llvmpipe: Pixel packing/unpacking and loop code generators.
Just a small proof of concept plus a standalone test app. Not integrated with the rest of the driver yet.
This commit is contained in:
José Fonseca
@@ -7,6 +7,9 @@ C_SOURCES = \
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lp_fs_exec.c \
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lp_fs_sse.c \
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lp_fs_llvm.c \
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lp_bld_pack.c \
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lp_bld_unpack.c \
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lp_bld_loop.c \
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lp_clear.c \
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lp_flush.c \
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lp_query.c \
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@@ -2,12 +2,17 @@ Import('*')
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env = env.Clone()
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env.ParseConfig('llvm-config --cflags --libs jit interpreter nativecodegen')
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llvmpipe = env.ConvenienceLibrary(
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target = 'llvmpipe',
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source = [
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'lp_fs_exec.c',
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'lp_fs_sse.c',
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'lp_fs_llvm.c',
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'lp_bld_pack.c',
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'lp_bld_unpack.c',
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'lp_bld_loop.c',
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'lp_clear.c',
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'lp_context.c',
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'lp_draw_arrays.c',
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@@ -43,4 +48,12 @@ llvmpipe = env.ConvenienceLibrary(
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'lp_tile_cache.c',
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])
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Export('softpipe')
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env['LINK'] = env['CXX']
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env.Program(
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target = 'lp_bld_test',
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source = ['lp_bld_test.c'],
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LIBS = [llvmpipe] + auxiliaries + env['LIBS'],
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)
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Export('llvmpipe')
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@@ -0,0 +1,94 @@
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/**************************************************************************
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*
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* Copyright 2009 Vmware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* 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
|
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* next paragraph) shall be included in all copies or substantial portions
|
||||
* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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||||
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef LP_BLD_H
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#define LP_BLD_H
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/**
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* @file
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* LLVM IR building helpers interfaces.
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*
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* We use LLVM-C bindings for now. They are not documented, but follow the C++
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* interfaces very closely, and appear to be complete enough for code
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* genration. See
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* http://npcontemplation.blogspot.com/2008/06/secret-of-llvm-c-bindings.html
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* for a standalone example.
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*/
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#include <llvm-c/Core.h>
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#include "pipe/p_format.h"
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/**
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* Unpack a pixel into its RGBA components.
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*
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* @param ptr value with the pointer to the packed pixel. Pointer type is
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* irrelevant.
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*
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* @return RGBA in a 4 floats vector.
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*/
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LLVMValueRef
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lp_build_unpack_rgba(LLVMBuilderRef builder,
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enum pipe_format format,
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LLVMValueRef ptr);
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/**
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* Pack a pixel.
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*
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* @param rgba 4 float vector with the unpacked components.
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*/
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void
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lp_build_pack_rgba(LLVMBuilderRef builder,
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enum pipe_format format,
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LLVMValueRef ptr,
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LLVMValueRef rgba);
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struct lp_build_loop_state
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{
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LLVMBasicBlockRef block;
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LLVMValueRef counter;
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};
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void
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lp_build_loop_begin(LLVMBuilderRef builder,
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LLVMValueRef start,
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struct lp_build_loop_state *state);
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void
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lp_build_loop_end(LLVMBuilderRef builder,
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LLVMValueRef end,
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LLVMValueRef step,
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struct lp_build_loop_state *state);
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#endif /* !LP_BLD_H */
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@@ -0,0 +1,91 @@
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/**************************************************************************
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*
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* Copyright 2009 Vmware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* 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, sub license, 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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*
|
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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 portions
|
||||
* of the Software.
|
||||
*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
||||
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
|
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
|
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#include "lp_bld.h"
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/**
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* @file
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* Auxiliaries to build loops.
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*
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* LLVM's IR doesn't represent for-loops directly. Furthermore it
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* it requires creating code blocks, branches, phi variables, so it
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* requires a fair amount of code.
