1 /* 2 * Copyright (C) 2008 Nicolai Haehnle. 3 * 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining 7 * a 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, sublicense, 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 16 * portions of the Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 19 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 21 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE 22 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 23 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 24 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 25 * 26 */ 27 28 /** 29 * @file 30 * Utilities to deal with the somewhat odd restriction on R300 fragment 31 * program swizzles. 32 */ 33 34 #include "r300_fragprog_swizzle.h" 35 36 #include <stdio.h> 37 38 #include "r300_reg.h" 39 #include "radeon_compiler.h" 40 41 #define MAKE_SWZ3(x, y, z) (RC_MAKE_SWIZZLE(RC_SWIZZLE_##x, RC_SWIZZLE_##y, RC_SWIZZLE_##z, RC_SWIZZLE_ZERO)) 42 43 struct swizzle_data { 44 unsigned int hash; /**< swizzle value this matches */ 45 unsigned int base; /**< base value for hw swizzle */ 46 unsigned int stride; /**< difference in base between arg0/1/2 */ 47 unsigned int srcp_stride; /**< difference in base between arg0/scrp */ 48 }; 49 50 static const struct swizzle_data native_swizzles[] = { 51 {MAKE_SWZ3(X, Y, Z), R300_ALU_ARGC_SRC0C_XYZ, 4, 15}, 52 {MAKE_SWZ3(X, X, X), R300_ALU_ARGC_SRC0C_XXX, 4, 15}, 53 {MAKE_SWZ3(Y, Y, Y), R300_ALU_ARGC_SRC0C_YYY, 4, 15}, 54 {MAKE_SWZ3(Z, Z, Z), R300_ALU_ARGC_SRC0C_ZZZ, 4, 15}, 55 {MAKE_SWZ3(W, W, W), R300_ALU_ARGC_SRC0A, 1, 7}, 56 {MAKE_SWZ3(Y, Z, X), R300_ALU_ARGC_SRC0C_YZX, 1, 0}, 57 {MAKE_SWZ3(Z, X, Y), R300_ALU_ARGC_SRC0C_ZXY, 1, 0}, 58 {MAKE_SWZ3(W, Z, Y), R300_ALU_ARGC_SRC0CA_WZY, 1, 0}, 59 {MAKE_SWZ3(ONE, ONE, ONE), R300_ALU_ARGC_ONE, 0, 0}, 60 {MAKE_SWZ3(ZERO, ZERO, ZERO), R300_ALU_ARGC_ZERO, 0, 0}, 61 {MAKE_SWZ3(HALF, HALF, HALF), R300_ALU_ARGC_HALF, 0, 0} 62 }; 63 64 static const int num_native_swizzles = sizeof(native_swizzles)/sizeof(native_swizzles[0]); 65 66 /** 67 * Find a native RGB swizzle that matches the given swizzle. 68 * Returns 0 if none found. 69 */ 70 static const struct swizzle_data* lookup_native_swizzle(unsigned int swizzle) 71 { 72 int i, comp; 73 74 for(i = 0; i < num_native_swizzles; ++i) { 75 const struct swizzle_data* sd = &native_swizzles[i]; 76 for(comp = 0; comp < 3; ++comp) { 77 unsigned int swz = GET_SWZ(swizzle, comp); 78 if (swz == RC_SWIZZLE_UNUSED) 79 continue; 80 if (swz != GET_SWZ(sd->hash, comp)) 81 break; 82 } 83 if (comp == 3) 84 return sd; 85 } 86 87 return 0; 88 } 89 90 /** 91 * Determines if the given swizzle is valid for r300/r400. In most situations 92 * it is better to use r300_swizzle_is_native() which can be accesed via 93 * struct radeon_compiler *c; c->SwizzleCaps->IsNative(). 94 */ 95 int r300_swizzle_is_native_basic(unsigned int swizzle) 96 { 97 if(lookup_native_swizzle(swizzle)) 98 return 1; 99 else 100 return 0; 101 } 102 103 /** 104 * Check whether the given instruction supports the swizzle and negate 105 * combinations in the given source register. 