543 lines
14 KiB
C
543 lines
14 KiB
C
/* Instruction building/extraction support for @arch@. -*- C -*-
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THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator.
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- the resultant file is machine generated, cgen-ibld.in isn't
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Copyright 1996, 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU Binutils and GDB, the GNU debugger.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* ??? Eventually more and more of this stuff can go to cpu-independent files.
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Keep that in mind. */
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#include "sysdep.h"
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#include <stdio.h>
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#include "ansidecl.h"
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#include "dis-asm.h"
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#include "bfd.h"
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#include "symcat.h"
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#include "@prefix@-desc.h"
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#include "@prefix@-opc.h"
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#include "opintl.h"
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#include "safe-ctype.h"
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#undef min
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#undef max
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#define max(a,b) ((a) > (b) ? (a) : (b))
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/* Used by the ifield rtx function. */
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#define FLD(f) (fields->f)
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static const char * insert_normal
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(CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int,
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unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR);
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static const char * insert_insn_normal
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(CGEN_CPU_DESC, const CGEN_INSN *,
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CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma);
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static int extract_normal
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(CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT,
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unsigned int, unsigned int, unsigned int, unsigned int,
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unsigned int, unsigned int, bfd_vma, long *);
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static int extract_insn_normal
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(CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *,
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CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma);
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#if CGEN_INT_INSN_P
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static void put_insn_int_value
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(CGEN_CPU_DESC, CGEN_INSN_BYTES_PTR, int, int, CGEN_INSN_INT);
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#endif
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#if ! CGEN_INT_INSN_P
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static CGEN_INLINE void insert_1
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(CGEN_CPU_DESC, unsigned long, int, int, int, unsigned char *);
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static CGEN_INLINE int fill_cache
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(CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, bfd_vma);
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static CGEN_INLINE long extract_1
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(CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, int, int, int, unsigned char *, bfd_vma);
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#endif
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/* Operand insertion. */
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#if ! CGEN_INT_INSN_P
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/* Subroutine of insert_normal. */
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static CGEN_INLINE void
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insert_1 (CGEN_CPU_DESC cd,
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unsigned long value,
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int start,
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int length,
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int word_length,
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unsigned char *bufp)
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{
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unsigned long x,mask;
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int shift;
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x = cgen_get_insn_value (cd, bufp, word_length);
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/* Written this way to avoid undefined behaviour. */
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mask = (((1L << (length - 1)) - 1) << 1) | 1;
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if (CGEN_INSN_LSB0_P)
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shift = (start + 1) - length;
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else
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shift = (word_length - (start + length));
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x = (x & ~(mask << shift)) | ((value & mask) << shift);
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cgen_put_insn_value (cd, bufp, word_length, (bfd_vma) x);
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}
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#endif /* ! CGEN_INT_INSN_P */
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/* Default insertion routine.
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ATTRS is a mask of the boolean attributes.
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WORD_OFFSET is the offset in bits from the start of the insn of the value.
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WORD_LENGTH is the length of the word in bits in which the value resides.
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START is the starting bit number in the word, architecture origin.
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LENGTH is the length of VALUE in bits.
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TOTAL_LENGTH is the total length of the insn in bits.
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The result is an error message or NULL if success. */
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/* ??? This duplicates functionality with bfd's howto table and
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bfd_install_relocation. */
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/* ??? This doesn't handle bfd_vma's. Create another function when
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necessary. */
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static const char *
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insert_normal (CGEN_CPU_DESC cd,
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long value,
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unsigned int attrs,
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unsigned int word_offset,
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unsigned int start,
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unsigned int length,
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unsigned int word_length,
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unsigned int total_length,
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CGEN_INSN_BYTES_PTR buffer)
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{
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static char errbuf[100];
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/* Written this way to avoid undefined behaviour. */
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unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1;
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/* If LENGTH is zero, this operand doesn't contribute to the value. */
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if (length == 0)
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return NULL;
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#if 0
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if (CGEN_INT_INSN_P
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&& word_offset != 0)
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abort ();
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#endif
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if (word_length > 32)
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abort ();
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/* For architectures with insns smaller than the base-insn-bitsize,
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word_length may be too big. */
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if (cd->min_insn_bitsize < cd->base_insn_bitsize)
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{
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if (word_offset == 0
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&& word_length > total_length)
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word_length = total_length;
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}
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/* Ensure VALUE will fit. */
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if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGN_OPT))
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{
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long minval = - (1L << (length - 1));
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unsigned long maxval = mask;
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if ((value > 0 && (unsigned long) value > maxval)
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|| value < minval)
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{
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/* xgettext:c-format */
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sprintf (errbuf,
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_("operand out of range (%ld not between %ld and %lu)"),
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value, minval, maxval);
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return errbuf;
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}
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}
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else if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED))
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{
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unsigned long maxval = mask;
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if ((unsigned long) value > maxval)
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{
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/* xgettext:c-format */
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sprintf (errbuf,
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_("operand out of range (%lu not between 0 and %lu)"),
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value, maxval);
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return errbuf;
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}
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}
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else
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{
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if (! cgen_signed_overflow_ok_p (cd))
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{
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long minval = - (1L << (length - 1));
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long maxval = (1L << (length - 1)) - 1;
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if (value < minval || value > maxval)
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{
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sprintf
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/* xgettext:c-format */
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(errbuf, _("operand out of range (%ld not between %ld and %ld)"),
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value, minval, maxval);
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return errbuf;
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}
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}
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}
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#if CGEN_INT_INSN_P
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{
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int shift;
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if (CGEN_INSN_LSB0_P)
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shift = (word_offset + start + 1) - length;
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else
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shift = total_length - (word_offset + start + length);
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*buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift);
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}
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#else /* ! CGEN_INT_INSN_P */
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{
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unsigned char *bufp = (unsigned char *) buffer + word_offset / 8;
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insert_1 (cd, value, start, length, word_length, bufp);
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}
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#endif /* ! CGEN_INT_INSN_P */
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return NULL;
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}
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/* Default insn builder (insert handler).
