914 lines
24 KiB
C
914 lines
24 KiB
C
/* Print SPARC instructions.
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Copyright (C) 1989, 91-93, 1995, 1996 Free Software Foundation, Inc.
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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 of the License, or
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(at your option) 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
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include "ansidecl.h"
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#include "opcode/sparc.h"
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#include "dis-asm.h"
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#include "libiberty.h"
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#include <string.h>
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/* Bitmask of v9 architectures. */
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#define MASK_V9 ((1 << SPARC_OPCODE_ARCH_V9) \
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| (1 << SPARC_OPCODE_ARCH_V9A))
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/* 1 if INSN is for v9 only. */
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#define V9_ONLY_P(insn) (! ((insn)->architecture & ~MASK_V9))
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/* 1 if INSN is for v9. */
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#define V9_P(insn) (((insn)->architecture & MASK_V9) != 0)
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/* For faster lookup, after insns are sorted they are hashed. */
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/* ??? I think there is room for even more improvement. */
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#define HASH_SIZE 256
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/* It is important that we only look at insn code bits as that is how the
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opcode table is hashed. OPCODE_BITS is a table of valid bits for each
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of the main types (0,1,2,3). */
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static int opcode_bits[4] = { 0x01c00000, 0x0, 0x01f80000, 0x01f80000 };
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#define HASH_INSN(INSN) \
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((((INSN) >> 24) & 0xc0) | (((INSN) & opcode_bits[((INSN) >> 30) & 3]) >> 19))
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struct opcode_hash {
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struct opcode_hash *next;
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struct sparc_opcode *opcode;
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};
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static struct opcode_hash *opcode_hash_table[HASH_SIZE];
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static void build_hash_table ();
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/* Sign-extend a value which is N bits long. */
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#define SEX(value, bits) \
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((((int)(value)) << ((8 * sizeof (int)) - bits)) \
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>> ((8 * sizeof (int)) - bits) )
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static char *reg_names[] =
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{ "g0", "g1", "g2", "g3", "g4", "g5", "g6", "g7",
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"o0", "o1", "o2", "o3", "o4", "o5", "sp", "o7",
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"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7",
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"i0", "i1", "i2", "i3", "i4", "i5", "fp", "i7",
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7",
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"f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15",
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"f16", "f17", "f18", "f19", "f20", "f21", "f22", "f23",
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"f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31",
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"f32", "f33", "f34", "f35", "f36", "f37", "f38", "f39",
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"f40", "f41", "f42", "f43", "f44", "f45", "f46", "f47",
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"f48", "f49", "f50", "f51", "f52", "f53", "f54", "f55",
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"f56", "f57", "f58", "f59", "f60", "f61", "f62", "f63",
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/* psr, wim, tbr, fpsr, cpsr are v8 only. */
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"y", "psr", "wim", "tbr", "pc", "npc", "fpsr", "cpsr"
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};
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#define freg_names (®_names[4 * 8])
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/* These are ordered according to there register number in
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rdpr and wrpr insns. */
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static char *v9_priv_reg_names[] =
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{
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"tpc", "tnpc", "tstate", "tt", "tick", "tba", "pstate", "tl",
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"pil", "cwp", "cansave", "canrestore", "cleanwin", "otherwin",
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"wstate", "fq"
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/* "ver" - special cased */
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};
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/* Macros used to extract instruction fields. Not all fields have
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macros defined here, only those which are actually used. */
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#define X_RD(i) (((i) >> 25) & 0x1f)
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#define X_RS1(i) (((i) >> 14) & 0x1f)
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#define X_LDST_I(i) (((i) >> 13) & 1)
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#define X_ASI(i) (((i) >> 5) & 0xff)
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#define X_RS2(i) (((i) >> 0) & 0x1f)
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#define X_IMM13(i) (((i) >> 0) & 0x1fff)
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#define X_DISP22(i) (((i) >> 0) & 0x3fffff)
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#define X_IMM22(i) X_DISP22 (i)
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#define X_DISP30(i) (((i) >> 0) & 0x3fffffff)
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/* These are for v9. */
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#define X_DISP16(i) (((((i) >> 20) & 3) << 14) | (((i) >> 0) & 0x3fff))
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#define X_DISP19(i) (((i) >> 0) & 0x7ffff)
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#define X_MEMBAR(i) ((i) & 0x7f)
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/* Here is the union which was used to extract instruction fields
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before the shift and mask macros were written.
