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Diffstat (limited to 'opcodes/arc-opc.c')
| -rw-r--r-- | opcodes/arc-opc.c | 1131 |
1 files changed, 0 insertions, 1131 deletions
diff --git a/opcodes/arc-opc.c b/opcodes/arc-opc.c deleted file mode 100644 index 0f8f6895965..00000000000 --- a/opcodes/arc-opc.c +++ /dev/null @@ -1,1131 +0,0 @@ -/* Opcode table for the ARC. - Copyright (c) 1994, 1995, 1997, 1998 Free Software Foundation, Inc. - Contributed by Doug Evans (dje@cygnus.com). - - 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. */ - -#include <stdio.h> -#include "ansidecl.h" -#include "opcode/arc.h" -#include "opintl.h" - -#ifndef NULL -#define NULL 0 -#endif - -#define INSERT_FN(fn) \ -static arc_insn fn PARAMS ((arc_insn, const struct arc_operand *, \ - int, const struct arc_operand_value *, long, \ - const char **)) -#define EXTRACT_FN(fn) \ -static long fn PARAMS ((arc_insn *, const struct arc_operand *, \ - int, const struct arc_operand_value **, int *)) - -INSERT_FN (insert_reg); -INSERT_FN (insert_shimmfinish); -INSERT_FN (insert_limmfinish); -INSERT_FN (insert_shimmoffset); -INSERT_FN (insert_shimmzero); -INSERT_FN (insert_flag); -INSERT_FN (insert_flagfinish); -INSERT_FN (insert_cond); -INSERT_FN (insert_forcelimm); -INSERT_FN (insert_reladdr); -INSERT_FN (insert_absaddr); -INSERT_FN (insert_unopmacro); - -EXTRACT_FN (extract_reg); -EXTRACT_FN (extract_flag); -EXTRACT_FN (extract_cond); -EXTRACT_FN (extract_reladdr); -EXTRACT_FN (extract_unopmacro); - -/* Various types of ARC operands, including insn suffixes. */ - -/* Insn format values: - - 'a' REGA register A field - 'b' REGB register B field - 'c' REGC register C field - 'S' SHIMMFINISH finish inserting a shimm value - 'L' LIMMFINISH finish inserting a limm value - 'd' SHIMMOFFSET shimm offset in ld,st insns - '0' SHIMMZERO 0 shimm value in ld,st insns - 'f' FLAG F flag - 'F' FLAGFINISH finish inserting the F flag - 'G' FLAGINSN insert F flag in "flag" insn - 'n' DELAY N field (nullify field) - 'q' COND condition code field - 'Q' FORCELIMM set `cond_p' to 1 to ensure a constant is a limm - 'B' BRANCH branch address (22 bit pc relative) - 'J' JUMP jump address (26 bit absolute) - 'z' SIZE1 size field in ld a,[b,c] - 'Z' SIZE10 size field in ld a,[b,shimm] - 'y' SIZE22 size field in st c,[b,shimm] - 'x' SIGN0 sign extend field ld a,[b,c] - 'X' SIGN9 sign extend field ld a,[b,shimm] - 'w' ADDRESS3 write-back field in ld a,[b,c] - 'W' ADDRESS12 write-back field in ld a,[b,shimm] - 'v' ADDRESS24 write-back field in st c,[b,shimm] - 'e' CACHEBYPASS5 cache bypass in ld a,[b,c] - 'E' CACHEBYPASS14 cache bypass in ld a,[b,shimm] - 'D' CACHEBYPASS26 cache bypass in st c,[b,shimm] - 'U' UNOPMACRO fake operand to copy REGB to REGC for unop macros - - The following modifiers may appear between the % and char (eg: %.f): - - '.' MODDOT '.' prefix must be present - 'r' REG generic register value, for register table - 'A' AUXREG auxiliary register in lr a,[b], sr c,[b] - - Fields are: - - CHAR BITS SHIFT FLAGS INSERT_FN EXTRACT_FN -*/ - -const struct arc_operand arc_operands[] = -{ -/* place holder (??? not sure if needed) */ -#define UNUSED 0 - { 0 }, - -/* register A or shimm/limm indicator */ -#define REGA (UNUSED + 1) - { 'a', 6, ARC_SHIFT_REGA, ARC_OPERAND_SIGNED, insert_reg, extract_reg }, - -/* register B or shimm/limm indicator */ -#define REGB (REGA + 1) - { 'b', 6, ARC_SHIFT_REGB, ARC_OPERAND_SIGNED, insert_reg, extract_reg }, - -/* register C or shimm/limm indicator */ -#define REGC (REGB + 1) - { 'c', 6, ARC_SHIFT_REGC, ARC_OPERAND_SIGNED, insert_reg, extract_reg }, - -/* fake operand used to insert shimm value into most instructions */ -#define SHIMMFINISH (REGC + 1) - { 'S', 9, 0, ARC_OPERAND_SIGNED + ARC_OPERAND_FAKE, insert_shimmfinish, 0 }, - -/* fake operand used to insert limm value into most instructions. */ -#define LIMMFINISH (SHIMMFINISH + 1) - { 'L', 32, 32, ARC_OPERAND_ADDRESS + ARC_OPERAND_LIMM + ARC_OPERAND_FAKE, insert_limmfinish, 0 }, - -/* shimm operand when