/*
|
* Copyright (C) 2008 Nicolai Haehnle.
|
*
|
* All Rights Reserved.
|
*
|
* Permission is hereby granted, free of charge, to any person obtaining
|
* a copy of this software and associated documentation files (the
|
* "Software"), to deal in the Software without restriction, including
|
* without limitation the rights to use, copy, modify, merge, publish,
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
* permit persons to whom the Software is furnished to do so, subject to
|
* the following conditions:
|
*
|
* The above copyright notice and this permission notice (including the
|
* next paragraph) shall be included in all copies or substantial
|
* portions of the Software.
|
*
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
* IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
|
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
|
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
|
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
*
|
*/
|
|
/**
|
* @file
|
* Utilities to deal with the somewhat odd restriction on R300 fragment
|
* program swizzles.
|
*/
|
|
#include "r300_fragprog_swizzle.h"
|
|
#include <stdio.h>
|
|
#include "util/macros.h"
|
|
#include "r300_reg.h"
|
#include "radeon_compiler.h"
|
|
#define MAKE_SWZ3(x, y, z) (RC_MAKE_SWIZZLE(RC_SWIZZLE_##x, RC_SWIZZLE_##y, RC_SWIZZLE_##z, RC_SWIZZLE_ZERO))
|
|
struct swizzle_data {
|
unsigned int hash; /**< swizzle value this matches */
|
unsigned int base; /**< base value for hw swizzle */
|
unsigned int stride; /**< difference in base between arg0/1/2 */
|
unsigned int srcp_stride; /**< difference in base between arg0/scrp */
|
};
|
|
static const struct swizzle_data native_swizzles[] = {
|
{MAKE_SWZ3(X, Y, Z), R300_ALU_ARGC_SRC0C_XYZ, 4, 15},
|
{MAKE_SWZ3(X, X, X), R300_ALU_ARGC_SRC0C_XXX, 4, 15},
|
{MAKE_SWZ3(Y, Y, Y), R300_ALU_ARGC_SRC0C_YYY, 4, 15},
|
{MAKE_SWZ3(Z, Z, Z), R300_ALU_ARGC_SRC0C_ZZZ, 4, 15},
|
{MAKE_SWZ3(W, W, W), R300_ALU_ARGC_SRC0A, 1, 7},
|
{MAKE_SWZ3(Y, Z, X), R300_ALU_ARGC_SRC0C_YZX, 1, 0},
|
{MAKE_SWZ3(Z, X, Y), R300_ALU_ARGC_SRC0C_ZXY, 1, 0},
|
{MAKE_SWZ3(W, Z, Y), R300_ALU_ARGC_SRC0CA_WZY, 1, 0},
|
{MAKE_SWZ3(ONE, ONE, ONE), R300_ALU_ARGC_ONE, 0, 0},
|
{MAKE_SWZ3(ZERO, ZERO, ZERO), R300_ALU_ARGC_ZERO, 0, 0},
|
{MAKE_SWZ3(HALF, HALF, HALF), R300_ALU_ARGC_HALF, 0, 0}
|
};
|
|
static const int num_native_swizzles = ARRAY_SIZE(native_swizzles);
|
|
/**
|
* Find a native RGB swizzle that matches the given swizzle.
|
* Returns 0 if none found.
|
*/
|
static const struct swizzle_data* lookup_native_swizzle(unsigned int swizzle)
|
{
|
int i, comp;
|
|
for(i = 0; i < num_native_swizzles; ++i) {
|
const struct swizzle_data* sd = &native_swizzles[i];
|
for(comp = 0; comp < 3; ++comp) {
|
unsigned int swz = GET_SWZ(swizzle, comp);
|
if (swz == RC_SWIZZLE_UNUSED)
|
continue;
|
if (swz != GET_SWZ(sd->hash, comp))
|
break;
|
}
|
if (comp == 3)
|
return sd;
|
}
|
|
return 0;
|
}
|
|
/**
|
* Determines if the given swizzle is valid for r300/r400. In most situations
|
* it is better to use r300_swizzle_is_native() which can be accesed via
|
* struct radeon_compiler *c; c->SwizzleCaps->IsNative().
|
*/
|
int r300_swizzle_is_native_basic(unsigned int swizzle)
|
{
|
if(lookup_native_swizzle(swizzle))
|
return 1;
|
else
|
return 0;
|
}
|
|
/**
|
* Check whether the given instruction supports the swizzle and negate
|
* combinations in the given source register.