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union sparc_insn
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{
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unsigned long int code;
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struct
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{
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unsigned int anop:2;
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#define op ldst.anop
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unsigned int anrd:5;
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#define rd ldst.anrd
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unsigned int op3:6;
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unsigned int anrs1:5;
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#define rs1 ldst.anrs1
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unsigned int i:1;
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unsigned int anasi:8;
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#define asi ldst.anasi
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unsigned int anrs2:5;
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#define rs2 ldst.anrs2
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#define shcnt rs2
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} ldst;
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struct
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{
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unsigned int anop:2, anrd:5, op3:6, anrs1:5, i:1;
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unsigned int IMM13:13;
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#define imm13 IMM13.IMM13
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} IMM13;
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struct
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{
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unsigned int anop:2;
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unsigned int a:1;
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unsigned int cond:4;
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unsigned int op2:3;
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unsigned int DISP22:22;
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#define disp22 branch.DISP22
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#define imm22 disp22
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} branch;
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struct
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{
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unsigned int anop:2;
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unsigned int a:1;
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unsigned int z:1;
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unsigned int rcond:3;
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unsigned int op2:3;
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unsigned int DISP16HI:2;
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unsigned int p:1;
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unsigned int _rs1:5;
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unsigned int DISP16LO:14;
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} branch16;
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struct
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{
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unsigned int anop:2;
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unsigned int adisp30:30;
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#define disp30 call.adisp30
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} call;
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};
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*/
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/* Nonzero if INSN is the opcode for a delayed branch. */
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static int
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is_delayed_branch (insn)
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unsigned long insn;
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{
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struct opcode_hash *op;
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for (op = opcode_hash_table[HASH_INSN (insn)]; op; op = op->next)
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{
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CONST struct sparc_opcode *opcode = op->opcode;
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if ((opcode->match & insn) == opcode->match
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&& (opcode->lose & insn) == 0)
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return (opcode->flags & F_DELAYED);
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}
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return 0;
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}
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/* extern void qsort (); */
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static int compare_opcodes ();
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/* Records current mask of SPARC_OPCODE_ARCH_FOO values, used to pass value
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to compare_opcodes. */
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static unsigned int current_arch_mask;
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static int compute_arch_mask ();
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/* Print one instruction from MEMADDR on INFO->STREAM.
