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| 5564 | serge | 1 | /************************************************************************** |
| 2 | * |
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| 3 | * Copyright 2010 VMware, Inc. |
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| 4 | * All Rights Reserved. |
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| 5 | * |
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| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 7 | * copy of this software and associated documentation files (the |
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| 8 | * "Software"), to deal in the Software without restriction, including |
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| 9 | * without limitation the rights to use, copy, modify, merge, publish, |
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| 10 | * distribute, sub license, and/or sell copies of the Software, and to |
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| 11 | * permit persons to whom the Software is furnished to do so, subject to |
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| 12 | * the following conditions: |
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| 13 | * |
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| 14 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 15 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 16 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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| 17 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, |
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| 18 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR |
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| 19 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE |
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| 20 | * USE OR OTHER DEALINGS IN THE SOFTWARE. |
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| 21 | * |
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| 22 | * The above copyright notice and this permission notice (including the |
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| 23 | * next paragraph) shall be included in all copies or substantial portions |
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| 24 | * of the Software. |
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| 25 | * |
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| 26 | **************************************************************************/ |
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| 27 | |||
| 28 | |||
| 29 | #ifndef LP_BLD_QUAD_H_ |
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| 30 | #define LP_BLD_QUAD_H_ |
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| 31 | |||
| 32 | |||
| 33 | #include "gallivm/lp_bld.h" |
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| 34 | |||
| 35 | |||
| 36 | struct lp_build_context; |
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| 37 | |||
| 38 | |||
| 39 | /* |
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| 40 | * Each quad is composed of four elements. |
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| 41 | * |
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| 42 | * ######### |
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| 43 | * # 0 | 1 # |
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| 44 | * #---+---# |
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| 45 | * # 2 | 3 # |
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| 46 | * ######### |
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| 47 | */ |
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| 48 | |||
| 49 | enum lp_bld_quad { |
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| 50 | LP_BLD_QUAD_TOP_LEFT = 0, |
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| 51 | LP_BLD_QUAD_TOP_RIGHT = 1, |
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| 52 | LP_BLD_QUAD_BOTTOM_LEFT = 2, |
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| 53 | LP_BLD_QUAD_BOTTOM_RIGHT = 3 |
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| 54 | }; |
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| 55 | |||
| 56 | |||
| 57 | /* |
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| 58 | * (Vector) derivates. |
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| 59 | * |
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| 60 | * More than one quad is supported. The only requirement is that the vector |
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| 61 | * contains a whole number of quads: |
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| 62 | * |
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| 63 | * ######### ######### ... |
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| 64 | * # 0 | 1 # # 4 | 5 # |
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| 65 | * #---+---# #---+---# ... |
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| 66 | * # 2 | 3 # # 6 | 7 # |
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| 67 | * ######### ######### ... |
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| 68 | */ |
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| 69 | |||
| 70 | LLVMValueRef |
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| 71 | lp_build_ddx(struct lp_build_context *bld, |
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| 72 | LLVMValueRef a); |
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| 73 | |||
| 74 | |||
| 75 | LLVMValueRef |
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| 76 | lp_build_ddy(struct lp_build_context *bld, |
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| 77 | LLVMValueRef a); |
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| 78 | |||
| 79 | |||
| 80 | /* |
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| 81 | * Packed derivatives (one derivative for each direction per quad) |
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| 82 | */ |
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| 83 | LLVMValueRef |
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| 84 | lp_build_packed_ddx_ddy_twocoord(struct lp_build_context *bld, |
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| 85 | LLVMValueRef a, LLVMValueRef b); |
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| 86 | |||
| 87 | LLVMValueRef |
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| 88 | lp_build_packed_ddx_ddy_onecoord(struct lp_build_context *bld, |
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| 89 | LLVMValueRef a); |
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| 90 | |||
| 91 | /* |
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| 92 | * Twiddle from quad format to row format |
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| 93 | */ |
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| 94 | void |
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| 95 | lp_bld_quad_twiddle(struct gallivm_state *gallivm, |
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| 96 | struct lp_type lp_dst_type, |
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| 97 | const LLVMValueRef* src, |
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| 98 | unsigned src_count, |
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| 99 | LLVMValueRef* dst); |
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| 100 | |||
| 101 | #endif /* LP_BLD_QUAD_H_ */ |