1 /**************************************************************************
3 * Copyright 2010 VMware, Inc.
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:
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.
22 * The above copyright notice and this permission notice (including the
23 * next paragraph) shall be included in all copies or substantial portions
26 **************************************************************************/
29 #include "lp_bld_type.h"
30 #include "lp_bld_arit.h"
31 #include "lp_bld_swizzle.h"
32 #include "lp_bld_quad.h"
35 static const unsigned char
37 LP_BLD_QUAD_TOP_LEFT
, LP_BLD_QUAD_TOP_LEFT
,
38 LP_BLD_QUAD_BOTTOM_LEFT
, LP_BLD_QUAD_BOTTOM_LEFT
41 static const unsigned char
43 LP_BLD_QUAD_TOP_RIGHT
, LP_BLD_QUAD_TOP_RIGHT
,
44 LP_BLD_QUAD_BOTTOM_RIGHT
, LP_BLD_QUAD_BOTTOM_RIGHT
47 static const unsigned char
49 LP_BLD_QUAD_TOP_LEFT
, LP_BLD_QUAD_TOP_RIGHT
,
50 LP_BLD_QUAD_TOP_LEFT
, LP_BLD_QUAD_TOP_RIGHT
53 static const unsigned char
55 LP_BLD_QUAD_BOTTOM_LEFT
, LP_BLD_QUAD_BOTTOM_RIGHT
,
56 LP_BLD_QUAD_BOTTOM_LEFT
, LP_BLD_QUAD_BOTTOM_RIGHT
61 lp_build_ddx(struct lp_build_context
*bld
,
64 LLVMValueRef a_left
= lp_build_swizzle_aos(bld
, a
, swizzle_left
);
65 LLVMValueRef a_right
= lp_build_swizzle_aos(bld
, a
, swizzle_right
);
66 return lp_build_sub(bld
, a_right
, a_left
);
71 lp_build_ddy(struct lp_build_context
*bld
,
74 LLVMValueRef a_top
= lp_build_swizzle_aos(bld
, a
, swizzle_top
);
75 LLVMValueRef a_bottom
= lp_build_swizzle_aos(bld
, a
, swizzle_bottom
);
76 return lp_build_sub(bld
, a_bottom
, a_top
);
81 lp_build_scalar_ddx(struct lp_build_context
*bld
,
84 LLVMTypeRef i32t
= LLVMInt32Type();
85 LLVMValueRef idx_left
= LLVMConstInt(i32t
, LP_BLD_QUAD_TOP_LEFT
, 0);
86 LLVMValueRef idx_right
= LLVMConstInt(i32t
, LP_BLD_QUAD_TOP_RIGHT
, 0);
87 LLVMValueRef a_left
= LLVMBuildExtractElement(bld
->builder
, a
, idx_left
, "left");
88 LLVMValueRef a_right
= LLVMBuildExtractElement(bld
->builder
, a
, idx_right
, "right");
89 if (bld
->type
.floating
)
90 return LLVMBuildFSub(bld
->builder
, a_right
, a_left
, "ddx");
92 return LLVMBuildSub(bld
->builder
, a_right
, a_left
, "ddx");
97 lp_build_scalar_ddy(struct lp_build_context
*bld
,
100 LLVMTypeRef i32t
= LLVMInt32Type();
101 LLVMValueRef idx_top
= LLVMConstInt(i32t
, LP_BLD_QUAD_TOP_LEFT
, 0);
102 LLVMValueRef idx_bottom
= LLVMConstInt(i32t
, LP_BLD_QUAD_BOTTOM_LEFT
, 0);
103 LLVMValueRef a_top
= LLVMBuildExtractElement(bld
->builder
, a
, idx_top
, "top");
104 LLVMValueRef a_bottom
= LLVMBuildExtractElement(bld
->builder
, a
, idx_bottom
, "bottom");
105 if (bld
->type
.floating
)
106 return LLVMBuildFSub(bld
->builder
, a_bottom
, a_top
, "ddy");
108 return LLVMBuildSub(bld
->builder
, a_bottom
, a_top
, "ddy");