jens
0afb7b1758
git-svn-id: http://moon:8086/svn/vhdl/trunk@1097 cc03376c-175c-47c8-b038-4cd826a8556b
41 lines
2.0 KiB
VHDL
41 lines
2.0 KiB
VHDL
-----------------------------------------------------------------------------
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-- --
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-- Copyright (c) 2003 by Altera Corp. All rights reserved. --
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-- --
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-- --
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-- Description: Declares utility package for internal Altera synthesis --
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-- support. --
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-- --
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-- --
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-- *** USER DESIGNS SHOULD NOT INCLUDE THIS PACKAGE DIRECTLY *** --
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-- --
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------------------------------------------------------------------------------
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PACKAGE altera_internal_syn is
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-- Specfies a built-in pragma function that should replace a user-defined
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-- subprogram during synthesis.
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ATTRIBUTE synthesis_return : STRING;
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-- If a subprogram specifies a synthesis_return attribute, it may also
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-- use these additional attributes to fine-tune the behavior of a built-in
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-- function.
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-- Specifies the method for calculating the size of a unary or binary
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-- built-in pragma function's result. The following values are supported:
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--
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-- LEFT: Use the size of the left operand
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-- RIGHT: Use the size of the right operand
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-- MAX_LEFT_RIGHT: Use the maximum of the left and right operands
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ATTRIBUTE synthesis_result_size : STRING;
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-- Flag that indicates if a type or an argument/result of a built-in pragma
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-- function is signed (TRUE) or unsigned (FALSE).
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ATTRIBUTE is_signed : BOOLEAN;
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-- Flag that indicates if truncation should preserve the sign bit
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attribute signed_truncation : BOOLEAN;
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END altera_internal_syn;
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