From c61bf363937f40624a5632745630d4f2b9907082 Mon Sep 17 00:00:00 2001 From: Zack Rusin Date: Mon, 8 Feb 2010 18:05:22 -0500 Subject: llvmpipe: export the tgsi translation code to a common layer the llvmpipe tgsi translation is a lot more complete than what was in gallivm so replacing the latter with the former. this is needed since the draw llvm paths will use the same code. effectively the proven llvmpipe code becomes gallivm. --- src/gallium/auxiliary/gallivm/lp_bld_depth.c | 213 +++++++++++++++++++++++++++ 1 file changed, 213 insertions(+) create mode 100644 src/gallium/auxiliary/gallivm/lp_bld_depth.c (limited to 'src/gallium/auxiliary/gallivm/lp_bld_depth.c') diff --git a/src/gallium/auxiliary/gallivm/lp_bld_depth.c b/src/gallium/auxiliary/gallivm/lp_bld_depth.c new file mode 100644 index 00000000000..d438c0e63d7 --- /dev/null +++ b/src/gallium/auxiliary/gallivm/lp_bld_depth.c @@ -0,0 +1,213 @@ +/************************************************************************** + * + * 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 + * Depth/stencil testing to LLVM IR translation. + * + * To be done accurately/efficiently the depth/stencil test must be done with + * the same type/format of the depth/stencil buffer, which implies massaging + * the incoming depths to fit into place. Using a more straightforward + * type/format for depth/stencil values internally and only convert when + * flushing would avoid this, but it would most likely result in depth fighting + * artifacts. + * + * We are free to use a different pixel layout though. Since our basic + * processing unit is a quad (2x2 pixel block) we store the depth/stencil + * values tiled, a quad at time. That is, a depth buffer containing + * + * Z11 Z12 Z13 Z14 ... + * Z21 Z22 Z23 Z24 ... + * Z31 Z32 Z33 Z34 ... + * Z41 Z42 Z43 Z44 ... + * ... ... ... ... ... + * + * will actually be stored in memory as + * + * Z11 Z12 Z21 Z22 Z13 Z14 Z23 Z24 ... + * Z31 Z32 Z41 Z42 Z33 Z34 Z43 Z44 ... + * ... ... ... ... ... ... ... ... ... + * + * FIXME: Code generate stencil test + * + * @author Jose Fonseca + */ + +#include "pipe/p_state.h" +#include "util/u_format.h" + +#include "lp_bld_type.h" +#include "lp_bld_const.h" +#include "lp_bld_logic.h" +#include "lp_bld_flow.h" +#include "lp_bld_debug.h" +#include "lp_bld_depth.h" + + +/** + * Return a type appropriate for depth/stencil testing. + */ +struct lp_type +lp_depth_type(const struct util_format_description *format_desc, + unsigned length) +{ + struct lp_type type; + unsigned swizzle; + + assert(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS); + assert(format_desc->block.width == 1); + assert(format_desc->block.height == 1); + + swizzle = format_desc->swizzle[0]; + assert(swizzle < 4); + + memset(&type, 0, sizeof type); + type.width = format_desc->block.bits; + + if(format_desc->channel[swizzle].type == UTIL_FORMAT_TYPE_FLOAT) { + type.floating = TRUE; + assert(swizzle == 0); + assert(format_desc->channel[swizzle].size == format_desc->block.bits); + } + else if(format_desc->channel[swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED) { + assert(format_desc->block.bits <= 32); + if(format_desc->channel[swizzle].normalized) + type.norm = TRUE; + } + else + assert(0); + + assert(type.width <= length); + type.length = length / type.width; + + return type; +} + + +/** + * Depth test. + */ +void +lp_build_depth_test(LLVMBuilderRef builder, + const struct pipe_depth_state *state, + struct lp_type type, + const struct util_format_description *format_desc, + struct lp_build_mask_context *mask, + LLVMValueRef src, + LLVMValueRef dst_ptr) +{ + struct lp_build_context bld; + unsigned z_swizzle; + LLVMValueRef dst; + LLVMValueRef z_bitmask = NULL; + LLVMValueRef test; + + if(!state->enabled) + return; + + assert(format_desc->colorspace == UTIL_FORMAT_COLORSPACE_ZS); + assert(format_desc->block.width == 1); + assert(format_desc->block.height == 1); + + z_swizzle = format_desc->swizzle[0]; + if(z_swizzle == UTIL_FORMAT_SWIZZLE_NONE) + return; + + /* Sanity checking */ + assert(z_swizzle < 4); + assert(format_desc->block.bits == type.width); + if(type.floating) { + assert(z_swizzle == 0); + assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_FLOAT); + assert(format_desc->channel[z_swizzle].size == format_desc->block.bits); + } + else { + assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED); + assert(format_desc->channel[z_swizzle].normalized); + assert(!type.fixed); + assert(!type.sign); + assert(type.norm); + } + + /* Setup build context */ + lp_build_context_init(&bld, builder, type); + + dst = LLVMBuildLoad(builder, dst_ptr, ""); + + lp_build_name(dst, "zsbuf"); + + /* Align the source depth bits with the destination's, and mask out any + * stencil or padding bits from both */ + if(format_desc->channel[z_swizzle].size == format_desc->block.bits) { + assert(z_swizzle == 0); + /* nothing to do */ + } + else { + unsigned padding_left; + unsigned padding_right; + unsigned chan; + + assert(format_desc->layout == UTIL_FORMAT_LAYOUT_ARITH); + assert(format_desc->channel[z_swizzle].type == UTIL_FORMAT_TYPE_UNSIGNED); + assert(format_desc->channel[z_swizzle].size <= format_desc->block.bits); + assert(format_desc->channel[z_swizzle].normalized); + + padding_right = 0; + for(chan = 0; chan < z_swizzle; ++chan) + padding_right += format_desc->channel[chan].size; + padding_left = format_desc->block.bits - + (padding_right + format_desc->channel[z_swizzle].size); + + if(padding_left || padding_right) { + const unsigned long long mask_left = ((unsigned long long)1 << (format_desc->block.bits - padding_left)) - 1; + const unsigned long long mask_right = ((unsigned long long)1 << (padding_right)) - 1; + z_bitmask = lp_build_int_const_scalar(type, mask_left ^ mask_right); + } + + if(padding_left) + src = LLVMBuildLShr(builder, src, lp_build_int_const_scalar(type, padding_left), ""); + if(padding_right) + src = LLVMBuildAnd(builder, src, z_bitmask, ""); + if(padding_left || padding_right) + dst = LLVMBuildAnd(builder, dst, z_bitmask, ""); + } + + lp_build_name(dst, "zsbuf.z"); + + test = lp_build_cmp(&bld, state->func, src, dst); + lp_build_mask_update(mask, test); + + if(state->writemask) { + if(z_bitmask) + z_bitmask = LLVMBuildAnd(builder, mask->value, z_bitmask, ""); + else + z_bitmask = mask->value; + + dst = lp_build_select(&bld, z_bitmask, src, dst); + LLVMBuildStore(builder, dst, dst_ptr); + } +} -- cgit v1.2.3