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*
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* @sa http://www.llvm.org/docs/tutorial/LangImpl5.html#for
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*/
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void
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lp_build_loop_begin(LLVMBuilderRef builder,
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LLVMValueRef start,
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struct lp_build_loop_state *state)
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{
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LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
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LLVMValueRef function = LLVMGetBasicBlockParent(block);
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state->block = LLVMAppendBasicBlock(function, "loop");
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LLVMBuildBr(builder, state->block);
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LLVMPositionBuilderAtEnd(builder, state->block);
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state->counter = LLVMBuildPhi(builder, LLVMTypeOf(start), "");
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LLVMAddIncoming(state->counter, &start, &block, 1);
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}
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void
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lp_build_loop_end(LLVMBuilderRef builder,
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LLVMValueRef end,
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LLVMValueRef step,
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struct lp_build_loop_state *state)
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{
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LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
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LLVMValueRef function = LLVMGetBasicBlockParent(block);
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LLVMValueRef next;
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LLVMValueRef cond;
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LLVMBasicBlockRef after_block;
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if (!step)
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step = LLVMConstInt(LLVMTypeOf(end), 1, 0);
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next = LLVMBuildAdd(builder, state->counter, step, "");
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cond = LLVMBuildICmp(builder, LLVMIntNE, next, end, "");
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after_block = LLVMAppendBasicBlock(function, "");
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LLVMBuildCondBr(builder, cond, after_block, state->block);
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LLVMAddIncoming(state->counter, &next, &block, 1);
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LLVMPositionBuilderAtEnd(builder, after_block);
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}
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@@ -0,0 +1,132 @@
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/**************************************************************************
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*
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* Copyright 2009 Vmware, Inc.
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
|
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* 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
|
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* the following conditions:
|
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*
|
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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 portions
|
||||
* of the Software.
|
||||
*
|
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* 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.
|
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*
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**************************************************************************/
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#include "util/u_format.h"
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#include "lp_bld.h"
