1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- E X P _ F I X D -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2008, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26-- Expand routines for fixed-point convert, divide and multiply operations 27 28with Types; use Types; 29 30package Exp_Fixd is 31 32 -- General note on universal fixed. In the routines below, a fixed-point 33 -- type is always a specific fixed-point type or universal real, never 34 -- universal fixed. Universal fixed only appears as the result type of a 35 -- division or multiplication and in all such cases, the parent node, which 36 -- must be either a conversion node or a 'Round attribute reference node, 37 -- has the specific type information. In both cases, the parent node is 38 -- removed from the tree, and the appropriate routine in this package is 39 -- called with a multiply or divide node with all types (and also possibly 40 -- the Rounded_Result flag) set. 41 42 ---------------------------- 43 -- Fixed-Point Conversion -- 44 ---------------------------- 45 46 procedure Expand_Convert_Fixed_To_Fixed (N : Node_Id); 47 -- This routine expands the conversion of one fixed-point type to another, 48 -- N is the N_Op_Conversion node with the result and expression types (and 49 -- possibly the Rounded_Result flag) set. 50 51 procedure Expand_Convert_Fixed_To_Float (N : Node_Id); 52 -- This routine expands the conversion from a fixed-point type to a 53 -- floating-point type. N is an N_Type_Conversion node with the result 54 -- and expression types set. 55 56 procedure Expand_Convert_Fixed_To_Integer (N : Node_Id); 57 -- This routine expands the conversion from a fixed-point type to an 58 -- integer type. N is an N_Type_Conversion node with the result and 59 -- operand types set. 60 61 procedure Expand_Convert_Float_To_Fixed (N : Node_Id); 62 -- This routine expands the conversion from a floating-point type to 63 -- a fixed-point type. N is an N_Type_Conversion node with the result 64 -- and operand types (and possibly the Rounded_Result flag) set. 65 66 procedure Expand_Convert_Integer_To_Fixed (N : Node_Id); 67 -- This routine expands the conversion from an integer type to a 68 -- fixed-point type. N is an N_Type_Conversion node with the result 69 -- and operand types (and possibly the Rounded_Result flag) set. 70 71 -------------------------- 72 -- Fixed-Point Division -- 73 -------------------------- 74 75 procedure Expand_Decimal_Divide_Call (N : Node_Id); 76 -- This routine expands a call to the procedure Decimal.Divide. The 77 -- argument N is the N_Function_Call node. 78 79 procedure Expand_Divide_Fixed_By_Fixed_Giving_Fixed (N : Node_Id); 80 -- This routine expands the division between fixed-point types, with 81 -- a fixed-point type result. N is an N_Op_Divide node with operand 82 -- and result types (and possibly the Rounded_Result flag) set. Either 83 -- (but not both) of the operands may be universal real. 84 85 procedure Expand_Divide_Fixed_By_Fixed_Giving_Float (N : Node_Id); 86 -- This routine expands the division between two fixed-point types with 87 -- a floating-point result. N is an N_Op_Divide node with the result 88 -- and operand types set. Either (but not both) of the operands may be 89 -- universal real. 90 91 procedure Expand_Divide_Fixed_By_Fixed_Giving_Integer (N : Node_Id); 92 -- This routine expands the division between two fixed-point types with 93 -- an integer type result. N is an N_Op_Divide node with the result and 94 -- operand types set. Either (but not both) of the operands may be 95 -- universal real. 96 97 procedure Expand_Divide_Fixed_By_Integer_Giving_Fixed (N : Node_Id); 98 -- This routine expands the division between a fixed-point type and 99 -- standard integer type. The result type is the same fixed-point type 100 -- as the operand type. N is an N_Op_Divide node with the result and 101 -- left operand types being the fixed-point type, and the right operand 102 -- type being standard integer (and possibly Rounded_Result set). 103 104 -------------------------------- 105 -- Fixed-Point Multiplication -- 106 -------------------------------- 107 108 procedure Expand_Multiply_Fixed_By_Fixed_Giving_Fixed (N : Node_Id); 109 -- This routine expands the multiplication between fixed-point types 110 -- with a fixed-point type result. N is an N_Op_Multiply node with the 111 -- result and operand types set. Either (but not both) of the operands 112 -- may be universal real. 113 114 procedure Expand_Multiply_Fixed_By_Fixed_Giving_Float (N : Node_Id); 115 -- This routine expands the multiplication between two fixed-point types 116 -- with a floating-point result. N is an N_Op_Multiply node with the 117 -- result and operand types set. Either (but not both) of the operands 118 -- may be universal real. 119 120 procedure Expand_Multiply_Fixed_By_Fixed_Giving_Integer (N : Node_Id); 121 -- This routine expands the multiplication between two fixed-point types 122 -- with an integer result. N is an N_Op_Multiply node with the result 123 -- and operand types set. Either (but not both) of the operands may be 124 -- be universal real. 125 126 procedure Expand_Multiply_Fixed_By_Integer_Giving_Fixed (N : Node_Id); 127 -- This routine expands the multiplication between a fixed-point type and 128 -- a standard integer type. The result type is the same fixed-point type 129 -- as the fixed operand type. N is an N_Op_Multiply node whose result type 130 -- and left operand types are the fixed-point type, and whose right operand 131 -- type is always standard integer. 132 133 procedure Expand_Multiply_Integer_By_Fixed_Giving_Fixed (N : Node_Id); 134 -- This routine expands the multiplication between standard integer and a 135 -- fixed-point type. The result type is the same fixed-point type as the 136 -- fixed operand type. N is an N_Op_Multiply node whose result type 137 -- and right operand types are the fixed-point type, and whose left operand 138 -- type is always standard integer. 139 140end Exp_Fixd; 141