From cf88dcf7313b6a0112c36c2f05ce6a7e846d268c Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Fri, 16 Apr 2010 10:17:38 -0600 Subject: gallivm/llvmpipe: move lp_bld_interp.c to llvmpipe/ directory This file is specific to the llvmpipe driver and not re-usable. --- src/gallium/drivers/llvmpipe/Makefile | 1 + src/gallium/drivers/llvmpipe/SConscript | 1 + src/gallium/drivers/llvmpipe/lp_bld_interp.c | 408 +++++++++++++++++++++++++++ src/gallium/drivers/llvmpipe/lp_bld_interp.h | 96 +++++++ 4 files changed, 506 insertions(+) create mode 100644 src/gallium/drivers/llvmpipe/lp_bld_interp.c create mode 100644 src/gallium/drivers/llvmpipe/lp_bld_interp.h (limited to 'src/gallium/drivers') diff --git a/src/gallium/drivers/llvmpipe/Makefile b/src/gallium/drivers/llvmpipe/Makefile index a35a24f5b06..85eaf5935de 100644 --- a/src/gallium/drivers/llvmpipe/Makefile +++ b/src/gallium/drivers/llvmpipe/Makefile @@ -6,6 +6,7 @@ LIBNAME = llvmpipe DEFINES += -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS C_SOURCES = \ + lp_bld_interp.c \ lp_clear.c \ lp_context.c \ lp_draw_arrays.c \ diff --git a/src/gallium/drivers/llvmpipe/SConscript b/src/gallium/drivers/llvmpipe/SConscript index 8e3267c8438..d8a5e915d99 100644 --- a/src/gallium/drivers/llvmpipe/SConscript +++ b/src/gallium/drivers/llvmpipe/SConscript @@ -26,6 +26,7 @@ env.Depends('lp_tile_soa.c', [ llvmpipe = env.ConvenienceLibrary( target = 'llvmpipe', source = [ + 'lp_bld_interp.c', 'lp_clear.c', 'lp_context.c', 'lp_draw_arrays.c', diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.c b/src/gallium/drivers/llvmpipe/lp_bld_interp.c new file mode 100644 index 00000000000..cb1d7b2f82a --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.c @@ -0,0 +1,408 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * Copyright 2007-2008 Tungsten Graphics, Inc., Cedar Park, Texas. + * 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, sub license, 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL TUNGSTEN GRAPHICS 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 + * Position and shader input interpolation. + * + * @author Jose Fonseca + */ + +#include "pipe/p_shader_tokens.h" +#include "util/u_debug.h" +#include "util/u_memory.h" +#include "util/u_math.h" +#include "tgsi/tgsi_parse.h" +#include "gallivm/lp_bld_debug.h" +#include "gallivm/lp_bld_const.h" +#include "gallivm/lp_bld_arit.h" +#include "gallivm/lp_bld_swizzle.h" +#include "lp_bld_interp.h" + + +/* + * The shader JIT function operates on blocks of quads. + * Each block has 2x2 quads and each quad has 2x2 pixels. + * + * We iterate over the quads in order 0, 1, 2, 3: + * + * ################# + * # | # | # + * #---0---#---1---# + * # | # | # + * ################# + * # | # | # + * #---2---#---3---# + * # | # | # + * ################# + * + * Within each quad, we have four pixels which are represented in SOA + * order: + * + * ######### + * # 0 | 1 # + * #---+---# + * # 2 | 3 # + * ######### + * + * So the green channel (for example) of the four pixels is stored in + * a single vector register: {g0, g1, g2, g3}. + */ + + +static void +attrib_name(LLVMValueRef val, unsigned attrib, unsigned chan, const char *suffix) +{ + if(attrib == 0) + lp_build_name(val, "pos.%c%s", "xyzw"[chan], suffix); + else + lp_build_name(val, "input%u.