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1 ------------------------------------------------------------------------------
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2 -- --
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3 -- GNAT COMPILER COMPONENTS --
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4 -- --
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5 -- E X P _ F I X D --
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6 -- --
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7 -- S p e c --
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8 -- --
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131
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9 -- Copyright (C) 1992-2018, Free Software Foundation, Inc. --
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111
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10 -- --
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11 -- GNAT is free software; you can redistribute it and/or modify it under --
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12 -- terms of the GNU General Public License as published by the Free Soft- --
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13 -- ware Foundation; either version 3, or (at your option) any later ver- --
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14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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17 -- for more details. You should have received a copy of the GNU General --
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18 -- Public License distributed with GNAT; see file COPYING3. If not, go to --
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19 -- http://www.gnu.org/licenses for a complete copy of the license. --
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20 -- --
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21 -- GNAT was originally developed by the GNAT team at New York University. --
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22 -- Extensive contributions were provided by Ada Core Technologies Inc. --
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23 -- --
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24 ------------------------------------------------------------------------------
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25
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26 -- Expand routines for fixed-point convert, divide and multiply operations
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27
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28 with Types; use Types;
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29
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30 package Exp_Fixd is
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31
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32 -- General note on universal fixed. In the routines below, a fixed-point
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33 -- type is always a specific fixed-point type or universal real, never
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34 -- universal fixed. Universal fixed only appears as the result type of a
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35 -- division or multiplication and in all such cases, the parent node, which
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36 -- must be either a conversion node or a 'Round attribute reference node,
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37 -- has the specific type information. In both cases, the parent node is
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38 -- removed from the tree, and the appropriate routine in this package is
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39 -- called with a multiply or divide node with all types (and also possibly
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40 -- the Rounded_Result flag) set.
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41
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42 ----------------------------
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43 -- Fixed-Point Conversion --
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44 ----------------------------
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45
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46 procedure Expand_Convert_Fixed_To_Fixed (N : Node_Id);
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47 -- This routine expands the conversion of one fixed-point type to another,
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48 -- N is the N_Op_Conversion node with the result and expression types (and
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49 -- possibly the Rounded_Result flag) set.
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50
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51 procedure Expand_Convert_Fixed_To_Float (N : Node_Id);
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52 -- This routine expands the conversion from a fixed-point type to a
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53 -- floating-point type. N is an N_Type_Conversion node with the result
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54 -- and expression types set.
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55
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56 procedure Expand_Convert_Fixed_To_Integer (N : Node_Id);
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57 -- This routine expands the conversion from a fixed-point type to an
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58 -- integer type. N is an N_Type_Conversion node with the result and
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59 -- operand types set.
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60
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61 procedure Expand_Convert_Float_To_Fixed (N : Node_Id);
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62 -- This routine expands the conversion from a floating-point type to
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63 -- a fixed-point type. N is an N_Type_Conversion node with the result
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64 -- and operand types (and possibly the Rounded_Result flag) set.
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65
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66 procedure Expand_Convert_Integer_To_Fixed (N : Node_Id);
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67 -- This routine expands the conversion from an integer type to a
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68 -- fixed-point type. N is an N_Type_Conversion node with the result
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69 -- and operand types (and possibly the Rounded_Result flag) set.
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70
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71 --------------------------
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72 -- Fixed-Point Division --
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73 --------------------------
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74
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75 procedure Expand_Decimal_Divide_Call (N : Node_Id);
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76 -- This routine expands a call to the procedure Decimal.Divide. The
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77 -- argument N is the N_Function_Call node.
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78
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79 procedure Expand_Divide_Fixed_By_Fixed_Giving_Fixed (N : Node_Id);
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80 -- This routine expands the division between fixed-point types, with
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81 -- a fixed-point type result. N is an N_Op_Divide node with operand
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82 -- and result types (and possibly the Rounded_Result flag) set. Either
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83 -- (but not both) of the operands may be universal real.
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84
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85 procedure Expand_Divide_Fixed_By_Fixed_Giving_Float (N : Node_Id);
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86 -- This routine expands the division between two fixed-point types with
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87 -- a floating-point result. N is an N_Op_Divide node with the result
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88 -- and operand types set. Either (but not both) of the operands may be
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89 -- universal real.
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90
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91 procedure Expand_Divide_Fixed_By_Fixed_Giving_Integer (N : Node_Id);
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92 -- This routine expands the division between two fixed-point types with
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93 -- an integer type result. N is an N_Op_Divide node with the result and
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94 -- operand types set. Either (but not both) of the operands may be
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95 -- universal real.
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96
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97 procedure Expand_Divide_Fixed_By_Integer_Giving_Fixed (N : Node_Id);
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98 -- This routine expands the division between a fixed-point type and
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99 -- standard integer type. The result type is the same fixed-point type
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100 -- as the operand type. N is an N_Op_Divide node with the result and
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101 -- left operand types being the fixed-point type, and the right operand
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102 -- type being standard integer (and possibly Rounded_Result set).
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103
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104 --------------------------------
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105 -- Fixed-Point Multiplication --
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106 --------------------------------
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107
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108 procedure Expand_Multiply_Fixed_By_Fixed_Giving_Fixed (N : Node_Id);
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109 -- This routine expands the multiplication between fixed-point types
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110 -- with a fixed-point type result. N is an N_Op_Multiply node with the
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111 -- result and operand types set. Either (but not both) of the operands
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112 -- may be universal real.
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113
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114 procedure Expand_Multiply_Fixed_By_Fixed_Giving_Float (N : Node_Id);
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115 -- This routine expands the multiplication between two fixed-point types
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116 -- with a floating-point result. N is an N_Op_Multiply node with the
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117 -- result and operand types set. Either (but not both) of the operands
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118 -- may be universal real.
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119
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120 procedure Expand_Multiply_Fixed_By_Fixed_Giving_Integer (N : Node_Id);
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121 -- This routine expands the multiplication between two fixed-point types
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122 -- with an integer result. N is an N_Op_Multiply node with the result
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123 -- and operand types set. Either (but not both) of the operands may be
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124 -- be universal real.
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125
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126 procedure Expand_Multiply_Fixed_By_Integer_Giving_Fixed (N : Node_Id);
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127 -- This routine expands the multiplication between a fixed-point type and
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128 -- a standard integer type. The result type is the same fixed-point type
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129 -- as the fixed operand type. N is an N_Op_Multiply node whose result type
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130 -- and left operand types are the fixed-point type, and whose right operand
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131 -- type is always standard integer.
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132
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133 procedure Expand_Multiply_Integer_By_Fixed_Giving_Fixed (N : Node_Id);
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134 -- This routine expands the multiplication between standard integer and a
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135 -- fixed-point type. The result type is the same fixed-point type as the
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136 -- fixed operand type. N is an N_Op_Multiply node whose result type
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137 -- and right operand types are the fixed-point type, and whose left operand
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138 -- type is always standard integer.
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139
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140 end Exp_Fixd;
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