ looks good |
| 492 | FRAC_BITS = 6; |
| 493 | } else if (tmu.format.size == 4) { |
| 494 | // filter32() is internally limited to 8 bits, so: |
| 495 | // FRAC_BITS=4 looks good |
| 496 | // FRAC_BITS=5+ looks better, but generates 3 extra ipp |
| 497 | FRAC_BITS = 6; |
| 498 | } else { |
| 499 | // for all other cases we use 4 bits. |
| 500 | FRAC_BITS = 4; |
| 501 | } |
| 502 | } |
| 503 | wrapping(u, s.reg, width, tmu.swrap, FRAC_BITS); |
| 504 | wrapping(v, t.reg, height, tmu.twrap, FRAC_BITS); |
| 505 | |
| 506 | if (tmu.linear) { |
| 507 | comment("compute linear filtering offsets"); |
| 508 | // pixel size scale |
| 509 | const int shift = 31 - gglClz(tmu.format.size); |
| 510 | U = scratches.obtain(); |
| 511 | V = scratches.obtain(); |
| 512 | |
| 513 | // sample the texel center |
| 514 | SUB(AL, 0, u, u, imm(1<<(FRAC_BITS-1))); |
| 515 | SUB(AL, 0, v, v, imm(1<<(FRAC_BITS-1))); |
| 516 | |
| 517 | // get the fractionnal part of U,V |
| 518 | AND(AL, 0, U, u, imm((1<<FRAC_BITS)-1)); |
| 519 | AND(AL, 0, V, v, imm((1<<FRAC_BITS)-1)); |
| 520 | |
| 521 | // compute width-1 and height-1 |
| 522 | SUB(AL, 0, width, width, imm(1)); |
| 523 | SUB(AL, 0, height, height, imm(1)); |
| 524 | |
| 525 | // get the integer part of U,V and clamp/wrap |
| 526 | // and compute offset to the next texel |
| 527 | if (tmu.swrap == GGL_NEEDS_WRAP_REPEAT) { |
| 528 | // u has already been REPEATed |
| 529 | MOV(AL, 1, u, reg_imm(u, ASR, FRAC_BITS)); |
| 530 | MOV(MI, 0, u, width); |
| 531 | CMP(AL, u, width); |
| 532 | MOV(LT, 0, width, imm(1 << shift)); |
| 533 | if (shift) |
| 534 | MOV(GE, 0, width, reg_imm(width, LSL, shift)); |
| 535 | RSB(GE, 0, width, width, imm(0)); |
| 536 | } else { |
| 537 | // u has not been CLAMPed yet |
| 538 | // algorithm: |
| 539 | // if ((u>>4) >= width) |
| 540 | // u = width<<4 |
| 541 | // width = 0 |
| 542 | // else |
| 543 | // width = 1<<shift |
| 544 | // u = u>>4; // get integer part |
| 545 | // if (u<0) |
| 546 | // u = 0 |
| 547 | // width = 0 |
| 548 | // generated_vars.rt = width |
| 549 | |
| 550 | CMP(AL, width, reg_imm(u, ASR, FRAC_BITS)); |
| 551 | MOV(LE, 0, u, reg_imm(width, LSL, FRAC_BITS)); |
| 552 | MOV(LE, 0, width, imm(0)); |
| 553 | MOV(GT, 0, width, imm(1 << shift)); |
| 554 | MOV(AL, 1, u, reg_imm(u, ASR, FRAC_BITS)); |
| 555 | MOV(MI, 0, u, imm(0)); |
| 556 | MOV(MI, 0, width, imm(0)); |
| 557 | } |
| 558 | CONTEXT_STORE(width, generated_vars.rt); |
| 559 | |
| 560 | const int stride = width; |
| 561 | CONTEXT_LOAD(stride, generated_vars.texture[i].stride); |
| 562 | if (tmu.twrap == GGL_NEEDS_WRAP_REPEAT) { |
| 563 | // v has already been REPEATed |
| 564 | MOV(AL, 1, v, reg_imm(v, ASR, FRAC_BITS)); |
| 565 | MOV(MI, 0, v, height); |
| 566 | CMP(AL, v, height); |
| 567 | MOV(LT, 0, height, imm(1 << shift)); |
| 568 | if (shift) |
| 569 | MOV(GE, 0, height, reg_imm(height, LSL, shift)); |
| 570 | RSB(GE, 0, height, height, imm(0)); |
| 571 | MUL(AL, 0, height, stride, height); |
| 572 | } else { |
Martyn Capewell | 96dbb4f | 2009-12-07 13:59:59 +0000 | [diff] [blame] | 573 | // v has not been CLAMPed yet |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 574 | CMP(AL, height, reg_imm(v, ASR, FRAC_BITS)); |
| 575 | MOV(LE, 0, v, reg_imm(height, LSL, FRAC_BITS)); |
| 576 | MOV(LE, 0, height, imm(0)); |
| 577 | if (shift) { |
| 578 | MOV(GT, 0, height, reg_imm(stride, LSL, shift)); |
| 579 | } else { |
| 580 | MOV(GT, 0, height, stride); |
| 581 | } |
| 582 | MOV(AL, 1, v, reg_imm(v, ASR, FRAC_BITS)); |
| 583 | MOV(MI, 0, v, imm(0)); |
| 584 | MOV(MI, 0, height, imm(0)); |
| 585 | } |
| 586 | CONTEXT_STORE(height, generated_vars.lb); |
| 587 | } |
| 588 | |
| 589 | scratches.recycle(width); |
| 590 | scratches.recycle(height); |
| 591 | |
| 592 | // iterate texture coordinates... |
| 593 | comment("iterate s,t"); |
| 594 | int dsdx = scratches.obtain(); |
| 595 | int dtdx = scratches.obtain(); |
| 596 | CONTEXT_LOAD(dsdx, generated_vars.texture[i].dsdx); |
| 597 | CONTEXT_LOAD(dtdx, generated_vars.texture[i].dtdx); |
