Re: [9fans] 9vx and Go
erik quanstrom once said: > > No. They're written using BYTE instructions where needed. > > > > Currently 8g will only generate 387 style fp code but the > > is to eventually use SSE. See http://golang.org/issue/3912. > > > > that's not what i read. i read that it's going to be a compile-time > option. surely they're not sneaking xmm in the side door. Sort of. The plan is to use SSE by default but use an environment variable (and compiler flag) to disable it. This is how it works on ARM for different ABIs. You set GOARM=5 or whatever and the compiler and runtime won't use anything after that revision. Anthony
Re: [9fans] 9vx and Go
> No. They're written using BYTE instructions where needed. > > Currently 8g will only generate 387 style fp code but the > is to eventually use SSE. See http://golang.org/issue/3912. > that's not what i read. i read that it's going to be a compile-time option. surely they're not sneaking xmm in the side door. - erik
Re: [9fans] 9vx and Go
oh no, not MMX. SSE/SSE2 surely (ie, XMM)? On 11 December 2012 00:10, Anthony Martin wrote: > It is if you're using MMX registers.
Re: [9fans] 9vx and Go
erik quanstrom once said: > On Mon Dec 10 19:11:39 EST 2012, al...@pbrane.org wrote: > > Charles Forsyth once said: > > > MOVQ isn't a 32-bit instruction. > > > > It is if you're using MMX registers. > > does 8g default to using mmx? No. They're written using BYTE instructions where needed. Currently 8g will only generate 387 style fp code but the is to eventually use SSE. See http://golang.org/issue/3912. Anthony
Re: [9fans] 9vx and Go
On Mon Dec 10 19:11:39 EST 2012, al...@pbrane.org wrote: > Charles Forsyth once said: > > MOVQ isn't a 32-bit instruction. > > It is if you're using MMX registers. does 8g default to using mmx? - erik
Re: [9fans] 9vx and Go
Charles Forsyth once said: > MOVQ isn't a 32-bit instruction. It is if you're using MMX registers. Anthony
Re: [9fans] 9vx and Go
MOVQ isn't a 32-bit instruction. On 10 December 2012 16:42, Anthony Martin wrote: > There's also a few instructions (MOVQ, EMMS, etc.)
Re: [9fans] 9vx and Go
lu...@proxima.alt.za once said: > > Yes, the tsemacquire syscall is not currently implemented in 9vx. > > The "ticks" field is also not present in the mach structure, so adding > tsemacquire isn't trivial. I was hoping to get away with just adding > the field, but if the comment is correct, I need at minimum to add > code to keep the ticks up to date and I can't seem to find model code > in Plan 9 to do it. I guess I'm drowning... I have a few patches to support Go in my vx32 tree. I've made lots of other changes so it might take me a while to get a clean patch to David. For tsemacquire, you can just s/m->ticks/msec()/. There's also a few instructions (MOVQ, EMMS, etc.) that have to be added to libvx32/emu.c since the Go runtime and standard library use them. Cheers, Anthony
Re: [9fans] 9vx and Go
> Yes, the tsemacquire syscall is not currently implemented in 9vx. The "ticks" field is also not present in the mach structure, so adding tsemacquire isn't trivial. I was hoping to get away with just adding the field, but if the comment is correct, I need at minimum to add code to keep the ticks up to date and I can't seem to find model code in Plan 9 to do it. I guess I'm drowning... ++L
Re: [9fans] 9vx and Go
> If you plan to work on vx32, please use the following > repository, since it should contain the most recent work. > > https://bitbucket.org/0intro/vx32 > > You could send patches directly to myself since Ron Minnich > handed the repository off to me. Will do... ++L
Re: [9fans] 9vx and Go
> Trying to execute Go programs in 9vx suggests that somehow the new > syscalls required by the Go runtime are not supported. There are a > few possible ways in which my installation is at fault, but before I > dig deeper (or ask different questions) I want to know that the > problem is not in 9vx itself. > > If I need to update 9vx in some way, it is definitely worth my while > to do so. Yes, the tsemacquire syscall is not currently implemented in 9vx. If you plan to work on vx32, please use the following repository, since it should contain the most recent work. https://bitbucket.org/0intro/vx32 You could send patches directly to myself since Ron Minnich handed the repository off to me. -- David du Colombier
[9fans] 9vx and Go
Trying to execute Go programs in 9vx suggests that somehow the new syscalls required by the Go runtime are not supported. There are a few possible ways in which my installation is at fault, but before I dig deeper (or ask different questions) I want to know that the problem is not in 9vx itself. If I need to update 9vx in some way, it is definitely worth my while to do so. ++L
