workbench/libs/mesa/src/gallium/auxiliary/gallivm/lp_bld_const.h

   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
 113
 114 static INLINE LLVMValueRef
 115 lp_build_const_int32(struct gallivm_state *gallivm, int i)
 116 {
 117    return LLVMConstInt(LLVMInt32TypeInContext(gallivm->context), i, 0);
 118 }
 119
 120
 121 static INLINE LLVMValueRef
 122 lp_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 */
 129 static INLINE LLVMValueRef
 130 lp_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, (uintptr_t) 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 */