| 598 | ADD(AL, 0, s.reg, s.reg, dsdx); |
| 599 | ADD(AL, 0, t.reg, t.reg, dtdx); |
| 600 | if ((mOptLevel&1)==0) { |
| 601 | CONTEXT_STORE(s.reg, generated_vars.texture[i].spill[0]); |
| 602 | CONTEXT_STORE(t.reg, generated_vars.texture[i].spill[1]); |
| 603 | scratches.recycle(s.reg); |
| 604 | scratches.recycle(t.reg); |
| 605 | } |
| 606 | scratches.recycle(dsdx); |
| 607 | scratches.recycle(dtdx); |
| 608 | |
| 609 | // merge base & offset... |
| 610 | comment("merge base & offset"); |
| 611 | texel.setTo(regs.obtain(), &tmu.format); |
| 612 | txPtr.setTo(texel.reg, tmu.bits); |
| 613 | int stride = scratches.obtain(); |
| 614 | CONTEXT_LOAD(stride, generated_vars.texture[i].stride); |
| 615 | CONTEXT_LOAD(txPtr.reg, generated_vars.texture[i].data); |
| 616 | SMLABB(AL, u, v, stride, u); // u+v*stride |
| 617 | base_offset(txPtr, txPtr, u); |
| 618 | |
| 619 | // load texel |
| 620 | if (!tmu.linear) { |
| 621 | comment("fetch texel"); |
| 622 | load(txPtr, texel, 0); |
| 623 | } else { |
| 624 | // recycle registers we don't need anymore |
| 625 | scratches.recycle(u); |
| 626 | scratches.recycle(v); |
| 627 | scratches.recycle(stride); |
| 628 | |
| 629 | comment("fetch texel, bilinear"); |
| 630 | switch (tmu.format.size) { |
| 631 | case 1: filter8(parts, texel, tmu, U, V, txPtr, FRAC_BITS); break; |
| 632 | case 2: filter16(parts, texel, tmu, U, V, txPtr, FRAC_BITS); break; |
| 633 | case 3: filter24(parts, texel, tmu, U, V, txPtr, FRAC_BITS); break; |
| 634 | case 4: filter32(parts, texel, tmu, U, V, txPtr, FRAC_BITS); break; |
| 635 | } |
| 636 | } |
| 637 | } |
| 638 | } |
| 639 | } |
| 640 | |
| 641 | void GGLAssembler::build_iterate_texture_coordinates( |
| 642 | const fragment_parts_t& parts) |
| 643 | { |
| 644 | const bool multiTexture = mTextureMachine.activeUnits > 1; |
| 645 | for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT; i++) { |
| 646 | const texture_unit_t& tmu = mTextureMachine.tmu[i]; |
| 647 | if (tmu.format_idx == 0) |
| 648 | continue; |
| 649 | |
| 650 | if ((tmu.swrap == GGL_NEEDS_WRAP_11) && |
| 651 | (tmu.twrap == GGL_NEEDS_WRAP_11)) |
| 652 | { // 1:1 textures |
| 653 | const pointer_t& txPtr = parts.coords[i].ptr; |
| 654 | ADD(AL, 0, txPtr.reg, txPtr.reg, imm(txPtr.size>>3)); |
| 655 | } else { |
| 656 | Scratch scratches(registerFile()); |
| 657 | int s = parts.coords[i].s.reg; |
| 658 | int t = parts.coords[i].t.reg; |
| 659 | if ((mOptLevel&1)==0) { |
| 660 | s = scratches.obtain(); |
| 661 | t = scratches.obtain(); |
| 662 | CONTEXT_LOAD(s, generated_vars.texture[i].spill[0]); |
| 663 | CONTEXT_LOAD(t, generated_vars.texture[i].spill[1]); |
| 664 | } |
| 665 | int dsdx = scratches.obtain(); |
| 666 | int dtdx = scratches.obtain(); |
| 667 | CONTEXT_LOAD(dsdx, generated_vars.texture[i].dsdx); |
| 668 | CONTEXT_LOAD(dtdx, generated_vars.texture[i].dtdx); |
| 669 | ADD(AL, 0, s, s, dsdx); |
| 670 | ADD(AL, 0, t, t, dtdx); |
| 671 | if ((mOptLevel&1)==0) { |
| 672 | CONTEXT_STORE(s, generated_vars.texture[i].spill[0]); |
| 673 | CONTEXT_STORE(t, generated_vars.texture[i].spill[1]); |
| 674 | } |
| 675 | } |
| 676 | } |
| 677 | } |
| 678 | |
| 679 | void GGLAssembler::filter8( |
| 680 | const fragment_parts_t& parts, |
| 681 | pixel_t& texel, const texture_unit_t& tmu, |
| 682 | int U, int V, pointer_t& txPtr, |
| 683 | int FRAC_BITS) |
| 684 | { |
| 685 | if (tmu.format.components != GGL_ALPHA && |
| 686 | tmu.format.components != GGL_LUMINANCE) |
| 687 | { |
| 688 | // this is a packed format, and we don't support |
| 689 | // linear filtering (it's probably RGB 332) |
| 690 | // Should not happen with OpenGL|ES |
| 691 | LDRB(AL, texel.reg, txPtr.reg); |
| 692 | return; |
| 693 | } |
| 694 | |
| 695 | // ------------------------ |
| 696 | // about ~22 cycles / pixel |
| 697 | Scratch scratches(registerFile()); |
| 698 | |
| 699 | int pixel= scratches.obtain(); |
| 700 | int d = scratches.obtain(); |
| 701 | int u = scratches.obtain(); |
| 702 | int k = scratches.obtain(); |
| 703 | int rt = scratches.obtain(); |
| 704 | int lb = scratches.obtain(); |
| 705 | |
