From baf0882033465cacfb31e1a197d1bc86777ae474 Mon Sep 17 00:00:00 2001 From: Fred Fish Date: Fri, 3 Jan 1997 23:28:26 +0000 Subject: [PATCH] * tic80.h (struct tic80_opcode): Name changed. (struct tic80_opcode): Remove format field. (struct tic80_operand): Add insertion and extraction functions. (TIC80_OPERAND_*): Remove old bogus values, start adding new correct ones. (FMT_*): Ditto. --- include/opcode/ChangeLog | 11 +++ include/opcode/tic80.h | 154 +++++++++++++++++++++++++++------------ 2 files changed, 119 insertions(+), 46 deletions(-) diff --git a/include/opcode/ChangeLog b/include/opcode/ChangeLog index 3ff5b23dd9f..b2899b49310 100644 --- a/include/opcode/ChangeLog +++ b/include/opcode/ChangeLog @@ -1,3 +1,14 @@ +start-sanitize-tic80 +Fri Jan 3 16:22:23 1997 Fred Fish + + * tic80.h (struct tic80_opcode): Name changed. + (struct tic80_opcode): Remove format field. + (struct tic80_operand): Add insertion and extraction functions. + (TIC80_OPERAND_*): Remove old bogus values, start adding new + correct ones. + (FMT_*): Ditto. + +end-sanitize-tic80 start-sanitize-v850 Tue Dec 31 15:05:41 1996 Michael Meissner diff --git a/include/opcode/tic80.h b/include/opcode/tic80.h index 6b259ec6560..515c56540d2 100644 --- a/include/opcode/tic80.h +++ b/include/opcode/tic80.h @@ -1,7 +1,6 @@ /* tic80.h -- Header file for TI TMS320C80 (MV) opcode table - Copyright 1996 Free Software Foundation, Inc. + Copyright 1996, 1997 Free Software Foundation, Inc. Written by Fred Fish (fnf@cygnus.com), Cygnus Support - using other opcode/*.h files as templates. This file is part of GDB, GAS, and the GNU binutils. @@ -22,35 +21,43 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * #ifndef TIC80_H #define TIC80_H -/* The opcode table is an array of struct TIc80_opcode. */ +/* The opcode table is an array of struct tic80_opcode. */ -struct TIc80_opcode +struct tic80_opcode { /* The opcode name. */ + const char *name; - /* The opcode itself. Those bits which will be filled in with - operands are zeroes. */ + /* The opcode itself. Those bits which will be filled in with operands + are zeroes. */ + unsigned long opcode; - /* The opcode mask. This is used by the disassembler. This is a - mask containing ones indicating those bits which must match the - opcode field, and zeroes indicating those bits which need not - match (and are presumably filled in by operands). */ + /* The opcode mask. This is used by the disassembler. This is a mask + containing ones indicating those bits which must match the opcode + field, and zeroes indicating those bits which need not match (and are + presumably filled in by operands). */ + unsigned long mask; - /* The format of this opcode. */ + /* The format of this opcode. I.E. short-immediate, register, long + immediate, etc. FIXME: Will this ever be used? */ + unsigned char format; - /* An array of operand codes. Each code is an index into the - operand table. They appear in the order which the operands must - appear in assembly code, and are terminated by a zero. */ + /* An array of operand codes. Each code is an index into the operand + table. They appear in the order which the operands must appear in + assembly code, and are terminated by a zero. FIXME: Adjust size to + match actual requirements when TIc80 support is complete */ + unsigned char operands[8]; }; -/* The table itself is sorted by major opcode number, and is otherwise - in the order in which the disassembler should consider - instructions. */ +/* The table itself is sorted by major opcode number, and is otherwise in + the order in which the disassembler should consider instructions. + FIXME: This isn't currently true. */ + extern const struct tic80_opcode tic80_opcodes[]; extern const int tic80_num_opcodes; @@ -60,13 +67,56 @@ extern const int tic80_num_opcodes; struct tic80_operand { /* The number of bits in the operand. */ + int bits; /* How far the operand is left shifted in the instruction. */ + int shift; + /* Insertion function. This is used by the assembler. To insert an + operand value into an instruction, check this field. + + If it is