there is no reg indicator (ld,st) */ -#define SHIMMOFFSET (LIMMFINISH + 1) - { 'd', 9, 0, ARC_OPERAND_SIGNED, insert_shimmoffset, 0 }, - -/* 0 shimm operand for ld,st insns */ -#define SHIMMZERO (SHIMMOFFSET + 1) - { '0', 9, 0, ARC_OPERAND_FAKE, insert_shimmzero, 0 }, - -/* flag update bit (insertion is defered until we know how) */ -#define FLAG (SHIMMZERO + 1) - { 'f', 1, 8, ARC_OPERAND_SUFFIX, insert_flag, extract_flag }, - -/* fake utility operand to finish 'f' suffix handling */ -#define FLAGFINISH (FLAG + 1) - { 'F', 1, 8, ARC_OPERAND_FAKE, insert_flagfinish, 0 }, - -/* fake utility operand to set the 'f' flag for the "flag" insn */ -#define FLAGINSN (FLAGFINISH + 1) - { 'G', 1, 8, ARC_OPERAND_FAKE, insert_flag, 0 }, - -/* branch delay types */ -#define DELAY (FLAGINSN + 1) - { 'n', 2, 5, ARC_OPERAND_SUFFIX }, - -/* conditions */ -#define COND (DELAY + 1) - { 'q', 5, 0, ARC_OPERAND_SUFFIX, insert_cond, extract_cond }, - -/* set `cond_p' to 1 to ensure a constant is treated as a limm */ -#define FORCELIMM (COND + 1) - { 'Q', 0, 0, ARC_OPERAND_FAKE, insert_forcelimm }, - -/* branch address; b, bl, and lp insns */ -#define BRANCH (FORCELIMM + 1) - { 'B', 20, 7, ARC_OPERAND_RELATIVE_BRANCH + ARC_OPERAND_SIGNED, insert_reladdr, extract_reladdr }, - -/* jump address; j insn (this is basically the same as 'L' except that the - value is right shifted by 2) */ -#define JUMP (BRANCH + 1) - { 'J', 24, 32, ARC_OPERAND_ABSOLUTE_BRANCH + ARC_OPERAND_LIMM + ARC_OPERAND_FAKE, insert_absaddr }, - -/* size field, stored in bit 1,2 */ -#define SIZE1 (JUMP + 1) - { 'z', 2, 1, ARC_OPERAND_SUFFIX }, - -/* size field, stored in bit 10,11 */ -#define SIZE10 (SIZE1 + 1) - { 'Z', 2, 10, ARC_OPERAND_SUFFIX, }, - -/* size field, stored in bit 22,23 */ -#define SIZE22 (SIZE10 + 1) - { 'y', 2, 22, ARC_OPERAND_SUFFIX, }, - -/* sign extend field, stored in bit 0 */ -#define SIGN0 (SIZE22 + 1) - { 'x', 1, 0, ARC_OPERAND_SUFFIX }, - -/* sign extend field, stored in bit 9 */ -#define SIGN9 (SIGN0 + 1) - { 'X', 1, 9, ARC_OPERAND_SUFFIX }, - -/* address write back, stored in bit 3 */ -#define ADDRESS3 (SIGN9 + 1) - { 'w', 1, 3, ARC_OPERAND_SUFFIX }, - -/* address write back, stored in bit 12 */ -#define ADDRESS12 (ADDRESS3 + 1) - { 'W', 1, 12, ARC_OPERAND_SUFFIX }, - -/* address write back, stored in bit 24 */ -#define ADDRESS24 (ADDRESS12 + 1) - { 'v', 1, 24, ARC_OPERAND_SUFFIX }, - -/* cache bypass, stored in bit 5 */ -#define CACHEBYPASS5 (ADDRESS24 + 1) - { 'e', 1, 5, ARC_OPERAND_SUFFIX }, - -/* cache bypass, stored in bit 14 */ -#define CACHEBYPASS14 (CACHEBYPASS5 + 1) - { 'E', 1, 14, ARC_OPERAND_SUFFIX }, - -/* cache bypass, stored in bit 26 */ -#define CACHEBYPASS26 (CACHEBYPASS14 + 1) - { 'D', 1, 26, ARC_OPERAND_SUFFIX }, - -/* unop macro, used to copy REGB to REGC */ -#define UNOPMACRO (CACHEBYPASS26 + 1) - { 'U', 6, ARC_SHIFT_REGC, ARC_OPERAND_FAKE, insert_unopmacro, extract_unopmacro }, - -/* '.' modifier ('.' required). */ -#define MODDOT (UNOPMACRO + 1) - { '.', 1, 0, ARC_MOD_DOT }, - -/* Dummy 'r' modifier for the register table. - It's called a "dummy" because there's no point in inserting an 'r' into all - the %a/%b/%c occurrences in the insn table. */ -#define REG (MODDOT + 1) - { 'r', 6, 0, ARC_MOD_REG }, - -/* Known auxiliary register modifier (stored in shimm field). */ -#define AUXREG (REG + 1) - { 'A', 9, 0, ARC_MOD_AUXREG }, - -/* end of list place holder */ - { 0 } -}; - -/* Given a format letter, yields the index into `arc_operands'. - eg: arc_operand_map['a'] = REGA. */ -unsigned char arc_operand_map[256]; - -#define I(x) (((x) & 31) << 27) -#define A(x) (((x) & ARC_MASK_REG) << ARC_SHIFT_REGA) -#define B(x) (((x) & ARC_MASK_REG) << ARC_SHIFT_REGB) -#define C(x) (((x) & ARC_MASK_REG) << ARC_SHIFT_REGC) -#define R(x,b,m) (((x) & (m)) << (b)) /* value X, mask M, at bit B */ - -/* ARC instructions. - - Longer versions of insns must appear before shorter ones (if gas sees - "lsr r2,r3,1" when it's parsing "lsr %a,%b" it will think the ",1" is - junk). This