| 706 | // RB -> U * V |
| 707 | |
| 708 | CONTEXT_LOAD(rt, generated_vars.rt); |
| 709 | CONTEXT_LOAD(lb, generated_vars.lb); |
| 710 | |
| 711 | int offset = pixel; |
| 712 | ADD(AL, 0, offset, lb, rt); |
| 713 | LDRB(AL, pixel, txPtr.reg, reg_scale_pre(offset)); |
| 714 | SMULBB(AL, u, U, V); |
| 715 | SMULBB(AL, d, pixel, u); |
| 716 | RSB(AL, 0, k, u, imm(1<<(FRAC_BITS*2))); |
| 717 | |
| 718 | // LB -> (1-U) * V |
| 719 | RSB(AL, 0, U, U, imm(1<<FRAC_BITS)); |
| 720 | LDRB(AL, pixel, txPtr.reg, reg_scale_pre(lb)); |
| 721 | SMULBB(AL, u, U, V); |
| 722 | SMLABB(AL, d, pixel, u, d); |
| 723 | SUB(AL, 0, k, k, u); |
| 724 | |
| 725 | // LT -> (1-U)*(1-V) |
| 726 | RSB(AL, 0, V, V, imm(1<<FRAC_BITS)); |
| 727 | LDRB(AL, pixel, txPtr.reg); |
| 728 | SMULBB(AL, u, U, V); |
| 729 | SMLABB(AL, d, pixel, u, d); |
| 730 | |
| 731 | // RT -> U*(1-V) |
| 732 | LDRB(AL, pixel, txPtr.reg, reg_scale_pre(rt)); |
| 733 | SUB(AL, 0, u, k, u); |
| 734 | SMLABB(AL, texel.reg, pixel, u, d); |
| 735 | |
| 736 | for (int i=0 ; i<4 ; i++) { |
| 737 | if (!texel.format.c[i].h) continue; |
| 738 | texel.format.c[i].h = FRAC_BITS*2+8; |
| 739 | texel.format.c[i].l = FRAC_BITS*2; // keeping 8 bits in enough |
| 740 | } |
| 741 | texel.format.size = 4; |
| 742 | texel.format.bitsPerPixel = 32; |
| 743 | texel.flags |= CLEAR_LO; |
| 744 | } |
| 745 | |
| 746 | void GGLAssembler::filter16( |
| 747 | const fragment_parts_t& parts, |
| 748 | pixel_t& texel, const texture_unit_t& tmu, |
| 749 | int U, int V, pointer_t& txPtr, |
| 750 | int FRAC_BITS) |
| 751 | { |
| 752 | // compute the mask |
| 753 | // XXX: it would be nice if the mask below could be computed |
| 754 | // automatically. |
| 755 | uint32_t mask = 0; |
| 756 | int shift = 0; |
| 757 | int prec = 0; |
| 758 | switch (tmu.format_idx) { |
| 759 | case GGL_PIXEL_FORMAT_RGB_565: |
| 760 | // source: 00000ggg.ggg00000 | rrrrr000.000bbbbb |
| 761 | // result: gggggggg.gggrrrrr | rrrrr0bb.bbbbbbbb |
| 762 | mask = 0x07E0F81F; |
| 763 | shift = 16; |
| 764 | prec = 5; |
| 765 | break; |
| 766 | case GGL_PIXEL_FORMAT_RGBA_4444: |
| 767 | // 0000,1111,0000,1111 | 0000,1111,0000,1111 |
| 768 | mask = 0x0F0F0F0F; |
| 769 | shift = 12; |
| 770 | prec = 4; |
| 771 | break; |
| 772 | case GGL_PIXEL_FORMAT_LA_88: |
| 773 | // 0000,0000,1111,1111 | 0000,0000,1111,1111 |
| 774 | // AALL -> 00AA | 00LL |
| 775 | mask = 0x00FF00FF; |
| 776 | shift = 8; |
| 777 | prec = 8; |
| 778 | break; |
| 779 | default: |
| 780 | // unsupported format, do something sensical... |
Steve Block | 01dda20 | 2012-01-06 14:13:42 +0000 | [diff] [blame] | 781 | ALOGE("Unsupported 16-bits texture format (%d)", tmu.format_idx); |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 782 | LDRH(AL, texel.reg, txPtr.reg); |
| 783 | return; |
| 784 | } |
| 785 | |
| 786 | const int adjust = FRAC_BITS*2 - prec; |
| 787 | const int round = 0; |
| 788 | |
| 789 | // update the texel format |
| 790 | texel.format.size = 4; |
| 791 | texel.format.bitsPerPixel = 32; |
| 792 | texel.flags |= CLEAR_HI|CLEAR_LO; |
| 793 | for (int i=0 ; i<4 ; i++) { |
| 794 | if (!texel.format.c[i].h) continue; |
| 795 | const uint32_t offset = (mask & tmu.format.mask(i)) ? 0 : shift; |
| 796 | texel.format.c[i].h = tmu.format.c[i].h + offset + prec; |
| 797 | texel.format.c[i].l = texel.format.c[i].h - (tmu.format.bits(i) + prec); |
| 798 | } |
| 799 | |
| 800 | // ------------------------ |
| 801 | // about ~40 cycles / pixel |
| 802 | Scratch scratches(registerFile()); |
| 803 | |
| 804 | int pixel= scratches.obtain(); |
| 805 | int d = scratches.obtain(); |
| 806 | int u = scratches.obtain(); |
| 807 | int k = scratches.obtain(); |
| 808 | |
| 809 | // RB -> U * V |
| 810 | int offset = pixel; |
| 811 | CONTEXT_LOAD(offset, generated_vars.rt); |
| 812 | CONTEXT_LOAD(u, generated_vars.lb); |
| 813 | ADD(AL, 0, offset, offset, u); |
| 814 | |
| 815 | LDRH(AL, pixel, txPtr.reg, reg_pre(offset)); |
| 816 | SMULBB(AL, u, U, V); |
| 817 | ORR(AL, 0, pixel, pixel, reg_imm(pixel, LSL, shift)); |
