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* Copyright (C) 2008 Nicolai Haehnle.
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial
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* portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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* Utilities to deal with the somewhat odd restriction on R300 fragment
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#include "r300_fragprog_swizzle.h"
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#include "util/macros.h"
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#include "radeon_compiler.h"
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#define MAKE_SWZ3(x, y, z) (RC_MAKE_SWIZZLE(RC_SWIZZLE_##x, RC_SWIZZLE_##y, RC_SWIZZLE_##z, RC_SWIZZLE_ZERO))
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unsigned int hash; /**< swizzle value this matches */
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unsigned int base; /**< base value for hw swizzle */
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unsigned int stride; /**< difference in base between arg0/1/2 */
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unsigned int srcp_stride; /**< difference in base between arg0/scrp */
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static const struct swizzle_data native_swizzles[] = {
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{MAKE_SWZ3(X, Y, Z), R300_ALU_ARGC_SRC0C_XYZ, 4, 15},
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{MAKE_SWZ3(X, X, X), R300_ALU_ARGC_SRC0C_XXX, 4, 15},
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{MAKE_SWZ3(Y, Y, Y), R300_ALU_ARGC_SRC0C_YYY, 4, 15},
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{MAKE_SWZ3(Z, Z, Z), R300_ALU_ARGC_SRC0C_ZZZ, 4, 15},
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{MAKE_SWZ3(W, W, W), R300_ALU_ARGC_SRC0A, 1, 7},
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{MAKE_SWZ3(Y, Z, X), R300_ALU_ARGC_SRC0C_YZX, 1, 0},
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{MAKE_SWZ3(Z, X, Y), R300_ALU_ARGC_SRC0C_ZXY, 1, 0},
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{MAKE_SWZ3(W, Z, Y), R300_ALU_ARGC_SRC0CA_WZY, 1, 0},
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{MAKE_SWZ3(ONE, ONE, ONE), R300_ALU_ARGC_ONE, 0, 0},
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{MAKE_SWZ3(ZERO, ZERO, ZERO), R300_ALU_ARGC_ZERO, 0, 0},
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{MAKE_SWZ3(HALF, HALF, HALF), R300_ALU_ARGC_HALF, 0, 0}
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static const int num_native_swizzles = ARRAY_SIZE(native_swizzles);
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* Find a native RGB swizzle that matches the given swizzle.
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* Returns 0 if none found.
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static const struct swizzle_data* lookup_native_swizzle(unsigned int swizzle)
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for(i = 0; i < num_native_swizzles; ++i) {
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const struct swizzle_data* sd = &native_swizzles[i];
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for(comp = 0; comp < 3; ++comp) {
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unsigned int swz = GET_SWZ(swizzle, comp);
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if (swz == RC_SWIZZLE_UNUSED)
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if (swz != GET_SWZ(sd->hash, comp))
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* Determines if the given swizzle is valid for r300/r400. In most situations
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* it is better to use r300_swizzle_is_native() which can be accessed via
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* struct radeon_compiler *c; c->SwizzleCaps->IsNative().
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int r300_swizzle_is_native_basic(unsigned int swizzle)
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if(lookup_native_swizzle(swizzle))
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* Check whether the given instruction supports the swizzle and negate
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* combinations in the given source register.
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static int r300_swizzle_is_native(rc_opcode opcode, struct rc_src_register reg)
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const struct swizzle_data* sd;
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unsigned int relevant;
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if (opcode == RC_OPCODE_KIL ||
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opcode == RC_OPCODE_TEX ||
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opcode == RC_OPCODE_TXB ||
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opcode == RC_OPCODE_TXP) {
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if (reg.Abs || reg.Negate)
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for(j = 0; j < 4; ++j) {
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unsigned int swz = GET_SWZ(reg.Swizzle, j);
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if (swz == RC_SWIZZLE_UNUSED)
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for(j = 0; j < 3; ++j)
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if (GET_SWZ(reg.Swizzle, j) != RC_SWIZZLE_UNUSED)
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if ((reg.Negate & relevant) && ((reg.Negate & relevant) != relevant))
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sd = lookup_native_swizzle(reg.Swizzle);
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if (!sd || (reg.File == RC_FILE_PRESUB && sd->srcp_stride == 0))
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static void r300_swizzle_split(
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struct rc_src_register src, unsigned int mask,
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struct rc_swizzle_split * split)
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split->NumPhases = 0;
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unsigned int best_matchcount = 0;
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unsigned int best_matchmask = 0;
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for(i = 0; i < num_native_swizzles; ++i) {
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const struct swizzle_data *sd = &native_swizzles[i];
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unsigned int matchcount = 0;
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unsigned int matchmask = 0;
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for(comp = 0; comp < 3; ++comp) {
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if (!GET_BIT(mask, comp))
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swz = GET_SWZ(src.Swizzle, comp);
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if (swz == RC_SWIZZLE_UNUSED)
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if (swz == GET_SWZ(sd->hash, comp)) {
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/* check if the negate bit of current component
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* is the same for already matched components */
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if (matchmask && (!!(src.Negate & matchmask) != !!(src.Negate & (1 << comp))))
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matchmask |= 1 << comp;
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if (matchcount > best_matchcount) {
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best_matchcount = matchcount;
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best_matchmask = matchmask;
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if (matchmask == (mask & RC_MASK_XYZ))
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if (mask & RC_MASK_W)
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best_matchmask |= RC_MASK_W;
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split->Phase[split->NumPhases++] = best_matchmask;
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mask &= ~best_matchmask;
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const struct rc_swizzle_caps r300_swizzle_caps = {
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.IsNative = r300_swizzle_is_native,
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.Split = r300_swizzle_split
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* Translate an RGB (XYZ) swizzle into the hardware code for the given
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* instruction source.
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unsigned int r300FPTranslateRGBSwizzle(unsigned int src, unsigned int swizzle)
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const struct swizzle_data* sd = lookup_native_swizzle(swizzle);
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if (!sd || (src == RC_PAIR_PRESUB_SRC && sd->srcp_stride == 0)) {
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fprintf(stderr, "Not a native swizzle: %08x\n", swizzle);
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if (src == RC_PAIR_PRESUB_SRC) {
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return sd->base + sd->srcp_stride;
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return sd->base + src*sd->stride;
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* Translate an Alpha (W) swizzle into the hardware code for the given
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* instruction source.
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unsigned int r300FPTranslateAlphaSwizzle(unsigned int src, unsigned int swizzle)
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unsigned int swz = GET_SWZ(swizzle, 0);
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if (src == RC_PAIR_PRESUB_SRC) {
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return R300_ALU_ARGA_SRCP_X + swz;
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case RC_SWIZZLE_W: return R300_ALU_ARGA_SRC0A + src;
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case RC_SWIZZLE_ONE: return R300_ALU_ARGA_ONE;
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case RC_SWIZZLE_ZERO: return R300_ALU_ARGA_ZERO;
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case RC_SWIZZLE_HALF: return R300_ALU_ARGA_HALF;
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default: return R300_ALU_ARGA_ONE;