<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html> <head> <!-- Generated by HsColour, http://www.cs.york.ac.uk/fp/darcs/hscolour/ --> <title>src/ForSyDe/Shallow/Memory.hs</title> <link type='text/css' rel='stylesheet' href='hscolour.css' /> </head> <body> <pre><a name="line-1"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span> <a name="line-2"></a><span class='hs-comment'>-- |</span> <a name="line-3"></a><span class='hs-comment'>-- Module : ForSyDe.Shallow.Model</span> <a name="line-4"></a><span class='hs-comment'>-- Copyright : (c) SAM Group, KTH/ICT/ECS 2007-2008</span> <a name="line-5"></a><span class='hs-comment'>-- License : BSD-style (see the file LICENSE)</span> <a name="line-6"></a><span class='hs-comment'>-- </span> <a name="line-7"></a><span class='hs-comment'>-- Maintainer : forsyde-dev@ict.kth.se</span> <a name="line-8"></a><span class='hs-comment'>-- Stability : experimental</span> <a name="line-9"></a><span class='hs-comment'>-- Portability : portable</span> <a name="line-10"></a><span class='hs-comment'>--</span> <a name="line-11"></a><span class='hs-comment'>-- This module contains the data structure and access</span> <a name="line-12"></a><span class='hs-comment'>-- functions for the memory model.</span> <a name="line-13"></a><span class='hs-comment'>-----------------------------------------------------------------------------</span> <a name="line-14"></a><span class='hs-keyword'>module</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>Shallow</span><span class='hs-varop'>.</span><span class='hs-conid'>Memory</span> <span class='hs-layout'>(</span> <a name="line-15"></a> <span class='hs-conid'>Memory</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <span class='hs-conid'>Access</span> <span class='hs-layout'>(</span><span class='hs-keyglyph'>..</span><span class='hs-layout'>)</span><span class='hs-layout'>,</span> <a name="line-16"></a> <span class='hs-conid'>MemSize</span><span class='hs-layout'>,</span> <span class='hs-conid'>Adr</span><span class='hs-layout'>,</span> <span class='hs-varid'>newMem</span><span class='hs-layout'>,</span> <span class='hs-varid'>memState</span><span class='hs-layout'>,</span> <span class='hs-varid'>memOutput</span> <a name="line-17"></a> <span class='hs-layout'>)</span> <span class='hs-keyword'>where</span> <a name="line-18"></a> <a name="line-19"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>Shallow</span><span class='hs-varop'>.</span><span class='hs-conid'>Vector</span> <a name="line-20"></a><span class='hs-keyword'>import</span> <span class='hs-conid'>ForSyDe</span><span class='hs-varop'>.</span><span class='hs-conid'>Shallow</span><span class='hs-varop'>.</span><span class='hs-conid'>AbsentExt</span> <a name="line-21"></a> <a name="line-22"></a><a name="Adr"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>Adr</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Int</span> <a name="line-23"></a><a name="MemSize"></a><span class='hs-keyword'>type</span> <span class='hs-conid'>MemSize</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Int</span> <a name="line-24"></a> <a name="line-25"></a><a name="Memory"></a><span class='hs-comment'>-- | The data type 'Memory' is modeled as a vector. </span> <a name="line-26"></a><a name="Memory"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mem</span> <span class='hs-conid'>Adr</span> <span class='hs-layout'>(</span><span class='hs-conid'>Vector</span> <span class='hs-layout'>(</span><span class='hs-conid'>AbstExt</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-27"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span> <a name="line-28"></a> <a name="line-29"></a><a name="Access"></a><span class='hs-comment'>-- | The data type 'Access' defines two access patterns.</span> <a name="line-30"></a><a name="Access"></a><span class='hs-keyword'>data</span> <span class='hs-conid'>Access</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Read</span> <span class='hs-conid'>Adr</span> <span class='hs-comment'>-- ^ 'Read adr' reads an address from the memory.</span> <a name="line-31"></a> <span class='hs-keyglyph'>|</span> <span class='hs-conid'>Write</span> <span class='hs-conid'>Adr</span> <span class='hs-varid'>a</span> <span class='hs-comment'>-- ^ 'Write Adr a' writes a value into an address.</span> <a name="line-32"></a> <span class='hs-keyword'>deriving</span> <span class='hs-layout'>(</span><span class='hs-conid'>Eq</span><span class='hs-layout'>,</span> <span class='hs-conid'>Show</span><span class='hs-layout'>)</span> <a name="line-33"></a> <a name="line-34"></a><a name="newMem"></a><span class='hs-comment'>-- | The function 'newMem' creates a new memory, where the number of entries is given by a parameter.</span> <a name="line-35"></a><span class='hs-definition'>newMem</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>MemSize</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <a name="line-36"></a> <a name="line-37"></a><a name="memState"></a><span class='hs-comment'>-- | The function 'memState' gives the new state of the memory, after an access to a memory. A 'Read' operation leaves the memory unchanged.