| 818 | build_and_immediate(pixel, pixel, mask, 32); |
| 819 | if (adjust) { |
| 820 | if (round) |
| 821 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 822 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 823 | } |
| 824 | MUL(AL, 0, d, pixel, u); |
| 825 | RSB(AL, 0, k, u, imm(1<<prec)); |
| 826 | |
| 827 | // LB -> (1-U) * V |
| 828 | CONTEXT_LOAD(offset, generated_vars.lb); |
| 829 | RSB(AL, 0, U, U, imm(1<<FRAC_BITS)); |
| 830 | LDRH(AL, pixel, txPtr.reg, reg_pre(offset)); |
| 831 | SMULBB(AL, u, U, V); |
| 832 | ORR(AL, 0, pixel, pixel, reg_imm(pixel, LSL, shift)); |
| 833 | build_and_immediate(pixel, pixel, mask, 32); |
| 834 | if (adjust) { |
| 835 | if (round) |
| 836 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 837 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 838 | } |
| 839 | MLA(AL, 0, d, pixel, u, d); |
| 840 | SUB(AL, 0, k, k, u); |
| 841 | |
| 842 | // LT -> (1-U)*(1-V) |
| 843 | RSB(AL, 0, V, V, imm(1<<FRAC_BITS)); |
| 844 | LDRH(AL, pixel, txPtr.reg); |
| 845 | SMULBB(AL, u, U, V); |
| 846 | ORR(AL, 0, pixel, pixel, reg_imm(pixel, LSL, shift)); |
| 847 | build_and_immediate(pixel, pixel, mask, 32); |
| 848 | if (adjust) { |
| 849 | if (round) |
| 850 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 851 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 852 | } |
| 853 | MLA(AL, 0, d, pixel, u, d); |
| 854 | |
| 855 | // RT -> U*(1-V) |
| 856 | CONTEXT_LOAD(offset, generated_vars.rt); |
| 857 | LDRH(AL, pixel, txPtr.reg, reg_pre(offset)); |
| 858 | SUB(AL, 0, u, k, u); |
| 859 | ORR(AL, 0, pixel, pixel, reg_imm(pixel, LSL, shift)); |
| 860 | build_and_immediate(pixel, pixel, mask, 32); |
| 861 | MLA(AL, 0, texel.reg, pixel, u, d); |
| 862 | } |
| 863 | |
| 864 | void GGLAssembler::filter24( |
| 865 | const fragment_parts_t& parts, |
| 866 | pixel_t& texel, const texture_unit_t& tmu, |
| 867 | int U, int V, pointer_t& txPtr, |
| 868 | int FRAC_BITS) |
| 869 | { |
| 870 | // not supported yet (currently disabled) |
| 871 | load(txPtr, texel, 0); |
| 872 | } |
| 873 | |
Martyn Capewell | 96dbb4f | 2009-12-07 13:59:59 +0000 | [diff] [blame] | 874 | #if __ARM_ARCH__ >= 6 |
| 875 | // ARMv6 version, using UXTB16, and scheduled for Cortex-A8 pipeline |
| 876 | void GGLAssembler::filter32( |
| 877 | const fragment_parts_t& parts, |
| 878 | pixel_t& texel, const texture_unit_t& tmu, |
| 879 | int U, int V, pointer_t& txPtr, |
| 880 | int FRAC_BITS) |
| 881 | { |
| 882 | const int adjust = FRAC_BITS*2 - 8; |
| 883 | const int round = 0; |
| 884 | const int prescale = 16 - adjust; |
| 885 | |
| 886 | Scratch scratches(registerFile()); |
| 887 | |
| 888 | int pixel= scratches.obtain(); |
| 889 | int dh = scratches.obtain(); |
| 890 | int u = scratches.obtain(); |
| 891 | int k = scratches.obtain(); |
| 892 | |
| 893 | int temp = scratches.obtain(); |
| 894 | int dl = scratches.obtain(); |
| 895 | |
| 896 | int offsetrt = scratches.obtain(); |
| 897 | int offsetlb = scratches.obtain(); |
| 898 | |
| 899 | int pixellb = offsetlb; |
| 900 | |
| 901 | // RB -> U * V |
| 902 | CONTEXT_LOAD(offsetrt, generated_vars.rt); |
| 903 | CONTEXT_LOAD(offsetlb, generated_vars.lb); |
| 904 | if(!round) { |
| 905 | MOV(AL, 0, U, reg_imm(U, LSL, prescale)); |
| 906 | } |
| 907 | ADD(AL, 0, u, offsetrt, offsetlb); |
| 908 | |
| 909 | LDR(AL, pixel, txPtr.reg, reg_scale_pre(u)); |
| 910 | if (round) { |
| 911 | SMULBB(AL, u, U, V); |
| 912 | RSB(AL, 0, U, U, imm(1<<FRAC_BITS)); |
| 913 | } else { |
| 914 | SMULWB(AL, u, U, V); |
| 915 | RSB(AL, 0, U, U, imm(1<<(FRAC_BITS+prescale))); |
| 916 | } |
| 917 | UXTB16(AL, temp, pixel, 0); |
| 918 | if (round) { |
| 919 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 920 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 921 | } |
| 922 | LDR(AL, pixellb, txPtr.reg, reg_scale_pre(offsetlb)); |
| 923 | MUL(AL, 0, dh, temp, u); |
| 924 | UXTB16(AL, temp, pixel, 8); |
| 925 | MUL(AL, 0, dl, temp, u); |
| 926 | RSB(AL, 0, k, u, imm(0x100)); |
| 927 | |
| 928 | // LB -> (1-U) * V |
| 929 | if (round) { |
| 930 | SMULBB(AL, u, U, V); |
| 931 | } else { |
