Skip to content

x86::tbm::bextri triggers an LLVM codegen error #26

New issue

Have a question about this project? # for a free GitHub account to open an issue and contact its maintainers and the community.

#

By clicking “#”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? # to your account

Jump to bottom
Closed
gnzlbg opened this issue Sep 19, 2017 · 3 comments
Closed

x86::tbm::bextri triggers an LLVM codegen error #26

gnzlbg opened this issue Sep 19, 2017 · 3 comments
Labels
A-x86

Comments

@gnzlbg
Copy link
Contributor

gnzlbg commented Sep 19, 2017

It is the only instruction not implemented from the TBM feature set.
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
3ce2f12 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
9621515 
Closes rust-lang#26 .
@gnzlbg
Copy link
Contributor Author

gnzlbg commented Nov 6, 2017 •
edited
Loading

@alexcrichton @BurntSushi the root of the issue is that tbm::bextri takes an argument (u32/u64) that must be immediate. Lucky for us, only the first 16 bits of this value matter. Unlucky for us, using a constify_imm16!, with a match statement containing 65534 arms, makes the stdsimd crate take between forever and never to compile 😆

Thoughts?

@alexcrichton
Copy link
Member

I'd probably just leave this open for now, I'm not sure how we'd fix it :(

gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
a303fba 
Closes rust-lang#26 .
@gnzlbg gnzlbg mentioned this issue Nov 6, 2017
Closed
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
14fd03d 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
724f459 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
d48a21e 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
8cad6f9 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 6, 2017
@gnzlbg
[tbm] add bextri
a9feed7 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 7, 2017
@gnzlbg
[tbm] add bextri
dfc943b 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 7, 2017
@gnzlbg
[tbm] add bextri
b40cbdf 
Closes rust-lang#26 .
gnzlbg added a commit to gnzlbg/stdsimd that referenced this issue Nov 7, 2017
@gnzlbg
[tbm] add bextri
7cb8c0c 
Closes rust-lang#26 .
@gnzlbg gnzlbg mentioned this issue Dec 22, 2017
Closed
@alexcrichton
Copy link
Member

I'm gonna close this in favor of #248 as I believe they're basically the same issue.

# for free to join this conversation on GitHub. Already have an account? # to comment
Assignees
No one assigned
Labels
A-x86
Projects
None yet
Milestone
No milestone
Development

No branches or pull requests
2 participants
@alexcrichton @gnzlbg