[Qemu-devel] Can't compile on whacky 2.6/2.4 hybrid

[Qemu-devel] Can't compile on whacky 2.6/2.4 hybrid

[David Barrett]

To be clear, I'm not at all surprised this doesn't compile on my server. 
  I have a custom 2.6 kernel injected into a 2.4 distribution running a 
bunch of ancient libraries and -- *gasp* -- I'm having trouble 
compiling.  (As you might guess, this isn't by choice.)  I don't 
honestly expect to get this to work, but on the off chance that it's 
obvious to somebody, can you suggest any way to get past this compile error?

In file included from /tmp/qemu-0.9.1/target-i386/op.c:2499:
/tmp/qemu-0.9.1/target-i386/ops_sse.h: In function `op_shufps':
/tmp/qemu-0.9.1/target-i386/ops_sse.h:607: Unable to find a register to 
spill in class `SIREG'.
/tmp/qemu-0.9.1/target-i386/ops_sse.h:607: This is the insn:
(insn 72 71 73 (parallel[
             (set (reg:SI 2 ecx [66])
                 (const_int 0 [0x0]))
             (set (reg/f:SI 64)
                 (plus:SI (ashift:SI (reg:SI 2 ecx [66])
                         (const_int 2 [0x2]))
                     (reg/v/f:SI 42)))
             (set (reg/f:SI 0 eax [65])
                 (plus:SI (ashift:SI (reg:SI 2 ecx [66])
                         (const_int 2 [0x2]))
                     (reg/f:SI 0 eax [65])))
             (set (mem/s:BLK (reg/v/f:SI 42) 0)
                 (mem/s:BLK (reg/f:SI 0 eax [65]) 0))
             (use (reg:SI 2 ecx [66]))
             (use (reg:SI 19 dirflag))
         ] ) 394 {rep_movsi} (insn_list 68 (insn_list 69 (insn_list 71 
(nil))))
     (expr_list:REG_DEAD (reg:SI 19 dirflag)
         (expr_list:REG_DEAD (reg/v/f:SI 42)
             (expr_list:REG_UNUSED (reg:SI 2 ecx [66])
                 (expr_list:REG_UNUSED (reg/f:SI 64)
                     (expr_list:REG_UNUSED (reg/f:SI 0 eax [65])
                         (nil)))))))
/tmp/qemu-0.9.1/target-i386/ops_sse.h:607: confused by earlier errors, 
bailing out



I configured it with:

	./configure --disable-sdl --disable-gfx-check

Here's my GCC configuration:

Reading specs from /usr/lib/gcc-lib/i386-linux/3.0.4/specs
Configured with: ../src/configure -v 
--enable-languages=c,c++,java,f77,proto,objc --prefix=/usr 
--infodir=/share/info --mandir=/share/man --enable-shared --with-gnu-as 
--with-gnu-ld --with-system-zlib --enable-long-long --enable-nls 
--without-included-gettext --disable-checking --enable-threads=posix 
--enable-java-gc=boehm --with-cpp-install-dir=bin --enable-objc-gc 
i386-linux
Thread model: posix
gcc version 3.0.4

Thanks for any suggestions you have!

-david

Re: [Qemu-devel] Can't compile on whacky 2.6/2.4 hybrid

[Blue Swirl]

[-- Attachment #1: Type: text/plain, Size: 687 bytes --]

On 3/17/08, David Barrett <dbarrett@quinthar.com> wrote:
> To be clear, I'm not at all surprised this doesn't compile on my server.
>   I have a custom 2.6 kernel injected into a 2.4 distribution running a
>  bunch of ancient libraries and -- *gasp* -- I'm having trouble
>  compiling.  (As you might guess, this isn't by choice.)  I don't
>  honestly expect to get this to work, but on the off chance that it's
>  obvious to somebody, can you suggest any way to get past this compile error?

Could you test the attached patch? It's not a real fix, but I'm trying
to find the range of instructions that need to be converted to TCG. If
the compile fails, please report the error message.

[-- Attachment #2: sse_test.diff --]
[-- Type: plain/text, Size: 1556 bytes --]

Re: [Qemu-devel] Can't compile on whacky 2.6/2.4 hybrid

[David Barrett]

Blue Swirl wrote:
> On 3/17/08, David Barrett <dbarrett@quinthar.com> wrote:
>> To be clear, I'm not at all surprised this doesn't compile on my server.
>>   I have a custom 2.6 kernel injected into a 2.4 distribution running a
>>  bunch of ancient libraries and -- *gasp* -- I'm having trouble
>>  compiling.  (As you might guess, this isn't by choice.)  I don't
>>  honestly expect to get this to work, but on the off chance that it's
>>  obvious to somebody, can you suggest any way to get past this compile error?
> 
> Could you test the attached patch? It's not a real fix, but I'm trying
> to find the range of instructions that need to be converted to TCG. If
> the compile fails, please report the error message.

Well, it gets a lot further now, and compilation stops here:

In file included from /tmp/qemu-0.9.1/target-sparc/op.c:123:
/tmp/qemu-0.9.1/target-sparc/fop_template.h: In function 
`op_load_fpr_QT0_fprf0':
/tmp/qemu-0.9.1/target-sparc/fop_template.h:91: Unable to find a 
register to spill in class `SIREG'.
/tmp/qemu-0.9.1/target-sparc/fop_template.h:91: This is the insn:
(insn 35 34 36 (parallel[
             (set (reg:SI 2 ecx [49])
                 (const_int 0 [0x0]))
             (set (reg/f:SI 1 edx [47])
                 (plus:SI (ashift:SI (reg:SI 2 ecx [49])
                         (const_int 2 [0x2]))
                     (reg/f:SI 1 edx [47])))
             (set (reg/f:SI 0 eax [48])
                 (plus:SI (ashift:SI (reg:SI 2 ecx [49])
                         (const_int 2 [0x2]))
                     (reg/f:SI 0 eax [48])))
             (set (mem/s:BLK (reg/f:SI 1 edx [47]) 0)
                 (mem/s:BLK (reg/f:SI 0 eax [48]) 0))
             (use (reg:SI 2 ecx [49]))
             (use (reg:SI 19 dirflag))
         ] ) 394 {rep_movsi} (insn_list 29 (insn_list 31 (insn_list 32 
(insn_list 34 (nil)))))
     (expr_list:REG_DEAD (reg:SI 19 dirflag)
         (expr_list:REG_UNUSED (reg:SI 2 ecx [49])
             (expr_list:REG_UNUSED (reg/f:SI 1 edx [47])
                 (expr_list:REG_UNUSED (reg/f:SI 0 eax [48])
                     (nil))))))
/tmp/qemu-0.9.1/target-sparc/fop_template.h:91: confused by earlier 
errors, bailing out

-david