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author | Ben Elliston <bje@au.ibm.com> | 2000-08-04 02:21:43 +0000 |
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committer | Ben Elliston <bje@au.ibm.com> | 2000-08-04 02:21:43 +0000 |
commit | f6e6b40ff59365e1c8698764eea9fd1818bdb02a (patch) | |
tree | fcdef4cd21a293a5f5ef007dcc2f2a2b84802d76 /opcodes/cgen-ibld.in | |
parent | ab3e48dc5d2dcbb1431ac82717db9ff02bb9473f (diff) | |
download | fsf-binutils-gdb-f6e6b40ff59365e1c8698764eea9fd1818bdb02a.zip fsf-binutils-gdb-f6e6b40ff59365e1c8698764eea9fd1818bdb02a.tar.gz fsf-binutils-gdb-f6e6b40ff59365e1c8698764eea9fd1818bdb02a.tar.bz2 |
2000-08-04 Ben Elliston <bje@redhat.com>
* cgen-dis.in, cgen-asm.in, cgen-ibld.in: New files.
* cgen.sh: Likewise.
Diffstat (limited to 'opcodes/cgen-ibld.in')
-rw-r--r-- | opcodes/cgen-ibld.in | 570 |
1 files changed, 570 insertions, 0 deletions
diff --git a/opcodes/cgen-ibld.in b/opcodes/cgen-ibld.in new file mode 100644 index 0000000..6394fe0 --- /dev/null +++ b/opcodes/cgen-ibld.in @@ -0,0 +1,570 @@ +/* Instruction building/extraction support for @arch@. -*- C -*- + +THIS FILE IS MACHINE GENERATED WITH CGEN: Cpu tools GENerator. +- the resultant file is machine generated, cgen-ibld.in isn't + +Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. + +This file is part of the GNU Binutils and GDB, the GNU debugger. + +This program 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 2, or (at your option) +any later version. + +This program 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 this program; if not, write to the Free Software Foundation, Inc., +59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +/* ??? Eventually more and more of this stuff can go to cpu-independent files. + Keep that in mind. */ + +#include "sysdep.h" +#include <ctype.h> +#include <stdio.h> +#include "ansidecl.h" +#include "dis-asm.h" +#include "bfd.h" +#include "symcat.h" +#include "@prefix@-desc.h" +#include "@prefix@-opc.h" +#include "opintl.h" + +#undef min +#define min(a,b) ((a) < (b) ? (a) : (b)) +#undef max +#define max(a,b) ((a) > (b) ? (a) : (b)) + +/* Used by the ifield rtx function. */ +#define FLD(f) (fields->f) + +static const char * insert_normal + PARAMS ((CGEN_CPU_DESC, long, unsigned int, unsigned int, unsigned int, + unsigned int, unsigned int, unsigned int, CGEN_INSN_BYTES_PTR)); +static const char * insert_insn_normal + PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, + CGEN_FIELDS *, CGEN_INSN_BYTES_PTR, bfd_vma)); + +static int extract_normal + PARAMS ((CGEN_CPU_DESC, CGEN_EXTRACT_INFO *, CGEN_INSN_INT, + unsigned int, unsigned int, unsigned int, unsigned int, + unsigned int, unsigned int, bfd_vma, long *)); +static int extract_insn_normal + PARAMS ((CGEN_CPU_DESC, const CGEN_INSN *, CGEN_EXTRACT_INFO *, + CGEN_INSN_INT, CGEN_FIELDS *, bfd_vma)); + +/* Operand insertion. */ + +#if ! CGEN_INT_INSN_P + +/* Subroutine of insert_normal. */ + +static CGEN_INLINE void +insert_1 (cd, value, start, length, word_length, bufp) + CGEN_CPU_DESC cd; + unsigned long value; + int start,length,word_length; + unsigned char *bufp; +{ + unsigned long x,mask; + int shift; + int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; + + switch (word_length) + { + case 8: + x = *bufp; + break; + case 16: + if (big_p) + x = bfd_getb16 (bufp); + else + x = bfd_getl16 (bufp); + break; + case 24: + /* ??? This may need reworking as these cases don't necessarily + want the first byte and the last two bytes handled like this. */ + if (big_p) + x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); + else + x = bfd_getl16 (bufp) | (bufp[2] << 16); + break; + case 32: + if (big_p) + x = bfd_getb32 (bufp); + else + x = bfd_getl32 (bufp); + break; + default : + abort (); + } + + /* Written this way to avoid undefined behaviour. */ + mask = (((1L << (length - 1)) - 1) << 1) | 1; + if (CGEN_INSN_LSB0_P) + shift = (start + 1) - length; + else + shift = (word_length - (start + length)); + x = (x & ~(mask << shift)) | ((value & mask) << shift); + + switch (word_length) + { + case 8: + *bufp = x; + break; + case 16: + if (big_p) + bfd_putb16 (x, bufp); + else + bfd_putl16 (x, bufp); + break; + case 24: + /* ??? This may need reworking as these cases don't necessarily + want the first byte and the last two bytes handled like this. */ + if (big_p) + { + bufp[0] = x >> 16; + bfd_putb16 (x, bufp + 1); + } + else + { + bfd_putl16 (x, bufp); + bufp[2] = x >> 16; + } + break; + case 32: + if (big_p) + bfd_putb32 (x, bufp); + else + bfd_putl32 (x, bufp); + break; + default : + abort (); + } +} + +#endif /* ! CGEN_INT_INSN_P */ + +/* Default insertion routine. + + ATTRS is a mask of the boolean attributes. + WORD_OFFSET is the offset in bits from the start of the insn of the value. + WORD_LENGTH is the length of the word in bits in which the value resides. + START is the starting bit number in the word, architecture origin. + LENGTH is the length of VALUE in bits. + TOTAL_LENGTH is the total length of the insn in bits. + + The result is an error message or NULL if success. */ + +/* ??? This duplicates functionality with bfd's howto table and + bfd_install_relocation. */ +/* ??? This doesn't handle bfd_vma's. Create another function when + necessary. */ + +static const char * +insert_normal (cd, value, attrs, word_offset, start, length, word_length, + total_length, buffer) + CGEN_CPU_DESC cd; + long value; + unsigned int attrs; + unsigned int word_offset, start, length, word_length, total_length; + CGEN_INSN_BYTES_PTR buffer; +{ + static char errbuf[100]; + /* Written this way to avoid undefined behaviour. */ + unsigned long mask = (((1L << (length - 1)) - 1) << 1) | 1; + + /* If LENGTH is zero, this operand doesn't contribute to the value. */ + if (length == 0) + return NULL; + + if (CGEN_INT_INSN_P + && word_offset != 0) + abort (); + + if (word_length > 32) + abort (); + + /* For architectures with insns smaller than the base-insn-bitsize, + word_length may be too big. */ + if (cd->min_insn_bitsize < cd->base_insn_bitsize) + { + if (word_offset == 0 + && word_length > total_length) + word_length = total_length; + } + + /* Ensure VALUE will fit. */ + if (! CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED)) + { + unsigned long maxval = mask; + + if ((unsigned long) value > maxval) + { + /* xgettext:c-format */ + sprintf (errbuf, + _("operand out of range (%lu not between 0 and %lu)"), + value, maxval); + return errbuf; + } + } + else + { + if (! cgen_signed_overflow_ok_p (cd)) + { + long minval = - (1L << (length - 1)); + long maxval = (1L << (length - 1)) - 1; + + if (value < minval || value > maxval) + { + sprintf + /* xgettext:c-format */ + (errbuf, _("operand out of range (%ld not between %ld and %ld)"), + value, minval, maxval); + return errbuf; + } + } + } + +#if CGEN_INT_INSN_P + + { + int shift; + + if (CGEN_INSN_LSB0_P) + shift = (start + 1) - length; + else + shift = word_length - (start + length); + *buffer = (*buffer & ~(mask << shift)) | ((value & mask) << shift); + } + +#else /* ! CGEN_INT_INSN_P */ + + { + unsigned char *bufp = (unsigned char *) buffer + word_offset / 8; + + insert_1 (cd, value, start, length, word_length, bufp); + } + +#endif /* ! CGEN_INT_INSN_P */ + + return NULL; +} + +/* Default insn builder (insert handler). + The instruction is recorded in CGEN_INT_INSN_P byte order + (meaning that