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The instruction is recorded in CGEN_INT_INSN_P byte order (meaning
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that if CGEN_INSN_BYTES_PTR is an int * and thus, the value is
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recorded in host byte order, otherwise BUFFER is an array of bytes
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and the value is recorded in target byte order).
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The result is an error message or NULL if success. */
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static const char *
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insert_insn_normal (CGEN_CPU_DESC cd,
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const CGEN_INSN * insn,
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CGEN_FIELDS * fields,
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CGEN_INSN_BYTES_PTR buffer,
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bfd_vma pc)
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{
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const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
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unsigned long value;
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const CGEN_SYNTAX_CHAR_TYPE * syn;
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CGEN_INIT_INSERT (cd);
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value = CGEN_INSN_BASE_VALUE (insn);
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/* If we're recording insns as numbers (rather than a string of bytes),
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target byte order handling is deferred until later. */
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#if CGEN_INT_INSN_P
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put_insn_int_value (cd, buffer, cd->base_insn_bitsize,
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CGEN_FIELDS_BITSIZE (fields), value);
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#else
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cgen_put_insn_value (cd, buffer, min ((unsigned) cd->base_insn_bitsize,
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(unsigned) CGEN_FIELDS_BITSIZE (fields)),
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value);
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#endif /* ! CGEN_INT_INSN_P */
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/* ??? It would be better to scan the format's fields.
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Still need to be able to insert a value based on the operand though;
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e.g. storing a branch displacement that got resolved later.
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Needs more thought first. */
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for (syn = CGEN_SYNTAX_STRING (syntax); * syn; ++ syn)
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{
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const char *errmsg;
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if (CGEN_SYNTAX_CHAR_P (* syn))
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continue;
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errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
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fields, buffer, pc);
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if (errmsg)
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return errmsg;
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}
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return NULL;
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}
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#if CGEN_INT_INSN_P
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/* Cover function to store an insn value into an integral insn. Must go here
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because it needs <prefix>-desc.h for CGEN_INT_INSN_P. */
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static void
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put_insn_int_value (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
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CGEN_INSN_BYTES_PTR buf,
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int length,
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int insn_length,
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CGEN_INSN_INT value)
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{
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/* For architectures with insns smaller than the base-insn-bitsize,
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length may be too big. */
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if (length > insn_length)
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*buf = value;
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else
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{
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int shift = insn_length - length;
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/* Written this way to avoid undefined behaviour. */
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CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1;
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*buf = (*buf & ~(mask << shift)) | ((value & mask) << shift);
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}
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}
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#endif
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/* Operand extraction. */
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#if ! CGEN_INT_INSN_P
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/* Subroutine of extract_normal.
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Ensure sufficient bytes are cached in EX_INFO.
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OFFSET is the offset in bytes from the start of the insn of the value.
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BYTES is the length of the needed value.
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Returns 1 for success, 0 for failure. */
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static CGEN_INLINE int
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fill_cache (CGEN_CPU_DESC cd ATTRIBUTE_UNUSED,
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CGEN_EXTRACT_INFO *ex_info,
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int offset,
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int bytes,
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bfd_vma pc)
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{
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/* It's doubtful that the middle part has already been fetched so
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we don't optimize that case. kiss. */
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unsigned int mask;
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disassemble_info *info = (disassemble_info *) ex_info->dis_info;
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/* First do a quick check. */
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mask = (1 << bytes) - 1;
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if (((ex_info->valid >> offset) & mask) == mask)
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return 1;
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/* Search for the first byte we need to read. */
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for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1)
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if (! (mask & ex_info->valid))
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break;
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if (bytes)
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{
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int status;
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pc += offset;
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status = (*info->read_memory_func)
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(pc, ex_info->insn_bytes + offset, bytes, info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, pc, info);
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return 0;
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}
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ex_info->valid |= ((1 << bytes) - 1) << offset;
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}
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return 1;
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}
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/* Subroutine of extract_normal. */
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static CGEN_INLINE long
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extract_1 (CGEN_CPU_DESC cd,
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CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
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int start,
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int length,
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int word_length,
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unsigned char *bufp,
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bfd_vma pc ATTRIBUTE_UNUSED)
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{
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unsigned long x;
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int shift;
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#if 0
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int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG;
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#endif
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x = cgen_get_insn_value (cd, bufp, word_length);
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if (CGEN_INSN_LSB0_P)
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shift = (start + 1) - length;
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else
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shift = (word_length - (start + length));
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return x >> shift;
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}
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#endif /* ! CGEN_INT_INSN_P */
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/* Default extraction routine.
