[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-devel] another SPARC issue
From: |
Vince Weaver |
Subject: |
[Qemu-devel] another SPARC issue |
Date: |
Tue, 5 Aug 2008 16:20:58 -0400 (EDT) |
Hello
so I'm still trying to get bzip to work under sparc32plus-linux-user
This time the problem is with the "ldda" instruction, which is loading off
of the block-read %asi (I am learning way more than I want to about
obscure parts of the SPARC architecture).
The code involved is doing an optimized memory copy, so it's using the
floating point unit to accelerate this.
The instruction is
ldda [ %o1 + 0x40 ] %asi, %f16
but under Qemu for some reason 0x80 is added to %o1 (instead of 0x40).
Indeed if you look at the generated TCG (see below), the 0x40 is being
added in twice. I was digging around in translate.c but can't seem to see
why this is happning.
Any help would be appreciated...
Thanks
Vince
IN: __memcpy_large
0x000000000002b73c: ldda [ %o1 + 0x40 ] %asi, %f16
OP after la:
ld_i32 tmp11,regwptr,$0x8
ld_i32 tmp12,regwptr,$0xc
movi_i32 tmp15,$0x40
movi_i32 tmp16,$0x0
add2_i32 loc9,loc10,tmp11,tmp12,tmp15,tmp16
movi_i32 pc_0,$0x2b73c
movi_i32 pc_1,$0x0
movi_i32 npc_0,$0x2b740
movi_i32 npc_1,$0x0
movi_i32 tmp15,$0x40
movi_i32 tmp16,$0x0
add2_i32 loc9,loc10,loc9,loc10,tmp15,tmp16
ld_i32 tmp17,env,$0xd9c8
movi_i32 tmp18,$0x8
movi_i32 tmp19,$0x10
movi_i32 tmp20,$helper_ldf_asi
call tmp20,$0x0,$0,loc9,loc10,tmp17,tmp18,tmp19
movi_i32 pc_0,$0x2b740
movi_i32 pc_1,$0x0
movi_i32 npc_0,$0x2b744
movi_i32 npc_1,$0x0
movi_i32 tmp17,$helper_debug
call tmp17,$0x0,$0
exit_tb $0x0
end
- [Qemu-devel] another SPARC issue,
Vince Weaver <=
- Re: [Qemu-devel] another SPARC issue, Laurent Desnogues, 2008/08/05
- Re: [Qemu-devel] another SPARC issue, Vince Weaver, 2008/08/05
- Re: [Qemu-devel] another SPARC issue, Laurent Desnogues, 2008/08/06
- Re: [Qemu-devel] another SPARC issue, Blue Swirl, 2008/08/06
- [Qemu-devel] one more SPARC issue, Vince Weaver, 2008/08/06
- Re: [Qemu-devel] one more SPARC issue, Julian Seward, 2008/08/06
- Re: [Qemu-devel] one more SPARC issue, Blue Swirl, 2008/08/06