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/* M32C Pragma support
Copyright (C) 2004-2016 Free Software Foundation, Inc.
Contributed by Red Hat, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "c-family/c-common.h"
#include "c-family/c-pragma.h"
#include "m32c-protos.h"
/* Implements the "GCC memregs" pragma. This pragma takes only an
integer, and is semantically identical to the -memregs= command
line option. The only catch is, the programmer should only use
this pragma at the beginning of the file (preferably, in some
project-wide header) to avoid ABI changes related to changing the
list of available "registers". */
static void
m32c_pragma_memregs (cpp_reader * reader ATTRIBUTE_UNUSED)
{
/* on off */
tree val;
enum cpp_ttype type;
HOST_WIDE_INT i;
type = pragma_lex (&val);
if (type == CPP_NUMBER)
{
if (tree_fits_uhwi_p (val))
{
i = tree_to_uhwi (val);
type = pragma_lex (&val);
if (type != CPP_EOF)
warning (0, "junk at end of #pragma GCC memregs [0..16]");
if (0 <= i && i <= 16)
{
if (!ok_to_change_target_memregs)
{
warning (0,
"#pragma GCC memregs must precede any function decls");
return;
}
target_memregs = i;
m32c_conditional_register_usage ();
}
else
{
warning (0, "#pragma GCC memregs takes a number [0..16]");
}
return;
}
}
error ("#pragma GCC memregs takes a number [0..16]");
}
/* Implements the "pragma ADDRESS" pragma. This pragma takes a
variable name and an address, and arranges for that variable to be
"at" that address. The variable is also made volatile. */
static void
m32c_pragma_address (cpp_reader * reader ATTRIBUTE_UNUSED)
{
/* on off */
tree var, addr;
enum cpp_ttype type;
type = pragma_lex (&var);
if (type == CPP_NAME)
{
type = pragma_lex (&addr);
if (type == CPP_NUMBER)
{
if (var != error_mark_node)
{
unsigned uaddr = tree_to_uhwi (addr);
m32c_note_pragma_address (IDENTIFIER_POINTER (var), uaddr);
}
type = pragma_lex (&var);
if (type != CPP_EOF)
{
error ("junk at end of #pragma ADDRESS");
}
return;
}
}
error ("malformed #pragma ADDRESS variable address");
}
/* Implements REGISTER_TARGET_PRAGMAS. */
void
m32c_register_pragmas (void)
{
c_register_pragma ("GCC", "memregs", m32c_pragma_memregs);
c_register_pragma (NULL, "ADDRESS", m32c_pragma_address);
c_register_pragma (NULL, "address", m32c_pragma_address);
/* R8C and M16C have 16-bit pointers in a 20-bit address zpace.
M32C has 24-bit pointers in a 24-bit address space, so does not
need far pointers, but we accept the qualifier anyway, as a
no-op. */
if (TARGET_A16)
c_register_addr_space ("__far", ADDR_SPACE_FAR);
else
c_register_addr_space ("__far", ADDR_SPACE_GENERIC);
}
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