e84a7911c4
Bill implemented this.
...
llvm-svn: 63752
2009-02-04 19:09:07 +00:00
553fd7e1eb
add a note, this is why we're faster at SciMark-MonteCarlo with
...
SSE disabled.
llvm-svn: 63751
2009-02-04 19:08:01 +00:00
f31f288863
The memory alignment requirement on some of the mov{h|l}p{d|s} patterns are 16-byte. That is overly strict. These instructions read / write f64 memory locations without alignment requirement.
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llvm-svn: 63195
2009-01-28 08:35:02 +00:00
9a8eb0d534
add a note
...
llvm-svn: 56391
2008-09-20 19:17:53 +00:00
f076d5eea8
add a note
...
llvm-svn: 54964
2008-08-19 00:41:02 +00:00
3fc2372d3a
- Fix a x86 vector isel bug: illegal transformation of a vector_shuffle into a
...
shift.
- Add a readme entry for a missing vector_shuffle optimization that results in
awful codegen.
llvm-svn: 52740
2008-06-25 20:52:59 +00:00
8647b875cc
This is done.
...
llvm-svn: 51526
2008-05-24 00:10:13 +00:00
04d24edcbb
Use movlps / movhps to modify low / high half of 16-byet memory location.
...
llvm-svn: 51501
2008-05-23 21:23:16 +00:00
66eea1b9b3
Elaborate on the entry on integer vector multiplication by constants.
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llvm-svn: 51491
2008-05-23 18:05:39 +00:00
d25cb8e0d2
New entry.
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llvm-svn: 51487
2008-05-23 17:28:11 +00:00
3546c2b4e4
we compile multiply-by-constant into horrible code. Doesn't sse4 have some
...
instruction for doing this?
llvm-svn: 51473
2008-05-23 04:29:53 +00:00
03ce206143
add a note
...
llvm-svn: 51062
2008-05-13 19:56:20 +00:00
d17f58ae6e
add a note
...
llvm-svn: 51060
2008-05-13 18:48:54 +00:00
1120279ae6
Instead of a vector load, shuffle and then extract an element. Load the element from address with an offset.
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pshufd $1, (%rdi), %xmm0
movd %xmm0, %eax
=>
movl 4(%rdi), %eax
llvm-svn: 51026
2008-05-13 08:35:03 +00:00
3f40c69083
On x86, it's safe to treat i32 load anyext as a normal i32 load. Ditto for i8 anyext load to i16.
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llvm-svn: 51019
2008-05-13 00:54:02 +00:00
b980f6fb3d
Xform bitconvert(build_pair(load a, load b)) to a single load if the load locations are at the right offset from each other.
...
llvm-svn: 51008
2008-05-12 23:04:07 +00:00
a38e72d247
Add note
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llvm-svn: 50959
2008-05-11 14:33:15 +00:00
aeb23a8a34
add a note, this is actually not too bad to implement.
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llvm-svn: 49466
2008-04-10 05:54:50 +00:00
c692188075
move the x86-32 part of PR2108 here.
...
llvm-svn: 49465
2008-04-10 05:37:47 +00:00
b6387c8a74
Finish implementing a readme entry: when inserting an i64 variable
...
into a vector of zeros or undef, and when the top part is obviously
zero, we can just use movd + shuffle. This allows us to compile
vec_set-B.ll into:
_test3:
movl $1234567, %eax
andl 4(%esp), %eax
movd %eax, %xmm0
ret
instead of:
_test3:
subl $28, %esp
movl $1234567, %eax
andl 32(%esp), %eax
movl %eax, (%esp)
movl $0, 4(%esp)
movq (%esp), %xmm0
addl $28, %esp
ret
llvm-svn: 48090
2008-03-09 05:42:06 +00:00
93930dc28c
add a note
...
llvm-svn: 48064
2008-03-09 01:08:22 +00:00
eef374c197
Implement a readme entry, compiling
...