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We suffix the instruction with a comment that gives the absolute
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address involved, as well as its symbolic form, if the instruction
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is preceded by a findable `sethi' and it either adds an immediate
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displacement to that register, or it is an `add' or `or' instruction
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on that register. */
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int
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print_insn_sparc (memaddr, info)
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bfd_vma memaddr;
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disassemble_info *info;
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{
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FILE *stream = info->stream;
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bfd_byte buffer[4];
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unsigned long insn;
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register unsigned int i;
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register struct opcode_hash *op;
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/* Nonzero of opcode table has been initialized. */
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static int opcodes_initialized = 0;
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/* bfd mach number of last call. */
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static unsigned long current_mach = 0;
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if (!opcodes_initialized
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|| info->mach != current_mach)
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{
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current_arch_mask = compute_arch_mask (info->mach);
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qsort ((char *) sparc_opcodes, sparc_num_opcodes,
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sizeof (sparc_opcodes[0]), compare_opcodes);
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build_hash_table (sparc_opcodes, opcode_hash_table, sparc_num_opcodes);
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current_mach = info->mach;
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opcodes_initialized = 1;
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}
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{
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int status =
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(*info->read_memory_func) (memaddr, buffer, sizeof (buffer), info);
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if (status != 0)
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{
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(*info->memory_error_func) (status, memaddr, info);
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return -1;
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}
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}
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insn = bfd_getb32 (buffer);
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info->insn_info_valid = 1; /* We do return this info */
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info->insn_type = dis_nonbranch; /* Assume non branch insn */
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info->branch_delay_insns = 0; /* Assume no delay */
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info->target = 0; /* Assume no target known */
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for (op = opcode_hash_table[HASH_INSN (insn)]; op; op = op->next)
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{
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CONST struct sparc_opcode *opcode = op->opcode;
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/* If the insn isn't supported by the current architecture, skip it. */
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if (! (opcode->architecture & current_arch_mask))
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continue;
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if ((opcode->match & insn) == opcode->match
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&& (opcode->lose & insn) == 0)
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{
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/* Nonzero means that we have found an instruction which has
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the effect of adding or or'ing the imm13 field to rs1. */
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int imm_added_to_rs1 = 0;
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/* Nonzero means that we have found a plus sign in the args
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field of the opcode table. */
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int found_plus = 0;
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/* Nonzero means we have an annulled branch. */
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int is_annulled = 0;
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/* Do we have an `add' or `or' instruction where rs1 is the same
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as rsd, and which has the i bit set? */
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if ((opcode->match == 0x80102000 || opcode->match == 0x80002000)
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/* (or) (add) */
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&& X_RS1 (insn) == X_RD (insn))
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imm_added_to_rs1 = 1;
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if (X_RS1 (insn) != X_RD (insn)
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&& strchr (opcode->args, 'r') != 0)
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/* Can't do simple format if source and dest are different. */
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continue;
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if (X_RS2 (insn) != X_RD (insn)
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&& strchr (opcode->args, 'O') != 0)
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/* Can't do simple format if source and dest are different. */
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continue;
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(*info->fprintf_func) (stream, opcode->name);
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{
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register CONST char *s;
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if (opcode->args[0] != ',')
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(*info->fprintf_func) (stream, " ");
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for (s = opcode->args; *s != '\0'; ++s)
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{
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while (*s == ',')
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{
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(*info->fprintf_func) (stream, ",");
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++s;
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switch (*s) {
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case 'a':
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(*info->fprintf_func) (stream, "a");
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is_annulled = 1;
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++s;
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continue;
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case 'N':
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(*info->fprintf_func) (stream, "pn");
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++s;
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continue;
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case 'T':
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(*info->fprintf_func) (stream, "pt");
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++s;
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continue;
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default:
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break;
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} /* switch on arg */
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} /* while there are comma started args */
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(*info->fprintf_func) (stream, " ");
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switch (*s)
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{
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case '+':
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found_plus = 1;
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/* note fall-through */
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default:
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(*info->fprintf_func) (stream, "%c", *s);
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break;
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case '#':
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(*info->fprintf_func) (stream, "0");
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break;
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#define reg(n) (*info->fprintf_func) (stream, "%%%s", reg_names[n])
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case '1':
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case 'r':
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reg (X_RS1 (insn));
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break;
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case '2':
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case 'O':
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reg (X_RS2 (insn));
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break;
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case 'd':
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reg (X_RD (insn));
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break;
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#undef reg
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#define freg(n) (*info->fprintf_func) (stream, "%%%s", freg_names[n])
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#define fregx(n) (*info->fprintf_func) (stream, "%%%s", freg_names[((n) & ~1) | (((n) & 1) << 5)])
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case 'e':
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freg (X_RS1 (insn));
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break;
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case 'v': /* double/even */
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case 'V': /* quad/multiple of 4 */
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fregx (X_RS1 (insn));
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break;
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case 'f':
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freg (X_RS2 (insn));
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break;
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case 'B': /* double/even */
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case 'R': /* quad/multiple of 4 */
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fregx (X_RS2 (insn));
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break;
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case 'g':
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freg (X_RD (insn));
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break;
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case 'H': /* double/even */
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case 'J': /* quad/multiple of 4 */
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fregx (X_RD (insn));
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break;
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#undef freg
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#undef fregx
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#define creg(n) (*info->fprintf_func) (stream, "%%c%u", (unsigned int) (n))
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case 'b':
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creg (X_RS1 (insn));
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break;
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case 'c':
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creg (X_RS2 (insn));
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break;
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case 'D':
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creg (X_RD (insn));
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break;
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#undef creg
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case 'h':
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(*info->fprintf_func) (stream, "%%hi(%#x)",
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(0xFFFFFFFF
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& ((int) X_IMM22 (insn) << 10)));
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break;
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case 'i':
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{
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int imm = SEX (X_IMM13 (insn), 13);
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/* Check to see whether we have a 1+i, and take
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note of that fact.
