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| author | Jan Beulich <jbeulich@novell.com> | 2019-06-25 09:23:48 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2019-06-25 09:35:17 +0200 |
| commit | b8364fa775112f036a80e799b70311f69baac131 (patch) | |
| tree | d08fc20075de209c6f88d158e5d48cd13129a8b3 /gas/config | |
| parent | 2a410bd1c373d377c221476ccda2156b595e6d6b (diff) | |
| download | gdb-b8364fa775112f036a80e799b70311f69baac131.zip gdb-b8364fa775112f036a80e799b70311f69baac131.tar.gz gdb-b8364fa775112f036a80e799b70311f69baac131.tar.bz2 | |
x86-64: also optimize ANDQ with immediate fitting in 7 bits
The same reasoning applies here as did/does for immediates fitting in
31 bits.
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-i386.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index 050c872..3985756 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -3948,7 +3948,10 @@ optimize_encoding (void) && i.tm.extension_opcode == 0x4) || ((i.tm.base_opcode == 0xf6 || i.tm.base_opcode == 0xc6) - && i.tm.extension_opcode == 0x0))))) + && i.tm.extension_opcode == 0x0))) + || (fits_in_imm7 (i.op[0].imms->X_add_number) + && i.tm.base_opcode == 0x83 + && i.tm.extension_opcode == 0x4))) || (i.types[0].bitfield.qword && ((i.reg_operands == 2 && i.op[0].regs == i.op[1].regs @@ -3962,6 +3965,7 @@ optimize_encoding (void) { /* Optimize: -O: andq $imm31, %r64 -> andl $imm31, %r32 + andq $imm7, %r64 -> andl $imm7, %r32 testq $imm31, %r64 -> testl $imm31, %r32 xorq %r64, %r64 -> xorl %r32, %r32 subq %r64, %r64 -> subl %r32, %r32 |