1 /************************************************************************** 2 * 3 * Copyright 2010 VMware, Inc. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the 8 * "Software"), to deal in the Software without restriction, including 9 * without limitation the rights to use, copy, modify, merge, publish, 10 * distribute, sub license, and/or sell copies of the Software, and to 11 * permit persons to whom the Software is furnished to do so, subject to 12 * the following conditions: 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 18 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 19 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 20 * USE OR OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * The above copyright notice and this permission notice (including the 23 * next paragraph) shall be included in all copies or substantial portions 24 * of the Software. 25 * 26 **************************************************************************/ 27 28 29 #ifndef LP_BLD_QUAD_H_ 30 #define LP_BLD_QUAD_H_ 31 32 33 #include "gallivm/lp_bld.h" 34 35 36 struct lp_build_context; 37 38 39 /* 40 * Each quad is composed of four elements. 41 * 42 * ######### 43 * # 0 | 1 # 44 * #---+---# 45 * # 2 | 3 # 46 * ######### 47 */ 48 49 enum lp_bld_quad { 50 LP_BLD_QUAD_TOP_LEFT = 0, 51 LP_BLD_QUAD_TOP_RIGHT = 1, 52 LP_BLD_QUAD_BOTTOM_LEFT = 2, 53 LP_BLD_QUAD_BOTTOM_RIGHT = 3 54 }; 55 56 57 /* 58 * (Vector) derivates. 59 * 60 * More than one quad is supported. The only requirement is that the vector 61 * contains a whole number of quads: 62 * 63 * ######### ######### ... 64 * # 0 | 1 # # 4 | 5 # 65 * #---+---# #---+---# ... 66 * # 2 | 3 # # 6 | 7 # 67 * ######### ######### ... 68 */ 69 70 LLVMValueRef 71 lp_build_ddx(struct lp_build_context *bld, 72 LLVMValueRef a); 73 74 75 LLVMValueRef 76 lp_build_ddy(struct lp_build_context *bld, 77 LLVMValueRef a); 78 79 80 /* 81 * Packed derivatives (one derivative for each direction per quad) 82 */ 83 LLVMValueRef 84 lp_build_packed_ddx_ddy_twocoord(struct lp_build_context *bld, 85 LLVMValueRef a, LLVMValueRef b); 86 87 LLVMValueRef 88 lp_build_packed_ddx_ddy_onecoord(struct lp_build_context *bld, 89 LLVMValueRef a); 90 91 /* 92 * Twiddle from quad format to row format 93 */ 94 void 95 lp_bld_quad_twiddle(struct gallivm_state *gallivm, 96 struct lp_type lp_dst_type, 97 const LLVMValueRef* src, 98 unsigned src_count, 99 LLVMValueRef* dst); 100 101 #endif /* LP_BLD_QUAD_H_ */ 102