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Note: because of the way we sort the table,
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we will be matching 1+i rather than i+1,
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so it is OK to assume that i is after +,
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not before it. */
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if (found_plus)
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imm_added_to_rs1 = 1;
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if (imm <= 9)
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(*info->fprintf_func) (stream, "%d", imm);
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else
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(*info->fprintf_func) (stream, "%#x", imm);
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}
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break;
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case 'I': /* 11 bit immediate. */
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case 'j': /* 10 bit immediate. */
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{
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int imm;
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if (*s == 'I')
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imm = SEX (X_IMM13 (insn), 11);
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else
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imm = SEX (X_IMM13 (insn), 10);
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/* Check to see whether we have a 1+i, and take
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note of that fact.
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Note: because of the way we sort the table,
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we will be matching 1+i rather than i+1,
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so it is OK to assume that i is after +,
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not before it. */
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if (found_plus)
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imm_added_to_rs1 = 1;
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if (imm <= 9)
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(info->fprintf_func) (stream, "%d", imm);
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else
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(info->fprintf_func) (stream, "%#x", (unsigned) imm);
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}
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break;
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case 'K':
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{
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int mask = X_MEMBAR (insn);
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int bit = 0x40, printed_one = 0;
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char *name;
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if (mask == 0)
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(info->fprintf_func) (stream, "0");
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else
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while (bit)
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{
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if (mask & bit)
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{
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if (printed_one)
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(info->fprintf_func) (stream, "|");
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name = sparc_decode_membar (bit);
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(info->fprintf_func) (stream, "%s", name);
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printed_one = 1;
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}
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bit >>= 1;
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}
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break;
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}
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case 'k':
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info->target = memaddr + SEX (X_DISP16 (insn), 16) * 4;
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(*info->print_address_func) (info->target, info);
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break;
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case 'G':
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info->target = memaddr + SEX (X_DISP19 (insn), 19) * 4;
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(*info->print_address_func) (info->target, info);
