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rtl.texi (const_double): Remove the "addr" operand.

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	* doc/rtl.texi (const_double): Remove the "addr" operand.
	Describe CONST_DOUBLE_* macros under const_double rather
	than const_vector.
	(const_fixed): Fix the operand description.
	(const): Add an @findex directive.
	(CONST0_RTX, CONST1_RTX, CONST2_RTX): Move description
	after the constant rtl table.
	(fix): Combine floating-point and fixed-point descriptions.
	Fix hyphenation.
	* sched-deps.c (sched_analyze_2): Remove reference to
	CONST_DOUBLE_CHAIN.

From-SVN: r141149
This commit is contained in:
Richard Sandiford 2008-10-15 18:33:23 +00:00 committed by Richard Sandiford
parent d4e2d7d2d6
commit bf52069846
3 changed files with 58 additions and 60 deletions
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14
gcc/ChangeLog
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@ -1,3 +1,17 @@
2008-10-15 Richard Sandiford <rdsandiford@googlemail.com>
* doc/rtl.texi (const_double): Remove the "addr" operand.
Describe CONST_DOUBLE_* macros under const_double rather
than const_vector.
(const_fixed): Fix the operand description.
(const): Add an @findex directive.
(CONST0_RTX, CONST1_RTX, CONST2_RTX): Move description
after the constant rtl table.
(fix): Combine floating-point and fixed-point descriptions.
Fix hyphenation.
* sched-deps.c (sched_analyze_2): Remove reference to
CONST_DOUBLE_CHAIN.
2008-10-15 Richard Sandiford <rdsandiford@googlemail.com>
* config/mn10300/mn10300.h (OUTPUT_ADDR_CONST_EXTRA): Handle