if CGEN_INT_INSN_P BUFFER is an int * and thus the value is + recorded in host byte order, otherwise BUFFER is an array of bytes and the + value is recorded in target byte order). + The result is an error message or NULL if success. */ + +static const char * +insert_insn_normal (cd, insn, fields, buffer, pc) + CGEN_CPU_DESC cd; + const CGEN_INSN * insn; + CGEN_FIELDS * fields; + CGEN_INSN_BYTES_PTR buffer; + bfd_vma pc; +{ + const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); + unsigned long value; + const unsigned char * syn; + + CGEN_INIT_INSERT (cd); + value = CGEN_INSN_BASE_VALUE (insn); + + /* If we're recording insns as numbers (rather than a string of bytes), + target byte order handling is deferred until later. */ + +#if CGEN_INT_INSN_P + + *buffer = value; + +#else + + cgen_put_insn_value (cd, buffer, min (cd->base_insn_bitsize, + CGEN_FIELDS_BITSIZE (fields)), + value); + +#endif /* ! CGEN_INT_INSN_P */ + + /* ??? It would be better to scan the format's fields. + Still need to be able to insert a value based on the operand though; + e.g. storing a branch displacement that got resolved later. + Needs more thought first. */ + + for (syn = CGEN_SYNTAX_STRING (syntax); * syn != '\0'; ++ syn) + { + const char *errmsg; + + if (CGEN_SYNTAX_CHAR_P (* syn)) + continue; + + errmsg = (* cd->insert_operand) (cd, CGEN_SYNTAX_FIELD (*syn), + fields, buffer, pc); + if (errmsg) + return errmsg; + } + + return NULL; +} + +/* Operand extraction. */ + +#if ! CGEN_INT_INSN_P + +/* Subroutine of extract_normal. + Ensure sufficient bytes are cached in EX_INFO. + OFFSET is the offset in bytes from the start of the insn of the value. + BYTES is the length of the needed value. + Returns 1 for success, 0 for failure. */ + +static CGEN_INLINE int +fill_cache (cd, ex_info, offset, bytes, pc) + CGEN_CPU_DESC cd; + CGEN_EXTRACT_INFO *ex_info; + int offset, bytes; + bfd_vma pc; +{ + /* It's doubtful that the middle part has already been fetched so + we don't optimize that case. kiss. */ + int mask; + disassemble_info *info = (disassemble_info *) ex_info->dis_info; + + /* First do a quick check. */ + mask = (1 << bytes) - 1; + if (((ex_info->valid >> offset) & mask) == mask) + return 1; + + /* Search for the first byte we need to read. */ + for (mask = 1 << offset; bytes > 0; --bytes, ++offset, mask <<= 1) + if (! (mask & ex_info->valid)) + break; + + if (bytes) + { + int status; + + pc += offset; + status = (*info->read_memory_func) + (pc, ex_info->insn_bytes + offset, bytes, info); + + if (status != 0) + { + (*info->memory_error_func) (status, pc, info); + return 0; + } + + ex_info->valid |= ((1 << bytes) - 1) << offset; + } + + return 1; +} + +/* Subroutine of extract_normal. */ + +static CGEN_INLINE long +extract_1 (cd, ex_info, start, length, word_length, bufp, pc) + CGEN_CPU_DESC cd; + CGEN_EXTRACT_INFO *ex_info; + int start,length,word_length; + unsigned char *bufp; + bfd_vma pc; +{ + unsigned long x,mask; + int shift; + int big_p = CGEN_CPU_INSN_ENDIAN (cd) == CGEN_ENDIAN_BIG; + + switch (word_length) + { + case 8: + x = *bufp; + break; + case 16: + if (big_p) + x = bfd_getb16 (bufp); + else + x = bfd_getl16 (bufp); + break; + case 24: + /* ??? This may need reworking as these cases don't necessarily + want the first byte and the last two bytes handled like this. */ + if (big_p) + x = (bufp[0] << 16) | bfd_getb16 (bufp + 1); + else + x = bfd_getl16 (bufp) | (bufp[2] << 16); + break; + case 32: + if (big_p) + x = bfd_getb32 (bufp); + else + x = bfd_getl32 (bufp); + break; + default : + abort (); + } + + /* Written this way to avoid undefined behaviour. */ + mask = (((1L << (length - 1)) - 1) << 1) | 1; + if (CGEN_INSN_LSB0_P) + shift = (start + 1) - length; + else + shift = (word_length - (start + length)); + return (x >> shift) & mask; +} + +#endif /* ! CGEN_INT_INSN_P */ + +/* Default extraction routine. + + INSN_VALUE is the first base_insn_bitsize bits of the insn in host order, + or sometimes less for cases like the m32r where the base insn size is 32 + but some insns are 16 bits. + ATTRS is a mask of the boolean attributes. We only need `SIGNED', + but for generality we take a bitmask of all of them. + WORD_OFFSET is the offset in bits from the start of the insn of the value. + WORD_LENGTH is the length of the word in bits in which the value resides. + START is the starting bit number in the word, architecture origin. + LENGTH is the length of VALUE in bits. + TOTAL_LENGTH is the total length of the insn in bits. + + Returns 1 for success, 0 for failure. */ + +/* ??? The return code isn't properly used. wip. */ + +/* ??? This doesn't handle bfd_vma's. Create another function when + necessary. */ + +static int +extract_normal (cd, ex_info, insn_value, attrs, word_offset, start, length, + word_length, total_length, pc, valuep) + CGEN_CPU_DESC cd; +#if ! CGEN_INT_INSN_P + CGEN_EXTRACT_INFO *ex_info; +#else + CGEN_EXTRACT_INFO *ex_info ATTRIBUTE_UNUSED; +#endif + CGEN_INSN_INT insn_value; + unsigned int attrs; + unsigned int word_offset, start, length, word_length, total_length; +#if ! CGEN_INT_INSN_P + bfd_vma pc; +#else + bfd_vma pc ATTRIBUTE_UNUSED; +#endif + long *valuep; +{ + CGEN_INSN_INT value; + + /* If LENGTH is zero, this operand doesn't contribute to the value + so give it a standard value of zero. */ + if (length == 0) + { + *valuep = 0; + return 1; + } + + if (CGEN_INT_INSN_P + && word_offset != 0) + abort (); + + if (word_length > 32) + abort (); + + /* For architectures with insns smaller than the insn-base-bitsize, + word_length may be too big. */ + if (cd->min_insn_bitsize < cd->base_insn_bitsize) + { + if (word_offset == 0 + && word_length > total_length) + word_length = total_length; + } + + /* Does the value reside in INSN_VALUE? */ + + if (word_offset == 0) + { + /* Written this way to avoid undefined behaviour. */ + CGEN_INSN_INT mask = (((1L << (length - 1)) - 1) << 1) | 1; + + if (CGEN_INSN_LSB0_P) + value = insn_value >> ((start + 1) - length); + else + value = insn_value >> (word_length - (start + length)); + value &= mask; + /* sign extend? */ + if (CGEN_BOOL_ATTR (attrs, CGEN_IFLD_SIGNED) + && (value & (1L << (length - 1)))) + value |= ~mask; + } + +#if ! CGEN_INT_INSN_P + + else + { + unsigned char *bufp = ex_info->insn_bytes + word_offset / 8; + + if (word_length > 32) + abort (); + + if (fill_cache (cd, ex_info, word_offset / 8, word_length / 8, pc) == 0) + return 0; + + value = extract_1 (cd, ex_info, start, length, word_length, bufp, pc); + } + +#endif /* ! CGEN_INT_INSN_P */ + + *valuep = value; + + return 1; +} + +/* Default insn extractor. + + INSN_VALUE is the first base_insn_bitsize bits, translated to host order. + The extracted fields are stored in FIELDS. + EX_INFO is used to handle reading variable length insns. + Return the length of the insn in bits, or 0 if no match, + or -1 if an error occurs fetching data (memory_error_func will have + been called). */ + +static int +extract_insn_normal (cd, insn, ex_info, insn_value, fields, pc) + CGEN_CPU_DESC cd; + const CGEN_INSN *insn; + CGEN_EXTRACT_INFO *ex_info; + CGEN_INSN_INT insn_value; + CGEN_FIELDS *fields; + bfd_vma pc; +{ + const CGEN_SYNTAX *syntax = CGEN_INSN_SYNTAX (insn); + const unsigned char *syn; + + CGEN_FIELDS_BITSIZE (fields) = CGEN_INSN_BITSIZE (insn); + + CGEN_INIT_EXTRACT (cd); + + 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 */ |