| 932 | SMULWB(AL, u, U, V); |
| 933 | } |
| 934 | UXTB16(AL, temp, pixellb, 0); |
| 935 | if (round) { |
| 936 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 937 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 938 | } |
| 939 | MLA(AL, 0, dh, temp, u, dh); |
| 940 | UXTB16(AL, temp, pixellb, 8); |
| 941 | MLA(AL, 0, dl, temp, u, dl); |
| 942 | SUB(AL, 0, k, k, u); |
| 943 | |
| 944 | // LT -> (1-U)*(1-V) |
| 945 | RSB(AL, 0, V, V, imm(1<<FRAC_BITS)); |
| 946 | LDR(AL, pixel, txPtr.reg); |
| 947 | if (round) { |
| 948 | SMULBB(AL, u, U, V); |
| 949 | } else { |
| 950 | SMULWB(AL, u, U, V); |
| 951 | } |
| 952 | UXTB16(AL, temp, pixel, 0); |
| 953 | if (round) { |
| 954 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 955 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 956 | } |
| 957 | MLA(AL, 0, dh, temp, u, dh); |
| 958 | UXTB16(AL, temp, pixel, 8); |
| 959 | MLA(AL, 0, dl, temp, u, dl); |
| 960 | |
| 961 | // RT -> U*(1-V) |
| 962 | LDR(AL, pixel, txPtr.reg, reg_scale_pre(offsetrt)); |
| 963 | SUB(AL, 0, u, k, u); |
| 964 | UXTB16(AL, temp, pixel, 0); |
| 965 | MLA(AL, 0, dh, temp, u, dh); |
| 966 | UXTB16(AL, temp, pixel, 8); |
| 967 | MLA(AL, 0, dl, temp, u, dl); |
| 968 | |
| 969 | UXTB16(AL, dh, dh, 8); |
| 970 | UXTB16(AL, dl, dl, 8); |
| 971 | ORR(AL, 0, texel.reg, dh, reg_imm(dl, LSL, 8)); |
| 972 | } |
| 973 | #else |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 974 | void GGLAssembler::filter32( |
| 975 | const fragment_parts_t& parts, |
| 976 | pixel_t& texel, const texture_unit_t& tmu, |
| 977 | int U, int V, pointer_t& txPtr, |
| 978 | int FRAC_BITS) |
| 979 | { |
| 980 | const int adjust = FRAC_BITS*2 - 8; |
| 981 | const int round = 0; |
| 982 | |
| 983 | // ------------------------ |
| 984 | // about ~38 cycles / pixel |
| 985 | Scratch scratches(registerFile()); |
| 986 | |
| 987 | int pixel= scratches.obtain(); |
| 988 | int dh = scratches.obtain(); |
| 989 | int u = scratches.obtain(); |
| 990 | int k = scratches.obtain(); |
| 991 | |
| 992 | int temp = scratches.obtain(); |
| 993 | int dl = scratches.obtain(); |
| 994 | int mask = scratches.obtain(); |
| 995 | |
| 996 | MOV(AL, 0, mask, imm(0xFF)); |
| 997 | ORR(AL, 0, mask, mask, imm(0xFF0000)); |
| 998 | |
| 999 | // RB -> U * V |
| 1000 | int offset = pixel; |
| 1001 | CONTEXT_LOAD(offset, generated_vars.rt); |
| 1002 | CONTEXT_LOAD(u, generated_vars.lb); |
| 1003 | ADD(AL, 0, offset, offset, u); |
| 1004 | |
| 1005 | LDR(AL, pixel, txPtr.reg, reg_scale_pre(offset)); |
| 1006 | SMULBB(AL, u, U, V); |
| 1007 | AND(AL, 0, temp, mask, pixel); |
| 1008 | if (adjust) { |
| 1009 | if (round) |
| 1010 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 1011 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 1012 | } |
| 1013 | MUL(AL, 0, dh, temp, u); |
| 1014 | AND(AL, 0, temp, mask, reg_imm(pixel, LSR, 8)); |
| 1015 | MUL(AL, 0, dl, temp, u); |
| 1016 | RSB(AL, 0, k, u, imm(0x100)); |
| 1017 | |
| 1018 | // LB -> (1-U) * V |
| 1019 | CONTEXT_LOAD(offset, generated_vars.lb); |
| 1020 | RSB(AL, 0, U, U, imm(1<<FRAC_BITS)); |
| 1021 | LDR(AL, pixel, txPtr.reg, reg_scale_pre(offset)); |
| 1022 | SMULBB(AL, u, U, V); |
| 1023 | AND(AL, 0, temp, mask, pixel); |
| 1024 | if (adjust) { |
| 1025 | if (round) |
| 1026 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 1027 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 1028 | } |
| 1029 | MLA(AL, 0, dh, temp, u, dh); |
| 1030 | AND(AL, 0, temp, mask, reg_imm(pixel, LSR, 8)); |
| 1031 | MLA(AL, 0, dl, temp, u, dl); |
| 1032 | SUB(AL, 0, k, k, u); |
| 1033 | |
| 1034 | // LT -> (1-U)*(1-V) |
| 1035 | RSB(AL, 0, V, V, imm(1<<FRAC_BITS)); |
| 1036 | LDR(AL, pixel, txPtr.reg); |
| 1037 | SMULBB(AL, u, U, V); |
| 1038 | AND(AL, 0, temp, mask, pixel); |
| 1039 | if (adjust) { |
| 1040 | if (round) |
| 1041 | ADD(AL, 0, u, u, imm(1<<(adjust-1))); |
| 1042 | MOV(AL, 0, u, reg_imm(u, LSR, adjust)); |
| 1043 | } |
| 1044 | MLA(AL, 0, dh, temp, u, dh); |
| 1045 | AND(AL, 0, temp, mask, reg_imm(pixel, LSR, 8)); |
| 1046 | MLA(AL, 0, dl, temp, u, dl); |
