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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 (at) 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