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   6 <TITLE>The SUIF Version 1 Library - Load Constant Instructions</TITLE>
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  17 <H2><A NAME="SEC34" HREF="suif1_toc.html#TOC34">Load Constant Instructions</A></H2>
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  27 Rather than allowing constant values to be used directly as operands,
  28 SUIF uses separate <CODE>ldc</CODE> instructions to load constant values.  The
  29 <CODE>in_ldc</CODE> class holds these instructions.  Instead of the usual
  30 source operands, this class has an immediate value field
  31 (see section <A HREF="suif1_100.html#SEC100">Immediate Values</A>).  The <CODE>value</CODE> and <CODE>set_value</CODE> methods may be
  32 used to access this field.
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  36 Only certain kinds of immediate values are supported in an <CODE>ldc</CODE>
  37 instruction:
  38
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  40 <DL COMPACT>
  41
  42 <DT>Symbolic addresses (See section <A HREF="suif1_101.html#SEC101">Symbolic Addresses</A>)
  43 <DD>
  44 The result type of the instruction must be a pointer type.
  45
  46 <DT>Integers
  47 <DD>
  48 The result type must be an integer or pointer type.  Pointer types are
  49 allowed so that the null pointer can be loaded as the integer value
  50 zero.
  51
  52 <DT>Floating-point values
  53 <DD>
  54 The result type must be a floating-point type.
  55 </DL>
  56
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  58 Other kinds of immediate values may be stored in the <CODE>value</CODE> field
  59 of an <CODE>ldc</CODE> instruction, but most SUIF passes and certain library
  60 functions will not be able to handle them.
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