%c%s", attrib - 1, "xyzw"[chan], suffix); +} + + +/** + * Initialize the bld->a0, dadx, dady fields. This involves fetching + * those values from the arrays which are passed into the JIT function. + */ +static void +coeffs_init(struct lp_build_interp_soa_context *bld, + LLVMValueRef a0_ptr, + LLVMValueRef dadx_ptr, + LLVMValueRef dady_ptr) +{ + LLVMBuilderRef builder = bld->base.builder; + unsigned attrib; + unsigned chan; + + for(attrib = 0; attrib < bld->num_attribs; ++attrib) { + unsigned mask = bld->mask[attrib]; + unsigned mode = bld->mode[attrib]; + for(chan = 0; chan < NUM_CHANNELS; ++chan) { + if(mask & (1 << chan)) { + LLVMValueRef index = LLVMConstInt(LLVMInt32Type(), attrib*NUM_CHANNELS + chan, 0); + LLVMValueRef a0 = NULL; + LLVMValueRef dadx = NULL; + LLVMValueRef dady = NULL; + + switch( mode ) { + case TGSI_INTERPOLATE_PERSPECTIVE: + /* fall-through */ + + case TGSI_INTERPOLATE_LINEAR: + dadx = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dadx_ptr, &index, 1, ""), ""); + dady = LLVMBuildLoad(builder, LLVMBuildGEP(builder, dady_ptr, &index, 1, ""), ""); + dadx = lp_build_broadcast_scalar(&bld->base, dadx); + dady = lp_build_broadcast_scalar(&bld->base, dady); + attrib_name(dadx, attrib, chan, ".dadx"); + attrib_name(dady, attrib, chan, ".dady"); + /* fall-through */ + + case TGSI_INTERPOLATE_CONSTANT: + a0 = LLVMBuildLoad(builder, LLVMBuildGEP(builder, a0_ptr, &index, 1, ""), ""); + a0 = lp_build_broadcast_scalar(&bld->base, a0); + attrib_name(a0, attrib, chan, ".a0"); + break; + + default: + assert(0); + break; + } + + bld->a0 [attrib][chan] = a0; + bld->dadx[attrib][chan] = dadx; + bld->dady[attrib][chan] = dady; + } + } + } +} + + +/** + * Emit LLVM code to compute the fragment shader input attribute values. + * For example, for a color input, we'll compute red, green, blue and alpha + * values for the four pixels in a quad. + * Recall that we're operating on 4-element vectors so each arithmetic + * operation is operating on the four pixels in a quad. + */ +static void +attribs_init(struct lp_build_interp_soa_context *bld) +{ + LLVMValueRef x = bld->pos[0]; + LLVMValueRef y = bld->pos[1]; + LLVMValueRef oow = NULL; + unsigned attrib; + unsigned chan; + + for(attrib = 0; attrib < bld->num_attribs; ++attrib) { + unsigned mask = bld->mask[attrib]; + unsigned mode = bld->mode[attrib]; + for(chan = 0; chan < NUM_CHANNELS; ++chan) { + if(mask & (1 << chan)) { + LLVMValueRef a0 = bld->a0 [attrib][chan]; + LLVMValueRef dadx = bld->dadx[attrib][chan]; + LLVMValueRef dady = bld->dady[attrib][chan]; + LLVMValueRef res; + + res = a0; + + if (mode != TGSI_INTERPOLATE_CONSTANT) { + /* res = res + x * dadx */ + res = lp_build_add(&bld->base, res, lp_build_mul(&bld->base, x, dadx)); + /* res = res + y * dady */ + res = lp_build_add(&bld->base, res, lp_build_mul(&bld->base, y, dady)); + } + + /* Keep the value of the attribue before perspective divide for faster updates */ + bld->attribs_pre[attrib][chan] = res; + + if (mode == TGSI_INTERPOLATE_PERSPECTIVE) { + LLVMValueRef w = bld->pos[3]; + assert(attrib != 0); + if(!oow) + oow = lp_build_rcp(&bld->base, w); + res = lp_build_mul(&bld->base, res, oow); + } + + attrib_name(res, attrib, chan, ""); + + bld->attribs[attrib][chan] = res; + } + } + } +} + + +/** + * Increment the shader input attribute values. + * This is called when we move from one quad to the next. + */ +static void +attribs_update(struct lp_build_interp_soa_context *bld, int quad_index) +{ + LLVMValueRef oow = NULL; + unsigned attrib; + unsigned chan; + + assert(quad_index < 4); + + for(attrib = 