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1 /**************************************************************************
2  *
3  * Copyright 2009 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 above copyright notice and this permission notice (including the
15  * next paragraph) shall be included in all copies or substantial portions
16  * of the Software.
17  *
18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25  *
26  **************************************************************************/
27 
28 /**
29  * @file
30  * Helper functions for type conversions.
31  *
32  * @author Jose Fonseca <jfonseca@vmware.com>
33  */
34 
35 
36 #ifndef LP_BLD_STRUCT_H
37 #define LP_BLD_STRUCT_H
38 
39 
40 #include "gallivm/lp_bld.h"
41 #include "gallivm/lp_bld_init.h"
42 
43 #include "util/u_debug.h"
44 #include "util/u_memory.h"
45 
46 
47 #define LP_CHECK_STRUCT_SIZE(_ctype, _ltarget, _ltype) \
48       assert(LLVMABISizeOfType(_ltarget, _ltype) == \
49              sizeof(_ctype))
50 
51 #define LP_CHECK_MEMBER_OFFSET(_ctype, _cmember, _ltarget, _ltype, _lindex) \
52       assert(LLVMOffsetOfElement(_ltarget, _ltype, _lindex) == \
53              offsetof(_ctype, _cmember))
54 
55 
56 /**
57  * Get value pointer to a structure member.
58  */
59 LLVMValueRef
60 lp_build_struct_get_ptr(struct gallivm_state *gallivm,
61                         LLVMValueRef ptr,
62                         unsigned member,
63                         const char *name);
64 
65 /**
66  * Get the value of a structure member.
67  */
68 LLVMValueRef
69 lp_build_struct_get(struct gallivm_state *gallivm,
70                     LLVMValueRef ptr,
71                     unsigned member,
72                     const char *name);
73 
74 /**
75  * Get value pointer to an array element.
76  */
77 LLVMValueRef
78 lp_build_array_get_ptr(struct gallivm_state *gallivm,
79                        LLVMValueRef ptr,
80                        LLVMValueRef index);
81 
82 /**
83  * Get the value of an array element.
84  */
85 LLVMValueRef
86 lp_build_array_get(struct gallivm_state *gallivm,
87                    LLVMValueRef ptr,
88                    LLVMValueRef index);
89 
90 /**
91  * Set the value of an array element.
92  */
93 void
94 lp_build_array_set(struct gallivm_state *gallivm,
95                    LLVMValueRef ptr,
96                    LLVMValueRef index,
97                    LLVMValueRef value);
98 
99 /**
100  * Get the value of an array element.
101  */
102 LLVMValueRef
103 lp_build_pointer_get(LLVMBuilderRef builder,
104                    LLVMValueRef ptr,
105                    LLVMValueRef index);
106 
107 /**
108  * Get the value of an array element, with explicit alignment.
109  *
110  * If the element size is different from the alignment this will
111  * cause llvm to emit an unaligned load
112  */
113 LLVMValueRef
114 lp_build_pointer_get_unaligned(LLVMBuilderRef builder,
115                                LLVMValueRef ptr,
116                                LLVMValueRef index,
117                                unsigned alignment);
118 
119 /**
120  * Set the value of an array element.
121  */
122 void
123 lp_build_pointer_set(LLVMBuilderRef builder,
124                      LLVMValueRef ptr,
125                      LLVMValueRef index,
126                      LLVMValueRef value);
127 
128 /**
129  * Set the value of an array element, with explicit alignment.
130  *
131  * If the element size is different from the alignment this will
132  * cause llvm to emit an unaligned store
133  */
134 void
135 lp_build_pointer_set_unaligned(LLVMBuilderRef builder,
136                                LLVMValueRef ptr,
137                                LLVMValueRef index,
138                                LLVMValueRef value,
139                                unsigned alignment);
140 
141 #endif /* !LP_BLD_STRUCT_H */
142