src/gallium/auxiliary/gallivm/lp_bld_swizzle.h

/**************************************************************************
 *
 * Copyright 2009 VMware, Inc.
 * All Rights Reserved.
 *
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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
 * 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
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/**
 * @file
 * Helper functions for swizzling/shuffling.
 *
 * @author Jose Fonseca <jfonseca@vmware.com>
 */


#ifndef LP_BLD_SWIZZLE_H
#define LP_BLD_SWIZZLE_H


#include "gallivm/lp_bld.h"


struct lp_type;
struct lp_build_context;


#define LP_BLD_SWIZZLE_DONTCARE 0xFF


LLVMValueRef
lp_build_broadcast(struct gallivm_state *gallivm,
                   LLVMTypeRef vec_type,
                   LLVMValueRef scalar);


LLVMValueRef
lp_build_broadcast_scalar(struct lp_build_context *bld,
                          LLVMValueRef scalar);


LLVMValueRef
lp_build_extract_broadcast(struct gallivm_state *gallivm,
                           struct lp_type src_type,
                           struct lp_type dst_type,
                           LLVMValueRef vector,
                           LLVMValueRef index);


/**
 * Broadcast one channel of a vector composed of arrays of XYZW structures into
 * all four channel.
 */
LLVMValueRef
lp_build_swizzle_scalar_aos(struct lp_build_context *bld,
                       LLVMValueRef a,
                       unsigned channel);


/**
 * Swizzle a vector consisting of an array of XYZW structs.
 *
 * @param swizzles is the in [0,4[ range.
 */
LLVMValueRef
lp_build_swizzle_aos(struct lp_build_context *bld,
                     LLVMValueRef a,
                     const unsigned char swizzles[4]);


LLVMValueRef
lp_build_swizzle_soa_channel(struct lp_build_context *bld,
                             const LLVMValueRef *unswizzled,
                             unsigned swizzle);


void
lp_build_swizzle_soa(struct lp_build_context *bld,
                     const LLVMValueRef *unswizzled,
                     const unsigned char swizzles[4],
                     LLVMValueRef *swizzled);


void
lp_build_swizzle_soa_inplace(struct lp_build_context *bld,
                             LLVMValueRef *values,
                             const unsigned char swizzles[4]);


void
lp_build_transpose_aos(struct gallivm_state *gallivm,
                       struct lp_type type,
                       const LLVMValueRef src[4],
                       LLVMValueRef dst[4]);


LLVMValueRef
lp_build_pack_aos_scalars(struct gallivm_state *gallivm,
                          struct lp_type src_type,
                          struct lp_type dst_type,
                          const LLVMValueRef src);


LLVMValueRef
lp_build_unpack_broadcast_aos_scalars(struct gallivm_state *gallivm,
                                      struct lp_type src_type,
                                      struct lp_type dst_type,
                                      const LLVMValueRef src);


#endif /* !LP_BLD_SWIZZLE_H */