isn't necessary for `ld' because of the trailing ']'. - - Instructions that are really macros based on other insns must appear - before the real insn so they're chosen when disassembling. Eg: The `mov' - insn is really the `and' insn. - - This table is best viewed on a wide screen (161 columns). I'd prefer to - keep it this way. The rest of the file, however, should be viewable on an - 80 column terminal. */ - -/* ??? This table also includes macros: asl, lsl, and mov. The ppc port has - a more general facility for dealing with macros which could be used if - we need to. */ - -/* This table can't be `const' because members `next_asm' and `next_dis' are - computed at run-time. We could split this into two, but that doesn't seem - worth it. */ - -struct arc_opcode arc_opcodes[] = { - - /* Macros appear first. */ - /* "mov" is really an "and". */ - { "mov%.q%.f %a,%b%F%S%L%U", I(-1), I(12) }, - /* "asl" is really an "add". */ - { "asl%.q%.f %a,%b%F%S%L%U", I(-1), I(8) }, - /* "lsl" is really an "add". */ - { "lsl%.q%.f %a,%b%F%S%L%U", I(-1), I(8) }, - /* "nop" is really an "xor". */ - { "nop", 0xffffffff, 0x7fffffff }, - /* "rlc" is really an "adc". */ - { "rlc%.q%.f %a,%b%F%S%L%U", I(-1), I(9) }, - - /* The rest of these needn't be sorted, but it helps to find them if they are. */ - { "adc%.q%.f %a,%b,%c%F%S%L", I(-1), I(9) }, - { "add%.q%.f %a,%b,%c%F%S%L", I(-1), I(8) }, - { "and%.q%.f %a,%b,%c%F%S%L", I(-1), I(12) }, - { "asr%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(1) }, - { "bic%.q%.f %a,%b,%c%F%S%L", I(-1), I(14) }, - { "b%q%.n %B", I(-1), I(4), ARC_OPCODE_COND_BRANCH }, - { "bl%q%.n %B", I(-1), I(5), ARC_OPCODE_COND_BRANCH }, - { "extb%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(7) }, - { "extw%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(8) }, - { "flag%.q %b%G%S%L", I(-1)+A(-1)+C(-1), I(3)+A(ARC_REG_SHIMM_UPDATE)+C(0) }, - /* %Q: force cond_p=1 --> no shimm values */ - /* ??? This insn allows an optional flags spec. */ - { "j%q%Q%.n%.f %b%J", I(-1)+A(-1)+C(-1)+R(-1,7,1), I(7)+A(0)+C(0)+R(0,7,1) }, - /* Put opcode 1 ld insns first so shimm gets prefered over limm. */ - /* "[%b]" is before "[%b,%d]" so 0 offsets don't get printed. */ - { "ld%Z%.X%.W%.E %0%a,[%b]%L", I(-1)+R(-1,13,1)+R(-1,0,511), I(1)+R(0,13,1)+R(0,0,511) }, - { "ld%Z%.X%.W%.E %a,[%b,%d]%S%L", I(-1)+R(-1,13,1), I(1)+R(0,13,1) }, - { "ld%z%.x%.w%.e%Q %a,[%b,%c]%L", I(-1)+R(-1,4,1)+R(-1,6,7), I(0)+R(0,4,1)+R(0,6,7) }, - { "lp%q%.n %B", I(-1), I(6), }, - { "lr %a,[%Ab]%S%L", I(-1)+C(-1), I(1)+C(0x10) }, - { "lsr%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(2) }, - { "or%.q%.f %a,%b,%c%F%S%L", I(-1), I(13) }, - { "ror%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(3) }, - { "rrc%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(4) }, - { "sbc%.q%.f %a,%b,%c%F%S%L", I(-1), I(11) }, - { "sexb%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(5) }, - { "sexw%.q%.f %a,%b%F%S%L", I(-1)+C(-1), I(3)+C(6) }, - { "sr %c,[%Ab]%S%L", I(-1)+A(-1), I(2)+A(0x10) }, - /* "[%b]" is before "[%b,%d]" so 0 offsets don't get printed. */ - { "st%y%.v%.D%Q %0%c,[%b]%L", I(-1)+R(-1,25,1)+R(-1,21,1)+R(-1,0,511), I(2)+R(0,25,1)+R(0,21,1)+R(0,0,511) }, - { "st%y%.v%.D %c,[%b,%d]%S%L", I(-1)+R(-1,25,1)+R(-1,21,1), I(2)+R(0,25,1)+R(0,21,1) }, - { "sub%.q%.f %a,%b,%c%F%S%L", I(-1), I(10) }, - { "xor%.q%.f %a,%b,%c%F%S%L", I(-1), I(15) } -}; -const int arc_opcodes_count = sizeof (arc_opcodes) / sizeof (arc_opcodes[0]); - -const struct arc_operand_value arc_reg_names[] = -{ - /* Sort this so that the first 61 entries are sequential. - IE: For each i (i<61), arc_reg_names[i].value == i. */ - - { "r0", 0, REG }, { "r1", 1, REG }, { "r2", 2, REG }, { "r3", 3, REG }, - { "r4", 4, REG }, { "r5", 5, REG }, { "r6", 6, REG }, { "r7", 7, REG }, - { "r8", 8, REG }, { "r9", 9, REG }, { "r10", 10, REG }, { "r11", 11, REG }, - { "r12", 12, REG }, { "r13", 13, REG }, { "r14", 14, REG }, { "r15", 15, REG }, - { "r16", 16, REG }, { "r17", 17, REG }, { "r18", 18, REG }, { "r19", 