NULL, execute + i |= (op & ((1 << o->bits) - 1)) << o->shift; + (i is the instruction which we are filling in, o is a pointer to + this structure, and op is the opcode value; this assumes twos + complement arithmetic). + + If this field is not NULL, then simply call it with the + instruction and the operand value. It will return the new value + of the instruction. If the ERRMSG argument is not NULL, then if + the operand value is illegal, *ERRMSG will be set to a warning + string (the operand will be inserted in any case). If the + operand value is legal, *ERRMSG will be unchanged (most operands + can accept any value). */ + + unsigned long (*insert) PARAMS ((unsigned long instruction, long op, + const char **errmsg)); + + /* Extraction function. This is used by the disassembler. To + extract this operand type from an instruction, check this field. + + If it is NULL, compute + op = ((i) >> o->shift) & ((1 << o->bits) - 1); + if ((o->flags & PPC_OPERAND_SIGNED) != 0 + && (op & (1 << (o->bits - 1))) != 0) + op -= 1 << o->bits; + (i is the instruction, o is a pointer to this structure, and op + is the result; this assumes twos complement arithmetic). + + If this field is not NULL, then simply call it with the + instruction value. It will return the value of the operand. If + the INVALID argument is not NULL, *INVALID will be set to + non-zero if this operand type can not actually be extracted from + this operand (i.e., the instruction does not match). If the + operand is valid, *INVALID will not be changed. */ + + long (*extract) PARAMS ((unsigned long instruction, int *invalid)); + /* One bit syntax flags. */ - int flags; + + unsigned long flags; }; /* Elements in the table are retrieved by indexing with values from @@ -75,34 +125,46 @@ struct tic80_operand extern const struct tic80_operand tic80_operands[]; /* Values defined for the flags field of a struct tic80_operand. */ -#define TIC80_OPERAND_DREG 0x1 - -#define TIC80_OPERAND_AREG 0x2 - -#define TIC80_OPERAND_PSW 0x4 - -#define TIC80_OPERAND_MDR 0x8 - -#define TIC80_OPERAND_SIGNED 0x10 - -#define TIC80_OPERAND_PROMOTE 0x20 - -#define TIC80_OPERAND_PAREN 0x40 - -#define TIC80_OPERAND_REPEATED 0x80 - -#define TIC80_OPERAND_EXTENDED 0x100 - -#define TIC80_OPERAND_PCREL 0x400 - -#define TIC80_OPERAND_MEMADDR 0x800 -#define FMT_1 1 -#define FMT_2 2 -#define FMT_3 3 -#define FMT_4 4 -#define FMT_5 5 -#define FMT_6 6 -#define FMT_7 7 +/* This operand takes signed values. */ +#define TIC80_OPERAND_SIGNED (01) + +/* The next operand should be wrapped in parentheses rather than separated + from this one by a comma. This is used for various instructions, like + the load and store instructions, which want their operands to look like + "displacement(reg)" */ +#define TIC80_OPERAND_PARENS (02) + +/* This operand may use the symbolic names for the condition and size + codes that the branch instructions use, such as "eq.b", "or.f", + etc. */ +#define TIC80_OPERAND_CC_SZ (04) + +/* This operand names a register. The disassembler uses this to print + register names with a leading 'r'. */ +#define TIC80_OPERAND_GPR (010) + +/* This operand names a floating point accumulator register. The disassembler + prints these with a leading 'a'. */ +#define TIC80_OPERAND_FPA (020) + +/* This operand is a relative branch displacement. The disassembler + prints these symbolically if possible. */ +#define TIC80_OPERAND_RELATIVE (040) + +/* This flag is a hint to the disassembler for using hex as the prefered + printing format, even for small positive or negative immediate values. + Normally values in the range -999 to 999 are printed as signed decimal + values and other values are printed in hex. */ +#define TIC80_OPERAND_BITFIELD (0100) + +/* Values which go in the struct tic80_opcode format field to distinguish + between various types of instructions with the same mnemonic. FIXME: Not + currently used? */ + +#define FMT_UNUSED 0 /* Unused */ +#define FMT_SI 1 /* Short immediate format */ +#define FMT_LI 2 /* Long immediate format */ +#define FMT_REG 3 /* Register format */ #endif /* TIC80_H */ -- 2.30.2