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void
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lp_build_pack_rgba(LLVMBuilderRef builder,
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enum pipe_format format,
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LLVMValueRef ptr,
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LLVMValueRef rgba)
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{
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const struct util_format_description *desc;
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LLVMTypeRef type;
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LLVMValueRef packed = NULL;
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unsigned shift = 0;
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unsigned i, j;
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desc = util_format_description(format);
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assert(desc->layout == UTIL_FORMAT_LAYOUT_RGBA);
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assert(desc->block.width == 1);
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assert(desc->block.height == 1);
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type = LLVMIntType(desc->block.bits);
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LLVMValueRef swizzles[4];
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LLVMValueRef shifted, casted, scaled, unswizzled;
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/* Unswizzle the color components into the source vector. */
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for (i = 0; i < 4; ++i) {
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for (j = 0; j < 4; ++j) {
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if (desc->swizzle[j] == i)
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break;
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}
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if (j < 4)
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swizzles[i] = LLVMConstInt(LLVMInt32Type(), j, 0);
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else
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swizzles[i] = LLVMGetUndef(LLVMInt32Type());
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}
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unswizzled = LLVMBuildShuffleVector(builder, rgba,
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LLVMGetUndef(LLVMVectorType(LLVMFloatType(), 4)),
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LLVMConstVector(swizzles, 4), "");
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LLVMValueRef shifts[4];
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LLVMValueRef scales[4];
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bool normalized = FALSE;
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for (i = 0; i < 4; ++i) {
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unsigned bits = desc->channel[i].size;
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if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) {
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shifts[i] = LLVMGetUndef(LLVMInt32Type());
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scales[i] = LLVMGetUndef(LLVMFloatType());
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}
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else {
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unsigned mask = (1 << bits) - 1;
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assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED);
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assert(bits < 32);
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shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0);
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if (desc->channel[i].normalized) {
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scales[i] = LLVMConstReal(LLVMFloatType(), mask);
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normalized = TRUE;
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}
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else
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scales[i] = LLVMConstReal(LLVMFloatType(), 1.0);
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}