19, REG }, - { "r20", 20, REG }, { "r21", 21, REG }, { "r22", 22, REG }, { "r23", 23, REG }, - { "r24", 24, REG }, { "r25", 25, REG }, { "r26", 26, REG }, { "fp", 27, REG }, - { "sp", 28, REG }, { "ilink1", 29, REG }, { "ilink2", 30, REG }, { "blink", 31, REG }, - { "r32", 32, REG }, { "r33", 33, REG }, { "r34", 34, REG }, { "r35", 35, REG }, - { "r36", 36, REG }, { "r37", 37, REG }, { "r38", 38, REG }, { "r39", 39, REG }, - { "r40", 40, REG }, { "r41", 41, REG }, { "r42", 42, REG }, { "r43", 43, REG }, - { "r44", 44, REG }, { "r45", 45, REG }, { "r46", 46, REG }, { "r47", 47, REG }, - { "r48", 48, REG }, { "r49", 49, REG }, { "r50", 50, REG }, { "r51", 51, REG }, - { "r52", 52, REG }, { "r53", 53, REG }, { "r54", 54, REG }, { "r55", 55, REG }, - { "r56", 56, REG }, { "r57", 57, REG }, { "r58", 58, REG }, { "r59", 59, REG }, - { "lp_count", 60, REG }, - - /* I'd prefer to output these as "fp" and "sp" by default, but we still need - to recognize the canonical values. */ - { "r27", 27, REG }, { "r28", 28, REG }, - - /* Someone may wish to refer to these in this way, and it's probably a - good idea to reserve them as such anyway. */ - { "r29", 29, REG }, { "r30", 30, REG }, { "r31", 31, REG }, { "r60", 60, REG }, - - /* Standard auxiliary registers. */ - { "status", 0, AUXREG }, - { "semaphore", 1, AUXREG }, - { "lp_start", 2, AUXREG }, - { "lp_end", 3, AUXREG }, - { "identity", 4, AUXREG }, - { "debug", 5, AUXREG }, -}; -const int arc_reg_names_count = sizeof (arc_reg_names) / sizeof (arc_reg_names[0]); - -/* The suffix table. - Operands with the same name must be stored together. */ - -const struct arc_operand_value arc_suffixes[] = -{ - /* Entry 0 is special, default values aren't printed by the disassembler. */ - { "", 0, -1 }, - { "al", 0, COND }, - { "ra", 0, COND }, - { "eq", 1, COND }, - { "z", 1, COND }, - { "ne", 2, COND }, - { "nz", 2, COND }, - { "p", 3, COND }, - { "pl", 3, COND }, - { "n", 4, COND }, - { "mi", 4, COND }, - { "c", 5, COND }, - { "cs", 5, COND }, - { "lo", 5, COND }, - { "nc", 6, COND }, - { "cc", 6, COND }, - { "hs", 6, COND }, - { "v", 7, COND }, - { "vs", 7, COND }, - { "nv", 8, COND }, - { "vc", 8, COND }, - { "gt", 9, COND }, - { "ge", 10, COND }, - { "lt", 11, COND }, - { "le", 12, COND }, - { "hi", 13, COND }, - { "ls", 14, COND }, - { "pnz", 15, COND }, - { "f", 1, FLAG }, - { "nd", ARC_DELAY_NONE, DELAY }, - { "d", ARC_DELAY_NORMAL, DELAY }, - { "jd", ARC_DELAY_JUMP, DELAY }, -/*{ "b", 7, SIZEEXT },*/ -/*{ "b", 5, SIZESEX },*/ - { "b", 1, SIZE1 }, - { "b", 1, SIZE10 }, - { "b", 1, SIZE22 }, -/*{ "w", 8, SIZEEXT },*/ -/*{ "w", 6, SIZESEX },*/ - { "w", 2, SIZE1 }, - { "w", 2, SIZE10 }, - { "w", 2, SIZE22 }, - { "x", 1, SIGN0 }, - { "x", 1, SIGN9 }, - { "a", 1, ADDRESS3 }, - { "a", 1, ADDRESS12 }, - { "a", 1, ADDRESS24 }, - { "di", 1, CACHEBYPASS5 }, - { "di", 1, CACHEBYPASS14 }, - { "di", 1, CACHEBYPASS26 }, -}; -const int arc_suffixes_count = sizeof (arc_suffixes) / sizeof (arc_suffixes[0]); - -/* Indexed by first letter of opcode. Points to chain of opcodes with same - first letter. */ -static struct arc_opcode *opcode_map[26 + 1]; - -/* Indexed by insn code. Points to chain of opcodes with same insn code. */ -static struct arc_opcode *icode_map[32]; - -/* Configuration flags. */ - -/* Various ARC_HAVE_XXX bits. */ -static int cpu_type; - -/* Translate a bfd_mach_arc_xxx value to a ARC_MACH_XXX value. */ - -int -arc_get_opcode_mach (bfd_mach, big_p) - int bfd_mach, big_p; -{ - static int mach_type_map[] = - { - ARC_MACH_BASE - }; - - return mach_type_map[bfd_mach] | (big_p ? ARC_MACH_BIG : 0); -} - -/* Initialize any tables that need it. - Must be called once at start up (or when first needed). - - FLAGS is a set of bits that say what version of the cpu we have, - and in particular at least (one of) ARC_MACH_XXX. */ - -void -arc_opcode_init_tables (flags) - int flags; -{ - static int init_p = 0; - - cpu_type = flags; - - /* We may be intentionally called more than once (for example gdb will call - us each time