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ir.texi: Document complex number representation. 

2000-04-22  Gabriel Dos Reis <gdr@codesourcery.com>

        * ir.texi:  Document complex number representation.

From-SVN: r33338
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Gabriel Dos Reis 2000-04-22 12:01:30 +00:00 committed by Gabriel Dos Reis
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gcc/cp/ChangeLog
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@ -1,3 +1,7 @@
2000-04-22 Gabriel Dos Reis <gdr@codesourcery.com>
* ir.texi: Document complex number representation.
2000-04-20 Nathan Sidwell <nathan@codesourcery.com>
* rtti.c (init_rtti_processing): Set tinfo_var_id in new-abi.

27
gcc/cp/ir.texi
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@ -442,7 +442,8 @@ double} types. The number of bits in the floating-point representation
is given by @code{TYPE_PRECISION}, as in the @code{INTEGER_TYPE} case.
@item COMPLEX_TYPE
FIXME: The __complex__ extension is supported in G++. Document.
Used to represent GCC builtin @code{__complex__} data types. The
@code{TREE_TYPE} is the type of the real and imaginary parts.
@item ENUMERAL_TYPE
Used to represent an enumeration type. The @code{TYPE_PRECISION} gives
@ -1459,6 +1460,7 @@ The @code{WHILE_BODY} is the body of the loop.
@findex tree_int_cst_lt
@findex tree_int_cst_equal
@tindex REAL_CST
@tindex COMPLEX_CST
@tindex STRING_CST
@findex TREE_STRING_LENGTH
@findex TREE_STRING_POINTER
@ -1473,6 +1475,10 @@ The @code{WHILE_BODY} is the body of the loop.
@tindex INDIRECT_REF
@tindex FIX_TRUNC_EXPR
@tindex FLOAT_EXPR
@tindex COMPLEX_EXPR
@tindex CONJ_EXPR
@tindex REALPART_EXPR
@tindex IMAGPART_EXPR
@tindex NOP_EXPR
@tindex CONVERT_EXPR
@tindex THROW_EXPR
@ -1591,6 +1597,12 @@ its bit-pattern.
FIXME: Talk about how to obtain representations of this constant, do
comparisons, and so forth.
@item COMPLEX_CST
These nodes are used to represent complex number constants, that is a
@code{__complex__} whose parts are constant nodes. The
@code{TREE_REALPART} and @code@TREE_IMAGPART} return the real and the
imaginary parts respectively.
@item STRING_CST
These nodes represent string-constants. The @code{TREE_STRING_LENGTH}
returns the length of the string, as an @code{int}. The
@ -1682,6 +1694,19 @@ the complete expression will have a floating-point type.
FIXME: How is the operand supposed to be rounded? Is this dependent on
-mieee?
@item COMPLEX_EXPR
These nodes are used to represent complex numbers constructed from two
expressions of the same (integer or real) type. The first operand is the
real part and the second operand is the imaginary part.
@item CONJ_EXPR
These nodes represent the conjugate of their operand.
@item REALPART_EXPR
@item IMAGPART_EXPR
These nodes represent respectively the real and the imaginary parts
of complex numbers (their sole argument).
@item NON_LVALUE_EXPR
These nodes indicate that their one and only operand is not an lvalue.
A back-end can treat these identically to the single operand.