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break;
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case '6':
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case '7':
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case '8':
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case '9':
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(*info->fprintf_func) (stream, "%%fcc%c", *s - '6' + '0');
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break;
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case 'z':
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(*info->fprintf_func) (stream, "%%icc");
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break;
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case 'Z':
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(*info->fprintf_func) (stream, "%%xcc");
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break;
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case 'E':
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(*info->fprintf_func) (stream, "%%ccr");
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break;
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case 's':
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(*info->fprintf_func) (stream, "%%fprs");
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break;
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case 'o':
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(*info->fprintf_func) (stream, "%%asi");
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break;
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|
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case 'W':
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(*info->fprintf_func) (stream, "%%tick");
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break;
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|
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case 'P':
|
|
(*info->fprintf_func) (stream, "%%pc");
|
|
break;
|
|
|
|
case '?':
|
|
if (X_RS1 (insn) == 31)
|
|
(*info->fprintf_func) (stream, "%%ver");
|
|
else if ((unsigned) X_RS1 (insn) < 16)
|
|
(*info->fprintf_func) (stream, "%%%s",
|
|
v9_priv_reg_names[X_RS1 (insn)]);
|
|
else
|
|
(*info->fprintf_func) (stream, "%%reserved");
|
|
break;
|
|
|
|
case '!':
|
|
if ((unsigned) X_RD (insn) < 15)
|
|
(*info->fprintf_func) (stream, "%%%s",
|
|
v9_priv_reg_names[X_RD (insn)]);
|
|
else
|
|
(*info->fprintf_func) (stream, "%%reserved");
|
|
break;
|
|
|
|
case '*':
|
|
{
|
|
char *name = sparc_decode_prefetch (X_RD (insn));
|
|
|
|
if (name)
|
|
(*info->fprintf_func) (stream, "%s", name);
|
|
else
|
|
(*info->fprintf_func) (stream, "%d", X_RD (insn));
|
|
break;
|
|
}
|
|
|
|
case 'M':
|
|
(*info->fprintf_func) (stream, "%%asr%d", X_RS1 (insn));
|
|
break;
|
|
|
|
case 'm':
|
|
(*info->fprintf_func) (stream, "%%asr%d", X_RD (insn));
|
|
break;
|
|
|
|
case 'L':
|
|
info->target = memaddr + SEX (X_DISP30 (insn), 30) * 4;
|
|
(*info->print_address_func) (info->target, info);
|
|
break;
|
|
|
|
case 'n':
|
|
(*info->fprintf_func)
|
|
(stream, "%#x", SEX (X_DISP22 (insn), 22));
|
|
break;
|
|
|
|
case 'l':
|
|
info->target = memaddr + SEX (X_DISP22 (insn), 22) * 4;
|
|
(*info->print_address_func) (info->target, info);
|
|
break;
|
|
|
|
case 'A':
|
|
{
|
|
char *name = sparc_decode_asi (X_ASI (insn));
|
|
|
|
if (name)
|
|
(*info->fprintf_func) (stream, "%s", name);
|
|
else
|
|
(*info->fprintf_func) (stream, "(%d)", X_ASI (insn));
|
|
break;
|
|
}
|
|
|
|
case 'C':
|
|
(*info->fprintf_func) (stream, "%%csr");
|
|
break;
|
|
|
|
case 'F':
|
|
(*info->fprintf_func) (stream, "%%fsr");
|
|
break;
|
|
|
|
case 'p':
|
|
(*info->fprintf_func) (stream, "%%psr");
|
|
break;
|
|
|
|
case 'q':
|
|
(*info->fprintf_func) (stream, "%%fq");
|
|
break;
|
|
|
|
case 'Q':
|
|
(*info->fprintf_func) (stream, "%%cq");
|
|
break;
|
|
|
|
case 't':
|
|
(*info->fprintf_func) (stream, "%%tbr");
|
|
break;
|
|
|
|
case 'w':
|
|
(*info->fprintf_func) (stream, "%%wim");
|
|
break;
|
|
|
|
case 'x':
|
|
(*info->fprintf_func) (stream, "%d",
|
|
((X_LDST_I (insn) << 8)
|
|
+ X_ASI (insn)));
|
|
break;
|
|
|
|
case 'y':
|
|
(*info->fprintf_func) (stream, "%%y");
|
|
break;
|
|
|
|
case 'u':
|
|
case 'U':
|
|
{
|
|
int val = *s == 'U' ? X_RS1 (insn) : X_RD (insn);
|
|
char *name = sparc_decode_sparclet_cpreg (val);
|
|
|
|
if (name)
|
|
(*info->fprintf_func) (stream, "%s", name);
|
|
else
|
|
(*info->fprintf_func) (stream, "%%cpreg(%d)", val);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
/* If we are adding or or'ing something to rs1, then
|
|
check to see whether the previous instruction was
|
|
a sethi to the same register as in the sethi.
