Commit Graph

32 Commits

Author SHA1 Message Date
Bill Wendling
d336de318e As Dan pointed out, movzbl, movsbl, and friends are nicer than their alias
(movzx/movsx) because they give more information. Revert that part of the patch.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129498 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14 01:46:37 +00:00
Bill Wendling
c6df9883da Have the X86 back-end emit the alias instead of what's being aliased. In most
cases, it's much nicer and more informative reading the alias.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129497 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-14 01:11:51 +00:00
Chris Lattner
15f8951799 fix rdar://8735979 - "int 3" doesn't match to "int3". Unfortunately,
InstAlias doesn't allow matching immediate operands, so we have to write
C++ code to do this.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129223 91177308-0d34-0410-b5e6-96231b3b80d8
2011-04-09 19:41:05 +00:00
Joerg Sonnenberger
96622aa063 Support explicit argument forms for the X86 string instructions.
For now, only the default segments are supported.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127875 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-18 11:59:40 +00:00
Eli Friedman
86d822df6d Followup to r126970: add 64-bit encoding tests for str with reg operand.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126987 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-04 04:06:47 +00:00
Joerg Sonnenberger
00743c2218 Use the same (%dx) hack for in[bwl] as for out[bwl].
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126244 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-22 20:40:09 +00:00
Joerg Sonnenberger
d86f482e4a Recognize loopz and loopnz as aliases for loope and loopne.
From Dimitry Andric.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126168 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-22 00:43:07 +00:00
Rafael Espindola
87ca0e077d Implement xgetbv and xsetbv.
Patch by Jai Menon.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126165 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-22 00:35:18 +00:00
Chris Lattner
824a9076ea implement PR9264: disambiguating 'bt mem, imm' as a btl.
This is reasonable to do since all bt-mem forms do the
same thing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126047 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-19 21:06:36 +00:00
Joerg Sonnenberger
5ad596f9d2 Recognize monitor/mwait with explicit register arguments
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125805 91177308-0d34-0410-b5e6-96231b3b80d8
2011-02-18 00:48:11 +00:00
Chris Lattner
3a5004dc3e Fix PR8946, a missing reg/reg form of movdqu.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123242 91177308-0d34-0410-b5e6-96231b3b80d8
2011-01-11 17:04:55 +00:00
Nick Lewycky
c00210cef2 Add another non-commutable instruction that gas accepts commuted forms for.
Fixes PR8861.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122641 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-30 22:10:49 +00:00
Chris Lattner
7ab3cc32d6 Generalize a previous change, fixing PR8855 - an valid large immediate
rejected by the mc assembler.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122557 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-25 21:36:35 +00:00
Kevin Enderby
76331754d4 Allow a slash, '/', as a prefix separator for X86. rdar://8741045
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@121320 91177308-0d34-0410-b5e6-96231b3b80d8
2010-12-08 23:57:59 +00:00
Rafael Espindola
bfd2d26159 Implement the data16 prefix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120224 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-27 20:29:45 +00:00
Rafael Espindola
5c7106b2e3 Testcase for r120017.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120099 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-24 18:03:57 +00:00
Chris Lattner
cbf5d74e6a implement PR8524, apparently mainline gas accepts movq as an alias for movd
when transfering between i64 gprs and mmx regs.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119931 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-21 08:18:57 +00:00
Chris Lattner
269f10b316 accept lret as an alias for lretl, fixing the reopened part of PR8592
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118916 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-12 18:54:56 +00:00
Chris Lattner
6b5e3978e3 implement PR8592: empirically "lretq" is a "lret" with a rex.w prefix.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118903 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-12 17:41:20 +00:00
Chris Lattner
689cf3cb62 implement aliases for div/idiv that have an explicit A register operand,
implementing rdar://8431864


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118364 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-06 22:41:18 +00:00
Chris Lattner
04a75abe23 add aliases for movs between seg registers and mem. There are multiple
different forms of this instruction (movw/movl/movq) which we reported
as being ambiguous.  Since they all do the same thing, gas just picks the
one with the shortest encoding.  Follow its lead here.

