public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug c/23630] New: built-ins MMX regression
@ 2005-08-30 9:22 prakash at punnoor dot de
2005-08-30 9:26 ` [Bug c/23630] " prakash at punnoor dot de
` (10 more replies)
0 siblings, 11 replies; 12+ messages in thread
From: prakash at punnoor dot de @ 2005-08-30 9:22 UTC (permalink / raw)
To: gcc-bugs
I am using MMX built-ins and gcc-4.0-20050825 and I am experiencing generation
of a lot of uneeded movq. I don't know which gcc snapshot introduced this, but a
I know that some pre-release gcc 4.0 didn't show this bad behaviour.
BTW, this is using gcc built-ins. The situation is much wors when using
intrinsics via mmintrin.h. (Again old pre4.0 gcc didn't have the problem;
using gcc builtins or mmintin.h intrinsics made no difference; both generated
nice code.)
LC_ALL=C i686-pc-linux-gnu-gcc-4.0.2-beta20050825 -v
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with:
/var/tmp/portage/gcc-4.0.2_beta20050825/work/gcc-4.0-20050825/configure
--prefix=/usr --bindir=/usr/i686-pc-linux-gnu/gcc-bin/4.0.2-beta20050825
--includedir=/usr/lib/gcc/i686-pc-linux-gnu/4.0.2-beta20050825/include
--datadir=/usr/share/gcc-data/i686-pc-linux-gnu/4.0.2-beta20050825
--mandir=/usr/share/gcc-data/i686-pc-linux-gnu/4.0.2-beta20050825/man
--infodir=/usr/share/gcc-data/i686-pc-linux-gnu/4.0.2-beta20050825/info
--with-gxx-include-dir=/usr/lib/gcc/i686-pc-linux-gnu/4.0.2-beta20050825/include/g++-v4
--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --disable-altivec
--enable-nls --without-included-gettext --with-system-zlib --disable-checking
--disable-werror --disable-libunwind-exceptions --disable-multilib
--disable-libgcj --enable-languages=c,c++ --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu
Thread model: posix
gcc version 4.0.2-beta20050825 (Gentoo 4.0.2_beta20050825)
i686-pc-linux-gnu-gcc-4.0.2-beta20050825 mixaudio16.c -save-temps -c -O2
-march=athlon-xp
Source:
typedef int v2si __attribute__ ((vector_size (8)));
typedef int di __attribute__ ((vector_size (8)));
typedef short v4hi __attribute__ ((vector_size (8)));
void MixAudio16_MMX_T(char* src1, char* src2, char* dst)
{
v4hi indata;
v4hi signmask;
v2si loout;
v2si hiout;
v2si temp;
__attribute__((aligned(16))) static const short sm[4] =
{0x8000,0x8000,0x8000,0x8000};
static const v4hi *m = (v4hi*)sm;
indata = *(v4hi*)src1;
signmask = (v4hi)__builtin_ia32_pand((di)indata, *(di*)m);
signmask = __builtin_ia32_pcmpeqw(signmask, *m);
loout = (v2si)__builtin_ia32_punpcklwd(indata, signmask);
hiout = (v2si)__builtin_ia32_punpckhwd(indata, signmask);
indata = *(v4hi*)src2;
signmask = (v4hi)__builtin_ia32_pand((di)indata, *(di*)m);
signmask = __builtin_ia32_pcmpeqw(signmask, *m);
temp = (v2si)__builtin_ia32_punpcklwd(indata, signmask);
loout = __builtin_ia32_paddd(loout, temp);
temp = (v2si)__builtin_ia32_punpckhwd(indata, signmask);
hiout = __builtin_ia32_paddd(hiout, temp);
*(v4hi*)dst = __builtin_ia32_packssdw(loout, hiout);
__builtin_ia32_emms();
return;
}
assembler:
00002e50 <MixAudio16_MMX_T>:
2e50: 55 push %ebp
2e51: 89 e5 mov %esp,%ebp
2e53: 83 ec 10 sub $0x10,%esp
2e56: 8b 15 04 00 00 00 mov 0x4,%edx
2e5c: 8b 45 08 mov 0x8(%ebp),%eax
2e5f: 0f 6f 10 movq (%eax),%mm2
2e62: 0f 6f ca movq %mm2,%mm1
2e65: 8b 45 0c mov 0xc(%ebp),%eax
2e68: 0f 7f 55 f8 movq %mm2,0xfffffff8(%ebp)
2e6c: 0f 6f 45 f8 movq 0xfffffff8(%ebp),%mm0
2e70: 0f db 02 pand (%edx),%mm0
2e73: 0f 7f 45 f0 movq %mm0,0xfffffff0(%ebp)
2e77: 0f 6f 45 f0 movq 0xfffffff0(%ebp),%mm0
2e7b: 0f 75 02 pcmpeqw (%edx),%mm0
2e7e: 0f 61 c8 punpcklwd %mm0,%mm1
2e81: 0f 69 d0 punpckhwd %mm0,%mm2
2e84: 0f 7f 4d f8 movq %mm1,0xfffffff8(%ebp)
2e88: 0f 6f 5d f8 movq 0xfffffff8(%ebp),%mm3
2e8c: 0f 7f 55 f8 movq %mm2,0xfffffff8(%ebp)
2e90: 0f 6f 10 movq (%eax),%mm2
2e93: 0f 6f 65 f8 movq 0xfffffff8(%ebp),%mm4
2e97: 0f 7f 55 f8 movq %mm2,0xfffffff8(%ebp)
2e9b: 0f 6f 45 f8 movq 0xfffffff8(%ebp),%mm0