|
|
If so, attempt to print the result of the add or
|
|
or (in this context add and or do the same thing)
|
|
and its symbolic value. */
|
|
if (imm_added_to_rs1)
|
|
{
|
|
unsigned long prev_insn;
|
|
int errcode;
|
|
|
|
errcode =
|
|
(*info->read_memory_func)
|
|
(memaddr - 4, buffer, sizeof (buffer), info);
|
|
prev_insn = bfd_getb32 (buffer);
|
|
|
|
if (errcode == 0)
|
|
{
|
|
/* If it is a delayed branch, we need to look at the
|
|
instruction before the delayed branch. This handles
|
|
sequences such as
|
|
|
|
sethi %o1, %hi(_foo), %o1
|
|
call _printf
|
|
or %o1, %lo(_foo), %o1
|
|
*/
|
|
|
|
if (is_delayed_branch (prev_insn))
|
|
{
|
|
errcode = (*info->read_memory_func)
|
|
(memaddr - 8, buffer, sizeof (buffer), info);
|
|
prev_insn = bfd_getb32 (buffer);
|
|
}
|
|
}
|
|
|
|
/* If there was a problem reading memory, then assume
|
|
the previous instruction was not sethi. */
|
|
if (errcode == 0)
|
|
{
|
|
/* Is it sethi to the same register? */
|
|
if ((prev_insn & 0xc1c00000) == 0x01000000
|
|
&& X_RD (prev_insn) == X_RS1 (insn))
|
|
{
|
|
(*info->fprintf_func) (stream, "\t! ");
|
|
info->target =
|
|
(0xFFFFFFFF & (int) X_IMM22 (prev_insn) << 10)
|
|
| SEX (X_IMM13 (insn), 13);
|
|
(*info->print_address_func) (info->target, info);
|
|
info->insn_type = dis_dref;
|
|
info->data_size = 4; /* FIXME!!! */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (opcode->flags & (F_UNBR|F_CONDBR|F_JSR))
|
|
{
|
|
/* FIXME -- check is_annulled flag */
|
|
if (opcode->flags & F_UNBR)
|
|
info->insn_type = dis_branch;
|
|
if (opcode->flags & F_CONDBR)
|
|
info->insn_type = dis_condbranch;
|
|
if (opcode->flags & F_JSR)
|
|
info->insn_type = dis_jsr;
|
|
if (opcode->flags & F_DELAYED)
|
|
info->branch_delay_insns = 1;
|
|
}
|
|
|
|
return sizeof (buffer);
|
|
}
|
|
}
|
|
|
|
info->insn_type = dis_noninsn; /* Mark as non-valid instruction */
|
|
(*info->fprintf_func) (stream, "unknown");
|
|
return sizeof (buffer);
|
|
}
|
|
|
|
/* Given BFD mach number, return a mask of SPARC_OPCODE_ARCH_FOO values. */
|
|
|
|
static int
|
|
compute_arch_mask (mach)
|
|
unsigned long mach;
|
|
{
|
|
switch (mach)
|
|
{
|
|
case 0 :
|
|
case bfd_mach_sparc :
|
|
return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V8);
|
|
case bfd_mach_sparc_sparclet :
|
|
return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_SPARCLET);
|
|
case bfd_mach_sparc_sparclite :
|
|
/* sparclites insns are recognized by default (because that's how
|
|
they've always been treated, for better or worse). Kludge this by
|
|
indicating generic v8 is also selected. */
|
|
return (SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_SPARCLITE)
|
|
| SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V8));
|
|
case bfd_mach_sparc_v8plus :
|
|
case bfd_mach_sparc_v9 :
|
|
return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V9);
