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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
  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
  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
  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.