José Fonseca | f311bac | 2009-08-23 14:25:31 +0100 | [diff] [blame^] | 1 | /************************************************************************** |
| 2 | * |
| 3 | * Copyright 2009 VMware, Inc. |
| 4 | * All Rights Reserved. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the |
| 8 | * "Software"), to deal in the Software without restriction, including |
| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
| 11 | * permit persons to whom the Software is furnished to do so, subject to |
| 12 | * the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice (including the |
| 15 | * next paragraph) shall be included in all copies or substantial portions |
| 16 | * of the Software. |
| 17 | * |
| 18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
| 19 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 20 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. |
| 21 | * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR |
| 22 | * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, |
| 23 | * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE |
| 24 | * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 25 | * |
| 26 | **************************************************************************/ |
| 27 | |
| 28 | |
| 29 | #include "util/u_format.h" |
| 30 | |
| 31 | #include "lp_bld_format.h" |
| 32 | |
| 33 | |
| 34 | LLVMValueRef |
| 35 | lp_build_unpack_rgba(LLVMBuilderRef builder, |
| 36 | enum pipe_format format, |
| 37 | LLVMValueRef packed) |
| 38 | { |
| 39 | const struct util_format_description *desc; |
| 40 | LLVMTypeRef type; |
| 41 | LLVMValueRef shifted, casted, scaled, masked; |
| 42 | LLVMValueRef shifts[4]; |
| 43 | LLVMValueRef masks[4]; |
| 44 | LLVMValueRef scales[4]; |
| 45 | LLVMValueRef swizzles[4]; |
| 46 | LLVMValueRef aux[4]; |
| 47 | bool normalized; |
| 48 | int empty_channel; |
| 49 | unsigned shift; |
| 50 | unsigned i; |
| 51 | |
| 52 | desc = util_format_description(format); |
| 53 | |
| 54 | /* FIXME: Support more formats */ |
| 55 | assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); |
| 56 | assert(desc->block.width == 1); |
| 57 | assert(desc->block.height == 1); |
| 58 | assert(desc->block.bits <= 32); |
| 59 | |
| 60 | type = LLVMIntType(desc->block.bits); |
| 61 | |
| 62 | /* Do the intermediate integer computations with 32bit integers since it |
| 63 | * matches floating point size */ |
| 64 | if (desc->block.bits < 32) |
| 65 | packed = LLVMBuildZExt(builder, packed, LLVMInt32Type(), ""); |
| 66 | |
| 67 | /* Broadcast the packed value to all four channels */ |
| 68 | packed = LLVMBuildInsertElement(builder, |
| 69 | LLVMGetUndef(LLVMVectorType(LLVMInt32Type(), 4)), |
| 70 | packed, |
| 71 | LLVMConstNull(LLVMInt32Type()), |
| 72 | ""); |
| 73 | packed = LLVMBuildShuffleVector(builder, |
| 74 | packed, |
| 75 | LLVMGetUndef(LLVMVectorType(LLVMInt32Type(), 4)), |
| 76 | LLVMConstNull(LLVMVectorType(LLVMInt32Type(), 4)), |
| 77 | ""); |
| 78 | |
| 79 | /* Initialize vector constants */ |
| 80 | normalized = FALSE; |
| 81 | empty_channel = -1; |
| 82 | shift = 0; |
| 83 | for (i = 0; i < 4; ++i) { |
| 84 | unsigned bits = desc->channel[i].size; |
| 85 | |
| 86 | if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) { |
| 87 | shifts[i] = LLVMGetUndef(LLVMInt32Type()); |
| 88 | masks[i] = LLVMConstNull(LLVMInt32Type()); |
| 89 | scales[i] = LLVMConstNull(LLVMFloatType()); |
| 90 | empty_channel = i; |
| 91 | } |
| 92 | else { |
| 93 | unsigned mask = (1 << bits) - 1; |
| 94 | |
