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| author | Jan Beulich <jbeulich@suse.com> | 2021-05-07 12:02:07 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2021-05-07 12:02:07 +0200 |
| commit | 87ed972dc348404a4f8b820efa8dc79aaaa966f2 (patch) | |
| tree | 73dc56686690b54f5fa89e068dcd9507bfa8a683 /gas | |
| parent | d820a652a6d3ae3793207016c0c8cc78451eabd0 (diff) | |
| download | gdb-87ed972dc348404a4f8b820efa8dc79aaaa966f2.zip gdb-87ed972dc348404a4f8b820efa8dc79aaaa966f2.tar.gz gdb-87ed972dc348404a4f8b820efa8dc79aaaa966f2.tar.bz2 | |
x86: minor improvements to optimize_imm()
- Drop a pointless & where just before it was checked that the
respective bits are clear already anyway.
- Avoid a not really necessary operand_type_set() and a redundant
operand_type_or() / operand_type_and() pair.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/ChangeLog | 5 | ||||
| -rw-r--r-- | gas/config/tc-i386.c | 14 |
2 files changed, 11 insertions, 8 deletions
diff --git a/gas/ChangeLog b/gas/ChangeLog index 790951a..ad82f9b 100644 --- a/gas/ChangeLog +++ b/gas/ChangeLog @@ -1,3 +1,8 @@ +2021-05-07 Jan Beulich <jbeulich@suse.com> + + * config/tc-i386.c (optimize_imm): Drop redundant masking. + Re-arrange operand type accumulation. + 2021-05-06 Stafford Horne <shorne@gmail.com> PR 21464 diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 5d5897f..c09d63f 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -5791,8 +5791,8 @@ optimize_imm (void) if ((i.types[op].bitfield.imm16) && (i.op[op].imms->X_add_number & ~(offsetT) 0xffff) == 0) { - i.op[op].imms->X_add_number = - (((i.op[op].imms->X_add_number & 0xffff) ^ 0x8000) - 0x8000); + i.op[op].imms->X_add_number = ((i.op[op].imms->X_add_number + ^ 0x8000) - 0x8000); } #ifdef BFD64 /* Store 32-bit immediate in 64-bit for 64-bit BFD. */ @@ -5826,17 +5826,15 @@ optimize_imm (void) than those matching the insn suffix. */ { i386_operand_type mask, allowed; - const insn_template *t; + const insn_template *t = current_templates->start; operand_type_set (&mask, 0); - operand_type_set (&allowed, 0); + allowed = t->operand_types[op]; - for (t = current_templates->start; - t < current_templates->end; - ++t) + while (++t < current_templates->end) { - allowed = operand_type_or (allowed, t->operand_types[op]); allowed = operand_type_and (allowed, anyimm); + allowed = operand_type_or (allowed, t->operand_types[op]); } switch (guess_suffix) { |