|
|
case bfd_mach_sparc_v8plusa :
|
|
case bfd_mach_sparc_v9a :
|
|
return SPARC_OPCODE_ARCH_MASK (SPARC_OPCODE_ARCH_V9A);
|
|
}
|
|
abort ();
|
|
}
|
|
|
|
/* Compare opcodes A and B. */
|
|
|
|
static int
|
|
compare_opcodes (a, b)
|
|
char *a, *b;
|
|
{
|
|
struct sparc_opcode *op0 = (struct sparc_opcode *) a;
|
|
struct sparc_opcode *op1 = (struct sparc_opcode *) b;
|
|
unsigned long int match0 = op0->match, match1 = op1->match;
|
|
unsigned long int lose0 = op0->lose, lose1 = op1->lose;
|
|
register unsigned int i;
|
|
|
|
/* If one (and only one) insn isn't supported by the current architecture,
|
|
prefer the one that is. If neither are supported, but they're both for
|
|
the same architecture, continue processing. Otherwise (both unsupported
|
|
and for different architectures), prefer lower numbered arch's (fudged
|
|
by comparing the bitmasks). */
|
|
if (op0->architecture & current_arch_mask)
|
|
{
|
|
if (! (op1->architecture & current_arch_mask))
|
|
return -1;
|
|
}
|
|
else
|
|
{
|
|
if (op1->architecture & current_arch_mask)
|
|
return 1;
|
|
else if (op0->architecture != op1->architecture)
|
|
return op0->architecture - op1->architecture;
|
|
}
|
|
|
|
/* If a bit is set in both match and lose, there is something
|
|
wrong with the opcode table. */
|
|
if (match0 & lose0)
|
|
{
|
|
fprintf (stderr, "Internal error: bad sparc-opcode.h: \"%s\", %#.8lx, %#.8lx\n",
|
|
op0->name, match0, lose0);
|
|
op0->lose &= ~op0->match;
|
|
lose0 = op0->lose;
|
|
}
|
|
|
|
if (match1 & lose1)
|
|
{
|
|
fprintf (stderr, "Internal error: bad sparc-opcode.h: \"%s\", %#.8lx, %#.8lx\n",
|
|
op1->name, match1, lose1);
|
|
op1->lose &= ~op1->match;
|
|
lose1 = op1->lose;
|
|
}
|
|
|
|
/* Because the bits that are variable in one opcode are constant in
|
|
another, it is important to order the opcodes in the right order. */
|
|
for (i = 0; i < 32; ++i)
|
|
{
|
|
unsigned long int x = 1 << i;
|
|
int x0 = (match0 & x) != 0;
|
|
int x1 = (match1 & x) != 0;
|
|
|
|
if (x0 != x1)
|
|
return x1 - x0;
|
|
}
|
|
|
|
for (i = 0; i < 32; ++i)
|
|
{
|
|
unsigned long int x = 1 << i;
|
|
int x0 = (lose0 & x) != 0;
|
|
int x1 = (lose1 & x) != 0;
|
|
|
|
if (x0 != x1)
|
|
return x1 - x0;
|
|
}
|
|
|
|
/* They are functionally equal. So as long as the opcode table is
|
|
valid, we can put whichever one first we want, on aesthetic grounds. */
|
|
|
|
/* Our first aesthetic ground is that aliases defer to real insns. */
|
|
{
|
|
int alias_diff = (op0->flags & F_ALIAS) - (op1->flags & F_ALIAS);
|
|
if (alias_diff != 0)
|
|
/* Put the one that isn't an alias first. */
|
|
return alias_diff;
|
|
}
|
|
|
|
/* Except for aliases, two "identical" instructions had
|
|
better have the same opcode. This is a sanity check on the table. */
|
|
i = strcmp (op0->name, op1->name);
|
|
if (i)
|
|
{
|
|