#include <xmmintrin.h>
__m128i doload64(short x) {return _mm_set_epi16(0,0,0,0,0,0,0,1);}
into:
movl $1, %eax
movd %eax, %xmm0
ret
instead of a constant pool load.
llvm-svn: 48063
2008-03-09 01:05:04 +00:00
35adf46967
This one looks easy, add a note.
...
llvm-svn: 48055
2008-03-08 22:32:39 +00:00
a76e23a935
move these to the appropriate file
...
llvm-svn: 48054
2008-03-08 22:28:45 +00:00
7c08a01698
evan implemented this.
...
llvm-svn: 47948
2008-03-05 17:11:51 +00:00
2acd0c25f6
add a note
...
llvm-svn: 47939
2008-03-05 07:22:39 +00:00
a70df9e2ee
Evan implemented these.
...
llvm-svn: 47828
2008-03-02 18:05:14 +00:00
eb63b09206
upgrade some entries, remove stuff that is done.
...
llvm-svn: 47109
2008-02-14 06:19:02 +00:00
eea32990a9
readme updates
...
llvm-svn: 47051
2008-02-13 07:06:12 +00:00
2d77e8e446
Enable SSE4 codegen and pattern matching.
...
Add some notes to the README.
llvm-svn: 46949
2008-02-11 04:19:36 +00:00
2e4719ec55
add a note
...
llvm-svn: 46413
2008-01-27 07:31:41 +00:00
2dd23b9f32
Add some notes.
...
llvm-svn: 46405
2008-01-26 20:12:07 +00:00
d2b8a36f0e
One readme entry is done, one is really easy (Evan, want to investigate
...
eliminating the llvm.x86.sse2.loadl.pd intrinsic?), one shuffle optzn
may be done (if shufps is better than pinsw, Evan, please review), and
we already know about LICM of simple instructions.
llvm-svn: 45407
2007-12-29 19:31:47 +00:00
78c460c8c4
New entry.
...
llvm-svn: 45280
2007-12-21 01:31:58 +00:00
909a54ccd4
add a note.
...
llvm-svn: 43444
2007-10-29 06:19:48 +00:00
855011e5c6
Small label changes.
...
llvm-svn: 42549
2007-10-02 21:02:53 +00:00
4eb7ca4b4c
Now with source code.
...
llvm-svn: 42548
2007-10-02 21:01:16 +00:00
88ea107fdb
Micro-optimization -- missed LICM opportunity.
...
llvm-svn: 42542
2007-10-02 19:55:05 +00:00
fef69f5b4a
move PR1264 here.
...
llvm-svn: 42345
2007-09-26 06:15:48 +00:00
51883acec1
add a note
...
llvm-svn: 41359
2007-08-24 15:17:59 +00:00
db8adb9941
add a note.
...
llvm-svn: 41103
2007-08-15 16:58:38 +00:00
bdc69595d9
another missed SSE optimization
...
llvm-svn: 39772
2007-07-12 06:31:38 +00:00
f51bd666d9
add a note
...
llvm-svn: 38507
2007-07-10 20:03:50 +00:00
4ad38abd40
Made this into a bug report: PR1286
...
llvm-svn: 35439
2007-03-28 19:07:34 +00:00
d551a18783
Support added for shifts and unpacking MMX instructions.
...
llvm-svn: 35266
2007-03-22 18:42:45 +00:00
2ebb2e99d1
a note
...
llvm-svn: 34670
2007-02-27 17:21:09 +00:00
2455e6937b
This is done.
...
llvm-svn: 32591
2006-12-15 05:50:39 +00:00
ac1fa442a7
This is done.
...
llvm-svn: 32584
2006-12-14 19:45:32 +00:00
9ffa6a60ed
Add note.
...
llvm-svn: 32561
2006-12-13 20:59:43 +00:00
6727f2a5f9
this is done
...
llvm-svn: 32424
2006-12-11 01:01:03 +00:00
Chris Lattner