99
gcc/doc/rtl.texi
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@ -1507,47 +1507,13 @@ Similarly, there is only one object for the integer whose value is
@code{constm1_rtx} will point to the same object.
@findex const_double
@item (const_double:@var{m} @var{addr} @var{i0} @var{i1} @dots{})
@item (const_double:@var{m} @var{i0} @var{i1} @dots{})
Represents either a floating-point constant of mode @var{m} or an
integer constant too large to fit into @code{HOST_BITS_PER_WIDE_INT}
bits but small enough to fit within twice that number of bits (GCC
does not provide a mechanism to represent even larger constants). In
the latter case, @var{m} will be @code{VOIDmode}.
@findex const_fixed
@item (const_fixed:@var{m} @var{addr})
Represents a fixed-point constant of mode @var{m}.
The data structure, which contains data with the size of two
@code{HOST_BITS_PER_WIDE_INT} and the associated fixed-point mode,
is access with the macro @code{CONST_FIXED_VALUE}. The high part of data
is accessed with @code{CONST_FIXED_VALUE_HIGH}; the low part is accessed
with @code{CONST_FIXED_VALUE_LOW}.
@findex const_vector
@item (const_vector:@var{m} [@var{x0} @var{x1} @dots{}])
Represents a vector constant. The square brackets stand for the vector
containing the constant elements. @var{x0}, @var{x1} and so on are
the @code{const_int}, @code{const_double} or @code{const_fixed} elements.
The number of units in a @code{const_vector} is obtained with the macro
@code{CONST_VECTOR_NUNITS} as in @code{CONST_VECTOR_NUNITS (@var{v})}.
Individual elements in a vector constant are accessed with the macro
@code{CONST_VECTOR_ELT} as in @code{CONST_VECTOR_ELT (@var{v}, @var{n})}
where @var{v} is the vector constant and @var{n} is the element
desired.
@findex CONST_DOUBLE_MEM
@findex CONST_DOUBLE_CHAIN
@var{addr} is used to contain the @code{mem} expression that corresponds
to the location in memory that at which the constant can be found. If
it has not been allocated a memory location, but is on the chain of all
@code{const_double} expressions in this compilation (maintained using an
undisplayed field), @var{addr} contains @code{const0_rtx}. If it is not
on the chain, @var{addr} contains @code{cc0_rtx}. @var{addr} is
customarily accessed with the macro @code{CONST_DOUBLE_MEM} and the
chain field via @code{CONST_DOUBLE_CHAIN}.
@findex CONST_DOUBLE_LOW
If @var{m} is @code{VOIDmode}, the bits of the value are stored in
@var{i0} and @var{i1}. @var{i0} is customarily accessed with the macro
@ -1561,19 +1527,27 @@ machine's or host machine's floating point format. To convert them to
the precise bit pattern used by the target machine, use the macro
@code{REAL_VALUE_TO_TARGET_DOUBLE} and friends (@pxref{Data Output}).
@findex CONST0_RTX
@findex CONST1_RTX
@findex CONST2_RTX
The macro @code{CONST0_RTX (@var{mode})} refers to an expression with
value 0 in mode @var{mode}. If mode @var{mode} is of mode class
@code{MODE_INT}, it returns @code{const0_rtx}. If mode @var{mode} is of
mode class @code{MODE_FLOAT}, it returns a @code{CONST_DOUBLE}
expression in mode @var{mode}. Otherwise, it returns a
@code{CONST_VECTOR} expression in mode @var{mode}. Similarly, the macro
@code{CONST1_RTX (@var{mode})} refers to an expression with value 1 in
mode @var{mode} and similarly for @code{CONST2_RTX}. The
@code{CONST1_RTX} and @code{CONST2_RTX} macros are undefined
for vector modes.
@findex const_fixed
@item (const_fixed:@var{m} @dots{})
Represents a fixed-point constant of mode @var{m}.
The operand is a data structure of type @code{struct fixed_value} and
is accessed with the macro @code{CONST_FIXED_VALUE}. The high part of
data is accessed with @code{CONST_FIXED_VALUE_HIGH}; the low part is
accessed with @code{CONST_FIXED_VALUE_LOW}.
@findex const_vector
@item (const_vector:@var{m} [@var{x0} @var{x1} @dots{}])
Represents a vector constant. The square brackets stand for the vector
containing the constant elements. @var{x0}, @var{x1} and so on are
the @code{const_int}, @code{const_double} or @code{const_fixed} elements.
The number of units in a @code{const_vector} is obtained with the macro
@code{CONST_VECTOR_NUNITS} as in @code{CONST_VECTOR_NUNITS (@var{v})}.
Individual elements in a vector constant are accessed with the macro
@code{CONST_VECTOR_ELT} as in @code{CONST_VECTOR_ELT (@var{v}, @var{n})}
where @var{v} is the vector constant and @var{n} is the element
desired.
@findex const_string
@item (const_string @var{str})
@ -1605,6 +1579,7 @@ references is so that jump optimization can distinguish them.
The @code{label_ref} contains a mode, which is usually @code{Pmode}.
Usually that is the only mode for which a label is directly valid.
@findex const
@item (const:@var{m} @var{exp})
Represents a constant that is the result of an assembly-time
arithmetic computation. The operand, @var{exp}, is an expression that
@ -1627,6 +1602,20 @@ reference a global memory location.
@var{m} should be @code{Pmode}.
@end table
@findex CONST0_RTX
@findex CONST1_RTX
@findex CONST2_RTX
The macro @code{CONST0_RTX (@var{mode})} refers to an expression with
value 0 in mode @var{mode}. If mode @var{mode} is of mode class
@code{MODE_INT}, it returns @code{const0_rtx}. If mode @var{mode} is of
mode class @code{MODE_FLOAT}, it returns a @code{CONST_DOUBLE}
expression in mode @var{mode}. Otherwise, it returns a
@code{CONST_VECTOR} expression in mode @var{mode}. Similarly, the macro
@code{CONST1_RTX (@var{mode})} refers to an expression with value 1 in
mode @var{mode} and similarly for @code{CONST2_RTX}. The
@code{CONST1_RTX} and @code{CONST2_RTX} macros are undefined
for vector modes.
@node Regs and Memory
@section Registers and Memory
@cindex RTL register expressions
@ -2707,7 +2696,12 @@ regarded as unsigned, to floating point mode @var{m}.
@findex fix
@item (fix:@var{m} @var{x})
When @var{m} is a fixed point mode, represents the result of
When @var{m} is a floating-point mode, represents the result of
converting floating point value @var{x} (valid for mode @var{m}) to an
integer, still represented in floating point mode @var{m}, by rounding
towards zero.
When @var{m} is a fixed-point mode, represents the result of
converting floating point value @var{x} to mode @var{m}, regarded as
signed. How rounding is done is not specified, so this operation may
be used validly in compiling C code only for integer-valued operands.
@ -2718,13 +2712,6 @@ Represents the result of converting floating point value @var{x} to
fixed point mode @var{m}, regarded as unsigned. How rounding is done
is not specified.
@findex fix
@item (fix:@var{m} @var{x})
When @var{m} is a floating point mode, represents the result of
converting floating point value @var{x} (valid for mode @var{m}) to an
integer, still represented in floating point mode @var{m}, by rounding
towards zero.
@findex fract_convert
@item (fract_convert:@var{m} @var{x})
Represents the result of converting fixed-point value @var{x} to

5
gcc/sched-deps.c
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@ -2008,10 +2008,7 @@ sched_analyze_2 (struct deps *deps, rtx x, rtx insn)
case SYMBOL_REF:
case CONST:
case LABEL_REF:
/* Ignore constants. Note that we must handle CONST_DOUBLE here
because it may have a cc0_rtx in its CONST_DOUBLE_CHAIN field, but
this does not mean that this insn is using cc0. */
/* Ignore constants. */
if (cslr_p && sched_deps_info->finish_rhs)
sched_deps_info->finish_rhs ();