2e9f: 0f 6f ca movq %mm2,%mm1
2ea2: 0f db 02 pand (%edx),%mm0
2ea5: 8b 45 10 mov 0x10(%ebp),%eax
2ea8: 0f 7f 45 f0 movq %mm0,0xfffffff0(%ebp)
2eac: 0f 6f 45 f0 movq 0xfffffff0(%ebp),%mm0
2eb0: 0f 75 02 pcmpeqw (%edx),%mm0
2eb3: 0f 61 c8 punpcklwd %mm0,%mm1
2eb6: 0f 69 d0 punpckhwd %mm0,%mm2
2eb9: 0f 7f 4d f8 movq %mm1,0xfffffff8(%ebp)
2ebd: 0f fe 5d f8 paddd 0xfffffff8(%ebp),%mm3
2ec1: 0f 7f 55 f8 movq %mm2,0xfffffff8(%ebp)
2ec5: 0f fe 65 f8 paddd 0xfffffff8(%ebp),%mm4
2ec9: 0f 6b dc packssdw %mm4,%mm3
2ecc: 0f 7f 18 movq %mm3,(%eax)
2ecf: 0f 77 emms
2ed1: c9 leave
2ed2: c3 ret
2ed3: 8d b6 00 00 00 00 lea 0x0(%esi),%esi
2ed9: 8d bc 27 00 00 00 00 lea 0x0(%edi),%edi
--
Summary: built-ins MMX regression
Product: gcc
Version: 4.0.2
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: prakash at punnoor dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC target triplet: i?86-*-*
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c/23630] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
@ 2005-08-30 9:26 ` prakash at punnoor dot de
2005-08-30 9:27 ` prakash at punnoor dot de
` (9 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: prakash at punnoor dot de @ 2005-08-30 9:26 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From prakash at punnoor dot de 2005-08-30 09:22 -------
Created an attachment (id=9618)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9618&action=view)
preprocessed file
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c/23630] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
2005-08-30 9:26 ` [Bug c/23630] " prakash at punnoor dot de
@ 2005-08-30 9:27 ` prakash at punnoor dot de
2005-08-30 9:38 ` prakash at punnoor dot de
` (8 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: prakash at punnoor dot de @ 2005-08-30 9:27 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From prakash at punnoor dot de 2005-08-30 09:25 -------
Created an attachment (id=9619)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=9619&action=view)
preprocessed file
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug c/23630] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
2005-08-30 9:26 ` [Bug c/23630] " prakash at punnoor dot de
2005-08-30 9:27 ` prakash at punnoor dot de
@ 2005-08-30 9:38 ` prakash at punnoor dot de
2005-08-30 10:26 ` [Bug target/23630] " pinskia at gcc dot gnu dot org
` (7 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: prakash at punnoor dot de @ 2005-08-30 9:38 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From prakash at punnoor dot de 2005-08-30 09:26 -------
(From update of attachment 9618)
uploaded the wrong file, sorry.
--
What |Removed |Added
----------------------------------------------------------------------------
Attachment #9618 is|0 |1
obsolete| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (2 preceding siblings ...)
2005-08-30 9:38 ` prakash at punnoor dot de
@ 2005-08-30 10:26 ` pinskia at gcc dot gnu dot org
2005-08-30 10:40 ` [Bug target/23630] [4.0 Regression] " bonzini at gcc dot gnu dot org
` (6 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-08-30 10:26 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Component|c |target
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (3 preceding siblings ...)
2005-08-30 10:26 ` [Bug target/23630] " pinskia at gcc dot gnu dot org
@ 2005-08-30 10:40 ` bonzini at gcc dot gnu dot org
2005-08-31 0:38 ` rth at gcc dot gnu dot org
` (5 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: bonzini at gcc dot gnu dot org @ 2005-08-30 10:40 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Known to fail| |4.0.2
Known to work| |4.1.0 3.4.5
Last reconfirmed|0000-00-00 00:00:00 |2005-08-30 10:39:36
date| |
Summary|built-ins MMX regression |[4.0 Regression] built-ins
| |MMX regression
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (4 preceding siblings ...)