if (op0->flags & F_ALIAS) /* If they're both aliases, be arbitrary. */
|
|
return i;
|
|
else
|
|
fprintf (stderr,
|
|
"Internal error: bad sparc-opcode.h: \"%s\" == \"%s\"\n",
|
|
op0->name, op1->name);
|
|
}
|
|
|
|
/* Fewer arguments are preferred. */
|
|
{
|
|
int length_diff = strlen (op0->args) - strlen (op1->args);
|
|
if (length_diff != 0)
|
|
/* Put the one with fewer arguments first. */
|
|
return length_diff;
|
|
}
|
|
|
|
/* Put 1+i before i+1. */
|
|
{
|
|
char *p0 = (char *) strchr(op0->args, '+');
|
|
char *p1 = (char *) strchr(op1->args, '+');
|
|
|
|
if (p0 && p1)
|
|
{
|
|
/* There is a plus in both operands. Note that a plus
|
|
sign cannot be the first character in args,
|
|
so the following [-1]'s are valid. */
|
|
if (p0[-1] == 'i' && p1[1] == 'i')
|
|
/* op0 is i+1 and op1 is 1+i, so op1 goes first. */
|
|
return 1;
|
|
if (p0[1] == 'i' && p1[-1] == 'i')
|
|
/* op0 is 1+i and op1 is i+1, so op0 goes first. */
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* Put 1,i before i,1. */
|
|
{
|
|
int i0 = strncmp (op0->args, "i,1", 3) == 0;
|
|
int i1 = strncmp (op1->args, "i,1", 3) == 0;
|
|
|
|
if (i0 ^ i1)
|
|
return i0 - i1;
|
|
}
|
|
|
|
/* They are, as far as we can tell, identical.
|
|
Since qsort may have rearranged the table partially, there is
|
|
no way to tell which one was first in the opcode table as
|
|
written, so just say there are equal. */
|
|
return 0;
|
|
}
|
|
|
|
/* Build a hash table from the opcode table. */
|
|
|
|
static void
|
|
build_hash_table (table, hash_table, num_opcodes)
|
|
struct sparc_opcode *table;
|
|
struct opcode_hash **hash_table;
|
|
int num_opcodes;
|
|
{
|
|
register int i;
|
|
int hash_count[HASH_SIZE];
|
|
static struct opcode_hash *hash_buf = NULL;
|
|
|
|
/* Start at the end of the table and work backwards so that each
|
|
chain is sorted. */
|
|
|
|
memset (hash_table, 0, HASH_SIZE * sizeof (hash_table[0]));
|
|
memset (hash_count, 0, HASH_SIZE * sizeof (hash_count[0]));
|
|
if (hash_buf != NULL)
|
|
free (hash_buf);
|
|
hash_buf = (struct opcode_hash *) xmalloc (sizeof (struct opcode_hash) * num_opcodes);
|
|
for (i = num_opcodes - 1; i >= 0; --i)
|
|
{
|
|
register int hash = HASH_INSN (sparc_opcodes[i].match);
|
|
register struct opcode_hash *h = &hash_buf[i];
|
|
h->next = hash_table[hash];
|
|
h->opcode = &sparc_opcodes[i];
|
|
hash_table[hash] = h;
|
|
++hash_count[hash];
|
|
}
|
|
|
|
#if 0 /* for debugging */
|
|
{
|
|
int min_count = num_opcodes, max_count = 0;
|
|
int total;
|
|
|
|
for (i = 0; i < HASH_SIZE; ++i)
|
|
{
|
|
if (hash_count[i] < min_count)
|
|
min_count = hash_count[i];
|
|
if (hash_count[i] > max_count)
|
|
max_count = hash_count[i];
|
|
total += hash_count[i];
|
|
}
|
|
|
|
printf ("Opcode hash table stats: min %d, max %d, ave %f\n",
|
|
min_count, max_count, (double) total / HASH_SIZE);
|
|
}
|
|
#endif
|
|
}
|