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141 lines
7.5 KiB
Ada
141 lines
7.5 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT COMPILER COMPONENTS --
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-- --
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-- E X P _ F I X D --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 1992-2022, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
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-- for more details. You should have received a copy of the GNU General --
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-- Public License distributed with GNAT; see file COPYING3. If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- Expand routines for fixed-point convert, divide and multiply operations
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with Types; use Types;
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package Exp_Fixd is
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-- General note on universal fixed. In the routines below, a fixed-point
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-- type is always a specific fixed-point type or universal real, never
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-- universal fixed. Universal fixed only appears as the result type of a
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-- division or multiplication and in all such cases, the parent node, which
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-- must be either a conversion node or a 'Round attribute reference node,
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-- has the specific type information. In both cases, the parent node is
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-- removed from the tree, and the appropriate routine in this package is
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-- called with a multiply or divide node with all types (and also possibly
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-- the Rounded_Result flag) set.
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----------------------------
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-- Fixed-Point Conversion --
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----------------------------
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procedure Expand_Convert_Fixed_To_Fixed (N : Node_Id);
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-- This routine expands the conversion of one fixed-point type to another,
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-- N is the N_Op_Conversion node with the result and expression types (and
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-- possibly the Rounded_Result flag) set.
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procedure Expand_Convert_Fixed_To_Float (N : Node_Id);
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-- This routine expands the conversion from a fixed-point type to a
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-- floating-point type. N is an N_Type_Conversion node with the result
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-- and expression types set.
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procedure Expand_Convert_Fixed_To_Integer (N : Node_Id);
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-- This routine expands the conversion from a fixed-point type to an
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-- integer type. N is an N_Type_Conversion node with the result and
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-- operand types set.
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procedure Expand_Convert_Float_To_Fixed (N : Node_Id);
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-- This routine expands the conversion from a floating-point type to
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-- a fixed-point type. N is an N_Type_Conversion node with the result
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-- and operand types (and possibly the Rounded_Result flag) set.
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procedure Expand_Convert_Integer_To_Fixed (N : Node_Id);
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-- This routine expands the conversion from an integer type to a
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-- fixed-point type. N is an N_Type_Conversion node with the result
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-- and operand types (and possibly the Rounded_Result flag) set.
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--------------------------
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-- Fixed-Point Division --
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--------------------------
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procedure Expand_Decimal_Divide_Call (N : Node_Id);
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-- This routine expands a call to the procedure Decimal.Divide. The
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-- argument N is the N_Function_Call node.
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procedure Expand_Divide_Fixed_By_Fixed_Giving_Fixed (N : Node_Id);
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-- This routine expands the division between fixed-point types, with
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-- a fixed-point type result. N is an N_Op_Divide node with operand
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-- and result types (and possibly the Rounded_Result flag) set. Either
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-- (but not both) of the operands may be universal real.
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procedure Expand_Divide_Fixed_By_Fixed_Giving_Float (N : Node_Id);
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-- This routine expands the division between two fixed-point types with
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-- a floating-point result. N is an N_Op_Divide node with the result
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-- and operand types set. Either (but not both) of the operands may be
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-- universal real.
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procedure Expand_Divide_Fixed_By_Fixed_Giving_Integer (N : Node_Id);
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-- This routine expands the division between two fixed-point types with
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-- an integer type result. N is an N_Op_Divide node with the result and
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-- operand types set. Either (but not both) of the operands may be
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-- universal real.
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procedure Expand_Divide_Fixed_By_Integer_Giving_Fixed (N : Node_Id);
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-- This routine expands the division between a fixed-point type and
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-- standard integer type. The result type is the same fixed-point type
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-- as the operand type. N is an N_Op_Divide node with the result and
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-- left operand types being the fixed-point type, and the right operand
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-- type being standard integer (and possibly Rounded_Result set).
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--------------------------------
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-- Fixed-Point Multiplication --
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--------------------------------
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procedure Expand_Multiply_Fixed_By_Fixed_Giving_Fixed (N : Node_Id);
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-- This routine expands the multiplication between fixed-point types
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-- with a fixed-point type result. N is an N_Op_Multiply node with the
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-- result and operand types set. Either (but not both) of the operands
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-- may be universal real.
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procedure Expand_Multiply_Fixed_By_Fixed_Giving_Float (N : Node_Id);
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-- This routine expands the multiplication between two fixed-point types
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-- with a floating-point result. N is an N_Op_Multiply node with the
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-- result and operand types set. Either (but not both) of the operands
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-- may be universal real.
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procedure Expand_Multiply_Fixed_By_Fixed_Giving_Integer (N : Node_Id);
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-- This routine expands the multiplication between two fixed-point types
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-- with an integer result. N is an N_Op_Multiply node with the result
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-- and operand types set. Either (but not both) of the operands may be
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-- be universal real.
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procedure Expand_Multiply_Fixed_By_Integer_Giving_Fixed (N : Node_Id);
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-- This routine expands the multiplication between a fixed-point type and
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-- a standard integer type. The result type is the same fixed-point type
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-- as the fixed operand type. N is an N_Op_Multiply node whose result type
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-- and left operand types are the fixed-point type, and whose right operand
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-- type is always standard integer.
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procedure Expand_Multiply_Integer_By_Fixed_Giving_Fixed (N : Node_Id);
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-- This routine expands the multiplication between standard integer and a
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-- fixed-point type. The result type is the same fixed-point type as the
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-- fixed operand type. N is an N_Op_Multiply node whose result type
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-- and right operand types are the fixed-point type, and whose left operand
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-- type is always standard integer.
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end Exp_Fixd;
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