</span> <a name="line-38"></a><span class='hs-definition'>memState</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Access</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <a name="line-39"></a> <a name="line-40"></a> <a name="line-41"></a><a name="memOutput"></a><span class='hs-comment'>-- | The function 'memOutput' gives the output of the memory after an access to the memory. A 'Write' operation gives an absent value as output.</span> <a name="line-42"></a><span class='hs-definition'>memOutput</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Access</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>AbstExt</span> <span class='hs-varid'>a</span> <a name="line-43"></a> <a name="line-44"></a><span class='hs-comment'>-- Implementation</span> <a name="line-45"></a> <a name="line-46"></a><span class='hs-definition'>newMem</span> <span class='hs-varid'>size</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mem</span> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-varid'>copyV</span> <span class='hs-varid'>size</span> <span class='hs-conid'>Abst</span><span class='hs-layout'>)</span> <a name="line-47"></a> <a name="line-48"></a><a name="writeMem"></a><span class='hs-definition'>writeMem</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>Int</span><span class='hs-layout'>,</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <a name="line-49"></a><span class='hs-definition'>writeMem</span> <span class='hs-layout'>(</span><span class='hs-conid'>Mem</span> <span class='hs-varid'>size</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <a name="line-50"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-varid'>size</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mem</span> <span class='hs-varid'>size</span> <span class='hs-layout'>(</span><span class='hs-varid'>replaceV</span> <span class='hs-varid'>vs</span> <span class='hs-varid'>i</span> <span class='hs-layout'>(</span><span class='hs-varid'>abstExt</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span><span class='hs-layout'>)</span> <a name="line-51"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Mem</span> <span class='hs-varid'>size</span> <span class='hs-varid'>vs</span> <a name="line-52"></a> <a name="line-53"></a><a name="readMem"></a><span class='hs-definition'>readMem</span> <span class='hs-keyglyph'>::</span> <span class='hs-conid'>Memory</span> <span class='hs-varid'>a</span> <span class='hs-keyglyph'>-></span> <span class='hs-conid'>Int</span> <span class='hs-keyglyph'>-></span> <span class='hs-layout'>(</span><span class='hs-conid'>AbstExt</span> <span class='hs-varid'>a</span><span class='hs-layout'>)</span> <a name="line-54"></a><span class='hs-definition'>readMem</span> <span class='hs-layout'>(</span><span class='hs-conid'>Mem</span> <span class='hs-varid'>size</span> <span class='hs-varid'>vs</span><span class='hs-layout'>)</span> <span class='hs-varid'>i</span> <a name="line-55"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>i</span> <span class='hs-varop'><</span> <span class='hs-varid'>size</span> <span class='hs-varop'>&&</span> <span class='hs-varid'>i</span> <span class='hs-varop'>>=</span> <span class='hs-num'>0</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>vs</span> <span class='hs-varop'>`atV`</span> <span class='hs-varid'>i</span> <a name="line-56"></a> <span class='hs-keyglyph'>|</span> <span class='hs-varid'>otherwise</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Abst</span> <a name="line-57"></a> <a name="line-58"></a><span class='hs-definition'>memState</span> <span class='hs-varid'>mem</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>mem</span> <a name="line-59"></a><span class='hs-definition'>memState</span> <span class='hs-varid'>mem</span> <span class='hs-layout'>(</span><span class='hs-conid'>Write</span> <span class='hs-varid'>i</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>writeMem</span> <span class='hs-varid'>mem</span> <span class='hs-layout'>(</span><span class='hs-varid'>i</span><span class='hs-layout'>,</span> <span class='hs-varid'>x</span><span class='hs-layout'>)</span> <a name="line-60"></a> <a name="line-61"></a><span class='hs-definition'>memOutput</span> <span class='hs-varid'>mem</span> <span class='hs-layout'>(</span><span class='hs-conid'>Read</span> <span class='hs-varid'>i</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-varid'>readMem</span> <span class='hs-varid'>mem</span> <span class='hs-varid'>i</span> <a name="line-62"></a><span class='hs-definition'>memOutput</span> <span class='hs-keyword'>_</span> <span class='hs-layout'>(</span><span class='hs-conid'>Write</span> <span class='hs-keyword'>_</span> <span class='hs-keyword'>_</span><span class='hs-layout'>)</span> <span class='hs-keyglyph'>=</span> <span class='hs-conid'>Abst</span> <a name="line-63"></a> <a name="line-64"></a> </pre></body> </html>
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