| 1047 | |
| 1048 | // RT -> U*(1-V) |
| 1049 | CONTEXT_LOAD(offset, generated_vars.rt); |
| 1050 | LDR(AL, pixel, txPtr.reg, reg_scale_pre(offset)); |
| 1051 | SUB(AL, 0, u, k, u); |
| 1052 | AND(AL, 0, temp, mask, pixel); |
| 1053 | MLA(AL, 0, dh, temp, u, dh); |
| 1054 | AND(AL, 0, temp, mask, reg_imm(pixel, LSR, 8)); |
| 1055 | MLA(AL, 0, dl, temp, u, dl); |
| 1056 | |
| 1057 | AND(AL, 0, dh, mask, reg_imm(dh, LSR, 8)); |
| 1058 | AND(AL, 0, dl, dl, reg_imm(mask, LSL, 8)); |
| 1059 | ORR(AL, 0, texel.reg, dh, dl); |
| 1060 | } |
Martyn Capewell | 96dbb4f | 2009-12-07 13:59:59 +0000 | [diff] [blame] | 1061 | #endif |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1062 | |
| 1063 | void GGLAssembler::build_texture_environment( |
| 1064 | component_t& fragment, |
| 1065 | const fragment_parts_t& parts, |
| 1066 | int component, |
| 1067 | Scratch& regs) |
| 1068 | { |
| 1069 | const uint32_t component_mask = 1<<component; |
| 1070 | const bool multiTexture = mTextureMachine.activeUnits > 1; |
| 1071 | for (int i=0 ; i<GGL_TEXTURE_UNIT_COUNT ; i++) { |
| 1072 | texture_unit_t& tmu = mTextureMachine.tmu[i]; |
| 1073 | |
| 1074 | if (tmu.mask & component_mask) { |
| 1075 | // replace or modulate with this texture |
| 1076 | if ((tmu.replaced & component_mask) == 0) { |
| 1077 | // not replaced by a later tmu... |
| 1078 | |
| 1079 | Scratch scratches(registerFile()); |
| 1080 | pixel_t texel(parts.texel[i]); |
| 1081 | if (multiTexture && |
| 1082 | tmu.swrap == GGL_NEEDS_WRAP_11 && |
| 1083 | tmu.twrap == GGL_NEEDS_WRAP_11) |
| 1084 | { |
| 1085 | texel.reg = scratches.obtain(); |
| 1086 | texel.flags |= CORRUPTIBLE; |
| 1087 | comment("fetch texel (multitexture 1:1)"); |
| 1088 | load(parts.coords[i].ptr, texel, WRITE_BACK); |
| 1089 | } |
| 1090 | |
| 1091 | component_t incoming(fragment); |
| 1092 | modify(fragment, regs); |
| 1093 | |
| 1094 | switch (tmu.env) { |
| 1095 | case GGL_REPLACE: |
| 1096 | extract(fragment, texel, component); |
| 1097 | break; |
| 1098 | case GGL_MODULATE: |
| 1099 | modulate(fragment, incoming, texel, component); |
| 1100 | break; |
| 1101 | case GGL_DECAL: |
| 1102 | decal(fragment, incoming, texel, component); |
| 1103 | break; |
| 1104 | case GGL_BLEND: |
| 1105 | blend(fragment, incoming, texel, component, i); |
| 1106 | break; |
The Android Open Source Project | 35237d1 | 2008-12-17 18:08:08 -0800 | [diff] [blame] | 1107 | case GGL_ADD: |
| 1108 | add(fragment, incoming, texel, component); |
| 1109 | break; |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1110 | } |
| 1111 | } |
| 1112 | } |
| 1113 | } |
| 1114 | } |
| 1115 | |
| 1116 | // --------------------------------------------------------------------------- |
| 1117 | |
| 1118 | void GGLAssembler::wrapping( |
| 1119 | int d, |
| 1120 | int coord, int size, |
| 1121 | int tx_wrap, int tx_linear) |
| 1122 | { |
| 1123 | // notes: |
| 1124 | // if tx_linear is set, we need 4 extra bits of precision on the result |
| 1125 | // SMULL/UMULL is 3 cycles |
| 1126 | Scratch scratches(registerFile()); |
| 1127 | int c = coord; |
| 1128 | if (tx_wrap == GGL_NEEDS_WRAP_REPEAT) { |
| 1129 | // UMULL takes 4 cycles (interlocked), and we can get away with |
| 1130 | // 2 cycles using SMULWB, but we're loosing 16 bits of precision |
| 1131 | // out of 32 (this is not a problem because the iterator keeps |
| 1132 | // its full precision) |
| 1133 | // UMULL(AL, 0, size, d, c, size); |
| 1134 | // note: we can't use SMULTB because it's signed. |
| 1135 | MOV(AL, 0, d, reg_imm(c, LSR, 16-tx_linear)); |
| 1136 | SMULWB(AL, d, d, size); |
| 1137 | } else if (tx_wrap == GGL_NEEDS_WRAP_CLAMP_TO_EDGE) { |
| 1138 | if (tx_linear) { |
| 1139 | // 1 cycle |
| 1140 | MOV(AL, 0, d, reg_imm(coord, ASR, 16-tx_linear)); |
| 1141 | } else { |
| 1142 | // 4 cycles (common case) |
| 1143 | MOV(AL, 0, d, reg_imm(coord, ASR, 16)); |
| 1144 | BIC(AL, 0, d, d, reg_imm(d, ASR, 31)); |
| 1145 | CMP(AL, d, size); |
| 1146 | SUB(GE, 0, d, size, imm(1)); |
