lp_bld_const.h revision ee16e97ed1d0921c533c77688b278bef393d9922 
1/**************************************************************************
2 *
3 * Copyright 2009 VMware, Inc.
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14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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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
46struct lp_type;
47
48
49unsigned
50lp_mantissa(struct lp_type type);
51
52
53unsigned
54lp_const_shift(struct lp_type type);
55
56
57unsigned
58lp_const_offset(struct lp_type type);
59
60
61double
62lp_const_scale(struct lp_type type);
63
64double
65lp_const_min(struct lp_type type);
66
67
68double
69lp_const_max(struct lp_type type);
70
71
72double
73lp_const_eps(struct lp_type type);
74
75
76LLVMValueRef
77lp_build_undef(struct gallivm_state *gallivm, struct lp_type type);
78
79
80LLVMValueRef
81lp_build_zero(struct gallivm_state *gallivm, struct lp_type type);
82
83
84LLVMValueRef
85lp_build_one(struct gallivm_state *gallivm, struct lp_type type);
86
87
88LLVMValueRef
89lp_build_const_elem(struct gallivm_state *gallivm, struct lp_type type,
90                    double val);
91
92LLVMValueRef
93lp_build_const_vec(struct gallivm_state *gallivm, struct lp_type type,
94                   double val);
95
96
97LLVMValueRef
98lp_build_const_int_vec(struct gallivm_state *gallivm,
99                       struct lp_type type, long long val);
100
101
102LLVMValueRef
103lp_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
108LLVMValueRef
109lp_build_const_mask_aos(struct gallivm_state *gallivm,
110                        struct lp_type type,
111                        unsigned mask);
112
113
114static INLINE LLVMValueRef
115lp_build_const_int32(struct gallivm_state *gallivm, int i)
116{
117   return LLVMConstInt(LLVMInt32TypeInContext(gallivm->context), i, 0);
118}
119
120
121static INLINE LLVMValueRef
122lp_build_const_float(struct gallivm_state *gallivm, float x)
123{
124   return LLVMConstReal(LLVMFloatTypeInContext(gallivm->context), x);
125}
126
127
128/** Return constant-valued pointer to int */
129static INLINE LLVMValueRef
130lp_build_const_int_pointer(struct gallivm_state *gallivm, const void *ptr)
131{
132   LLVMTypeRef int_type;
133   LLVMValueRef v;
134
135   /* int type large enough to hold a pointer */
136   int_type = LLVMIntTypeInContext(gallivm->context, 8 * sizeof(void *));
137   v = LLVMConstInt(int_type, (unsigned long long) ptr, 0);
138   v = LLVMBuildIntToPtr(gallivm->builder, v,
139                         LLVMPointerType(int_type, 0),
140                         "cast int to ptr");
141   return v;
142}
143
144
145
146#endif /* !LP_BLD_CONST_H */
147