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| author | Jan Beulich <jbeulich@suse.com> | 2023-01-20 10:15:48 +0100 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2023-01-20 10:15:48 +0100 |
| commit | 5c1392029158fa5b2946953394e566c83a0602e1 (patch) | |
| tree | 5f79804018ce30301d631fb85a437ff91d26e930 /opcodes/i386-opc.h | |
| parent | 76d3f746c538af9204bbf5d7f90188a65048c0da (diff) | |
| download | binutils-gdb-5c1392029158fa5b2946953394e566c83a0602e1.tar.gz | |
x86: move insn mnemonics to a separate table
Using full pointers to reference the insn mnemonic strings is not very
efficient. With overall string size presently just slightly over 20k,
even a 16-bit value would suffice. Use "unsigned int" for now, as
there's no good use we could presently make of the otherwise saved 16
bits.
For 64-bit builds this reduces table size by 6.25% (prior to the recent
ISA extension additions it would have been 12.5%), with a similar effect
on cache occupation of table entries accessed. For PIE builds of gas
this also reduces the number of base relocations quite a bit (obviously
independent of bitness).
Diffstat (limited to 'opcodes/i386-opc.h')
| -rw-r--r-- | opcodes/i386-opc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/opcodes/i386-opc.h b/opcodes/i386-opc.h index 3d4fa54843f..ebedb3e6f5f 100644 --- a/opcodes/i386-opc.h +++ b/opcodes/i386-opc.h @@ -918,7 +918,7 @@ typedef union i386_operand_type typedef struct insn_template { /* instruction name sans width suffix ("mov" for movl insns) */ - const char *name; + unsigned int mnem_off; /* Bitfield arrangement is such that individual fields can be easily extracted (in native builds at least) - either by at most a masking |