| 95 | assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED); |
| 96 | assert(bits < 32); |
| 97 | |
| 98 | shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0); |
| 99 | masks[i] = LLVMConstInt(LLVMInt32Type(), mask, 0); |
| 100 | |
| 101 | if (desc->channel[i].normalized) { |
| 102 | scales[i] = LLVMConstReal(LLVMFloatType(), 1.0/mask); |
| 103 | normalized = TRUE; |
| 104 | } |
| 105 | else |
| 106 | scales[i] = LLVMConstReal(LLVMFloatType(), 1.0); |
| 107 | } |
| 108 | |
| 109 | shift += bits; |
| 110 | } |
| 111 | |
| 112 | shifted = LLVMBuildLShr(builder, packed, LLVMConstVector(shifts, 4), ""); |
| 113 | masked = LLVMBuildAnd(builder, shifted, LLVMConstVector(masks, 4), ""); |
| 114 | // UIToFP can't be expressed in SSE2 |
| 115 | casted = LLVMBuildSIToFP(builder, masked, LLVMVectorType(LLVMFloatType(), 4), ""); |
| 116 | |
| 117 | if (normalized) |
| 118 | scaled = LLVMBuildMul(builder, casted, LLVMConstVector(scales, 4), ""); |
| 119 | else |
| 120 | scaled = casted; |
| 121 | |
| 122 | for (i = 0; i < 4; ++i) |
| 123 | aux[i] = LLVMGetUndef(LLVMFloatType()); |
| 124 | |
| 125 | for (i = 0; i < 4; ++i) { |
| 126 | enum util_format_swizzle swizzle = desc->swizzle[i]; |
| 127 | |
| 128 | switch (swizzle) { |
| 129 | case UTIL_FORMAT_SWIZZLE_X: |
| 130 | case UTIL_FORMAT_SWIZZLE_Y: |
| 131 | case UTIL_FORMAT_SWIZZLE_Z: |
| 132 | case UTIL_FORMAT_SWIZZLE_W: |
| 133 | swizzles[i] = LLVMConstInt(LLVMInt32Type(), swizzle, 0); |
| 134 | break; |
| 135 | case UTIL_FORMAT_SWIZZLE_0: |
| 136 | assert(empty_channel >= 0); |
| 137 | swizzles[i] = LLVMConstInt(LLVMInt32Type(), empty_channel, 0); |
| 138 | break; |
| 139 | case UTIL_FORMAT_SWIZZLE_1: |
| 140 | swizzles[i] = LLVMConstInt(LLVMInt32Type(), 4, 0); |
| 141 | aux[0] = LLVMConstReal(LLVMFloatType(), 1.0); |
| 142 | break; |
| 143 | case UTIL_FORMAT_SWIZZLE_NONE: |
| 144 | swizzles[i] = LLVMGetUndef(LLVMFloatType()); |
| 145 | assert(0); |
| 146 | break; |
| 147 | } |
| 148 | } |
| 149 | |
| 150 | return LLVMBuildShuffleVector(builder, scaled, LLVMConstVector(aux, 4), LLVMConstVector(swizzles, 4), ""); |
| 151 | } |
| 152 | |
| 153 | |
| 154 | LLVMValueRef |
| 155 | lp_build_pack_rgba(LLVMBuilderRef builder, |
| 156 | enum pipe_format format, |
| 157 | LLVMValueRef rgba) |
| 158 | { |
| 159 | const struct util_format_description *desc; |
| 160 | LLVMTypeRef type; |
| 161 | LLVMValueRef packed = NULL; |
| 162 | LLVMValueRef swizzles[4]; |
| 163 | LLVMValueRef shifted, casted, scaled, unswizzled; |
| 164 | LLVMValueRef shifts[4]; |
| 165 | LLVMValueRef scales[4]; |
| 166 | bool normalized; |
| 167 | unsigned shift; |
| 168 | unsigned i, j; |
| 169 | |
| 170 | desc = util_format_description(format); |
| 171 | |
| 172 | assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); |
| 173 | assert(desc->block.width == 1); |
| 174 | assert(desc->block.height == 1); |
| 175 | |
| 176 | type = LLVMIntType(desc->block.bits); |
| 177 | |
| 178 | /* Unswizzle the color components into the source vector. */ |
| 179 | for (i = 0; i < 4; ++i) { |
| 180 | for (j = 0; j < 4; ++j) { |
| 181 | if (desc->swizzle[j] == i) |
| 182 | break; |
| 183 | } |
| 184 | if (j < 4) |
| 185 | swizzles[i] = LLVMConstInt(LLVMInt32Type(), j, 0); |
| 186 | else |
| 187 | swizzles[i] = LLVMGetUndef(LLVMInt32Type()); |
| 188 | } |
| 189 | |
| 190 | unswizzled = LLVMBuildShuffleVector(builder, rgba, |
| 191 | LLVMGetUndef(LLVMVectorType(LLVMFloatType(), 4)), |
| 192 | LLVMConstVector(swizzles, 4), ""); |
| 193 | |
| 194 | normalized = FALSE; |
| 195 | shift = 0; |