the user switches cpu). These tables only need to be init'd - once though. */ - /* ??? We can remove the need for arc_opcode_supported by taking it into - account here, but I'm not sure I want to do that yet (if ever). */ - if (!init_p) - { - register int i,n; - - memset (arc_operand_map, 0, sizeof (arc_operand_map)); - n = sizeof (arc_operands) / sizeof (arc_operands[0]); - for (i = 0; i < n; ++i) - arc_operand_map[arc_operands[i].fmt] = i; - - memset (opcode_map, 0, sizeof (opcode_map)); - memset (icode_map, 0, sizeof (icode_map)); - /* Scan the table backwards so macros appear at the front. */ - for (i = arc_opcodes_count - 1; i >= 0; --i) - { - int opcode_hash = ARC_HASH_OPCODE (arc_opcodes[i].syntax); - int icode_hash = ARC_HASH_ICODE (arc_opcodes[i].value); - - arc_opcodes[i].next_asm = opcode_map[opcode_hash]; - opcode_map[opcode_hash] = &arc_opcodes[i]; - - arc_opcodes[i].next_dis = icode_map[icode_hash]; - icode_map[icode_hash] = &arc_opcodes[i]; - } - - init_p = 1; - } -} - -/* Return non-zero if OPCODE is supported on the specified cpu. - Cpu selection is made when calling `arc_opcode_init_tables'. */ - -int -arc_opcode_supported (opcode) - const struct arc_opcode *opcode; -{ - if (ARC_OPCODE_CPU (opcode->flags) == 0) - return 1; - if (ARC_OPCODE_CPU (opcode->flags) & ARC_HAVE_CPU (cpu_type)) - return 1; - return 0; -} - -/* Return non-zero if OPVAL is supported on the specified cpu. - Cpu selection is made when calling `arc_opcode_init_tables'. */ - -int -arc_opval_supported (opval) - const struct arc_operand_value *opval; -{ - if (ARC_OPVAL_CPU (opval->flags) == 0) - return 1; - if (ARC_OPVAL_CPU (opval->flags) & ARC_HAVE_CPU (cpu_type)) - return 1; - return 0; -} - -/* Return the first insn in the chain for assembling INSN. */ - -const struct arc_opcode * -arc_opcode_lookup_asm (insn) - const char *insn; -{ - return opcode_map[ARC_HASH_OPCODE (insn)]; -} - -/* Return the first insn in the chain for disassembling INSN. */ - -const struct arc_opcode * -arc_opcode_lookup_dis (insn) - unsigned int insn; -{ - return icode_map[ARC_HASH_ICODE (insn)]; -} - -/* Nonzero if we've seen an 'f' suffix (in certain insns). */ -static int flag_p; - -/* Nonzero if we've finished processing the 'f' suffix. */ -static int flagshimm_handled_p; - -/* Nonzero if we've seen a 'q' suffix (condition code). */ -static int cond_p; - -/* Nonzero if we've inserted a shimm. */ -static int shimm_p; - -/* The value of the shimm we inserted (each insn only gets one but it can - appear multiple times. */ -static int shimm; - -/* Nonzero if we've inserted a limm (during assembly) or seen a limm - (during disassembly). */ -static int limm_p; - -/* The value of the limm we inserted. Each insn only gets one but it can - appear multiple times. */ -static long limm; - -/* Insertion functions. */ - -/* Called by the assembler before parsing an instruction. */ - -void -arc_opcode_init_insert () -{ - flag_p = 0; - flagshimm_handled_p = 0; - cond_p = 0; - shimm_p = 0; - limm_p = 0; -} - -/* Called by the assembler to see if the insn has a limm operand. - Also called by the disassembler to see if the insn contains a limm. */ - -int -arc_opcode_limm_p (limmp) - long *limmp; -{ - if (limmp) - *limmp = limm; - return limm_p; -} - -/* Insert a value into a register field. - If REG is NULL, then this is actually a constant. - - We must also handle auxiliary registers for lr/sr insns. */ - -static arc_insn -insert_reg (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - static char buf[100]; - - if (reg == NULL) - { - /* We have a constant that also requires a value stored in a register - field. Handle these by updating the register field and saving the - value for later handling by either %S (shimm) or %L (limm). */ - - /* Try to use a shimm value before a limm one. */ - if (ARC_SHIMM_CONST_P (value) - /* If we've seen a conditional suffix we have to use a limm. */ - && !cond_p - /* If we already have a shimm value that is different than ours - we have to use a limm. */ - && (!shimm_p || shimm == value)) - { - int marker = flag_p ? ARC_REG_SHIMM_UPDATE : ARC_REG_SHIMM; - flagshimm_handled_p = 1; - shimm_p = 1; - shimm = value; - insn |= marker << operand->shift; - /* insn |= value & 511; - done later */ - } - /* We have to use a limm. If we've already seen one they must match. */ - else if (!limm_p || limm == value) - { - limm_p = 1; - limm = value; - insn |= ARC_REG_LIMM << operand->shift; - /* The constant is stored later. */ - } - else - { - *errmsg = _("unable to fit different valued constants into instruction"); - } - } - else - { - /* We have to handle both normal and auxiliary registers. */ - - if (reg->type == AUXREG) - { - if (!(mods & ARC_MOD_AUXREG)) - *errmsg = _("auxiliary register not allowed here"); - else - { - insn |= ARC_REG_SHIMM << operand->shift; - insn |= reg->value << arc_operands[reg->type].shift; - } - } - else - { - /* We should never get an invalid register number here. */ - if ((unsigned int) reg->value > 60) - { - /* xgettext:c-format */ - sprintf (buf, _("invalid register number `%d'"), reg->value); - *errmsg = buf; - } - else - insn |= reg->value << operand->shift; - } - } - - return insn; -} - -/* Called when we see an 'f' flag. */ - -static arc_insn -insert_flag (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - /* We can't store anything in the insn until we've parsed the registers. - Just record the fact that we've got this flag. `insert_reg' will use it - to store the correct value (ARC_REG_SHIMM_UPDATE or bit 0x100). */ - flag_p = 1; - - return insn; -} - -/* Called after completely building an insn to ensure the 'f' flag gets set - properly. This is needed because we don't know how to set this flag until - we've parsed the registers. */ - -static arc_insn -insert_flagfinish (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - if (flag_p && !flagshimm_handled_p) - { - if (shimm_p) - abort (); - flagshimm_handled_p = 1; - insn |= (1 << operand->shift); - } - return insn; -} - -/* Called when we see a conditional flag (eg: .eq). */ - -static arc_insn -insert_cond (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - cond_p = 1; - insn |= (value & ((1 << operand->bits) - 1)) << operand->shift; - return insn; -} - -/* Used in the "j" instruction to prevent constants from being interpreted as - shimm values (which the jump insn doesn't accept). This can also be used - to force the use of limm values in other situations (eg: ld r0,[foo] uses - this). - ??? The mechanism is sound. Access to it is a bit klunky right now. */ - -static arc_insn -insert_forcelimm (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - cond_p = 1; - return insn; -} - -/* Used in ld/st insns to handle the shimm offset field. */ - -static arc_insn -insert_shimmoffset (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - long minval, maxval; - static char buf[100]; - - if (reg != NULL) - { - *errmsg = "register appears where shimm value expected"; - } - else - { - /* This is *way* more general than necessary, but maybe some day it'll - be useful. */ - if (operand->flags & ARC_OPERAND_SIGNED) - { - minval = -(1 << (operand->bits - 1)); - maxval = (1 << (operand->bits - 1)) - 1; - } - else - { - minval = 0; - maxval = (1 << operand->bits) - 1; - } - if (value < minval || value > maxval) - { - /* xgettext:c-format */ - sprintf (buf, _("value won't fit in range %ld - %ld"), - minval, maxval); - *errmsg = buf; - } - else - insn |= (value & ((1 << operand->bits) - 1)) << operand->shift; - } - return insn; -} - -/* Used in ld/st insns when the shimm offset is 0. */ - -static arc_insn -insert_shimmzero (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - shimm_p = 1; - shimm = 0; - return insn; -} - -/* Called at the end of processing normal insns (eg: add) to insert a shimm - value (if present) into the insn. */ - -static arc_insn -insert_shimmfinish (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - if (shimm_p) - insn |= (shimm & ((1 << operand->bits) - 1)) << operand->shift; - return insn; -} - -/* Called at