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x86: instantiate i386_{op,reg}tab[] in gas instead of in libopcodes

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Unlike many other architectures, x86 does not share an opcode table
between assembly and disassembly. Any consumer of libopcodes would only
ever access one of the two. Since gas is the only consumer of the
assembly data, move it there. While doing so mark respective entities
"static" in i386-gen (we may want to do away with i386_regtab_size
altogether).

This also shrinks the number of relocations to be processed for
libopcodes.so by about 30%.
This commit is contained in:
Jan Beulich
2022-12-12 08:46:47 +01:00
parent b35abeab8d
commit 99f0fb12d5
5 changed files with 9 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
gas/config/tc-i386.c
View File

@ -2961,6 +2961,8 @@ i386_mach (void)
as_fatal (_("unknown architecture"));
}
#include "opcodes/i386-tbl.h"
void
md_begin (void)
{

6
opcodes/i386-gen.c
View File

@ -1718,7 +1718,7 @@ process_i386_opcodes (FILE *table)
xcalloc, free);
fprintf (table, "\n/* i386 opcode table. */\n\n");
fprintf (table, "const insn_template i386_optab[] =\n{\n");
fprintf (table, "static const insn_template i386_optab[] =\n{\n");
/* Put everything on opcode array. */
while (!feof (fp))
@ -1848,7 +1848,7 @@ process_i386_registers (FILE *table)
xstrerror (errno));
fprintf (table, "\n/* i386 register table. */\n\n");
fprintf (table, "const reg_entry i386_regtab[] =\n{\n");
fprintf (table, "static const reg_entry i386_regtab[] =\n{\n");
while (!feof (fp))
{
@ -1911,7 +1911,7 @@ process_i386_registers (FILE *table)
fprintf (table, "};\n");
fprintf (table, "\nconst unsigned int i386_regtab_size = ARRAY_SIZE (i386_regtab);\n");
fprintf (table, "\nstatic const unsigned int i386_regtab_size = ARRAY_SIZE (i386_regtab);\n");
}
static void

1
opcodes/i386-opc.c
View File

@ -21,4 +21,3 @@
#include "sysdep.h"
#include "libiberty.h"
#include "i386-opc.h"
#include "i386-tbl.h"

7
opcodes/i386-opc.h
View File

@ -918,7 +918,7 @@ typedef union i386_operand_type
typedef struct insn_template
{
/* instruction name sans width suffix ("mov" for movl insns) */
char *name;
const char *name;
/* Bitfield arrangement is such that individual fields can be easily
extracted (in native builds at least) - either by at most a masking
@ -984,8 +984,6 @@ typedef struct insn_template
}
insn_template;
extern const insn_template i386_optab[];
/* these are for register name --> number & type hash lookup */
typedef struct
{
@ -1005,6 +1003,3 @@ typedef struct
#define Dw2Inval (-1)
}
reg_entry;
extern const reg_entry i386_regtab[];
extern const unsigned int i386_regtab_size;

6
opcodes/i386-tbl.h
View File

@ -20,7 +20,7 @@
/* i386 opcode table. */
const insn_template i386_optab[] =
static const insn_template i386_optab[] =
{
{ "mov", 0xa0, 2, None,
{ 1, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0,
@ -59853,7 +59853,7 @@ const insn_template i386_optab[] =
/* i386 register table. */
const reg_entry i386_regtab[] =
static const reg_entry i386_regtab[] =
{
{ "al",
{ { 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
@ -61009,4 +61009,4 @@ const reg_entry i386_regtab[] =
0, 0, { 39, 64 } },
};
const unsigned int i386_regtab_size = ARRAY_SIZE (i386_regtab);
static const unsigned int i386_regtab_size = ARRAY_SIZE (i386_regtab);