| 196 | for (i = 0; i < 4; ++i) { |
| 197 | unsigned bits = desc->channel[i].size; |
| 198 | |
| 199 | if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) { |
| 200 | shifts[i] = LLVMGetUndef(LLVMInt32Type()); |
| 201 | scales[i] = LLVMGetUndef(LLVMFloatType()); |
| 202 | } |
| 203 | else { |
| 204 | unsigned mask = (1 << bits) - 1; |
| 205 | |
| 206 | assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED); |
| 207 | assert(bits < 32); |
| 208 | |
| 209 | shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0); |
| 210 | |
| 211 | if (desc->channel[i].normalized) { |
| 212 | scales[i] = LLVMConstReal(LLVMFloatType(), mask); |
| 213 | normalized = TRUE; |
| 214 | } |
| 215 | else |
| 216 | scales[i] = LLVMConstReal(LLVMFloatType(), 1.0); |
| 217 | } |
| 218 | |
| 219 | shift += bits; |
| 220 | } |
| 221 | |
| 222 | if (normalized) |
| 223 | scaled = LLVMBuildMul(builder, unswizzled, LLVMConstVector(scales, 4), ""); |
| 224 | else |
| 225 | scaled = unswizzled; |
| 226 | |
| 227 | casted = LLVMBuildFPToSI(builder, scaled, LLVMVectorType(LLVMInt32Type(), 4), ""); |
| 228 | |
| 229 | shifted = LLVMBuildShl(builder, casted, LLVMConstVector(shifts, 4), ""); |
| 230 | |
| 231 | /* Bitwise or all components */ |
| 232 | for (i = 0; i < 4; ++i) { |
| 233 | if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED) { |
| 234 | LLVMValueRef component = LLVMBuildExtractElement(builder, shifted, LLVMConstInt(LLVMInt32Type(), i, 0), ""); |
| 235 | if (packed) |
| 236 | packed = LLVMBuildOr(builder, packed, component, ""); |
| 237 | else |
| 238 | packed = component; |
| 239 | } |
| 240 | } |
| 241 | |
| 242 | if (!packed) |
| 243 | packed = LLVMGetUndef(LLVMInt32Type()); |
| 244 | |
| 245 | if (desc->block.bits < 32) |
| 246 | packed = LLVMBuildTrunc(builder, packed, type, ""); |
| 247 | |
| 248 | return packed; |
| 249 | } |
| 250 | |
| 251 | |
| 252 | LLVMValueRef |
| 253 | lp_build_load_rgba(LLVMBuilderRef builder, |
| 254 | enum pipe_format format, |
| 255 | LLVMValueRef ptr) |
| 256 | { |
| 257 | const struct util_format_description *desc; |
| 258 | LLVMTypeRef type; |
| 259 | LLVMValueRef packed; |
| 260 | |
| 261 | desc = util_format_description(format); |
| 262 | |
| 263 | /* FIXME: Support more formats */ |
| 264 | assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); |
| 265 | assert(desc->block.width == 1); |
| 266 | assert(desc->block.height == 1); |
| 267 | assert(desc->block.bits <= 32); |
| 268 | |
| 269 | type = LLVMIntType(desc->block.bits); |
| 270 | |
| 271 | ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), ""); |
| 272 | |
| 273 | packed = LLVMBuildLoad(builder, ptr, ""); |
| 274 | |
| 275 | return lp_build_unpack_rgba(builder, format, packed); |
| 276 | } |
| 277 | |
| 278 | |
| 279 | void |
| 280 | lp_build_store_rgba(LLVMBuilderRef builder, |
| 281 | enum pipe_format format, |
| 282 | LLVMValueRef ptr, |
| 283 | LLVMValueRef rgba) |
| 284 | { |
| 285 | const struct util_format_description *desc; |
| 286 | LLVMTypeRef type; |
| 287 | LLVMValueRef packed; |
| 288 | |
| 289 | desc = util_format_description(format); |
| 290 | |
| 291 | assert(desc->layout == UTIL_FORMAT_LAYOUT_ARITH); |
| 292 | assert(desc->block.width == 1); |
| 293 | assert(desc->block.height == 1); |
| 294 | |
| 295 | type = LLVMIntType(desc->block.bits); |
| 296 | |
| 297 | packed = lp_build_pack_rgba(builder, format, rgba); |
| 298 | |
| 299 | ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), ""); |
| 300 | |
| 301 | LLVMBuildStore(builder, packed, ptr); |
| 302 | } |
| 303 | |