the end of processing normal insns (eg: add) to insert a limm - value (if present) into the insn. - - Note that this function is only intended to handle instructions (with 4 byte - immediate operands). It is not intended to handle data. */ - -/* ??? Actually, there's nothing for us to do as we can't call frag_more, the - caller must do that. The extract fns take a pointer to two words. The - insert fns could be converted and then we could do something useful, but - then the reloc handlers would have to know to work on the second word of - a 2 word quantity. That's too much so we don't handle them. */ - -static arc_insn -insert_limmfinish (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - if (limm_p) - ; /* nothing to do, gas does it */ - return insn; -} - -/* Called at the end of unary operand macros to copy the B field to C. */ - -static arc_insn -insert_unopmacro (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - insn |= ((insn >> ARC_SHIFT_REGB) & ARC_MASK_REG) << operand->shift; - return insn; -} - -/* Insert a relative address for a branch insn (b, bl, or lp). */ - -static arc_insn -insert_reladdr (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - if (value & 3) - *errmsg = _("branch address not on 4 byte boundary"); - insn |= ((value >> 2) & ((1 << operand->bits) - 1)) << operand->shift; - return insn; -} - -/* Insert a limm value as a 26 bit address right shifted 2 into the insn. - - Note that this function is only intended to handle instructions (with 4 byte - immediate operands). It is not intended to handle data. */ - -/* ??? Actually, there's nothing for us to do as we can't call frag_more, the - caller must do that. The extract fns take a pointer to two words. The - insert fns could be converted and then we could do something useful, but - then the reloc handlers would have to know to work on the second word of - a 2 word quantity. That's too much so we don't handle them. */ - -static arc_insn -insert_absaddr (insn, operand, mods, reg, value, errmsg) - arc_insn insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value *reg; - long value; - const char **errmsg; -{ - if (limm_p) - ; /* nothing to do */ - return insn; -} - -/* Extraction functions. - - The suffix extraction functions' return value is redundant since it can be - obtained from (*OPVAL)->value. However, the boolean suffixes don't have - a suffix table entry for the "false" case, so values of zero must be - obtained from the return value (*OPVAL == NULL). */ - -static const struct arc_operand_value *lookup_register (int type, long regno); - -/* Called by the disassembler before printing an instruction. */ - -void -arc_opcode_init_extract () -{ - flag_p = 0; - flagshimm_handled_p = 0; - shimm_p = 0; - limm_p = 0; -} - -/* As we're extracting registers, keep an eye out for the 'f' indicator - (ARC_REG_SHIMM_UPDATE). If we find a register (not a constant marker, - like ARC_REG_SHIMM), set OPVAL so our caller will know this is a register. - - We must also handle auxiliary registers for lr/sr insns. They are just - constants with special names. */ - -static long -extract_reg (insn, operand, mods, opval, invalid) - arc_insn *insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value **opval; - int *invalid; -{ - int regno; - long value; - - /* Get the register number. */ - regno = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1); - - /* Is it a constant marker? */ - if (regno == ARC_REG_SHIMM) - { - value = insn[0] & 511; - if ((operand->flags & ARC_OPERAND_SIGNED) - && (value & 256)) - value -= 512; - flagshimm_handled_p = 1; - } - else if (regno == ARC_REG_SHIMM_UPDATE) - { - value = insn[0] & 511; - if ((operand->flags & ARC_OPERAND_SIGNED) - && (value & 256)) - value -= 512; - flag_p = 1; - flagshimm_handled_p = 1; - } - else if (regno == ARC_REG_LIMM) - { - value = insn[1]; - limm_p = 1; - } - /* It's a register, set OPVAL (that's the only way we distinguish registers - from constants here). */ - else - { - const struct arc_operand_value *reg = lookup_register (REG, regno); - - if (reg == NULL) - abort (); - if (opval != NULL) - *opval = reg; - value = regno; - } - - /* If this field takes an auxiliary register, see if it's a known one. */ - if ((mods & ARC_MOD_AUXREG) - && ARC_REG_CONSTANT_P (regno)) - { - const struct arc_operand_value *reg = lookup_register (AUXREG, value); - - /* This is really a constant, but tell the caller it has a special - name. */ - if (reg != NULL && opval != NULL) - *opval = reg; - } - - return value; -} - -/* Return the value of the "flag update" field for shimm insns. - This value is actually stored in the register field. */ - -static long -extract_flag (insn, operand, mods, opval, invalid) - arc_insn *insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value **opval; - int *invalid; -{ - int f; - const struct arc_operand_value *val; - - if (flagshimm_handled_p) - f = flag_p != 0; - else - f = (insn[0] & (1 << operand->shift)) != 0; - - /* There is no text for zero values. */ - if (f == 0) - return 0; - - val = arc_opcode_lookup_suffix (operand, 1); - if (opval != NULL && val != NULL) - *opval = val; - return val->value; -} - -/* Extract the condition code (if it exists). - If we've seen a shimm value in this insn (meaning that the insn can't have - a condition code field), then we don't store anything in OPVAL and return - zero. */ - -static long -extract_cond (insn, operand, mods, opval, invalid) - arc_insn *insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value **opval; - int *invalid; -{ - long cond; - const struct arc_operand_value *val; - - if (flagshimm_handled_p) - return 0; - - cond = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1); - val = arc_opcode_lookup_suffix (operand, cond); - - /* Ignore NULL values of `val'. Several condition code values are - reserved for extensions. */ - if (opval != NULL && val != NULL) - *opval = val; - return cond; -} - -/* Extract a branch address. - We return the value as a real address (not right shifted by 2). */ - -static long -extract_reladdr (insn, operand, mods, opval, invalid) - arc_insn *insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value **opval; - int *invalid; -{ - long addr; - - addr = (insn[0] >> operand->shift) & ((1 << operand->bits) - 1); - if ((operand->flags & ARC_OPERAND_SIGNED) - && (addr & (1 << (operand->bits - 1)))) - addr -= 1 << operand->bits; - - return addr << 2; -} - -/* The only thing this does is set the `invalid' flag if B != C. - This is needed because the "mov" macro appears before it's real insn "and" - and we don't want the disassembler to confuse them. */ - -static long -extract_unopmacro (insn, operand, mods, opval, invalid) - arc_insn *insn; - const struct arc_operand *operand; - int mods; - const struct arc_operand_value **opval; - int *invalid; -{ - /* This misses the case where B == ARC_REG_SHIMM_UPDATE && - C == ARC_REG_SHIMM (or vice versa). No big deal. Those insns will get - printed as "and"s. */ - if (((insn[0] >> ARC_SHIFT_REGB) & ARC_MASK_REG) - != ((insn[0] >> ARC_SHIFT_REGC) & ARC_MASK_REG)) - if (invalid != NULL) - *invalid = 1; - - return 0; -} - -/* Utility for the extraction functions to return the index into - `arc_suffixes'. */ - -const struct arc_operand_value * -arc_opcode_lookup_suffix (type, value) - const struct arc_operand *type; - int value; -{ - register const struct arc_operand_value *v,*end; - - /* ??? This is a little slow and can be speeded up. */ - - for (v = arc_suffixes, end = arc_suffixes + arc_suffixes_count; v < end; ++v) - if (type == &arc_operands[v->type] - && value == v->value) - return v; - return 0; -} - -static const struct arc_operand_value * -lookup_register (type, regno) - int type; - long regno; -{ - register const struct arc_operand_value *r,*end; - - if (type == REG) - return &arc_reg_names[regno]; - - /* ??? This is a little slow and can be speeded up. */ - - for (r = arc_reg_names, end = arc_reg_names + arc_reg_names_count; - r < end; ++r) - if (type == r->type && regno == r->value) - return r; - return 0; -} |