106 */ 107 static int r300_swizzle_is_native(rc_opcode opcode, struct rc_src_register reg) 108 { 109 const struct swizzle_data* sd; 110 unsigned int relevant; 111 int j; 112 113 if (opcode == RC_OPCODE_KIL || 114 opcode == RC_OPCODE_TEX || 115 opcode == RC_OPCODE_TXB || 116 opcode == RC_OPCODE_TXP) { 117 if (reg.Abs || reg.Negate) 118 return 0; 119 120 for(j = 0; j < 4; ++j) { 121 unsigned int swz = GET_SWZ(reg.Swizzle, j); 122 if (swz == RC_SWIZZLE_UNUSED) 123 continue; 124 if (swz != j) 125 return 0; 126 } 127 128 return 1; 129 } 130 131 relevant = 0; 132 133 for(j = 0; j < 3; ++j) 134 if (GET_SWZ(reg.Swizzle, j) != RC_SWIZZLE_UNUSED) 135 relevant |= 1 << j; 136 137 if ((reg.Negate & relevant) && ((reg.Negate & relevant) != relevant)) 138 return 0; 139 140 sd = lookup_native_swizzle(reg.Swizzle); 141 if (!sd || (reg.File == RC_FILE_PRESUB && sd->srcp_stride == 0)) 142 return 0; 143 144 return 1; 145 } 146 147 148 static void r300_swizzle_split( 149 struct rc_src_register src, unsigned int mask, 150 struct rc_swizzle_split * split) 151 { 152 split->NumPhases = 0; 153 154 while(mask) { 155 unsigned int best_matchcount = 0; 156 unsigned int best_matchmask = 0; 157 int i, comp; 158 159 for(i = 0; i < num_native_swizzles; ++i) { 160 const struct swizzle_data *sd = &native_swizzles[i]; 161 unsigned int matchcount = 0; 162 unsigned int matchmask = 0; 163 for(comp = 0; comp < 3; ++comp) { 164 unsigned int swz; 165 if (!GET_BIT(mask, comp)) 166 continue; 167 swz = GET_SWZ(src.Swizzle, comp); 168 if (swz == RC_SWIZZLE_UNUSED) 169 continue; 170 if (swz == GET_SWZ(sd->hash, comp)) { 171 /* check if the negate bit of current component 172 * is the same for already matched components */ 173 if (matchmask && (!!(src.Negate & matchmask) != !!(src.Negate & (1 << comp)))) 174 continue; 175 176 matchcount++; 177 matchmask |= 1 << comp; 178 } 179 } 180 if (matchcount > best_matchcount) { 181 best_matchcount = matchcount; 182 best_matchmask = matchmask; 183 if (matchmask == (mask & RC_MASK_XYZ)) 184 break; 185 } 186 } 187 188 if (mask & RC_MASK_W) 189 best_matchmask |= RC_MASK_W; 190 191 split->Phase[split->NumPhases++] = best_matchmask; 192 mask &= ~best_matchmask; 193 } 194 } 195 196 struct rc_swizzle_caps r300_swizzle_caps = { 197 .IsNative = r300_swizzle_is_native, 198 .Split = r300_swizzle_split 199 }; 200 201 202 /** 203 * Translate an RGB (XYZ) swizzle into the hardware code for the given 204 * instruction source. 205 */ 206 unsigned int r300FPTranslateRGBSwizzle(unsigned int src, unsigned int swizzle) 207 { 208 const struct swizzle_data* sd = lookup_native_swizzle(swizzle); 209 210 if (!sd || (src == RC_PAIR_PRESUB_SRC && sd->srcp_stride == 0)) { 211 fprintf(stderr, "Not a native swizzle: %08x\n", swizzle); 212 return 0; 213 } 214 215 if (src == RC_PAIR_PRESUB_SRC) { 216 return sd->base + sd->srcp_stride; 217 } else { 218 return sd->base + src*sd->stride; 219 } 220 } 221 222 223 /** 224 * Translate an Alpha (W) swizzle into the hardware code for the given 225 * instruction source. 226 */ 227 unsigned int r300FPTranslateAlphaSwizzle(unsigned int src, unsigned int swizzle) 228 { 229 unsigned int swz = GET_SWZ(swizzle, 0); 230 if (src == RC_PAIR_PRESUB_SRC) { 231 return R300_ALU_ARGA_SRCP_X + swz; 232 } 233 if (swz < 3) 234 return swz + 3*src; 235 236 switch(swz) { 237 case RC_SWIZZLE_W: return R300_ALU_ARGA_SRC0A + src; 238 case RC_SWIZZLE_ONE: return R300_ALU_ARGA_ONE; 239 case RC_SWIZZLE_ZERO: return R300_ALU_ARGA_ZERO; 240 case RC_SWIZZLE_HALF: return R300_ALU_ARGA_HALF; 241 default: return R300_ALU_ARGA_ONE; 242 } 243 } 244
