<HTML> <HEAD> <TITLE>isfinite</TITLE> <STYLE TYPE="text/css" MEDIA=screen> <!-- BODY { font-family: Arial,Helvetica; } BLOCKQUOTE { margin: 10pt; } H1,A { color: #336699; } /*** Top menu style ****/ .mmenuon { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ff6600; font-size: 10pt; } .mmenuoff { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: 10pt; } .cpyright { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .cpyrightText { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #ffffff; font-size: xx-small; } .sections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 11pt; } .dsections { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 12pt; } .slink { font-family: Arial,Helvetica; font-weight: normal; text-decoration: none; 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color: #333333; font-size: 10pt; } UL > LI > A { font-family: Arial,Helvetica; font-weight: bold; color: #336699; font-size: 10pt; } .moduleInfo { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #333333; font-size: 11pt; } .moduleInfoSec { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 10pt; } .moduleInfoVal { font-family: Arial,Helvetica; font-weight: normal; text-decoration: underline; color: #000000; font-size: 10pt; } .cpanNavTitle { font-family: Arial,Helvetica; font-weight: bold; color: #ffffff; font-size: 10pt; } .cpanNavLetter { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #333333; font-size: 9pt; } .cpanCat { font-family: Arial,Helvetica; font-weight: bold; text-decoration: none; color: #336699; font-size: 9pt; } --> </STYLE> </HEAD> <BODY> <object type="application/x-oleobject" classid="clsid:1e2a7bd0-dab9-11d0-b93a-00c04fc99f9e"> </object> <BLOCKQUOTE> <H1><A NAME="NAME"><A NAME="1">NAME </A></A></H1> <P> <B>isfinite</B> - test whether or not a scalar or each vector component is a finite value </P> <H1><A NAME="SYNOPSIS"><A NAME="2">SYNOPSIS </A></A></H1> <PRE> bool isfinite(float x); bool1 isfinite(float1 x); bool2 isfinite(float2 x); bool3 isfinite(float3 x); bool4 isfinite(float4 x); bool isfinite(half x); bool1 isfinite(half1 x); bool2 isfinite(half2 x); bool3 isfinite(half3 x); bool4 isfinite(half4 x); bool isfinite(fixed x); bool1 isfinite(fixed1 x); bool2 isfinite(fixed2 x); bool3 isfinite(fixed3 x); bool4 isfinite(fixed4 x); </PRE> <H1><A NAME="PARAMETERS"><A NAME="3">PARAMETERS </A></A></H1> <DL> <DT><STRONG>x </STRONG></DT> <DD> <P> Vector or scalar to test for finiteness. </P> </DD></DL> <H1><A NAME="DESCRIPTION"><A NAME="4">DESCRIPTION </A></A></H1> <P> Returns whether or not a scalar or each vector component is a finite value. Infinity and not-a-number (NaN) values are not finite. </P> <H1><A NAME="REFERENCE_IMPLEMENTATION"><A NAME="5">REFERENCE IMPLEMENTATION </A></A></H1> <P> <B>isfinite</B> for <B>float3</B> vectors could be implemented like this. </P> <PRE> bool3 isfinite(float3 s) { // By IEEE 754 rule, 2*Inf equals Inf return (s == s) && ((s == 0) || (s != 2*s)); } </PRE> <H1><A NAME="PROFILE_SUPPORT"><A NAME="6">PROFILE SUPPORT </A></A></H1> <P> <B>isfinite</B> is supported in all profiles except <A HREF="fp20.html">fp20</A>. </P> <H1><A NAME="SEE_ALSO"><A NAME="7">SEE ALSO </A></A></H1> <P> <A HREF="isinf.html"><I>isinf</I></A>, <A HREF="isnan.html"><I>isnan</I></A> </P> </BLOCKQUOTE> </BODY>