mesa/src/gallium/drivers/llvmpipe/lp_bld_swizzle.h

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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 <llvm-c/Core.h>  


struct lp_type;
struct lp_build_context;


LLVMValueRef
lp_build_broadcast(LLVMBuilderRef builder,
                   LLVMTypeRef vec_type,
                   LLVMValueRef scalar);


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


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


/**
 * Swizzle a vector consisting of an array of XYZW structs.
 *
 * @param swizzle is the in [0,4[ range.
 */
LLVMValueRef
lp_build_swizzle1_aos(struct lp_build_context *bld,
                      LLVMValueRef a,
                      const unsigned char swizzle[4]);


/**
 * Swizzle two vector consisting of an array of XYZW structs.
 *
 * @param swizzle is the in [0,8[ range. Values in [4,8[ range refer to b.
 */
LLVMValueRef
lp_build_swizzle2_aos(struct lp_build_context *bld,
                      LLVMValueRef a,
                      LLVMValueRef b,
                      const unsigned char swizzle[4]);


#endif /* !LP_BLD_SWIZZLE_H */