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INSN_VALUE is the first base_insn_bitsize bits of the insn in host order,
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or sometimes less for cases like the m32r where the base insn size is 32
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but some insns are 16 bits.
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ATTRS is a mask of the boolean attributes. We only need `SIGNED',
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but for generality we take a bitmask of all of them.
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WORD_OFFSET is the offset in bits from the start of the insn of the value.
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WORD_LENGTH is the length of the word in bits in which the value resides.
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START is the starting bit number in the word, architecture origin.
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LENGTH is the length of VALUE in bits.
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TOTAL_LENGTH is the total length of the insn in bits.
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Returns 1 for success, 0 for failure. */
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/* ??? The return code isn't properly used. wip. */
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/* ??? This doesn't handle bfd_vma's. Create another function when
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necessary. */
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static int
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extract_normal (CGEN_CPU_DESC cd,
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#if ! CGEN_INT_INSN_P
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CGEN_EXTRACT_INFO *ex_info,
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#else
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CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED,
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#endif
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CGEN_INSN_INT insn_value,
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unsigned int attrs,
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unsigned int word_offset,
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unsigned int start,
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unsigned int length,
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unsigned int word_length,
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unsigned int total_length,
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#if ! CGEN_INT_INSN_P
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bfd_vma pc,
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#else
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bfd_vma pc ATTRIBUTE_UNUSED,
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#endif
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long *valuep)
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{
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long value, mask;
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/* If LENGTH is zero, this operand doesn't contribute to the value
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so give it a standard value of zero. */
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if (length == 0)
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{
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*valuep = 0;
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return 1;
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}
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#if 0
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if (CGEN_INT_INSN_P
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&& word_offset != 0)
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abort ();
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#endif
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if (word_length > 32)
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abort ();
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/* For architectures with insns smaller than the insn-base-bitsize,
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word_length may be too big. */
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if (cd->min_insn_bitsize < cd->base_insn_bitsize)
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{
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if (word_offset == 0
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&& word_length > total_length)
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word_length = total_length;
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}
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/* Does the value reside in INSN_VALUE, and at the right alignment? */
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if (CGEN_INT_INSN_P || (word_offset == 0 && word_length == total_length))
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{
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if (CGEN_INSN_LSB0_P)
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value = insn_value >> ((word_offset + start + 1) - length);
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else
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value = insn_value >> (total_length - ( word_offset + start + length));
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}
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#if ! CGEN_INT_INSN_P
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else
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{
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unsigned char *bufp = ex_info->insn_bytes + word_offset / 8;
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if (word_length > 32)
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abort ();
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if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0)
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return 0;
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value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc);
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}
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#endif /* ! CGEN_INT_INSN_P */
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/* Written this way to avoid undefined behaviour. */
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mask = (((1L << (length - 1)) - 1) << 1) | 1;
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value &= mask;
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/* sign extend? */
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if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)
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&& (value & (1L << (length - 1))))
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value |= ~mask;
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*valuep = value;
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return 1;
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}
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/* Default insn extractor.
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INSN_VALUE is the first base_insn_bitsize bits, translated to host order.
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The extracted fields are stored in FIELDS.
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EX_INFO is used to handle reading variable length insns.
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Return the length of the insn in bits, or 0 if no match,
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or -1 if an error occurs fetching data (memory_error_func will have
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been called). */
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static int
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extract_insn_normal (CGEN_CPU_DESC cd,
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const CGEN_INSN *insn,
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CGEN_EXTRACT_INFO *ex_info,
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CGEN_INSN_INT insn_value,
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CGEN_FIELDS *fields,
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bfd_vma pc)
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{
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const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn);
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const CGEN_SYNTAX_CHAR_TYPE *syn;
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CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn);
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CGEN_INIT_EXTRACT (cd);
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||
|
||
for (syn = CGEN_SYNTAX_STRING (syntax); *syn; ++syn)
|
||
{
|
||
int length;
|
||
|
||
if (CGEN_SYNTAX_CHAR_P (*syn))
|
||
continue;
|
||
|
||
length = (* cd->extract_operand) (cd, CGEN_SYNTAX_FIELD (*syn),
|
||
ex_info, insn_value, fields, pc);
|
||
if (length <= 0)
|
||
return length;
|
||
}
|
||
|
||
/* We recognized and successfully extracted this insn. */
|
||
return CGEN_INSN_BITSIZE (insn);
|
||
}
|
||
|
||
/* machine generated code added here */
|