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<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:variable name="total" select="count(//reg)"/>
<xsl:template name="reg">
<xsl:param name="which" select="1"/>
<xsl:param name="nextnum" select="0"/>
<xsl:variable name="thisnum" select="@regnum"/>
<xsl:element name="reg">
<xsl:attribute name="name"><xsl:value-of select="@name"/></xsl:attribute>
<xsl:attribute name="bitsize"><xsl:value-of select="@bitsize"/></xsl:attribute>
<xsl:choose>
<xsl:when test="not(@regnum)">
<xsl:attribute name="regnum"><xsl:value-of select="$nextnum"/></xsl:attribute>
</xsl:when>
<xsl:otherwise>
<xsl:attribute name="regnum"><xsl:value-of select="@regnum"/></xsl:attribute>
</xsl:otherwise>
</xsl:choose>
</xsl:element>
<xsl:if test="$which < $total">
<xsl:for-each select="/descendant::reg[$which + 1]">
<xsl:choose>
<xsl:when test="not($thisnum)">
<xsl:call-template name="reg">
<xsl:with-param name="which" select="$which + 1"/>
<xsl:with-param name="nextnum" select="$nextnum + 1"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="reg">
<xsl:with-param name="which" select="$which + 1"/>
<xsl:with-param name="nextnum" select="$thisnum + 1"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
</xsl:if>
</xsl:template>
<xsl:template match="/">
<target>
<xsl:for-each select="/descendant::reg[1]">
<xsl:call-template name="reg"/>
</xsl:for-each>
</target>
</xsl:template>
</xsl:stylesheet>
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