0; attrib < bld->num_attribs; ++attrib) { + unsigned mask = bld->mask[attrib]; + unsigned mode = bld->mode[attrib]; + + if (mode != TGSI_INTERPOLATE_CONSTANT) { + for(chan = 0; chan < NUM_CHANNELS; ++chan) { + if(mask & (1 << chan)) { + LLVMValueRef dadx = bld->dadx[attrib][chan]; + LLVMValueRef dady = bld->dady[attrib][chan]; + LLVMValueRef res; + + res = bld->attribs_pre[attrib][chan]; + + if (quad_index == 1 || quad_index == 3) { + /* top-right or bottom-right quad */ + /* build res = res + dadx + dadx */ + res = lp_build_add(&bld->base, res, dadx); + res = lp_build_add(&bld->base, res, dadx); + } + + if (quad_index == 2 || quad_index == 3) { + /* bottom-left or bottom-right quad */ + /* build res = res + dady + dady */ + res = lp_build_add(&bld->base, res, dady); + res = lp_build_add(&bld->base, res, dady); + } + + //XXX bld->attribs_pre[attrib][chan] = res; + + if (mode == TGSI_INTERPOLATE_PERSPECTIVE) { + LLVMValueRef w = bld->pos[3]; + assert(attrib != 0); + if(!oow) + oow = lp_build_rcp(&bld->base, w); + res = lp_build_mul(&bld->base, res, oow); + } + + attrib_name(res, attrib, chan, ""); + + bld->attribs[attrib][chan] = res; + } + } + } + } +} + + +/** + * Generate the position vectors. + * + * Parameter x0, y0 are the integer values with the quad upper left coordinates. + */ +static void +pos_init(struct lp_build_interp_soa_context *bld, + LLVMValueRef x0, + LLVMValueRef y0) +{ + lp_build_name(x0, "pos.x"); + lp_build_name(y0, "pos.y"); + + bld->attribs[0][0] = x0; + bld->attribs[0][1] = y0; +} + + +/** + * Update quad position values when moving to the next quad. + */ +static void +pos_update(struct lp_build_interp_soa_context *bld, int quad_index) +{ + LLVMValueRef x = bld->attribs[0][0]; + LLVMValueRef y = bld->attribs[0][1]; + const int xstep = 2, ystep = 2; + + if (quad_index == 1 || quad_index == 3) { + /* top-right or bottom-right quad in block */ + /* build x += xstep */ + x = lp_build_add(&bld->base, x, + lp_build_const_vec(bld->base.type, xstep)); + } + + if (quad_index == 2) { + /* bottom-left quad in block */ + /* build y += ystep */ + y = lp_build_add(&bld->base, y, + lp_build_const_vec(bld->base.type, ystep)); + /* build x -= xstep */ + x = lp_build_sub(&bld->base, x, + lp_build_const_vec(bld->base.type, xstep)); + } + + lp_build_name(x, "pos.x"); + lp_build_name(y, "pos.y"); + + bld->attribs[0][0] = x; + bld->attribs[0][1] = y; +} + + +/** + * Initialize fragment shader input attribute info. + */ +void +lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld, + const struct tgsi_token *tokens, + boolean flatshade, + LLVMBuilderRef builder, + struct lp_type type, + LLVMValueRef a0_ptr, + LLVMValueRef dadx_ptr, + LLVMValueRef dady_ptr, + LLVMValueRef x0, + LLVMValueRef y0) +{ + struct tgsi_parse_context parse; + struct tgsi_full_declaration *decl; + + memset(bld, 0, sizeof *bld); + + lp_build_context_init(&bld->base, builder, type); + + /* For convenience */ + bld->pos = bld->attribs[0]; + bld->inputs = (const LLVMValueRef (*)[NUM_CHANNELS]) bld->attribs[1]; + + /* Position */ + bld->num_attribs = 1; + bld->mask[0] = TGSI_WRITEMASK_ZW; + bld->mode[0] = TGSI_INTERPOLATE_LINEAR; + + /* Inputs */ + tgsi_parse_init( &parse, tokens ); + while( !tgsi_parse_end_of_tokens( &parse ) ) { + tgsi_parse_token( &parse ); + + switch( parse.FullToken.Token.Type ) { + case TGSI_TOKEN_TYPE_DECLARATION: + decl = &parse.FullToken.FullDeclaration; + if( decl->Declaration.File == TGSI_FILE_INPUT ) { + unsigned first, last, mask; + unsigned attrib; + + first = decl->Range.First; + last = decl->Range.Last; + mask = decl->Declaration.UsageMask; + + for( attrib = first; attrib <= last; ++attrib ) { + bld->mask[1 + attrib] = mask; + + /* XXX: have mesa set INTERP_CONSTANT in the fragment + * shader. + */ + if (decl->Semantic.Name == TGSI_SEMANTIC_COLOR && + flatshade) + bld->mode[1 + attrib] = TGSI_INTERPOLATE_CONSTANT; + else + bld->mode[1 + attrib] = decl->Declaration.Interpolate; + } + + bld->num_attribs = MAX2(bld->num_attribs, 1 + last + 1); + } + break; + + case TGSI_TOKEN_TYPE_INSTRUCTION: + case TGSI_TOKEN_TYPE_IMMEDIATE: + case TGSI_TOKEN_TYPE_PROPERTY: + break; + + default: + assert( 0 ); + } + } + tgsi_parse_free( &parse ); + + coeffs_init(bld, a0_ptr, dadx_ptr, dady_ptr); + + pos_init(bld, x0, y0); + + attribs_init(bld); +} + + +/** + * Advance the position and inputs to the given quad within the block. + */ +void +lp_build_interp_soa_update(struct lp_build_interp_soa_context *bld, + int quad_index) +{ + assert(quad_index < 4); + + pos_update(bld, quad_index); + + attribs_update(bld, quad_index); +} diff --git a/src/gallium/drivers/llvmpipe/lp_bld_interp.h b/src/gallium/drivers/llvmpipe/lp_bld_interp.h new file mode 100644 index 00000000000..d9e3fd1cd86 --- /dev/null +++ b/src/gallium/drivers/llvmpipe/lp_bld_interp.h @@ -0,0 +1,96 @@ +/************************************************************************** + * + * Copyright 2009 VMware, Inc. + * 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, sub license, 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 NON-INFRINGEMENT. + * IN NO EVENT SHALL VMWARE 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 + * Position and shader input interpolation. + * + * Special attention is given to the interpolation of side by side quads. + * Multiplications are made only for the first quad. Interpolation of + * inputs for posterior quads are done exclusively with additions, and + * perspective divide if necessary. + * + * @author Jose Fonseca + */ + +#ifndef LP_BLD_INTERP_H +#define LP_BLD_INTERP_H + + +#include "gallivm/lp_bld.h" +#include "gallivm/lp_bld_type.h" + +#include "tgsi/tgsi_exec.h" + + + +struct tgsi_token; + + +struct lp_build_interp_soa_context +{ + struct lp_build_context base; + + unsigned num_attribs; + unsigned mask[1 + PIPE_MAX_SHADER_INPUTS]; + unsigned mode[1 + PIPE_MAX_SHADER_INPUTS]; + + LLVMValueRef a0 [1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; + LLVMValueRef dadx[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; + LLVMValueRef dady[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; + + /* Attribute values before perspective divide */ + LLVMValueRef attribs_pre[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; + + LLVMValueRef attribs[1 + PIPE_MAX_SHADER_INPUTS][NUM_CHANNELS]; + + /* + * Convenience pointers. Callers may access this one. + */ + const LLVMValueRef *pos; + const LLVMValueRef (*inputs)[NUM_CHANNELS]; +}; + + +void +lp_build_interp_soa_init(struct lp_build_interp_soa_context *bld, + const struct tgsi_token *tokens, + boolean flatshade, + LLVMBuilderRef builder, + struct lp_type type, + LLVMValueRef a0_ptr, + LLVMValueRef dadx_ptr, + LLVMValueRef dady_ptr, + LLVMValueRef x0, + LLVMValueRef y0); + +void +lp_build_interp_soa_update(struct lp_build_interp_soa_context *bld, + int quad_index); + + +#endif /* LP_BLD_INTERP_H */ -- cgit v1.2.3