| 1147 | } |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | // --------------------------------------------------------------------------- |
| 1152 | |
| 1153 | void GGLAssembler::modulate( |
| 1154 | component_t& dest, |
| 1155 | const component_t& incoming, |
| 1156 | const pixel_t& incomingTexel, int component) |
| 1157 | { |
| 1158 | Scratch locals(registerFile()); |
| 1159 | integer_t texel(locals.obtain(), 32, CORRUPTIBLE); |
| 1160 | extract(texel, incomingTexel, component); |
| 1161 | |
| 1162 | const int Nt = texel.size(); |
| 1163 | // Nt should always be less than 10 bits because it comes |
| 1164 | // from the TMU. |
| 1165 | |
| 1166 | int Ni = incoming.size(); |
| 1167 | // Ni could be big because it comes from previous MODULATEs |
| 1168 | |
| 1169 | if (Nt == 1) { |
| 1170 | // texel acts as a bit-mask |
| 1171 | // dest = incoming & ((texel << incoming.h)-texel) |
| 1172 | RSB(AL, 0, dest.reg, texel.reg, reg_imm(texel.reg, LSL, incoming.h)); |
| 1173 | AND(AL, 0, dest.reg, dest.reg, incoming.reg); |
| 1174 | dest.l = incoming.l; |
| 1175 | dest.h = incoming.h; |
| 1176 | dest.flags |= (incoming.flags & CLEAR_LO); |
| 1177 | } else if (Ni == 1) { |
| 1178 | MOV(AL, 0, dest.reg, reg_imm(incoming.reg, LSL, 31-incoming.h)); |
| 1179 | AND(AL, 0, dest.reg, texel.reg, reg_imm(dest.reg, ASR, 31)); |
| 1180 | dest.l = 0; |
| 1181 | dest.h = Nt; |
| 1182 | } else { |
| 1183 | int inReg = incoming.reg; |
| 1184 | int shift = incoming.l; |
| 1185 | if ((Nt + Ni) > 32) { |
| 1186 | // we will overflow, reduce the precision of Ni to 8 bits |
| 1187 | // (Note Nt cannot be more than 10 bits which happens with |
| 1188 | // 565 textures and GGL_LINEAR) |
| 1189 | shift += Ni-8; |
| 1190 | Ni = 8; |
| 1191 | } |
| 1192 | |
| 1193 | // modulate by the component with the lowest precision |
| 1194 | if (Nt >= Ni) { |
| 1195 | if (shift) { |
| 1196 | // XXX: we should be able to avoid this shift |
| 1197 | // when shift==16 && Nt<16 && Ni<16, in which |
| 1198 | // we could use SMULBT below. |
| 1199 | MOV(AL, 0, dest.reg, reg_imm(inReg, LSR, shift)); |
| 1200 | inReg = dest.reg; |
| 1201 | shift = 0; |
| 1202 | } |
| 1203 | // operation: (Cf*Ct)/((1<<Ni)-1) |
| 1204 | // approximated with: Cf*(Ct + Ct>>(Ni-1))>>Ni |
| 1205 | // this operation doesn't change texel's size |
| 1206 | ADD(AL, 0, dest.reg, inReg, reg_imm(inReg, LSR, Ni-1)); |
| 1207 | if (Nt<16 && Ni<16) SMULBB(AL, dest.reg, texel.reg, dest.reg); |
| 1208 | else MUL(AL, 0, dest.reg, texel.reg, dest.reg); |
| 1209 | dest.l = Ni; |
| 1210 | dest.h = Nt + Ni; |
| 1211 | } else { |
| 1212 | if (shift && (shift != 16)) { |
| 1213 | // if shift==16, we can use 16-bits mul instructions later |
| 1214 | MOV(AL, 0, dest.reg, reg_imm(inReg, LSR, shift)); |
| 1215 | inReg = dest.reg; |
| 1216 | shift = 0; |
| 1217 | } |
| 1218 | // operation: (Cf*Ct)/((1<<Nt)-1) |
| 1219 | // approximated with: Ct*(Cf + Cf>>(Nt-1))>>Nt |
| 1220 | // this operation doesn't change incoming's size |
| 1221 | Scratch scratches(registerFile()); |
| 1222 | int t = (texel.flags & CORRUPTIBLE) ? texel.reg : dest.reg; |
| 1223 | if (t == inReg) |
| 1224 | t = scratches.obtain(); |
| 1225 | ADD(AL, 0, t, texel.reg, reg_imm(texel.reg, LSR, Nt-1)); |
| 1226 | if (Nt<16 && Ni<16) { |
| 1227 | if (shift==16) SMULBT(AL, dest.reg, t, inReg); |
| 1228 | else SMULBB(AL, dest.reg, t, inReg); |
| 1229 | } else MUL(AL, 0, dest.reg, t, inReg); |
| 1230 | dest.l = Nt; |
| 1231 | dest.h = Nt + Ni; |
| 1232 | } |
| 1233 | |
| 1234 | // low bits are not valid |
| 1235 | dest.flags |= CLEAR_LO; |
| 1236 | |
| 1237 | // no need to keep more than 8 bits/component |
| 1238 | if (dest.size() > 8) |
| 1239 | dest.l = dest.h-8; |
| 1240 | } |
| 1241 | } |
| 1242 | |
| 1243 | void GGLAssembler::decal( |
| 1244 | component_t& dest, |
| 1245 | const component_t& incoming, |
| 1246 | const pixel_t& incomingTexel, int component) |
| 1247 | { |
| 1248 | // RGBA: |
| 1249 | // Cv = Cf*(1 - At) + Ct*At = Cf + (Ct - Cf)*At |
| 1250 | // Av = Af |
| 1251 | Scratch locals(registerFile()); |
| 1252 | integer_t texel(locals.obtain(), 32, CORRUPTIBLE); |