|
*/
|
static int r300_swizzle_is_native(rc_opcode opcode, struct rc_src_register reg)
|
{
|
const struct swizzle_data* sd;
|
unsigned int relevant;
|
int j;
|
|
if (opcode == RC_OPCODE_KIL ||
|
opcode == RC_OPCODE_TEX ||
|
opcode == RC_OPCODE_TXB ||
|
opcode == RC_OPCODE_TXP) {
|
if (reg.Abs || reg.Negate)
|
return 0;
|
|
for(j = 0; j < 4; ++j) {
|
unsigned int swz = GET_SWZ(reg.Swizzle, j);
|
if (swz == RC_SWIZZLE_UNUSED)
|
continue;
|
if (swz != j)
|
return 0;
|
}
|
|
return 1;
|
}
|
|
relevant = 0;
|
|
for(j = 0; j < 3; ++j)
|
if (GET_SWZ(reg.Swizzle, j) != RC_SWIZZLE_UNUSED)
|
relevant |= 1 << j;
|
|
if ((reg.Negate & relevant) && ((reg.Negate & relevant) != relevant))
|
return 0;
|
|
sd = lookup_native_swizzle(reg.Swizzle);
|
if (!sd || (reg.File == RC_FILE_PRESUB && sd->srcp_stride == 0))
|
return 0;
|
|
return 1;
|
}
|
|
|
static void r300_swizzle_split(
|
struct rc_src_register src, unsigned int mask,
|
struct rc_swizzle_split * split)
|
{
|
split->NumPhases = 0;
|
|
while(mask) {
|
unsigned int best_matchcount = 0;
|
unsigned int best_matchmask = 0;
|
int i, comp;
|
|
for(i = 0; i < num_native_swizzles; ++i) {
|
const struct swizzle_data *sd = &native_swizzles[i];
|
unsigned int matchcount = 0;
|
unsigned int matchmask = 0;
|
for(comp = 0; comp < 3; ++comp) {
|
unsigned int swz;
|
if (!GET_BIT(mask, comp))
|
continue;
|
swz = GET_SWZ(src.Swizzle, comp);
|
if (swz == RC_SWIZZLE_UNUSED)
|
continue;
|
if (swz == GET_SWZ(sd->hash, comp)) {
|
/* check if the negate bit of current component
|
* is the same for already matched components */
|
if (matchmask && (!!(src.Negate & matchmask) != !!(src.Negate & (1 << comp))))
|
continue;
|
|
matchcount++;
|
matchmask |= 1 << comp;
|
}
|
}
|
if (matchcount > best_matchcount) {
|
best_matchcount = matchcount;
|
best_matchmask = matchmask;
|
if (matchmask == (mask & RC_MASK_XYZ))
|
break;
|
}
|
}
|
|
if (mask & RC_MASK_W)
|
best_matchmask |= RC_MASK_W;
|
|
split->Phase[split->NumPhases++] = best_matchmask;
|
mask &= ~best_matchmask;
|
}
|
}
|
|
struct rc_swizzle_caps r300_swizzle_caps = {
|
.IsNative = r300_swizzle_is_native,
|
.Split = r300_swizzle_split
|
};
|
|
|
/**
|
* Translate an RGB (XYZ) swizzle into the hardware code for the given
|
* instruction source.
|
*/
|
unsigned int r300FPTranslateRGBSwizzle(unsigned int src, unsigned int swizzle)
|
{
|
const struct swizzle_data* sd = lookup_native_swizzle(swizzle);
|
|
if (!sd || (src == RC_PAIR_PRESUB_SRC && sd->srcp_stride == 0)) {
|
fprintf(stderr, "Not a native swizzle: %08x\n", swizzle);
|
return 0;
|
}
|
|
if (src == RC_PAIR_PRESUB_SRC) {
|
return sd->base + sd->srcp_stride;
|
} else {
|
return sd->base + src*sd->stride;
|
}
|
}
|
|
|
/**
|
* Translate an Alpha (W) swizzle into the hardware code for the given
|
* instruction source.
|
*/
|
unsigned int r300FPTranslateAlphaSwizzle(unsigned int src, unsigned int swizzle)
|
{
|
unsigned int swz = GET_SWZ(swizzle, 0);
|
if (src == RC_PAIR_PRESUB_SRC) {
|
return R300_ALU_ARGA_SRCP_X + swz;
|
}
|
if (swz < 3)
|
return swz + 3*src;
|
|
switch(swz) {
|
case RC_SWIZZLE_W: return R300_ALU_ARGA_SRC0A + src;
|
case RC_SWIZZLE_ONE: return R300_ALU_ARGA_ONE;
|
case RC_SWIZZLE_ZERO: return R300_ALU_ARGA_ZERO;
|
case RC_SWIZZLE_HALF: return R300_ALU_ARGA_HALF;
|
default: return R300_ALU_ARGA_ONE;
|
}
|
}
|