2005-08-30 10:40 ` [Bug target/23630] [4.0 Regression] " bonzini at gcc dot gnu dot org
@ 2005-08-31 0:38 ` rth at gcc dot gnu dot org
2005-08-31 1:54 ` rth at gcc dot gnu dot org
` (4 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-08-31 0:38 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2005-08-31 00:23 -------
Possible fallout from PR23517.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (5 preceding siblings ...)
2005-08-31 0:38 ` rth at gcc dot gnu dot org
@ 2005-08-31 1:54 ` rth at gcc dot gnu dot org
2005-08-31 5:00 ` cvs-commit at gcc dot gnu dot org
` (3 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-08-31 1:54 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
AssignedTo|unassigned at gcc dot gnu |rth at gcc dot gnu dot org
|dot org |
Status|NEW |ASSIGNED
Last reconfirmed|2005-08-30 10:39:36 |2005-08-31 00:38:30
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (6 preceding siblings ...)
2005-08-31 1:54 ` rth at gcc dot gnu dot org
@ 2005-08-31 5:00 ` cvs-commit at gcc dot gnu dot org
2005-08-31 5:01 ` cvs-commit at gcc dot gnu dot org
` (2 subsequent siblings)
10 siblings, 0 replies; 12+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-08-31 5:00 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-08-31 04:55 -------
Subject: Bug 23630
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-4_0-branch
Changes by: rth@gcc.gnu.org 2005-08-31 04:55:40
Modified files:
gcc : ChangeLog expr.c
Log message:
PR target/23630
* expr.c (expand_expr_real_1) <VIEW_CONVERT_EXPR>: Use gen_lowpart
whenever the mode sizes match.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=2.7592.2.401&r2=2.7592.2.402
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.778.6.2&r2=1.778.6.3
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (8 preceding siblings ...)
2005-08-31 5:01 ` cvs-commit at gcc dot gnu dot org
@ 2005-08-31 5:01 ` rth at gcc dot gnu dot org
2005-08-31 5:06 ` rth at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-08-31 5:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From rth at gcc dot gnu dot org 2005-08-31 05:01 -------
Fixed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |RESOLVED
Resolution| |FIXED
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (7 preceding siblings ...)
2005-08-31 5:00 ` cvs-commit at gcc dot gnu dot org
@ 2005-08-31 5:01 ` cvs-commit at gcc dot gnu dot org
2005-08-31 5:01 ` rth at gcc dot gnu dot org
2005-08-31 5:06 ` rth at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-08-31 5:01 UTC (permalink / raw)
To: gcc-bugs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-08-31 05:00 -------
Subject: Bug 23630
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: rth@gcc.gnu.org 2005-08-31 05:00:37
Modified files:
gcc : ChangeLog expr.c
Log message:
PR target/23630
* expr.c (expand_expr_real_1) <VIEW_CONVERT_EXPR>: Use gen_lowpart
whenever the mode sizes match.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.9853&r2=2.9854
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/expr.c.diff?cvsroot=gcc&r1=1.810&r2=1.811
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
* [Bug target/23630] [4.0 Regression] built-ins MMX regression
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
` (9 preceding siblings ...)
2005-08-31 5:01 ` rth at gcc dot gnu dot org
@ 2005-08-31 5:06 ` rth at gcc dot gnu dot org
10 siblings, 0 replies; 12+ messages in thread
From: rth at gcc dot gnu dot org @ 2005-08-31 5:06 UTC (permalink / raw)
To: gcc-bugs
--
What |Removed |Added
----------------------------------------------------------------------------
Target Milestone|--- |4.0.2
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23630
^ permalink raw reply [flat|nested] 12+ messages in thread
end of thread, other threads:[~2005-08-31 5:01 UTC | newest]
Thread overview: 12+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-08-30 9:22 [Bug c/23630] New: built-ins MMX regression prakash at punnoor dot de
2005-08-30 9:26 ` [Bug c/23630] " prakash at punnoor dot de
2005-08-30 9:27 ` prakash at punnoor dot de
2005-08-30 9:38 ` prakash at punnoor dot de
2005-08-30 10:26 ` [Bug target/23630] " pinskia at gcc dot gnu dot org
2005-08-30 10:40 ` [Bug target/23630] [4.0 Regression] " bonzini at gcc dot gnu dot org
2005-08-31 0:38 ` rth at gcc dot gnu dot org
2005-08-31 1:54 ` rth at gcc dot gnu dot org
2005-08-31 5:00 ` cvs-commit at gcc dot gnu dot org
2005-08-31 5:01 ` cvs-commit at gcc dot gnu dot org
2005-08-31 5:01 ` rth at gcc dot gnu dot org
2005-08-31 5:06 ` rth at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).