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shift += bits;
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}
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if (normalized)
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scaled = LLVMBuildMul(builder, unswizzled, LLVMConstVector(scales, 4), "");
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else
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scaled = unswizzled;
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casted = LLVMBuildFPToSI(builder, scaled, LLVMVectorType(LLVMInt32Type(), 4), "");
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shifted = LLVMBuildShl(builder, casted, LLVMConstVector(shifts, 4), "");
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/* Bitwise or all components */
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for (i = 0; i < 4; ++i) {
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if (desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED) {
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LLVMValueRef component = LLVMBuildExtractElement(builder, shifted, LLVMConstInt(LLVMInt32Type(), i, 0), "");
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if (packed)
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packed = LLVMBuildOr(builder, packed, component, "");
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else
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packed = component;
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}
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}
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|
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if (packed) {
|
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|
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if (desc->block.bits < 32)
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packed = LLVMBuildTrunc(builder, packed, type, "");
|
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|
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LLVMBuildStore(builder, packed, LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), ""));
|
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}
|
||||
}
|
||||
|
||||
@@ -0,0 +1,199 @@
|
||||
/**************************************************************************
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
**************************************************************************/
|
||||
|
||||
|
||||
#include <stdlib.h>
|
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#include <stdio.h>
|
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|
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#include <llvm-c/Core.h>
|
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#include <llvm-c/Analysis.h>
|
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#include <llvm-c/ExecutionEngine.h>
|
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#include <llvm-c/Target.h>
|
||||
#include <llvm-c/Transforms/Scalar.h>
|
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|
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#include "lp_bld.h"
|
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|
||||
|
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static LLVMValueRef
|
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add_unpack_rgba_test(LLVMModuleRef module,
|
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enum pipe_format format)
|
||||
{
|
||||
LLVMTypeRef args[] = {
|
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LLVMPointerType(LLVMInt8Type(), 0),
|
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LLVMPointerType(LLVMVectorType(LLVMFloatType(), 4), 0)
|
||||
};
|
||||
LLVMValueRef func = LLVMAddFunction(module, "unpack", LLVMFunctionType(LLVMVoidType(), args, 2, 0));
|
||||
LLVMSetFunctionCallConv(func, LLVMCCallConv);
|
||||
LLVMValueRef ptr = LLVMGetParam(func, 0);
|
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LLVMValueRef rgba_ptr = LLVMGetParam(func, 1);
|
||||
|
||||
LLVMBasicBlockRef block = LLVMAppendBasicBlock(func, "entry");
|
||||
LLVMBuilderRef builder = LLVMCreateBuilder();
|
||||
LLVMPositionBuilderAtEnd(builder, block);
|
||||
|
||||
LLVMValueRef rgba;
|
||||
|
||||
struct lp_build_loop_state loop;
|
||||
|
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lp_build_loop_begin(builder, LLVMConstInt(LLVMInt32Type(), 1, 0), &loop);
