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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 /gas | |
| parent | 76d3f746c538af9204bbf5d7f90188a65048c0da (diff) | |
| download | gdb-5c1392029158fa5b2946953394e566c83a0602e1.zip gdb-5c1392029158fa5b2946953394e566c83a0602e1.tar.gz gdb-5c1392029158fa5b2946953394e566c83a0602e1.tar.bz2 | |
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 'gas')
| -rw-r--r-- | gas/Makefile.am | 2 | ||||
| -rw-r--r-- | gas/Makefile.in | 2 | ||||
| -rw-r--r-- | gas/config/tc-i386.c | 3 |
3 files changed, 4 insertions, 3 deletions
diff --git a/gas/Makefile.am b/gas/Makefile.am index 03f51c7..f8770e8 100644 --- a/gas/Makefile.am +++ b/gas/Makefile.am @@ -453,7 +453,7 @@ i386_tbl_deps = $(srcdir)/../opcodes/i386-opc.tbl \ $(srcdir)/../opcodes/i386-reg.tbl \ $(srcdir)/../opcodes/i386-gen.c $(srcdir)/../opcodes/i386-opc.h -$(srcdir)/../opcodes/i386%init.h $(srcdir)/../opcodes/i386%tbl.h: @MAINT@ $(i386_tbl_deps) +$(srcdir)/../opcodes/i386%init.h $(srcdir)/../opcodes/i386%tbl.h $(srcdir)/../opcodes/i386%mnem.h: @MAINT@ $(i386_tbl_deps) @echo '"$@" is outdated wrt "$?"' >&2 @echo 'Please rebuild from the top level or in $(CURDIR)/../opcodes/' >&2 @false diff --git a/gas/Makefile.in b/gas/Makefile.in index c86d333..d8d4953 100644 --- a/gas/Makefile.in +++ b/gas/Makefile.in @@ -2070,7 +2070,7 @@ development.exp: $(BFDDIR)/development.sh config/tc-i386.o: $(srcdir)/../opcodes/i386-init.h $(srcdir)/../opcodes/i386-tbl.h -$(srcdir)/../opcodes/i386%init.h $(srcdir)/../opcodes/i386%tbl.h: @MAINT@ $(i386_tbl_deps) +$(srcdir)/../opcodes/i386%init.h $(srcdir)/../opcodes/i386%tbl.h $(srcdir)/../opcodes/i386%mnem.h: @MAINT@ $(i386_tbl_deps) @echo '"$@" is outdated wrt "$?"' >&2 @echo 'Please rebuild from the top level or in $(CURDIR)/../opcodes/' >&2 @false diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index e755869..6929ffa 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -34,6 +34,7 @@ #include "sframe.h" #include "elf/x86-64.h" #include "opcodes/i386-init.h" +#include "opcodes/i386-mnem.h" #include <limits.h> #ifndef INFER_ADDR_PREFIX @@ -2428,7 +2429,7 @@ offset_in_range (offsetT val, int size) static INLINE const char *insn_name (const insn_template *t) { - return t->name; + return &i386_mnemonics[t->mnem_off]; } enum PREFIX_GROUP |