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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 constant building.
31  *
32  * @author Jose Fonseca <jfonseca@vmware.com>
33  */
34 
35 
36 #ifndef LP_BLD_CONST_H
37 #define LP_BLD_CONST_H
38 
39 
40 #include "pipe/p_compiler.h"
41 #include "gallivm/lp_bld.h"
42 #include "gallivm/lp_bld_init.h"
43 
44 
45 
46 struct lp_type;
47 
48 
49 unsigned
50 lp_mantissa(struct lp_type type);
51 
52 
53 unsigned
54 lp_const_shift(struct lp_type type);
55 
56 
57 unsigned
58 lp_const_offset(struct lp_type type);
59 
60 
61 double
62 lp_const_scale(struct lp_type type);
63 
64 double
65 lp_const_min(struct lp_type type);
66 
67 
68 double
69 lp_const_max(struct lp_type type);
70 
71 
72 double
73 lp_const_eps(struct lp_type type);
74 
75 
76 LLVMValueRef
77 lp_build_undef(struct gallivm_state *gallivm, struct lp_type type);
78 
79 
80 LLVMValueRef
81 lp_build_zero(struct gallivm_state *gallivm, struct lp_type type);
82 
83 
84 LLVMValueRef
85 lp_build_one(struct gallivm_state *gallivm, struct lp_type type);
86 
87 
88 LLVMValueRef
89 lp_build_const_elem(struct gallivm_state *gallivm, struct lp_type type,
90                     double val);
91 
92 LLVMValueRef
93 lp_build_const_vec(struct gallivm_state *gallivm, struct lp_type type,
94                    double val);
95 
96 
97 LLVMValueRef
98 lp_build_const_int_vec(struct gallivm_state *gallivm,
99                        struct lp_type type, long long val);
100 
101 
102 LLVMValueRef
103 lp_build_const_aos(struct gallivm_state *gallivm, struct lp_type type,
104                    double r, double g, double b, double a,
105                    const unsigned char *swizzle);
106 
107 
108 LLVMValueRef
109 lp_build_const_mask_aos(struct gallivm_state *gallivm,
110                         struct lp_type type,
111                         unsigned mask,
112                         unsigned channels);
113 
114 
115 LLVMValueRef
116 lp_build_const_mask_aos_swizzled(struct gallivm_state *gallivm,
117                                  struct lp_type type,
118                                  unsigned mask,
119                                  unsigned channels,
120                                  const unsigned char *swizzle);
121 
122 
123 static inline LLVMValueRef
lp_build_const_int32(struct gallivm_state * gallivm,int i)124 lp_build_const_int32(struct gallivm_state *gallivm, int i)
125 {
126    return LLVMConstInt(LLVMInt32TypeInContext(gallivm->context), i, 0);
127 }
128 
129 
130 static inline LLVMValueRef
lp_build_const_float(struct gallivm_state * gallivm,float x)131 lp_build_const_float(struct gallivm_state *gallivm, float x)
132 {
133    return LLVMConstReal(LLVMFloatTypeInContext(gallivm->context), x);
134 }
135 
136 
137 /** Return constant-valued pointer to int */
138 static inline LLVMValueRef
lp_build_const_int_pointer(struct gallivm_state * gallivm,const void * ptr)139 lp_build_const_int_pointer(struct gallivm_state *gallivm, const void *ptr)
140 {
141    LLVMTypeRef int_type;
142    LLVMValueRef v;
143 
144    /* int type large enough to hold a pointer */
145    int_type = LLVMIntTypeInContext(gallivm->context, 8 * sizeof(void *));
146    v = LLVMConstInt(int_type, (uintptr_t) ptr, 0);
147    v = LLVMBuildIntToPtr(gallivm->builder, v,
148                          LLVMPointerType(int_type, 0),
149                          "cast int to ptr");
150    return v;
151 }
152 
153 
154 LLVMValueRef
155 lp_build_const_string(struct gallivm_state *gallivm,
156                       const char *str);
157 
158 
159 LLVMValueRef
160 lp_build_const_func_pointer(struct gallivm_state *gallivm,
161                             const void *ptr,
162                             LLVMTypeRef ret_type,
163                             LLVMTypeRef *arg_types,
164                             unsigned num_args,
165                             const char *name);
166 
167 
168 #endif /* !LP_BLD_CONST_H */
169