|
||||
|
||||
rgba = lp_build_unpack_rgba(builder, format, ptr);
|
||||
LLVMBuildStore(builder, rgba, rgba_ptr);
|
||||
|
||||
lp_build_loop_end(builder, LLVMConstInt(LLVMInt32Type(), 4, 0), NULL, &loop);
|
||||
|
||||
LLVMBuildRetVoid(builder);
|
||||
|
||||
LLVMDisposeBuilder(builder);
|
||||
return func;
|
||||
}
|
||||
|
||||
|
||||
static LLVMValueRef
|
||||
add_pack_rgba_test(LLVMModuleRef module,
|
||||
enum pipe_format format)
|
||||
{
|
||||
LLVMTypeRef args[] = {
|
||||
LLVMPointerType(LLVMInt8Type(), 0),
|
||||
LLVMPointerType(LLVMVectorType(LLVMFloatType(), 4), 0)
|
||||
};
|
||||
LLVMValueRef func = LLVMAddFunction(module, "pack", LLVMFunctionType(LLVMVoidType(), args, 2, 0));
|
||||
LLVMSetFunctionCallConv(func, LLVMCCallConv);
|
||||
LLVMValueRef ptr = LLVMGetParam(func, 0);
|
||||
LLVMValueRef rgba_ptr = LLVMGetParam(func, 1);
|
||||
|
||||
LLVMBasicBlockRef block = LLVMAppendBasicBlock(func, "entry");
|
||||
LLVMBuilderRef builder = LLVMCreateBuilder();
|
||||
LLVMPositionBuilderAtEnd(builder, block);
|
||||
|
||||
LLVMValueRef rgba;
|
||||
|
||||
rgba = LLVMBuildLoad(builder, rgba_ptr, "");
|
||||
|
||||
lp_build_pack_rgba(builder, format, ptr, rgba);
|
||||
|
||||
LLVMBuildRetVoid(builder);
|
||||
|
||||
LLVMDisposeBuilder(builder);
|
||||
return func;
|
||||
}
|
||||
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
char *error = NULL;
|
||||
int n;
|
||||
|
||||
if (argc > 1)
|
||||
sscanf(argv[1], "%x", &n);
|
||||
else
|
||||
n = 0x0000f0f0;
|
||||
|
||||
LLVMModuleRef module = LLVMModuleCreateWithName("test");
|
||||
|
||||
enum pipe_format format;
|
||||
format = PIPE_FORMAT_R5G6B5_UNORM;
|
||||
LLVMValueRef unpack = add_unpack_rgba_test(module, format);
|
||||
LLVMValueRef pack = add_pack_rgba_test(module, format);
|
||||
|
||||
LLVMVerifyModule(module, LLVMAbortProcessAction, &error);
|
||||
LLVMDisposeMessage(error);
|
||||
|
||||
LLVMExecutionEngineRef engine;
|
||||
LLVMModuleProviderRef provider = LLVMCreateModuleProviderForExistingModule(module);
|
||||
error = NULL;
|
||||
LLVMCreateJITCompiler(&engine, provider, 1, &error);
|
||||
if (error) {
|
||||
fprintf(stderr, "%s\n", error);
|
||||
LLVMDisposeMessage(error);
|
||||
abort();
|
||||
}
|
||||
|
||||
LLVMPassManagerRef pass = LLVMCreatePassManager();
|
||||
#if 0
|
||||
LLVMAddTargetData(LLVMGetExecutionEngineTargetData(engine), pass);
|
||||
/* These are the passes currently listed in llvm-c/Transforms/Scalar.h,
|
||||
* but there are more on SVN. */
|
||||
LLVMAddConstantPropagationPass(pass);
|
||||
LLVMAddInstructionCombiningPass(pass);
|
||||
LLVMAddPromoteMemoryToRegisterPass(pass);
|
||||
LLVMAddDemoteMemoryToRegisterPass(pass);
|
||||
LLVMAddGVNPass(pass);
|
||||
LLVMAddCFGSimplificationPass(pass);
|
||||
LLVMRunPassManager(pass, module);
|
||||
#endif
|
||||
LLVMDumpModule(module);
|
||||
|
||||
printf("Packed: %08x\n", n);
|
||||
|
||||
float rgba[4] = {0, 0, 0, 0};
|
||||
|
||||
{
|
||||
#if 1
|
||||
typedef void (*unpack_ptr_t)(void *, float *);
|
||||
unpack_ptr_t unpack_ptr = (unpack_ptr_t)LLVMGetPointerToGlobal(engine, unpack);
|
||||
|
||||
unpack_ptr(&n, rgba);
|
||||
#else
|
||||
LLVMGenericValueRef exec_args[] = {
|
||||
LLVMCreateGenericValueOfPointer(n),
|
||||
LLVMCreateGenericValueOfPointer(rgba)
|
||||
};
|
||||
LLVMGenericValueRef exec_res = LLVMRunFunction(engine, unpack, 2, exec_args);
|
||||
#endif
|
||||
|
||||
printf("Unpacked: %f %f %f %f\n",
|
||||
rgba[0],
|
||||
rgba[1],
|
||||
rgba[2],
|
||||
rgba[3]);
|
||||
}
|
||||
|
||||
n = 0;
|
||||
|
||||
{
|
||||
#if 1
|
||||
typedef void (*pack_ptr_t)(void *, float *);
|
||||
pack_ptr_t pack_ptr = (pack_ptr_t)LLVMGetPointerToGlobal(engine, pack);
|
||||
|
||||
pack_ptr(&n, rgba);
|
||||
#else
|
||||
LLVMGenericValueRef exec_args[] = {
|
||||
LLVMCreateGenericValueOfPointer(n),
|
||||
LLVMCreateGenericValueOfPointer(rgba)
|
||||
};
|
||||
LLVMGenericValueRef exec_res = LLVMRunFunction(engine, pack, 2, exec_args);
|
||||
#endif
|
||||
|
||||
printf("Packed: %08x\n", n);
|
||||
}
|
||||
|
||||
LLVMDisposePassManager(pass);
|
||||
LLVMDisposeExecutionEngine(engine);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@@ -0,0 +1,156 @@
|
||||
/**************************************************************************
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
