* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
@ 2022-01-12 14:22 ` lh_mouse at 126 dot com
2022-01-12 15:15 ` rguenth at gcc dot gnu.org
` (5 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: lh_mouse at 126 dot com @ 2022-01-12 14:22 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
LIU Hao <lh_mouse at 126 dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |lh_mouse at 126 dot com
--- Comment #2 from LIU Hao <lh_mouse at 126 dot com> ---
As per
<https://docs.microsoft.com/en-us/cpp/build/x64-calling-convention?view=msvc-170#parameter-passing>
> Structs and unions of size 8, 16, 32, or 64 bits, and __m64 types, are
> passed as if they were integers of the same size. Structs or unions of
> other sizes are passed as a pointer to memory allocated by the caller.
GCC behavior seems incorrect.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
2022-01-12 14:22 ` [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm lh_mouse at 126 dot com
@ 2022-01-12 15:15 ` rguenth at gcc dot gnu.org
2022-01-13 5:07 ` 10walls at gmail dot com
` (4 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: rguenth at gcc dot gnu.org @ 2022-01-12 15:15 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Status|UNCONFIRMED |NEW
CC| |10walls at gmail dot com
Last reconfirmed| |2022-01-12
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Thus confirmed.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
2022-01-12 14:22 ` [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm lh_mouse at 126 dot com
2022-01-12 15:15 ` rguenth at gcc dot gnu.org
@ 2022-01-13 5:07 ` 10walls at gmail dot com
2023-01-14 12:10 ` nightstrike at gmail dot com
` (3 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: 10walls at gmail dot com @ 2022-01-13 5:07 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
--- Comment #4 from jon_y <10walls at gmail dot com> ---
I can't seem to change the bug status to confirmed.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
` (2 preceding siblings ...)
2022-01-13 5:07 ` 10walls at gmail dot com
@ 2023-01-14 12:10 ` nightstrike at gmail dot com
2023-04-06 12:18 ` lh_mouse at 126 dot com
` (2 subsequent siblings)
6 siblings, 0 replies; 7+ messages in thread
From: nightstrike at gmail dot com @ 2023-01-14 12:10 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
nightstrike <nightstrike at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |nightstrike at gmail dot com
--- Comment #5 from nightstrike <nightstrike at gmail dot com> ---
(In reply to jon_y from comment #4)
> I can't seem to change the bug status to confirmed.
"NEW" is confirmed
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
` (3 preceding siblings ...)
2023-01-14 12:10 ` nightstrike at gmail dot com
@ 2023-04-06 12:18 ` lh_mouse at 126 dot com
2023-04-06 15:09 ` lh_mouse at 126 dot com
2023-04-10 12:44 ` ebotcazou at gcc dot gnu.org
6 siblings, 0 replies; 7+ messages in thread
From: lh_mouse at 126 dot com @ 2023-04-06 12:18 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
--- Comment #6 from LIU Hao <lh_mouse at 126 dot com> ---
Looks like this has been fixed? https://gcc.godbolt.org/z/xP5E76aYz
Despite that however, GCC generates suboptimal code that uses an XMM register
to perform the bitwise AND operation.
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
` (4 preceding siblings ...)
2023-04-06 12:18 ` lh_mouse at 126 dot com
@ 2023-04-06 15:09 ` lh_mouse at 126 dot com
2023-04-10 12:44 ` ebotcazou at gcc dot gnu.org
6 siblings, 0 replies; 7+ messages in thread
From: lh_mouse at 126 dot com @ 2023-04-06 15:09 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
--- Comment #7 from LIU Hao <lh_mouse at 126 dot com> ---
clang generates 14 bytes:
```
mov rax, 0x7FFFFFFFFFFFFFFF # 48 B8 FF FF FF FF FF FF FF 7F
and rax, rcx # 48 23 C1
ret # C3
``
but in principle this function requires only 8 bytes:
```
lea rax, qword ptr [rcx + rcx] # 48 8D 04 09
shr rax, 1 # 48 D1 E8
ret # C3
``
^ permalink raw reply [flat|nested] 7+ messages in thread* [Bug target/82028] Windows x86_64 should not pass float aggregates in xmm
[not found] <bug-82028-4@http.gcc.gnu.org/bugzilla/>
` (5 preceding siblings ...)
2023-04-06 15:09 ` lh_mouse at 126 dot com
@ 2023-04-10 12:44 ` ebotcazou at gcc dot gnu.org
6 siblings, 0 replies; 7+ messages in thread
From: ebotcazou at gcc dot gnu.org @ 2023-04-10 12:44 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82028
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
CC| |ebotcazou at gcc dot gnu.org
--- Comment #8 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
Fixed in 9.3 and later.
*** This bug has been marked as a duplicate of bug 85667 ***
^ permalink raw reply [flat|nested] 7+ messages in thread