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/* OpenRISC opcode support. -*- C -*-
Copyright (C) 2000, 2001 Free Software Foundation
Based upon work by Red Hat, Inc.
This file is part of CGEN. */
/* This file is an addendum to or32.cpu. Heavy use of C code isn't
appropriate in .cpu files, so it resides here. This especially applies
to assembly/disassembly where parsing/printing can be quite involved.
Such things aren't really part of the specification of the cpu, per se,
so .cpu files provide the general framework and .opc files handle the
nitty-gritty details as necessary.
Each section is delimited with start and end markers.
<arch>-opc.h additions use: "-- opc.h"
<arch>-opc.c additions use: "-- opc.c"
<arch>-asm.c additions use: "-- asm.c"
<arch>-dis.c additions use: "-- dis.c"
<arch>-ibd.h additions use: "-- ibd.h"
*/
/* -- opc.h */
#undef CGEN_DIS_HASH_SIZE
#define CGEN_DIS_HASH_SIZE 64
#undef CGEN_DIS_HASH
#define CGEN_DIS_HASH(buffer, value) (((unsigned char *) (buffer))[0] >> 2)
extern long openrisc_sign_extend_16bit PARAMS ((long));
/* -- */
/* -- opc.c */
/* -- */
/* -- asm.c */
#define CGEN_VERBOSE_ASSEMBLER_ERRORS
static const char * parse_hi16
PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
static const char * parse_lo16
PARAMS ((CGEN_CPU_DESC, const char **, int, unsigned long *));
long
openrisc_sign_extend_16bit (value)
long value;
{
return (long) (short) value;
}
/* Handle hi(). */
static const char *
parse_hi16 (cd, strp, opindex, valuep)
CGEN_CPU_DESC cd;
const char **strp;
int opindex;
unsigned long *valuep;
{
const char *errmsg;
enum cgen_parse_operand_result result_type;
bfd_vma value;
if (**strp == '#')
++*strp;
if (strncasecmp (*strp, "hi(", 3) == 0)
{
*strp += 3;
#if 0
errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
if (errmsg != NULL)
fprintf (stderr, "parse_hi: %s\n", errmsg);
if (errmsg != NULL)
#endif
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_HI16,
&result_type, &value);
if (**strp != ')')
return "missing `)'";
++*strp;
if (errmsg == NULL
&& result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
value >>= 16;
*valuep = (long) (short) value;
return errmsg;
}
else
{
if (**strp == '-')
errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value);
else
errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) &value);
}
*valuep = (long) (short) (value & 0xffff);
return errmsg;
}
/* Handle lo(). */
static const char *
parse_lo16 (cd, strp, opindex, valuep)
CGEN_CPU_DESC cd;
const char **strp;
int opindex;
unsigned long *valuep;
{
const char *errmsg;
enum cgen_parse_operand_result result_type;
bfd_vma value;
if (**strp == '#')
++*strp;
if (strncasecmp (*strp, "lo(", 3) == 0)
{
*strp += 3;
#if 0
errmsg = cgen_parse_signed_integer (cd, strp, opindex, valuep);
if (errmsg != NULL)
fprintf (stderr, "parse_lo: %s\n", errmsg);
if (errmsg != NULL)
#endif
errmsg = cgen_parse_address (cd, strp, opindex, BFD_RELOC_LO16,
&result_type, &value);
if (**strp != ')')
return "missing `)'";
++*strp;
if (errmsg == NULL
&& result_type == CGEN_PARSE_OPERAND_RESULT_NUMBER)
value &= 0xffff;
*valuep = (long) (short) value;
return errmsg;
}
if (**strp == '-')
errmsg = cgen_parse_signed_integer (cd, strp, opindex, (long *) &value);
else
errmsg = cgen_parse_unsigned_integer (cd, strp, opindex, (unsigned long *) &value);
*valuep = (long) (short) (value & 0xffff);
return errmsg;
}
/* -- */
/* -- ibd.h */
extern long openrisc_sign_extend_16bit PARAMS ((long));
/* -- */
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