**************************************************************************/
|
||||
|
||||
|
||||
#include "util/u_format.h"
|
||||
|
||||
#include "lp_bld.h"
|
||||
|
||||
|
||||
LLVMValueRef
|
||||
lp_build_unpack_rgba(LLVMBuilderRef builder,
|
||||
enum pipe_format format,
|
||||
LLVMValueRef ptr)
|
||||
{
|
||||
const struct util_format_description *desc;
|
||||
LLVMTypeRef type;
|
||||
LLVMValueRef deferred;
|
||||
unsigned shift = 0;
|
||||
unsigned i;
|
||||
|
||||
desc = util_format_description(format);
|
||||
|
||||
/* FIXME: Support more formats */
|
||||
assert(desc->layout == UTIL_FORMAT_LAYOUT_RGBA);
|
||||
assert(desc->block.width == 1);
|
||||
assert(desc->block.height == 1);
|
||||
assert(desc->block.bits <= 32);
|
||||
|
||||
type = LLVMIntType(desc->block.bits);
|
||||
|
||||
deferred = LLVMBuildLoad(builder, LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, 0), ""), "");
|
||||
|
||||
/* Do the intermediate integer computations with 32bit integers since it
|
||||
* matches floating point size */
|
||||
if (desc->block.bits < 32)
|
||||
deferred = LLVMBuildZExt(builder, deferred, LLVMInt32Type(), "");
|
||||
|
||||
/* Broadcast the packed value to all four channels */
|
||||
deferred = LLVMBuildInsertElement(builder,
|
||||
LLVMGetUndef(LLVMVectorType(LLVMInt32Type(), 4)),
|
||||
deferred,
|
||||
LLVMConstNull(LLVMInt32Type()),
|
||||
"");
|
||||
deferred = LLVMBuildShuffleVector(builder,
|
||||
deferred,
|
||||
LLVMGetUndef(LLVMVectorType(LLVMInt32Type(), 4)),
|
||||
LLVMConstNull(LLVMVectorType(LLVMInt32Type(), 4)),
|
||||
"");
|
||||
|
||||
LLVMValueRef shifted, casted, scaled, masked, swizzled;
|
||||
LLVMValueRef shifts[4];
|
||||
LLVMValueRef masks[4];
|
||||
LLVMValueRef scales[4];
|
||||
bool normalized = FALSE;
|
||||
int empty_channel = -1;
|
||||
|
||||
/* Initialize vector constants */
|
||||
for (i = 0; i < 4; ++i) {
|
||||
unsigned bits = desc->channel[i].size;
|
||||
|
||||
if (desc->channel[i].type == UTIL_FORMAT_TYPE_VOID) {
|
||||
shifts[i] = LLVMGetUndef(LLVMInt32Type());
|
||||
masks[i] = LLVMConstNull(LLVMInt32Type());
|
||||
scales[i] = LLVMConstNull(LLVMFloatType());
|
||||
empty_channel = i;
|
||||
}
|
||||
else {
|
||||
unsigned mask = (1 << bits) - 1;
|
||||
|
||||
assert(desc->channel[i].type == UTIL_FORMAT_TYPE_UNSIGNED);
|
||||
assert(bits < 32);
|
||||
|
||||
shifts[i] = LLVMConstInt(LLVMInt32Type(), shift, 0);
|
||||
masks[i] = LLVMConstInt(LLVMInt32Type(), mask, 0);
|
||||
|
||||
if (desc->channel[i].normalized) {
|
||||
scales[i] = LLVMConstReal(LLVMFloatType(), 1.0/mask);
|
||||
normalized = TRUE;
|
||||
}
|
||||
else
|
||||
scales[i] = LLVMConstReal(LLVMFloatType(), 1.0);
|
||||
}
|
||||
|
||||
shift += bits;
|
||||
}
|
||||
|
||||
shifted = LLVMBuildLShr(builder, deferred, LLVMConstVector(shifts, 4), "");
|
||||
masked = LLVMBuildAnd(builder, shifted, LLVMConstVector(masks, 4), "");
|
||||
// UIToFP can't be expressed in SSE2
|
||||
casted = LLVMBuildSIToFP(builder, masked, LLVMVectorType(LLVMFloatType(), 4), "");
|
||||
|
||||
if (normalized)
|
||||
scaled = LLVMBuildMul(builder, casted, LLVMConstVector(scales, 4), "");
|
||||
else
|
||||
scaled = casted;
|
||||
|
||||
LLVMValueRef swizzles[4];
|
||||
LLVMValueRef aux[4];
|
||||
|
||||
for (i = 0; i < 4; ++i)
|
||||
aux[i] = LLVMGetUndef(LLVMFloatType());
|
||||
|
||||
for (i = 0; i < 4; ++i) {
|
||||
enum util_format_swizzle swizzle = desc->swizzle[i];
|
||||
|
||||
switch (swizzle) {
|
||||
case UTIL_FORMAT_SWIZZLE_X:
|
||||
case UTIL_FORMAT_SWIZZLE_Y:
|
||||
case UTIL_FORMAT_SWIZZLE_Z:
|
||||
case UTIL_FORMAT_SWIZZLE_W:
|
||||
swizzles[i] = LLVMConstInt(LLVMInt32Type(), swizzle, 0);
|
||||
break;
|
||||
case UTIL_FORMAT_SWIZZLE_0:
|
||||
assert(empty_channel >= 0);
|
||||
swizzles[i] = LLVMConstInt(LLVMInt32Type(), empty_channel, 0);
|
||||
break;
|
||||
case UTIL_FORMAT_SWIZZLE_1:
|
||||
swizzles[i] = LLVMConstInt(LLVMInt32Type(), 4, 0);
|
||||
aux[0] = LLVMConstReal(LLVMFloatType(), 1.0);
|
||||
break;
|
||||
case UTIL_FORMAT_SWIZZLE_NONE:
|
||||
swizzles[i] = LLVMGetUndef(LLVMFloatType());
|
||||
assert(0);
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
swizzled = LLVMBuildShuffleVector(builder, scaled, LLVMConstVector(aux, 4), LLVMConstVector(swizzles, 4), "");
|
||||
|
||||
return swizzled;
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user