| 1253 | integer_t factor(locals.obtain(), 32, CORRUPTIBLE); |
| 1254 | extract(texel, incomingTexel, component); |
| 1255 | extract(factor, incomingTexel, GGLFormat::ALPHA); |
| 1256 | |
| 1257 | // no need to keep more than 8-bits for decal |
| 1258 | int Ni = incoming.size(); |
| 1259 | int shift = incoming.l; |
| 1260 | if (Ni > 8) { |
| 1261 | shift += Ni-8; |
| 1262 | Ni = 8; |
| 1263 | } |
| 1264 | integer_t incomingNorm(incoming.reg, Ni, incoming.flags); |
| 1265 | if (shift) { |
| 1266 | MOV(AL, 0, dest.reg, reg_imm(incomingNorm.reg, LSR, shift)); |
| 1267 | incomingNorm.reg = dest.reg; |
| 1268 | incomingNorm.flags |= CORRUPTIBLE; |
| 1269 | } |
| 1270 | ADD(AL, 0, factor.reg, factor.reg, reg_imm(factor.reg, LSR, factor.s-1)); |
| 1271 | build_blendOneMinusFF(dest, factor, incomingNorm, texel); |
| 1272 | } |
| 1273 | |
| 1274 | void GGLAssembler::blend( |
| 1275 | component_t& dest, |
| 1276 | const component_t& incoming, |
| 1277 | const pixel_t& incomingTexel, int component, int tmu) |
| 1278 | { |
| 1279 | // RGBA: |
| 1280 | // Cv = (1 - Ct)*Cf + Ct*Cc = Cf + (Cc - Cf)*Ct |
| 1281 | // Av = At*Af |
| 1282 | |
| 1283 | if (component == GGLFormat::ALPHA) { |
| 1284 | modulate(dest, incoming, incomingTexel, component); |
| 1285 | return; |
| 1286 | } |
| 1287 | |
| 1288 | Scratch locals(registerFile()); |
| 1289 | integer_t color(locals.obtain(), 8, CORRUPTIBLE); |
| 1290 | integer_t factor(locals.obtain(), 32, CORRUPTIBLE); |
| 1291 | LDRB(AL, color.reg, mBuilderContext.Rctx, |
| 1292 | immed12_pre(GGL_OFFSETOF(state.texture[tmu].env_color[component]))); |
| 1293 | extract(factor, incomingTexel, component); |
| 1294 | |
| 1295 | // no need to keep more than 8-bits for blend |
| 1296 | int Ni = incoming.size(); |
| 1297 | int shift = incoming.l; |
| 1298 | if (Ni > 8) { |
| 1299 | shift += Ni-8; |
| 1300 | Ni = 8; |
| 1301 | } |
| 1302 | integer_t incomingNorm(incoming.reg, Ni, incoming.flags); |
| 1303 | if (shift) { |
| 1304 | MOV(AL, 0, dest.reg, reg_imm(incomingNorm.reg, LSR, shift)); |
| 1305 | incomingNorm.reg = dest.reg; |
| 1306 | incomingNorm.flags |= CORRUPTIBLE; |
| 1307 | } |
| 1308 | ADD(AL, 0, factor.reg, factor.reg, reg_imm(factor.reg, LSR, factor.s-1)); |
| 1309 | build_blendOneMinusFF(dest, factor, incomingNorm, color); |
| 1310 | } |
| 1311 | |
The Android Open Source Project | 35237d1 | 2008-12-17 18:08:08 -0800 | [diff] [blame] | 1312 | void GGLAssembler::add( |
| 1313 | component_t& dest, |
| 1314 | const component_t& incoming, |
| 1315 | const pixel_t& incomingTexel, int component) |
| 1316 | { |
| 1317 | // RGBA: |
| 1318 | // Cv = Cf + Ct; |
| 1319 | Scratch locals(registerFile()); |
| 1320 | |
| 1321 | component_t incomingTemp(incoming); |
| 1322 | |
| 1323 | // use "dest" as a temporary for extracting the texel, unless "dest" |
| 1324 | // overlaps "incoming". |
| 1325 | integer_t texel(dest.reg, 32, CORRUPTIBLE); |
| 1326 | if (dest.reg == incomingTemp.reg) |
| 1327 | texel.reg = locals.obtain(); |
| 1328 | extract(texel, incomingTexel, component); |
| 1329 | |
| 1330 | if (texel.s < incomingTemp.size()) { |
| 1331 | expand(texel, texel, incomingTemp.size()); |
| 1332 | } else if (texel.s > incomingTemp.size()) { |
| 1333 | if (incomingTemp.flags & CORRUPTIBLE) { |
| 1334 | expand(incomingTemp, incomingTemp, texel.s); |
| 1335 | } else { |
| 1336 | incomingTemp.reg = locals.obtain(); |
| 1337 | expand(incomingTemp, incoming, texel.s); |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | if (incomingTemp.l) { |
| 1342 | ADD(AL, 0, dest.reg, texel.reg, |
| 1343 | reg_imm(incomingTemp.reg, LSR, incomingTemp.l)); |
| 1344 | } else { |
| 1345 | ADD(AL, 0, dest.reg, texel.reg, incomingTemp.reg); |
| 1346 | } |
| 1347 | dest.l = 0; |
| 1348 | dest.h = texel.size(); |
| 1349 | component_sat(dest); |
| 1350 | } |
| 1351 | |
The Android Open Source Project | 4f6e8d7 | 2008-10-21 07:00:00 -0700 | [diff] [blame] | 1352 | // ---------------------------------------------------------------------------- |
| 1353 | |
| 1354 | }; // namespace android |
| 1355 | |