This implements rdar://8208615


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118362 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-06 22:35:34 +00:00
Chris Lattner
8c24b0c699 rework the rotate-by-1 instructions to be defined like the
shift-by-1 instructions, where the asmstring doesn't contain
the implicit 1.  It turns out that a bunch of these rotate
instructions were completely broken because they used 1 
instead of $1.

This fixes assembly mismatches on "rclb	$1, %bl" and friends,
where we used to generate the 3 byte form, we now generate the
proper 2-byte form.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118355 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-06 21:23:40 +00:00
Chris Lattner
235705b9ca change the fp comparison instructions to not have %st0 explicitly
listed in its asm string, for consistency with the other similar
instructions.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118354 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-06 20:55:09 +00:00
Chris Lattner
fb7000fcbd correct suffix matching to search for s/l/t suffixes on
floating point stack instructions instead of looking for b/w/l/q.

This fixes issues where we'd accidentally match fistp to fistpl,
when it is in fact an ambiguous instruction.

This changes the behavior of llvm-mc to reject fstp, which was the
correct fix for rdar://8456389:
t.s:1:1: error: ambiguous instructions require an explicit suffix (could be 'fstps', 'fstpl', or 'fstpt')
fstp	(%rax)

it also causes us to correctly reject fistp and fist, which addresses
PR8528:

t.s:2:1: error: ambiguous instructions require an explicit suffix (could be 'fistps', or 'fistpl')
fistp (%rax)
^
t.s:3:1: error: ambiguous instructions require an explicit suffix (could be 'fists', or 'fistl')
fist (%rax)
^

Thanks to Ismail Donmez for tracking down the issue here!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@118346 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-06 18:28:02 +00:00
Chris Lattner
acc473fcf9 "mov[zs]x (mem), GR16" are not ambiguous: the mem
must be 8 bits.  Support this memory form.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117902 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-01 05:41:10 +00:00
Chris Lattner
b501d4f673 Implement enough of the missing instalias support to get
aliases installed and working.  They now work when the
matched pattern and the result instruction have exactly
the same operand list.

This is now enough for us to define proper aliases for
movzx and movsx, implementing rdar://8017633 and PR7459.

Note that we do not accept instructions like:
  movzx 0(%rsp), %rsi

GAS accepts this instruction, but it doesn't make any
sense because we don't know the size of the memory
operand.  It could be 8/16/32 bits.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117901 91177308-0d34-0410-b5e6-96231b3b80d8
2010-11-01 05:34:34 +00:00
Andrew Trick
0966ec0861 Reverting r117031 to cleanup valgrind errors.
It doesn't look like anything is wrong with the checkin,
but the new test cases expose a mem bug in AsmParser.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117087 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-22 03:58:29 +00:00
Kevin Enderby
0b9325c97d More tweaks to X86 instructions to allow the 'w' suffix in places it makes
sense, when the instruction takes the 16-bit ax register or m16 memory
location.  These changes to llvm-mc matches what the darwin assembler allows
for these instructions.  Also added the missing flex (without the wait prefix)
and ud2a as an alias to ud2 (still to add ud2b).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@117031 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-21 17:16:46 +00:00
Kevin Enderby
87f4a1a433 Added a few tweaks to the Intel Descriptor-table support instructions to allow
word forms and suffixed versions to match the darwin assembler in 32-bit and
64-bit modes.  This is again for use just with assembly source for llvm-mc .


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116773 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-19 00:01:44 +00:00
Kevin Enderby
7aef62ff8c Added a handful of x86-32 instructions that were missing so that llvm-mc would
be more complete.  These are only expected to be used by llvm-mc with assembly
source so there is no pattern, [], in the .td files.  Most are being added to
X86InstrInfo.td as Chris suggested and only comments about register uses are
added.  Suggestions welcome on the .td changes as I'm not sure on every detail
of the x86 records.  More missing instructions will be coming.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116716 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-18 17:04:36 +00:00
Chris Lattner
508fc4708b Replace a gross hack (the MOV64ri_alt instruction) with a slightly less
gross hack (having the asmmatcher handle the alias).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115685 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-05 21:09:45 +00:00
Chris Lattner
3286db670c move X86 subdir up a level
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115292 91177308-0d34-0410-b5e6-96231b3b80d8
2010-10-01 04:32:20 +00:00